808 results about "Nitrogen generator" patented technology

The embodiment of the utility model provides a nitrogen making machine, which relates to the technical field of nitrogen making equipment, and comprises a PSA (Pressure Swing Adsorption) nitrogen making machine, the PSA nitrogen making machine comprises a pipeline system and two adsorption towers with consistent specifications, sealing plates are fixed at the top ends in the adsorption towers, and rotating holes are formed in the tops of the sealing plates and the tops of the adsorption towers. When the adsorption tower of the nitrogen making machine performs adsorption work, the servo motor drives the output shaft of the reduction gear box to rotate, so that the screw rod obtains relatively large twisting force, and the screw rod enables a molecular sieve to enter the middle cylinder and then be discharged from the middle cylinder in a screw transmission manner, so that the molecular sieve circularly flows in the adsorption tower, and the adsorption efficiency is improved. The molecular sieves are arranged in the adsorption tower, so that airflow entering the adsorption tower can be in uniform contact with the molecular sieves, the phenomenon of local saturation is avoided, and the turbulent flow effect can be started through the flowing molecular sieves, so that the retention time of the airflow in the adsorption tower is prolonged, and the adsorption efficiency is improved.

The invention belongs to the technical field of waste gas filtering equipment, and particularly relates to a nitrogen making machine waste gas filtering treatment device and method. Comprising a butt joint pipe installed on a waste gas outlet of the nitrogen making machine, and a first internal thread opening is formed in one end of the butt joint pipe and is in threaded connection with one end of an adjusting pipe; the other end of the adjusting pipe is in threaded connection with a first air outlet pipe; the outer surface of the adjusting pipe communicates with a second air outlet pipe, and the inner surface of the adjusting pipe is slidably connected with a filter screen cylinder. According to the invention, whether the pre-filter of the nitrogen making machine fails or not can be quickly found so as to automatically carry out emergency filtering treatment, and meanwhile, ash removal operation can be automatically carried out to realize long-term operation of equipment; according to the invention, a worker can conveniently find out an abnormity and can rapidly carry out emergency filtering treatment at the same time; according to the invention, a worker can conveniently find the abnormity of the pre-filter of the nitrogen making machine, and meanwhile, the emergency ash removal and filtering effects can be ensured, so that the long-term operation of equipment is realized.

The molecular sieve pressing structure of the nitrogen making machine comprises a tower body, a gas inlet end and a gas outlet end are arranged on the side wall of the bottom and the side wall of the top end of the tower body respectively, a feeding port and a discharging port are formed in the side wall of the top end and the side wall of the bottom end of the tower body respectively, and a bottom plate is fixedly connected to the inner wall of the bottom end of the tower body; a plurality of air holes are formed in the surface of the bottom plate, a plurality of mounting seats are fixedly connected to the inner wall of the tower body, a plurality of threaded holes are formed in each mounting seat, a bolt matched with each threaded hole is in threaded connection with the interior of each threaded hole, a top cover is mounted at the top of the tower body, and the top cover is fixedly connected with the top of the tower body. The top and the bottom of the top cover are fixedly connected with a mounting frame and a sealing block respectively, an air outlet end is arranged on the top cover, and a pressing mechanism is mounted on the mounting frame. The molecular sieves can be filled into the whole adsorption tower in a layered mode, all layers of molecular sieves can be fully pressed, and mechanical stress generated when a pressing mechanism is pressed can be effectively relieved.

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 invention discloses an oil-immersed transformer with an explosion-proof protection structure, the oil-immersed transformer comprises an explosion-proof box body and an oil-immersed transformer installed in the explosion-proof box body, the top of the explosion-proof box body is fixedly provided with a small nitrogen generator, and the inner top wall of the explosion-proof box body is fixedly provided with a gas pipe; a pipeline on the small nitrogen generator is communicated with the interior of the gas pipe, the gas pipe is connected with a branch pipe communicated with the interior of the gas pipe, the branch pipe is fixedly provided with a first electric control valve, the gas pipe is provided with a second electric control valve, and the second electric control valve is located at the bottom of the branch pipe. In the aspect of flame retardance, the flame-retardant assembly is unique in design, and the movable plate, the expansion air bag, the storage box and other components are matched ingeniously. When fire extinguishing dry powder exists in the storage box and the inner wall is inclined, overheated or abnormally burnt, the push rod pulls the movable plate, nitrogen in the expansion air bag enters the storage box, the dry powder is blown out to form dry powder cloud, flames are effectively restrained, the explosion possibility is reduced, and reliable flame-retardant protection is provided for the oil-immersed transformer.

The invention relates to an efficient and energy-saving system for continuously removing VOC (Volatile Organic Compounds) from a polypropylene material. The system comprises a, a feeding device; the ridge tower sequentially comprises a preheating section, a devolatilization section, a pre-cooling section and a cooling section from top to bottom, a middle rotary valve is arranged between the pre-cooling section and the cooling section, and the preheating section, the devolatilization section and the pre-cooling section are used for conducting preheating, devolatilization and pre-cooling treatment on the PP particles under the action of heated nitrogen; a feeding rotary valve is arranged at the top of the ridge tower, and a discharging rotary valve is arranged at the bottom of the ridge tower; the nitrogen generating device and the heater are respectively used for generating and heating nitrogen so as to provide hot nitrogen required by devolatilization treatment; a heating section fan is arranged between the nitrogen generating device and the heater; d, a cooling section fan is used for further cooling the pre-cooled PP particles; and e, a middle rotary valve and a discharging rotary valve. The VOC in the polypropylene granules is reduced to be less than 50ppm through nitrogen operation, and the odor grade is less than 4.0. Finally, the VOC content in the polypropylene is reduced, meanwhile, the odor grade is reduced, and the quality of the polypropylene resin is improved.

The utility model belongs to the technical field of nitrogen generators, and particularly relates to a nitrogen generator which comprises a generator body, supporting frames are installed at through openings formed in the two sides of the generator body, a transverse plate is fixed in the supporting frame on the right side, a micro pump is fixed to the top of the transverse plate, and a coil pipe is fixedly communicated with the water inlet end of the micro pump. And the water outlet end of the micro pump is communicated with a connecting pipe. According to the nitrogen generator, by arranging the supporting frame, the transverse plate, the micro pump, the coil pipe, the connecting pipe, the water tank, the semiconductor chilling plate, the vertical plate, the fan and the filter screen assembly, when the nitrogen generator is used, the fan is arranged on one side of the generator body, so that the flowing speed of air in the nitrogen generator can be increased; and when external air enters the generator body from the other side, the temperature of the air can be reduced through the heat exchange coil pipe, so that the heat dissipation effect on the interior of the generator body is further enhanced, and the situation that an air pump in the generator body is damaged due to the too high temperature is avoided.

The invention provides a device and a method for producing ammonium nitrate by taking air and water as raw materials. Compared with the prior art, the device is composed of the nitrogen generator, the plasma discharge device, the fixed bed reactor and the absorption tower, sliding arc discharge is adopted, the fixed bed reactor is heated through heat generated by discharge, NH3 and NOx are synthesized through nitrogen and water discharge, and the ammonium nitrate solution is finally obtained through oxidation absorption. According to the method, only air and water are used as raw materials, high-temperature and high-pressure reaction conditions in the industrial ammonium nitrate synthesis process are avoided, the synthesis process driven only by renewable energy sources is realized, and the method can be applied to the scenes of distributed energy storage, small-scale production of agricultural nitrogen fertilizers and the like.

The nitrogen making machine with the storage function comprises a base, an air compressor, a dryer, an air filter and a pair of adsorption towers are installed on the base, a supporting table is arranged on one side of one adsorption tower, a plurality of through holes are formed in the surface of the supporting table, a limiting opening is formed in the center of the supporting table, and an air storage tank is placed in the limiting opening; a sensor is installed on the top of the air storage tank, a plurality of positioning blocks are fixedly connected to the side wall of the air storage tank, a hanging ring is fixedly connected to the top of each positioning block, an air conveying opening and an air outlet are formed in the air storage tank, a locking piece is installed on the air conveying opening, and a cooling mechanism is installed on the base. According to the device, prepared nitrogen can be stored through the gas storage tank, the gas storage tank can be cooled through the cooling mechanism, quick disassembly and assembly of the gas storage tank can be completed without manually screwing or unscrewing a fastener with the help of a tool, a pipeline connected to the gas storage tank can be locked and fixed, and the gas storage tank is convenient to disassemble and assemble. Therefore, nitrogen escape caused by loosening and falling off of the pipeline is avoided.

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 utility model discloses a micro-nano high-activity powder feeding, grinding and discharging integrated device, which relates to the technical field of processing equipment and comprises a nitrogen making machine, a grinding bin, an anti-explosion vacuum pump, a remote automatic control cabinet, a glove box, a vacuum packaging machine and an anti-explosion air compressor. According to the improved feeding, grinding and discharging integrated device, matched nitrogen making equipment is adopted for supplementing nitrogen to a grinding bin on line in real time, the oxygen content is monitored on line through an oxygen content tester capable of setting an alarm value in a system, and once the oxygen content exceeds the set alarm value, a chain protection function is triggered; the vibration grinding device can be stopped for protection until nitrogen is continuously introduced into the nitrogen making equipment to enable the oxygen content value in the grinding bin to be below an alarm value, and the vibration grinding device can be started to run, so that the vibration grinding production device can effectively ensure that the running oxygen content in the system meets the safety operation requirement; the situation that the oxygen content exceeds the standard due to untight sealing of the system is avoided, and safe operation of the system under the low oxygen content is effectively guaranteed.

The invention relates to the technical field of terminals, in particular to a gas adjusting method and device for a fruit and vegetable storage space, a medium, a product and a chip. The method comprises the following steps: in a first time period, acquiring a first target concentration of oxygen, a first concentration of ethylene in a fruit and vegetable storage space and a first temperature of the fruit and vegetable storage space; fruits and vegetables of a first type are at least stored in the fruit and vegetable storage space; determining first predicted respiration intensity according to the first concentration, the first temperature, the first type and the first target concentration; acquiring first power consumption of the nitrogen making machine; determining a first balance value according to the first predicted respiration intensity, preset target respiration intensity and first power consumption; under the condition that the first balance value is smaller than the preset balance value, the oxygen concentration in the fruit and vegetable storage space is adjusted to be the first target concentration. Therefore, accelerated maturation of the fruits and vegetables caused by too high respiration intensity of the fruits and vegetables can be avoided, and high cost caused by too much nitrogen input of the nitrogen making machine can also be avoided.

The invention provides a coal mine fire early warning assistant defense joint control intelligent management and control platform, and relates to the technical field of coal mine safety detection. The platform is applied to a goaf equipped with a nitrogen making machine, and comprises a data acquisition layer, a data processing layer, a communication control layer, a monitoring and early warning layer and a data visualization layer, the platform collects the fluid flow in a closed pipeline in a goaf, the environment temperature of the goaf, the pressure of different working faces in a coal mine and the pressure of the position where each valve of the nitrogen making machine is located in real time, integrates all the collected data, compares and analyzes the integrated data with a set threshold value range, and if the analysis result is normal, the nitrogen making machine is started. If yes, the current operation state of the nitrogen making machine in the goaf is maintained; if the analysis result is abnormal, the nitrogen making machine is controlled to open a valve to inject nitrogen into the goaf for fire extinguishing until the analysis result becomes a normal position, and nitrogen injection is automatically stopped. The spontaneous combustion risk of the goaf can be effectively prevented and controlled, and the overall safety management level of a coal mine can be improved.

The invention discloses a lithium ion battery cabin oxygen concentration control system, and relates to the technical field of fire fighting. The oxygen concentration control system comprises an oxygen concentration sensor, a nitrogen making machine, a nitrogen station, an air compressor, a compressed air storage tank, a high-temperature-resistant and high-pressure-resistant seamless steel pipe, a one-way valve, a PLC (Programmable Logic Controller), a gas replacement indicator lamp, a lithium ion battery cabin and a battery cabin air inlet and exhaust flow control regulating valve. The controller is respectively connected with the oxygen concentration sensor, the nitrogen station, the compressed air storage tank, the lithium ion battery cabin air inlet and exhaust flow control regulating valve and the gas replacement indicator lamp. The nitrogen station is provided with a purging pressure measuring valve and a nitrogen cylinder head valve, and the high-temperature-resistant and high-pressure-resistant seamless steel pipe is connected with the nitrogen making machine, the nitrogen station, the lithium ion battery cabin, the air compressor and the compressed air storage tank. The lithium ion battery cabin is filled with high-purity nitrogen through the oxygen concentration control system, so that gas in the cabin is replaced, and controllable adjustment of an inerting environment in the cabin is realized. In addition, after the battery is subjected to thermal runaway, high-purity nitrogen is filled into the lithium ion battery cabin, thermal runaway flue gas in the cabin is quickly purged and replaced, and then an electric ball valve is linked to start air replacement, so that the air environment of the experiment cabin is kept.

According to the rapid sewage discharge method for the thin film type cargo containment system, grids are arranged below insulating plates in corner areas around the bottom of a cargo hold, and sewage discharge channels are arranged below the grids. When any cabin surface in the cabin leaks, flowing water flows to the bottom surface along the cabin wall and then can quickly permeate into the discharge channel through the grating. Sewage collected in the discharge channel enters the liquid collecting well through the blow-off pipe and then is sucked into the pipeline through the blow-off pump to be rapidly discharged, so that the problem of water accumulation at the bottom of the cargo hold is avoided, and meanwhile, the drainage rate in the cargo hold is increased. A secondary nitrogen main pipe connected with a nitrogen generator is connected into the discharge channel and is connected with an annular secondary nitrogen branch pipe in the discharge channel, the secondary nitrogen branch pipe is provided with a plurality of openings, after nitrogen is introduced into the pipe, residual sewage can be purged in the discharge channel in all aspects, and due to the fact that the pressure in the cabin is positive, the secondary nitrogen can be discharged out of the discharge channel. Therefore, the sewage in the discharge channel is accelerated to flow into the liquid collecting well. The problem of water accumulation at the bottom of the cargo hold is avoided, and meanwhile the water drainage rate in the hold is increased.

A disclosed dust filtering mechanism for a nitrogen making machine comprises a base, the top of the base is fixedly connected with a pair of supporting frames, a box body is fixedly connected between the supporting frames, the box body is internally provided with a plurality of filtering cavities, the top of the box body is provided with a top cover, and the top of the top cover is provided with a first filtering assembly; the bottom of the box body is fixedly connected with a plurality of diversion bins, the side walls of the diversion bins are fixedly connected with a plurality of diversion pipes, the bottom of the diversion bins is provided with a second filtering assembly, a recycling assembly is arranged below the box body, the front end face of the box body is provided with a plurality of air outlet holes, and the front end face of the box body is provided with a third filtering assembly. Air can be shunted, so that the filtering effect is improved, the burden of the filtering mechanism is relieved, the self-cleaning function is achieved, dust particles are prevented from being attached and accumulated on the inner wall of the dust filtering structure, multi-stage filtering can be achieved, and all the filtering assemblies are designed in a modularized mode and can be rapidly detached and taken out so that regular maintenance and replacement can be conveniently conducted.

The invention discloses a testing device and an analysis method for gas adsorption and desorption behaviors of a porous material. The testing device comprises an infrared spectrometer; a gas adsorption instrument; the temperature controller is connected with the infrared spectrometer; the nitrogen generator is connected with the infrared spectrometer; the cooling-water machine is connected with the infrared spectrometer; the liquid nitrogen tank is connected with the infrared spectrometer; the two ends of the connecting pipe are connected to the infrared spectrometer and the gas adsorption instrument respectively, and a second gas inlet valve is arranged on the connecting pipe and used for controlling on-off; and the connecting pipe is coated with a heating belt. The gas molecular state and the dynamic behavior can be detected and analyzed through the infrared spectrometer, the gas temperature can be controlled through the temperature controller, the cooling-water machine, the liquid nitrogen tank and the heating belt, nitrogen is output through the nitrogen generator to maintain the internal gas environment of the infrared spectrometer, and environmental interference is reduced. The invention relates to the technical field of porous material analysis equipment.

The utility model relates to the technical field of nitrogen making machine noise reduction, and discloses a nitrogen making machine noise reduction device which comprises a nitrogen making machine body, the input end of the nitrogen making machine body is communicated with an air inlet pipe, the output end of the nitrogen making machine body is communicated with an air outlet pipe, shells are arranged on the two sides of the upper end of the nitrogen making machine body, and lead screws are arranged at the lower ends of one sides of the shells. According to the technical scheme, the shell can be separated from the air inlet pipe and the air outlet pipe, so that the pipe valves of the air inlet pipe and the air outlet pipe can be conveniently maintained, after maintenance is completed, the shell can cover and isolate the pipe valves of the air inlet pipe and the air outlet pipe, noise discharge is reduced, meanwhile, the first noise reduction sponge is matched with the mesh plate, and noise is reduced. And in the shell moving process, the expansion air bag is expanded to push the second noise reduction sponge to be attached to the outer side wall of the air inlet pipe or the air outlet pipe, dissipation and discharge of the noise are further reduced, and therefore the noise reduction effect on the nitrogen making machine body is achieved.

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 nitrogen making machine with the dust filtering function comprises a nitrogen making machine body, a fixing cover and a motor, an air inlet is formed in the left side of the nitrogen making machine body, an air inlet pipe is fixedly inserted into the air inlet, and the upper end and the lower end of the air inlet pipe symmetrically abut against clamping rods; the outer wall of the clamping rod is connected with a threaded rod through a bearing, the surface of the threaded rod is sleeved with a connecting rod, the left side surface of the connecting rod is fixedly connected with a fixing block, and the fixing block is fixedly connected with the outer wall of the fixing cover. According to the nitrogen making machine, the fan blades are matched with the movable rod for use, air can be conveyed into the nitrogen making machine body in an accelerated manner, before the air enters the nitrogen making machine body, dust in the air can be filtered by the first filter plate, and the filtered air enters the nitrogen making machine body, so that the dust is filtered; and the effect of a dust filtering function is achieved.

The invention discloses an online nitrogen generation mobile phone APP remote monitoring system, and belongs to the technical field of information remote monitoring. The system comprises an air treatment module, an adsorption nitrogen generation module, a threshold warning module and a separation module. The output end of the air treatment module is connected with the input end of the adsorption nitrogen generation module; the output end of the adsorption nitrogen generation module is connected with the input ends of the threshold warning module and the separation module; the data information of each module is integrated on a display screen of the APP system and is displayed on an administrator port in a visual form, the administrator port further comprises an instruction module used for issuing instruction requirements for manufacturing nitrogen, and the instruction requirements comprise a nitrogen mass ratio and a nitrogen purity ratio. Based on the system, intelligent application of the same nitrogen making machine in different factories and digital adjustment under different nitrogen making precision requirements can be realized.

The invention provides a workpiece cutting machine tool for metal machining, and relates to the technical field of metal workpiece cutting. The workpiece cutting machine tool for metal machining comprises a cutting machine tool body, the upper surface of the cutting machine tool body is fixedly connected with a cutting operation box body, and the inner wall of the cutting operation box body is fixedly connected with a first fixing rod and a second fixing rod. According to the device, a nitrogen generator and a first fan are started, and nitrogen generated by the nitrogen generator enters a first connecting pipeline through the first fan, then enters a second connecting pipeline through a snakelike connecting pipe and then enters a third connecting pipeline through the second connecting pipeline; and finally, nitrogen enters the cutting operation box body through a second connecting pipeline and a third connecting pipeline, air in the cutting operation box body is exhausted through an exhaust connecting pipe, the gas in the cutting operation box body is nitrogen, and the situation that a large amount of oxygen exists in the cutting operation box body, and consequently chippings are oxidized is avoided.

A polishing and grinding device for finish machining of a valve body of a pneumatic valve of a nitrogen making machine relates to the technical field of grinding and polishing devices and comprises a polishing and grinding workbench, the polishing and grinding workbench is a horizontally-arranged square table, and a lifting feeding and discharging assembly, an overturning clamping assembly and a two-face polishing and grinding assembly are arranged on the polishing and grinding workbench; a sliding installation opening extending transversely is formed in the middle of the upper surface of the polishing and grinding workbench, two transversely-symmetrical limiting clamping grooves are formed in each longitudinal outer end face of the polishing and grinding workbench, and an installation groove is formed between every two transversely-opposite limiting clamping grooves. According to the invention, the problems of single polishing and grinding mode, poor polishing and grinding adaptability to different parts, poor polishing and grinding adjustability, poor clamping adaptability, inconvenience in feeding and discharging transfer and the like existing in the fine machining and polishing and grinding process of the valve body of the pneumatic valve of the nitrogen making machine in the grinding and polishing equipment in the traditional technology are solved.

The utility model discloses a storage tank on-line real-time protection system which comprises a PLC control unit, a weather early warning system, a nitrogen making unit and a gas detection part, the output end of the weather early warning system and the output end of the gas detection part are electrically connected with the input end of the PLC control unit, the output end of the PLC control unit is electrically connected with the input end of the nitrogen making unit, and the output end of the PLC control unit is electrically connected with the input end of the nitrogen making unit. The output end of the nitrogen generation unit is electrically connected with the input end of the gas detection part; the gas detection part comprises a tank area, a plurality of storage tank pipe walls are arranged on the outer wall of one side of the tank area, a secondary sealing scraper is arranged on the outer wall of one side of each storage tank pipe wall, and a sensor connector is arranged on the outer wall of one side of each secondary sealing scraper.

The utility model provides an automatic monitoring device for atmospheric particulates. The automatic monitoring device comprises a particle separation unit, a cleaning unit and a monitoring unit, the particle separation unit comprises a separation barrel, a large particle collector, an air inlet pipeline, a cover body, a first air outlet pipeline, a first filter cavity, a second air outlet pipeline, a second filter cavity and a filter membrane, the large particle collector is arranged at the lower part of the separation barrel and is communicated with the separation barrel, the air inlet pipeline is arranged on one side of the separation barrel and is communicated with the separation barrel, and the filter membrane is arranged in the second filter cavity. A cover body is arranged on the upper portion of the separation cylinder, has an opening state and a closing state relative to the separation cylinder and is provided with a first air outlet pipeline. The nitrogen generator is used for releasing nitrogen, the nitrogen enters the large particulate matter collector through the channel and the port, and the path from the large particulate matter collector to the second gas outlet pipeline is communicated, so that the nitrogen washes the part, and the effect of cleaning the device is achieved.

The utility model discloses a molecular sieve pressing device for a nitrogen making machine, and particularly relates to the technical field of nitrogen making machines, the molecular sieve pressing device for the nitrogen making machine is arranged on an adsorption tower body, supporting legs are arranged on the periphery of the lower end of the adsorption tower body, and a bottle neck is arranged at the upper end of the adsorption tower body. A pressing mechanism is detachably connected to the upper end of the bottle neck, lifting lugs are fixedly connected to the periphery of the upper end of the adsorption tower body, and the upper ends of the supporting legs are fixedly connected with the lower end of the adsorption tower body. According to the molecular sieve pressing device for the nitrogen making machine, the pressing mechanism is arranged, so that a molecular sieve in the adsorption tower body can be always in a pressed state, strenuous movement caused by displacement of the molecular sieve is prevented, the yield and the purity of produced nitrogen are ensured, and the service life of the nitrogen making machine is prolonged. The pressure value in the tower can be detected and protected in real time, so that maintenance personnel are prompted to add and supplement molecular sieves in the tower in time.

The utility model discloses a noise reduction protection device for oxygen discharge of a nitrogen making machine, which relates to the technical field of noise reduction of nitrogen making machines and comprises a nitrogen making machine body, an air inlet end is mounted on the side edge of the nitrogen making machine body, the end head of the air inlet end is connected with an oxygen discharge pipe, the other end of the oxygen discharge pipe is connected with an exhaust end, and barrier plates are distributed in the oxygen discharge pipe at equal intervals. According to the oxygen exhaust device, the barrier plate and the first sound insulation cotton are arranged, in the oxygen exhaust process, the flow speed of gas can be effectively reduced through blocking of the barrier plate, the first sound insulation cotton wrapping the outer side of the oxygen exhaust pipe is matched, noise can be absorbed, and therefore noise can be effectively reduced; and after the device is used for a period of time, a worker can pull out the limiting bolt from the interior of the oxygen discharging pipe, so that regular replacement operation of the second sound insulation cotton and the first sound insulation cotton is conveniently realized, and the noise absorption effect can be guaranteed.

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 discloses a coal mine goaf low-temperature nitrogen fire preventing and extinguishing technology integrating intelligent monitoring and control, and belongs to the technical field of coal mine goaf fire preventing and extinguishing. The system comprises a ground nitrogen making machine, a ground monitoring center, an underground nitrogen cooling device, an intelligent monitoring module and a PLC intelligent control module. The nitrogen cooling device comprises a plate heat exchanger, a variable-frequency single-screw compressor, an air-cooled condenser, a liquid storage tank and an electromagnetic control valve which are connected in sequence; the intelligent monitoring module comprises a sensor unit and a communication transmission module; the PLC intelligent control module comprises a core controller, a man-machine interaction unit and a remote transmission unit; and the PLC intelligent control module automatically controls the start and stop of the system according to a preset three-level fire prevention and extinguishing threshold value, and dynamically adjusts the cooling temperature and the refrigerating capacity. According to the invention, 'monitoring-regulation-feedback 'closed-loop intelligent control is realized, an efficient and safe fire prevention and extinguishing technical support is provided for a special mining period of a mine easy to spontaneously ignite, and the system adapts to an underground complex environment.

The invention provides zirconium and hafnium separation equipment and method for a rectification pyrogenic process, and relates to the technical field of rectification pyrogenic processes. The equipment comprises a first plate tower, a second plate tower, a fused salt storage tank, a reboiler, a waste salt treatment system, a feeding device, a filler stripping tower, a nitrogen generator, a condenser and a cooling separator. The first plate tower and the second plate tower run in parallel and are connected through a material circulating pipeline, so that circulating separation of incompletely separated components is realized. The reboiler provides heat for the two towers, and the filler stripping tower performs stripping separation by using nitrogen. According to the method, the efficiency and purity of zirconium and hafnium separation are remarkably improved through double-tower synergistic separation, dynamic pressure regulation and magnetic field-assisted separation technologies, and meanwhile, energy consumption and environmental pollution are reduced through heat integration and waste salt treatment. The equipment is suitable for a plateau low-pressure environment, has a remote monitoring function, is convenient to operate and stable in operation, and meets strict requirements of nuclear-grade zirconium and hafnium-rich substances.