79results about How to "Lower dew point temperature" patented technology

A drying device for drying a gas comprises parallel cooling branches, at least one of which is in its active state at any given time. A gas-coolant heat exchanger arranged in each of the cooling branches has a first channel through which the gas to be dried flows in the active state of this cooling branch and a second channel which, in the active state of this cooling branch, forms an evaporator for a coolant circulating in at least one coolant circuit. The drying device further comprises an ambient-air input line, an ambient-air output line and an ambient-air conveyor. In the passive state of a respective cooling branch, the ambient-air input line and the ambient-air output line are connected, at least for a time, with this cooling branch by the switching device and the ambient-air conveyor conveys ambient air through the first channel of the gas-coolant heat exchanger arranged in this cooling branch.

The invention relates to a low water-air ratio and middle water-air ratio carbon monoxide (CO) conversion process. The process comprises the following steps of: (1) feeding raw gas into a pre-converter, wherein the temperature of the raw gas entering the inlet of the pre-converter is between 210 and 250 DEG C and the mole ratio of water to dried gas is 0.21 to 0.23; (2) feeding pre-converted mixed gas into a first converter to perform depth conversion, wherein the temperature of the pre-converted mixed gas entering the inlet of the first converter is between 260 and 290 DEG C and the mole ratio of water to dried gas is 0.8 to 1.0; (3) feeding the mixed gas passing through the first converter into a second converter, wherein the temperature of the mixed gas entering the inlet of the secondconverter is between 220 and 250 DEG C and the mole ratio of water to dried gas is 0.5 to 0.7; (4) feeding the mixed gas passing through the second converter into a third converter, wherein the temperature of the secondary conversion mixed gas entering the inlet of the third converter is between 205and 235 DEG C; and performing conversion on the mixed gas by using the third converter to obtain the mixed gas with the CO content lower than 0.40 percent. The process is unique and has the characteristics of high CO conversion rate, low energy consumption in the conversion process and the like.

The invention discloses a method and a related device for controlling radiation fresh-air conditioning systems. The method includes acquiring outdoor environmental temperatures; enabling fresh-air dehumidifiers to run according to the lowermost air grades under the control if the outdoor environmental temperatures reach first reference values, or acquiring air outlet dew-point temperatures of the fresh-air dehumidifiers if the outdoor environmental temperatures do not reach first reference values; enabling the fresh-air dehumidifiers to continue running according to current grades under the control if the air outlet dew-point temperatures reach second reference values but do not reach third reference values; lowering the air grades by a first preset number if the air outlet dew-point temperatures reach the third reference values, and then enabling the fresh-air dehumidifiers to run under the control; turning off heat pump water machines under the control when the air outlet dew-point temperatures reach fourth reference values. According to the technical scheme, the method and the related device have the advantages that turning-off frequencies of the heat pump water machines and water valves can be effectively reduced on the basis that condensation generated on the surfaces of radiation tail ends is effectively prevented, accordingly, the radiation fresh-air conditioning systems have sufficient refrigerating capacity, and the comfort can be improved for people in rooms.

A drying device for drying a gas comprises parallel cooling branches, at least one of which is in its active state at any given time. A gas-coolant heat exchanger arranged in each of the cooling branches has a first channel through which the gas to be dried flows in the active state of this cooling branch and a second channel which, in the active state of this cooling branch, forms an evaporator for a coolant circulating in at least one coolant circuit. The drying device further comprises an ambient-air input line, an ambient-air output line and an ambient-air conveyor. In the passive state of a respective cooling branch, the ambient-air input line and the ambient-air output line are connected, at least for a time, with this cooling branch by the switching device and the ambient-air conveyor conveys ambient air through the first channel of the gas-coolant heat exchanger arranged in this cooling branch.

The invention discloses a low-nitrogen condensation wall-mounted furnace and an application method thereof. The low-nitrogen condensation wall-mounted furnace comprises a draught fan, a fume collecting hood, a gas valve and a water-cooling combustor. An inner cavity of a gas distributing pipe of the water-cooling combustor is divided into two independent sections through a block plate, and each section is connected with a gas inlet joint. The gas valve is composed of a main on-off valve, a proportion regulating valve and two on-off valves, the main on-off valve is connected with a main gas inlet pipe, and outlets of the two on-off valves communicate with the two sections of the gas distributing pipe separately. The gas distributing pipe is sectioned, all fire rows or a part of fire rows on the gas distributing pipe are controlled to combust, small duty ratio is reduced, and the problems of flameout and too hot water temperature in summer can be solved. In addition, the constant-speed draught fan is adopted for the wall-mounted furnace, so the problem of corrosion of condensate water to a main heat exchanger can be solved. A ventilation baffle is further arranged at the bottom of the fume collecting hood to solve the problem of excessive CO emission under limit gas test conditions. Through experimental verification, when the small load regulation ratio of the wall-mounted furnace is between 0.35-0.5, the problems of flameout and too hot water temperature in summer can be solved.

The invention discloses a cooling and anti-condensation system for an outdoor ring network cabinet and a control method thereof, belonging to the technical field of the ring network cabinet. The invention relates to a cooling and anti-condensation system used in an outdoor ring network cabinet and a control method thereof. Through the reasonable arrangement of the inlet and outlet air outlets of the ring-net cabinet, after the pressurization treatment of two blowers with different air inlet directions, the two air currents blown in by the fan intersect in the ring network cabinet. The hot airin the cabinet can be quickly discharged at the upper and lower air outlets to realize the rapid cooling and dehumidification in the ring network cabinet, and meanwhile, the dew point temperature of the air in the ring network cabinet can be reduced to achieve the purpose of anti-condensation in the switch cabinet, so that the air in the ring network cabinet can be dissipated mutually and the airin the ring network cabinet can be dissipated quickly. The continuous pressurization of the fan can make the air pressure in the annular network cabinet appear positive pressure with respect to the atmosphere, so that the air at the gap between the bottom of the annular network cabinet and the cable well can only flow from the top to the bottom, and the humid air from the sealed cable well is prevented from entering the annular network cabinet, thereby achieving the functions of dehumidification and condensation prevention.

The invention belongs to the field of heat pump technologies and refrigeration air conditioners, and relates to a solution spraying type frostless air source heat pump device. The device comprises a compressor, a four-way valve, an indoor heat exchanger, a first expansion valve, an outdoor heat exchange unit and a control unit. A heat exchanger in the outdoor heat exchange unit comprises a spraying type heat exchanger body, a second expansion valve and a finned heat exchanger body, and outdoor air firstly passes through the spraying type heat exchanger body and then passes through the finned heat exchanger body. In the heating process, refrigerating fluid from the first expansion valve flows through the spraying type heat exchanger body, the second expansion valve and the finned heat exchanger body in sequence and flows to an air suction opening of the compressor. In the refrigeration process, the refrigerating fluid discharged out of the compressor flows through the finned heat exchanger body, the second expansion valve and the spraying type heat exchanger body in sequence and then flows to the first expansion valve. Through the adjustment of the opening states of the first expansion valve and the second expansion valve, the heat pump device has the advantages that the outdoor heat exchange unit operates without frost in the heating process, the heating performance is stable, the regeneration power consumption is low, and the refrigeration operating performance in summer is improved.

The invention discloses a wet flue gas desulfurization tower with a deep dehumidification function and a dehumidification process. Desulfurization spraying layers, demisters and a dehumidifier are sequentially arranged in the desulfurization tower from the middle part to the upper part, wherein the dehumidifier comprises dehumidification nozzles and a liquid receiving device arranged below the dehumidification nozzles. The wet flue gas desulfurization tower has the benefits as follows: the wet flue gas desulfurization tower integrates functions of desulfurization, demisting and dehumidification, and flue gas discharged from the desulfurization tower is not saturated wet flue gas with 100% relative humidity, but unsaturated and wet flue gas with adjustable and controllable relative humidity; the dew point temperature of the flue gas is reduced, the temperature is increased, the superheat degree is improved, the phenomena of white smoke and stack rain formed due to flue gas condensation are fundamentally avoided, and expensive materials used for corrosion prevention of a chimney are not required; the system flow is simplified, the equipment function integration degree is high, and the device occupies little land.

The invention relates to a housing (1) used for at least a battery module (2) or a battery system. The housing comprises at least a drying unit (3) which is arranged in the housing (1). The drying unit is provided with a drying medium (4) which absorbs moisture. The housing also comprises at least a thermoregulation unit (5) used to regenerate the drying medium (4), and at least a control device (13). The control device is configured to control regeneration of the drying medium (4). The housing (1) comprises at least a valve (6). The valve has a fist state and a second state. The valve (6) basically closes the housing (1) in the first state in an airtight manner, and in the second state, the valve (6) can realize that moisture emitted in regeneration of the drying medium (4) discharges from the housing (1). In addition, the invention relates to a battery pack, which has the battery system and the housing (1) surrounding the battery system.

Dryer for compressed air including at least one cooling unit (28), able to cool a refrigerant fluid circulating in at least one drying unit (22), provided with an air inlet (11) and an air outlet (13) and also comprising at least one circuit (18) inside which air to be treated circulates from said air inlet (11) to said air outlet (13). The dryer for compressed air comprises, along the circuit (18), at least one cooling apparatus (12), configured to cool the compressed air to positive temperatures, a few degrees above zero and near to freezing temperature, and at least one freezing apparatus (14), disposed downstream of the cooling apparatus (12) and configured to cool the compressed air to abundantly negative values.

The invention provides a high and low temperature environment simulation test device, wherein the high and low temperature environment simulation test device comprises an air compressor, a refrigerated dryer, an air filter, a cascade refrigeration system, a high and low temperature air delivery pipe and a thermal insulation box connected in sequence; the thermal insulation box packages the transmission product, the compressed air is cooled by the cascade refrigeration system after processed by the refrigerated dryer and filtered by the air filter, and transmitted to the thermal insulation box through the high and low temperature air delivery pipe.

The invention is an external gas humidifier for fuel battery, recycling high temperature waste heat produced by fuel battery and recovering the waste heat to reacting gas (H2 or air) and then processing by gas humidifier, able to effectively raise gas humidity in a short time, when the humidified gas enters into the fuel battery, it can make high molecular film obtain good humidifying effect so as to improve power generating efficiency and service life of the fuel battery.

The invention belongs to the technical field of gas boiler smoke waste heat recycling and film absorption, and relates to a smoke waste heat recycling system based on film absorption. The system comprises a gas boiler, a vacuum film water recoverer, a film bundle heat exchanger, an indirect heat exchanger, an air preheater, a heat supply pipe net, a chimney and the like. Smoke passes through a vacuum hollow fiber film bundle in the vacuum film water recoverer, water steam in wet smoke is separated from dry smoke, the dry smoke obtained after separation sequentially passes through the indirectheat exchanger and the air preheater, return water and air are heated through waste heat, meanwhile, the separated water steam enters the film bundle heat exchanger, primary heated return water in thewater tightness hollow fiber film bundle is further heated and is sent into the boiler or nearby secondary pipe net users, the water steam obtained after heat exchange is condensed, and water can bedirectly supplemented for the boiler. The system can achieve smoke dry and wet separation, heat energy in the water steam and the dry smoke obtained after separation can be efficiently utilized, waterresources are saved, and the phenomenon of chimney white smoke discharging is reduced.

The invention discloses an air conditioner outdoor unit, an air conditioner and an air conditioner outdoor unit defrosting method, and relates to the field of air conditioners, and the air conditioner outdoor unit defrosting method is used for defrosting of the air conditioner outdoor unit. The air conditioner outdoor unit comprises an outdoor heat exchanger, axial-flow fan blades and a dehumidification device. The dehumidification device is located at the upstream part in the air flowing direction of the outdoor heat exchanger and used for reducing the moisture in outdoor air driven by the axial flow fan blades and used for flowing to the outdoor heat exchanger. According to the above technical scheme, when the air conditioner is under the low-temperature heating work condition, the dehumidification device is utilized for conducting dehumidifying and drying treatment on the outdoor side inflow air, the dew point temperature of air exchanging heat with the outdoor heat exchanger is reduced, the evaporation temperature of the outdoor heat exchanger is higher than the dew point temperature of air in the heating process, and therefore no condensate water is condensed on the outdoor heat exchanger, and frosting cannot happen.

The invention discloses a method used for eliminating white mist water vapour at flue gas discharge outlets, and belongs to the technical field of low temperature wet flue gas treatment. According tothe method, condensation is carried out firstly, and then heating is carried out; wet method desulphurization flue gas is introduced into a condensing tower, a condensate liquid is adopted for spraying of the flue gas for condensation, so that the temperature of the flue gas is reduced, precipitation of condensed water is realized, and water in the flue gas is removed; the flue gas after removingof condensed water is introduced into a demister to remove mist granules and slurry droplets in flue gas; the flue gas is introduced into a heating device for heating and temperature increasing, so that the moisture saturation degree of the flue gas is reduced, the hypersaturated states of the flue gas are converted into unsaturated states, and flue gas is discharged. The method is capable of preventing generation of white mist effectively; investment cost and operation cost are low; economical benefit and environment benefit are excellent; white mist elimination effect is excellent; and the efficiency is relatively high.

The invention relates to a coal-charging and coke-discharging flue gas integration dust-removal process for a side coal-charging coke oven. A two-way connector valve is arranged on an oven column for the coke oven, the flue gas generated during the coal charging process of the coke oven and the flue gas generated during the coke discharging process of the coke oven enter in a common flue gas pipeline respectively through the two-way connector valve, and the dust removal is performed through a filtering type flue gas dust-removal device connected with the flue gas pipeline; the tar adsorption adopts a method that active powder adsorbent is sprayed in the flue gas pipeline, and the flue gas is discharged into atmosphere through a ventilator after being filtered and purified in a filtering type flue gas purification device; and the filtering type flue gas purification device performs off-line dust-cleaning regeneration after finishing coke discharging until the next coke discharging of the coke oven. No dust deposits in the process pipeline, the tar adsorption is complete, the dew point is not reached, the filter bag dust-cleaning regeneration is good, and the system is reliable and stable, thereby effectively ensuring the normal running of the coke oven with flue gas dust removal.

The invention relates to a process for preventing fogging and explosion of coal dried tail gas in dry bag-type dust removal process. The process comprises the following steps of: sucking high-dew-point and low-oxygen-content dust-containing dried tail gas which is exhausted from the tail of a drier into a bag-type dust remover by a draught fan for gas-solid separation; discharging separated dust which is deposited at the bottom of the bag-type dust remover by a star discharger; drawing purified carrier gas and water vapour to a safety place by the draught fan for exhausting; drawing a part ofthe tail gas from an outlet pipeline of the bag-type dust remover by a circulating fan; mixing a part of air which is heated by an air heater; and heating the air by using a circulating heater, and mixing into an outlet tail gas pipeline of the drier. The aim of preventing the fogging of the tail gas in the dried tail gas treatment process is fulfilled by cyclically heating the part of the tail gas and mixing a certain amount of hot air, the aim of preventing the explosion is fulfilled by controlling the content of oxygen in an outlet of the bag-type dust remover, and the fogging of the driedtail gas in the bag-type dust remover is prevented during explosion prevention.

The invention provides a solid adsorption technology based frostless air source heat pump system. The solid adsorption technology based frostless air source heat pump system comprises an air channel, a compressor, a condenser, a drying heat exchanger, an evaporator and a fan. The air channel is in a shape of a Chinese character 'ao', two shoulder portions of the air channel are respectively provided with an air outlet and an air inlet, and two mutually parallel side walls, perpendicular to the air inlet direction, on the air channel are respectively the first air channel side wall and the second air channel side wall. The drying heat exchanger, the evaporator, the fan, a first air valve, a second air valve, a third air valve and a fixing device are arranged in the air channel. The solid adsorption technology based frostless air source heat pump system can avoid evaporator frosting, and the operating energy efficiency of the system is improved. Under the moisture absorption effect of a drying agent, the moisture content of air undergoing heat exchange of the evaporator is reduced, the dew point temperature of the evaporator is reduced and is made lower than evaporation temperature, and the frostless operating effect of the evaporator is achieved.

An ultra-low temperature smoke-exhausting energy-saving boiler relates to an energy-saving boiler capable of reducing pollution discharge. The invention aims to solve the problems of low fuel utilization efficiency caused by high dust concentration and high carbon content of fly ash in exhaust gas of existing coal-fired industrial boilers, and wear and tear of heat exchange equipment such as convection tube bundles and economizers at the tail of the boiler. The upper end of the furnace body communicates with the upper end of the vertical flue through the cyclone dust collector, the bottom end of the cyclone dust collector communicates with the furnace body, and a desulfurizer spout is opened on the upper end surface of the furnace body. The invention realizes the recycling of the desulfurizer in the effective area of ​​high-temperature sulfur fixation, greatly reduces the SO3 content in the flue gas while improving the SO2 removal efficiency, and improves the energy efficiency of the boiler by more than 10%; the unburned carbon particles are sent back for reburning The carbon content of the fly ash can be reduced to less than 2%, and at the same time, it can improve energy efficiency and reduce equipment wear. The energy-saving boiler of the invention can be used not only for newly-built boilers, but also for technical transformation of existing boilers.

The invention discloses a ship exhaust emission monitoring system and a control method thereof, relates to the technical field of ship exhaust emission, and the system and the control method are used for solving the problem of low detection precision of an exhaust emission detection system in a ship in the prior art. The ship exhaust emission monitoring system comprises a sampling module, a processing module and a concentration detection module which are connected in sequence, wherein the sampling module collects gaseous pollutants discharged by a ship, the processing module processes the gaseous pollutants, the dew point temperature of the gaseous pollutants is lower than a preset dew point temperature so as to obtain to-be-detected gas, and the concentration detection module detects concentration parameters of various gases in the to-be-detected gas. The ship exhaust emission monitoring system and the control method thereof are used for detecting the exhaust emission condition of the ship.

The invention provides an anti-condensation device of a dry dust collector for high-humidity dust-containing air. The anti-condensation device comprises a shell, wherein the shell is provided with an access door; an air inlet and an air outlet are formed at the left and the right ends of the shell respectively; an evaporator and a condenser are arranged in turn in the shell and are arranged over against the air inlet; a water collecting dish is arranged below the evaporator and is connected with a drain opening by a pipeline, wherein the drain opening is arranged on the bottom end of the shell; by adoption of the anti-condensation device, the problem of unable to adopt the dry dust collector in when processing the high-humidity dust-containing air can be effectively solved, the water treatment cost and the water source waste caused by using a wet dust collection are avoided; the anti-condensation device is simple in structure and convenient to mount, with practical value in both new plant and existing plant which are provided with high-humidity dust-containing process exhaust; and has the following characteristics of simple field management, easy operation, etc.

A cold plate including a cold wall, a first cavity, a first pipe, a second cavity, an expansion unit and a second pipe is provided. The first cavity covers on the cold wall to form a first fluid space, and the first pipe is connected with the first cavity. The second cavity is disposed inside the first cavity and covers on the cold wall to form a second fluid space. The expansion unit is disposed between the second cavity and the cold wall to interconnect the first fluid space and the second fluid space. The second pipe is disposed inside the first pipe and connected with the second cavity. Besides, a refrigeration system including the cold plate mentioned above is also provided.

The invention discloses a device for increasing the superheat degree of smoke obtained after wet desulphurization and a use method. The device comprises a smoke superheater. The smoke superheater comprises a container. A plurality of atomization nozzles are arranged in the container and connected with a working medium pool containing an absorption working medium of a certain concentration. The container is provided with a thin working medium outlet. A purifier, a thin working medium pool and a water-liquid separator are sequentially arranged between the thin working medium outlet and the working medium pool. The device and the use method have the advantages that vapor migrates to the absorption working medium from the smoke and releases heat through direct contact between the absorption working medium and the smoke, the dew point temperature of the smoke is decreased, temperature is increased, the superheat degree is increased, diffusion capability is enhanced, and thus the phenomenon that white smoke or chimney rain is formed at a chimney outlet is fundamentally avoided; no dividing wall type heat exchange device is needed, the smoke and the absorption working medium make direct contact for heat transfer and mass transfer, efficiency is high, resistance is small, and the parameters of the chimney outlet can be regulated as needed.

The present invention provides a smoke dust concentration direct-reading monitoring system and method, the monitoring system comprises a speed measuring device, a dilution device and a measuring device, and further comprises a gas supply means, a switching unit and a second flow meter, the gas supply means comprises a pipe, a heating unit, a first flow meter and a valve, the heating unit, the first flow meter and the valve are successively disposed on the pipe, the output end of the valve is connected with the dilution device, the switching unit is used for selectively communicating a smoke inlet of the measuring device with the dilution device or a pipe between the valve the first flow meter, and the second flow meter is disposed on a downstream pipe of the measuring device. The smoke dust concentration direct-reading monitoring system has high reliability, precise monitoring and other advantages.

The invention discloses a device for preventing moisture condensation of a closed bus. The device comprises a dehumidifying system, a drying system and a control system. The dehumidifying system includes an air source cabinet, a communication pipe, an air suction branch, and a first air inlet branch, wherein one ends of the air suction branch and the first air inlet branch are connected with the air source cabinet, and the other ends are connected with a case of the closed bus; and the communication pipe is used for connecting the three-phase cases of the closed bus. The drying system includes an air compressor, a heater, an air exhaust branch, and a second air inlet branch, wherein the air compressor is connected with the heater; the second air inlet branch is respectively arranged on the three-phase cases of the closed bus; the other end of the second air inlet branch is connected with the heater; and the air exhaust branch is connected with the case of the closed bus. The control system includes a temperature and humidity sensor, and a PLC (programmable logic controller) control system, wherein the temperature and humidity sensor is respectively arranged in the three-phase cases of the closed bus, and is connected with the PLC control system. The device provided by invention has low requirement for the sealing performance of the bus, can be used under all conditions, and is convenient and intuitive in use and low in maintenance cost.

The invention discloses a cooling and drying integrated machine, which comprises a scroll compressor, a filter, a radiator, a gas collection bottle, a shell and tube pre-cooler, a heat tube type evaporator, a gas-liquid separator and an air conditioning system, wherein the scroll compressor, the filter, the radiator, the gas collection bottle, a hot fluid inlet of the shell and tube pre-cooler, a hot fluid outlet of the shell and tube pre-cooler, the heat tube type evaporator and the gas-liquid separator are sequentially connected; a gas outlet of the gas-liquid separator is connected with a cold fluid inlet of the shell and tube pre-cooler; a cold fluid outlet of the shell and tube pre-cooler is connected with a compressed air user; and the air conditioning system consists of the heat tube type evaporator, an expansion valve, a condenser and a piston compressor which are connected in sequence. The device has the advantages of simple structure, high heat exchange efficiency and capability of realizing energy conservation and emission reduction, and can be applied to various occasions.

A cold plate including a cold wall, a first cavity, a first pipe, a second cavity, an expansion unit and a second pipe is provided. The first cavity covers on the cold wall to form a first fluid space, and the first pipe is connected with the first cavity. The second cavity is disposed inside the first cavity and covers on the cold wall to form a second fluid space. The expansion unit is disposed between the second cavity and the cold wall to interconnect the first fluid space and the second fluid space. The second pipe is disposed inside the first pipe and connected with the second cavity. Besides, a refrigeration system including the cold plate mentioned above is also provided.

Methods for olefin metathesis including contacting a olefin feed stream with a metathesis catalyst at a temperature and at a pressure sufficient to maintain the reactor olefin compositions in a mixed-phase condition including components in the liquid phase and components in the vapor phase, where the mixed-phase reaction conditions shift the equilibrium to desired product olefins.

The invention discloses a device for desulfurizing flue gas by seawater through membrane absorption and its process, the flue gas is sent to a membrane absorber shell side by a supercharging blower fan, the pretreated seawater enters in a membrane absorber tube side through a sea water pump and is taken as absorption liquid, gas phase and liquid phase form a reaction interface at the micropore of a hollow fiber membrane, SO2 in flue gas is reacted with seawater to generate sulfite and timely is taken away for realizing the flue gas desulphurization. Desulfurized seawater is discharged through aeration sulfur fixation and pH value standard achieving. The device of the invention is composed of a one stage or multistage membrane absorber, the membrane absorber is composed of multi-group curtain type or column type hollow fiber film component group. The process has the characteristics of low air resistance of the device, small power consumption and high desulphurization efficiency. A design of an automatic on-line backwashing and cleaning technology is capable of controlling and mitigating membrane pollution, the device possesses small volume and light weight, and enables modularized integration; the flow velocity of the gas phase and the liquid phase can be independently controlled in a wide scope, and the problem of device corrosion caused by entrainment water vapor in flue gas in a traditional seawater method can be avoided.

The invention discloses drying equipment applying a sealed negative pressure air supply system, which comprises a sealed library body, wherein a library door is arranged on the sealed library body, the sealed library body comprises a heat processing region and a drying region, a heat exchanger is arranged in the heat processing region, a draught fan is arranged under the heat exchanger, a pipeline is arranged in the drying region and is connected with the heat processing region, a rotary dehumidification device is arranged outside the sealed library body, and the two ends of the rotary dehumidification device are respectively provided with the heat processing region and the drying region. Since the heat processing region, the drying region, the rotary dehumidification region and the sealed library body are arranged, air circulation adopts an air suction form, and air forms a negative pressure region by resistance loss of the heat exchanger and a pipeline. Compared with the traditional drying equipment, the drying equipment has the advantages that the ideal effects of reducing air relative humidity, dew point temperature and steam partial pressure, and drying a material can be achieved.