431results about "Nitrogen purification/separation" patented technology

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 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 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 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 utility model discloses a system for efficiently preparing liquid nitrogen by using a two-stage membrane separation technology, and relates to the technical field of industrial purification and liquefied nitrogen. The membrane separation technology and the gas liquefaction technology are combined, so that nitrogen in air is purified, the residual pressure of medium-pressure gas is fully utilized to provide cold energy for high-concentration nitrogen liquefaction, and the residual potential energy of the high-concentration gas is utilized to improve the nitrogen generation efficiency. A compressor, a gas cooling module, a first-stage separator and a second-stage separator of the system are sequentially arranged in the flowing direction of air. A high-pressure outlet of the second-stage separator is communicated with a first hot end inlet of the first heat exchanger; a first outlet of the first heat exchanger is communicated with a hot end inlet of the second heat exchanger, a second hot end inlet is communicated with a side backpressure outlet of the first-stage separator, a second outlet is communicated with a cold end inlet of the second heat exchanger through an expansion machine, a third outlet is communicated with atmosphere, and the cold end inlet is communicated with a second outlet of the second heat exchanger; and a side backpressure outlet of the second-stage separator is communicated with the compressor.

The invention relates to the technical field of cryogenic nitrogen making machine control, in particular to a cryogenic nitrogen making machine cluster control method, system and device and a storage medium. The control method comprises the following steps: collecting air compressor outlet air real-time parameters of each cryogenic nitrogen making machine in a cluster, current state parameters of molecular sieve adsorbers and precooler operation parameters, and predicting regeneration requirements of each molecular sieve adsorber in a future preset time period. According to the method, the operation parameters of each unit in the cluster are collected, and the future regeneration demand is predicted based on the time sequence model, so that a time window is provided for dynamic adjustment of waste heat utilization; on the basis, the dynamic heat contribution value is calculated based on the outlet parameters of the air compressor, the opening degree of the branch valve is adjusted in advance according to the dynamic heat contribution value, time matching and quantity matching of waste heat supply and regeneration requirements are achieved, and heat supply and demand imbalance caused by adjustment delay is avoided.

The invention relates to the technical field of plasma electric flame stoves, in particular to a system for supplying nitrogen through centralized air separation for an electric flame stove and a working method. The system comprises an air compression and pretreatment unit, a pressure swing adsorption separation unit, a nitrogen buffer pressure stabilization unit, a nitrogen distribution conveying pipe network, a user side regulation and control unit and at least one electric flame stove which are sequentially connected in the gas flow direction. According to the invention, through centralized nitrogen generation and pipeline distribution, the problem of large-flow nitrogen supply of dispersed users is solved, and the emission of nitrogen oxides is greatly reduced due to the use of oxygen-free nitrogen by the electric flame stove. According to the system, indoor oxygen supplementation of oxygen-enriched gas and domestic hot water recovery of compressed waste heat are achieved at the same time, and the comprehensive utilization efficiency of resources is improved; by adopting the carbon steel pipe net, the construction cost is reduced, and nitrogen with different purities can be flexibly produced to meet multiple requirements; and real-time matching of nitrogen supply and stove power is realized through intelligent flow control of a user side, and stable and efficient operation is guaranteed.

The embodiment of the utility model discloses a marine nitrogen generation system which comprises an air compression assembly, a nitrogen generation assembly, a nitrogen generation assembly and a nitrogen generation assembly, wherein the air compression assembly is used for receiving clean air and compressing the clean air; the air inlet end of the air pretreatment assembly is connected with the air outlet end of the air compression assembly, and the air pretreatment assembly is used for pretreating compressed air; the gas inlet end of the membrane separation main machine is connected with the gas outlet end of the air pretreatment assembly, and the membrane separation main machine is used for preparing nitrogen from the pretreated air to obtain nitrogen; the gas inlet end of the nitrogen pressurizing assembly is connected with the gas outlet end of the membrane separation main machine, and the nitrogen pressurizing assembly is used for pressurizing nitrogen; the gas supply module is used for supplying gas to the equipment to be supplied with gas; and the upper control machine is used for controlling each component and carrying out gas consumption regulation. And the intelligence of the nitrogen generation system is improved.

The utility model relates to a molecular sieve regeneration device for liquid nitrogen wash purified gas of a synthetic ammonia production device. In the device, a low-pressure nitrogen pipeline is connected with a molecular sieve adsorber, the bottom of the molecular sieve adsorber is connected with a nitrogen heater through a pipeline, and the nitrogen heater is connected to a phosphoric acid device hot blast stove through a fuel gas pipeline. The top of the molecular sieve adsorber is connected with the liquid nitrogen washing cold box. A track ball valve I is arranged on a connecting pipeline between the bottom of the molecular sieve adsorber and the nitrogen heater; and a regulating valve II is arranged on the nitrogen heater and the fuel gas pipeline. According to the utility model, high-concentration CO adsorbed by the molecular sieve is sent to the hot blast stove of the phosphoric acid device for combustion at the initial stage of the regeneration preheating stage of the liquid nitrogen wash molecular sieve, thereby improving the automatic control level of molecular sieve regeneration programs; the problem of fluctuation of a low first washing device during regeneration of the molecular sieve is effectively solved, the problem that a combustible poisonous gas detector gives an alarm due to direct emptying of high CO during regeneration is thoroughly solved, and part of energy is recycled.

The utility model discloses a preparation system of oxygen-deficient nitrogen, which comprises a buffer tank as an oxygen-deficient nitrogen tank; a gas inlet of the buffer tank is connected with a gas mixer, a high-purity nitrogen inlet pipe and a compressed air inlet pipe are respectively connected with a gas inlet of the gas mixer, and the two gases enter the oxygen-poor nitrogen tank after being mixed in the gas mixer. According to the oxygen-deficient nitrogen preparation system provided by the utility model, high-purity nitrogen and compressed air provided by a chemical industry park can be used as raw material gases, and the high-purity nitrogen and the compressed air respectively enter the gas mixer in proportion to be mixed and then enter the oxygen-deficient nitrogen tank, so that the oxygen-deficient nitrogen with required concentration is continuously provided for production.

In order to overcome the defects in the prior art, the invention provides a preparation method of a coprecipitation copper-manganese catalyst and a preparation method of ultrapure nitrogen, the preparation method of the coprecipitation copper-manganese catalyst comprises the following steps: mixing a copper metal salt solution, a manganese metal salt solution and an oxidizing agent, and adjusting the pH value to 7.5-11, the molar ratio of copper to manganese being (0.02-3): 1; carrying out ultrasonic aging on the coprecipitate for 20-40 minutes, and then aging for 10-14 hours; filtering and washing to obtain a filter cake; and drying the filter cake overnight at 95-125 DEG C, and calcining at 350-450 DEG C in a gas atmosphere for 3-5 hours to obtain the coprecipitation copper-manganese catalyst. The catalyst prepared by the preparation method of the coprecipitation copper-manganese catalyst provided by the invention has relatively good catalytic capability, can simultaneously catalyze and remove carbon monoxide and hydrogen at room temperature, maintains 100% H2 conversion rate for 4-8 hours, maintains high CO conversion rate for more than 50 hours, has very long effective action time, and is very suitable for industrial production. The long-period operation requirement of industrial production can be met.

The application provides a two-dimensional RUB-18 zeolite membrane and a preparation method and application thereof in gas separation, and belongs to the technical field of two-dimensional nanosheet membrane preparation and gas separation, and the preparation method of the two-dimensional RUB-18 zeolite membrane comprises the following steps: ball-milling stripping to obtain a two-dimensional RUB-18 zeolite nanosheet solution; and placing a porous substrate into the two-dimensional RUB-18 zeolite nanosheet solution to perform electrophoretic deposition. The application provides a mild method for preparing two-dimensional RUB-18 zeolite nanosheets by ball-milling stripping, and the two-dimensional RUB-18 zeolite membrane is prepared from the two-dimensional RUB-18 zeolite nanosheets, which is simple, efficient, low in cost, and a two-dimensional RUB-18 zeolite membrane with a thickness of 200-800 nm can be grown on the porous substrate in 5-50 minutes, and the two-dimensional RUB-18 zeolite membrane can be successfully used for gas separation, and the permeability and selectivity can be considered.

This invention provides a nitrogen generator, comprising a gas pump, an annular buffer chamber, a first pipeline, and a second pipeline. The gas pump's outlet pipe is connected to both the first and second pipelines, which are in turn connected to the annular buffer chamber. The gas pump draws in air through the inlet pipe and discharges it into the first and second pipelines in the form of airflow. The first pipeline discharges airflow with a pressure greater than a preset airflow pressure into the annular buffer chamber. The second pipeline discharges airflow with a pressure less than a preset airflow pressure into the annular buffer chamber. The annular buffer chamber uniformly mixes the airflow with the pressure greater than the preset airflow pressure with the airflow with the pressure less than the preset airflow pressure. This invention reduces airflow pressure fluctuations, pipeline vibration, and airflow noise by uniformly mixing airflows with different pressures flowing through the first and second pipelines within the annular buffer chamber.

The application provides a hydraulic pressure compacting adsorption tower structure with a detection feedback function, and mainly relates to the technical field of pressure swing adsorption equipment. The hydraulic pressure compacting adsorption tower structure with the detection feedback function comprises an adsorption tower cylinder, an upper cover and a hydraulic pressure compacting module. The upper cover is detachably fixed at the top end of the adsorption tower cylinder through a bolt assembly. The adsorption tower cylinder is filled with granular molecular sieve. A sieve plate, a stainless steel wire mesh pad and a pressing plate are sequentially stacked in the axial direction above the molecular sieve. The detection end of an electric contact pressure gauge is in communication with the piston cavity of the hydraulic pressure compacting module, and the signal output end thereof can be externally connected to a PLC control system to realize pressure alarm and compacting state feedback. The structure is widely applied. The hydraulic pressure compacting module has the advantages of manual compacting, low cost, high reliability, large compacting force, good stability, adjustable design of the compacting rod length, oil leakage prevention, double anti-reverse prevention and the like. Moreover, the compacting state can be monitored and fed back in real time, and the invalidation of the molecular sieve can be effectively avoided.

The invention relates to a pressure swing adsorption type nitrogen generator and a preparation method, and relates to the technical field of nitrogen preparation, the pressure swing adsorption type nitrogen generator comprises a nitrogen preparation device, the nitrogen preparation device comprises a first adsorption tower and a second adsorption tower which are designed to alternately prepare nitrogen, and gas outlets of the first adsorption tower and the second adsorption tower communicate with each other through a connecting pipeline; the middle part of one side of the connecting pipeline is communicated with a gas outlet pipeline communicated with the nitrogen storage tank, so that two lagging sections are formed between the gas outlet pipeline and the two gas outlets and are used for intercepting nitrogen containing residual oxygen, and the gas outlets of the first adsorption tower and the second adsorption tower are provided with oxygen detection pieces; a reverse pressurizing pipeline communicated with the reverse pressurizing pipeline is arranged between the carbon molecular sieve filling block and the gas outlet pipeline on the other side of the lagging section, and through the reverse pressurizing pipeline, the preparation purity of nitrogen can be improved, the pressure difference can be increased, the desorption rate of the adsorption tower can be increased, and the purity of nitrogen prepared in the next process can be improved.

The invention provides an electromagnetic induction heating type molecular sieve air separation device which comprises a box body, a rotating pipe, a driving mechanism and a control unit, an air compressor is arranged on the top face of a rack and connected with an air inlet pipe and a connecting pipe, the connecting pipe extends downwards, the end of the connecting pipe is connected with a rotating connector, and a permanent magnet is arranged in the box body to form a magnetic field; the driving mechanism is in driving connection with the rotating pipe, the rotating pipe is sleeved with a rotating cylinder, the rotating cylinder is internally provided with a molecular sieve, the molecular sieve is sleeved with the rotating pipe, the side face of the molecular sieve is sleeved with a conductor winding, the bottom of the rotating cylinder is rotationally connected with a circular ring, and the circular ring is connected to the pressure sensor through a first spiral spring. The pressure sensor is arranged to monitor the increased weight of the molecular sieve in real time, when a weight threshold value is reached, the driving mechanism is triggered, the rotating pipe is driven to rotate to drive the conductor winding to rotate, heat energy generated by electromagnetic induction is utilized to heat the molecular sieve, and molecular sieve regeneration is automatically completed.

The utility model discloses an automatic hydrogenation nitrogen purification device, which relates to the field of purification devices, and comprises a rack, the top of the rack is fixedly connected with two dryers, a filter, a heater, two coolers, a deaerator and an electric cabinet, the two dryers are fixedly connected to the top of the rack, the two coolers are fixedly connected to the top of the rack, and the filter is fixedly connected to the top of the rack. And the two coolers are fixedly connected to the top of the rack. According to the automatic hydrogenation nitrogen purification device disclosed by the utility model, ordinary nitrogen enters the deaerator filled with the palladium catalyst deoxidation adsorbent, and a large amount of water generated under the action of the palladium catalyst deoxidation adsorbent after oxygen and hydrogen in the ordinary nitrogen are mixed is discharged, so that the residual oxygen content in the nitrogen can be less than ppm, and in view of saving energy consumption, the nitrogen purification efficiency is greatly improved. The adopted palladium catalyst deoxidizing adsorbent can achieve the deoxidizing effect without electric heating, the device does not need operators, all waste gas and waste water are discharged in a centralized mode, and sanitation and cleanliness of a plant are facilitated.

The invention discloses a new energy off-grid green, hydrogen and ammonia production integrated system coupled with liquid-air energy storage and power generation, and relates to the technical field of new energy comprehensive utilization and chemical production. A wind-light-electricity new energy power generation module converts wind energy and solar energy into electric energy, and a liquid air energy storage module stores energy through air compression-liquefaction-expansion; the hydrogen production module utilizes electric energy to electrolyze water to produce hydrogen, the air separation module produces nitrogen and supplies the nitrogen to the ammonia production module, and the ammonia production module reacts hydrogen and nitrogen to synthesize green ammonia. The problems of intermittency and instability of new energy power generation are effectively solved, integrated production of green hydrogen and green ammonia under the off-grid condition is achieved, dependence on traditional energy and external infrastructures is reduced, the production cost and carbon emission are reduced, and the energy utilization efficiency is improved; meanwhile, the circulating system of the ammonia production module improves the utilization rate of raw materials and improves the economic benefits of the system.

The utility model discloses an electronic-grade nitrogen purification device, which relates to the technical field of nitrogen purification and comprises a placing plate, a filter tank arranged at the top of the placing plate, a gas inlet formed in the circumferential surface of the filter tank, a breather pipe fixedly connected to the top of the filter tank, and a molecular sieve drying box fixedly connected to one end of the breather pipe. The bottom of the molecular sieve drying box is fixedly connected to the top of the placing plate, the side face of the molecular sieve drying box is fixedly connected with an air outlet pipe, the other end of the air outlet pipe is fixedly connected with a storage tank, the bottom of the storage tank is fixedly connected to the top of the placing plate, and a stirring and filtering device is arranged in the filtering tank. According to the utility model, the rotating force of the shell clamp is matched with the rotating shaft, the activated carbon strip and other components, so that the effect of driving the activated carbon strip to rotate when the driving strip rotates is realized, and the effective filtration of organic gas and odor of nitrogen in the filtering tank is realized.

The utility model belongs to the technical field of nitrogen-making devices, and discloses a nitrogen-making device based on membrane separation, which comprises a supporting piece, an air compressor, a combined filter and a separation tank are arranged above the supporting piece, the supporting piece comprises a base plate, one side of the base plate is sequentially recessed to form three slots, side grooves are formed in two sides, close to the three slots, in the base plate, and the side grooves are communicated with the air compressor. The air compressor, the combined filter and the separation tank are fixedly connected to the tops of the three connecting pieces correspondingly, each connecting piece comprises an inserting plate, clamping plates are fixedly connected to the two symmetrical sides of each inserting plate, and the inserting plates and the clamping plates are inserted into the inserting grooves and the side grooves correspondingly. When the air compressor, the combined filter and the separation tank need to be replaced, only the insertion plates need to be pulled, when one of the devices is damaged, only the corresponding device needs to be replaced, overall disassembly and replacement are not needed, and the maintenance difficulty of the devices is reduced.

Processes and apparatuses for treating NOx from a carbon dioxide stream. Prior to separating carbon dioxide and NOx, NOx is converted to nitrogen gas in an NOx conversion zone, which may include an SCR reactor and / or CO boiler. A carbon separation zone which may include one or more fractionation columns produces a CO2 stream and an NOx stream. The NOx is passed back to the NOx conversion zone.

The invention relates to the technical field of nitrogen making machines, in particular to a nitrogen making machine convenient to maintain and use in a low-temperature environment and a using method of the nitrogen making machine. The heating assembly comprises a heat source, a partition plate, a connecting pipe, a waste heat recovery pipe and an exhaust pipe, hot air generated by the heat source can be preferentially blown to the double-tower nitrogen-making equipment, then the hot air enters the maintaining cavity through the hot air flow channel to conduct auxiliary heating on other equipment in the nitrogen-making assembly, and finally the hot air cooled in the maintaining cavity enters the waste heat recovery pipe through the connecting pipe to conduct auxiliary heating on the other equipment in the nitrogen-making assembly. The interior of the waste heat recovery pipe is hollow, the waste heat recovery pipe preheats air in the air inlet pipe in a convective heat exchange mode, and low-temperature air obtained after heat exchange is completed is exhausted out of the box body through the exhaust pipe.

The application provides a purifier and a gas preparation device. The purifier comprises a plurality of stacked fixed purification units. The purification unit comprises: a filter plate assembly for filtering hydrogen-rich gas to form hydrogen gas and waste gas; a hydrogen flow channel plate which is pressed on one side of the filter plate assembly and is used for receiving and guiding the hydrogen gas; and a waste gas plate assembly which is pressed on the other side of the filter plate assembly and is used for receiving the hydrogen-rich gas and guiding the obtained waste gas. The filter plate assembly, the hydrogen flow channel plate and the waste gas plate assembly have the same shape and are each provided with a plurality of positionally corresponding annular parts at the outer edge and in the direction perpendicular to the purification unit. The positionally corresponding annular parts form gas channels which pass through the purification unit. Different gas channels are used for forming a hydrogen-rich gas passage, a hydrogen passage and a waste gas passage. The hydrogen flow channel plate is communicated with the hydrogen passage to guide the hydrogen gas into the hydrogen passage. The waste gas plate assembly is communicated with the hydrogen-rich gas passage and the waste gas passage to receive the hydrogen-rich gas and guide the waste gas into the waste gas passage.

The invention discloses a device and a process for refining and purifying nitrogen, and relates to the technical field of nitrogen purification, and the process comprises the following steps: step 1, desulfurization pretreatment: feeding a raw material common nitrogen from a nitrogen inlet, and removing sulfides such as H2S and SO2 through a desulfurization tower; step 2, TSA deep decarburization: the desulfurized nitrogen enters a decarburization tower A or a decarburization tower B which is working, and CO2, CO and hydrocarbon are deeply removed; and 3, purity monitoring and output: detecting the purified nitrogen through an analyzer to generate qualified high-purity nitrogen, outputting the qualified high-purity nitrogen, and automatically emptying the qualified high-purity nitrogen if the qualified high-purity nitrogen is not qualified. By inheriting a double-tower composite process of normal-temperature desulfurization and temperature swing adsorption and introducing online monitoring and automatic control, deep, continuous and stable removal of various impurities such as carbon monoxide, carbon dioxide and sulfide in nitrogen is realized, and the problems that an existing purification device is single in function, cannot deeply remove various harmful impurities and is low in purification efficiency are solved. And a continuous operation and real-time quality assurance mechanism is lacked.

The utility model relates to the technical field of nitrogen filters, in particular to a filter for nitrogen purification, which comprises a tank body, a tank cover for blocking is assembled on the surface of the top end of the tank body through bolts, and electromagnetic valves for controlling opening and closing are assembled at the gas inlet end of the top of the tank cover and the gas outlet end of the periphery of the tank body; when the filter element body in one vertical hole needs to be replaced, the stop valve between the vertical hole and the flow dividing pipe can operate and block the channel at the position, then the vertical hole is in a closed state due to the check valve at the communicating position of the vertical hole and the tank body, and then the filter element body can be replaced only by rotating the surface of the tank cover to block the disc cover of the vertical hole at the position. The disc cover is more convenient to disassemble through the ring seat at the top of the disc cover, then the barrel seat screwed in the vertical hole can be disassembled, the filter element body in the barrel seat can be replaced, reverse operation is convenient to install, meanwhile, the filter element body at the position can be continuously used only by removing blocking of the stop valve, and nitrogen can be conveniently filtered.

The utility model provides a portable modularized nitrogen making machine. The portable modularized nitrogen making machine comprises a gas inlet seat and a gas outlet seat, wherein the gas inlet seat and the gas outlet seat are respectively provided with a gas inlet channel and a gas outlet channel; the air inlet end and the air outlet end of the adsorption module are respectively communicated with the air outlet end of the air inlet channel and the air inlet end of the air outlet channel; the first connecting piece is detachably arranged at the air inlet end of the air inlet channel in a sealing manner; the second connecting piece is detachably arranged at the air outlet end of the air outlet channel in a sealed mode. Pipeline connection among a compressed air pipeline, an air inlet channel and an air inlet control valve is achieved through a first input channel, a first output channel and a first control cavity which are integrally integrated in a first connecting piece. And the second input channel, the second output channel and the second control cavity which are integrally integrated in the second connecting piece realize pipeline connection among the nitrogen pipeline, the gas outlet channel and the gas outlet control valve, so that the number of pipe fittings required by the nitrogen making machine is greatly reduced, rapid installation of the gas pipeline of the nitrogen making machine is realized, the production efficiency is improved, and the production cost is reduced. And connection points of gas pipelines can be reduced, and the gas leakage risk is reduced.

The flow-adjustable nitrogen generator comprises a collecting tank and a shell connected with the nitrogen generator, a shell cover is installed at the upper end of the shell, a stopping block for automatically closing the collecting tank to collect nitrogen is arranged in the shell, a gas inlet is formed in the outer ring face of the stopping block, and a gas outlet is formed in the outer ring face of the stopping block. An air outlet hole is formed in the bottom surface of the shell opposite to the air inlet, a connecting pipe is mounted on the bottom surface of the shell opposite to the air outlet hole, an air injection pipe on the collecting tank is mounted in the connecting pipe, a plurality of air catching grooves are formed in the outer ring surface of the stop block, the two sides of the shell protrude to form thickened parts, and arc-shaped grooves communicated with the shell are formed in the thickened parts; and a clamping plate for clamping and positioning the stop block is arranged in the arc-shaped groove. The device is simple in structure, nitrogen can be automatically blocked and intercepted through the blocking block, the danger caused when the nitrogen continuously enters the inner wall of the collecting tank is avoided, and the nitrogen does not need to be checked all the time.

The utility model relates to a nitrogen recycling device in a krypton-xenon refining system. Comprising a krypton and xenon feed gas pipeline, the krypton and xenon feed gas pipeline is connected with a light component removal rectification part through a water removal unit, a tower kettle liquid outlet pipeline of the light component removal rectification part is connected with a krypton and xenon separation tower, the light component removal rectification part comprises a light component removal rectification tower, and a gas phase outlet of the light component removal rectification tower is connected with a condenser tube pass. A tube pass outlet of the condenser is respectively connected with a reflux inlet of the light component removal rectifying tower and a liquid oxygen storage tank; the moisture removal unit comprises a first channel of a first heat exchanger, and the first channel of the first heat exchanger is connected with a light component removal rectifying tower through an adsorber and a first channel of a second heat exchanger; the liquid nitrogen storage tank is connected with the regenerated gas buffer tank for the adsorber through a shell pass of the condenser and a second channel of the second heat exchanger; an outlet of the regenerated gas buffer tank for the adsorber is connected with the adsorber; the device is simple in structure and reasonable in design, and can realize long-time stable operation of a krypton and xenon refining system while realizing effective utilization of nitrogen cooling capacity and self.

The invention provides a control method and device of a nitrogen making machine and the nitrogen making machine, and relates to the technical field of nitrogen making machines, and the control method of the nitrogen making machine comprises the steps that air is introduced into an air compressor to generate first compressed air; moisture, oil and particles in the first compressed air are removed, and purified air is generated and guided into an air storage tank; the adsorption separation equipment is controlled to adjust the valve opening degree according to the air pressure of purified air, and first nitrogen is separated out; controlling the adsorption separation equipment to close a valve, and analyzing the nitrogen element content of the first nitrogen; guiding the first nitrogen to separate out qualified nitrogen or unqualified nitrogen, guiding the qualified nitrogen into a nitrogen storage tank, and guiding the unqualified nitrogen back to the adsorption tower for adsorption again; the qualified nitrogen is stored and subjected to pressure regulation, and second nitrogen is obtained; and controlling the second nitrogen to be cleaned and filtered through the dust filter, and releasing the second nitrogen. According to the invention, rapid starting can be realized, purity stability is improved, gas waste is reduced, and system energy consumption is reduced.

The invention discloses a preparation method and application of a Ni-NH2-MOF-coated HPP-COF composite material for adsorbing and separating perfluorocarbon gas / nitrogen, and belongs to the field of gas separation. The method comprises the following steps: 1, preparing HPP-COF powder; 2, preparing Ni-NH2-MOF (Metal Organic Framework) powder; and 3, compounding. According to the invention, Ni-NH2-MOF and HPP-COF are introduced into the field of gas adsorption, and a method for combining COF and MOF materials is creatively provided by utilizing the interaction of specific recognition of a perfluorinated compound and an amino group and a polymerization reinforcing structure on the surface of HPP-COF; a PFCs / N2 mixed gas separator meeting actual production requirements is prepared, the high adsorption capacity of MOF and the high stability of COF are combined, the problems that a traditional static porous material is poor in selectivity, stability and acid resistance are solved, specific adsorption of MOF to PFCs is enhanced, and selectivity is improved.