563 results about "Drying tube" patented technology

The present invention relates to the field of sludge drying, and specifically to a sludge multi-stage heat recovery drying device, comprising a drying mechanism, a lower hopper, a material receiving mechanism, a heat recovery mechanism, a drainage mechanism and a storage mechanism; the side wall of the body is connected to a rectangular cylinder with a middle hole fixed on the surface of a bottom plate, and the two inner side walls of the cylinder are relatively equidistant and staggeredly welded with a first drying pipe and a second drying pipe, so as to form an "S"-shaped flue, and sludge is added from the feed hopper to the first drying pipe and the second drying pipe to heat the sludge inside the first drying pipe and the second drying pipe, and the waste heat is utilized in multiple stages, and a material receiving mechanism for receiving leaked feed is welded on the side of the cylinder, which can collect the spilled material on the one hand and recycle the heat on the side of the cylinder on the other hand.

The invention discloses a soil remediation device, and relates to the field of environmental protection, the soil remediation device comprises a remediation cylinder, a supporting roller is fixedly arranged on the circumferential outer wall of the remediation cylinder, a transmission gear is mounted on one side of the supporting roller, a feeding cylinder is fixedly arranged at one end of the remediation cylinder, a connecting disc A is fixedly arranged at the other end of the remediation cylinder, and a drying pipe is inserted into the remediation cylinder in a penetrating manner; a disturbance wall scraping mechanism is fixedly arranged on the outer side wall of the drying pipe, a connecting disc B is fixedly connected to the end of the connecting disc A, a filter cylinder is fixedly connected to the end of the connecting disc B, an air spraying pipe is arranged on the disturbance wall scraping mechanism, a material turning piece is fixedly arranged at the end of the air spraying pipe, and a disturbance piece is fixedly connected to the end of the material turning piece. According to the soil remediation device, the technological process is simplified, and the investment cost is reduced; the heat and mass transfer efficiency is enhanced, the specific surface area of crushed small-particle materials is increased, high-temperature gas can make more sufficient contact with the materials, and thorough drying work is achieved after hardened soil is crushed.

An air-cooled adiabatic heat exchanger for cooling fluids having tube bundles for receiving hot process and rendering cooled fluid, operating in three or four modes. In a dry mode, heat is exchanged with dry air drawn through the tube bundles by fans. In an adiabatic mode, air entering the heat exchanger is adiabatically pre-cooled by water-saturated adiabatic pads, while the tube bundles remain dry. In an evaporative mode, the adiabatic pads remain dry, and the tubes are wetted with evaporative cooling water. In an optional fourth mode, both the adiabatic pads and the tubes are wetted.

The invention relates to the technical field of phosphate drying, in particular to an improved phosphate drying tail gas recovery system. Comprising a spiral feeding machine, a drying cylinder, an air heater, a cyclone separator and a suction fan. The drying cylinder is arranged to be vertical, so that the occupied area of the drying cylinder is reduced, the site cost can be reduced, the production line layout can be optimized, the devices are compact, and installation and operation by operators are facilitated; by arranging a spiral plate, phosphate in the inner barrel can be continuously conveyed from bottom to top by the spiral plate, so that the phosphate can be close to the air inlet pipe, hot air entering the air inlet pipe can quickly dry the phosphate, and the drying uniformity of the phosphate in the drying barrel is guaranteed; the drying efficiency of phosphate is improved, the phosphate close to the air inlet pipe is prevented from being overheated or scorched, and then the drying quality of the phosphate is guaranteed.

The invention discloses a laser gas detection method and system for leakage inspection of a hydrogen-doped natural gas pipeline. Comprising a master control MCU, a signal generation module, a first laser driving temperature control module, a second laser driving temperature control module, a first semiconductor laser, a second semiconductor laser, a wavelength division multiplexer, a standard gas cell, a multi-reflection gas cell, a first photoelectric detection amplifier, a second photoelectric detection amplifier and a digital gas pressure intensity temperature sensor, the device comprises an orthogonal phase-locked amplification demodulation module, an OLED display screen, a vacuum pump, a drying tube, a handheld sampling tube and a porous gas diffusion probe. A laser absorption spectrum technology of time division multiplexing and wavelength modulation is adopted, and a specific implementation mode is that a semiconductor laser with narrow linewidth and adjustable wavelength is utilized, and non-interference accurate detection of methane and hydrogen in leakage inspection of the hydrogen-doped natural gas pipeline is realized through a high-precision time division multiplexing wavelength modulation spectrum absorption detection technology.

The invention relates to the technical field of dust monitoring, in particular to a dust monitoring device and method for environment supervision of a building construction site, and the device comprises a collection cylinder, a filter plate is mounted in the collection cylinder, a plurality of filter holes are uniformly formed in the filter plate, and the inner wall of the collection cylinder is divided into a first cavity and a second cavity by the filter plate; a through groove is formed in the position, located at the bottom of the first cavity, of the collecting barrel, and a drying pipe and an anti-blocking mechanism are further installed on the collecting barrel. Therefore, gas passing through the interior of the drying pipe is heated, the possibility that dust is adhered to the interior of the device due to combination of dust and water vapor in the air in humid weather, and the content of dust in the air is reduced is avoided, and the monitoring precision is improved.

The utility model relates to the technical field of farmland deratization poison bait throwing, and discloses a farmland deratization poison bait throwing device which comprises a storage box and a throwing pipe, a trapezoid block is fixed at the top end in the storage box, a sealing plug is connected in a threaded groove, and handheld rods are fixed on two sides of the top end of a limiting disc. According to the drying device, the notch is formed in the storage box, then the drying pipe is inserted in the notch, the limiting disc is fixed to the top end of the drying pipe, the handheld rods are fixed to the two sides of the top end of the limiting disc, a worker can hold and take the drying device conveniently through the handheld rods, and the threaded groove is communicated with the interior of the drying pipe; according to the drying device, the threaded groove is formed in the storage box, a drying agent is put in the position of the threaded groove, then the sealing plug is installed in the threaded groove for sealing after the sealing plug is rotated, and therefore after the drying pipe is inserted into the storage box, the drying agent can be used for keeping the interior of the storage box in a dry state, and the overall drying capacity is well improved in the working process.

The invention discloses a xanthate throwing type drying machine, and relates to the field of drying equipment, the xanthate throwing type drying machine comprises a drying cylinder, the drying cylinder is provided with a feeding port and a discharging port, the xanthate throwing type drying machine further comprises a supporting cylinder, a rotating piece, a stirring device, a stirring device, a stirring device and a stirring device, the supporting cylinder is fixedly arranged in the drying cylinder, the upper end of the supporting cylinder is coaxially and rotatably connected with a throwing disc, and the drying cylinder is provided with a rotating piece used for driving the throwing disc to rotate; the supporting cylinder is provided with a conveying piece, and the conveying piece is used for lifting xanthate particles at the lower end of the drying cylinder to the position above the throwing disc. The collecting part is located at the discharging port and used for blocking the discharging port, when the collecting part blocks the discharging port, the xanthate particles in the drying cylinder are guided to move towards the conveying part, and when the collecting part unblocks the discharging port, the xanthate particles are guided to move towards the discharging port; and the heating cylinder is arranged on the outer side of the supporting cylinder in a sleeving mode and used for drying the xanthate particles. According to the xanthate particle drying device, the xanthate particle drying effect can be improved.

The invention belongs to the technical field of aerosol measurement, and particularly relates to a system and a method for indirectly detecting solution solute concentration based on a particulate matter sensor. The system is mainly composed of a liquid storage tank, an aerosol generating device, a drying treatment unit and a particulate matter sensor. The method comprises the following steps: during detection, firstly, putting a solution to be detected into a liquid storage tank, carrying out atomization treatment by an aerosol generator, and converting a liquid sample to be detected into uniform aerosol particles; then carrying out dehydration treatment through a drying pipe to form dry solid particles; and finally, detecting the mass concentration of the particulate matters in the dry aerosol in real time by adopting a particulate matter sensor, and calculating the mass of the solute contained in the solution on the basis of a mass conservation principle in combination with the atomization flow parameter of the aerosol generator and the volume of the solution to be detected consumed in the atomization process. Non-contact real-time monitoring is achieved, the problem of solution pollution of a traditional electrode method is avoided, and the method has wide application prospects in the fields of environment monitoring, pharmacy, food safety detection and the like.

The present invention relates to a multifunctional green pepper picking machine, comprising a mobile device, a drying and picking device, a collecting and transmitting device, a screening device and a terminal collecting device; the drying and picking device, the collecting and transmitting device and the screening device are sequentially installed on the mobile device from back to front, and the terminal collecting device is installed on the mobile device and is located below the screening device; the drying and picking device dries pepper grains by microwaves, and picks grains by a picking mechanism that moves axially in a drying cylinder, and outputs pepper grains through a discharge port of the drying cylinder; the collecting and transmitting device transports pepper grains to the screening device by negative pressure adsorption, and the screening device realizes the screening of pepper shells and pepper grains by inner and outer cylinders and two screening rollers, and transports pepper shells and pepper seeds to two storage areas on a straight screen through two outlets; the straight screen vibrates left and right, so that the pepper shells and pepper seeds fall into two spaces in a terminal collecting bin respectively. The present invention realizes the integrated production of drying, picking, shell and seed screening and separate collection.

A fluid pumping system may comprise a pump and a fluid line state detector having, a receptacle, at sensor, and an illuminator. The system may further comprise a fluid transfer set including an output line for mating into the receptacle. The system may further comprise a controller in data communication with the fluid line state detector configured to power the illuminator and monitor an output signal of the sensor when the outlet line is in the receptacle to determine a dry tube light intensity value. The controller may be further configured to govern operation of the pump to prime the output line with fluid. The controller may be further configured to power the illuminator, monitor the output signal, and halt operation of the pump when the output signal indicates the light intensity value has dropped below a primed line threshold which is dependent upon the dry tube intensity value.

The utility model relates to the field of scutching machines, in particular to a scutching machine for knitted fabric production and processing, which comprises a rectangular processing table, a first driving motor is mounted on one side of the processing table, a rectangular plate is fixedly connected to the top of the processing table, and a supporting rod is fixedly connected to one side of the rectangular plate. When the knitted fabric drying device is used, hot air generated by a steam pump enters the drying cylinders through an air conveying pipe, the upper drying cylinder and the lower drying cylinder can dry the upper face and the lower face of knitted fabric at the same time, the drying efficiency is improved, a second driving motor drives a second two-way screw to rotate, and the second two-way screw drives moving plates to be close to or away from each other. The moving plate drives the drying cylinders to get close to or away from each other, the drying efficiency is improved, the distance between the drying cylinders can be adjusted according to moisture on the knitted fabric, drying is accelerated, and meanwhile the situation that the quality of the knitted fabric is affected by too high temperature due to too close is avoided.

The utility model discloses a cable surface dewatering device for a cable production line, comprising a drying box, a hot air drying mechanism, a pretreatment mechanism and a heating dryer, wherein the left side of the drying box is provided with a hot air drying mechanism extending to the inside thereof, the top of the drying box is provided with a heating dryer, the right side of the drying box is provided with a pretreatment mechanism, and the pretreatment mechanism comprises: an exhaust pipe, a preheating pipe, a transmission plate, a driving motor and a cam, the upper end of the exhaust pipe is connected to the drying box, the lower end of the exhaust pipe is connected to the preheating pipe, a transmission plate fixed to the drying box is fixed on one side of the preheating pipe, the driving motor is installed on the outside of the drying box, a cam is installed on the output shaft of the driving motor, and the cam is directly opposite to the transmission plate. The utility model reduces the moisture attached to the cable surface through vibration pretreatment, and at the same time, preheats the cable by recovering high-temperature steam to increase the temperature of the moisture on the cable surface, so that the drying speed is faster and time is saved.

The invention discloses a portable gas taking device and method for a finished cable buffer layer. The device comprises a gas taking valve, a gas pump, a drying pipe and a gas taking bag. Wherein an air taking opening of the air taking valve is used for being connected with an air taking hole of a cable, an air outlet of the air taking valve is connected with an air inlet of the air pump, an air outlet of the air pump is connected with an air inlet of the drying pipe, and an air outlet of the drying pipe is connected with the air taking bag. The detection device has the characteristic of plug and play, can be directly installed in a buffer layer of a finished cable for detection, and is simple and convenient to operate. By adopting the gas sampling device disclosed by the invention, various volatile byproducts, including methane, water, cumyl alcohol, acetophenone and the like, in the cable can be detected at the same time, and the residual condition of the byproducts after degassing treatment can be accurately reflected.

The invention discloses a pretreatment system and an automatic measuring method suitable for measuring the mole fraction of carbon dioxide in a water body through a water-gas balance method, and relates to the field of gas analysis and measurement, the pretreatment system comprises an automatic condensation water removal system, a gas valve automatic switching system, a control system and PC end upper computer software; the automatic condensation water removal system adopts a semiconductor condenser and a Nafion drying pipe to remove water; the gas valve automatic switching system automatically switches standard gas and balance gas through a valve; the control system is connected with the gas valve automatic switching system and PC end upper computer software, monitors and adjusts the gas flow rate in real time, and ensures that the gas flow rate is within a preset range; the upper computer software of the PC end integrates data processing and visualization functions, and automatic control and real-time data recording and analysis of the whole system are achieved. The system is reasonable and simple in structure, easy to carry and install, easy and convenient to use, stable in operation and capable of visually displaying the change trend of the CO2 mole fraction in a research area in real time.

The utility model relates to the technical field of oilfield associated gas, and discloses an oilfield associated gas drying and cooling device which comprises a drying and cooling box, a gas inlet pipe is arranged on the outer wall of one end of the drying and cooling box, a gas outlet pipe is arranged on the outer wall of the other end of the drying and cooling box, and a cooling device for cooling associated gas is arranged at one end of the gas inlet pipe. A drying pipe is arranged at one end of the cooling device, a drying treatment mechanism for drying associated gas is arranged in the drying pipe, a discharging mechanism is arranged at the bottom of the inner wall of the drying cooling box, a gas outlet pipe is arranged at one end of the drying treatment mechanism, and supporting legs are fixed to the four corners of the bottom of the drying cooling box. The drying treatment mechanism is arranged, at the moment, a connecting rod can drive an arc-shaped sliding door to slide in an arc-shaped sliding groove by operating a motor, at the moment, molecular sieve adsorbents can fall into a material collecting box, and then the effects of drying treatment on associated gas and rapid replacement of the molecular sieve adsorbents are achieved.

The invention discloses a coal preparation plant workshop multi-mode dust particle detection system and method. According to the system, a dust monitoring unit comprises a dust monitoring chamber, a continuous collection mechanism, a continuous detection mechanism and a cleaning mechanism; the continuous collection mechanism comprises a turnover motion assembly, a collection plate, a micro oscillation motor, a drying pipeline, a mass flow controller and a flow pump; the two collecting plates are oppositely mounted at the upper end and the lower end of the supporting frame up and down, and micro oscillation motors are mounted on the opposite surfaces; the drying pipeline is connected in series with the middle section of the chamber air inlet pipeline; the mass flow controller and the flow pump are positioned in the dust monitoring chamber and are sequentially connected in series to the gas outlet pipeline of the chamber; the continuous detection mechanism comprises a CCD module, a Raman laser, an LIBS laser and a spectrometer; the cleaning mechanism comprises a particulate matter collecting device, a cleaning air hole, a flow pump and a mass flow controller; the method comprises the steps of preparation work; debugging the system; monitoring dust particles; and ending the monitoring operation. According to the system and the method, the dust particle detection operation can be continuously realized.

The utility model discloses a water and CO2 removal device which comprises a CO2 removal mechanism and a water removal mechanism which are sequentially connected through a sample conveying pipeline, the CO2 removal mechanism at least comprises a CO2 adsorption pipe with an inner cavity filled with CO2 adsorbents, and the water removal mechanism at least comprises a Nafion drying pipe. The utility model further discloses a volatile organic compound detection system which comprises an automatic sample injector, a pre-concentration device and a detector, and the water and CO2 removal device is arranged between the sample injector and the pre-concentration device. The device has the advantages that the structure is simple, the moisture and CO2 removal rate is improved, and the detection result of the detector is more accurate and reliable.

The invention relates to the technical field of casing drying, in particular to a casing drying box with an extrusion structure. Comprising a box body, plug connectors distributed in a rectangular array are fixedly connected into the box body, fixing pieces distributed at intervals are slidably connected to the plug connectors, the fixing pieces distributed at intervals are jointly and fixedly connected with a drying pipe, and a supporting switching unit is arranged on the drying pipe; the supporting switching unit comprises first supporting air bags distributed in the circumferential direction in an array mode, the first supporting air bags distributed in the circumferential direction in the array mode are all arranged on a drying pipe, second supporting air bags distributed in the circumferential direction in the array mode are arranged on the drying pipe, and a first air conveying pipe and a second air conveying pipe are fixedly connected to the drying pipe. The casing is supported in a switching manner through the first supporting air bag and the second supporting air bag, the inner side and the outer side of the casing are dried at the same time in cooperation with the box body, meanwhile, the contact position of the inner wall of the casing is prevented from being unchanged all the time in the drying process, and therefore the drying uniformity is improved, and the water vapor retention probability is reduced.

The utility model discloses an outdoor emergency power supply, which relates to the field of hydrogen energy power supplies, aims to solve the problems of complex structure, cumbersome operation and poor portability in the prior art, and adopts the technical scheme that the outdoor emergency power supply comprises a main shell, a reaction bin is arranged in the main shell, a solid hydrolysis hydrogen production material is arranged in the reaction bin, and the reaction bin is connected with a water tank and a hydrogen conveying pipeline. The hydrogen conveying pipeline is connected into the water tank, the upper portion of the water tank is connected with the fuel cell after being connected with the drying pipe through a pipeline, the fuel cell is electrically connected with the control system, and the control system is electrically connected with the lithium battery, the power management module and the load. The device is simple in structure, can be used only by adding reactants and starting the water pump, is simple and convenient to operate, is integrated in the main shell, and is good in integration degree and convenient to carry.

The invention relates to the technical field of transformers, and provides a moisture-proof dry-type transformer which comprises a transformer shell, a transformer body is fixed in the transformer shell, and a mounting plate is fixed to the rear wall of the transformer shell through bolts; the mounting shell is fixed to the rear wall of the mounting plate, and an inner cavity of the mounting shell is divided into a driving chamber on the upper portion and a drying chamber on the lower portion through a partition plate; the mounting assemblies are symmetrically and rotationally mounted in the drying chamber, and drying pipes are symmetrically mounted on the mounting assemblies; the driving assembly is arranged in the driving chamber, and the driving assembly is used for driving the mounting assembly to rotate; by means of the technical scheme, the problems that the interior of an existing dry-type transformer is generally dehumidified by arranging a drying agent, but the drying agent can absorb water to be saturated after being used for a long time and needs to be replaced frequently, operation is tedious, and the use cost is high are solved.

The present invention discloses a maintenance-free intelligent respirator with an oil cup for a transformer, which relates to the technical field of transformers, and includes a first respirator, a second respirator and an electric control box. The tops of the first respirator and the second respirator are respectively connected to a main pipe connected to the oil pillow through a branch pipe. The first respirator and the second respirator both include an observer, a dryer and an air nozzle that are detachably connected from top to bottom. An oil cup is provided in the observer, a heating component is provided in the drying cylinder of the dryer, and a blowing component is provided between the electric control box and the observer. The present invention adopts a maintenance-free intelligent respirator with an oil cup for a transformer of the above structure, which can prevent the oil in the oil cup from contaminating the silica gel by setting the oil cup on the top of the dryer, and at the same time use the oil to play the role of insulation and filtering micro-water, and increase the dehumidification efficiency of the silica gel by setting a blowing component and a rotatable heating component.

The utility model discloses a silver-plated copper wire drying device which comprises a base, a drying cover body is installed on the upper side of the base, a wire inlet is formed in one side of the drying cover body, a wire guide wheel is arranged on the portion, on the outer side of the wire inlet, of the drying cover body through a supporting frame, and a winding roller is rotationally arranged in the drying cover body through a winding shaft. An upper drying pipe and a lower drying pipe which are located on the upper portion and the lower portion of the conveying axis are arranged in the side, close to the wire inlet, of the drying cover body, one end of the upper drying pipe and one end of the lower drying pipe are connected with an air blower through an air conveying pipe and an electric heating wire, and a water scraping mechanism is arranged in the wire inlet. According to the silver-plated copper wire water scraping device, water scraping treatment can be conducted on the exterior of a silver-plated copper wire, large water drops are scraped off, then water left outside the silver-plated copper wire can be dried through the upper drying pipe and the lower drying pipe arranged in the drying cover, drying thoroughness is high, and the drying speed is high.

The invention relates to the technical field of ABS plastics, in particular to nano-antibacterial ABS plastic preparation equipment and a preparation method.The nano-antibacterial ABS plastic preparation equipment comprises a drying cylinder, the drying cylinder is rotationally connected with gear discs, a connecting shaft is fixedly connected between the two gear discs, the connecting shaft is symmetrically and fixedly connected with a shoveling plate assembly, an air inlet cover is fixedly connected with a fixing ring, and the fixing ring is provided with a gear tooth set; materials deposited at the bottom of the drying cylinder can be shoveled through the shoveling plate assembly, then after the shoveling plate assembly rotates to a certain angle, the rotating gear is meshed with the gear tooth set, the shoveling plate is driven to turn over gradually and be opened, and therefore the materials on the shoveling plate assembly fall off gradually, and the materials on the drying cylinder are separated from the drying cylinder along with continuous turning of the shoveling plate assembly. According to the ABS plastic drying device, part of materials which do not fall off are overturned to the highest position and then freely fall off, in this way, the materials fall off in batches, the materials can be more dispersed, meanwhile, hot air is evenly injected into the drying cylinder in cooperation with the air inlet cover and the vent holes, wet air is discharged out of the air outlet cover, and in this way, ABS plastic is efficiently dried.

The present invention discloses a methane calcium chain reforming single fluidized bed reaction system and reaction method, comprising a cylindrical quartz tube filled with reaction particles, an adjustable light source located beside the cylindrical quartz tube with its radiation focus located at the top center of the reaction particles, a thermal insulation layer wrapped around the outside of the cylindrical quartz tube, a position adjustment device for driving the cylindrical quartz tube to move and rotate, thermocouples uniformly distributed within the cylindrical quartz tube, a gas distribution system for supplying reaction gas into the cylindrical quartz tube, a mass spectrometer connected to the gas outlet of the cylindrical quartz tube via a drying tube, and a control system connected to the thermocouple, the gas distribution system, and the mass spectrometer, respectively. The thermal insulation layer is provided with an inlet on the side facing the adjustable light source. The present invention aims to achieve efficient energy absorption and conversion while reducing heat dissipation, capturing CO2 while obtaining high-value-added hydrocarbon fuels.

The invention relates to the technical field of drying equipment, and provides galvanized steel pipe drying equipment aiming at the problem that traditional galvanized steel pipe drying efficiency is low, and the galvanized steel pipe drying equipment comprises a drying mechanism, a feeding mechanism and a storage mechanism; the drying mechanism comprises a drying groove and an air knife, and the air knife is supported above the drying groove; the feeding mechanism comprises a feeding conveying belt and a first transferring assembly, the feeding conveying belt is used for conveying to-be-dried pipe bodies, and the first transferring assembly is arranged close to the output end of the feeding conveying belt and used for transferring the to-be-dried pipe bodies from the feeding conveying belt to the drying groove; the storage mechanism comprises a collecting box, and the collecting box is arranged close to the drying groove. And a second transferring assembly is further arranged on the drying groove and used for transferring the dried pipe bodies from the drying groove to the collecting box. The galvanized steel pipe drying device has the effect of improving the galvanized steel pipe drying efficiency.

The invention discloses a method and a device for measuring the moisture content of atmospheric environment aerosol. According to the invention, a drying tube, a first optical particle spectrometer and a second optical particle spectrometer are adopted to obtain dry and non-dry particle size distribution of the aerosol, a moisture absorption growth factor is obtained through inversion by using the measured particle size spectrum distribution of the whole aerosol, and then the particle size of the aerosol after moisture absorption growth under environmental humidity is calculated according to a Kappatrah theoretical formula. Further obtaining the water content of the environmental aerosol; a differential electromigration analyzer is not adopted, so that the instrument cost is remarkably reduced; a humidifying unit is not needed to control the humidity of the instrument equipment, so that the maintenance difficulty is obviously reduced; according to the inversion method, the moisture absorption growth factor is obtained through inversion by means of the measured particle size spectrum distribution of the whole aerosol, then the moisture content of the aerosol is obtained through calculation, and the error is smaller.

The utility model relates to a layered distribution vacuum freeze dryer, the working principle of the freeze dryer is mainly based on three steps of pre-freezing, sublimation and analysis, a pre-freezing bin receives cold air of a refrigerating main machine of a refrigerating machine through a bin main body to quickly freeze a to-be-dried substance at low temperature to form solid ice crystals, and a layered drying pipe can depend on a vacuum device, so that the drying efficiency is improved. A vacuum environment is formed in an inner cavity of the layered drying pipe, under the vacuum environment and the temperature monitoring of a temperature sensor, a heater enables a heating wire to conduct heating, ice crystals directly sublimate into water vapor instead of passing through a liquid state, the temperature in the layered drying pipe is further increased, and a small amount of water combined on the surface of a substance is removed; the layered drying pipe adopts a step-by-step vacuumizing mode, so that the defect that the traditional vacuum freeze drying equipment is relatively high in energy consumption is overcome.

This application relates to a paper printing dryer, comprising: a support frame; two side plates disposed opposite to each other at the top of the two support frames; a conveyor disposed between the two side plates; the conveyor including a conveyor belt with multiple ventilation holes; a drying chamber disposed between the tops of the two side plates; multiple sets of drying pipes disposed inside the drying chamber; and an air supply unit disposed on the drying chamber; and an adsorption mechanism comprising a housing disposed between the two side plates; multiple exhaust fans disposed inside the housing. This application, through the combined use of the drying chamber, the air supply unit, and the multiple sets of drying pipes, can comprehensively and efficiently dry the ink on paper products. The negative pressure generated by the exhaust fans of the adsorption mechanism adsorbs the paper products through the ventilation holes, effectively preventing the edges of the paper products from turning over due to gas blowing, thus improving the quality of the printed products.

The utility model discloses a laboratory drying oven for coating products, and belongs to the technical field of drying equipment. The drying oven comprises a drying oven main body, a porous plate and a supporting seat in the drying oven main body, a heating assembly at the bottom and a temperature and humidity sensor on the wall. The drying oven is characterized in that an air outlet seat and a negative pressure fan are arranged above the drying oven main body, a reversing air valve is connected through an air outlet pipe, two output ends of the reversing air valve are respectively connected with a drying pipe and a humidifying pipe, and the two pipes are finally converged at an air inlet pipe and led to an air outlet disc in the oven. A detachable drying cylinder filled with silica gel is arranged at the middle section of the drying pipe; the middle section of the humidifying pipe is connected with a Venturi pipe in series, and the throat portion is connected into the ultrasonic humidifying assembly through a connecting pipe. The utility model solves the problem that the conventional laboratory oven is difficult to simulate a complex variable humidity drying process, integrates drying and humidifying functions, and is particularly suitable for research and development and quality detection of coated products with accurate requirements on drying curves.