1255 results about "Desiccator" patented technology

The invention relates to a compressed air supply system (100) for a sensor cleaning device (301) with a compressed air connection (1), a compressed air supply connection (2), a pneumatic main line (12) from the compressed air connection (1) to the compressed air supply connection (2) and an air dryer (5, 5.1) arranged in the pneumatic main line (12) for drying the compressed air (120). The invention proposes a water separator (6) arranged in the main line (12) between the compressed air connection (1) and the air dryer (5, 5.1) and a branch line (14, 14.1, 14.2) extending from the pneumatic main line (12) between the water separator (6) and the air dryer (5, 5.1) and reconnecting between the air dryer (5, 5.1, 5.2) and the compressed air supply connection (2), which has a pneumatic branch line switching valve (24, 24.1, 24.2) which in a first operating mode (B1) controls the branch line (14, 14.1, 14.2).2) opens pneumatically in the direction of the compressed air supply connection (2), and the compressed air supply system (100) is configured in the first operating mode (B1) to allow compressed air (141) to return from the branch line (14, 14.1, 14.2). The invention further relates to a compressed air supply system (1200), a vehicle (1000) and a method (2000) for operating a compressed air supply system (1200).

The embodiment of the invention provides an air supply system and an air supply method of an air suspension. The air supply system of the air suspension comprises an air storage tank, a plurality of air springs, an air supply valve body unit, a dryer, a heating element, an electronic control unit and a humidity sensor. The air storage tank is used for storing compressed air; the air spring is used for inputting high-pressure gas to each wheel of the vehicle; the air supply valve body unit comprises a reversing valve; the reversing valve is arranged on an air channel, so that the air supply system is driven to be switched between the air suction mode and the reverse blowing mode through reversing of the reversing valve; the cavity of the dryer is communicated with the air supply valve body unit through an air channel; the heating element is arranged in a cavity of the dryer, the humidity sensor is arranged on the air channel, and the humidity sensor corresponds to the electronic control unit in a signal mode. Therefore, the air supply system of the air suspension has the advantage that the regeneration efficiency of the dryer is improved.

The dryer comprises a dryer shell, an inner cavity of the dryer shell is divided into a drying agent cavity and a heating module wiring cavity which are independent of each other through an end face structure, a heating module barrel sleeve is arranged on the end face structure in a penetrating mode, and the two ends of the heating module barrel sleeve stretch into the two independent cavities respectively. Two air tap connectors communicated with the drying agent cavity are arranged on the outer wall of the dryer shell at intervals, a drying agent drying assembly is arranged between the outer wall, located between the two air tap connectors, of the heating module barrel sleeve and the inner wall of the dryer shell, and a heating body assembly is arranged in the heating module barrel sleeve. A connector assembly is arranged on the outer wall of the dryer shell and used for being connected with an external power source, and the heating body assembly is electrically connected with the connector assembly. According to the invention, related connector design is simplified, product cost is reduced, airtightness failure caused by structural deformation after long-term work of the plastic assembly is avoided, high-efficiency and low-loss heating control can be realized, and system arrangement is more flexible.

The invention discloses a closed multifunctional integrated air supply unit and a suspension system, and the air supply unit comprises a compressor which comprises a motor and a compression pump in transmission connection with the motor; the distribution valve assembly is provided with a distribution gas channel used for guiding gas sent out by the compression pump to needed components. The dryer comprises a dryer shell and a drying agent arranged in the dryer shell, and the dryer is used for drying the gas sent out by the compression pump; the dryer shell is arranged on the motor in a sleeving mode, a drying bin is formed between the dryer shell and the motor shell, and the drying agent is arranged in the drying bin. When the drying agent needs to be regenerated, as the drying bin is formed on the outer side of the shell of the motor, the drying agent can absorb heat generated by rotation of the motor, and the regeneration efficiency of the drying agent can be greatly 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.

A method for operating a dryer appliance includes, after drying articles within the dryer appliance, receiving data corresponding to an activation signal for an extended tumble from a remote user device, tracking a number of cycles for which the extended tumble is not a default setting for the dryer appliance, and automatically adjusting the extended tumble to the default setting for the dryer appliance or transmitting data corresponding to an extended tumble alert based on the tracked number of cycles.

The utility model discloses an environment-friendly municipal sludge drying system, belongs to the field of sludge treatment processes, and is suitable for drying treatment of municipal sludge. The drying system comprises a hot blast stove, a heat exchanger, a condenser, a collector, a dryer and a waste gas treatment device, and can further comprise a high-temperature mixing chamber; the dryer adopts a gas drying mode, a material inlet of the dryer is connected with treated moisture-containing sludge, a gas source inlet is connected with high-temperature drying air, and the moisture-containing sludge is dried by the high-temperature drying air; a material inlet of the collector is connected with a dried material outlet of the dryer, a dried finished product is collected, and low-temperature moisture-containing air is discharged; the condenser condenses the low-temperature moisture-containing air to obtain condensed water and low-temperature dry air; the heat exchanger receives high-temperature hot air and low-temperature dry air to exchange heat in the heat exchanger to obtain waste gas and high-temperature dry air; and the hot blast stove supplies high-temperature hot air to the heat exchanger by introducing cold air and heating. The sludge drying system has the remarkable advantages of high drying efficiency, stable and safe operation, energy conservation, environmental protection, cost saving and the like.

To provide an asphalt plant capable of efficiently consuming concrete sludge by adsorbing carbon dioxide, and an asphalt mixture.SOLUTION: An asphalt plant 1 has a burner for burning a carbon-containing fuel, a dryer having the burner at one end of a drum and heating and drying aggregate containing water by hot air, and an exhaust path for guiding exhaust gas containing carbon dioxide generated in the dryer, dust, and water derived from the aggregate to the outside through a dust collector, an exhauster, and a chimney. A carbon dioxide adsorbent lump 80 obtained by molding a dehydrated cake of concrete sludge into a predetermined shape is installed inside the exhaust path 51 on the upstream side of the dust collector in the exhaust direction. Accordingly, the dust collector collects the sludge powder from which the surface layer of the carbon dioxide adsorbent lump 80 is peeled off due to the contact with the dust contained in the exhaust gas in the exhaust path 51. As a result, the concrete sludge can be efficiently consumed by adsorbing carbon dioxide.SELECTED DRAWING: Figure 6

The utility model discloses a multilayer fluidized bed dryer which comprises a shell, a plurality of layers of air distribution plates are arranged in the shell, the air distribution plates are of a porous structure, partition plates are arranged on the upper surfaces of the air distribution plates to guide flow, and cooling pipelines are installed on the lower surfaces of the air distribution plates to adjust the temperature. A feeding hole is formed in the upper part of the shell, a high-temperature gas inlet is formed in the lower part of the shell, and wet materials and high-temperature gas flow reversely; an active regulation and control means is adopted, cooling pipelines are arranged on one or more bed layers, the temperature of the bed layers is autonomously regulated, and the conditions that the overall temperature field of a large dryer is difficult to regulate, and one or more bed layers are overheated or deviated to set working conditions are overcome; and meanwhile, the problem of equipment shutdown caused by material melting, air distribution plate blocking and bed blocking is solved, and the device is good in stability, capable of running for a long period and suitable for large-scale production.

The utility model relates to a liquid air production device which comprises a raw material air compression system, an air cooling and drying system, a circulating pressurization system, an expansion refrigeration system, a heat exchange cold box and a liquid air storage tank. The raw material air compression system comprises a gas feeding air compressor and an air cooler; the air cooling and drying system comprises a freezing dryer and an adsorption dryer; and the circulating supercharging system comprises a circulating supercharger and a supercharging cooler. According to the production method, efficient production of liquid air is achieved through the steps of multi-stage compression, cooling, drying, pressurization, expansion refrigeration and the like. By optimizing energy utilization, low-temperature air cooling capacity is recycled, compression work and power consumption are saved, and the production cost is remarkably reduced. The device is suitable for the fields of energy storage, metal smelting, precision manufacturing and the like.

The invention discloses a receiver-drier, and belongs to the field of receiver-driers. The receiver-drier comprises a shell and a filter box fixed in the shell, an air outlet and an air inlet are formed in the upper end of the shell; the air outlet is communicated with the inner bottom of the shell through a breather pipe; a plurality of water absorption cavities are uniformly formed in the filter box in the circumferential direction; an upper filter plate is mounted at the upper end of each water absorption cavity; a drying agent is filled in the water absorption cavity; a rotating pipe is rotationally connected in the shell; the upper end of the rotating pipe is provided with an upper air cavity right opposite to the upper end of the water suction cavity. A lower filter plate abutting against the lower end of the filter box is arranged at the lower end of the rotating pipe. A lower air cavity is formed in the lower end of the lower filter plate and located under the upper air cavity; the upper air cavity and the lower air cavity are both communicated with the rotating pipe; a centrifugal impeller is rotationally connected into the upper air cavity; and a heating wire is fixedly connected in the lower air cavity. And through rotation of the rotating pipe, the drying agent in each water absorption cavity is regenerated in sequence.

An air dryer cartridge including a desiccant container and a desiccant contained in the desiccant container is provided. The desiccant container includes a wall forming an oil filter receptacle recessed into the desiccant container. The air dryer cartridge includes an insertion opening for insertion of at least a portion of an oil filter into the oil filter receptacle.

The utility model discloses a polypropylene multi-unit collaborative devolatilization system, which belongs to the technical field of devolatilization in polypropylene production process, and comprises a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit, a polypropylene powder solid-phase devolatilization unit and a polypropylene powder solid-phase devolatilization unit, the extrusion granulation devolatilization unit comprises an extruder and a granulator, an outlet of the powder collecting tank is connected with a feed port of the extruder, and an outlet of the extruder is connected with the granulator; the granule devolatilization unit comprises a hot air drying stock bin, and an outlet of the granulator is connected with an inlet of the hot air drying stock bin; an outlet of the hot air drying bin is used for being connected with a packaging production line. According to the melt devolatilization system disclosed by the utility model, the batch-type vacuum dryer is additionally arranged, so that the modification of a core equipment double-screw extruder is reduced, the process complexity of the melt devolatilization system is obviously reduced, the devolatilization efficiency is improved, and volatile components can be completely removed.

The utility model relates to the technical field of drying filters, in particular to a bidirectional energy-saving refrigerating system drying filter which comprises a shell, a mounting block fixedly connected to the surface of the shell, a sealing cover screwed to the surface of the shell, an electromagnetic vibrator fixedly connected to the surface of the shell, and a storage cylinder fixedly connected to an inner cavity of the shell. The surface of the storage barrel is in lap joint with a baffle, the surface of the baffle is fixedly connected with a filter screen, the two ends of the surface of the baffle are slidably connected with limiting blocks, the limiting blocks abut against the surface of the storage barrel to brake the baffle, and the surface of the baffle is rotationally connected with a hammer block; the dryer has the beneficial effects that the shell and the sealing cover are in threaded connection, the interior of the dryer can be detached and overhauled in time, an electromagnetic vibrator and a hammer block are arranged, the surface of a filter screen can be knocked, blockage caused by attachments on the surface of the filter screen is reduced, the filtering effect and liquidity of the filter screen are improved, and the filter screen and a baffle are detachable; the cleaning and maintenance efficiency of the filter screen is improved, and the maintenance cost and time are reduced.

The invention relates to the technical field of cultural relic exhibition and protection, in particular to a dynamic cultural relic display cabinet based on a mixed reality technology. The display cabinet comprises a cabinet body assembly used for forming a closed cabinet body and placing and displaying exhibition articles, a light assembly used for illumination and illumination adjustment in the cabinet body assembly, a virtual projection assembly used for dynamic observation and display of the exhibition articles in the closed cabinet body, and a monitoring sensing assembly used for monitoring environment data in the cabinet body assembly and controlling the closed environment state. And the networking control assembly is used for uniformly managing all the cabinet body assemblies and accessories thereof in the area. A closed and controllable environment is formed through facilities such as a transparent protective cover, a thermostat and a dryer, cultural relics are effectively prevented from being damaged by environmental factors such as temperature and humidity and dust, the safety of the cultural relics is guaranteed, dynamic three-dimensional display of the cultural relics is achieved through a mixed reality mirror, a projector and a holographic projection cover, immersive and interactive exhibition experience is brought to audiences, and the intellectualization of the cultural relics is achieved. And the exhibition attraction is improved.

The utility model provides refrigeration equipment which comprises an oxygen adjusting module, an oxygen adjusting gas path and an oxygen adjusting chamber, and the oxygen adjusting gas path communicates with the oxygen adjusting module and the oxygen adjusting chamber so that oxygen adjusting gas flow can be conveyed into the oxygen adjusting chamber; and a dryer and / or a humidifier are / is arranged in the oxygen adjusting gas path. According to the refrigeration equipment provided by the invention, the dryer and / or the humidifier are / is arranged in the oxygen adjusting gas path, so that the humidity of the oxygen adjusting chamber can be adjusted and controlled.

The invention discloses a dryer regeneration method, device and system and a storage medium, and the method comprises the steps: detecting an operation stage corresponding to a main program in a process that the main program executes dryer switching regeneration; when it is detected that the main program runs to the pressure relief stage, the main program is controlled to stop running; performing pressure relief operation on the dryer through the auxiliary program; when the pressure relief operation on the dryer through the auxiliary program is completed, cold blowing operation is executed on the dryer through the auxiliary program, and the auxiliary program is used for automatically controlling a pressure relief valve to conduct pressure relief operation on the dryer and automatically controlling a cold and hot regeneration air valve to conduct cold blowing operation on the dryer; and when the cold blowing operation of the auxiliary program on the dryer is finished, the main program is controlled to continue to run, so that the switching operation of the dryer is realized. By adopting the scheme provided by the invention, automatic control of pressure relief and cold blowing operation can be realized.

The invention discloses conveying equipment for preparing a carbon-sequestration potassium humate fertilizer, and relates to the technical field of fertilizers, and the conveying equipment comprises a drying mechanism. According to the conveying equipment for preparing the carbon-sequestration potash humate fertilizer, through the design of the drying mechanism, hot air flow is generated through a dryer, the hot air flow moves towards one side of the drying shell along a connecting pipe, and the hot air flow is conveyed from a grating plate to the inner side of a protective cover, so that the effect of drying the interior of the equipment is achieved, and moisture in the equipment is reduced; the fertilizer surface is prevented from being too humid, the fertilizer is prevented from caking to influence the conveying effect, and the situation that the subsequent cleaning difficulty is increased due to the fact that the fertilizer is adsorbed on the surface of a component due to too humid fertilizer, and the service life of equipment is influenced due to the fact that the corrosion effect is easily increased due to too humid fertilizer is avoided; the grating plate plays a role in blocking fertilizer particles from entering, the ventilation effect is prevented from being affected, the conical block is designed to be of a conical structure, fertilizer flowing is increased through the inclination angle, and the fertilizer adsorption probability is reduced.

The invention relates to the technical field of hydrogen dryers, in particular to a hydrogen dryer and a drying method. According to the hydrogen dryer, the condensation chamber and the drying chamber are arranged in the machine shell, the condensation assembly is installed in the condensation chamber, the drying assembly and the flow guide assembly are installed in the drying chamber, and the vibrator is installed on the flow guide assembly, so that the contact face of hydrogen and a drying agent can be enlarged, and the hydrogen is fully dried; it is ensured that the hydrogen is dry when exhausted from the exhaust pipe, and meanwhile the drying efficiency of the hydrogen can be improved; the drying agent can be circularly dried by arranging the heating assembly, so that the drying efficiency of the drying agent cannot be reduced due to the use frequency of the drying agent, the drying agent is convenient and rapid to replace, the time is saved, the production efficiency is improved, the machine shell ensures no air leakage in the air drying process, the product waste and dangerous accidents are avoided, and meanwhile, the explosion-proof junction box is arranged, so that the production cost is reduced. And the safety is ensured when the heating pipe works.

A coating apparatus 10 for applying a film-forming liquid to a peripheral edge of a board while moving a board and a coating unit 20 relative to each other, wherein the coating unit 20 includes a coating mechanism 21 and an extension mechanism 30, and wherein the coating mechanism 21 has a coating part 22 for applying the film-forming liquid to at least a peripheral edge face of the board, and wherein the extension mechanism 30 has a coating part 22 for applying the film-forming liquid to at least a peripheral edge face of the board. The extension mechanism 30 has an extension part 31 that extends the film-forming liquid applied by the application part 22 to the peripheral edge face and the peripheral upper and lower faces of the board in the form of a thin film, and a force mechanism 34 that forces the extension part 31 toward the peripheral edge face and the peripheral upper and lower faces of the board, and the extension part 31 is configured to be removable without removing the force mechanism 34 from the extension mechanism 30.

The utility model relates to a triple-cycle high-salinity wastewater low-temperature scraper drying system which comprises a roller scraper dryer, a steam condensation chamber, a condensed water tank and a vacuum pump, the vacuum pump vacuumizes the drying cavity through the condensate water tank and the steam condensation chamber. The first heat exchange cycle is suitable for exchanging heat absorbed by the steam condensation chamber to the third heat exchange cycle; the second heat exchange cycle is suitable for exchanging heat of the third heat exchange cycle to the water jacket; and the heat exchange ends on the two sides of the third heat exchange cycle are connected with the first heat exchange cycle and the second heat exchange cycle correspondingly. The three heat exchange cycles work cooperatively, the heat of the first heat exchange cycle is reduced, the heat provided for the second heat exchange cycle by the third heat exchange cycle is reduced, and the hot water in the second heat exchange cycle can still heat the materials in the drying cavity by exceeding the boiling point rise through the auxiliary heat, so that the low water content of the dry materials is effectively ensured.

The utility model belongs to the technical field of dryers, particularly relates to a dryer, and aims to solve the problems that the contact area of hot air and materials in an existing cabin body is small, and the hot air directly blows the materials after entering the cabin body, so that the materials are softened and caked, the drying effect is influenced, and the blanking speed and the product quality of the materials are influenced. The bottom end of the charging barrel is conical, a valve used for controlling discharging is arranged at the bottom of the charging barrel, an observation window is arranged on the outer side of the charging barrel, a top plate is detachably arranged on the top of the charging barrel, and a feeding hole used for feeding is formed in the top of the top plate. The overlap ratio of the air holes can be adjusted through the air pipe and the outer pipe, hot air is further evenly dispersed in the charging barrel in a rotating mode, the dispersing head is arranged at the tail end of the air pipe, hot air can be dispersed more evenly at the bottom, and it is prevented that the hot air directly blows materials at the bottom, and the materials at the bottom are softened and agglomerated; therefore, the work efficiency of material drying is improved, and the product quality is guaranteed.

The present invention relates to the technical field of the preparation of Cr3+-doped fluorescent materials. Disclosed are the preparation of a Cr3+-doped fluorescent material and the use thereof in a plant light supplement lamp. The preparation comprises the following steps: weighing a matrix raw material and a Cr3+-containing raw material according to the stoichiometric ratio, and respectively grinding and then storing same in a dryer; placing the raw materials into a ball milling tank, and subjecting same to planetary ball milling for 3-6 hours; transferring same to an alumina crucible, and pre-sintering same for 2-5 hours; after secondary ball milling, adding a fluxing agent thereto; placing same in a high-temperature furnace and sintering same for 6-10 hours, and furnace cooling same or cooling same under the protection of an inert gas; and firstly coarsely crushing same, then grinding same to 10-30 μm, alternately cleaning same with deionized water and ethanol, drying same in an air dry oven, detecting and screening the product by using a fluorescence spectrophotometer, an X-ray diffractometer and a scanning electron microscope, and remanufacturing unqualified products after adjusting process parameters according to detection results. The present invention has a high light-emitting efficiency, and the spectrum thereof is suitable for plant photosynthetic absorption. When being applied to a light-supplementing lamp, plant growth can be promoted, the plant height and the chlorophyll content are significantly increased, and the natural spectrum is simulated, such that the material is suitable for multiple cultivation scenarios.

The invention discloses an air suspension dryer, and aims to solve the problems that the sealing effect is poor in the heating process of a traditional dryer, and the sealing performance and the heating effect of the dryer are affected. The air suspension dryer comprises a dryer body, a heating assembly and a heat insulation cover, and the dryer body and the heating assembly are located in the heat insulation cover; the heating assembly comprises a first insulating layer, a heating resistance layer and a second insulating layer, the first insulating layer, the heating resistance layer and the second insulating layer are sequentially arranged on the outer side of the dryer body, the heating resistance layer is connected with an external circuit, and a gap is formed between the second insulating layer and the heat insulation cover. The heating assembly is directly sintered or attached to the outer side of the dryer body, and the heating function and the drying function are highly integrated. The external heating assembly can prevent the initial structure of the dryer body from being changed, and the sealing performance of the dryer body is ensured. The general arrangement design is facilitated, and meanwhile, the production and assembly cost can be reduced.

The utility model discloses a hydrogen dryer of a hydrogen preparation system in the technical field of hydrogen dryers, which comprises a hydrogen dryer, a controller arranged on the right side wall of the hydrogen dryer, a gas inlet pipe arranged below the left side wall of the hydrogen dryer in a penetrating manner, an exhaust hood arranged above the inside of the hydrogen dryer, and a gas outlet pipe arranged at the top of the hydrogen dryer in a penetrating manner, a flow dividing assembly is arranged below the inner wall of the hydrogen dryer, two sets of drying boxes are arranged on the inner wall of the hydrogen dryer, drying holes are evenly formed in the outer side walls of the two sets of drying boxes, and the two sets of drying boxes are filled with activated carbon drying agents. Under the cooperation of the drying box, the feeding pipe, the discharging pipe and the sealing assembly, an activated carbon drying agent in the drying box can be conveniently replaced, when the drying effect of the activated carbon drying agent becomes poor, the activated carbon drying agent is rapidly replaced, and the drying effect of hydrogen is improved.

The utility model belongs to the technical field of compressed air supply, and particularly relates to an instrument purification compressed air supply system, which comprises a normal supply unit and an emergency supply unit, and is characterized in that the emergency supply unit comprises a screw air compressor, a high-efficiency degreaser, a micro-heat regeneration air dryer and a second dust fine filter which are connected in sequence; an outlet of the second dust fine filter is communicated with an outlet of the first dust fine filter, and emergency supply for the purified compressed air storage tank for the instrument is completed; a first bleeder and a second control valve are arranged on a pipeline between the screw air compressor and the efficient degreaser, and a first control valve is arranged on the first bleeder; a second diffusing pipe is arranged on a pipeline between the micro-heat regeneration air dryer and the second dust fine filter, a third control valve is arranged on the second diffusing pipe, and a fourth control valve is arranged on an outlet pipeline of the second dust fine filter. Compared with the prior art, the device has the advantages that the device can quickly respond to guarantee the supply of the purified compressed air of the instrument.

The utility model relates to the field of drying equipment, and discloses a multi-stage serial rotational flow drying device which comprises a first-stage rotational flow dryer, the feeding end of the first-stage rotational flow dryer is connected with a first-stage spiral conveyor, an air source and a material source, and the discharging end of the first-stage rotational flow dryer is connected with a second-stage spiral conveyor. The discharging end of the second-stage spiral material conveying machine is connected with a second-stage rotational flow dryer, and an overflow opening in the top of the first-stage rotational flow dryer is communicated with the feeding end of the second-stage rotational flow dryer through a pipeline. The multi-stage cyclone dryer can solve the problem of poor drying effect caused by direct end-to-end connection of multi-stage cyclone dryers in the prior art.

The utility model discloses a municipal sludge drying system which comprises a dryer, a material collector, a waste heat recoverer, a condenser, a heat exchanger and a hot blast stove, high-temperature drying air is introduced into the dryer to dry municipal sludge to be treated, the material collector collects dried finished products, a gas phase outlet of the material collector is connected with the waste heat recoverer, and a gas phase outlet of the condenser is connected with the hot blast stove. The waste heat recoverer recovers waste heat of airflow to obtain condensate water and low-temperature moisture-containing air, a gas phase outlet of the waste heat recoverer is connected with the condenser, and the condenser condenses the low-temperature moisture-containing air to obtain condensate water and low-temperature dry air; a gas-phase outlet of the condenser is connected with a first medium inlet of the heat exchanger, and a second medium inlet of the heat exchanger is connected with a gas-phase outlet of the hot-blast stove which is used for heating air to obtain high-temperature hot air. And a first medium outlet of the heat exchanger is connected with the dryer to provide the high-temperature drying air for the dryer, so that a circulating air path is formed, and the circulating air is used for continuously supplying heat to the dryer.

The invention relates to a preparation method of a PAN (Polyacrylonitrile) polymer liquid intrinsic viscosity and molecular weight test sample, which is characterized by comprising the following steps of: weighing 2g of PAN polymer liquid, flatly paving the PAN polymer liquid between the opposite surfaces of two flat and clean flat plates, and pressurizing the outer surfaces of the two flat plates under the pressure of not less than 5000Pa for 1 minute; separating the two flat plates, and washing the liquid films on the surfaces of the two flat plates with deionized water until the sample is completely in a white film state; boiling the soft white film in deionized boiling water for 30 minutes; the thin film is taken out and washed with deionized water for three times, and each time is not less than 30 seconds; putting into a clean aluminum foil plate, and drying for 1.5 hours in an electrothermal blowing drying box at 105 DEG C; and cooling the sample membrane in a dryer. The preparation method of the PAN polymerization liquid intrinsic viscosity and molecular weight test sample is reasonable in design, and instability of a detection result caused by organic solvents and impurities in the test sample can be avoided.

The invention discloses a built-in heating type air dryer which comprises a heat preservation shell, the heat preservation shell is filled with a drying agent, an air inlet and an air outlet are formed in the heat preservation shell, and a heating part wrapping the drying agent is installed in the heat preservation shell. The heating component comprises a heat conduction sleeve and a heating element arranged on the outer side of the heat conduction sleeve, a conductive bayonet socket is arranged on the outer side of the heat preservation shell, the interior of the conductive bayonet socket is electrically connected with the heating element, and the drying agent is completely wrapped by the heat conduction sleeve and the heating element to form an annular heating surface. Heat can be evenly transmitted to all parts of the drying agent through the heat conduction sleeve, local overheating or heating blind areas are avoided, the contact area of the drying agent and the heating face is maximized through wrapping type heating, the saturation risk is reduced, and the service life of the dryer is prolonged.