Nitrogen supply system

Abstract

The utility model provides a nitrogen supply system which comprises a pressure swing adsorption nitrogen making unit, a quenching device, a first gas conveying pipeline, a second gas conveying pipeline and a third gas conveying pipeline, external compressed air is connected with the input end of the pressure swing adsorption nitrogen making unit through the first gas conveying pipeline, and the pressure swing adsorption nitrogen making unit is used for adsorbing and discharging nitrogen in the compressed air. The output end of the pressure swing adsorption nitrogen making unit is connected with the input end of the quenching device through a second gas pipeline, the quenching device cools high-temperature nitrogen output by the pressure swing adsorption nitrogen making unit to improve the purity of the nitrogen, and the output end of the quenching device is connected with the gas supply end of the production workshop through a third gas pipeline. A nitrogen storage tank is arranged between the pressure swing adsorption nitrogen generation unit and the quenching device and is used for storing redundant nitrogen, adjusting the nitrogen amount and carrying out flow peak regulation; and a first water escape valve is arranged, accumulated water generated by gathering nitrogen in the second gas conveying pipeline is discharged, and the nitrogen purity is improved in an auxiliary mode.

Description

Technical Field

[0001] The utility model relates to the technical field of gas separation, and more specifically, to a nitrogen gas supply system. Background Art

[0002] High-purity nitrogen gas is a basic gas for important basic industries such as electronics and metallurgy. In analytical industries such as chromatography, a large amount of standard gas is also required, and most of these standard gases are required to have very low impurity content.

[0003] In the prior art, the nitrogen gas supply system closest to the present application has the publication number: CN104944390B, a gas supply device and method for a nitrogen sulfidation process, which relates to a gas supply device for a nitrogen sulfidation process, including a nitrogen gas generation system having an inlet and an outlet. The nitrogen gas generation system is a pressure swing adsorption nitrogen generation system. An air pretreatment system for purifying air to obtain clean air is provided upstream of the nitrogen gas generation system, and a nitrogen gas treatment system for regulating the pressure of nitrogen gas and then sending it to a corresponding position in the nitrogen sulfidation system is provided downstream of the nitrogen gas generation system.

[0004] Currently, most use cryogenic air separation to produce liquid nitrogen and then purify it after vaporization. The production process is complex, with high costs and large energy consumption.

[0005] In view of this, the utility model proposes a nitrogen gas supply system with low cost, low energy consumption, and simple structure. Summary of the Utility Model

[0006] The utility model proposes a nitrogen gas supply system with low cost, low energy consumption, and simple structure.

[0007] A nitrogen gas supply system includes a pressure swing adsorption nitrogen generation unit, a quench cooler, a first gas transmission pipeline, a second gas transmission pipeline, and a third gas transmission pipeline. It is characterized in that: external compressed air is connected to the input end of the pressure swing adsorption nitrogen generation unit through the first gas transmission pipeline. The pressure swing adsorption nitrogen generation unit is used to adsorb and discharge nitrogen in the compressed air. The output end of the pressure swing adsorption nitrogen generation unit is connected to the input end of the quench cooler through the second gas transmission pipeline. The quench cooler is used to cool the high-temperature nitrogen gas output by the pressure swing adsorption nitrogen generation unit to improve the nitrogen purity. The output end of the quench cooler is connected to the gas supply end of the production workshop through the third gas transmission pipeline.

[0008] Furthermore, a nitrogen gas storage tank is also provided between the pressure swing adsorption nitrogen generation unit and the quench cooler. The nitrogen gas storage tank is used to store excess nitrogen gas, adjust the amount of nitrogen gas, perform flow peak shaving, store the excess nitrogen gas to cope with sudden high usage in the workshop, so that the pressure swing adsorption nitrogen generation unit does not need to work continuously, and the service life of the pressure swing adsorption nitrogen generation unit is prolonged.

[0009] Furthermore, the quencher includes a quencher body and a demineralized water spray head. A cooling reaction chamber is provided inside the quencher body. One end of the cooling reaction chamber is provided with an air inlet, and the other end is provided with an air outlet. The output end of the pressure swing adsorption nitrogen generation unit is connected to the air inlet through a second gas pipeline, and the air outlet is connected to the air supply end of the production workshop through a third gas pipeline. A plurality of demineralized water spray heads are arranged in a spaced annular manner near the air outlet end of the cooling reaction chamber. The demineralized water spray heads are used to spray demineralized water to cool the nitrogen gas at 30°C - 40°C to 20°C, and the annular arrangement enables full coverage treatment.

[0010] Furthermore, a first drain valve is also provided near the input end of the quencher on the second gas pipeline, which is used to discharge the accumulated water generated by the nitrogen gas in the second gas pipeline, and assist in improving the nitrogen purity.

[0011] Furthermore, a drain port is provided at the bottom of the quencher, and a second drain valve is provided at the drain port, which is used to discharge the accumulated water generated by the quencher.

[0012] Furthermore, an arch is provided in the middle of the third gas pipeline, and the arch is 30 cm, which is convenient for the thermal expansion and contraction of the pipeline to improve the structural strength.

[0013] Furthermore, the pressure swing adsorption nitrogen generation unit includes a plurality of pressure swing adsorption nitrogen generators, which are connected in parallel. External compressed air is connected to the input end of each pressure swing adsorption nitrogen generator through a first gas pipeline, and the output end of each pressure swing adsorption nitrogen generator is connected to the input end of the quencher through a second gas pipeline. The outlet pressure of the pressure swing adsorption nitrogen generator is 0.6 MPa, and the nitrogen production capacity is 800 m3 / h.

[0014] Furthermore, a ball valve is provided at both the output end and the input end of each pressure swing adsorption nitrogen generator, which is used to control the input and output flow rates of the pressure swing adsorption nitrogen generator.

[0015] Furthermore, a first pressure gauge and a first pressure sensor are sequentially arranged on the first gas pipeline from left to right. The first pressure gauge and the first pressure sensor are used to monitor the pressure at the input end of the compressed air.

[0016] Furthermore, a second pressure gauge and a second pressure sensor are sequentially arranged on the third gas pipeline from left to right. The second pressure gauge and the second pressure sensor are used to monitor the pressure at the output end of the quencher.

[0017] Advantages of the present utility model: The present utility model provides a nitrogen gas supply system, which includes a pressure swing adsorption nitrogen generation unit, a quenching cooler, a first gas transmission pipeline, a second gas transmission pipeline, and a third gas transmission pipeline. External compressed air is connected to the input end of the pressure swing adsorption nitrogen generation unit through the first gas transmission pipeline. The pressure swing adsorption nitrogen generation unit is used to adsorb and discharge nitrogen in the compressed air. The output end of the pressure swing adsorption nitrogen generation unit is connected to the input end of the quenching cooler through the second gas transmission pipeline. The quenching cooler is used to cool the high-temperature nitrogen gas output by the pressure swing adsorption nitrogen generation unit to improve the nitrogen purity. The output end of the quenching cooler is connected to the gas supply end of the production workshop through the third gas transmission pipeline. The nitrogen generation process is simple and the cost is low. A nitrogen gas storage tank is provided between the pressure swing adsorption nitrogen generation unit and the quenching cooler. The nitrogen gas storage tank is used to store excess nitrogen gas, adjust the amount of nitrogen gas, and perform flow peak regulation. The excess nitrogen gas is stored to cope with sudden high usage in the workshop, so that the pressure swing adsorption nitrogen generation unit does not need to work continuously, and the service life of the pressure swing adsorption nitrogen generation unit is prolonged. A first drain valve is provided to drain the accumulated water generated by the nitrogen gas in the second gas transmission pipeline, which helps to improve the nitrogen purity. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of a nitrogen gas supply system of the present application.

[0019] Description of the Main Component Symbols

[0020] Pressure swing adsorption nitrogen generation unit 1, quenching cooler 2, quenching cooler body 21, desalted water spray head 22, cooling reaction chamber 23, first gas transmission pipeline 3, first pressure gauge 31, first pressure sensor 32, second gas transmission pipeline 4, third gas transmission pipeline 5, second pressure gauge 51, second pressure sensor 52, nitrogen gas storage tank 6, first drain valve 7, second drain valve 8, arch 9, pressure swing adsorption nitrogen generator 10, ball valve 11.

[0021] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0022] The following embodiments are described to assist in understanding the present application. The embodiments are not and should not be construed in any way as limiting the protection scope of the present application.

[0023] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or integrated together (including being integrated within a single system or component).

[0024] At the same time, the connections between components or systems are not intended to be limited to direct connections. Instead, the data between these components can be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

[0025] Embodiment 1:

[0026] As Figure 1 shown, it is a schematic structural diagram of a nitrogen gas supply system of the present application.

[0027] A nitrogen gas supply system includes a pressure swing adsorption nitrogen production unit 1, a quench cooler 2, a first gas transmission pipeline 3, a second gas transmission pipeline 4, and a third gas transmission pipeline 5, and is characterized in that: external compressed air is connected to the input end of the pressure swing adsorption nitrogen production unit 1 through the first gas transmission pipeline 3. The pressure swing adsorption nitrogen production unit 1 is used to adsorb and discharge nitrogen in the compressed air. The output end of the pressure swing adsorption nitrogen production unit 1 is connected to the input end of the quench cooler 2 through the second gas transmission pipeline 4. The quench cooler 2 is used to cool the high-temperature nitrogen gas output by the pressure swing adsorption nitrogen production unit 1 to improve the nitrogen purity. The output end of the quench cooler 2 is connected to the gas supply end of the production workshop through the third gas transmission pipeline 5.

[0028] Furthermore, a nitrogen gas storage tank 6 is also provided between the pressure swing adsorption nitrogen production unit 1 and the quench cooler 2. The nitrogen gas storage tank 6 is used to store excess nitrogen gas, adjust the nitrogen gas volume, perform flow peak shaving, store the excess nitrogen gas to cope with sudden high usage in the workshop, so that the pressure swing adsorption nitrogen production unit 1 does not need to work continuously, and the service life of the pressure swing adsorption nitrogen production unit 1 is improved.

[0029] Furthermore, the quench cooler 2 includes a quench cooler body 21 and a desalted water spray head 22. A cooling reaction chamber 23 is provided inside the quench cooler body 21. One end of the cooling reaction chamber 23 is provided with an air inlet, and the other end of the cooling reaction chamber 23 is provided with an air outlet. The output end of the pressure swing adsorption nitrogen production unit 1 is connected to the air inlet through the second gas transmission pipeline 4, and the air outlet is connected to the gas supply end of the production workshop through the third gas transmission pipeline 5. A plurality of desalted water spray heads 22 are annularly arranged at intervals near the air outlet end of the cooling reaction chamber 23. The desalted water spray heads 22 are used to spray desalted water to cool the nitrogen gas at 30°C - 40°C to 20°C, and the annular arrangement enables full coverage treatment.

[0030] Furthermore, a first drain valve 7 is also provided near the input end of the quench cooler 2 on the second gas transmission pipeline 4, which is used to discharge the accumulated water generated by the nitrogen gas in the second gas transmission pipeline 4 to assist in improving the nitrogen purity.

[0031] Further, a drain outlet is provided at the bottom of the quenching cooler 2, and a second drain valve 8 is provided at the drain outlet for discharging the accumulated water generated in the quenching cooler 2.

[0032] Further, an arch 9 is provided in the middle of the third gas transmission pipeline 5, and the arch 9 is 30 cm, which is convenient for the thermal expansion and contraction of the pipeline to improve the structural strength.

[0033] Further, the pressure swing adsorption nitrogen generation unit 1 includes a plurality of pressure swing adsorption nitrogen generators 10, and the plurality of pressure swing adsorption nitrogen generators 10 are connected in parallel. External compressed air is connected to the input end of each pressure swing adsorption nitrogen generator 10 through the first gas transmission pipeline 3, and the output end of each pressure swing adsorption nitrogen generator 10 is connected to the input end of the quenching cooler 2 through the second gas transmission pipeline 4. The outlet pressure of the pressure swing adsorption nitrogen generator 10 is 0.6 MPa, and the nitrogen production capacity is 800 m3 / h.

[0034] Further, a ball valve 11 is provided at the output end and the input end of each pressure swing adsorption nitrogen generator 10 for controlling the input and output flow rates of the pressure swing adsorption nitrogen generator 10.

[0035] Further, a first pressure gauge 31 and a first pressure sensor 32 are sequentially provided on the first gas transmission pipeline 3 from left to right. The first pressure gauge 31 and the first pressure sensor 32 are used to monitor the pressure at the input end of the compressed air.

[0036] Further, a second pressure gauge 51 and a second pressure sensor 52 are sequentially provided on the third gas transmission pipeline 5 from left to right. The second pressure gauge 51 and the second pressure sensor 52 are used to monitor the pressure at the output end of the quenching cooler 2.

[0037] The beneficial effects of the present utility model: The present utility model provides a nitrogen gas supply system, including a pressure swing adsorption nitrogen generation unit 1, a quenching cooler 2, a first gas transmission pipeline 3, a second gas transmission pipeline 4, and a third gas transmission pipeline 5. External compressed air is connected to the input end of the pressure swing adsorption nitrogen generation unit 1 through the first gas transmission pipeline 3. The pressure swing adsorption nitrogen generation unit 1 is used to adsorb and discharge nitrogen in the compressed air. The output end of the pressure swing adsorption nitrogen generation unit 1 is connected to the input end of the quenching cooler 2 through the second gas transmission pipeline 4. The quenching cooler 2 is used to cool the high-temperature nitrogen gas output by the pressure swing adsorption nitrogen generation unit 1 to improve the nitrogen purity. The output end of the quenching cooler 2 is connected to the gas supply end of the production workshop through the third gas transmission pipeline 5. The nitrogen production process is simple and the cost is low. A nitrogen gas storage tank 6 is provided between the pressure swing adsorption nitrogen generation unit 1 and the quenching cooler 2. The nitrogen gas storage tank 6 is used to store excess nitrogen gas, adjust the nitrogen gas volume, and perform flow peak shaving. The excess nitrogen gas is stored to cope with sudden high usage in the workshop, so that the pressure swing adsorption nitrogen generation unit 1 does not need to work continuously, and the service life of the pressure swing adsorption nitrogen generation unit 1 is improved; a first drain valve 7 is provided to discharge the accumulated water generated by the nitrogen gas in the second gas transmission pipeline 4, which helps to improve the nitrogen purity.

[0038] Although the present application has disclosed multiple aspects and embodiments, other aspects and embodiments will be obvious to those skilled in the art. Without departing from the concept of the present application, several modifications and improvements can be made, and these all fall within the protection scope of the present application. The multiple aspects and embodiments disclosed in the present application are only for illustrative purposes and are not intended to limit the present application. The actual protection scope of the present application is subject to the claims.

Claims

1. A nitrogen supply system, comprising a pressure swing adsorption nitrogen generator (1), a quencher (2), a first gas pipeline (3), a second gas pipeline (4), and a third gas pipeline (5), characterized in that: External compressed air is connected to an input end of a pressure swing adsorption nitrogen making unit (1) through a first gas transmission pipeline (3); the pressure swing adsorption nitrogen making unit (1) is used to adsorb and discharge nitrogen in the compressed air; the output end of the pressure swing adsorption nitrogen making unit (1) is connected to an input end of a quencher (2) through a second gas transmission pipeline (4); the quencher (2) is used to cool high-temperature nitrogen output from the pressure swing adsorption nitrogen making unit (1) to increase nitrogen purity; the output end of the quencher (2) is connected to an air supply end of a production workshop through a third gas transmission pipeline (5).

2. The nitrogen supply system according to claim 1, characterized in that: A nitrogen storage tank (6) is also provided between the pressure swing adsorption nitrogen generator unit (1) and the quencher (2).

3. The nitrogen supply system according to claim 1, characterized in that: The quencher (2) comprises a quencher body (21) and a desalted water nozzle (22). A cooling reaction chamber (23) is provided in the quencher body (21). An air inlet is provided at one end of the cooling reaction chamber (23), and an air outlet is provided at the other end of the cooling reaction chamber (23). The output end of the pressure swing adsorption nitrogen generator (1) is connected to the air inlet via a second air pipeline (4), and the air outlet is connected to the air supply end of the production workshop via a third air pipeline (5). A plurality of desalted water nozzles (22) are provided in an annular manner at intervals near the air outlet end of the cooling reaction chamber (23). The desalted water nozzles (22) are used to spray desalted water so that the nitrogen at 30°C-40°C is cooled to 20°C.

4. The nitrogen supply system according to claim 1, characterized in that: The second gas transmission pipeline (4) is also provided with a first drain valve (7) near the input end of the quencher (2) for discharging accumulated water generated by nitrogen accumulation in the second gas transmission pipeline (4), thereby assisting in improving the purity of the nitrogen.

5. The nitrogen supply system according to claim 1, characterized in that: The bottom of the quencher (2) is also provided with a drainage outlet, and a second drain valve (8) is provided at the drainage outlet for draining the accumulated water generated by the quencher (2).

6. The nitrogen supply system according to claim 1, characterized in that: A bulge (9) is provided in the middle of the third gas transmission pipeline (5), and the bulge (9) is 30 cm.

7. The nitrogen supply system according to claim 1, characterized in that: The pressure swing adsorption nitrogen generator set (1) comprises a plurality of pressure swing adsorption nitrogen generators (10), the plurality of pressure swing adsorption nitrogen generators (10) are connected in parallel, external compressed air is connected to the input end of each pressure swing adsorption nitrogen generator (10) through a first gas transmission pipeline (3), the output end of each pressure swing adsorption nitrogen generator (10) is connected to the input end of a quencher (2) through a second gas transmission pipeline (4), the outlet pressure of the pressure swing adsorption nitrogen generator (10) is 0.6 MPa, and the nitrogen production capacity is 800 m3 / h.

8. The nitrogen supply system according to claim 1, characterized in that: A ball valve (11) is provided at the output end and the input end of each pressure swing adsorption nitrogen generator (10) for controlling the input and output flow of the pressure swing adsorption nitrogen generator (10).

9. The nitrogen supply system according to claim 1, characterized in that: The first gas transmission pipeline (3) is provided with a first pressure gauge (31) and a first pressure sensor (32) from left to right, and the first pressure gauge (31) and the first pressure sensor (32) are used to monitor the pressure at the compressed air input end.

10. The nitrogen supply system according to claim 1, characterized in that: The third gas transmission pipeline (5) is provided with a second pressure gauge (51) and a second pressure sensor (52) from left to right, and the second pressure gauge (51) and the second pressure sensor (52) are used to monitor the pressure at the output end of the quencher (2).

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