1943 results about "Air heating" patented technology

The utility model discloses anti-condensation equipment which comprises a shell, an induced draft fan is fixedly connected to the top of the inner side face of the shell, an air duct is fixedly connected to the side, close to the induced draft fan, of the inner side face of the shell, and a refrigerator is fixedly connected to the middle of the inner side face of the air duct. According to the anti-condensation equipment, the induced draft fan, the refrigerator, the condensation pieces, the heater and the exhaust fan are arranged, the induced draft fan enables external air to enter the air flue through the through holes, external humid air is cooled on the condensation pieces to generate condensation and be cooled, and therefore low-temperature dry air is obtained and then is primarily heated under the action of the heating end of the refrigerator; the heater heats the primarily heated air to a proper temperature, and finally, the dry air is reduced and conveyed into the shell under the action of the exhaust fan, so that the dryness of the air is effectively improved, condensation caused by too low temperature of the air in the equipment can be prevented, and the dehumidification and condensation prevention effects are achieved.

The invention relates to the technical field of drying, and provides multi-mode uniform drying equipment which comprises a microwave drying device, an infrared drying device, a heat pump dehumidification drying device, a negative pressure device, a monitoring and control system and a multi-mode drying system. The microwave drying device comprises a cavity, a cavity telescopic unit, a waveguide and a plurality of solid-state microwave sources. The infrared drying device comprises a fixed infrared heating unit, a movable infrared heating unit, a first power interface and a second power interface; the heat pump dehumidifying and drying device comprises a hot air heating and dehumidifying unit, a waste heat recovery unit and a gas filter; the negative pressure device comprises a vacuum pump, a vacuum pipeline and a pipeline expansion joint; the multi-mode drying system comprises a material drying space motion multi-mode system and a drying mode multi-mode system; the monitoring and control system comprises a color real-time monitoring unit, a dielectric property real-time monitoring unit and a control adjusting screen; by combining microwave, infrared, hot air, negative pressure and various material space motions, uniform drying and multi-scene drying of materials are achieved, and the good drying effect is guaranteed.

The embodiment of the utility model discloses a nano water particle bath assisting device. According to one specific embodiment, the nano water particle bath assisting device comprises a bath assisting device shell, a nano water particle generating assembly, a wind power assembly and a heating assembly. The nano water particle generating assembly comprises a water tank, a centrifugal impeller, a centrifugal impeller motor, a water pump, a water pump water inlet pipe and a water pump water outlet pipe. The centrifugal impeller motor is used for driving the centrifugal impeller to rotate; the water pump is used for conveying water pumped from the water inlet to the water tank; the wind power assembly comprises a centrifugal fan, a centrifugal fan air inlet flange, a centrifugal fan air inlet rotating valve and a ventilating duct, the ventilating duct is communicated with an air outlet of the centrifugal fan and the water tank, and a hot air heating pipe is arranged in the centrifugal fan; the bath assisting device shell is provided with a water particle air outlet, and the water particle air outlet is used for being communicated with the bath assisting bin so as to provide water particles into the bath assisting bin. According to the embodiment, the probability of disease attack of the bather can be reduced, and the safety of the bather is improved.

The invention discloses a wind driven generator blade deicing system and method, and relates to the technical field of wind power generation, the wind driven generator blade deicing system comprises fan blades, a generator cabin and a tower, the fan blades are fixedly connected to the peripheral side of a hub, the middle of the hub is connected with the generator cabin through a main shaft, and the lower end of the generator cabin is connected with the tower; an air heating box is arranged in the tower, air is heated through an electric heater, hot air is conveyed into fan blades, a soaking net is embedded in the fan blades, heat of the hot air is transferred to the soaking net through a heat conduction plate arranged in the fan blades to heat the fan blades, the temperature of the surfaces of the fan blades is evenly increased, and the heat conduction effect is improved. And meanwhile, hot air is blown to the surfaces of the fan blades from the annular air spraying pipes, the deicing efficiency is improved, heat generated when the generator works is absorbed through the heat exchanger, cold air is preheated, and the utilization efficiency of energy is improved.

A shoe care device include an accommodation space configured to accommodate shoes; a connection path constituting a flow path; a blowing part disposed in the connection path and configured to blow the air; a dehumidifying part disposed in the connection path and configured to dehumidify the air; a heating part disposed in the connection path to heat the air; a regeneration path branching from the connection path and configured such that the air heated by the heating path moves therethrough; a sump configured to accommodate water condensed inside the shoe care device; and a drain tank configured to store water drained from the sump. The drain tank includes: a first drain inlet hole provided at the upper end of the drain tank; and a first water level limit hole provided in the lower portion of the first drain inlet hole and connected to the sump.

The present invention relates to the field of carbon fiber material molding, and specifically to a carbon fiber material molding autoclave. The carbon fiber material molding autoclave includes a tank body, an oil tank, an oil tank heating mechanism and an air heating mechanism. The tank body is provided with a pressurizing channel for pressurizing the inside thereof, and is provided with an air temperature monitoring device for detecting the air temperature in the tank body; the oil tank is located in the tank body, is filled with oil, and is provided with an oil temperature monitoring device for detecting the oil temperature, the surface of the oil is covered with soft silicone for wrapping a workpiece, and the outer ring of the soft silicone is sealed and connected to the oil tank; the oil tank heating mechanism is installed in the oil tank, and is used to work according to the oil temperature monitored by the oil temperature monitoring device; the air heating mechanism is installed in the tank body, and is used to work according to the air temperature monitored by the air temperature monitoring device. The present invention can keep the temperature constant during the material molding process to improve the quality of the workpiece.

The invention relates to the technical field of aluminum anode machining, and discloses heating equipment for oil well casing aluminum anode machining, which comprises a bottom frame and further comprises two chucks which are mounted on the bottom frame and can rotate, and the two chucks are coaxially arranged and can be adjusted close to or away from each other so as to clamp an aluminum anode tube; the clamp structure is mounted on the opposite surface of the chuck and can center and fix the aluminum anode tube in an inner supporting or outer clamping manner, and a closed space is formed in the aluminum anode tube after the clamp structure is fixed; the heating part extends into the aluminum anode tube and is used for heating air in the aluminum anode tube and heating the aluminum anode tube in a heat conduction and heat convection manner; and the pressure control assembly can be used for pumping out or filling air in the aluminum anode tube. By switching between low voltage and high voltage in the aluminum anode tube, the aluminum anode tube can correspond to heating states in different time periods, so that the quality of a coating in the aluminum anode tube is improved, and the service life of the aluminum anode tube in a severe environment is prolonged.

The invention relates to the technical field of environment-friendly equipment, in particular to an efficient energy-saving type waste gas treatment system and process for a biomass and garbage boiler, and the treatment system comprises an air preheater, a dry desulphurization device, a dust remover, a low-temperature denitration device, a heat exchanger and a chimney which are sequentially connected at an outlet of the boiler. An inlet and an outlet of a first heat exchange channel of the heat exchanger are connected with a low-temperature denitration device and a chimney respectively, and an inlet and an outlet of a second heat exchange channel of the heat exchanger are connected with air and an air preheater respectively. Therefore, the temperature of waste gas in desulfurization, dust removal and denitration links is increased, and finally heat energy is recycled by the heat exchanger. The process is free of additional energy supplement, the emission temperature is reduced, the heat energy loss is less, the advantages of energy conservation and emission reduction are achieved, the denitration reaction temperature is increased, and the denitration efficiency is improved.

The utility model provides a high-enthalpy pure air heating device which is used for solving the technical problem that according to an existing heating mode, the attributes of incoming flow air and real air are different. The heating device comprises a gas inlet unit, a heating unit and a gas collecting unit, the air inlet unit is connected with the heating unit; the heating unit comprises a shell, and a heat transfer chamber and a combustion chamber which are arranged in the shell; the heat transfer chamber is coaxially installed in the shell, the radial section of the heat transfer chamber is of a circular ring structure, and the combustion chamber is axially installed in the center of the circular ring structure. A plurality of radial channels and axial channels which are mutually independent are arranged in the heat transfer chamber; the two ends of each radial channel communicate with the combustion chamber and the residual gas outlet correspondingly, and the radial channels are used for conveying high-temperature gas. The two ends of each axial channel communicate with the air inlet and the air outlet correspondingly, and the axial channels are used for conveying incoming flow air. And the gas collection unit is used for collecting the high-enthalpy air and transmitting the high-enthalpy air to external test equipment. The device is high in heating speed, and pure high-enthalpy air can be obtained.

According to the rewarming system for treating and curing the human body hypothermia, a ventilation rewarming circulation channel is designed and comprises an air inlet communicated with a heat preservation sleeping bag, an air inlet channel, an air power device, an air outlet connecting sleeve, an air heating unit, an air guide switching assembly and an air outlet communicated with the heat preservation sleeping bag. And the ventilation and rewarming functions of the wounded with the hypothermia can be better realized. A breathing rewarming channel is designed, a heating channel comprises an oxygen supply inlet, a breathing ventilation module, an inner breathing heating module, a switching assembly, a breathing heating interface, an outer breathing heating module and a breathing mask, and a humidifying channel comprises a breathing atomization module, a switching assembly, a breathing heating interface, an outer breathing heating module and a breathing mask. And the breathing rewarming function of the wounded with the hypothermia can be better realized. An infusion rewarming channel is designed, the infusion rewarming channel comprises an infusion pump door, an infusion unit and a heating unit, and the infusion rewarming function of the wounded with the hypothermia can be better achieved.

The invention relates to the technical field of material drying, in particular to spray drying equipment. The spray drying equipment comprises a spray drying tower, an atomizer and a heating system, wherein the atomizer is arranged in the center of the top of the spray drying tower; an inlet of the heating system is used for inputting external air, an outlet of the heating system is used for conveying hot air into the spray drying tower, and the temperature of the hot air conveyed by the heating system is in a decreasing trend from the center of the spray drying tower to the tower wall of the spray drying tower. In the drying process of the spray drying equipment, the heating temperature at the center of the spray drying tower is higher than the heating temperature near the tower wall of the spray drying tower, the high heating temperature at the center of the spray drying tower can guarantee the drying degree of materials, and the low heating temperature near the tower wall of the spray drying tower can further dry the materials and also can guarantee the drying degree of the materials. And meanwhile, the temperature of the material cannot reach the glass-transition temperature, so that the aim of inhibiting the hot-melt wall sticking phenomenon is fulfilled.

The present application relates to air conditioning technology field, specifically relates to a kind of partition regulation formula refrigeration constant temperature and humidity air conditioning unit with air supply system, comprising: unit machine case;Constant temperature air supply structure for temperature regulation for air supply system air supply is equipped in the inside of unit machine case, and the air supply end of constant temperature air supply structure is connected with air duct for wind force transmission;The air duct is installed with constant humidity partition regulation structure for indoor partition regulation air supply in air outlet end.This application, in hot air heating mode, system can effectively deliver hot air to each partition by closing No. 1 and No. 3 electromagnetic valve, realize subarea heating, improve energy utilization efficiency, in cold air refrigeration mode, system is adjusted closed flap and starts compressor, so that cold air is delivered to each partition after refrigeration cycle, also realize subarea refrigeration, exhaust air and dust mode can extract indoor peculiar smell and dust, improve indoor air quality.

An integrated thermal management system (1000) and a vehicle, the system (1000) comprising a heat pump subsystem (100) used for exchanging heat with a passenger compartment (60) and a battery (60) of the vehicle, the heat pump subsystem (100) including a compressor (1) and a control valve (33), one end of the control valve (33) being connected to an exhaust port of the compressor (1) and the other end of the control valve (33) being connected to a return port of the compressor (1) or to the return port of the compressor (1) via a gas-liquid separator (27), and The system includes a high-pressure cooling subsystem (200) for exchanging heat with the system (11) and the heat pump subsystem (100), a battery self-heating subsystem (300) for heating the battery (70) by charging and discharging it, an air heating subsystem (400) for exchanging heat with the passenger compartment (60), and a control subsystem for controlling a control valve (33) to connect the exhaust port of the compressor (1) and the return port of the compressor (1) to each other, thereby realizing air supply and enthalpy increase.

The invention discloses an air preheating biomass boiler, belongs to the technical field of boilers, and aims to solve the problems of low combustion efficiency, insufficient flue gas waste heat utilization and particulate matter emission of a traditional biomass boiler. Function optimization is achieved through a main body structure composed of a furnace body, a charging barrel and a rotating pipe, a double-spiral-disc heat exchange assembly is arranged in the charging barrel, biomass fuel is preheated through boiler exhaust smoke waste heat, meanwhile, smoke is discharged through exhaust holes after being distributed through spiral disc gas storage cavities, and unburned particles are filtered by a biomass layer and carried to a hearth to be subjected to secondary combustion; an air inlet cavity is formed in the rotating pipe, and air is preheated through the fixed pipe and the first connecting pipe and then input into the hearth. The exhaust assembly adopts a sliding rod and sealing block matched structure, and a convex block mechanism driven by a rotating pipe drives the sealing block to periodically move, so that gas in the charging barrel is intermittently exhausted through a double-layer filter screen. According to the boiler, the heat efficiency is improved through a smoke-air two-way preheating and particulate matter secondary combustion mechanism, and the biomass preheating, air heating and emission treatment process is optimized.

The invention discloses a detection device and method for a polyester heat shrink tube for a battery, and the device comprises a rotating disc mechanism, the rotating disc mechanism comprises a glass rotating disc, and a hot air nozzle mechanism, a ball ejection mechanism and a first visual detection mechanism are sequentially arranged in the circumferential direction of the rotating disc mechanism; the hot air nozzle mechanism comprises a heating assembly, the heating assembly is provided with a heating nozzle, the ball ejection mechanism comprises a ball circulation assembly, one end of the ball circulation assembly is provided with a nozzle assembly, and the first visual detection mechanism comprises a first area light source arranged below the glass rotary table and a first camera arranged above the glass rotary table. The first camera is used for performing light-transmitting image capturing on the to-be-detected heat shrink tube; the comprehensive detection of the thermal shrinkage performance, the mechanical strength and the internal quality of the polyester heat shrink tube for the battery is realized through three testing means of hot air heating, ball impact and light-transmitting visual detection, and the improvement of the product quality control level is facilitated.

The invention relates to the technical field of automobile seats, and discloses an automobile seat with multiple ventilation functions, which comprises a seat mechanism, an air interaction mechanism for ventilating the outer surface of the seat is arranged at the lower part of the center in the seat mechanism, and a heating mechanism for heating air is arranged at the lower end of the air interaction mechanism. Reciprocating overturning mechanisms used for driving the air interaction mechanism to obliquely overturn in a reciprocating mode are arranged on the two sides of the air interaction mechanism correspondingly, when the outside temperature is high, multiple motors in the air interaction mechanism start to rotate in the forward direction, so that multiple fan blades rotate and generate airflow to absorb heat around the surface of the seat, and at the moment, the surface of the seat is kept cool, and the comfort of the seat is improved. And when the temperature is reduced, the heating mechanism is started, the motor reversely runs, fan blades in the air interaction mechanism are pushed to rotate, airflow is heated when passing through the heating mechanism, then warm air is sent to the surface of the seat, and it is ensured that warm is provided for passengers in the cold environment.

The utility model belongs to the technical field of electric smoking devices, and particularly provides a heating smoking set. The radial outer side of a containing cavity of the heating smoking set is provided with a heating cavity, the heating cavity is provided with an air inlet communicated with outside air, a second heating element used for heating the air in the heating cavity is arranged in the heating cavity, and the peripheral side of the containing cavity is provided with communicating holes communicated with the heating cavity so that the heated air can enter the containing cavity. The projection of the communicating hole in the radial direction of the containing cavity is located on the 1 / 2 side, close to the insertion end, of the first heating element. According to the utility model, the hot air can be quickly and accurately directly blown to the lower-temperature part of the heating element for internal heating by changing the air inlet position of the hot air into the accommodating cavity, so that residual chemical components in tobacco materials can be fully released in the later period of smoking.

The utility model relates to the technical field of breeding equipment, in particular to a temperature-controllable pig house ventilation adjusting device which comprises an air inlet box installed on the wall of a pig house, and a heating box is installed at the air outlet end of the air inlet box. According to the utility model, external air can be introduced into the device through the air inlet box; a servo fan arranged in the air inlet box can provide power for air flowing, and an adjusting knob can control the rotating speed of the servo fan, so that the air inlet amount is adjusted; a plurality of groups of electric heating nets which are uniformly arranged at equal intervals are arranged in the heating box, and each group of electric heating nets can be respectively controlled through a switch on a control panel, so that the accurate control on the air heating degree is realized; the hot air conveying pipe can convey the heated air to a specific position; the air inlet end of the hot air cover is connected with the hot air conveying pipe through the telescopic corrugated pipe, the position of the hot air cover can be flexibly adjusted through the telescopic corrugated pipe, hot air can be conveniently conveyed to different positions in the hog house, and the temperature requirements of different areas in the hog house are met.

The invention discloses rapid drying equipment and method for the secondary side of a nuclear power steam generator, the rapid drying equipment for the secondary side of the nuclear power steam generator comprises an air compressor, an air heating device and a gas distributor which are connected in sequence, and the gas distributor is connected with holes in the secondary side of the nuclear power steam generator through a plurality of pipelines; heating gas is input to the secondary side of the nuclear power steam generator; the rapid drying equipment for the secondary side of the nuclear power steam generator further comprises a plurality of dew-point temperature probes and a drying monitoring device connected with the dew-point temperature probes, and the dew-point temperature probes are arranged in holes in the secondary side of the nuclear power steam generator respectively. And the dew point temperature probe is used for feeding back dew point temperature information to the drying monitoring device in real time. According to the rapid drying equipment for the secondary side of the nuclear power steam generator, the secondary side of the nuclear power steam generator can be rapidly dried, the drying condition of the secondary side can be monitored in real time, the drying operation time can be effectively shortened, and the drying efficiency is improved.

The invention relates to the technical field of medical cleaning disinfectors, in particular to a disinfector capable of recovering heat energy and draining water at low temperature and a pipeline control system. Comprising a cabin body, a pure water tank and a waste water tank, the pure water tank is arranged at the upper end of the cabin body, the waste water tank is arranged at the lower end of the cabin body, one side of the cabin body is connected with two peristaltic pumps, the two peristaltic pumps are connected in parallel, the two peristaltic pumps are connected with two liquid level floating balls, and a pressure transmitter is arranged at the upper end of the cabin body and connected with a circulating pump. The circulating pump is connected with the lower end of the cabin body, an air heating box is arranged between the pressure transmitter and the circulating pump, the air heating box is connected with a high-efficiency filter, and a second wind pressure switch is arranged between the air heating box and the high-efficiency filter; according to the integrated design, heat energy of disinfected water is recycled, and meanwhile low-temperature drainage is achieved.

The invention provides a heating furnace of a waste plastic regeneration extruder, and relates to plastic recovery. The heating furnace of the waste plastic regeneration extruder comprises a screw extruder, the inlet end of the screw extruder is connected with and penetrates through a heating sleeve, and the heating sleeve is divided into a hot air heating unit at the upper end and a hot melting unit at the lower end. According to the heating furnace of the waste plastic regeneration extruder, hot air is used for firstly heating plastic, the plastic is layered and fully heated in the bearing cage, and a pressing rod is pressed to drive an elastic pore plate to swing before the plastic is softened, so that a gap is formed between the elastic pore plate and a ferrule; plastic fragments fall into the material sliding ring from the gap and are discharged to the position above the supporting plate through the through hole, the plastic fragments can be stirred and hot-melted through revolution of the heating rod, the plastic fragments are hot-melted into fluid, the fluid can be extruded into the screw extruder under the action of the pressing plate, and the problem that in the prior art, the melting speed of the plastic fragments is low is solved.

The utility model discloses a concrete curing device for concrete preparation, and relates to the technical field of concrete curing. The device comprises a main rod, a rectangular mounting frame is hinged to the top of the main rod, a nozzle is fixedly connected to the interior of the rectangular mounting frame, a connecting hose is fixedly connected to the input end of the nozzle, abutting rollers are rotationally connected to the four corners of the rectangular mounting frame, and an air guide pipe is rotationally connected to the interior of the rectangular mounting frame; and an electric heating wire is fixedly connected into the air guide pipe. After the traction main rod drives the rectangular mounting frame to approach the to-be-watered concrete wall surface, the air pump and the electric heating wire are started to heat external air, and then the heated air is sprayed to the to-be-watered concrete wall surface through the air spraying opening, so that the heated air is conveniently output to the concrete wall surface through the air spraying opening in a low-temperature environment; therefore, the temperature of the concrete wall surface is increased by heating air, normal solidification and drying of the concrete wall surface are guaranteed, and the problems of freezing and strength reduction caused by low temperature are prevented.

The utility model discloses a humidity control device for a high-voltage cabinet of a power distribution room, and belongs to the field of electrical technology. The humidity control device comprises a control circuit arranged in the high-voltage cabinet, a raindrop detection circuit electrically connected with the control circuit and arranged outside the power distribution room, a first humidity detection circuit arranged in the power distribution room and a second humidity detection circuit arranged in a cable trench of the high-voltage cabinet; the control circuit is further electrically connected with an air heating circuit arranged in the high-voltage cabinet, and the control circuit receives humidity or raindrop signals and starts the air heating circuit. The humidity inside and outside the cabinet is detected in real time through the humidity detection sensor, and the air heating circuit is controlled to heat air in the high-voltage cabinet, so that air pressure in the cabinet is higher than that outside the cabinet, moisture outside the cabinet is difficult to enter the cabinet, and due to temperature rise in the cabinet, the dew point temperature in the cabinet can be increased, the problem of dew formation is reduced, and the humidity in the cabinet is reduced. And the insulation effect in the cabinet is improved.

The utility model discloses a heater for finished product drying equipment for activated carbon production, which is characterized in that a first heating component and a plurality of groups of support rods inserted on a rotating shaft are arranged, a plurality of groups of heating rods are transversely inserted among the plurality of support rods in the same group, and the heating rods are electrically connected with an external power supply; the control module is electrically connected with the heating rod and the turnover mechanism; the control module is matched with the material turning mechanism to stir the activated carbon particles, and the control module controls the multiple heating rods in the same group to be powered on so as to heat the activated carbon particles moving in the same area. The first heating assembly and the second heating assembly are used in cooperation, and activated carbon particles can be dried in a direct contact heating mode and a hot air heating mode at the same time. The first heating assembly directly heats the surfaces of the particles, and the second heating assembly conveys hot air through the air outlet assembly, so that the particles are comprehensively heated.

The invention relates to an energy-saving method for flue gas waste heat recovery and automatic adjustment and use of a garbage power plant, which solves the technical problems of low garbage incineration efficiency and serious heat waste of the existing garbage incineration power plant, and comprises the following specific steps: step 1, mounting a flue gas heat exchanger at the middle section from an outlet of an induced draft fan to a chimney for gas-water heat exchange; heat medium water is generated through gas-water heat exchange of the flue gas heat exchanger; 2, the heating medium water is directly connected with an air heating system to circularly convey a heat source, and the air heating system conducts air-water heat exchange with sucked air through the heating medium water; and 3, the exchanged hot air is provided as a heat source in front of a primary air fan according to actual needs, the primary air temperature is increased, or the exchanged hot air is converted to an air circulation fan, and the hot air is provided for the low-temperature garbage bin, the garbage temperature is increased, and garbage fermentation is facilitated through a pipeline arranged inside or outside the garbage bin. The device can be widely applied to waste incineration occasions of waste incineration power plants.

The invention relates to an energy-saving method for automatic adjustment and use of flue gas waste heat recovery of a garbage power plant, and solves the technical problems that an existing garbage incineration power plant is low in garbage incineration efficiency, the temperature of discharged flue gas is high, and heat of acid flue gas cannot be effectively utilized. A flue gas heat exchanger is arranged from the outlet of the bag-type dust collector to the middle section of the chimney for gas-water heat exchange, and sensible heat in flue gas is extracted to generate heat medium water; 2, the heating medium water is conveyed to a heat exchange unit through a pipeline, and temperature rising and heating of the deoxygenated water are achieved; and 3, the heat medium water subjected to heat exchange and cooling continues to provide heat for the air heating system, and primary air entering the garbage incinerator is heated or hot air entering the garbage bin is heated. The device can be widely applied to waste incineration occasions of waste incineration power plants.

The invention belongs to the technical field of hydrogen storage, and discloses an integrated framework for charging and discharging hydrogen in solid hydrogen storage. Comprising a solid hydrogen storage main frame for placing a solid hydrogen storage bottle, a fin radiator divided into a fan cover and a fin area, and a fan serving as an air inlet. Through excellent structural design, the solid metal hydrogen storage bottle is uniformly and stably cooled and heated in an air cooling and air heating mode, so that the temperature requirement of the solid metal hydrogen storage bottle for hydrogen charging and discharging is met. And meanwhile, the hydrogen storage bottle can be quickly pulled and replaced, and the maintenance and operation convenience is improved.

The invention provides a double-rotor direct-drive coaxial reverse-propeller electric ducted fan, which is characterized in that a single motor with an inner rotor and an outer rotor directly drives two pairs of blades, an intermediate transmission device and an inner rotor excitation group to generate a rotating magnetic field, and a first-stage propulsion component and a second-stage propulsion component with the same rotational inertia are driven under the action of electromagnetic torque with the same acting force and counter-acting force; one-way rotation deflection torque is balanced, and coaxial reverse propeller movement is achieved; the rectification duct reduces the induced resistance of the blades and improves the propulsive efficiency, the convergence and expansion guide sleeve and the motor frame body dissipate heat to form circulating heat dissipation of the Brayton heat engine, meanwhile, air is heated, expanded and ejected out to generate thrust, the efficiency is high, and the thrust is large. The dual-rotor motor direct-driven coaxial reverse propeller ducted fan propulsion unit is simple in mechanism, light in structure, large in power-to-weight ratio, high in reliability, beneficial to use in a narrow space and vertical take-off and landing, especially suitable for an EVTOL (electric vertical take-off and landing aircraft), and capable of promoting popularization of small aircrafts and vertical take-off and landing urban transportation carriers.

The utility model relates to the technical field of desulfurization devices, in particular to a desulfurization digester dust removal system with a fluidizing air heating device, which comprises a digester main body internally provided with a cloth bag dust removal device, and the upper part of the digester main body conveys gas back to an absorption tower through a dust remover exhaust fan and a pipeline. The fluidization air pipeline is provided with a fluidization fan for providing fluidization air, the fluidization air pipeline extends into the digester main body and faces the bag-type dust removal device, and a steam heater for heating the fluidization air is arranged on the fluidization air pipeline. According to the utility model, the cloth bag dust removal device in the digester is heated and fluidized by utilizing the heated fluidizing air, and the water vapor content is reduced, so that the problems of cloth bag hardening and water vapor condensation generated in the operation process of the digester are solved.

The invention discloses a 38CrMoAl material and a vacuum nitriding method, and relates to the field of nitriding processes of special-shaped parts, and the nitriding method comprises the steps that S1, after a 38CrMoAlA steel part is put into a furnace, the furnace is filled with air, heating is conducted, pre-oxidation is conducted, and a pre-oxidation workpiece is obtained; s2, vacuumizing, refilling nitrogen, and raising the temperature to a nitriding temperature; s3, after the temperature is increased to the nitriding temperature, ammonia cracking gas is introduced into the furnace for nitriding treatment; and S4, nitrogen removal. And the problem of furnace temperature uniformity in the vacuum nitriding process can be effectively improved. According to different nitriding stages, the concentration of nitrogen atoms in the furnace can be automatically and accurately controlled, the ammonia gas consumption is reduced, and the nitriding layer depth and the nitriding layer quality are improved.