8834results about "Drying chambers/containers" patented technology

A system for dehydration of organic material comprises a housing structure having an interior chamber, a supply duct, a dual trunk structure, a dry air intake, a central recirculation duct, and a plurality of side recirculation ducts. The side recirculation ducts each have a return plenum extending downward from a top recirculation duct and are configured to recirculate interior air contained in the chamber. The interior air enters the side recirculation ducts through the return plenums and is pushed upward and outward through the top recirculation ducts and back into the interior chamber. The interior chamber has a plurality of exhaust vents positioned in the upper region of its walls. A plurality of portable platforms positioned inside the interior chamber are configured to hold the organic material. The floor of the housing structure can include a plurality of tracks for loading, unloading and positioning the portable platforms.

A surround hot air slow drying device and a three-stage baking method for pet food processing are provided. The surround hot air slow drying device for pet food processing includes a drying box. A hot air drying unit is provided at an inner bottom of the drying box, a circulating conveying unit is provided inside the drying box, a plurality of drying frames are evenly distributed on the circulating conveying unit, a material turning mechanism is provided inside the drying frames, and a positioning component is provided inside the drying box. The material turning mechanism cooperates with the positioning component to turn the raw materials in the drying frames.

A shoe care device includes a cabinet and a door. The cabinet forms an accommodation space and a main opening. The main opening opens the accommodation space in a first direction which is the horizontal direction. The door is configured to open or close the main opening. The cabinet and the door together form the accommodation part. The accommodation part includes an accommodation bottom part, an accommodation extension part, and an accommodation side part. The accommodation bottom part is formed on the upper surface of the cabinet. The accommodation bottom part forms a surface on which an item can be seated. The accommodation extension part is formed on the upper surface of the door. The accommodation extension part has a surface, which is adjacent to the accommodation bottom part and is formed to have the same height as the accommodation bottom part.

A vacuum dryer not requiring a vacuum pump according to an embodiment of the present invention comprises: a drying chamber in which a drying rack is installed, and an exhaust valve communicating with the interior is provided on the outside of the other side; a steam generator located outside the drying chamber, having a water tank, and connected to a steam inlet; and a heat pump interlocked with the inside and outside of the drying chamber and configured by including a condenser provided in a high-temperature area, a first heat exchanger connected to the condenser outside the drying chamber, an evaporator provided in a low-temperature area, a second heat exchanger connected to the evaporator outside the drying chamber, a compressor connecting the first heat exchanger and the second heat exchanger, and an expansion valve connecting the condenser and the evaporator.

The present invention includes a spray drying disposable device for use in a spray drying system. The disposable has a spray drying head and a plasma drying chamber. The head has a spray dry nozzle assembly in fluid communication with the plasma source and the pressurized aerosol gas source. The pressurized gas flows in a vortex pattern that atomizes plasma droplets in the chamber. The head also includes a plenum has uniform air pressure of the drying gas. A baffle plate forms the floor of the plenum having drying gas jets that supply drying gas to the chamber. The atomized plasma droplets evaporate in the presence of the drying gas emitted from the jets to obtain dried plasma particles and humid air. A capture filter captures the dried plasma particles and allows the humid air to pass. The humid air passes through the gas outlet and the exhaust port.

The utility model discloses an acid-proof ceramic tile intelligent continuous drying device which comprises a drying bin and a discharging conveyor, and a first conveyor, a second conveyor and a third conveyor are installed in the drying bin. The acid-resistant tile blank drying device has the beneficial effects that the lifting table and the weighing sensor are arranged, in the hot air drying process, the weight of the acid-resistant tile blank is continuously reduced, when the acid-resistant tile blank moves to the position above the lifting table, the electric push rod extends and pushes the acid-resistant tile blank to move upwards, and then the first electric cylinder, the second electric cylinder, the third electric cylinder and the fourth electric cylinder are shortened; and when the weight reaches a set value, the first electric cylinder and the second electric cylinder extend, so that the acid-resistant ceramic tile blanks incline towards the discharging conveyor, the acid-resistant ceramic tile blanks slide along the balls to penetrate through the cloth curtain to reach the top face of the discharging conveyor and move out of the drying bin, and automatic drying detection and discharging of the acid-resistant ceramic tile blanks are completed. The trouble of manual detection is saved, and the use convenience is improved.

The present invention includes a spray drying disposable device for use in a spray drying system. The disposable has a spray drying head and a plasma drying chamber. The head has a spray dry nozzle assembly in fluid communication with the plasma source and the pressurized aerosol gas source. The pressurized gas flows in a vortex pattern that atomizes plasma droplets in the chamber. The head also includes a plenum has uniform air pressure of the drying gas. A baffle plate forms the floor of the plenum having drying gas jets that supply drying gas to the chamber. The atomized plasma droplets evaporate in the presence of the drying gas emitted from the jets to obtain dried plasma particles and humid air. A capture filter captures the dried plasma particles and allows the humid air to pass. The humid air passes through the gas outlet and the exhaust port.

The invention belongs to the technical field of Tibetan medicinal material processing, and particularly relates to a Tibetan medicinal material vacuum freeze-drying process which comprises the following steps: feeding a loading tray into a freeze-drying bin, and cooling at a speed of 1-2 DEG C / min; when the center temperature of the material reaches-35 DEG C, maintaining for 2-4 hours; a vacuum system is started, and the pressure in the bin is reduced to 10-30 Pa; the initial temperature of the heating plate is set to be-10 DEG C to 10 DEG C; real-time monitoring is carried out through an array type sensor network; vacuum breaking operation; through accurate perception, intelligent diagnosis, robust decision making and self-adaptive regulation and control, the quality problems of collapse, coking, active ingredient degradation and the like of the medicinal materials in the drying process can be effectively prevented, and high quality and high uniformity of a final product are ensured. Meanwhile, by optimizing a drying path, unnecessary energy consumption and time waste are avoided, the economic benefit of the whole production process is improved, and the method is particularly suitable for modern processing of precious Tibetan medicinal materials with extremely high quality requirements.

The invention relates to the technical field of aquatic fish refrigeration, in particular to a refrigeration device and method for aquaculture. The refrigeration device comprises a refrigeration cabinet, a base and a plurality of pneumatic machines, shaking frames corresponding to the pneumatic machines are arranged in the refrigeration cabinet, and filtering sleeve plates are movably arranged in the multiple shaking frames; the refrigeration device comprises a plurality of pneumatic machines, a plurality of shaking frames are arranged in the multiple shaking frames, filtering sliding plates are movably arranged in the multiple filtering sleeve plates, shaking draining mechanisms are arranged between the multiple pneumatic machines and the corresponding shaking frames, and self-cleaning mechanisms connected with the refrigeration cabinet are arranged at the bottoms of the multiple shaking frames. The shaking frame, the filtering sleeve plate and the filtering sliding plate in the refrigerated cabinet can be driven to shake synchronously, so that accumulated fish is dispersed during shaking and drained through holes of the filtering sleeve plate and the filtering sliding plate, the problem that water drops and blood are accumulated on the surfaces of the fish and the bottom of the refrigerated cabinet is solved, and the surfaces of the fish are kept relatively dry; therefore, the stability of the refrigeration effect is improved.

The present invention includes a spray drying disposable device for use in a spray drying system. The disposable has a spray drying head and a plasma drying chamber. The head has a spray dry nozzle assembly in fluid communication with the plasma source and the pressurized aerosol gas source. The pressurized gas flows in a vortex pattern that atomizes plasma droplets in the chamber. The head also includes a plenum has uniform air pressure of the drying gas. A baffle plate forms the floor of the plenum having drying gas jets that supply drying gas to the chamber. The atomized plasma droplets evaporate in the presence of the drying gas emitted from the jets to obtain dried plasma particles and humid air. A capture filter captures the dried plasma particles and allows the humid air to pass. The humid air passes through the gas outlet and the exhaust port.

The invention relates to the technical field of drying, and discloses a solar heat collection tube heating and drying device and a tube row manufacturing method thereof.The solar heat collection tube heating and drying device comprises a first rack, and a first heat collection module is arranged on an inclined mounting platform formed by a first-stage step and a second-stage step of the first rack; a drying cavity defined by first steel plates is installed on the outer wall of the three-stage step of the first rack, and a first partition plate is arranged in the drying cavity. A second partition is arranged on the top surface of the first partition, a third partition is arranged on the side wall of the second partition, and an air delivery pipe is arranged between the third partition and the first partition; an air inlet shutter is mounted on the first steel plate, a fan opposite to the air inlet shutter is mounted on the second partition plate, and an exhaust shutter is mounted on the first steel plate; a supporting beam located above the third partition plate is arranged on the first rack, a footstand is arranged on the supporting beam, and a drying bin used for drying corn is placed on the footstand; according to the device, the solar energy utilization rate is increased through the heat collection structure, heat collection and drying chambers are reasonably partitioned, the airflow circulation path is clear, and stable drying of corn is achieved.

The utility model discloses a drying device for rice processing, which comprises a drying box, a conveying belt and an output belt are respectively arranged on two sides of the drying box, and a first inclined heating plate, a second inclined heating plate and a third inclined heating plate are fixedly mounted in the drying box. The drying device comprises a first inclined heating plate, a second inclined heating plate and a third inclined heating plate, heating assemblies are arranged in the first inclined heating plate, the second inclined heating plate and the third inclined heating plate, the first inclined heating plate is located below the conveying belt, and a spreading and discharging assembly is arranged on the first inclined heating plate. The spreading and discharging assembly is arranged, fallen rice is evenly spread through a spreading plate moving back and forth and slides down from a discharging opening, the situation that the rice is stacked is avoided, and the fallen rice is heated and dried through the arranged heating assembly.

The invention belongs to the technical field of drying devices, and particularly relates to a drying device for traditional Chinese medicine decoction piece production, which comprises a drying device main body, a driving mechanism positioned at the inner bottom of the drying device main body and a rotating mechanism positioned above the driving mechanism, fixing plates are fixedly connected to the opposite sides of the two supporting plates, mounting bases are movably connected to the opposite sides of the two fixing plates through pins, a second motor is fixedly connected to the left side of the supporting plate on the left side, and the output end of the second motor is fixedly connected with the mounting base on the left side. The fixing insertion blocks on the two sides are controlled by the pull rods to move back to back, the mounting blocks are inserted into the mounting bases, the fixing insertion blocks are controlled by the fixing springs to be inserted into the fixing insertion grooves, meanwhile, the limiting balls are extruded by the metal spring pieces to be inserted into the limiting ball grooves for secondary fixing, and fixing mounting of the frame body is achieved; the problem that the drying device placer is troublesome to clean and maintain is solved.

The invention provides an industrial dehydration device and system for powdery chloroprene rubber, and belongs to the technical field of rubber dehydration. The industrial dehydration device for powdery chloroprene rubber comprises a box body and a tank body, the tank body is installed on the surface of the box body, a primary dehydration mechanism is installed on the surface of the tank body and used for carrying out primary dehydration on rubber, the primary dehydration mechanism comprises a filter cartridge, a first rotating shaft and a centrifugal disc, and the filter cartridge is rotatably installed in an inner cavity of the tank body. According to the rubber dewatering device, the primary dewatering mechanism is arranged, a first motor drives a first rotating shaft to rotate, a centrifugal disc can be driven to rotate synchronously through spline teeth and spline grooves, and under meshing of a first gear ring and a tooth groove, a filter cartridge is driven to rotate synchronously to conduct centrifugal dewatering on rubber; the second gear drives the first gear and the material dispersing blade to rotate reversely, so that rubber fed from the feeding bin is smashed to the inner wall of the filter cartridge reversely, accumulation of the rubber is avoided, and meanwhile, the dehydration effect is improved.

The invention belongs to the field of organic fertilizer preparation, and particularly relates to a dryer for preparing organic fertilizer from household garbage, which comprises a drying roller, the front end and the rear end of the drying roller are rotatably connected with roller supporting seats, and the drying roller is connected with a driving mechanism for driving the drying roller to rotate. An air heater used for supplying air into the drying roller is arranged on the roller supporting seat at the rear end of the drying roller. A plurality of raising mechanisms for continuously throwing organic fertilizer raw materials to be dried in the drying roller are uniformly arranged on the inner wall of the drying roller in the circumferential direction of the drying roller; an anti-sticking mechanism used for cleaning materials adhered to the inner wall of the drying roller in a scraping and air blowing mode is further arranged at the position, between every two adjacent lifting mechanisms, of the inner wall of the drying roller. And a crushing mechanism for crushing the thrown organic fertilizer raw materials is also arranged in the drying roller. According to the drying device, the caking condition of the household garbage serving as an organic fertilizer raw material during drying can be effectively reduced, so that the drying efficiency is improved.

The invention relates to the technical field of ultrasonic detection, in particular to an ultrasonic scanning water removal mechanism. Comprising a machine shell, a wind shell is fixed to the middle of the top of the machine shell, a feeding port and a discharging port are formed in the positions, at the two ends of the wind shell, of the top of the machine shell respectively, a feeding baffle and a discharging baffle are slidably connected to the positions, at the feeding port and the discharging port, of the top of the machine shell respectively, and a conveying belt for conveying from the feeding port to the discharging port is arranged in the machine shell. A plurality of vertical downward blowing pipes are arranged in the air shell, the blowing pipes are conical, and the diameter of the upper ends of the blowing pipes is smaller than that of the lower ends of the blowing pipes. The detected jig is placed into the machine shell from the feeding port, and the feeding baffle and the discharging baffle slide to shield the feeding port and the discharging port. The conveying belt conveys the jig to the air shell, the air blowing pipe blows air to the surface of the jig, and water on the surface of the jig is removed. And finally, the jig is taken out from the discharge hole. The diameter of the lower end of the blowing pipe is large, the blowing area is large, and the water removal efficiency is high.

The present invention relates to a novel drying rack device. The device is designed to save time and effort when cleaning and sterilizing instruments, cassettes, tools, and / or accessories. The device comprises a countertop drying rack that sits on a tray. The countertop drying rack comprises a plurality of compartments that can be round and / or flat, with a plurality of drain holes for air drying wet instruments. Further, the tray below the rack collects water runoff for safe disposal and to allow the instruments to air dry. The device keeps instruments and tools organized, different kits separated, allows instruments to dry, and decreases risk of injury and exposure to bloodborne pathogens.

Food waste disposers include a housing, a grinding apparatus mounted inside the housing and configured to grind food waste, and a storage device arranged to store ground food waste. The grinding apparatus includes a grinding case including a discharge hole to allow ground food waste to be transferred to the storage device, a stationary grinder including a plurality of stationary blades coupled to a side wall of the grinding case, a rotary body rotatably coupled to a bottom surface of the grinding case, a first blade extending from the rotary body, the first blade having a first member on a front side and a second member on a rear side with a different shape from each other, and a second blade extending from the rotary body, the second blade having a shape different from a shape of the first blade.

The invention relates to the technical field of drying, in particular to a flash evaporation drying device for cobalt hydroxide production, which comprises a drying cylinder, fan blades, a ceramic ring and a first-stage separation assembly, a drying cavity is formed in the drying cylinder, the fan blades are rotatably arranged at the lower part of the drying cavity, and the fan blades can rotate around the axis of the fan blades; and the ceramic ring is arranged at the upper part of the drying cavity and used for driving the air in the drying cavity to spirally move from bottom to top. The first-stage separation assembly is arranged, materials which are not discharged out of the drying cavity through the pottery ring can fall into the first vortex disc, the materials with different particle sizes are adaptively crushed in the first vortex disc, so that the particle uniformity of the materials entering the drying cavity again from the first vortex disc is improved, and in addition, the larger the particle size of the materials is, the larger the particle size of the materials is, the larger the particle size of the materials is. And the retention time of the materials in the first-stage separation assembly is longer, so that the temperature uniformity of the materials is also improved.

The utility model discloses an organic waste composite dehydration system which comprises a physical dehydration device, a material crushing device and a biological dehydration device, and the material crushing device is connected and installed at the rear end of the physical dehydration device and the front end of the biological dehydration device. And the physical dehydration device comprises an ultrahigh-pressure laminated box type dehydration device or an ultrahigh-pressure laminated belt type dehydration device. The device can meet the requirements of environment-friendly treatment and resource utilization of organic wastes in real production, realizes integration of mechanical and physical dehydration and biological fermentation dehydration, and can be used for recycling the organic wastes without depending on other organic auxiliary materials or greatly reducing the dependence on the other organic auxiliary materials. According to the method, the organic waste with the moisture content of about 80% or even higher can be efficiently, directly and deeply dehydrated to the moisture content of 40% or lower at low cost, the index requirement of resource utilization is met, the treatment cost of the social organic waste is reduced, and the improvement of the social organic waste environment-friendly treatment and resource utilization level is facilitated.

The invention discloses an efficient thermal cycle drying device for producing flaky ammonium bifluoride, and relates to the technical field of ammonium bifluoride production. Comprising a machine body, an exhaust pipe and an air inlet sleeve, a first shell and a second shell are sequentially mounted at the upper end of the machine body from left to right, an air inlet cavity is formed in the bottom of the inner side of the machine body, and a mounting cylinder is connected to the upper end of the air inlet cavity through a spring; through cooperation of a mounting cylinder, a movable cylinder, a scraping plate and a first adjusting assembly, when materials are subjected to traditional one-way vibration blowing heat exchange, the materials are thrown and turned in the other direction to increase the drying uniformity, meanwhile, the air flow pressure of an exhaust hole is correspondingly adjusted, and the heat exchange drying effect is improved; and through cooperation of the movable barrel and the second adjusting assembly, when materials with the large water content and the large feeding amount are dried, the moving speed of the materials is increased, meanwhile, the air flow pressure of the exhaust holes is correspondingly adjusted, and the heat exchange drying effect is improved.

The utility model discloses a medicine raw material drying device which comprises a supporting base, the top of the supporting base is fixedly connected with a supporting box, the interior of the supporting box is rotationally connected with a rotating supporting column, and the outer side of the rotating supporting column is symmetrically and fixedly connected with a plurality of fixing side seats. A storage net barrel is installed on one side of a fixing side base and the top of a supporting side frame, the storage net barrel is installed on one side of the fixing side base, medicine raw materials needing to be dried are stored in the storage net barrel, and hot air is blown to the medicine raw materials in the storage net barrel through an air blowing head for drying treatment, so that all the medicine raw materials are prevented from being stacked together; the condition that part of the medicine raw materials are not thoroughly dried or part of traditional Chinese medicine is burnt during drying is caused, and the stability of the medicine raw materials during drying is influenced.

Apparatus (1) for the heat treatment of articles, comprising a longitudinal casing (2), a convection tunnel furnace (3) positioned longitudinally within the casing (2) comprising a circuit for the production and forced circulation of hot air through said furnace (3), a plurality of stackable trays (4) where the articles can be housed, a conveyor (50) configured to transport at least one row of stacks of the stackable trays (4) through the furnace (3), a first thermal stabilization chamber (51) for the stacks of trays (4) with the articles to be treated communicating with an entrance door (31) of the furnace (3) and a second thermal stabilization chamber (52) for the stacks of trays (4) with the treated articles communicating with an exit door (32) of the furnace (3), comprising means for forced air suction (200) at least from the second thermal stabilization chamber (52) and means for recovery and introduction (210) of the suctioned air inside the furnace (3).

The invention relates to the field of preservative wood treatment devices, in particular to a quick preservative wood drying device which comprises a drying tank body, a drying mechanism, a preservative wood separating and loading mechanism and a frame moving mechanism. Wherein the drying mechanism is mounted at the top of the drying tank main body, a drying part of the drying mechanism extends into the drying tank main body, and the anticorrosive wood separation loading mechanism comprises a hollow bearing frame arranged in the drying tank main body and a plurality of transverse plate clamping grooves formed in the inner wall of the hollow bearing frame. By arranging the hollowed-out loading frame, the partition transverse plates and the partition vertical plates, anti-corrosion wood can be placed in a layered and latticed mode, airflow dead angles and the like caused by excessive stacking of the anti-corrosion wood can be avoided, and therefore it is guaranteed that the anti-corrosion wood is evenly dried, the drying efficiency is improved, and meanwhile the frame body rotating mechanism, the airflow guiding mechanism and the like are arranged in a matched mode, so that the drying efficiency is improved. And the anti-corrosion wood and the loading frame can be rotated, drying airflow can be guided and the like, the drying airflow can be forcibly guided to penetrate through wood gaps, and it is guaranteed that the surface of the wood is evenly heated and the like.

The utility model discloses a multi-layer continuous type automatic heating and cooling baking oven, a plurality of heating units are arranged in series in a bending shape, the upper parts and the lower parts of two sides of heating furnace bodies are respectively provided with feeding ports communicated with a heating cavity, the feeding ports on a pair of adjacent heating furnace bodies are communicated, and the feeding ports on the heating furnace bodies are communicated with the feeding ports on the heating furnace bodies. A second rotating shaft and a first rotating shaft in the vertical feeding mechanism adjacently extend into the heating cavity, the second rotating shaft drives a second supporting rod to reciprocate above and below the horizontal plane where the first supporting rod is located in a rotating state, and the translation feeding mechanism comprises a second driving part and a shifting piece; and the shifting piece is driven to feed the product from one heating cavity to the other heating cavity. The multiple heating units are arranged in the bent shape, a multi-layer structure is formed in each heating unit, a product is heated in the vertical lifting process, the occupied space of equipment is reduced, different temperatures can be set in the multiple heating units, the temperature is increased and then decreased in the arrangement sequence, and the heating process of increasing the temperature and then decreasing the temperature is achieved.

The invention discloses a freezing tank, and belongs to the field of freeze drying equipment. The technical problems that equipment in an existing freeze dryer is short in service life, low in vacuumizing efficiency, high in maintenance cost, limited in operation time and the like are mainly solved. According to the technical scheme, a freezing tank comprises a first freezing tank body, a second freezing tank body, a third freezing tank body, a freezing pipe and a supporting piece, the first freezing tank body is arranged in the second freezing tank body, and the freezing pipe is arranged on the periphery of the first freezing tank body in a surrounding mode; the first freezing tank is connected with the second freezing tank through the freezing pipe, the second freezing tank is arranged in the third freezing tank, and the second freezing tank is connected with the third freezing tank through the supporting piece. The vacuum freeze-drying device is mainly applied to the field of household vacuum freeze-drying equipment.

The invention discloses drying equipment for plastic product production, and belongs to the field of drying equipment.The drying equipment comprises a base, and a sleeve is fixedly mounted at the top of the base; the device further comprises a rolling assembly, the rolling assembly comprises a roller rotationally installed in the sleeve, fixing plates are evenly and fixedly installed in an inner cavity of the roller, through holes are evenly formed in the outer wall of the roller, and a hot air pipe is fixedly installed at the bottom of the base. The top end of the hot air pipe penetrates through the base and the sleeve and extends to an inner cavity of the sleeve, a supporting plate is fixedly installed on one side of the top of the base, and a motor is fixedly installed on the side, away from the roller, of the supporting plate. Plastic particles to be dried can fall from top to bottom in a reciprocating mode and roll over, relative movement between materials is increased, the situation that the materials are partially too dry or not completely dried can be remarkably reduced through the method, the overall drying efficiency is improved, and energy consumption can be reduced.

The utility model relates to the technical field of tungsten filament drawing processing, and discloses a tungsten filament drying and preheating mechanism which comprises a box body with an opening at the upper end, a cover body is arranged at the opening of the box body, and a plurality of heating components distributed in parallel are arranged in the box body; the heating assembly comprises a heat conduction pipe and a plurality of electric heating pipes arranged in the heat conduction pipe, the cross section of the heat conduction pipe is of a C-shaped structure, a wire inlet notch is formed in the upper side of the heat conduction pipe, a C-shaped cavity penetrating through the two ends is formed in the heat conduction pipe, end covers are arranged at the two ends of the C-shaped cavity, the electric heating pipes are arranged in the C-shaped cavity, and the two ends of each electric heating pipe are connected with the end covers respectively; and avoiding gaps are formed in positions, corresponding to the two ends of the heat conduction pipe, on the box body. The heating device has the advantages of being convenient to use and stable and even in heating.

The starch sugar energy-saving drying equipment comprises a fixed table, a driving motor, a roller and a pressure rod, the fixed table is provided with a containing groove, a supporting frame is arranged in the containing groove, a fixed base table is arranged on one side of the supporting frame, a discharging port is formed in the middle of the fixed base table, and a scraping plate is arranged in the discharging port; the two ends of the roller are erected on the supporting frame. In the process that the push disc moves towards the water suction pipe, the water suction pipe sucks out collected condensate water, the push disc moves in the opposite direction, hot air on the upper portion conducts heat to the portion where the condensate water is emptied through a through hole, meanwhile, a one-way valve opening in the lower portion of the push plate and the valve plate are opened under stress, newly generated condensate water is guided in the direction of the water suction pipe, and the condensate water is discharged through the water suction pipe. And the operation is cycled, so that the condensate water is discharged, the condensate water is prevented from absorbing steam heat, the heat conduction efficiency is prevented from being reduced, and the condition that the materials are not dried thoroughly is avoided.