Waste Heat Patents (Class 203/DIG8)
  • Patent number: 6165326
    Abstract: A facility for the desalination and purification of sea water or brackish water by solar energy provided with a closed cycle including a thermal solar collector and a heat exchanger in which a heat transfer medium is circulating, and a basin for receiving the sea water or brackish water with the heat exchanger being placed in the basin for heating and evaporating water. A cooling surface is disposed above the basing for condensing the evaporated water which is then diverted to water collectors. The solar collector is located above the cooling surface so as to keep it in the shade.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: December 26, 2000
    Inventor: Johannes Markopulos
  • Patent number: 6120651
    Abstract: A method permits concentration of a water-miscible organic liquid in a mixture of such liquid and water, with recovery of a desired concentrate of the water-miscible organic liquid and water, and a relatively clean water containing only a very low contest of the water-miscible organic liquid which enables disposal of the water in sewage systems, the method thus enhancing the ability to satisfy environmental concerns; the method has particular application to the recovery of a reusable glycol/water mixture from diluted spent aircraft deicer fluid (ADF).
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: September 19, 2000
    Assignee: Inland Technologies Inc.
    Inventors: Peter Henry Firth Gammon, Gary James Dinn, John Joseph Whitten
  • Patent number: 6027607
    Abstract: A process for extracting salt from brine contained in at least one open evaporation basin. At least part of the brine is heated in a heating unit located outside the evaporation basis and returned to the evaporation basin. The heating unit is driven by waste heat from a recooling industrial plant. According to this process, climatic values and the degree of recooling are measured and evaluated in a control unit. At least part of the heated brine and some non-heated brine are sprayed by a spraying device of the evaporation basin. The amount of sprayed brine is regulated by the control unit depending on the measured data.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: February 22, 2000
    Assignee: Krebs & Co. AG
    Inventor: Vicente Gracia Corniel
  • Patent number: 5968321
    Abstract: Distillation system having an evaporator/condenser core with heat transfer plates welded together along their edges to form alternate boiling and condensing chambers. Feed liquid is supplied to the boiling chambers through a pair of heat exchangers which preheats the liquid and a steam stripper utilizing ceramic pieces to remove gasses from the liquid. Vapor from the boiling chambers is compressed and delivered to the condensing chambers where it is condensed and gives up its heat to the liquid in the boiling chambers. Pumps positioned between the two heat exchangers draw the condensed product and unvaporized feed liquid containing dissolved solids from the evaporator/condenser and circulate them through the heat exchangers to transfer heat to the feed liquid.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: October 19, 1999
    Assignee: Ridgewood WaterPure Corporation
    Inventor: Stephan B. Sears
  • Patent number: 5935388
    Abstract: A distillation plant includes a heat pump whose working fluid is compressed by a vapor jet compressor. A collection location for a liquid is arranged in the stripper part of a distillation column of the plant. At least a portion of the collected liquid is provided in the vaporized form as strip vapor. Connections lead from the collection location to a first vaporizer and to a second vaporizer. The liquid can be vaporized in these vaporizers at an elevated and at a reduced pressure respectively. The vapor jet compressor is connected to the two vaporizers and to the column in such a manner that the vapor from the second vaporizer can be compressed under a driving jet action of the vapor from the first vaporizer and used in the column as strip vapor. A pump is arranged in the connection to the first vaporizer and at least one restrictor member is contained in the connection to the second vaporizer.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: August 10, 1999
    Assignee: Sulzer Chemtech AG
    Inventor: Istvan Meszaros
  • Patent number: 5925223
    Abstract: A process and apparatus for improving the thermal efficiency of a steam turbine power generating plant while simultaneously desalinating seawater or brine and purifying water which contains minerals, salts, and other dissolved solids. Exhaust gases from a power plant is heat exchanged against water in a secondary ecomomizer which circulates water at a temperature near, or slightly above the dewpoint of the combustion exhaust of the high-pressure boiler. The heated water is flashed to produce low-pressure steam. The low-pressure steam is condensed against the last effect of a multi-effect desalinization unit. Steam from the first effect of the desalination unit is condensed against steam condensate from the power plant turbine to preheat the condensate and thereby recover heat from the power plant's exhaust gas. Salinous water is fed to the multi-effect desalinization unit to produce fresh water and a concentrated brine.
    Type: Grant
    Filed: April 1, 1997
    Date of Patent: July 20, 1999
    Inventors: Gary D. Simpson, Karl Lin
  • Patent number: 5916422
    Abstract: A method for purifying acetic acid containing at least one component selected from the group consisting of unsaturated compounds and carbonyl compounds as an impurity involves the step of purifying the acetic acid with a distillation column having at least 30 plates by operating the distillation column at a pressure ranging from 40 to 760 mmHg and a reflux ratio of at least 4, and yields a high-quality acetic acid which rates high in the potassium permanganate test without needing of the addition of any chemical to the acetic acid to be purified and a large amount of energy, and is economical.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: June 29, 1999
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Satoshi Kimura, Takashi Ueno, Yoshiaki Morimoto
  • Patent number: 5882485
    Abstract: A process for the separation of dimethyl ether and chloromethane in mixturesA process for the separation of dimethyl ether and chloromethane in mixtures by two distillation steps. In the first step, the mixture is subjected to an extractive distillation with water, aqueous salt solutions or organic liquids as extractant, the top product being chloromethane. In the second step, the dimethyl ether is separated from the extractant.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: March 16, 1999
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Peter Roth, Erhard Leistner, Hans Haverkamp, Wolfgang Wendel, Michael Kleiber
  • Patent number: 5865957
    Abstract: A method for producing butyraldehydes, by separating and purifying mixed butyraldehyde products formed by hydroformylation of propylene, into n-butyraldehyde and isobutyraldehyde by using a distillation column, wherein the distillation column is operated under such conditions that the pressure at the top of the distillation column is within a range of from 0.001 to 0.5 kg/cm.sup.2 G, and the pressure at the bottom of the column is within a range of from 0.05 to 1.0 kg/cm.sup.2 G.
    Type: Grant
    Filed: November 6, 1995
    Date of Patent: February 2, 1999
    Assignee: Mitsubishi Chemical Company
    Inventors: Akio Ueda, Kuninori Sadaie
  • Patent number: 5853549
    Abstract: A large and economical type of multi-stack vertical tube evaporator (MS-VTE) having units of multiple stacks of vertical tube bundles or stages mounted in a single vessel, and having its liquid feed pumped to the uppermost VTE bundle stack or stage and having the feed then cascading downward through the lower bundle stacks in series flow, and wherein all the tube bundles are heated with the same waste steam of no or low $-value, e. g. with turbine reject steam in parallel flow under vacuum into the steam-sides of all tube bundles in the unit through a common steam conduit; and wherein the feed liquid is progressively evaporated from stage to stage or stack to stack and the vapors produced in the tubes of each bundle during the partial evaporation of the feed are separated between the stacks and condensed by parallel flow into one or more condensers.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: December 29, 1998
    Inventor: Hugo H. Sephton
  • Patent number: 5730836
    Abstract: A method for concentrating a clay slurry by subjecting the slurry to indirect heat exchange within a heat exchanger to elevate the temperature of the slurry while specifically suppressing boiling of the liquid within the heat exchanger. The heated slurry is subsequently subjected to a rapid pressure reduction which causes flash evaporation of part of the liquid. The rapid pressure reduction can occur in a separation vessel.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: March 24, 1998
    Assignee: Comalco Aluminium Limited
    Inventors: Christopher Roy Greig, Peter James Tait, Peter John Noble
  • Patent number: 5705036
    Abstract: A water distilling apparatus includes a preheat tank having an inlet and an outlet for storing water from a water source via the inlet, a boiling tank formed of a conductive casing connected to a ground potential and having an inlet in connection with the outlet of the preheat tank, a heater located within the boiling tank to boil water thereby generating steam, and an outlet flue extending from the boiling tank through the preheat tank as to condense the steam and preheat the water within the preheat tank, a heat dissipation coil connected with the outlet flue out of the preheat tank, a fan blowing air against the heat dissipation coil, a cool water tank connected with the heat dissipation coil for storing condensed water therefrom, an electrode vertically extending into the boiling tank, electrically isolated from the case of the boiling tank and connected to a positive voltage source, a control circuit electrically connected to each of the electrode, the fan, and the heater for disconnecting the fan and th
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: January 6, 1998
    Inventors: Yueh-feng Wu, Mu-huo Chen
  • Patent number: 5695614
    Abstract: A method for processing waste liquids, having high solids content. The process includes the steps of spraying and evaporating the waste liquid together with a dry gas in a counterflow of dry gas within a spray tower, collecting the solids of the waste water in a lower section of the spray tower, discharging the moist gas from an upper section of the spray tower, and bringing the moist gas in heat exchange with an evaporator of a refrigerating means to condensed the liquid from the evaporator. The cooled dry gas is directed in heat exchange with the condenser of said refrigerating means and heated to be returned in a closed loop to repeat the cycle of operation.
    Type: Grant
    Filed: July 7, 1995
    Date of Patent: December 9, 1997
    Assignee: Winter Umwelttechinik GmbH
    Inventors: Dieter Hording, Claus Hellmann
  • Patent number: 5676800
    Abstract: A distilling apparatus which includes a water chamber to receive cold water from an external water supply source, a heating chamber having an electric heater controlled to heat water to the boiling point, a guide pipe connected between the bottom side of the water chamber and the bottom end of the heat chamber to guide water from the water chamber to the heating chamber, a radiating coil pipe connected to a distilled water drain pipe outside the apparatus, and a steam pipe connected between the steam chamber and the radiating coil pipe and passing through the water chamber to guide steam from the heating chamber to the radiating coil pipe, permitting steam to be condensed into distilled water and heat to be absorbed by water in the water chamber.
    Type: Grant
    Filed: May 14, 1996
    Date of Patent: October 14, 1997
    Assignee: Ping-Hong Chen
    Inventor: Chih Chen
  • Patent number: 5670027
    Abstract: A method of drying a gas making use of the distillation of a liquid desiccant, the method comprising the introduction of a stream of make-up liquid containing water and of an organic solvent miscible with water, the solvent being a more volatile solvent than water under the conditions of the method and forming no azeotropes with water, in an intermediate zone of an elongated vertical contact and fractional distillation zone.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: September 23, 1997
    Assignee: Technip
    Inventor: Henri Paradowski
  • Patent number: 5645693
    Abstract: An apparatus for desalination of sea water by the utilization of solar energy, advantageously accompanied by electric power generation, containing a heat caption unit (1) serving as a heat source, a sea water collecting tank (10), a pre-heating tank (11), a heat receiver (20), and evaporators (2,3,4) connected in line, and distilled water storage tanks (13). The sea water collecting tank (10) and the pre-heating tank (11) that pre-heats the sea water and cools the distilled steam are situated beside each other at different level, and the adjoining walls of the two tanks have an opening for through-flow (11a) or a through-flow tube; the discharge duct (8) of the pre-heating tank (11) is led into the evaporators where the first evaporator (2) is provided with a heater (72) heated by the heating agent, the second and the subsequent evaporators (3) are provided with a heating system consisting of pipe rings (73a) utilizing hot vapor and pipes connecting the pipe rings.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: July 8, 1997
    Inventor: Gabor Gode
  • Patent number: 5622605
    Abstract: A process and apparatus for desalinating seawater or brine and purifying water which contains minerals, salts, and other dissolved solids while simultaneously generating power. The salinous water is heated in a boiler to form steam and a concentrated brine. The concentrated brine is removed from the boiler, the steam produced in the boiler is washed with fresh water to remove trace salts and inorganic materials, and water bearing trace salts and inorganic materials are returned to the boiler. The washed steam is expanded across a turbine to generate electrical or mechanical power which is utilized as a product. The steam exhausted from the turbine is collected and condensed, and one portion of the condensed water is utilized as a fresh water product and another portion of the condensed water is used as the wash water to wash the steam produced in the boiler. Energy efficiency is improved by heat exchanging the hot concentrated brine against the salinous feed water or by flashing the brine to produce steam.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: April 22, 1997
    Inventors: Gary D. Simpson, Karl Lin
  • Patent number: 5600049
    Abstract: In the alkylation of benzene with propylene in a distillation column reactor to produce cumene the overheads from the distillation reactor are fed to a depropanizer where the unreacted benzene is separated from C.sub.3 's. Liquid propylene feed for the distillation column reactor is vaporized by indirect heat exchange with the overheads from the depropanizer to condense the overheads, thereby reducing the pressure in the depropanizer below what would be normally achieved with conventional condensing systems.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: February 4, 1997
    Assignee: Chemical Research & Licensing Company
    Inventor: Angel Sy
  • Patent number: 5597453
    Abstract: A vapor compression distillation/product concentration device includes an evaporator/condenser core, with alternating boiling and condensing chambers with edge manifolds such that substantially the entirety of each plate surface is used as a heat transfer surface. Seals are conveniently formed between adjacent plates by laying a bead of liquid gasketing material such that as the plates are laid atop each other and cured, a waffle-like seal is formed surrounding the contact points between adjacent plates which interlocks the seal with the plates. A truly perpendicular fluid flow is achieved between the alternating boiling chambers and condensing chambers as each fluid traverses the entirety of each chamber in a unidirectional flow as it passes through the evaporator/condenser core.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: January 28, 1997
    Assignee: Superstill Technology, Inc.
    Inventor: Stephan B. Sears
  • Patent number: 5591310
    Abstract: An apparatus for distillation of a liquid near or above its critical point wherein the liquid contains a dissolved solid. The apparatus includes a separation section wherein the liquid may be separated into a vapor and a liquid residue separated by a liquid surface. The apparatus includes a pump for pumping liquid into the apparatus so as to establish and maintain the liquid and vapor in the separation section at a desired pressure and a heat source for heating the liquid and vapor so as to establish a rising temperature profile in the separation section. The pump and heat source are cooperatively controllable for regulating the position of the liquid surface so that liquid residue can be discharged from immediately below the liquid surface.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: January 7, 1997
    Assignee: Grundfos International A/S
    Inventor: Henrik G. Olrik
  • Patent number: 5587054
    Abstract: A vapor compression distillation system including a boiler/condenser assembly wherein a portion of the condensate is redirected back to the condenser inlet to extract superheat from the compressed vapor and transfer it to the liquid in the boiler. The vapor entering the condenser is reduced to a saturation condition to prevent heat build up in the condenser to improve heat transfer efficiency. When the temperature of the incoming feed water is within the operating range of the boiler/condenser assembly, the system is operated under vacuum sufficient to match the boiler temperature with the temperature of the incoming feed water so that no preheater or waste heat recovery exchanges are required.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: December 24, 1996
    Assignee: Grano Environmental Corporation
    Inventor: Robert C. Keith
  • Patent number: 5582691
    Abstract: An improved ocean thermal energy conversion (OTEC) system which includes a novel combined evaporator/condenser. The combined evaporator/condenser further includes a plurality of evaporator spouts and a mist eliminator, wherein the pressure is maintained across the plurality of evaporator spouts. The OTEC system also generates fresh water as a primary product and generates only enough electricity, as a secondary product, to operate the OTEC system itself.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: December 10, 1996
    Inventors: Robert J. Flynn, George J. Cicchetti, Jonathan d'E. Coony
  • Patent number: 5573645
    Abstract: A distillation process and apparatus for recovering high purity aromatic products from a mixed aromatic hydrocarbon feedstock containing benzene, toluene and xylene by use of distillation towers integrated by heat exchange whereby substantial savings in operating costs and apparatus costs are realized. The distillation apparatus includes a benzene distillation tower and heat exchanger, a first toluene distillation tower and external heater, a second toluene distillation tower and heat exchanger and a xylene distillation tower and external heater, whereby the benzene distillation tower and heat exchanger are operably connected to the first toluene distillation tower and external heater and the second toluene distillation tower and heat exchanger are operably connected to the xylene distillation tower and external heater.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: November 12, 1996
    Assignee: Mobil Oil Corporation
    Inventor: John L. Pickering, Jr.
  • Patent number: 5565068
    Abstract: In the multistage distillation of a methyl tertiary butyl ether reaction product comprising methyl tertiary butyl ether, tertiary butyl alcohol, methanol, isobutylene and water, the methyl tertiary butyl ether reaction product is separated in a primary methyl tertiary butyl ether distillation column into a lower boiling methyl tertiary butyl ether fraction and a higher boiling aqueous tertiary butyl alcohol fraction; the lower boiling aqueous tertiary butyl alcohol fraction is separated in a tertiary butyl alcohol distillation column into a vaporized overhead tertiary butyl alcohol fraction and a higher boiling water fraction; cooling water is charged to the reflux condenser for the tertiary butyl alcohol distillation column to liquify the vaporized, overhead tertiary butyl alcohol fraction and to convert the cooling water to wet steam, and the wet steam is independently charged to the reboiler for the primary methyl tertiary butyl ether distillation zone to supply the heat necessary for the distillation to b
    Type: Grant
    Filed: June 16, 1995
    Date of Patent: October 15, 1996
    Assignee: Texaco Development Corporation
    Inventors: Stuart J. Parker, Arlen G. Sliger, Rei-Yu J. Hwan
  • Patent number: 5554264
    Abstract: To heat the circulating reboiler streams of multiple distillation columns a fired reboiler is provided for a first column requiring the most heat. A portion of the bottoms from the first column is passed through the tubes of the heater in the fired reboiler and recycled to the first column as is normal. A slip stream is taken from the recycle after heating and passed on to provide heat by indirect heat exchange to a second reboiler and if desired other reboilers or heat exchangers. The slip stream may then be recycled to the bottoms of the first column directly or to the circulating steam of the first reboiler. A portion of the recycled slip stream can be taken as feed into the second column.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: September 10, 1996
    Assignee: Chemical Research & Licensing Company
    Inventor: Angel Sy
  • Patent number: 5500098
    Abstract: Volatile acids containing metal salt impurities, such as metal pickling solutions-are regenerated by a process in which the acid is subjected to sulfuric acid distillation. Resulting volatile acid vapor is condensed and recycled to the pickle tank, while the residual acid mixture is treated in an acid sorption unit, preferably of the acid retardation type. Acid sorbed in the acid sorption unit is periodically eluted with water and recycled, while metal impurities are rejected in a deacidified by-product solution.
    Type: Grant
    Filed: August 5, 1993
    Date of Patent: March 19, 1996
    Assignee: Eco-Tec Limited
    Inventors: Craig J. Brown, Michael A. Sheedy
  • Patent number: 5457277
    Abstract: To heat the circulating reboiler streams of multiple distillation columns a fired reboiler is provided for a first column requiring the most heat. A portion of the bottoms from the first column is passed through the tubes of the heater in the fired reboiler and recycled to the first column as is normal. A slip stream is taken from the recycle after heating and passed on to provide heat by indirect heat exchange to a second reboiler and if desired other reboilers or heat exchangers. The slip stream may then be recycled to the bottoms of the first column directly or to the circulating steam of the first reboiler. A portion of the recycled slip stream can be taken as feed into the second column.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: October 10, 1995
    Assignee: Chemical Research & Licensing Company
    Inventor: Angel Sy
  • Patent number: 5453165
    Abstract: A system and method for reducing hydrocarbons in wastewater includes an oil separator and a stripper tower. The tower has a housing that includes a stripper section and a condensation section. The stripper section includes a plurality of trays and steam inlet under the trays. The condensation section includes a plurality of trays and a pan tray having provisions to allow vapors to rise from the stripper section.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: September 26, 1995
    Assignee: Atlantic Richfield Company
    Inventor: David E. Bachmann
  • Patent number: 5451300
    Abstract: A process and apparatus for stripping a volatile component from a liquid. The volatile component is destroyed by exothermic reaction with an active component in the gas phase, typically over a catalyst. Heat generated by the reaction of the volatile and active components is transferred to a fluid contact zone in which the organic component is stripped from the liquid stream by a stripping gas. Transfer of heat to the fluid contact zone increases the equilibrium partial pressure of the volatile component in the gas phase and thus increases the driving force for mass transfer in the stripping operation. Preferably, the volatile component is reacted with the active component in a regenerative heat transfer reaction system.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: September 19, 1995
    Assignee: Monsanto Company
    Inventors: Yurii S. Matros, David E. McCombs
  • Patent number: 5445714
    Abstract: A concentrator for reducing the volume of a mixture containing a solvent and various dissolved and/or undissolved solids includes a chamber adapted to receive the mixture and a heater coupled to the chamber for applying heat to the mixture within the chamber, the heat being provided at a temperature sufficient to vaporize the solvent. A condensing tower receives the vapors from the chamber and including a first stage and at least one second stage. A plurality of walls included in each of the first stage and the second stage of the tower direct the vapors along a torturous path including at least one reversal of direction in each of the stages. A coolant is provided to cool the second stage of the tower but not the first stage in order to facilitate condensation of the vapors in the second stage but not in the first stage of the tower. The coolant may include water in order to facilitate the processing of aqueous solutions.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: August 29, 1995
    Assignee: Eco Stills, Inc.
    Inventor: Henry S. Myers
  • Patent number: 5346593
    Abstract: A methanol refining column and method using an intermediate reboiler. Use of the intermediate reboiler reduces methanol production energy requirements. A side stream at or near a fusel oil takeoff point is heated in an intermediate reboiler by a low temperature heating medium (relative to a bottoms reboiler) and returned to the column at or near the fusel oil take-off tray. The take-off tray is operated at 85.degree.-110.degree. C., and 70-90 percent of the reboiler duty is supplied through the intermediate reboiler. The remaining heat load is supplied by a bottoms steam reboiler.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: September 13, 1994
    Assignee: The M. W. Kellogg Company
    Inventors: Edward J. Cialkowski, Thomas P. Ognisty
  • Patent number: 5340443
    Abstract: The invention relates to a distillation apparatus including a housing (1) a blower (2), preheat exchangers (7) and (8) and an evaporative condenser (25) comprising pairs (13) of membranes. One pair (13) of membranes at a time can be detached from the evaporative condenser (25) for replacement. The pairs (13) of membranes are preferably made of plastic or similar material and they hang down loosely in the evaporative condenser.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: August 23, 1994
    Assignee: Aquamax Oy
    Inventors: Tapio M. Heinio, Mauri Kontu
  • Patent number: 5312524
    Abstract: A distillation system for recovery of volatile components of contaminated liquids used in an industrial process includes a tube assembly including outer tubes to which hot bottoms liquids are supplied and inner tubes to which process liquids are supplied for transfer of heat from the bottoms to the process liquids. From the tube assembly the two liquids are discharged into the still through separate, elongated, parallel discharge pipes. The process liquids discharge pipe is positioned above the bottoms liquids discharge pipe and an elongated, metal, angle plate is positioned as an inverted V between the two discharge pipes. Efficiency is improved over prior systems wherein process liquids are added to the still without being preheated by the bottoms fluids, and without the unique still intake manifold.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: May 17, 1994
    Assignee: Filter Tech, Inc.
    Inventor: Lyle B. Barcomb
  • Patent number: 5300197
    Abstract: A distillation apparatus includes a distillation unit for distilling feed water. The distillation unit includes an evaporation part, a condensation part and a hydrophobic porous membrane interposed between the evaporation part and the condensation part, which are integrated with one another. A heating unit for heating the feed water and a cooling portion for cooling distillate produced by distillation of the feed water are provided apart from the distillation unit. One or both of the heating unit and the cooling unit are provided with a heat pump. With this construction, an additional heater does not need to be provided, and the distillation unit and both of the heating unit and the cooling unit can be changed in size and performance independently of each other, so that the overall size of the distillation apparatus can be reduced.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: April 5, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Mitani, Akira Ashida, Katsuya Ebara, Hideaki Kurokawa
  • Patent number: 5286351
    Abstract: A water distiller is provided which is used in conjunction with a hot water heater where normally wasted energy is used to preheat the hot water heater inlet. The distiller includes a heat storage tank, an evaporator tank having a water inlet, a heater and a steam outlet, and a first and second heat exchanger located within the heat storage tank. Steam generated in the evaporator tank passes through the first heat exchanger and condenses, forming distilled water. The heat rejected during condensation is absorbed within the heat storage tank. The second heat exchanger is used to preheat the water flowing to the hot water heater inlet by passing the water through the second heat exchanger on an as needed basis where it absorbs heat from the heat storage tank.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: February 15, 1994
    Assignee: Terrill Designs, Inc.
    Inventor: Michael E. Salmon
  • Patent number: 5275701
    Abstract: A process for the purification and concentration of sulfuric acid contained with nitric acid by-products and organic components pursuant to the mixed acid nitration of aromatics.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: January 4, 1994
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William J. Mazzafro, Stephen I. Clarke, Philip N. Taylor
  • Patent number: 5252187
    Abstract: A method of recovering a solvent from a mother liquor in a system in which the mother liquor also contains non-volatile matter, volatile solute and volatile solvent, and the solute concentration is low, in which a heat pump distilling column (first column) is so operated as to work only as a concentrating section of a distilling column by feeding a mother liquor to the column bottom of the heat pump distilling column, contact of non-volatile matter with the concentrating section is prevented and the column bottom liquor is sent to an evaporator so as to separate the non-volatile matter by the evaporator, thereafter, a vapor from the evaporator is fed to a distilling column (second column), and distillates of first and second columns and bottoms of the second column are withdrawn as the products. The procedures described above are carried out under specific operation conditions.
    Type: Grant
    Filed: July 22, 1992
    Date of Patent: October 12, 1993
    Assignee: Toyo Engineering Corporation
    Inventors: Jun Ohtsu, Kanji Abe, Toshifumi Ida
  • Patent number: 5236558
    Abstract: A method to recycle spent ethylene glycol in a continuous process for the manufacture of polyethylene terephthalate in at least one reactor vessel which includes:a. condensing the overhead vapor of spent ethylene glycol, water and other byproducts from the reactor vessel,b. feeding the condensed vapor to a single distillation column,c. removing only part of the water and other byproducts from ethylene glycol by distillation overhead in the column andd. feeding the resultant bottoms of the column back to the reactor vessel as recycle ethylene glycol along with virgin ethylene glycol, so that polyethylene terephthalate polymer being manufactured by the continuous process is essentially unaffected regarding polymer color and ability to be spun into high quality yarn, but with lower diethylene glycol content that polymer made from all virgin ethylene glycol.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: August 17, 1993
    Assignee: Allied-Signal Inc.
    Inventors: Edward J. Buyalos, David Pendlebury, Lon K. Bouknight, Neil F. Blake, Clarence McKeithan, Jr.
  • Patent number: 5232556
    Abstract: A water desalination apparatus which is constructed of a main housing which includes a condensation chamber and a vapor chamber located above the condensation chamber. Brackish water is to be supplied into the vapor chamber with this brackish water to produce a vapor which is to be removed by a centrifugal compressor arrangement into the condensation chamber. The condensed brackish water from the vapor chamber is to flow through a mass of thin-walled tubes to be eventually discharged into the ambient. The exterior wall of these tubes is located within the condensation chamber and it is on the walls of these tubes that the distilled water vapor is to collect and condense and flow from the condensation chamber to a collection source.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: August 3, 1993
    Inventor: Frank J. Passarelli
  • Patent number: 5227027
    Abstract: A water distillation system and process capable of high efficiency operation used in combination with a heat pump system wherein the water distillation apparatus includes a water pre-heating device positioned within the feed water to heat the feed water to approximately 150 degrees Fahrenheit to facilitate operation of a water evaporator device which vaporizes the water by boiling thereof. Contaminants are removed from this pure water vapor which is at approximately 215 degrees Fahrenheit. The water vapor is passed to a water condenser to provide high purity water at approximately 180 degrees Fahrenheit. The heat pump system provides for refrigerant condensing at approximately 225 degrees Fahrenheit to facilitate boiling of the water in the adjacent water evaporator and includes refrigerant vaporization adjacent the water condenser to facilitate absorbing and reclaiming of the latent heat of the distillate.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: July 13, 1993
    Inventor: Robert T. Topper
  • Patent number: 5217581
    Abstract: A distillation system where a saline fluid (10) is pumped into a pressure vessel (14), through a counterflow heat exchanger (16) and heated to boiling. A salt free distillate (20) is separated from the saline fluid (10). The concentrate valve (24) and the distillate valve (26) restrict egress flow. The concentrate valve (24), the distillate valve (26) and the heater (18) are controlled by a computer control system (32) to attain and maintain a desired value of the Ewing Number. The Ewing Number is a dimensionless measure of performance defined as the heat of vaporization of the distillate (20) at standard atmospheric conditions times the distillate (20) mass flow divided by the system power input.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: June 8, 1993
    Inventor: Frank A. Ewing
  • Patent number: 5215629
    Abstract: A process for separating an aromatic from a mixture containing also nonaroma includes distilling off the nonaromatics from the top of the extractive distillation column as a top product, drawing the aromatic and selective solvent from the extractive distillation column and subsequently separating the selective solvent from the aromatic in a separator column. The extractive distillation column is provided with a separate top product distillation column for recovery of a selective solvent residue from the separated nonaromatics. The entry hydrocarbon mixture is heated prior to admission to the extractive distillation column by an indirect heat exchange with selective solvent drawn from the separator column and heated to a temperature of from 130.degree. to 150.degree. C.The heated entry hydrocarbon mixture is depressurized to form a liquid phase and a vapor phase and these phases are separately fed into the extractive distillation column, the vapor phase entry point being below the liquid phase entry point.
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: June 1, 1993
    Assignee: Krupp Koppers GmbH
    Inventors: Luzian Skatulla, Hans-Christoph Schneider, Hans-Jurgen Vollmer
  • Patent number: 5209828
    Abstract: A system and method of concentrating spent caustic at a refinery has a multi-stage flash drum for separating a spent caustic stream into an overhead output stream including vaporized water and volatile organic compounds, and a concentrated spent caustic output stream. The system also has a condenser for condensing the overhead output stream, and a separator for separating the condensed overhead output stream into a volatile organic compound stream, a liquid hydrocarbon stream and a water stream. The system further has an ejector for applying a vacuum to the flash drum to vaporize the spent caustic stream at a reduced temperature, and to the separator to remove the volatile organic compound stream. The volatile organic compounds are removed from the overhead of the separator through the ejector to a burner of a fired heater.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: May 11, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Tai-Sheng Chou, Manuel Gonzalez
  • Patent number: 5205906
    Abstract: A process is presented for the treatment of wastewater containing non-volatile pollutants and volatile chemically oxidizable organic and inorganic pollutants. The process combines efficient evaporation to concentrate the non-volatile compounds and a catalytic oxidation reaction to convert the volatilized organic and inorganic pollutants. A condensate product may be obtained by treating wastewater according to the inventive process that is of distilled water quality and substantially free of minerals and organics.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: April 27, 1993
    Assignee: Chemical Waste Management, Inc.
    Inventors: James F. Grutsch, George A. Mortimer
  • Patent number: 5171455
    Abstract: Small quantities of one or more liquids having a low boiling point dispersed with a large quantity of one or more immiscible liquids having a higher boiling point are separated in a rapid and efficient manner. A non-reactive gas (nitrogen, helium, air, or combinations thereof) is heated by recycled energy and make-up energy to a temperature above the boiling point of at least one liquid but below that of at least one other liquid. The heated gas is combined with the unheated or preheated liquid-liquid mixture to be separated, and the liquid-gas blend is mixed, heated and distributed by an improved heat exchanger having thermal conductive gas tubing, metal wools and fins) and nebulizer, forming a mist inside a vessel containing a pool liquid of at least one liquid having a boiling point higher than that of at least one other liquid, which pool liquid has been heated with at least a heat pump means to a temperature above the boiling point of at least one liquid but below the pool liquid's own boiling point.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: December 15, 1992
    Assignee: International Environmental Systems, Inc.
    Inventors: Lawrence K. Wang, Roland E. Weber, John J. Pavlovich
  • Patent number: 5169502
    Abstract: An installation for processing liquids having at least one vaporizer used for the process liquid, a condenser arranged downstream from this vaporizer, and a vacuum pump. Additionally, a gas-ring compressor, positioned in the exhaust pipe between the vaporizer and the condenser, presses the vapors from the process liquid through the condenser. The process liquid is vaporized in the vaporizer under a vacuum and the vapors are carried by an exhaust pipe that is connected to the vaporizer through the condenser to the vacuum pump. Also, the process liquid, which is used as the cooling liquid for the condenser, is heated in the condenser and then recycled to the vaporizer.
    Type: Grant
    Filed: November 28, 1990
    Date of Patent: December 8, 1992
    Assignee: Siemens Aktiengesellschaft
    Inventor: Kurt-Willy Mugele
  • Patent number: 5156706
    Abstract: A vertical tube evaporation process for the concentration of saline water and other liquids, including the addition of an anionic mono-molecular dispersant thereto which interacts with materials precipitated during concentration and inhibits the formation of scale or fouling depositions on evaporator surfaces, and wherein the additive is incorporated into the precipitated materials and improves their removal during the descaling or defouling of evaporator surfaces by rendering such precipitates redispersable in fresh water or in a non-saturated liquid used for descaling or defouling of evaporator surfaces.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: October 20, 1992
    Inventor: Hugo H. Sephton
  • Patent number: 5131984
    Abstract: The process for rectification of phenol prepared from crude phenol being the product of decomposition of cumene hydroperoxide and having previously been distilled to remove large portions of acetone, cumene and alpha methylstyrene which includes:feeding the column overhead vapors to a condenser, thereby condensing a major portion of the overhead vapors;withdrawing a small portion of the overhead vapors from the condenser while still in a vapor state, the small portion being relatively enriched in lights and laden with light acids;returning the condensate from the condenser to the phenol distillation column as reflux; andwithdrawing product phenol from at least one-theoretical stage below the top of the phenol distillation column, the product phenol having improved clarity when dispersed in water, clarity being at least 93 percent light transmission as measured by an electrophotometer in a water light test.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: July 21, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Chong H. Chan, William B. Fisher, Joseph D. Shrom
  • Patent number: 5129993
    Abstract: A method for treating manure including the drying of manure by displacing water out of the manure by a carrier liquid, extracting the carrier liquid by evaporation and purifying the carrier liquid vapor for re-use, wherein fats originally present in the manure are released as manure fat, by burning the manure fat in a controlled manner and at least partially using energy thereby released in the process.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: July 14, 1992
    Assignee: MeMon B.V.
    Inventor: Erik D. J. Bleeker
  • Patent number: RE35283
    Abstract: A highly efficient distillation unit is provided for heating water and condensing the generated steam to remove the contaminants from the water. Efficiency is enhanced by providing a compact air cooled fin-and-tube heat exchanger which removes heat from the steam, with a powered blower passing air by the fins. A removable bowl which houses the evaporating water is suspended from a rod biased toward its upper position. Mechanical linkage interconnects the rod and a valve which controls incoming water flow to the bowl. The valve closure member is incrementally moved from an opened position to a closed position as a function of the weight of the water in the heating bowl. A low density electrical heating element is powered with from 40 to 55 watts per square inch of submerged heating element exterior surface. The bowl is configured to have a large surface area of heated water to heater input power, thereby further maximizing efficiency.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: June 25, 1996
    Inventor: Arthur R. Helmich