532 results about "Cold trap" patented technology

The invention discloses a multifunctional integrated gas control system for a dilution refrigerator, and particularly relates to the field of refrigeration and low-temperature engineering, which comprises a liquid nitrogen cold trap, a gas buffer tank, an integrated valve box, a dilution refrigeration internal circulation pipeline, a diaphragm compressor, a roots pump, a turbo molecular pump and a vacuum suction pump set. According to the system, a highly-integrated valve box module is used and is responsible for implementing gas circuit control on different stages such as dilution refrigeration cycle starting, operation and shutdown rewarming; according to the invention, conductance optimization and heat loss reduction are carried out on gas paths with different temperature zones and different pressures, high air tightness of a full temperature zone from room temperature to extremely low temperature is ensured, the reliability and the automation degree of the dilution refrigerating machine are improved, and very positive significance is provided for practicability of a dilution refrigerating system.

Thermal management systems include a vapor cycle and a liquid cycle sharing a common working fluid. The vapor cycle includes, along a vapor cycle flow path, a compressor and a condenser. The liquid cycle includes, along a liquid cycle flow path, a fluid driver, a load, a regulator valve, and a phase change material heat exchanger. A cold sink is thermally coupled to a heat load. A separator is configured to separate liquid and vapor portions of the working fluid and direct the liquid into the liquid cycle and the vapor into the vapor cycle. The separator is part of both the vapor cycle and the liquid cycle. The regulator valve controls a temperature of the working fluid within the liquid cycle at a location upstream of the phase change material heat exchanger to control a mode of operation of the phase change material heat exchanger.

The invention discloses a winter jujube fruit fresh-keeping processing device, and belongs to the technical field of fruit fresh-keeping processing. The device is composed of a freeze-drying structure and a cold trap structure, the freeze-drying structure integrates quick freezing and freeze-drying functions, and the cold trap structure is connected with a vacuum system; during working, pretreated winter jujubes are placed on a specific storage plate frame and are quickly frozen in a quick-freezing bin of a freeze-drying structure, meanwhile, the internal special structure drives a liquid material to circulate to assist ice crystallization, ice crystals push the storage plate frame to enter the freeze-drying bin, automatic connection from quick freezing to freeze-drying is achieved, and after the winter jujubes enter the freeze-drying bin, related parts are matched to start vacuum and other systems, and the winter jujubes are quickly frozen. Performing freeze-drying and fresh-keeping processing on the winter jujubes; the device avoids loss of transfer cold energy, guarantees freeze-drying quality of winter jujubes, optimizes early-stage preparation of freeze-drying, improves fresh-keeping processing efficiency, and can also automatically clean ice crystals and adherends, prolong the service life of equipment and reduce maintenance cost.

The utility model belongs to earth and planet chemical instrument equipment, and discloses a Nano-C isotope analysis device which comprises an element analysis system, a carbon dioxide freezing enrichment system and an isotope mass spectrometry system, the carbon dioxide freezing enrichment system comprises a six-way valve, the six-way valve is communicated with a first freezing assembly and a second freezing assembly, and the second freezing assembly is communicated with the isotope mass spectrometry system; the first freezing assembly comprises a first freezing container, and a first cold trap communicating with the six-way valve is arranged in the first freezing container in a liftable mode. The second freezing assembly comprises a second freezing container, and a second cold trap communicating with the six-way valve is arranged in the second freezing container in a liftable mode. The carbon isotope analyzer is simple and compact in mechanism, convenient to use, capable of analyzing carbon elements in different forms and accurately measuring isotope composition of carbon in different forms at the nanomole level, capable of enriching and purifying a sample to be detected for multiple times, capable of reducing analysis errors and capable of improving measurement sensitivity and precision.

The invention provides a working medium purifying device and a refrigerating system, the working medium purifying device is suitable for purifying a working medium of refrigerating equipment, and the working medium purifying device comprises a cold trap mechanism which comprises a cold trap main body which is installed on a cold head of a first refrigerating machine and forms heat conduction with the cold head so as to be cooled by the cold head to a first temperature suitable for adsorbing impurities; the vacuum cover covers the outer side of the cold trap main body, and a vacuum cavity suitable for being pumped to be in a vacuum state is limited in the vacuum cover, so that the cold trap main body is thermally isolated from the external environment; the pipeline mechanism comprises a first branch which is suitable for arranging the cold trap main body on a circulating pipeline of the refrigeration equipment to be purified in parallel and is configured to be selectively communicated with the circulating pipeline; and the desorption mechanism is configured to respond to the cut-off state of the first branch, heat the cold trap main body to a second temperature suitable for desorbing the impurities, and extract the impurities in the cold trap main body.

The invention discloses a detection device and a detection method for dissolved gas in insulating oil. The detection device comprises a rapid degassing module and an analysis module, the rapid degassing module comprises a sample bottle, a heating oil sample pool, a stirring structure, a high-purity gas storage tank and a cold trap; the sample bottle is used for injecting an insulating oil sample to be detected; the heating oil sample pool is used for heating the insulating oil sample in the sample bottle; the stirring structure is used for stirring the insulating oil sample in the sample bottle; the high-purity gas storage tank is used for introducing inert gas into the sample bottle and accelerating discharge of dissolved gas; the cold trap is used for enriching the mixed gas discharged from the sample bottle and selectively adsorbing and enriching the target gas to be detected; and the analysis module is used for detecting the gas analyzed from the cold trap. According to the detection device disclosed by the invention, the insulating oil sample to be detected is simultaneously subjected to heating stirring, gas purging replacement and cold trap enrichment, so that the dissolved gas in the insulating oil can be quickly removed, the degassing time is shortened to be within 5min, and the degassing treatment efficiency is greatly improved.

The invention provides a vacuumizing system and a cold trap thereof. The cold trap comprises an inner container, a first shell and a second shell which are sequentially arranged at intervals from inside to outside. A storage cavity used for containing a low-temperature medium is formed in the inner container in a hollow mode. The outer side face of the inner container forms a first cold face. The inner side face of the first shell and the outer side face of the inner container are enclosed to form a gas flow interlayer for gas to flow. The first shell is provided with an air inlet and an air outlet which are communicated with the airflow interlayer. A containing cavity is defined by the inner side face of the second shell and the outer side face of the first shell, the containing cavity is used for containing a low-temperature medium, and a second cold face is formed by the inner side face of the first shell. The first cold surface and the second cold surface are formed in the cold trap at the same time, so that the cold surface area of the cold trap is increased, the temperature difference between the inner side and the outer side of the airflow interlayer can be balanced, the guiding effect of the cold trap on the gas is enhanced, the adsorption and trapping capacity of the cold trap on impurity gas molecules in the gas is enhanced, and therefore the efficiency of the cold trap is improved.

The invention discloses a low-temperature cold trap water removal device which comprises more than two water removal channels which are connected in parallel; each water removal channel comprises a refrigeration water removal gas path and an ice melting purging gas path which are connected in series; each refrigeration and water removal gas path is also connected with an inlet of a dry gas collection gas path, and an outlet of the dry gas collection gas path is used for being connected with an analyzer; and each water removal channel is connected with a controller, and the controller is used for controlling the refrigeration water removal gas paths and the ice melting purging gas paths of the different water removal channels to operate in a staggered mode. According to the application, moisture in the gas to be dewatered can be effectively removed, frost can be timely removed, and related phenomena such as relatively large dead volume of the cold trap can be avoided.

The invention discloses a phosphorus trifluoride production device and method, and belongs to the technical field of phosphorus trifluoride production, the device comprises a reaction part, a pretreatment part and a post-treatment part, the reaction part comprises a first raw material tank, a second raw material tank, a reaction kettle and a collection cold trap, the pretreatment part comprises a primary separation tower and an absorption tower, and the post-treatment part comprises a secondary separation tower and an absorption tower. The post-treatment part comprises an adsorption tower, a light component removal tower and a heavy component removal tower; the production method comprises the following steps: adding raw materials of phosphorus trichloride and hydrogen fluoride into a reaction kettle to generate phosphorus trifluoride and hydrogen chloride, collecting the phosphorus trifluoride and hydrogen chloride in a collecting cold trap, heating the collecting cold trap to vaporize the phosphorus trifluoride and hydrogen chloride, and sequentially entering a primary separation tower, a light component removal tower and a heavy component removal tower for a series of treatment, and finally, high-purity phosphorus trifluoride gas is extracted from the heavy component removal tower to a filling system. According to the method, high-purity phosphorus trifluoride with the purity larger than or equal to 99.999% can be finally produced, and the problem that in the prior art, the purity of phosphorus trifluoride is not enough is solved.

The utility model provides a gas purification device and a gas purification system, and the gas purification device comprises a cold trap mechanism which comprises a cold trap main body which is installed on a cold head of a first refrigerating machine and forms heat conduction with the cold head so as to be cooled by the cold head to a first temperature suitable for adsorbing impurities; the vacuum cover covers the outer side of the cold trap main body, and a vacuum cavity suitable for being pumped to be in a vacuum state is limited in the vacuum cover, so that the cold trap main body is thermally isolated from the external environment; the pipeline mechanism comprises a first branch which is suitable for arranging the cold trap main body on a circulating pipeline of a gas source to be purified in parallel and is configured to be selectively communicated with the circulating pipeline; and the desorption mechanism is configured to respond to the cut-off state of the first branch, heat the cold trap main body to a second temperature suitable for desorbing the impurities, and extract the impurities in the cold trap main body.

The utility model discloses a vacuum centrifugal concentrator which comprises a machine frame shell, a middle partition plate is fixed between the inner walls of the two sides of the machine frame shell, a driving motor is arranged below the middle partition plate, a vacuum pump and a low-temperature cold trap are arranged on the two sides of the driving motor respectively, and a casting aluminum pot is further arranged in the machine frame shell. A touch control integrated screen and a pull-push door handle are further arranged on the top of the machine frame shell, and a damping device is further arranged on the middle partition plate. According to the vacuum centrifugal concentrator, a large sealed casting aluminum pot is vacuumized, a horizontal rotor is adopted to perform rotary centrifugation on a sample, a refrigeration sheet and a far infrared heating tile are mounted in the aluminum pot, and a cold trap is externally arranged to capture and prevent biological pollution, so that the problems of temperature control and explosion boiling of the sample in the concentration process are solved, and the concentration effect is ensured; and meanwhile, refrigeration and infrared heating can be realized, so that various experimental requirements of freeze-drying, concentration and the like are met, and the concentration efficiency is greatly improved.

A cooling system includes a liquid loop, a vapor compression loop, and a heat exchanger in fluid communication with each of the liquid loop and the vapor compression cycle loop. The liquid loop includes a cold sink for cooling a heat load. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator, which is configured to separate a two-phase form of a working fluid received from the cold sink into a vapor form of the working fluid and a liquid form of the working fluid.

The invention discloses an off-line carbonate cluster isotope sample preparation system and preparation method, the system adopts a main controller and a plurality of sub-controllers to work cooperatively, parameters such as temperature, pressure, gas flow direction and the like are accurately controlled, and the stability and repeatability of sample preparation are ensured; an SPR gas sensor and a fluorescent gas sensor are arranged, CO2 concentration and pressure changes are monitored in real time, accurate data support is provided for a main control machine, and dynamic adjustment and optimization are achieved; a multi-stage cold trap design is adopted, and liquid nitrogen and a methanol-liquid nitrogen mixture are combined for cooling, so that impurity gas is effectively separated, and high purity of final CO2 gas is ensured; the system adopts a modular design, is simple and convenient to operate, is easy to maintain and upgrade, and has good expansibility and universality.

The invention relates to the technical field of environment gas pretreatment analysis, and discloses a low-concentration atmosphere VOCs sampling pretreatment device and method. The pretreatment device comprises a cold trap module which at least comprises two cold trap units working independently, each cold trap unit is composed of a stainless steel pipeline and provided with a temperature control module, the temperature adjusting range is-196 DEG C to 250 DEG C, and the cold trap module is used for adsorbing VOCs and moisture in a sample at low temperature and desorbing target VOCs at high temperature; the refrigerating system comprises a semiconductor thermoelectric refrigerating device which is mixed with a mechanical refrigerating unit and is used for controlling the adsorption temperature of the cold trap module; and the flow control module is used for realizing constant-current sampling by adopting an electronic metering algorithm, and the flow regulation range is 0-100mL / min. According to the method disclosed by the invention, two-section cold trap step-by-step condensation is adopted, and water is directionally removed in combination with blowback airflow, so that the recovery rate of VOCs is increased, the residual quantity of water is lower than 50ppm, and the peak shape symmetry and data reproducibility of GC-MS detection are remarkably improved.

The utility model provides a multi-layer cold trap device. The multi-layer cold trap device comprises a first shell, a second shell, a third shell, an air inlet pipe and an air outlet pipe, wherein the second shell is arranged in the first shell, and a medium space is formed between the first shell and the second shell. A medium cavity is formed in the third shell, the third shell is arranged in the second shell, and a flowing space is formed between the second shell and the third shell. The air inlet pipe and the air outlet pipe are respectively communicated with the flowing space, so that extracted air can sequentially flow along the air inlet pipe, the flowing space and the air outlet pipe. Low-temperature media are placed in the medium space and the medium cavity at the same time, cold faces are formed on the inner wall of the second shell and the outer wall of the third shell, namely, double cold faces are formed in the flowing space, the area of the cold faces in the flowing space is enlarged, and the contact area of the cold faces and gas flowing through the flowing space is enlarged. Furthermore, gas molecules flowing through the flowing space are captured, the adsorption capacity of the cold trap is improved, and the vacuumizing efficiency is improved.

A testing device for measuring oil, gas and water contents in rock has a heating desorption unit that has a sample chamber for placing a rock sample to be detected, a crushing mechanism arranged within the sample chamber, and a heating mechanism. The heating desorption unit crushes and heats the rock sample in a sealed manner to achieve gas analysis and desorption analysis of oil and water contained therein, thus obtaining components to be detected. The device further has a cold trap collection unit in communication with the sample chamber, a light hydrocarbon capture unit in communication with the cold trap collection unit, a gas measuring unit in communication with the light hydrocarbon capture unit for measuring and calculating a gas volume; and a central control unit for controlling the testing device.

The utility model discloses a process parameter experiment and selection device for harmless treatment of chemical waste salt, which comprises a reaction furnace, a movable reaction device, a gas inlet pipe, a gas cylinder, a gas outlet pipe, a cold trap and a gas analyzer, the movable reaction device is mounted at an opening in the lower end of the reaction furnace through a sealing flange, and comprises a sample bearing part for feeding a sample into the reaction furnace; a gas inlet pipe is arranged in the movable reaction device, and the gas cylinder is connected with a gas inlet of the gas inlet pipe and used for inputting reaction atmosphere into the reaction furnace; gas generated by the reaction of the sample in the reaction furnace is output through an upper end gas outlet pipe; the cold trap is used for cooling and filtering gas generated by reaction; and the gas analyzer is connected with the cold trap and is used for performing component analysis on the gas filtered by the cold trap. According to the utility model, technological parameters of harmless treatment can be quickly determined by using a small amount of waste salt.

The invention relates to a preparation process of a fluorination liquid, in particular to a preparation method and device of perfluorohexane, and the preparation method comprises the following steps: mixing hexafluoropropylene and fluorine-containing gas for reaction to obtain crude perfluorohexane; the method comprises the following steps of: performing primary alkali washing and secondary alkali washing on a crude product of perfluorohexane, removing moisture, and finally performing primary condensation and secondary condensation to obtain the product of perfluorohexane by primary condensation and recover hexafluoropropylene for circular reaction by secondary condensation. The preparation device comprises a reaction tower, a buffer tank, a primary alkaline washing tower, a secondary alkaline washing tower, a drying tower, a first cold trap and a second cold trap which are communicated in sequence. The method is simple in production process, high in hexafluoropropylene conversion rate, high in product purity and low in comprehensive cost, and has good economic benefits and application prospects.

The present invention belongs to the technical field of liquid freezing point detection equipment, and in particular, relates to a freezing point detection device for detecting the preparation of styrene true polymerization inhibitor, including a detector body, two cold traps are symmetrically provided on the top of the detector body, and a refrigeration box is provided on the inner side of the detector body, an outer test tube is inserted into the cold trap, and an inner test tube is inserted into the inner side of the outer test tube. The present invention is provided with a protective component, and before removing the detection probe, the pull rod can be pulled to drive the stirring ring to move upward into the detection probe, and as the stirring ring enters the detection probe, the rubber sleeve can drive the bottom edge of the rubber sleeve to be close to the inner wall of the side of the detection probe under the joint action of the first support rod and the second support rod, so that the stirring ring and the oil attached to its surface can be isolated in the detection probe by the rubber sleeve, thereby preventing the oil attached to the stirring ring from dripping randomly when the detection probe is removed.

The invention relates to a preparation method of antimony pentafluoride, which comprises the following steps: preheating raw material gas nitrogen trifluoride, placing nitrogen trifluoride and antimony powder in a tubular furnace reactor made of a specific material, carrying out gradient heating reaction at 300-400 DEG C under the condition that the antimony powder is distributed by adopting a multi-layer nickel plate tiled structure, carrying out reaction for 10-40 seconds, and carrying out solid filtration through a filter after the reaction is completed, so as to obtain the antimony pentafluoride. And carrying out cold trap collection to obtain an antimony pentafluoride product. The diameter of the reactor is made of a nickel material or Monel to prevent corrosion of antimony pentafluoride, the number of tiled layers of nickel plates is r / 5-r / 10, the contact area is increased, the reaction yield is increased, and the utilization rate of the raw material nitrogen trifluoride is increased.

The invention discloses a method for synergistically extracting vanadium oxytrichloride, gallium trichloride and iron-titanium alloy from vanadium slag, and belongs to the field of recycling of complex multi-metal resources. The method comprises the following steps: uniformly mixing the gallium-containing vanadium slag, carbon and chlorinated waste salt according to a certain proportion, and carrying out vacuum melting treatment to obtain a Fe-Ti alloy; then chlorine is introduced for chlorination treatment, and a gaseous product is obtained; the gaseous product is adsorbed by a molecular sieve with a function of selectively adsorbing VOCl3 to obtain VOCl3, and then GaCl3 is obtained through a cold trap. According to the method, efficient collaborative conversion and recovery of multi-metal resources of vanadium, gallium, iron and titanium in the vanadium slag are achieved, and the problems that multi-metal collaborative extraction in existing vanadium slag is difficult, and the separation efficiency is low can be effectively solved.

The invention relates to the field of modern processing of traditional Chinese medicines, and particularly provides a low-temperature crushing preparation process and application of a traditional Chinese medicine composition. According to the process, medicinal materials are pre-frozen at the temperature of-40 DEG C to-30 DEG C to be subjected to glassy transition, and the synergistic effect of vortex airflow crushing and a high-frequency ultrasonic field under the protection of liquid nitrogen is combined, so that the crushing temperature is controlled to be less than or equal to-30 DEG C, and the ultrafine particle size D90 is less than or equal to 15 microns. Meanwhile, a three-stage gradient cold trap (-80 DEG C,-120 DEG C and-196 DEG C) is adopted to recover volatile components, and a surface modifier is immediately added after crushing to inhibit powder agglomeration. The process solves the problems of degradation of thermosensitive components, dissipation of volatile components, overlarge particle size and the like in traditional crushing, so that the retention rate of the thermosensitive components is greater than or equal to 95%, the volatile loss rate is less than or equal to 3%, and the dissolution rate is increased by 2.8 times or more. The obtained powder can be directly applied to acupoint application, powder inhalation and transdermal preparations, and the requirements of a novel drug delivery system are met.

The invention relates to the field of cold trap adsorption, provides a cold trap device and a vacuum system, is applied to a vacuum chamber, and comprises a mounting seat, a refrigeration part and a condensation part. The mounting base comprises a cold trap cavity, the mounting base is provided with a connector used for communicating the vacuum cavity with the cold trap cavity, the refrigeration part is arranged on the mounting base, the refrigeration part is provided with a heat conduction part, and the heat conduction part is located in the cold trap cavity; the condensation part is arranged on the mounting seat and is positioned in the cold trap cavity; wherein the refrigeration part and the condensation part are arranged independently, the condensation part comprises a heat conduction shaft connected with the heat conduction part, and a plurality of heat conduction pieces are arranged on the peripheral wall of the heat conduction shaft. Due to the fact that the condensation part and the refrigeration part are independently arranged, the design allows the condensation part to concentrate on increasing the surface area so as to improve the condensation adsorption area and the heat absorption effect, and the overall performance of the system is improved. No cooling liquid exists in the condensation part, so that the problem of internal pressure does not need to be considered.

The invention discloses a double-cold-trap operation monitoring method, a double-cold-trap control system, a medium and a product, and relates to electric digital data processing.The method comprises the steps that first cold trap temperature and humidity data, first condensate water cumulant, second cold trap temperature and humidity data and second condensate water cumulant are obtained; determining a first cold trap dehumidification efficiency, a second cold trap dehumidification efficiency, a first temperature gradient, a second temperature gradient and a condensate water cumulant change rate; determining a first operation defect of the first cold trap and / or a second operation defect of the second cold trap according to a preset parameter standard value; and based on the first operation defect of the first cold trap and / or the second operation defect of the second cold trap, searching a double-cold-trap processing scheme of which the relevancy is higher than a preset relevancy threshold in a preset operation defect processing scheme database. By implementing the method, the accuracy of double-cold-trap operation monitoring can be improved.

The invention discloses a detection method for an ODS detection system, which comprises the following steps: S1, sample introduction trapping: a first cold trap is at a first temperature, and the first cold trap traps all ODS in a sample gas; s2, first desorption: the second cold trap is at a second temperature, the first cold trap is heated to a third temperature, ODS with the boiling point smaller than or equal to the boiling point of CO2 in the first cold trap is desorbed out, CO2 adsorption is conducted through a CO2 adsorption pipe, and the ODS desorbed out of the first cold trap after adsorption through the CO2 adsorption pipe is focused through the second cold trap; s3, secondary analysis: heating the first cold trap to a fourth temperature, analyzing the remaining ODS in the first cold trap, and focusing the remaining ODS in the first cold trap by the second cold trap; and S4, injection: heating the second cold trap to a fifth temperature, analyzing all ODS in the second cold trap, and injecting the ODS into the GCMS detection device. The method has the advantages of high test precision and high test accuracy.

The present disclosure relates to a measuring method and device for trace and ultra-trace oil content. The measuring device of the present disclosure includes a cryogenic enriching device, an extracting device and an infrared spectrometer; The cryogenic enriching device includes a Dewar container and a U-shaped pipe; The extracting device includes an extractant container, an input pipe, an outlet pipe and an extraction liquid quantitative pipe; A mass flowmeter is further disposed on the U-shaped pipe, the oil content in the gas is calculated according to the measured total mass of the gas and the oil concentration of the extraction liquid measured by the infrared spectrometer. The present disclosure further provides a measuring method, which converts the measurement of oil content in gas into the measurement of oil concentration in liquid extractant through effective extraction by liquid nitrogen cold trap enrichment mode, and adopts infrared spectrophotometry to accurately measure.

The invention discloses a method for determining carbon isotopes of low-concentration soluble organic carbon in a water body, and belongs to the technical field of organic carbon detection. The determination method comprises the following steps: combining a TOC analyzer and a stable isotope mass spectrometer, and converting DOC in a water body into CO2 gas by adopting the TOC analyzer; cO2 gas generated by the TOC analyzer is enriched for the first time through the cold trap T1; the CO2 gas frozen by the cold trap T1 is enriched for the second time through a cold trap T2; introducing the CO2 subjected to secondary enrichment into a stable isotope mass spectrometer, and determining the carbon isotope composition of the CO2. Aiming at a low-concentration DOC water body, the carbon isotope composition of DOC in the water body is determined on the basis of combination of a wet oxidation technology and stable isotope mass spectrometry detection, a wet oxidation method is used for increasing the volume of a water sample to generate more CO2 for stable isotope mass spectrometry determination, so that more accurate carbon isotope composition is obtained, and the method is efficient, time-saving, labor-saving and accurate.

The utility model relates to a cold trap device capable of generating high pressure in situ, which comprises a cold trap barrel body, an air inlet pipe, an air inlet pipe vacuum valve, an air outlet pipe, an air outlet pipe vacuum valve and a pressure gauge, and is characterized in that the cold trap barrel body is arranged in a liquid nitrogen Dewar; the device can utilize a low-temperature environment created by the liquid nitrogen Dewar to form a low-temperature space capable of effectively compressing or liquefying gas in the cold trap barrel body, so that the gas entering the cold trap barrel body is compressed or converted into a liquid state, and the internal temperature of the gas gradually rises along with the slow removal of the cold trap barrel body from the liquid nitrogen environment; the previously compressed or liquefied gas begins to expand, creating a higher pressure. External impurities are not introduced, extra energy input is not needed, energy consumption is reduced, the environmental protection performance is improved, and the operation efficiency of the whole system can be remarkably improved.

The freeze-drying system comprises a freeze-drying tank and a cold trap, an annular heat conduction clamping sleeve and a material sleeve are arranged in the freeze-drying tank, a plurality of heat conduction partition plates are arranged between the annular heat conduction clamping sleeve and the material sleeve, and the heat conduction partition plates are arranged in the circumferential direction of the annular heat conduction clamping sleeve at intervals; a material drying cavity is formed between every two adjacent heat conduction partition plates, the cold trap communicates with the material drying cavities, and a material guiding and homogenizing assembly is arranged between the material drying cavities and a feeding port of the freeze-drying tank and used for uniformly distributing materials into the material drying cavities. And a material blocking assembly is arranged between the material drying cavity and the material outlet of the freeze-drying tank. The drying device has the advantages that material accumulation can be avoided, and the drying effect is improved.