Abstract: This sludge drying device is characterised in that a gas entraining a mix of sludge and sand is recycled after drying (6) and separation (8) to be compressed (10) and circulate again through the dryer (6) acting as a heat exchange fluid. Compression has been performed to increase the dew point temperature of the gas containing the evaporated moisture, such that the latent heat of evaporation can be recovered by the drying gas. The required operating power can then be much lower than the required power for evaporating the moisture contained in the sludge, because most of this power is recovered.

Abstract: A dryer is provided having a drying chamber for items to be dried and a process air duct in which are located a heater for heating the process air, a blower for driving the process air from the heater through the drying chamber, and a heat exchanger arrangement. Via the heat exchanger arrangement, heat can be withdrawn from the process air flowing away from the drying chamber, and the process air flowing toward the heater can be fed to the heat exchanger. The process air duct is divided into a main duct and a secondary duct, the secondary duct having an evaporator in which condensate that was separated from the process air in the heat exchanger arrangement can be evaporated into the process air flowing therethrough and is connected to the exhaust opening.

Abstract: A dryer with a drying chamber that includes a process air duct for guiding process air through the drying chamber, a heat pump with a heat sink in the process air duct and through which air can flow in an outlet air direction for cooling down the process air, and a heat source arranged in the process air duct and through which air can flow in an inlet air direction for heating up the process air. The outlet air direction and the inlet air direction are substantially parallel to one another. The heat sink and the heat source are in a plane substantially perpendicular to the outlet air direction and to the inlet air direction alongside one another.

Abstract: A method for the effective recovery of as large a portion as possible of the energy in the waste heat of a trough mangle (10) or other launderette machines. To this end, provision is made for a portion of the energy contained in the waste heat to be recovered by cooling the waste heat in a heat exchanger (14), with the waste heat being cooled to such an extent that it falls below the dew point and condenses, with the result that the energy released during condensation and at least a large portion of the energy from the condensate can also be recovered. In this way, it is possible for up to half the residual energy in the moist waste air from a trough mangle (10) and the waste gas from a heating device to be recovered and reused again.

Abstract: Methods and systems are provided for drying wet biosolids to produce a class A biosolids. Generally described, the method of treating biosolids includes drying a wet biosolids in an indirect dryer to produce a partially dried biosolids and drying the partially dried biosolids in a direct dryer in series with and downstream of the indirect dryer to produce a class A biosolids. The indirect dryer and direct dryer may be operated at an average temperature of greater than about 100° C. and may have a total combined residence time of less than about 60 minutes. Also provided are systems for drying wet biosolids including an indirect biosolids dryer and a direct biosolids dryer in series. The methods and systems are particularly effective at reducing the moisture content of the biosolids from greater than 85% to less than 10% by weight.

Abstract: The laundry dryer machine (1) of the present invention comprises a drum (2) wherein laundry desired to be dried are placed, a channel (5) with both ends connected to the drum (2), which provides the cycle air to be circulated in a closed cycle, an evaporator (3) disposed on the channel (5) and which provides the removal of the moisture from the cycle air leaving the drum (2) by condensation, a condenser (4) providing the dehumidified cycle air leaving the evaporator (3) to be heated and a compressor (8) that pumps the refrigerant to the condenser (4) and the evaporator (3).

Abstract: An appliance heat pump dryer is provided that has an accelerated refrigerant cycle for providing heat to the articles being dried. The heat source, such as an electrical heating element, provides heat to the evaporator so that the appliance can reach steady state operating conditions more rapidly and thereby reduce the overall cycle operating time. Options can be provided for the user to select whether the drying cycle will be accelerated.

Abstract: A road dryer delivers heated air to a surface through an adjustable-width nozzle assembly having nozzle boxes designed to provide turbulent flow of drying air. The road dryer includes a combustion system having a high-pressure atomized fuel burner supplied with diesel fuel by a variable frequency drive fuel pump and a closed-loop air temperature control to limit the temperature of the drying air. The combustion system includes a combustion chamber having a cylindrical inner shell housing the burner and a cylindrical outer shell defining an annular space around the inner shell for the flow of process air. The inner shell has an axially elongated exhaust port aligned with an axially elongated outlet opening of the outer shell to achieve mixing of high temperature exhaust gas with process air. The nozzle assembly is vertically adjustable relative to a chassis of the road dryer between a stowed position and an operating position.

Abstract: Disclosed herein is a drying method and system for removing water from biomass material. The method comprising the steps of: (a) heating said biomass material with a heating fluid to release water from said biomass by evaporation, wherein the heating fluid has been heated with heat generated by a chiller condenser condensing refrigerant from a gas phase to a liquid phase; (b) recovering heat from said heating fluid that has been in contact with said biomass in step (a), by thermally coupling the heating fluid to the refrigerant in the liquid phase to thereby evaporate the refrigerant to the gas phase.

Abstract: The present disclosure relates to a heat pump based dryer or a combination washer and dryer device comprising a housing receiving a drum for containing associated articles to be dried by air that flows along a pathway between an outlet and an inlet of the housing. A fluid is provided in the pathway to at least partially remove moisture from the air. A heat pump includes a heat source located at least partially within the pathway and a heat sink being operatively adapted to the heat source to circulate a refrigerant therein. An enclosure at least partially containing the heat sink is arranged to accept the fluid from the pathway to exchange heat with the heat sink and return the fluid to the pathway. Fluid may be provided to the pathway by a spray nozzle adjacent the outlet or by an evaporative media downstream of a lint separator.

Abstract: Energy efficiencies are achieved in a dryer or washer/dryer by selectively varying temperature ranges, time periods, heater power levels, and air flow rates. Efficiency improvements on the order of 16% were obtained over typical constant power, constant temperature, timed drying cycles by varying one or more of these parameters. Efficiencies can also be improved by drawing air from alternative warm sources such as an attic or warm external environment, or by heat recovery from dryer exhaust passages.

Abstract: A method and apparatus for rationalizing the allocation of the heat energy generated from catalytic combustion process for enameling machines wherein a circulating fan is installed above the oven body in a position close to its middle portion; above the front area of the oven body is an organic waste-gas inlet and above which is a primary catalytic chamber. A hot-air allocation chamber is located on the side of the said primary catalytic chamber. The said circulating fan connects the said primary catalytic chamber and the hot-air allocation chamber, delivering the circulating hot air resulting from catalytic combustion into the hot-air allocation chamber which is further connected to the front area, middle area and back area of the oven body via the front air flue, middle air flue and back air flue. With rationalized distribution of heat energy, this invention accelerates the baking speed, thereby improving productivity by 20%.

Abstract: A method and device for drying sheets is described. The sheets are guided through a drier divided into drying chambers and brought in contact with the drying air by means of impinging jet aeration. The impinging-jet aeration utilizes cross-aerated nozzle boxes and the main drying stage exhaust air is introduced in the pressure chamber of one or more drying chambers in the first half of the final drying stage. Pan of the exhaust air in the recirculated-air operation is used for drying in the drying chamber and part of the exhaust air is introduced into the suction chamber of the respective subsequent drying chamber. The exhaust air collectively passes through the final drying stage in this manner, and the exhaust air from one or more drying chambers in the second half of said stage is extracted at a. significantly lower temperature.

Abstract: A laundry machine having a heat exchanger cleaning device may include a cabinet, a drum provided in the cabinet, a heat exchanger for heating air to dry laundry in the drum, air conduits to circulate the air between the heat exchanger and the drum, and a control valve that controls a flow of water to the heat exchanger to clean lint deposits on the heat exchanger. An area of the heat exchanger may be divided into a plurality of regions, such that a first nozzle is coupled to the first outlet port and provided above a first region of the plurality of regions and a second nozzle is coupled to the second outlet port and provided above a second region of the plurality of regions. The control valve may selectively direct the flow of water toward the first nozzle or the second nozzle to clean a desired region.

Abstract: An improvement in a laundry dryer system using recovered waste heat from the hot air exhaust of the dryer to transfer that heat to the incoming ambient fresh air. A home laundry dryer in which both the fresh air entering a laundry drum and the air exhausted from the drum pass through thermal recovery ducting. The dryer heat recovery system has concentric ducting including a high temperature passage through which the exhaust air flows and a separate low temperature passage through which the entering air flows. Heat from the exhausted air is transferred from the high temperature passage to the entering air in the low temperature passage. This heat transfer lowers the energy required to raise the entering air to a desired drying temperature. The dryer ducting is designed to have an outer diameter equivalent to standard size ducting on home dryers.

Abstract: A device for treating a liquid comprising a solvent and a solute, and separating the solvent and solute, the device comprising a continuous flow treatment chamber including: (a) one or more drying zones; (b) one or more return zones to circulate heating fluid continuously through drying zone(s) and return zone(s) sequentially; (c) a heating fluid inlet(s) in at least one of the return zones for the introduction of the heating fluid; (d) a circulating fan to circulate the heating fluid; (e) a liquid inlet(s) in the drying zone(s) including nozzles though which liquid to be treated is introduced in misted form into the zones; (f) a solute collector(s) located in the drying zone(s) downstream of the liquid inlet(s); wherein the introduced liquid is heated by the heating fluid and the solute is separated from the liquid in the solute collector(s).

Abstract: A heat pump system of a laundry dryer comprises a closed refrigerant circuit (10) and a drying air circuit (12). The refrigerant circuit (10) includes a compressor (14), a condenser (16), an expansion device (18) and a main evaporator (20). The air stream circuit includes the main evaporator (20), the condenser (16), a laundry drum and at least one fan (26). The refrigerant circuit (10) and the air stream circuit are thermally coupled by the condenser (16) and the main evaporator (20). The condenser (18) is a heat exchanger provided for heating up the air stream and cooling down the refrigerant. The main evaporator (20) is a heat exchanger provided for cooling down the air stream and heating up the refrigerant. At least one additional evaporator (22) is arranged in parallel to the main evaporator (20), and is switchably connected to the refrigerant circuit (10).

Abstract: A heat pump type clothes dryer compensates for pressure loss caused by a radiator to increase the flow rate of air passing around the radiator, and suppressing introduction of ambient air through gaps formed in air flow lines to avoid degradation in drying capacity, while avoiding an increase in the power consumption or noise of a fan. The clothes dryer includes a drum to accommodate clothes, an air suction or intake line to suck air into the drum, an air exhaust line to exhaust air from the drum, a heat pump circuit including a compressor, a radiator, a pressure reducer, and a heat absorber, where the heat absorber is provided in the air exhaust line, and the radiator is provided in the air suction or intake line, a first blowing mechanism provided in the air exhaust line, and a second blowing mechanism provided in the air suction or intake line.

Abstract: The device according to the invention for drying and torrefaction of at least one carbon-containing material flow in a multiple-hearth furnace substantially comprises a drying zone, which comprises a feed device for feeding a carbon-containing material flow, a discharge point for discharging a drying gas flow containing water vapour and an infeed point for recycling at least a part of the drying gas flow, a torrefaction zone for degassing the material flow dried in the drying zone, which comprises a discharge point for discharging a torrefied material flow, at least one infeed point for an exhaust gas and a discharge point for a torrefaction gas flow, a heat exchanger for heating the drying gas flow, the discharge point of the drying zone being connected via the heat exchanger to the infeed point of the drying zone, a combustion assembly, wherein the discharge point of the torrefaction zone is connected via the combustion assembly and the heat exchanger to the infeed point of the torrefaction zone, wherei

Abstract: A drying apparatus is disclosed that includes a drum and an open-loop airflow pathway originating at an ambient air inlet, passing through the drum, and terminating at an exhaust outlet. A passive heat exchanger is included for passively transferring heat from air flowing from the drum toward the exhaust outlet to air flowing from the ambient air inlet toward the drum. A heat pump is also included for actively transferring heat from air flowing from the passive heat exchanger toward the exhaust outlet to air flowing from the passive heat exchanger toward the drum. A heating element is also included for further heating air flowing from the heat pump toward the drum.

Abstract: Provided are a continuous drying apparatus and method. The apparatus includes a combustion chamber, a heat exchange chamber, a filter, a mixing chamber, and a drying chamber. Biomass to be dried is loaded into an upper end of the drying chamber and falls on a rotating plate at a bottom of the drying chamber. Heated gas from the combustion chamber is mixed with recycled gas output from the drying chamber, and with recycled gas output from the heat exchange chamber, is filtered and is directed to the mixing chamber. Gas circulates within the mixing chamber and is directed into a lower end of the drying chamber at a drying temperature. The biomass loaded into the drying chamber is dried by the gas, and is extracted off the rotating plate.

Abstract: An ink drying apparatus (10) according to the present invention is provided with a gas passage (46) through which a printed material (14) to which ink is attached passes. Further, flow applying unit (48) configured to flow a gas in the gas passage (46) in a predetermined direction, heating unit (60) configured to heat the gas in the gas passage (46), and solvent removing unit (71) configured to remove a solvent in the ink from the gas passage (46) are provided. In the ink drying apparatus (10), the heating unit (60) and the solvent removing unit (71) are associated with each other such that heat can transfer from the solvent removing unit (71) to the heating unit (60) by a heat transmission unit.

Abstract: A dryer and a drying apparatus attachable to a dryer are disclosed. A wheel having desiccant material is located in line and in close proximity with a heating element. The wheel includes a first portion positioned in an inlet air path and a second portion positioned in an outlet air path. The desiccant material removes water molecules from air within the inlet air path, and lowers the vapor pressure of the incoming air. In the outlet air path, heated air flows through the second portion to transfer energy to the desiccant material. The wheel rotates to change the desiccant material within the portions.

Abstract: A heat pump laundry dryer and, more particularly, a heat exchanger that can provide improved efficiency for a heat pump laundry dryer is described. A refrigerant based heating system is used for both heating air to be supplied to a drum containing the articles and for cooling air from the drum so as to condense moisture contained therein. Heat exchange between the suction line supplying refrigerant to a compressor and an outlet line from a gas cooler is provided for improved thermal efficiency.

Abstract: The present invention aims at the rotary drum dryer drying the rolling clothes by the electric heating thermal energy, and a heat exchanging unit with heat recycling function is further installed between the room temperature air flow and the discharged hot air, for preheating the intake air flow by the thermal energy of the discharged hot air through the heat exchanging unit, to reduce the thermal energy loss, moisture is converted into a liquid state via a cooling effect generated through heat exchanging between water-contained hot air and cold air and is collected.

Abstract: Disclosed is a clothes dryer having a heat pump, the clothes dryer capable of enhancing energy efficiency by recovering waste heat to the maximum in correspondence to a capacity of the heat pump, capable of enhancing reliability by preventing overheating of a compressor and a heat exchange means, and capable of shortening drying time. The clothes dryer includes a body, a tub rotatably installed in the body, a suction duct installed at the body, and configured to suck external air and to supply the external air into the tub, an exhaustion duct configured to exhaust air having passed through the tub to outside of the body, and a heat pump having a heat exchange means for recovering waste heat by heat-exchanging air passing through the exhaustion duct, wherein part of the air exhausted via the exhaustion duct is heat-exchanged with the heat exchange means of the heat pump.

Abstract: A laundry dryer includes a rotatable drum, an air delivery system selectively operable to provide air into the drum at a first flow rate and a second flow rate that is less than the first flow rate, and a moisture delivery system operable to provide moisture (e.g., water mist or steam) into the drum while air is being provided at the lower second flow rate, and during drum rotation (tumbling), to thus enhance dispersion of the moisture into the fabrics of the load, and the attendant dewrinkling/refresh benefits. The air delivery system can include a reversible blower that provides air at the first flow rate when operated in a first direction and provides air at the second flow rate when operated in an opposite second direction. The drum can be a reversibly rotatable drum that is rotatable in a first and an opposite second direction, and the dryer can include a drive motor that both rotates the drum and operates the blower.

Abstract: A clothes dryer is provided. In the dryer, air flowing into a drying container is provided with heat from heat pump. The clothes dryer comprises a cabinet, a drying container rotationally mounted in the cabinet, a motor providing the container with rotational force, a first air path connected to a side of the container, a second air path connected to another side of the container and to the outside of the cabinet, a first heat exchanging member for the first air path, and a second heat exchanging member for the second air path. The first air path and the second air path are on the lower part of the cabinet.

Abstract: Disclosed herein is a system for purifying contaminated soil, which restores soil contaminated by a variety of pollutants to the condition before the contamination, and which itself provides the driving source required for the purification. The system includes: a dryer which dries contaminated soil, separates waste gas generated during the drying from the contaminated soil, and discharges the waste gas; a pyrolysis apparatus which indirectly heats the dried contaminated soil in a hermetic condition to divide the contaminated soil into purified soil and pyrolysis gas, and separately discharges the purified soil and the pyrolysis gas; a transfer fan for forcibly transferring the discharged pyrolysis gas; a burner for oxidizing the waste gas discharged from the dryer and the pyrolysis gas forcibly transferred by the transfer fan, to heat the pyrolysis apparatus; and a cooling facility for directly spraying cooling water on the discharged purified soil to cool the purified soil.

Abstract: A laundry machine includes an integrated heat pump system. The laundry machine comprises a cabinet (10). A tub (12) is associated to the cabinet (10). An air line is fluidly connected to the tub and to the heat pump system for air recirculation. A rotatable drum (14) is arranged within the tub (12) and resiliently supported at the cabinet (10) and/or at the tub (12) so that the tub (12) is stationary with respect to the cabinet (10) during operation of the machine, in particular during rotation of the drum (14). At least a part of the components of the heat pump system is supported by the cabinet 10 and/or the tub (12).

Abstract: A laundry dryer comprising a housing and a rotatably mounted laundry drum. A carbon contact holder assembly including a supporting part and includes a receptacle having a longitudinal axis disposed at an angle ? with respect to a perpendicular cross sectional plane of the laundry drum. The supporting part includes an integrally supporting arm extending in a direction of the longitudinal axis of the receptacle. The supporting arm includes an attachment section configured to attach to the housing and a clamp strap configured to hold cables. A carbon contact is disposed in the receptacle and movable against a spring force along the longitudinal axis in a radial direction of the laundry drum. The dryer includes a latching receptacle disposed on the supporting part that includes a plug-in contact connected to the carbon contact by a flexible lead.

Abstract: A drier apparatus for removing water from various materials includes a mixer, drying chamber, separator and regenerator and a method for use of the apparatus. The material to be dried is mixed with a heated media to form a mixture which then passes through the chamber. While passing through the chamber, a comparatively cool fluid is passed generally counter current through the mixture so that the mixture becomes cooler and drier and the fluid becomes hotter and more saturated with moisture. The mixture is then separated into drier material and media. The media is transferred to the regenerator and heated therein by the hot fluid from the chamber and supplemental heat is supplied to bring the media to a preselected temperature for mixing with incoming material to be dried.

Abstract: The present invention refers to a plant for carrying out a process for drying solid organic substances in aqueous phase. The plant includes a turbodrier and a continuous drier connected downstream of said turbodrier.

Abstract: The subject of the invention is a hot gas generator (8), particularly for a dehydration or drying unit, the generator comprising a burner or hearth (9) and being characterized in that it comprises at least one exchange circuit (10) comprising at least one pipe through which the gas to be heated flows, the pipe comprising a cool gas inlet end (11) and a hot gas discharge outlet (12), the pipe having a surface for heat exchange between the combustion gases generated by the burner or hearth (9) and the gas to be heated which flows through the pipe, the pipe also providing a physical barrier between the heated gases and the combustion gases generated by the burner or hearth. Application to producing a drying or dehydration installation.

Abstract: A home laundry drier (1) is provided with a heat-pump assembly (11) having a refrigerant compressing device (15) which is connected to a supporting wall (2b) of the casing (2) via one or more vibration dampers (17) structured for floatingly supporting the refrigerant compressing device (15). At least one of the vibration dampers (17) includes an elastically-deformable hollow body (18), and a central retaining rod (20) which extends through the elastically-deformable hollow body (18). The central retaining rod (20) is axially displaceable between a locking position in which a head portion (20b) of the rod (20) compresses the elastically-deformable hollow body (18) so as to rigidly connect the compressor (15) to the supporting wall (2b) of the casing (2) and a unlocking position in which the elastically-deformable hollow body (18) floatingly supports the refrigerant compressing device (15).

Abstract: An apparatus for retrieving articles from a dryer or otherwise retrieving article from places not easily accessible is described herein. The apparatus comprises a handle with a head attached thereto. The head can be mounted so as to be detachable, swivable, or interchangeable. The handle can be telescoping for further reaching capability or foldable for easy storage. The apparatus can provide illumination as well as be configured to reach into small, various shaped, and otherwise not easy to reach locations.

Abstract: An air distribution system for directing heated air flow emanating or exhausted from a dryer into an area of a house, for increasing the temperature of the area, is provided. The air distribution system includes a housing comprising a top spaced apart from a bottom, and opposing laterally spaced side walls and opposing laterally spaced end walls interconnecting the top and the bottom to define an interior section therein; a pair of openings located in the top and configured to receive a pair of vertical partition members, the pair of vertical partition members extending upwardly from the bottom through the pair of openings in the top defining a plurality of chambers in the interior section; an inlet port located in the bottom for receiving air flow; and a pair of outlet ports located in the opposing laterally spaced end walls for directing the air flow from the interior section.

Abstract: A domestic appliance including an adsorption unit and further including a process air conduit, wherein an adsorption container operates as a heat exchanger for heating a stream of air flowing in the process air conduit and being applied to the adsorption container, with the adsorption unit configured for alternate and reversible operation in a first operating state in which a stream of air flowing in the process air conduit is applied to the adsorption container and which adsorbs adsorptive evaporating in the phase transition container, and in a second operating state in which the adsorbing agent is heated by the heater and the adsorptive is desorbed, with desorbed adsorptive condensing in the phase transition container, the domestic appliance including an assembly operatively associated with the adsorption unit for applying a stream of air flowing in the process air conduit to the adsorption container in the second operating state.

Abstract: Raw meal sludge is dried in a vapor flow dryer by circulating exhaust vapor through a steam circuit which, prior to introduction thereof into the lower part of the dryer, is heated by indirect heat transmission from gaseous flows from a pre-heating system from a gas cyclone of a clinker production line. A partial vapor flow corresponding to water evaporated during raw meal sludge drying is removed from the steam circuit and extracted in the form of a condensate after increasing the vapor temperature by a vapor compressor and the passage of vapor arranged in the dryer over a heating surface of a vapor condenser. The sludge is sprayed into the lower part of the dryer where water is evaporated by the heat of the circulating exhaust vapor and heat from the condenser heating surface. Dried raw meal is separated from the exhaust vapor in a cyclone separator.

Abstract: A domestic appliance for drying a damp product by means of a process air stream that is conducted in a process air channel. The appliance has a treatment chamber that includes the damp product. A cooling assembly cools and condenses the process air stream after it flows through the treatment chamber. A first heat exchanger supplies heat from the process air stream to a working fluid. A heating assembly heats the process air stream before it flows through the treatment chamber and a second heat exchanger supplies heat from the working fluid to the process air stream. The working fluid is conducted in a heat pump that has at least two displacement pistons. The heat pump operates according to a regenerative gas cycle process. At least one of the heat exchangers is substantially asymmetrically and laterally arranged with respect to at least one of the displacement pistons.

Abstract: The invention relates to a dryer for a lacquering facility: a) having a dryer housing, in which heated air is circulated, b) having an exhaust air line for a exhausting exhaust air from the dryer housing; c) having a combustion unit, which is connected to the exhaust air line, and which is used for thermal post-treatment of the exhaust air from the dryer housing and for providing hot air to a heat exchanger; d) wherein said heat exchanger is set up to supply said dryer housing with heated fresh air; and wherein e) at least one heating unit for heating the air circulated in said dryer housing is associated with said dryer housing. It is provided according to the invention that a combustion air supply of the heating unit is connected so it communicates with the dryer housing.

Abstract: Method and apparatus are provided for drying bulk material, especially bark, sawdust, pretreated sludge or a mixture of these. Also provided are a method and apparatus for cooling waste water produced in a pulp or paper production process. Certain embodiments include a pulp mill, paper mill and a novel way of using a wire. Other embodiments provide for cooling in one and the same heat exchanger the waste water produced in a pulp or paper production process while simultaneously heating the gas that cools the waste water. Heated gas extracted from the heat exchanger is conducted through one or several drying conveyers and through the material to be dried that is conveyed on the drying conveyer so as to dry the material with the heated gas.

Abstract: The present invention relates to a heat-pump clothes drying machine, in particular a heat-pump arrangement for removing moisture from and heating up the drying air; said heat-pump arrangement comprises a plurality of separate closed-loop circuits, each one of said separate closed-loop circuits comprising at least one compressor (20, 30; 220, 230; 320, 330), at least one evaporator (22, 32; 222, 232; 322, 332), at least one expansion valve (24, 34; 224, 234; 334, 324), and at least one condenser (26, 36; 226, 236; 336, 326).

Abstract: A process and apparatus used for heating and drying a material. The process uses supplemental radiant heat supplied by circulating thermal oil that is heated using fuels, as well as exhaust heat from other sources. The supplemental heat replaces a portion of the heat provided by the direct-firing. The supplemental heating is achieved by retrofitting existing direct-fired or radiant heat gypsum dryers with thermal oil-to-air heat exchangers in the combustion air lines and the air recirculation lines. Heated thermal oil is circulated through the exchangers, providing supplemental heat to both the combustion air and the re-circulated dryer air. The existing natural gas burners are fired to achieve the desired exit temperature. A Organic Rankine Cycle (ORC) system is coupled to the dryer exhaust vent to recapture heat energy produced by the thermal oil and produce electricity.

Abstract: A dryer having a drying chamber for items to be dried; a process air guide; a fan to deliver an air stream in the process air guide; and a heat pump that has a heat sink and a heat source; wherein the heat sink and the heat source are arranged in the process air guide; and wherein the fan has double pipes.

Abstract: The invention relates to a household appliance 1 comprising a drying chamber 2 for drying wet articles 3 therein, a process air loop 4 for circulating process air to dry the articles 3 and a heat pump 8, 9, 10, 11, 12. Said heat pump 8, 9, 10, 11, 12 comprises a pumping loop 8 containing a pumping fluid to be circulated through said pumping loop 8, an evaporator heat exchanger 9 for transferring heat from the process air into said pumping fluid by evaporating said pumping fluid, a liquefier heat exchanger 10 for transferring heat from said pumping fluid to the process air by liquefying said pumping fluid, a compressor 11 for compressing the pumping fluid and driving the pumping fluid through said pumping loop 8, and a nozzle 12 for decompressing said pumping fluid. Said pumping fluid has a critical temperature between 60° C. and 100° C., and a nominal heat of vaporization at boiling point of at least 220 kJ/kg. Further, said compressor 11 is configured for cooling by said pumping fluid after being compressed.

Abstract: A reagent drying system for use with a steam generation system [25] is described having a combustion chamber that produces exhaust flue gasses [FG2]. A preheater [150] receives the exhaust flue gasses [FG1] and transfers heat to create a heated input air stream [A2] and a diverted air stream [A2?]. The heated input air stream [A2] is provided to the combustion chamber. The diverted air stream [A2?] is provided to a dryer [196] as incremental air stream [IA]. Dryer [196] dries bulk reagents for dry milling into powder. The powder is then used to process the exhaust flue gasses to remove pollutants. The incremental air stream [IA] may also include leakage gasses [360] from preheater [150].

Abstract: The invention includes a method and system for generating electricity using a drive for the electrical generator that is powered by an engine that uses high pressure hot gases produced by combustion of a fuel and an oxygen bearing gas, using at least a portion of the electricity generated to power manufacturing plant equipment and using the waste hot exhaust gases from the heat engine, such as a gas turbine, with or without a heat exchanger, in an oven in which the mat is carried through continuously on a belt, drum or with other conventional means to dry the wet fibrous mats. Optionally the fibrous mats can contain a binder and the hot waste gases can be optionally used to cure a binder.

Abstract: A dryer and a drying apparatus attachable to a dryer are disclosed. A wheel having desiccant material is located in line and in close proximity with a heating element. The wheel includes a first portion positioned in an inlet air path and a second portion positioned in an outlet air path. The desiccant material removes water molecules from air within the inlet air path, and lowers the vapor pressure of the incoming air. In the outlet air path, heated air flows through the second portion to transfer energy to the desiccant material. The wheel rotates to change the desiccant material within the portions.

Abstract: One embodiment of the present invention discloses a process for reducing water content in wood material. The process includes the steps of: feeding the wood material into an overheated vapour filled, oxygen free drying apparatus; indirectly overheating the vapour in the drying apparatus by heating devices, whereby water and other chemical substances vaporise from the wood material into the atmosphere within the drying apparatus; releasing surplus drying apparatus vapour into separation devices which are connected to the drying apparatus; and discharging the dried wood material from the drying apparatus when the moisture content in the wood material has reached a level of less than 10% by weight. One embodiment of the present invention also discloses wood material drying devices to be used in the process.