CN217173306U

CN217173306U - Nitrogen generating device

Info

Publication number: CN217173306U
Application number: CN202123456943.XU
Authority: CN
Inventors: 裘超; 左建雄; 陈挺; 许丹; 张星; 刘济浔
Original assignee: Hangzhou Yiyang Health Technology Co ltd
Current assignee: Hangzhou Yiyang Health Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-08-12
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the field of nitrogen preparation, and discloses a nitrogen generating device, which comprises an air compressor (1), a cold dryer (2) and an air buffer tank (3) connected with the cold dryer (2) through a pipeline, wherein the air buffer tank (3) is also connected with a nitrogen storage tank (4) through a pipeline, a nitrogen membrane group (5) is arranged on the pipeline between the nitrogen storage tank (4) and the air buffer tank (3), and a compressed air pipeline is bypassed by the pipeline between the nitrogen membrane group (5) and the air buffer tank (3); and the nitrogen storage tank (4) and the nitrogen outlet end are provided with filter components. The nitrogen generating device has the characteristics that firstly, the device does not need to be stopped for maintenance, the production efficiency is higher, and the electrical control is convenient to realize.

Description

Nitrogen generating device

Technical Field

The utility model relates to an equipment field is prepared to nitrogen gas, especially relates to a nitrogen gas generating device.

Background

Nitrogen is commonly used in the technical field of food preservation and detection, for example, a large amount of nitrogen is needed in food safety detection and liquid chromatograph-mass spectrometer equipment in a laboratory; most of nitrogen in the fields is supplied by a nitrogen bottle or a liquid nitrogen tank, the nitrogen bottle is limited in volume, needs to be replaced frequently, cannot ensure safety, and can cause certain waste, and the replacement of the liquid nitrogen tank needs manual control and consumes a large amount of manpower. Therefore, an intelligent nitrogen generator is an effective solution to on-site nitrogen supply. Different brands of LC-MS require different gases, some only, and some require three gases, nitrogen, dry air and zero-order air. Different nitrogen generator specifications are therefore required to meet the use requirements of different instruments.

Air compressed by the air compressor has large water vapor and impurities, so that the requirement on primary filtration is high, two solutions are provided in the prior art, one adopts a low-cost filtering component to reduce the cost, and the air compressor has the defects that shutdown maintenance is required frequently, and the production influence is large; the second uses a better quality filter to extend the replacement cycle, but this filter is more costly while still requiring downtime.

SUMMERY OF THE UTILITY MODEL

The utility model provides a nitrogen gas generating device to prior art's shortcoming.

In order to solve the technical problem, the utility model discloses a following technical scheme can solve:

a nitrogen generating device comprises an air compressor, a cold dryer and an air buffer tank connected with the cold dryer through a pipeline, wherein the air buffer tank is also connected with a nitrogen storage tank through a pipeline; and the nitrogen storage tank and the nitrogen outlet end are provided with a filtering component.

Preferably, the air conditioner further comprises a control system, the control system comprises a controller, the controller is connected with the air compressor and the cooling dryer, a first pressure transmitter is arranged at the air outlet end of the air buffer tank, a second pressure transmitter is arranged at the air outlet end of the nitrogen gas storage tank, and the first pressure transmitter and the second pressure transmitter are connected with the controller.

Preferably, the gas outlet end of the nitrogen gas storage tank is also provided with a purity analyzer, and the purity analyzer is connected with the controller.

Preferably, the number of the bypassed compressed air pipelines is 2, one compressed air pipeline is a dry air pipeline, a throttle valve and a pressure reducing valve are arranged on the dry air pipeline, and the other compressed air pipeline is a zero-level air pipeline.

Preferably, a first steam-water separator and a first filter are arranged between the air compressor and the cold dryer, a second filtering pipeline is further connected between the air compressor and the cold dryer, a first pneumatic butterfly valve for controlling the second filtering pipeline to be switched on and off is arranged on the second filtering pipeline, a second steam-water separator and a second filter are arranged on the second filtering pipeline, a second pneumatic butterfly valve is arranged at the air inlet end of the first steam-water separator, and the first pneumatic butterfly valve and the second pneumatic butterfly valve are in a parallel connection state.

Preferably, a third filter and a pressure reducing valve are arranged between the air buffer tank and the nitrogen membrane group.

Preferably, a fourth filter, a throttle valve and a pressure reducing valve are provided between the nitrogen gas storage tank and the nitrogen gas outlet.

Through the technical scheme, the utility model discloses following technological effect has:

the utility model discloses a membrane separation nitrogen making technology and intelligent integrated design, the gaseous operation requirement of liquid chromatography-mass spectrometer of different brands can be satisfied simultaneously to an equipment, both can provide nitrogen gas, dry air and three kinds of gases of zero order air simultaneously and also can only provide nitrogen gas to realized intelligent control and monitoring, had with the advantage of gas convenient, economy and safety. In addition, the running process of the equipment does not need to stop the compressor and the cold dryer, so that the production benefit is higher.

Drawings

Fig. 1 is a schematic view of the overall structure of the device.

The names of the parts indicated by the numerical references in the drawings are as follows: the system comprises an air compressor, a cooling dryer, an air buffer tank, a nitrogen storage tank, a nitrogen membrane group, a controller, a first pressure transmitter, a second pressure transmitter, a purity analyzer, a dry air pipeline, a zero-level air pipeline, a controller, a first pressure transmitter, a second pressure transmitter, a purity analyzer, a dry air pipeline, a zero-level air pipeline, a steam-water separator, a first filter, a second filter pipeline, a 17-second steam-water separator, a second filter, a pneumatic butterfly valve, a third filter and a fourth filter, wherein the air compressor, the cooling dryer, the air buffer tank, the nitrogen storage tank, the dry air pipeline, the dry air buffer tank, the pneumatic butterfly valve, the dry air separator, the dry air pipeline, the zero-level air separator, the dry air pipeline.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

A nitrogen generating device comprises an air compressor 1, a cold dryer 2 and an air buffer tank 3 connected with the cold dryer 2 through a pipeline, wherein the air buffer tank 3 is also connected with a nitrogen storage tank 4 through a pipeline, a nitrogen membrane group 5 is arranged on the pipeline between the nitrogen storage tank 4 and the air buffer tank 3, and a compressed air pipeline is bypassed on the pipeline between the nitrogen membrane group 5 and the air buffer tank 3; and the nitrogen storage tank 4 and the nitrogen outlet end are provided with filtering components.

The scheme comprises an air compression part and an air purification part, and specifically comprises the following steps: air is compressed by an air compressor 1, and a part of moisture is removed by a steam-water separator; compressed air enters the freezing type 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 bypass compressed air pipeline is 2, one compressed air pipeline is a dry air pipeline 11, a throttle 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 divided into two pipelines through a precision filter, one pipeline is zero-level air, the other pipeline is dry air, and the two pipelines are respectively regulated in flow by a throttle valve and reduced in pressure by a pressure valve and then sent to the pipeline to meet the air pressure requirement of an instrument.

In this embodiment, still include control system, control system includes controller 6, and controller 6 is connected with air compressor machine 1 and cold machine 2 futilely, and the end of giving vent to anger of air buffer tank 3 is provided with first pressure transmitter 7, and the end of giving vent to anger of nitrogen gas holder 4 is provided with second pressure transmitter 8, and first pressure transmitter 7 and second pressure transmitter 8 are connected with controller 6. The pressure of the air buffer tank 3 and the pressure of the nitrogen buffer tank are obtained through the pressure transmitter, and the power of the compressor and even the start and stop of the compressor are sequentially controlled.

In this embodiment, the gas outlet end of the nitrogen gas storage tank 4 is further provided with a purity analyzer 9, and the purity analyzer 9 is connected with the controller 6. Membrane separation nitrogen production: by the membrane separation technology, the purified compressed air is separated from main components of oxygen and nitrogen in the air by a special nitrogen-making module, and the concentration of the nitrogen is 95-99.5%. Wherein the purity appearance can detect the concentration of nitrogen gas, when nitrogen gas concentration is obvious unusual, then shows that nitrogen membrane group 5 breaks down, in time maintains and changes.

In this embodiment, be provided with first vapor-water separator 14 and first filter 15 between air compressor machine 1 and the cold machine of doing 2, still be connected with second filter line 16 between air compressor machine 1 and the cold machine of doing 2, be provided with the first pneumatic butterfly valve 19 of control second filter line 16 break-make on second filter line 16, second filter line 16 is provided with second vapor-water separator 17 and second filter 18, the inlet end of first vapor-water separator 14 is provided with second pneumatic butterfly valve 20, first pneumatic butterfly valve 19 and second pneumatic butterfly valve 20 are in the parallel state. This scheme adopts two sets of filter assembly to use, adopts the redundant design promptly, first pneumatic butterfly valve 19 and second pneumatic butterfly valve 20 all through solenoid valve control, the solenoid valve is connected with controller 6, first pneumatic butterfly valve 19 and second pneumatic butterfly valve 20 only work one at the same time.

In this embodiment, a third filter 21 and a pressure reducing valve are disposed between the air buffer tank 3 and the nitrogen membrane module 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 gas outlet. And the nitrogen prepared by the nitrogen membrane group 5 is sent to a nitrogen storage tank for storage, filtered by a precision filter, regulated by a throttle valve and decompressed by a pressure valve, and finally sent to a pipeline to meet the nitrogen pressure requirement of the instrument. This scheme adopts membrane separation nitrogen making technology and intelligent integrated design, and a equipment can satisfy the gaseous operation requirement of the liquid chromatography-mass spectrometer of different brands simultaneously, both can provide nitrogen gas, dry air and three kinds of gases of zero order air simultaneously and also can only provide nitrogen gas to intelligent control and monitoring have been realized, have with the advantage of gas convenient, economy and safety. In addition, the compressor and the cold drying machine 2 do not need to be stopped in the running process of the equipment, and the production benefit is higher.

Example 2

This embodiment is different from embodiment 1 in that: the controller 6 is a PLC controller 6.

Example 3

This embodiment is different from embodiment 1 in that:

air compression: air is compressed to 0.5-1.2MPa by an air compressor 1, and a part of water is removed by a steam-water separator.

Air purification: compressed air enters a freezing type dryer through a steam-water separator and a primary filter to reduce the dew point temperature, and then enters an 8L-15L air buffer tank 3 for storage.

Adjusting with nitrogen gas: and (3) sending the nitrogen prepared by the nitrogen membrane group 5 to a 3-6L nitrogen storage tank for storage, filtering by a precision filter, regulating the flow by a throttle valve, reducing the pressure by a pressure valve, and finally sending to a pipeline to meet the nitrogen use pressure requirement of the instrument.

Claims

1. A nitrogen gas generating device is characterized in that: the air cooling and drying device comprises an air compressor (1), a cooling and drying machine (2) and an air buffer tank (3) connected with the cooling and drying machine (2) through a pipeline, wherein the air buffer tank (3) is also connected with a nitrogen storage tank (4) through a pipeline, a nitrogen membrane group (5) is arranged on the pipeline between the nitrogen storage tank (4) and the air buffer tank (3), and a compressed air pipeline is bypassed on the pipeline between the nitrogen membrane group (5) and the air buffer tank (3); and the nitrogen storage tank (4) and the nitrogen outlet end are provided with filter components.

2. A nitrogen gas generation device in accordance with claim 1, wherein: still include control system, control system includes controller (6), and controller (6) are connected with air compressor machine (1) and cold dry machine (2), and the end of giving vent to anger of air buffer tank (3) is provided with first pressure transmitter (7), and the end of giving vent to anger of nitrogen gas holder (4) is provided with second pressure transmitter (8), and first pressure transmitter (7) and second pressure transmitter (8) are connected with controller (6).

3. A nitrogen generating apparatus according to claim 2, wherein: the gas outlet end of the nitrogen gas storage tank (4) is also provided with a purity analyzer (9), and the purity analyzer (9) is connected with the controller (6).

4. A nitrogen gas generation device in accordance with claim 1, wherein: the bypass compressed air pipeline is 2, one compressed air pipeline is a dry air pipeline (11), a throttle 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).

5. A nitrogen gas generation device in accordance with claim 4, wherein: a first steam-water separator (14) and a first filter (15) are arranged between the air compressor (1) and the cold dryer (2), a second filtering pipeline (16) is further connected between the air compressor (1) and the cold dryer (2), a first pneumatic butterfly valve (19) for controlling the second filtering pipeline (16) to be switched on and off is arranged on the second filtering pipeline (16), a second steam-water separator (17) and a second filter (18) are arranged on the second filtering pipeline (16), a second pneumatic butterfly valve (20) is arranged at the air inlet end of the first steam-water separator (14), and the first pneumatic butterfly valve (19) and the second pneumatic butterfly valve (20) are in a parallel connection state.

6. A nitrogen gas generation device in accordance with claim 1, wherein: a third filter (21) and a pressure reducing valve are arranged between the air buffer tank (3) and the nitrogen membrane group (5).

7. A nitrogen gas generation device in accordance with claim 1, wherein: a fourth filter (22), a throttle valve and a pressure reducing valve are arranged between the nitrogen storage tank (4) and the nitrogen outlet.