CN211688266U (Baymer Experimental Equipment)
Drawer type nitrogen gas generator
In the figure: 1 nitrogen generator casing, 2 nitrogen generator sliding guides, 3 drawer type internal mounting frames, 4 gas storage tanks, 5 nitrogen generator devices, 6 heating furnaces, 7 locks and 8 operation panels.
CN109160496A (Solving Vibration and Noise Problems)
Fig. 1, schematic diagram of the main view structure
Fig. 2, schematic diagram of left-view structure
Fig. 3, a schematic diagram of the enlarged structure at A
In the figure: 1. a main body, 2. an air intake, 3. a base, 4. a roller, 5. a threaded hole, 6. a first bolt, 7. a push plate, 8. a rubber pad, 9. a shelf, 10. a backing plate, 11. a sound-absorbing cover, 12. a second bolt, 13. a heat dissipation hole, 14. an exhaust fan, 15. a telescopic shaft, 16. a spring.
How it works:
When using the small nitrogen gas generating device that is convenient for installation, the main body 1 is first moved to a suitable position through the roller 4, when the base 3 needs to be fixed, the main body 1 is taken down from the base 3, the bolt or a certain fixing piece is put into the bolt hole 5, so that the base 3 is fixed, the main body 1 is placed on the base 3, the first bolt 6 is twisted, the push plate 7 is pushed to the main body 1 to be extruded, and when the main body 1 is placed on the base 3, it is fixed, and when the push plate 7 extrudes the main body 1, the rubber pad 8 also eases the force of the push plate 7 while squeezing the main body 1, so that the push plate 7 also plays a protective role while fixing the main body 1.
When the main body 1 starts to work through the air inlet 2, the vibration produced by the main body 1 will be absorbed by the telescopic shaft 15 and the spring 16, so that the vibration produced by the main body 1 will not cause harm to itself, and simultaneously when the noise generated by the main body 1 due to work is emitted outward, the sound will be absorbed by the sound-absorbing cover 11, so that the main body 1 will not affect the external environment and people when working, when the heat generated by the main body 1 after working for a period of time will be dissipated from the heat dissipation hole 13 to the outside and gathered in the sound-absorbing cover 11, the fan 14 will be turned on, so that the heat in the sound-absorbing cover 11 will be withdrawn, so that the heat dissipation of the main body 1 can be effectively improved, and the whole work is completed。
CN217173306U（现场制氮）
Background technology
Nitrogen is often used in the field of food preservation and testing technology, such as food safety testing and liquid chromatography-mass spectrometry equipment in the laboratory needs a large amount of nitrogen; most of the nitrogen in these fields is supplied by nitrogen cylinders or liquid nitrogen tanks, because the volume of nitrogen cylinders is limited, it needs to be replaced frequently, and the safety can not be guaranteed, and there will be a certain amount of waste, and the replacement of liquid nitrogen tanks needs manual control, which will consume a lot of manpower. Therefore, intelligent nitrogen generators are an effective way to solve the problem of on-site nitrogen supply. Different brands of LC/MS equipment require different gases, some only need, and some require nitrogen, dry air, and zero-class air at the same time. Therefore, different nitrogen generator specifications are required to meet the needs of different instruments.
And the air compressed by air compressor has larger water vapor and impurities, so the first-stage filtration requirement is higher, and there are two solutions in the prior art, one adopts a lower-cost filter assembly to reduce costs, and the defect of this kind is that it needs to be shut down and maintained frequently, and has a greater impact on production; the second kind adopts the filter of better quality to prolong the replacement cycle, but the cost of this kind of filter is higher, and the shutdown is still needed simultaneously.
Structural principle
The names of the parts referred to by each number in the figure are as follows: 1-air compressor, 2-refrigeration dryer, 3-air buffer tank, 4-nitrogen gas storage tank, 5-nitrogen film group, 6-controller, 7-first pressure transmitter, 8-second pressure transmitter, 9-purity analyzer, 11-dry air pipeline, 13-zero-level air pipeline, 14-first steam-water separator, 15-first filter, 16-second filter pipeline, 17-second steam-water separator, 18-second filter, 19-first pneumatic butterfly valve, 20-the second pneumatic butterfly valve, 21-the third filter, 22-the fourth filter.
The scheme itself comprises an air compression part, an air purification part, as follows: the air is compressed through the air compressor 1, and a part of the water is removed by the steam-water separator; the compressed air enters the refrigeration dryer through the steam-water separator and the primary filter to reduce the dew point temperature, and then enters the air buffer tank 3 for storage. The compressed air entering the air buffer tank 3 is relatively dry and clean compressed air.
In order to provide zero-level air and dry air, the bypassed compressed air pipeline is 2 roads, one compressed air pipeline is a dry air pipeline 11, a throttling valve and a pressure reducing valve are arranged on the dry air pipeline 11, and the other compressed air pipeline is a zero-level air pipeline 13. The air at the outlet of the air buffer tank 3 is separated into two strands of pipeline through the precision filter, one is the zero-grade air, the other is the dry air, and the two air channels are respectively adjusted by the throttle valve and the pressure valve is depressurized, and then sent to the pipeline to meet the air pressure requirement of the instrument.
The control system comprises a controller 6, the controller 6 is connected with the air compressor 1 and the refrigeration dryer 2, the air outlet end of the air buffer tank 3 is provided with a first pressure transmitter 7, the air outlet end of the nitrogen gas storage tank 4 is provided with a second pressure transmitter 8, and the first pressure transmitter 7 and the second pressure transmitter 8 are connected with the controller 6. The pressure of the air buffer tank 3 and the nitrogen buffer tank is obtained through the pressure transmitter, and the power of the compressor is controlled and even the start and stop are controlled sequentially.
The outlet end of nitrogen gas storage tank 4 is also provided with purity analyzer 9, and purity analyzer 9 is connected with controller 6. Membrane separation nitrogen production: Through membrane separation technology, the purified compressed air separates the main components in the air - oxygen and nitrogen through a special nitrogen production module, and the nitrogen concentration is 95-99.5%. Among them, the purity meter can detect the concentration of nitrogen, and when the nitrogen concentration is obviously abnormal, it indicates that the nitrogen membrane group 5 is faulty, and maintenance and replacement are carried out in time.
A first steam separator 14 and a first filter 15 are arranged between air compressor 1 and refrigerant dryer 2, a second filter pipeline 16 is also connected between air compressor 1 and refrigeration dryer 2, a first pneumatic butterfly valve 19 controlling the opening of the second filter pipeline 16 is arranged on the second filter pipeline 16, a second steam separator 17 and a second filter 18 are arranged in the second filter pipeline 16, a second pneumatic butterfly valve 20 is arranged at the air inlet end of the first steam separator 14, and the first pneumatic butterfly valve 19 and the second pneumatic butterfly valve 20 are in parallel state。 This scheme adopts two groups of filter assemblies to use, that is, adopts redundant design, described first pneumatic butterfly valve 19 and the second pneumatic butterfly valve 20 are all controlled by solenoid valve, solenoid valve is connected with controller 6, and the first pneumatic butterfly valve 19 and the second pneumatic butterfly valve 20 work only one at the same time.
A third filter 21 and a pressure reducing valve are arranged between the air buffer tank 3 and the nitrogen membrane group 5; a fourth filter 22, a throttle valve and a pressure reducing valve are arranged between the nitrogen gas storage tank 4 and the nitrogen outlet. The nitrogen prepared by the nitrogen membrane group 5 is sent to the nitrogen storage tank for storage, filtered by a precision filter, and the throttle valve adjusts the flow rate and the pressure valve reduces the pressure, and finally sends it to the pipeline to meet the nitrogen pressure requirement of the instrument.
Knowledge points
The nitrogen generator uses the different diffusion rates of oxygen and nitrogen molecules on the surface of the molecular sieve to separate nitrogen and oxygen, and the gas with smaller diameter (such as oxygen) has a faster diffusion rate, more carbon molecular pores that enter the molecular sieve, and gas molecules with larger diameter (such as nitrogen) have a slower diffusion rate and fewer micropores into the molecular sieve. This difference in selective adsorption of nitrogen and oxygen by molecular sieves is used to achieve nitrogen and oxygen separation.
5-molecular sieve mounting ring, 6-arc molecular sieve