Abstract: A dryer is designed as a closed system in which heated air used to dry the materials is continuously recycled within the drying compartment of the dryer without being discharged to the atmosphere, thus increasing the efficiency of the system while preventing the discharge of contaminated vapors to the atmosphere and also conserving energy which would otherwise be required to heat or air-condition the air drawn into the dryer from the building in which the dryer is located. A regenerative heat exchanger and an atmospheric cooler/condenser are provided in the dryer and condense and remove moisture from the saturated air and transfer the heat of condensation back into the air before the air is reheated and recycled back to the materials to be dried. The drying compartment may comprise an enclosed tunnel through which a rack of superposed trays are conveyed or may comprise some other conveying mechanism.

Abstract: A flexible air duct is connected to a dishwashing unit for conducting hot moist air therefrom. Opposite ends of the duct communicate with the dishwashing unit for conducting condensed water back thereto, while hot air is discharged through an air outlet disposed intermediate the ends of the duct. The duct is of oblong cross-section and includes cooling fins on one side.

Abstract: A drying apparatus for continuous product webs which contain solvents becoming volatile during drying, the drying apparatus has a dryer having means for transporting a treatment medium, an inlet slot and an outlet slot, and nozzle boxes provided at both sides of the inlet slot and the outlet slot, a cooling tunnel directly connected with the dryer, a combustion chamber for thermal combustion of a solvent which becomes volatile during drying, a first heat exchanger and a second heat exchanger, each having a primary side and a secondary side, a fireplace, a waste gas channel extending from the dryer through the secondary side of the first heat exchanger to an inlet of the combustion chamber and then from an outlet of the combustion chamber through the primary side of the first heat exchanger and the primary side of the second heat exchanger to the fireplace, a suction tube extending from the cooling tunnel, a conduit connected with the nozzle boxes through the secondary side of the second heat exchanger provide

Abstract: This invention relates to a heated steam atmosphere drying system comprising dryer in combination with an exhaust recompression system which is extremely energy efficient and eliminates dangers known to air dryers. The system uses superheated steam as the drying medium, which recirculated through the system where its heat of evaporation and heat of compression is recovered, thereby providing a constant source of heat to the drying chamber. The dryer has inlets whereby feedstock and superheated steam are fed therein. High heat transfer and drying rates are achieved by intimate contact of the superheated steam with the particles being dried The dryer comprises a vessel which enables the feedstock and steam to enter recirculate together. When the feedstock becomes dry it will exit the dryer with the steam and become separated from the steam through the use of a curvilinear louver separator (CLS). The CLS enables removal of fine and ultrafine particles from the dryer.

Abstract: The process for low-emission drying of a substance in a drum-type drying installation is suitable in particular for sewage sludge, fish meal and sludges from starch factories, soap factories and paper mills, which substances are preferably to be converted into granules. The process is likewise very suitable for drying biomass products such as wood chips, grass, sugar beet chips and the like, since the emissions are very greatly reduced by means of this process. The drying process is carried out in such a way that no unpleasant odors and dusts are emitted to the outside, because the actual drying circulation is closed. Fossil fuels are used as the heat source for the burner for heating this air stream.

Abstract: The invention concerns a method for the drying of a water-consuming material in a power-plant process. The water-containing material to be dried is introduced into a pressurized dryer (10) and thermal energy is supplied for the drying of the water-containing material. The steam produced in the drying is, at least partly, passed along a separate duct as injection steam into the combustion unit (13) of a gas turbine (14). The invention also concerns a dryer used in the method.

Abstract: A stove for burning corn (maize) including a heat exchanger having an input chamber in which corn is burned, and an output chamber where heat from the burning corn is absorbed in air, which is directed to a conventional grain drying machine for drying the grain therein. Unique arrangements are made for optimizing the quantity of air admitted to the input chamber for combustion, and for making the flow of combustion air uniform across the entire mass of burning corn. An auger is included for feeding corn to the input chamber either from a separate supply vessel, or, in cases where corn is the grain to be dried, from the grain dryer itself.

Abstract: Drying bulk materials such as wood shavings or wood fibers by contacting the bulk materials with a circulating stream of hot vapor produced by the bulk material drying process, the hot vapor being produced by indirect heat exchange with combustion gas from a fuel-burning combustion chamber, and excess vapor as fuel whereby pollutants are burned before the vapor is discharged into the atmosphere.

Abstract: A lint filter having a container provided with a drawer. A fitting is associated with the container for connecting a hose from a clothes dryer and the like to the container while at least one aperture is provided adjacent the fitting for permitting air carrying the lint into the container to escape therefrom, a baffle is disposed within the container in order to form a flow path for the air and lint through a filter causing the lint to adhere thereto. A rotating filter and a stationary wiper blade are means for cleaning the filter.

Abstract: In the drying apparatus for rotary printing press for drying the ink on the printed paper which has a direct fired deodorizing apparatus (8) and a heat recovery apparatus (9) for heating the hot air circulating in a drying apparatus (1) by using the exhaust gas from the deodorizing apparatus, the drying apparatus and its control device are so adapted that a bypass line (20) is installed on the hot air circulation line to bypass the heat recovery apparatus to control the temperature of printed paper and/or the temperature of hot air blowing from nozzles (3) by adjusting the degree of opening of a bypass damper (21) disposed in the bypass line, and the burning amount of the burner for deodorization is controlled so that the deodorizing apparatus furnace temperature corresponding to the blowing hot air temperature (16) or paper temperature (17) is obtained. Further, the control device carries out the control in response to the change in printing speed. Thus, the control responsiveness can be enhanced.

Abstract: This invention refers to a dryer for sugar cane bagasse and/or medulla with vertical type, mobile bed with countercurrent waste combustion gases consisting of: a cylindrical body like a silo. The load is fed into the top of the cylindrical body and is then evenly distributed by spreading devices. Combustion gases from conventional boilers with a high energy content and normally considered as waste are fed countercurrently with the assistance of a ventilator into the bottom of the dryer through slots or holes. Once the gases have picked up humidity while going through the silo, they are expelled through the top by means of a conduct to the boiler's chimney.

Abstract: The shoe dryer of the present invention utilizes the exhaust heat of a clothes drying machine, or the like, to dry articles placed inside the shoe dryer. A duct chamber has a first duct opening in a first region which is connected to the outlet of the drying machine, or the like, to receive the exhaust. The duct chamber also has a second duct opening in a second region of the duct chamber which is connected to an exhaust duct. By selectively adjusting a control door, the exhaust of the drying machine could be directed from the first region of the duct chamber to the shoe drying compartment of the shoe dryer and then to the second region of the duct chamber where it enters the exhaust duct or the exhaust can be directed from the first region of the duct chamber directly to the second region of the duct chamber without going to the shoe drying compartment.

Abstract: This dryer system for concentrated drying of water-damaged building surfaces in typical residential and commercial constructions is temporarily attached during the drying process and is removed after the damaged area is dried. The dryer system comprises a high-volume, forced air blower attached to an air diverter selected from a variety of different diverters configured to attach to various flat surfaces or corners in a room. The blower may operate remotely from the diverter when they are connected by an air duct. The system forces dry air between partitioning studs in walls, through flutes typically found in tongue-in-groove flooring, and similarly behind ceilings. The moisture-laden air leaving the wall, floor or ceiling may be captured with a diverter and duct and dried by a dehumidifier before recirculation back through the system or the air may be ducted outside of the water-damaged area. An air heater can also be combined with the blower to enhance the drying process.

Abstract: A method for enhancing the efficiency of a thermal process such as calcination. The incoming solid particulate material is preheated in the conveyor by partially cooled exhaust vapors from the thermal processor. In passage through the conveyor, the cooled, intermediate temperature vapors contact, fluidize and heat the particulate solids to increase the available throughput of the system.

Abstract: A heat recovery system is disclosed for a pulse combustion drying system in which the exhaust gas of combustion from a pulse combustor passes successively through a dryer, a product collector and a scrubber. The heat of the exhaust gas is recovered in the scrubber by spraying with water or other liquid and transferring by heat exchange the heat absorbed by the water to compressed air, and passing the heated compressed air successively through a membrane heat exchange tube on the wall of the product collector and a membrane heat exchange tube on the wall of the dryer. The air is discharged finally in an air-injection nozzle of the pulse combustor.

Abstract: The present invention provides an apparatus particularly useful for the dehydration of organic materials, and a process of dehydration using the apparatus of the invention. The apparatus includes a drying enclosure to receive and contain materials to be dehydrated, a cooling section with a first stage cooling coil and a second stage cooling coil to remove moisture from a drying fluid by condensation, a heating section with a first stage heating source and a second stage heating source controllable for selecting the amount of heat output therefrom, to raise the temperature and lower the relative humidity of the drying fluid, and a drying fluid handling system to convey the drying fluid in a closed loop through the sections of the apparatus.

Abstract: In a device for recuperating heat from a clothes drier, the combination of a heat exchanger with cross streams comprising a pack of facially opposed heat exchange surfaces defining therebetween a plurality of open ended channels in which a stream of a relatively cold medium - air - is passed through one set of channels in heat exchange relationship with a second air stream from a drier passing through another set of channels, such channels terminating in a surface area corresponding to the hypothenuse section of a triangular corner closed box able to catch fluid from said exchanger, the four boxes at inlets and outlets forming hermetic cells with tight joints and able to separate humid air from dry warm air and including motor means of air circulation.

Abstract: A sludge treating apparatus is disclosed which includes a gas turbine engine generator, an exhaust boiler for generating heated vapor using exhaust heat coming from the gas turbine engine generator, and a dryer for drying a sludge supplied from an external source through the utilization of heated vapor coming from the exhaust boiler, to thereby provide a dried sludge.

Abstract: The invention relates to a process and a device for indirectly heating a flow of gaseous fluid. According to the invention, the flow of fluid to be heated is first subjected to a first heat exchange with combustion products, in a heat exchanger (3), and is subsequently subjected to a second heat exchange with a heat-exchanging fluid circulating in a second heat-exchanger (5). The flow of fluid to be heated is then circulated in a third exchanger (7) where it is subjected to a heat exchange with the combustion products before the latter are used at the time of the first heat exchange. The third heat exchanger (7) can comprise radiating tubes (51) and convection surfaces for heating the flow of fluid in circulation, essentially by convection.

Abstract: A vent bag for a clothes dryer is provided and consists of a pouch with an air filter at its distal end that is releasably secured on a vent pipe of the clothes dryer so that the air filter can catch lint coming out of the vent pipe and recirculate the warm moist exhausted air from the vent pipe for energy conservation.

Abstract: The present invention entails a heat exchanger system for a tobacco curing and drying structure that is designed to utilize the heat associated with exhaust air leaving the structure to heat fresh incoming air being directed into the structure. In particularly, the present invention entails a top mounted heated exchanger system including a pair of laterally spaced counterflow heat exchange modules connected to the barn and to a fresh air transfer duct that leads back into the curing and drying structure. Heated exhaust air is routed through the exchange modules before being exhausted to the atmosphere. Counterflowing, but separated, fresh air traveling through the same heat exchange modules is heated by the exhaust air before being introduced into the curing and drying structure.

Abstract: A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge and a means for controlling odor from the production of said pellets. The system includes a process and apparatus for mixing the dewatered sludge with previously dried recycled particles of said sludge. Drying the mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off-gas. Clarifying said separated solids to separate the pellets of predetermined size, oversized pellets, and undersized pellets and particles, mechanically crushing the oversized pellets and admixing the crushed oversized pellets with the undersized pellets and particles and recycling said mixture for mixture with incoming dewatered sludge to the drier.

Abstract: A method and apparatus for drying sewage sludge includes diverting steam escaping during the drying of the sewage sludge and feeding the steam to a compressor. Thermal energy of the compressed and therefore heated steam is supplied to the sewage sludge to be dried through a heat exchanger system. Condensate is drawn off from the heat exchanger system and collected. Thermal energy of the condensate is supplied to the sewage sludge prior to the drying for reinforcing a preliminary degassing.

Abstract: An energy efficient steam rolled grain mill includes a preheater chamber, a steam chest, a roller mill and a cooler and dryer chamber. The cooler and dryer chamber is in direct head exchange relationship with the preheater chamber.

Abstract: The exterior/interior system for insulating the walls, top, and floor of a typical gas or electric dryer of the type having an interior drum which rotates, and in which electric or gas heat is provided into the drum, for drying the clothes contained within the drum. The two systems would provide a plurality of insulated panels, each of the insulated panels comprising a layer of insulation in the form of a rectangle. The exterior system comprising a durable outer exterior colored surface. Each of the insulated panels conforming to the width and length of the six sides of a dryer, i.e., the side portions, front and rear portions, the top of the dryer and the floor portion of the dryer. There would be further included an insulated panel for placing on the exterior door wall or between the interior-exterior door walls of the dryer, which gives access to the interior drum.

Abstract: A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge. The system includes a process and apparatus for mixing the dewatered sludge with previously dried, recycled particles of said sludge, drying said mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off gas, clarifying said separated solids to separate the pellets of predetermined size, oversize pellets, and undersize pellets and particles, mechanically crushing the oversize pellets and admixing the crushed oversize pellets with the undersize pellets and particles, and recycling said mixture by mixing said mixture with incoming dewatered sludge to the drier.

Abstract: A heat recovery system for at least partially cooling and at least partially cleaning an exhaust stream of hot air from a heating operation which is contaminated with vaporized, condensable liquids and with finely divided particulate solids comprising (a) a first indirect heat exchange means for partially cooling the hot exhaust stream with a fresh stream of cold air to a temperature not significantly above the dew point of vaporized liquids entrained in the hot air stream and for partially heating the fresh stream of air, (b) solids collecting means for centrifugally separating a substantial portion of the finely divided solids from the partially cooled exhaust stream and (c) second indirect heat exchange means for further cooling the exhaust stream to a temperature below the dew point of vaporized liquids initially contained therein to thereby liquefy a significant portion of the vaporized liquids and to further heat the stream of fresh air.

Abstract: A heat recovery unit for use to preheat fresh air with hot air produced in an industrial process, such as the hot air exhaust from a dryer of a pulp and paper mill. The recovery unit makes use of water circulating from one air/water heat exchanger tank to another air/water heat exchanger tank as heat transfer medium. Hot air whose heat is to be recovered at least in part, flows past a set of revolving discs of metal partially immersed in the water flowing in one of the heat exchanger tanks. The portions of the discs which are exposed to the hot air above the water level transfer the heat they recover to the flowing water. The water which is so heated passes into the other heat exchanger tank where it raises the temperature of an identical set of revolving discs which in turn heats a fresh air intake to provide warm air. The main advantage of this recovery unit is that the heat recovery conditions can be easily adjusted to fit any seasonal fresh air change.

Abstract: An apparatus for the drying of shoes and other items utilizing the exhaust heat from a clothes drying machine. The apparatus is connected to the exhaust of a clothes drying machine. The hot air of the exhaust is vented through the body of the shoe dryer to dry items placed therein. Vents are positioned at the top of the shoe dryer to provide control of the temperature of the drying process. The shoe dryer can be mounted atop the clothes drying machine or it maybe wall mounted. The exhaust from the shoe dryer can be vented to the environment as is customary or it may be used to supplement the heating of a home.

Abstract: The invention relates to a suspension heat exchanger for heat exchange between gas and fines. It contains a plurality of cyclone separators which lie one above another with their axes aligned vertically and in which the cover walls and the inlet pipe connections of the substantially straight upper parts of the cyclones are inclined at an acute angle with respect to the horizontal. This contributes to a particularly simple and space-saving overall construction and to a favourable material separation with relatively low pressure loss.

Abstract: An improved clothes dryer characterized by a diffuser located inside the dryer drum for receiving heated air flow and directing the same towards and into intimate contact with wet clothing in the drum at a plurality of locations spaced along the axial length of the drum. Also provided is a dryer temperature control system operative to control the temperature in the dryer drum by maintaining a desired preselected temperature on a steady basis and/or by varying the rate of air flow through the dryer drum; a clogged filter detector operative to generate an output signal indicating a clogged filter in response to the rate of forced air flow through the dryer dropping below a predetermined minimum acceptable level, and a laundry system wherein hot dry attic air is supplied to the dryer while the hot dryer exhaust and drain water from a washer is used to preheat water in a storage tank prior to such water being supplied to a hot water heater.

Abstract: An improved preheater for a clothes dryer delivers hot exhausted air from a dryer through a loop of tubing within a box-like housing for heat exchange with ambient air drawn through the housing. Valving is provided for selectively drawing ambient air to the housing either from conditioned space near the dryer, or from solar-heated attic space. The hottest run of the tubing loop is located downstream in the ambient air flow. In one form the box has a flanged open front for attachment over an air inlet grate located in the rear of a dryer. In another form, the box is separated from the dryer and an adapter is used to carry the preheated air to an air inlet of a dryer.

Abstract: A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge and a means for controlling odor from the production of said pellets. The system includes a process and apparatus for mixing the dewatered sludge with previously dried recycled particles of said sludge. Drying the mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off-gas. Clarifying said separated solids to separate the pellets of predetermined size, oversized pellets, and undersized pellets and particles, mechanically crushing the oversized pellets and admixing the crushed oversized pellets with the undersized pellets and particles and recycling said mixture for mixture with incoming dewatered sludge to the drier. The off-gas from the mechanical separation process is then passed through a condenser to remove some of the water therein, and is routed to an afterburner wherein it is burned.

Abstract: A process is described for combining the disposal of sewage sludge and lime sludge economically by recalcining the lime sludge to product lime for municipal water treatment, and utilizing the excess heat from the recalcining process to dry and pelletize sewage sludge or to supplement the heat required to dry and pelletize said sewage sludge. The sewage sludge pellets then are produced in uniform sizes and have excellent value as a soil conditioner.

Abstract: A rotary-drum dryer for machines for continuous treatment of fabrics, operating by air percussion and air suction, either selectively or in combination, equipped with a set of control elements, able to realize different operating positions, with different distribution of both blown and intake air.

Abstract: A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge. The system includes a process and apparatus for mixing the dewatered sludge with previously dried, recycled particles of said sludge, drying said mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off gas, clarifying said separated solids to separate the pellets of predetermined size, oversize pellets, and undersize pellets and particles, mechanically crushing the oversize pellets and admixing the crushed oversize pellets with the undersize pellets and particles, and recycling said mixture by mixing said mixture with incoming dewatered sludge to the drier.

Abstract: Heated and humidified air is withdrawn by a blower from the apex of a grain elevator or bin and passed through a heat exchanger to preheat fresh air drawn into the grain elevator or bin. A heater raises the temperature of the preheated fresh air and a further blower forces it into the grain elevator or bin to flow in and about the stored grain to draw moisture therefrom. An auger located at the apex of the grain elevator or bin to transport grain into the grain elevator or bin permits filling of the grain elevator or bin during flow of the drying air.

Abstract: The present invention provides a drying cabinet adapted to be connected to a conventional rotary clothes dryer. The drying cabinet of the invention provides a stationary drying zone for drying permanent press and delicate fabrics without wrinkling. Energy savings are thus obtained by utilization of the waste heat from the conventional domestic clothes dryer. The drying cabinet is a free-standing structure with rigid walls and is provided with a horizontal air distributing plate in its lower interior and a vertical baffle which forces hot air entering through the air distributing plate to pass vertically upward through the interior of the cabinet and then vertically downward through a space defined between the vertical baffle and the rear wall of the cabinet. The hot air inlet and outlet for the cabinet are both provided in the rear wall thereof to facilitate connection to the conventional rotary dryer.

Abstract: A solvent recovery system in a low temperature dryer constructed so that hot air is blown into a tumbler housing from a heater, and through a tumbler drum to a cooler in a condenser compressor, a gas evaporator, a gas condenser coil, an expansion valve, and valves and piping provide the circulation of cooled and pressurized refrigerant between the heater and the cooler.

Abstract: An explosion-proof, pollution-free infrared dryer for concentrated vaporization and removal of combustible solvent from a newly coated product, such as a newly printed web of paper, having a pair of opposing infrared radiant heater or burner sources each contained within a combustion chamber having a radiation transmissive wall confronting the infrared source.A drying tunnel for surrounding and passing the newly coated product or web therethrough is located in the ambient room air space between the infrared sources. The drying tunnel preferably is made of radiation transmissive panels to permit irradiation by the infrared source upon the web while yet containing and concentrating the vaporized combustible solvent.A combustion inhibiting atmosphere (CIA) flows through the drying tunnel.

Abstract: Exhaust gases from a heat treatment device operated by a gaseous treatment medium, are cleaned by oxidizing the combustible components of the medium. The exhaust gases already cleaned are used in a first heat exchanger for preheating the gases to be cleaned. The cleaned and heated exhaust gases are then passed through a second heat exchanger for heating a heat carrier medium in a first closed heat carrier circuit connected to the treatment device. The exhaust gases coming from the second heat exchanger are supplied to a third heat exchanger connected to a fourth heat exchanger by a second closed heat carrier circuit for transferring heat to a second carrier medium for heating freshly supplied treatment medium in said fourth heat exchanger.

Abstract: Method and apparatus for drying paper webs continuously manufactured in paper machines, by the use of process steam produced by a two-substance compression heat pump with a solution-circuit.A portion of the thermal energy needed for the drying process is obtained from process steam produced by the heat pump from the waste heat contained in the moist exhaust air of the paper machine, and another portion from preheated ambient air, which is then used for drying the paper web. The ambient air is preheated by using it to cool the rich solution of the heat pump.

Abstract: A system is described for producing small uniform pellets of predetermined size which are substantially free of fines from mechanically dewatered sewage sludge. The system includes a process and apparatus for mixing the dewatered sludge with previously dried, recycled particles of said sludge, drying said mixture in a thermal drier, separating a substantial portion of the dried solids from the drier off gas, clarifying said separated solids to separate the pellets of predetermined size, oversize pellets, and undersize pellets and particles, mechanically crushing the oversize pellets and admixing the crushed oversize pellets with the undersize pellets and particles, and recycling said mixture by mixing said mixture with incoming dewatered sludge to the drier.

Abstract: The invention relates to a method of drying a particulate material which is thereafter to be heat-treated, the material and a gaseous drying medium being brought in contact with each other in a drying apparatus, where water is made to pass from the material to the drying medium by heating. According to the invention a pressure above atmospheric is maintained in the drying apparatus and the drying medium in the drying apparatus is substantially steam. Heating is carried out by means of excess heat generated in the heat treatment.

Abstract: A condensation process and apparatus for water vapor under vacuum which is taken preferably from a drying apparatus. The vacuum is produced by a water ring vacuum pump through which water flows, and the water vapor in the liquid ring vacuum pump is condensed into the liquid. The water is carried in a water circuit with at least one heat exchanger yielding heat from the water for heating purposes. Before flowing into the water ring vacuum pump, the water carried in the circuit is passed through a heat exchanger transferring waste heat from the pump and the pump drive to the water. Heat losses are prevented by a casing of thermal insulation surrounding the pump as well as the heat exchanger.

Abstract: Referring to process and equipment for the indirect drying of sludge, especially for the drying of wastewater sludge, which may undergo previous mechanical dehydration and/or preheating, it is intended to provide a method that permits utilizing low-value energy for drying purposes while avoiding environmental nuisance. With reference to the process, the problem is solved by drying the sludge under vacuum which is produced by withdrawing the water vapor by means of an injection condenser, the equipment provided for solving the problem comprising a barometric condensor associated with a mechanical sludge dehydrator and at least one sludge drier for indirect drying with an hermetically closed sludge space, the gas dome of the sludge space being connected to the injection condenser through a line for withdrawal of the water vapor.

Abstract: A closed intermittent process for drying a moist material, in which process gas is circulated internally for transporting vapour formation heat and water vapour out of the material, the water vapour being condensed from a cooled mixture of gas and water vapour, and for heating the material to be dried. The material is preferably stored in at least two essentially equally large lots (31, 32), each in one essentially gastight chamber (1, 2). Through one lot (31) there is conducted alternately a cooling/drying cycle and a heating cycle of equal duration, the former utilizing a first circulating gas flow (11) cooled by a cooling medium and the latter utilizing a second circulating gas flow (12) heated by a heating medium.

Abstract: Apparatus for the drying of ferrous or non-ferrous turnings or scrap comprises a vertical axis drier (1) in which a drum (2) which encloses a transporter (3) for the turnings in question is mounted transversely. The turnings are heated indirectly via the drum (2) to evaporate their liquid content, while a protective atmosphere is maintained within the drum to prevent oxidation of the material. The vapors leaving the drum (2) are burnt in the drier (1) to heat the material and render the operation of the apparatus self-sufficient. As an alternative the vapors can be treated to recover their oil content, e.g. by distillation.

Abstract: A method of cleaning watery i.e. humid, ventilating air containing liquids which have been gasified during cooling or lubrication of converting machines, particularly rolling mills, comprises cooling of the ventilating air in one or several stages to a temperature below the condensing point of the gasified substances in the ventilating air, so that these substances condense. In connection with the condensation, the larger portion of the condensed cooling or lubricating liquids is separated from the water and reused. The condensed water mixed with the rest of the condensed cooling and lubricating liquids is returned to the cleaned and dried ventilating air and is caused to be absorbed by the ventilating air. By dividing the cooling operation into two steps, the cooling and lubricating liquids can be caused to condense in the first stage without condensation of any water and water can be caused to condense substantially only in the second stage.

Abstract: Heated and humidified air is withdrawn by a blower from the apex of a grain elevator or bin and passed through a heat exchanger to preheat fresh air drawn into the grain elevator or bin. A heater raises the temperature of the preheated fresh air and a further blower forces it into the grain elevator or bin to flow in and about the stored grain to draw moisture therefrom. An auger located at the apex of the grain elevator or bin to transport grain into the grain elevator or bin permits filling of the grain elevator or bin during flow of the drying air.