Indirect Heat Exchange Patents (Class 159/DIG32)
  • 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: 5624530
    Abstract: Spray drying system for drying a liquid feed which is made up of a solution or suspension of particles in a fluid medium. The system enables the spray drying of wet material and converting the material into powder by evaporation of a liquid medium at reduced pressure or at a vacuum. The system includes a heating chamber and an evacuation device, communicating with the interior of the heating chamber. This provision enables creation of reduced pressure within the chamber, accompanied by evaporation of the fluid medium at temperatures lower than needed for evaporation at normal pressure, and evacuation of the moisture vapor generated during evaporation.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: April 29, 1997
    Assignee: Ultrasonic Dryer, Ltd.
    Inventors: Akper Sadykhov, Raphael Semiat
  • Patent number: 5582680
    Abstract: A compact, transportable and self-contained apparatus for treating wastewater containing as impurities and pollutants various non-volatile (at water boiling points) fluids such as greases, oils and soaps, having a vessel/evaporator for receiving the wastewater, a heater below the evaporator to heat the wastewater admixture and boil off the water, a collector to draw off the non-volatile fluids from substantially the entire height of the water evaporator, and automatic refill/shutdown control devices for the apparatus.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: December 10, 1996
    Assignee: Raymond E. Vankouwenberg
    Inventors: Raymond E. Vankouwenberg, Robert D. Gendreau
  • 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: 5575889
    Abstract: Heating elements having internal spaces for a heating medium such as steam are successively submerged and withdrawn from a bath of liquid to be evaporated. Vapor boiling off the outer surfaces of the heating elements can be returned for use as heating medium. The heating elements can be a bundle of elongated tubes or a plurality of plate-type elements rotatable about a common horizontal axis.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: November 19, 1996
    Inventor: Axel E. Rosenblad
  • Patent number: 5558687
    Abstract: A vaporizer (film evaporator) (13) for halide-free, silicon-containing liquid reactants used in producing preforms is provided. The vaporizer includes a plurality of packed-bed columns (22) surrounding a central tube (24). A mixture of liquid reactant, e.g., octamethyl-cyclotetrasiloxane, and gas, e.g., oxygen, is sprayed onto the top surfaces (54) of the columns (22) by a set of spray nozzles (32). The liquid reactant and the gas flow downward together through the columns and are heated by hot oil (28) which flows around the columns' walls (50). The liquid reactant evaporates into the gas until the dew point temperature is reached, at which point all of the liquid reactant will have been converted into vapor. The vapor/gas mixture exits the bottom surfaces 56 of columns (22), where its direction of flow changes from downward to upward. This change in flow direction separates higher molecular weight species (46) from the vapor/gas mixture.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: September 24, 1996
    Assignee: Corning Incorporated
    Inventor: Michael B. Cain
  • Patent number: 5417805
    Abstract: Liquid to be evaporated by the indirect transfer of heat from a heating medium within plate type heat exchange elements is distributed over outer surfaces of the plate type elements by means of one or more brushes mounted for movement over the heating surface. Horizontally and vertically moving brush assemblies are described and shown.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: May 23, 1995
    Inventor: Axel E. Rosenblad
  • Patent number: 5413674
    Abstract: A black liquor process for paper pulping uses a nucleic boiling surface in a series of multi-effective evaporators. The nucleic boiling surface may be used to retube all effects or a single effect.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: May 9, 1995
    Assignee: UOP
    Inventor: Elias G. Ragi
  • Patent number: 5306397
    Abstract: The apparatus is located almost completely under the surface of the sea. The vacua in the de-aeration and the evaporation chambers are generated by a vacuum pump and are maintained by the effects of a pressure reduction device at the inlet for warm seawater and a lifting pump at the outlet for brine. The de-aerator and the evaporator are laid out as heat exchangers and penetrated by heating tubes, which are flowed through passively by warm seawater. The immersion tube forming the steam compartment which is suspended vertically in the sea serves as a condenser. The condenser is cooled passively by cold seawater. The attachment to the bottom of the sea is performed by a single point mooring construction via an anchor chain at an anchor weight. The elevation of the water production unit is controlled automatically by means of an air chamber and an air compressor.
    Type: Grant
    Filed: October 28, 1992
    Date of Patent: April 26, 1994
    Assignee: PI Praktische Informatik GmbH
    Inventor: Edgar Schmidt
  • Patent number: 5248387
    Abstract: An improved process and apparatus for producing concentrated kaolin slurries and spray dried kaolin particulates through the use of an arrangement where an evaporation system for producing concentrated slurries is coupled with a spray dryer such that off gases from the spray dryer are used to supply heat energy to the spray dryer and to the evaporation system.
    Type: Grant
    Filed: February 15, 1991
    Date of Patent: September 28, 1993
    Assignee: Niro A/S
    Inventor: Ove E. Hansen
  • Patent number: 5223088
    Abstract: An improved process and apparatus for producing concentrated kaolin slurries and spray dried kaolin particulates through the use of an arrangement where a system for producing concentrated slurries is coupled with a spray dryer such that off gases from the spray dryer are used to supply heat energy to the spray dryer and to the slurry concentrating system.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: June 29, 1993
    Assignee: NIRO A/S
    Inventor: Ove E. Hansen
  • Patent number: 5195578
    Abstract: An apparatus for heat exchange between a fluid circulating in a tube of heat conductive material and a flow of liquid in a thin layer circulating by gravity in a channel of heat conductive material, in thermal contact with the tube and disposed in the manner of a helix around the tube. The invention has application to evaporation, desorption, condensation, and absorption in chemical and physico-chemical reactors, and especially in air conditioning and refrigeration systems.
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: March 23, 1993
    Assignee: Pechiney Recherche
    Inventors: Pierre Le Goff, Bertrand Clauzade
  • Patent number: 5102503
    Abstract: A system for on-site recovery of reusable industrial waste components, such as solvents, from a liquid waste stream includes a trailer that is internally partitioned to separate system components through which the waste stream passes in a first partitioned section of the trailer from support and control components in the second trailer section. Input waste is fed into a horizontal thin-film evaporator within the first trailer section, while steam is fed in a closed loop through the evaporator from the second section of the trailer for evaporating volatile solvents in the waste stream, and thereby separating the volatile solvents from non-volatile liquid and solid components of the waste stream. The evaporated volatile solvents are fed to a heat exchanger, again enclosed within the first partitioned section of the trailer, for recondensation through heat exchange with a coolant fed to the heat exchanger in a closed loop from the second trailer section.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: April 7, 1992
    Assignee: Environmental Technology Group Corporation
    Inventors: Thomas J. Silinski, Robert A. Walz
  • Patent number: 5084134
    Abstract: A process for the devolatilization of polymer solutions including:(a) feeding the solution to a zone of indirect thermal exchange in which the ratio between the surface of thermal exchange and the flow per hour of the solution is over 80 m.sup.2 /m.sup.3 /h;(b) moving the solution forward into each channel at a speed below 0.5 mm/second;(c) keeping the solution of the polymer in each channel for about 120-200 seconds; and(d) separating the volatile components from the devolatilized polymer solution.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: January 28, 1992
    Assignee: Montedipe S.r.L.
    Inventors: Andrea Mattiussi, Claudio Buonerba, Franco Balestri, Dino Dall'Acqua, Savino Matarrese, Italo Borghi
  • Patent number: 5082525
    Abstract: An improved method of and apparatus rendering water-based fluid waste stream evaporation operations environmentally and otherwise safe, involving separately and independently existing the hot gas stream produced by fuel combustion and the vaporized fluid-air exhaust stream resulting from heat-vaporizing of the fluid, independently directing the streams in opposite directions toward one another and to a common region, and applying fan suction immediately at said region to exert the sole control of withdrawing the streams simultaneously.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: January 21, 1992
    Assignee: Hea Associates, Inc.
    Inventor: Samuel G. Travis
  • Patent number: 4981555
    Abstract: The solutions are concentrated by multiple-effect evaporation in indirectly heated evaporators. The highest concentration of the solution is reached in a final evaporator stage, which is heated with live steam. The final evaporators stage includes two to four falling-film evaporators, all of which are heated with live steam. The falling-film evaporators are consecutively flown through by the solution. Vapor is withdrawn from that falling-film evaporator which is the first to be supplied with the solution and at least part of said vapor is directly contacted with the solution as it flows down through the heating zone of at least one other evaporator of the final stage. From that falling-film evaporator of the final stage which is the first to be supplied with the solution the vapor may be fed to all other evaporators of the final stage.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: January 1, 1991
    Assignee: Metallgesellschaft AG
    Inventors: Klaus Hohmann, Manfred Mai
  • Patent number: 4963231
    Abstract: Process for the evaporative concentration of liquids. Vaporization is carried out by indirect heat exchange with a heating fluid in an evaporator. The vapor produced in the evaporator is thereafter condensed in a condenser by indirect heat exchange with a cooling liquid which is mainly composed of the liquid to be concentrated or the liquid which has already been concentrated in the evaporator. The vapor pressure over the cooling liquid in the condenser may be lowered by causing gas to flow in contact with the cooling liquid.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: October 16, 1990
    Assignee: Ahlstromforetagen Svenska AB
    Inventor: Rolf Ryham
  • Patent number: 4909899
    Abstract: A method of concentrating sludges wherein liquor is heated under pressure indirectly with flue gases from the combustion of previously concentrated sludge, after which the sludge is caused to expand or subjected to reduced pressure which results in evaporation of water and concentration of the sludge to a dry-substance content of over 55%.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: March 20, 1990
    Assignee: A. Ahlstrom Corporation
    Inventor: Erkki J. Kiiskila
  • Patent number: 4894123
    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 1, 1988
    Date of Patent: January 16, 1990
    Inventor: Arthur R. Helmich
  • Patent number: 4872949
    Abstract: Used drilling muds containing substantial quantities of organic liquids and water-soluble salts are treated to render them environmentally acceptable for disposal purposes, by drying the muds to evaporate all liquids, aqueous and non-aqueous, preferably in a shell-and-tube type heat exchanger through which they are conveyed and held in suspension by screw conveyors, and preferably with the vapors thus generated flowing in a direction counter-current to the mud. Water-soluble salts are removed from the dried mud components by dissolving with water, and the vapors are condensed and phase separated for further purification and re-use if desired.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: October 10, 1989
    Inventor: Carl M. Wilwerding
  • Patent number: 4830710
    Abstract: A portable apparatus for on-site clean-up of dirty solvents. An open top liner for receiving dirty solvent is provided in a still housing. A head sits down over the top of the liner to form an enclosed space. Hot heating oil is provided beneath the liner and in the annular space between the liner and the housing. Dirty solvent is placed in the liner and is heated. The solvent vapors are fed to condensation coils for recovery. The heating oil is next removed and then the cap or head is removed and the contaminants are removed from the liner.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: May 16, 1989
    Inventor: Ronald D. Thompson
  • Patent number: 4826575
    Abstract: A laboratory apparatus for continuously producing high purity distilled water includes a distillation flask, a carboy and condenser unit. A double walled microwave oven with a spacing between the walls, large enough to accommodate piping and valving means for controlling the flow of water to the distillation flask. The microwave oven supplies the heat to the system.
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: May 2, 1989
    Inventor: Narbik A. Karamian
  • Patent number: 4789428
    Abstract: The invention relates to a method for evaporation of spent liquor by heat from a blow condenser where blow steam from a pulp cooker is condensed in a direct condenser connected with a hot water accumulator. Spent liquor heated indirectly by hot water from the accumulator is brought to expand and released expansion vapor is used as a heat medium in a following evaporation stage. The apparatus comprises a heat exchanger, at least one flash tank and at least one evaporation unit, the heat exchanger being disposed to receive hot water from the upper part of the accumulator and to return it to its lower part and thus heat the spent liquor, and the flash tank being disposed to receive spent liquor heated in the heat exchanger and to release liquor vapor and spent liquor to the evaporation unit.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: December 6, 1988
    Assignee: Ahlstromforetagen Svenska AB
    Inventor: Rolf Ryham
  • Patent number: 4763488
    Abstract: A heat exchange device which is employed for separating components of different volatility from a solution containing the components and which has particular application as a heat exchanger/rectifier/generator in an absorption cycle refrigeration system. The device comprises a plurality of heat conductive plates which are stacked as laminations in face-to-face heat conductive relationship and a chamber is formed in the plates, the chamber defining a zone into which fluid is directed and in which liquid and vapor phases of the fluid can separate. First, second, third and fourth fluid flow channel regions are formed within the plates.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: August 16, 1988
    Assignee: University of Sydney
    Inventor: Anthony M. Johnston
  • Patent number: 4734159
    Abstract: Apparatus and method for using a heated waste gas stream to evaporate a volatile component such as water or a solvent from a liquid solution comprises a flue to feed the gas stream from the source of heated gas; a container having an inner chamber to hold the liquid for evaporation of the volatile compound and an outer chamber connected to the flue which forms a gas channel substantially surrounding the inner chamber through which at least a portion of the gas stream flows to supply heat to the inner chamber and evaporate the volatile component of the liquid solution; an inlet to feed the liquid solution into the inner chamber; upper and lower liquid level sensors to control the quantity of liquid solution fed into the inner chamber to establish a liquid level therein; a sparger for agitating the liquid solution in the inner chamber; a sump below the container and connected to the flue to receive any condensate from the gas stream and any liquid leaking from the inner chamber; an outlet to combine, vent and d
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: March 29, 1988
    Assignee: TFK Company, Inc.
    Inventor: Theodore F. Korenowski
  • Patent number: 4731159
    Abstract: An evaporator comprises a plurality of substantially parallel plates mounted for rotation about a common axis and in which provision is made for a condensible vapor to flow across a first face of each of said plates and for a liquid, at least a portion of which is to be evaporated, to flow across the second face of each of said plate, which plates are arranged to be rotatable at such a mean acceleration, measured in a radial direction with respect to said axis of rotation, greater than the acceleration due to gravity, said first face of each of said plates has a surface designed to discourage formation of a continuous liquid film thereon. The evaporator may be used to concentrate solutions, e.g. of depleted brine or aqueous caustic soda.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: March 15, 1988
    Assignee: Imperial Chemical Industries plc
    Inventors: John E. Porter, Colin Ramshaw
  • Patent number: 4724048
    Abstract: A water distiller apparatus for purifying and degassing domestic water supplies is provided which is constructed for easy cleaning of all parts and in which inflowing water is preheated by condensing steam within a condenser which preheating allows dissolved gases to dissipate through a vent before the inlet water reaches an evaporator portion. The rate of inflowing water is controlled by a temperature responsive valve that is in thermal communication with the condenser to maximize heat transfer and minimize heat and water loss.
    Type: Grant
    Filed: September 4, 1985
    Date of Patent: February 9, 1988
    Inventor: Arthur R. Helmich
  • Patent number: 4718985
    Abstract: A system for diaphragm distillation of a liquid, for example for desalination of salt water, comprising a diaphragm, through which vapor, but not liquid can pass, and a condensation surface for condensing vapor having passed through the diaphragm, and necessary passageways. According to the invention, the system comprises one or several units, each of which comprises a plurality of pipes located one within the other, viz. a first (1) inner pipe, a second (2) pipe located outside thereof and consisting of a diaphragm of the aforesaid kind, and a third (3) pipe located outside the second (2) pipe, which first (1) and third (3) pipes are of a gas-tight material, that said unit is surrounded by a fourth (4) gas-tight pipe, where a first (5) passageway is formed by the first (1) pipe and a second (6), a third (7) and a fourth (8) passageway are formed between said pipes (1,2;2,3;3,4) in successive order in the direction from the inside outward.
    Type: Grant
    Filed: January 29, 1986
    Date of Patent: January 12, 1988
    Assignee: Svenska Utvecklings AB
    Inventor: Nils Kjellander
  • Patent number: 4710272
    Abstract: An apparatus for distilling a source liquid which utilizes a substantially vertical liquid column. The liquid column is contained by a tubular container closed at the top and open at the bottom. The open bottom of the tubular container is submerged within a source liquid reservoir. The height of the tubular container is greater than the maximum obtainable height for the given density of the portion of source liquid contained within the column. A vacuum is located within the tubular container above the surface of the portion of source liquid contained in the column. In the area of the vacuum, there is located a centrifugal compressor which is to function to move vapor from the vacuum section of the tubular container and compress such along with the transfer of heat to the point that the vapor becomes liquid. This now product liquid is to be removed from the apparatus.
    Type: Grant
    Filed: March 20, 1986
    Date of Patent: December 1, 1987
    Inventors: Frank J. Passarelli, George A. Matsukas, Charles P. Caspary
  • Patent number: 4695349
    Abstract: A process is disclosed for distillation and/or stripping in a column, the lower portion of which is heated and the upper portion of which is cooled. The heating and cooling facilities thereof are coupled with each other by means of a heat pump system. In order to reduce the energy input, the invention provides for driving the heat pump system by means of expansion of a gas or vapor, and with the gas or vapor, after expansion, utilized as the stripping gas in the column.
    Type: Grant
    Filed: March 7, 1985
    Date of Patent: September 22, 1987
    Assignee: Linde Aktiengesellschaft
    Inventors: Hans Becker, Gerhard Linde
  • Patent number: 4687546
    Abstract: A beneficiated kaolin clay slurry is concentrated from a solids content of about 50% to 60% by weight to a solids content of at least 65% by weight by evaporating water therefrom by passing the aqueous clay slurry through one or more non-contact evaporated heat exchangers. The kaolin clay slurry is passed in indirect heat exchange relationship with a heating vapor, with the heating vapor comprising water vapor previously evaporated from the aqueous clay slurry.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: August 18, 1987
    Assignee: Georgia Kaolin Company, Inc.
    Inventor: Mark S. Willis
  • Patent number: 4627890
    Abstract: In a centrifugal mass transfer device comprising a rotary annular permeable element, annular plates are mounted adjacent the radially inner or outer face of the permeable element and gaseous or liquid material flowing from the permeable element across one surface of the annular plates is cooled or heated by a heat exchange fluid on the opposite surface of the plates. In this way condensed or vaporized material is returned to the permeable element.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: December 9, 1986
    Assignee: Imperial Chemical Industries PLC
    Inventors: John E. Porter, Colin Ramshaw
  • Patent number: 4536256
    Abstract: A solvent recovery apparatus including a housing having an open top tank therewithin for receiving a flexible bag. A bag holder member is removably mounted within the bag, and the holder member shapes the bag to hold it in an open condition for receiving dirty solvent directed into the tank. The holder member urges the upper edge of the bag against the inner surface of the tank so that substantially no solvent can migrate into the space between the bag and the tank. The tank has a space for receiving heating oil below a bottom thereof so that heat can be imparted to the contents of the bag to evaporate the solvent therewithin. Baffle structure in the oil causes the oil to circulate as the oil is heated by a resistance heater in the space. A quench coil below the bottom of the tank and above the oil receives a coolant for heating the liquid and solid contaminants left in the bag after evaporation of the solvent to minimize the delay in waiting for the contaminants to cool before removing the bag from the tank.
    Type: Grant
    Filed: July 20, 1983
    Date of Patent: August 20, 1985
    Assignee: Recyclene Products, Inc.
    Inventor: Manuel G. Pastor
  • Patent number: 4497689
    Abstract: Apparatus for carrying out thermodynamic processes in which a work medium undergoes mutually opposite phase transitions. The apparatus comprises casings consisting of confining plates and spacers therebetween, the casings being arranged in stacked relationship. Each casing encloses a plurality of phase transition compartments in superposed relationship. There are orifices in the confining plates through which pairs of phase transition compartments open directly into one another so as to form a number of work chambers. These are also passages delimited by the spacers in the casings for connecting the work chambers in series and passages delimited by the spacers in the casings for introducing and drawing work medium into and from the phase transition compartments. Finally, there are passages delimited by the spacers in the casings for supplying and abducting heat to and from the work medium.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: February 5, 1985
    Assignee: Energiagazdalkodasi Intezet
    Inventors: Laszlo Szucs, Csaba Tasnadi
  • Patent number: 4282259
    Abstract: A method of preparing an extract from hops comprises contacting the hops to be extracted with carbon dioxide in the liquid state to dissolve the matter to be extracted in the liquid carbon dioxide, heating the solution of extract to evaporate carbon dioxide from the solution of extract, compressing and condensing the evaporated carbon dioxide vapor to re-form liquid carbon dioxide, and re-cycling the liquid carbon dioxide to contact the material to be extracted. At least part of the heat evolved from the carbon dioxide vapor after its compression and during its change of state from vapor to liquid carbon dioxide is used to cause the change of state of the liquid carbon dioxide in the solution of the extract to evaporate the carbon dioxide from the solution of the extract.A plant for the preparation of an extract of hops by extraction with liquid carbon dioxide is also disclosed together with modifications of the plant to enhance the recovery of hop oils or to obtain a separate extraction of the hop oils.
    Type: Grant
    Filed: March 7, 1980
    Date of Patent: August 4, 1981
    Assignee: The Distillers Company (Carbon Dioxide) Limited
    Inventors: Alfred G. Wheldon, Peter E. Cockerill
  • Patent number: 4279693
    Abstract: A process for purifying a polluted fluid which comprises heating the polluted fluid and evaporating the components of said polluted fluid which are more volatile while simultaneously concentrating the pollutants into a residue, introducing said residue to a combustion chamber where it is at least partially burned and introducing the heat of combustion as the only source of heat to the evaporation stage of the process.
    Type: Grant
    Filed: September 24, 1976
    Date of Patent: July 21, 1981
    Assignee: Hch. Bertrams Aktiengesellschaft
    Inventors: Hans Kuhnlein, Walter J. Jarosch
  • Patent number: 4014735
    Abstract: In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liquid mixture the more volatile component thereof, the improvement which comprises heating said wall by contact with an inert liquid material, and heating said inert liquid material indirectly through heat exchange with a normally solid molten material. Desirably the wall of inert material is a pipe surrounded by a molten metal in a first annular jacket and a molten salt in a second annular jacket.
    Type: Grant
    Filed: August 15, 1975
    Date of Patent: March 29, 1977
    Assignees: HCH. Bertrams Aktiengesellschaft, Bayer Aktiengesellschaft
    Inventors: Hans Guth, Hans-Joachim Kaiser, Klaus Kleine-Weischede, Hermann Wieschen, Hans L. Kuhnlein
  • Patent number: 3956126
    Abstract: An apparatus for efficiently disposing of combustible organic waste materials, such as organic industrial and household wastes, comprising a macerator and an evaporation unit where liquids are removed from the waste to leave a concentrated organic residue. Evaporation of liquids from the waste is accomplished by heat exchange with a medium heated, in part, by exhaust gases from an internal combustion engine, and in part by incineration of the solid, relatively dry organic residue. The liquids from the evaporation unit are preferably condensed to a suitable liquid form for subsequent use, and the concentrate remaining after liquid evaporation is introduced to a high temperature zone developed in the course of the operation of an internal combustion engine, so that the solid organic residue is incinerated to a relatively small quantity of ash and innocuous gases. Heat for the purpose of partially heating the heat exchange medium used in the evaporation unit is developed in the course of such incineration.
    Type: Grant
    Filed: July 20, 1973
    Date of Patent: May 11, 1976
    Inventors: Leale E. Streebin, Namon A. Nassef
  • Patent number: 3933575
    Abstract: In the processing of a corrosive liquid mixture, such as 50 to 80% aqueous sulfuric acid, by its passage over one surface of a wall of inert heat resistant material, and heating the other surface of said wall, thereby to evaporate from said corrosive liquid mixture the more volatile component thereof, the improvement which comprises heating said wall by contact with an inert liquid material, and heating said inert liquid material indirectly through heat exchange with a normally solid molten material. Desirably the wall of inert material is a pipe surrounded by a molten metal in a first annular jacket and a molten salt in a second annular jacket.
    Type: Grant
    Filed: February 15, 1974
    Date of Patent: January 20, 1976
    Assignees: HCH. Bertrams Aktiengesellschaft, Bayer Aktiengesellschaft
    Inventors: Hans Guth, Hans-Joachim Kaiser, Klaus Kleine-Weischede, Hermann Wieschen, Hans L. Kuhnlein
  • 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