883results about "Nitrogen purification/separation" patented technology

The invention relates to a purification device system and method for oxygen, nitrogen and crude neon and helium, based on a non-low-temperature gas purification technology, hydrogen removal of crude neon and helium is coupled with regeneration of a nitrogen deoxidizing adsorbent, purification of nitrogen is coupled with a regeneration process of removing carbon dioxide and water from oxygen, and linkage purification and impurity removal of oxygen, nitrogen and crude neon and helium can be carried out. Therefore, efficient purification of nitrogen, oxygen and crude neon and helium is achieved.

The invention provides an inert gas generation system, and relates to the technical field of industrial gas production. The inert gas generation system comprises the following modules: a gas pretreatment module, an intelligent separation module, a dynamic purification module, a pressure regulation and control module, a quality analysis module, a safety control module and an energy efficiency optimization module, and the gas pretreatment module is used for removing particulate matters through an electrostatic dust collection device by adopting a multi-stage gradient filtering algorithm based on ambient air input, adjusting humidity by combining a dew point control technology, forming a standardized gas source and generating a standard gas source. Through combination of a multi-stage gradient filtering algorithm and a dew point control technology, collaborative treatment of particulate matters and humidity is realized, stable gas source input is formed, the reliability of a subsequent processing link is improved, membrane separation parameters are dynamically predicted by applying a convolutional neural network model, and the permeation efficiency of a hollow fiber membrane stack is optimized.

The invention relates to the technical field of molecular sieves, in particular to a molecular sieve and a preparation method and application thereof in nitrogen separation.The preparation method comprises the steps that a carbonized material and 3-chloropropyltrimethoxysilane are added into methylbenzene, heating is conducted under nitrogen protection till a reflux reaction is conducted for 12-48 h, after the reaction is finished, the room temperature is recovered, filtering is conducted, a product is collected, washing and drying are conducted, and a modified carbonized material is obtained; and adding the modified carbonized material and an ionic liquid into absolute ethyl alcohol, heating to reflux reaction for 12-48 hours, after the reaction is finished, recovering to room temperature, filtering, collecting a product, performing Soxhlet extraction with dichloromethane for 12-48 hours, drying to obtain an immobilized ionic liquid carbonized material, and performing CO2 activation and vapor deposition on the immobilized ionic liquid carbonized material to obtain the molecular sieve. The molecular sieve prepared by the invention has a relatively high specific surface area, and shows excellent performance of selectively adsorbing nitrogen in a methane and nitrogen mixed system.

The invention belongs to the technical field of nitrogen preparation, and particularly relates to a purified nitrogen preheating limit recovery system and method based on PSA separation nitrogen preparation. Comprising a nitrogen buffer tank, a gas inlet of the nitrogen buffer tank is communicated with a PSA separation nitrogen-making mechanism, a gas outlet of the nitrogen buffer tank is communicated with a dust filter, the dust filter is communicated with a reaction purification mechanism through a direct connection pipeline, the reaction purification mechanism is communicated with a drying mechanism, and the drying mechanism is communicated with the lower end of the nitrogen tank. The upper end of the nitrogen tank is communicated with the precision filter. According to the invention, nitrogen is preheated by heat generated after catalytic reaction in the reactor, energy consumption is saved, the outlet temperature of finished product nitrogen after efficient heat exchange basically reaches room temperature, cooling by cooling water is not needed, and the use amount of cooling water and the equipment cost are saved.

The utility model relates to a gas diffusion cascade device for preparing high-abundance nitrogen-15 isotopes by taking nitrogen as a medium. The gas diffusion cascade device comprises a first gas diffusion cascade, a second gas diffusion cascade, a photocatalysis / electro-catalysis device and a high-speed magnetic suspension gas compressor, the first gas diffusion cascade and the second gas diffusion cascade are ladder cascade and respectively comprise a plurality of gas diffusion separation devices; the photocatalysis / electrocatalysis device is positioned between the first gas diffusion cascade and the second gas diffusion cascade; the high-speed magnetic suspension gas compressor is positioned in front of each gas diffusion and separation device in the nitrogen flowing direction; and obtaining the high-abundance nitrogen-15 isotope prepared by taking nitrogen as a medium from the heavy fraction end of the second gas diffusion cascade. The gas diffusion cascade device is high in separation coefficient, large in flow and high in efficiency, the prepared nitrogen-15 isotope abundance is high, and the gas diffusion cascade device is suitable for industrial application.

The invention discloses a PSA oxygen production and nitrogen recovery cooperative control method and system, and relates to the technical field of gas separation. The method comprises the following steps: establishing a dynamic multi-target evaluation function comprising a plurality of performance indexes such as air compressor energy consumption, vacuum pump energy consumption, oxygen purity and nitrogen recovery rate, and collecting pressure, temperature, gas components and flow data in an adsorption tower in real time; in the adsorption stage, based on the real-time data and the current oxygen demand, a first machine learning model is used for generating and executing a dynamic pressure adjusting strategy for the air compressor; in a desorption stage, predicting an optimal vacuum degree curve based on historical desorption data by utilizing a second machine learning model, generating a start-stop and pumping rate control strategy of the vacuum pump according to the optimal vacuum degree curve, and determining the recovery rate of the vacuum pump according to a comparison result of the real-time nitrogen concentration and a preset recovery concentration threshold value. And desorption airflow is controlled to enter the nitrogen recovery pipeline or be directly discharged through the valve.

The invention belongs to the technical field of nitrogen making equipment, and discloses convenient-to-clean nitrogen making equipment which comprises a tank body, a fixing device arranged on the surface of the tank body, a gas inlet pipe fixedly arranged below one side of the tank body, a gas outlet pipe fixedly arranged above one side of the tank body, a partition plate fixedly arranged below the inner wall of the tank body, and a drain outlet formed below the partition plate. A molecular sieve is fixedly arranged above the inner wall of the tank body, a filtering device is movably arranged in the middle of the inner wall of the tank body, a transmission device is movably arranged below the molecular sieve, and a cleaning device is movably arranged above the transmission device; by arranging various structures in the tank body, effective cleaning of the interior of the equipment is achieved, the nitrogen making efficiency and the nitrogen quality are improved, the service life of the equipment is prolonged, the problems that in the prior art, multiple defects exist in the aspect of cleaning, and efficient, stable and sustainable production requirements cannot be met are solved, and the nitrogen making device is suitable for nitrogen making equipment.

The invention provides an improved ammonia production system based on a temperature swing adsorption principle. The improved ammonia production system comprises a water electrolysis hydrogen production module, a deep cooling air separation nitrogen production module, a multi-stage ammonia synthesis tower module and a double-bed circulating adsorption separation ammonia module, the water electrolysis hydrogen production module and the deep cooling air separation nitrogen production module provide raw material gas for the multi-stage ammonia synthesis tower module through a mixer, low-grade waste heat of a multi-stage ammonia synthesis tower serves as a heat source of the double-bed circulating adsorption separation ammonia module, and the double-bed adsorption separation ammonia module is connected with the multi-stage ammonia synthesis tower. The working conditions of an adsorption bed of the double-bed ammonia adsorption and separation module comprise an adsorption working condition and a desorption working condition, the adsorption bed alternately performs the adsorption working condition and the desorption working condition within the operation time, and low-grade waste heat from a multi-stage ammonia synthesis tower is used for driving to perform separation operation on ammonia synthesis gas so as to obtain high-purity ammonia; according to the invention, the operation pressure in an ammonia product separation project can be effectively reduced, circulation is formed, and the purity and the recovery rate of the obtained ammonia product are not reduced while the waste heat in the system is further utilized.

The invention relates to the technical field of gas purification, and discloses a methane-removing nitrogen automatic regeneration type purification method which comprises the following steps: pretreatment of raw material gas: controlling the pressure and flow of a raw material gas inlet, and introducing the raw material gas into a gas-gas heat exchange device for primary heat exchange; performing catalytic reaction to remove methane: injecting oxygen into the raw material gas, mixing, heating by a heating device, introducing into a catalytic barrel, reacting methane with oxygen by using a rare metal catalyst to generate water and carbon dioxide, and automatically adjusting the oxygen injection amount by detecting the content of methane and oxygen in the gas at the outlet of a catalytic system, maintaining the temperature in the catalytic barrel in a specified interval; and cooling treatment: sequentially passing the raw material gas from which methane is removed through a gas-gas heat exchange device and a water-cooling heat exchange device, and cooling the raw material gas to a specified temperature. The methane removal nitrogen automatic regeneration type purification method aims at solving the problems that a purification system is low in regeneration efficiency and insufficient in automation degree.

The invention discloses a mixed matrix membrane for efficient oxygen and nitrogen separation and a preparation method and application thereof. The mixed matrix membrane comprises a polymer continuous phase and an MOF filler uniformly dispersed in the polymer continuous phase, the MOF filler can separate nitrogen and oxygen, and the surface of the MOF filler is modified by the silane coupling agent, so that the MOF filler is well compatible with a polymer, and the oxygen-nitrogen separation effect is improved. The polymer solution and the MOF filler dispersion liquid are mixed, the mixed matrix membrane is prepared through the non-solvent induced phase separation method, and the method has the advantages of being simple in reaction condition, high in efficiency, easy to amplify and the like and has wide engineering prospects.

The utility model relates to a nitrogen making machine electromagnetic compatibility processing device, which comprises a device body, and the device body comprises a nitrogen making machine shell. The shielding box is provided with an accommodating chamber and comprises a shielding box body and a shielding box cover which are mutually occluded and sealed, and a conductive rubber strip is arranged between the contact surfaces of the shielding box body and the shielding box cover; the filtering assembly is arranged in the shielding box accommodating chamber and comprises a common mode inductor and a high-frequency decoupling capacitor; the common mode inductor is arranged in the shielding box, the interface assembly is exposed on the side wall of the shielding box, the interface assembly comprises an input interface and an output interface which are oppositely arranged, the input interface comprises an aviation socket, the output interface comprises a feed-through filter, the aviation socket is connected with the common mode inductor, and the common mode inductor is connected with the feed-through filter. According to the nitrogen making machine equipment, the anti-interference performance can be improved, and meanwhile, the external interference capability of the nitrogen making machine serving as a disturbance source is also reduced.

The invention belongs to the technical field of gas separation, and particularly relates to a zero-gas-consumption PSA (Pressure Swing Adsorption) air separation nitrogen-making device which comprises an adsorption tower, a top cover, a gas outlet pipe, a gas inlet pipe and an electromagnetic valve, the protection mechanism is arranged at the joint of the adsorption tower and the top cover; the back flushing mechanism is arranged at the upper end of the adsorption tower; the blocking mechanism comprises a blocking part arranged in the air outlet pipe, an abutting part is arranged on the blocking part, an adjusting part is arranged on the abutting part, and the pressure generated by the abutting part on the blocking part is adjusted by twisting the adjusting part; wherein the protection mechanism comprises an outer shell, the outer shell is composed of two shell bodies, reinforcing parts are annularly distributed in the outer shell, and warning parts and linkage parts are arranged on the reinforcing parts. According to the invention, a high-efficiency zero-gas-consumption air separation nitrogen production process can be realized; and meanwhile, good safety protection measures are taken, and the situation of gas leakage is reduced.

The invention relates to the technical field of crushing equipment, and discloses a lucid ganoderma crusher which comprises a base which serves as a basic component of the whole device and is used for assembling and bearing all treatment mechanisms and subordinate structural components of the treatment mechanisms. The treatment barrel is arranged in the middle of the top end of the base and is used for collecting and treating the lucid ganoderma. By adding and arranging the pretreatment mechanism, the mechanism pretreats the lucid ganoderma before crushing treatment by adopting high-temperature steam, on one hand, the high temperature of the steam can enable biological macromolecules such as microorganisms and nucleic acid on the surface and in the lucid ganoderma to be denatured, so that the biological macromolecules lose activity, the sterilization and disinfection effects are achieved, and the product quality and safety are improved; and on the other hand, the moisture and heat effect of the steam can soften and expand pectin, cellulose and other substances in cell walls and intercellular substances of the ganoderma lucidum, so that the texture of the ganoderma lucidum becomes softer, and the unnecessary material loss in the crushing process is reduced.

The invention relates to a nitrogen making method and device for a refrigerator cabin, a refrigerator and a computer readable storage medium, and the method comprises the steps that a nitrogen making module of the refrigerator comprises an air pump and a molecular sieve tower, the air pump is connected with the molecular sieve tower, and the air pump is used for inputting air into the molecular sieve tower; the molecular sieve tower is used for separating nitrogen in air and inputting the nitrogen into a target cabin of the refrigerator. The method comprises the steps that the target nitrogen concentration is obtained according to the fruit and vegetable fresh-keeping requirement in the target cabin; adjusting the working pressure of the air pump according to the target nitrogen concentration; wherein the higher the target nitrogen concentration is, the higher the working pressure of the air pump is; the lower the target nitrogen concentration is, the smaller the working pressure of the air pump is. By adopting the method, the problem that the nitrogen and oxygen concentration in the refrigerator cabin cannot be adjusted to the ideal concentration can be solved.

The invention relates to a stable and continuous photovoltaic green ammonia synthesis system which comprises a photovoltaic power generation device, a water electrolysis hydrogen production device, a green ammonia synthesis device, an electrochemical energy storage device, a green hydrogen storage tank and a nitrogen production air separation device, the photovoltaic power generation device is simultaneously connected with the power supply ends of the water electrolysis hydrogen production device, the green ammonia synthesis device and the nitrogen production air separation device and the input end of the electrochemical energy storage device through power transmission lines; the electrochemical energy storage device is simultaneously connected with the power supply ends of the green ammonia synthesis device and the nitrogen-making air separation device through power transmission lines; the output end of the water electrolysis hydrogen production device is respectively connected with the input ends of the green hydrogen storage tank and the green ammonia synthesis device through material conveying pipelines; and the input end of the green ammonia synthesis device is also respectively connected with the output ends of the green hydrogen storage tank and the nitrogen-making air separation device through material conveying pipelines. According to the invention, stable and continuous operation of the green ammonia production system under different weather conditions can be ensured, no electricity needs to be purchased, and energy conservation and environmental protection are truly realized.

The utility model discloses a nitrogen purification device, which belongs to the technical field of nitrogen purification and comprises a reaction tank and a nitrogen purification mechanism positioned in an inner cavity of the reaction tank, a gas inlet pipe is fixedly connected to the top wall of the reaction tank, a gas outlet pipe is fixedly connected to the bottom wall of the reaction tank, and a servo motor is horizontally mounted on one side wall of the reaction tank. Fixing rods are embedded in the two sides of an inner cavity of the reaction tank respectively, inner cavities of the two fixing rods are located on the opposite sides of the two fixing rods, a screw rod and a limiting rod are arranged in the two fixing rods respectively, an output shaft of the servo motor is coaxially connected with the screw rod, the two ends of the limiting rod are welded to the fixing rods, and the limiting rod is connected with the servo motor. A storage plate is horizontally arranged in the center of the inner cavity of the reaction tank, sliding plates are symmetrically welded to the two sides of the storage plate, and lug plates are welded to the sides, facing the servo motor, of the two sliding plates. According to the nitrogen purification device, the heating area of the surface of the metal bar is increased, so that the reaction between the metal bar and oxygen is quicker, and the nitrogen purification efficiency is improved.

The utility model relates to an environment-friendly nitrogen-making device for alcohol ketone tail gas. The environment-friendly nitrogen-making device comprises a tail gas compression unit, a catalytic oxidation purification unit, a freeze dehydration unit, a pressure swing adsorption unit, a nitrogen storage and conveying unit and a nitrogen purification unit, the technology is characterized in that all units are connected in sequence, and specifically, a tail gas compression unit comprises a tail gas buffer tank, a filter, a compressor, a cooler and a liquid separator; the catalytic oxidation purification unit comprises a heat exchanger, a heater, a reactor, a catalyst and a water cooler; the freezing dehydration unit comprises a refrigerating unit, a refrigerator and a water segregator; the pressure swing adsorption unit comprises an adsorber, an adsorbent, a vacuum pump and a desorption gas buffer tank; the nitrogen storage and conveying unit comprises a nitrogen buffer tank and a nitrogen pipe network. According to the technology, the alcohol ketone tail gas can be purified and recycled to be used for producing nitrogen, environment-friendly emission reaches the standard, meanwhile, high-purity nitrogen is recycled, and environmental pollution and resource waste are reduced.

The utility model discloses pressure swing adsorption nitrogen making equipment, which relates to the technical field of nitrogen making machines and comprises two groups of adsorption towers, fixed seats are fixedly arranged at the inner bottom ends of the two groups of adsorption towers, air inlets are arranged at the bottom ends of the outer side walls of the adsorption towers in a penetrating manner, one ends of the air inlets extend into the fixed seats, and the other ends of the air inlets extend into the fixed seats. A gas outlet penetrates through the top end of the outer side wall of the adsorption tower. The two adsorption towers are arranged, the fixed net covers are arranged in the adsorption towers, the air inlets and the air outlets are formed in the two ends of the adsorption towers, the air inlet pipes and the air outlet pipes are arranged at the air inlets and the air outlets respectively, the first electromagnetic valves are arranged on the air inlet pipes and the air outlet pipes, and the two adsorption towers are connected and disconnected by controlling the first electromagnetic valves corresponding to the two adsorption towers. The switching of the working state of a single adsorption tower can be realized, so that the operation of another adsorption tower is not influenced while the carbon molecular sieve in the fixed net cover is replaced, and the continuity of nitrogen preparation is ensured.

The utility model provides small nitrogen making equipment which comprises a shell with an opening in the side face and a door plate arranged at the opening of the shell, a control system is arranged on the door plate, and the control system is used for controlling starting, stopping and running of the nitrogen making equipment. A modular nitrogen generator is arranged in the shell, the modular nitrogen generator comprises a first adsorption group, a second adsorption group, a buffer tank and a gas path control valve group, and nitrogen generation is realized through connection and control of the gas path control valve group and a pipeline. The equipment has the characteristics of small volume, energy conservation, high efficiency, high purity, simplicity in maintenance, safety, reliability and the like.

The invention provides a system for preparing urea by reducing carbon emission through renewable energy sources. The core of the system is that an electrolytic cell is used to decompose water to produce hydrogen and oxygen, where hydrogen is delivered to the first reaction furnace and oxygen is directed to the gasification furnace. In the first reaction furnace, nitrogen and hydrogen are combined to produce ammonia. And meanwhile, in the gasification furnace, raw material coal is converted into synthesis gas and is conveyed to the combustion furnace through a pipeline. Energy generated by the combustion furnace is used for driving the turbine so as to drive the generator to generate electricity. In addition, supercritical carbon dioxide serves as an energy storage medium, waste heat generated after the supercritical carbon dioxide expands to do work in the turbine is utilized, energy recovery is conducted through the heat regenerator and the condenser, and finally the supercritical carbon dioxide returns to the system to be recycled. By the adoption of the structure, unstable green energy sources such as wind energy and solar energy are ingeniously integrated, and it is ensured that the energy sources can be effectively utilized even if the energy sources cannot be directly connected into a power grid.

The nitrogen making device comprises a box body, a nitrogen making assembly, a mounting support, a fresh-keeping drawer and a nitrogen making assembly, the nitrogen making assembly and the mounting support are mounted on the box body, the nitrogen making assembly comprises an air pump and a molecular sieve, and the air pump communicates with the molecular sieve and is used for providing compressed air for the molecular sieve; the mounting bracket is used for connecting a refrigeration liner of the refrigerator; the fresh-keeping drawer is slidably connected to the mounting support, a fresh-keeping chamber can be defined between the fresh-keeping drawer and the box body, and the fresh-keeping chamber communicates with the nitrogen outlet of the molecular sieve. In this way, modular design of the nitrogen making device in the refrigerator can be achieved, the structure of the nitrogen making device can be simplified, the production efficiency of the nitrogen making device and the assembling efficiency of the nitrogen making device in the refrigerator are improved, and the effect of reducing cost is achieved; in addition, leakage points during operation of the nitrogen making device can be reduced, vibration transmission to the refrigeration inner container is weakened, and the safety and reliability of the nitrogen making device and the refrigeration inner container of the refrigerator after long-term use are improved.

The invention discloses a nitrogen generation system of nitrogen generation equipment. The nitrogen generation system comprises a fan, a dust falling mechanism, a gas guide pipe and a purification mechanism, the dust falling mechanism comprises a dust falling box, a water spraying part, a bearing part and a driving assembly; the fan is arranged on the dust falling box and communicates with the dust falling box, the water spraying component is arranged in the dust falling box, the bearing component is arranged in the dust falling box in a liftable mode, the driving assembly is arranged on the dust falling box, and the bearing component can descend after receiving water and starts the driving assembly; the purification mechanism comprises a purification box, a purification part and a cleaning part; the purifying box is communicated with the dust falling box through an air guide pipe, the purifying component is arranged in the purifying box, the cleaning component is slidably arranged in the purifying box in a penetrating mode, sliding of the cleaning component can scrub the purifying component, and the driving mechanism can drive the cleaning component to move in a reciprocating mode. According to the purification system of the nitrogen making equipment and the nitrogen making equipment, the problem that the purification part is not cleaned for a long time due to forgetting and the like can be avoided.

The present invention belongs to the technical field of industrial flue gas carbon capture, and particularly relates to a system and method for realizing carbon and nitrogen co-production by using the dry coke quenching off-gas. The system includes a dry coke quenching circulating gas system, a desulfurization reactor, a fine desulfurizer, a first induced draft fan, a heat exchanger, a catalytic reactor, a waste heat boiler, a second induced draft fan, a spray cooling tower, a decarbonization absorption tower, a regeneration tower and a condensation tower. The system and method of the present invention make full use of the characteristics of high CO concentration and low oxygen content in the dry coke quenching off-gas, and utilize the dry coke quenching off-gas from the perspectives of calorific value utilization and low-oxygen purified gas, which not only solves the problems of energy waste and environmental pollution caused by the discharge of high-calorific value components in the off-gas, but also makes full use of the characteristics of the off-gas to produce purified gas with low oxygen content, crude nitrogen, high-concentration CO2, and rich in low-pressure steam, having high economic value.

The invention provides an electricity-hydrogen-ammonia / alcohol collaborative management and control system, and relates to the field of energy management and intelligent control. Comprising an energy management module, a production management module and a hydrogen-ammonia / alcohol optimization control module, wherein the energy management module is used for sending a power generation prediction curve corresponding to a new energy station to the production management module and regulating and controlling power generation equipment of the new energy station; the production management module generates a production scheduling plan of each working section corresponding to the hydrogen-ammonia / alcohol optimization control module, and issues the production scheduling plan to the hydrogen-ammonia / alcohol optimization control module; the hydrogen-ammonia / alcohol optimization control module comprises a full-section optimization simulation unit and single-section optimization control units respectively corresponding to each section; the hydrogen-ammonia / alcohol optimization control module generates an optimal control strategy of each workshop section based on the production scheduling plan, generates a control instruction of each workshop section and issues the control instruction to the DCS; and the DCS adjusts and controls each workshop section based on the control instruction and sends a feedback signal of each workshop section to the hydrogen-ammonia / alcohol optimization control module.

According to the carbon cycle ammonia production system and method based on chemical-looping water splitting, in the carbon cycle ammonia production system based on chemical-looping water splitting, a chemical-looping carbon cycle nitrogen-hydrogen cogeneration module combines a fuel reactor and a high-temperature solid carbon dioxide electrolytic cell in a chemical-looping process, and hydrogen-nitrogen cogeneration with zero carbon emission is achieved. According to the Harbin process ammonia preparation module, multi-stage compression and intermediate cooling are carried out on raw material gas, the system energy consumption is reduced, and moisture used for a steam reactor is preheated. Then, a multi-stage reactor is adopted in the ammonia production process, heat recovery and raw material recovery are implemented, and a chemical chain product is efficiently converted into ammonia gas. The concentrating solar thermoelectric steam co-production module adopts molten salt as a working medium and is combined with a reheat return Rankine cycle containing a heat regenerator to meet the heat and electricity requirements of the system. The system utilizes a chemical-looping water splitting technology to prepare high-purity ammonia gas under a zero-carbon condition, and has the advantages of high efficiency, low emission, high resource utilization and the like.

The invention belongs to the field of intelligent adsorption nitrogen making machines, and particularly relates to an intelligent self-adaptive pressure swing adsorption nitrogen making machine which is characterized in that two alternate nitrogen making pressure swing adsorption tank bodies are arranged between an air filtering system and a nitrogen storage tank in a communicating mode, and each pressure swing adsorption tank body is provided with a plurality of sieve plates capable of sliding to be close to each other; molecular sieve particles are filled in the pressure swing adsorption tank body among the plurality of sieve plates, a plurality of conical sleeves are arranged on the upper end surface of each sieve plate, a spiral transmission plate is rotatably arranged in each conical sleeve, and an annular inclined sieve plate is arranged on the excircle surface of the upper end of each conical sleeve; annular plates are arranged between the conical sleeves and the annular inclined sieve plates, and a plurality of feeding ports are formed in the outer circle face of the lower end of each conical sleeve. By arranging the conical sleeve and other components, the molecular sieve in the pressure swing adsorption tank can be stirred up and down, so that the desorption efficiency of the molecular sieve is improved, and meanwhile, dust generated by crushing in the molecular sieve can be separated.

The utility model discloses a nitrogen purification device, and relates to the technical field of gas purification. A sealing cover is mounted at the top of the purification tank, a plurality of part replacing openings are annularly formed in the sealing cover, the part replacing openings are rotationally connected with inner pipes, a top cover is mounted at the top ends of the inner pipes, outer pipes matched with the inner pipes are fixedly connected in the purification tank, adsorbents are mounted in the inner pipes, and positioning assemblies are arranged on one sides of the part replacing openings; a plurality of inner reaction openings are evenly formed in the inner pipe along the circumferential side face, a plurality of outer reaction openings matched with the inner reaction openings are formed in the outer pipe along the circumferential side face, the outer side wall of the inner pipe is attached to the inner side wall of the outer pipe, and a rotary table is arranged between the bottom face of the inner pipe and the bottom of the outer pipe. By regulating the rotation included angle between the inner pipe and the outer pipe for installing the adsorbent in the purification tank, regulation of the size of the internal reaction window outside the purification tank is realized, and nitrogen leakage during adsorbent replacement is effectively reduced while opening of the purification tank is avoided.

A process for stabilizing an electrical network, by combining energy storage and generation steps, and for producing ammonia is provided.

The invention relates to the technical field of gas separation membrane materials, in particular to a preparation method of a PIL-MOF composite membrane and application of the PIL-MOF composite membrane in CO2 / N2 separation.The preparation method comprises the steps that S1, a PET base membrane is pretreated, specifically, the PET membrane is soaked in a 3M HNO3 solution for 8-12 hours, washed with deionized water to be neutral and then dried; s2, in-situ growth of UiO-66-NH2: dissolving zirconium tetrachloride in acetic acid, preserving heat at 80 DEG C for 0.5-1.5 hours, cooling, adding DMF and 2-aminoterephthalic acid to form a precursor solution, dipping the pretreated PET film for 1-3 hours, and performing solvothermal reaction at 110-130 DEG C for 18-24 hours to obtain a PET / UiO-66-NH2 film; and S3, photo-initiation polymerization: coating the surface of the PET / UiO-66-NH2 film with a solution containing [VBIM] [BF4], a cross-linking agent and a photoinitiator, carrying out 365 nm ultraviolet light curing for 0.5-2 h, and drying to obtain the PIL-MOF composite film. The composite membrane combines the porous characteristic of the metal organic framework and the functional characteristic of the ionic liquid, and has application value in the fields of gas separation, catalysis and the like; the preparation process is simple, the interface bonding strength is high, and the product performance is stable.

The utility model relates to the technical field of nitrogen making equipment, in particular to flow-controllable pressure swing adsorption nitrogen making equipment, which comprises an adsorption cylinder and a storage cylinder, a shell is fixedly communicated and connected between the adsorption cylinder and the storage cylinder, two extension plates are symmetrically distributed on the surface of the shell in the axial direction of the shell, and the two extension plates are arranged on the surface of the shell. Extension openings are symmetrically distributed in the surface of the shell in the direction perpendicular to the axis of the shell, the surface of each extension opening is fixedly connected with an interface flange, a movable wheel is movably arranged in the shell, a rotating shaft is fixedly connected to the center of the movable wheel, and a plurality of first sliding grooves are formed in the surface of the movable wheel in the circumferential direction. A movable plate is slidably connected into each first sliding groove, each movable plate is attached to the inner surface of the shell, the space between the movable wheel and the shell has a containing difference by changing the height of the circle center of the rotating shaft, the movable wheel is made to rotate, and therefore the gas volume at the inlet and outlet position is adjusted, and the flow is adjusted in a disguised mode.