Liquid seal tank automatic control system with gas-liquid separation function

Abstract

The utility model discloses a liquid seal tank automatic control system with a gas-liquid separation function, which is characterized in that the top of a liquid seal tank is provided with an exhaust port which is connected with a hydrogen emptying pipeline, and the hydrogen emptying pipeline is provided with a hydrogen pressure control valve group; the top of the liquid seal tank is provided with a pressure gauge port connected with an in-situ pressure gauge group; a nitrogen inlet and a water replenishing port are formed in the side surface of the liquid seal tank; the nitrogen inlet is connected with a nitrogen supplementing pipeline and is provided with a nitrogen adjusting valve group which is linked with the in-situ pressure gauge group; the liquid seal tank is provided with a hydrogen and condensate inlet below the water replenishing port, and a hydrogen and condensate connecting pipeline enters from the hydrogen and condensate inlet and extends to the bottom of the liquid seal tank; a liquid level meter assembly is arranged on the side surface of the liquid seal tank; a liquid outlet is formed in the bottom of the liquid seal tank and connected with a condensate discharge pipeline and a liquid discharge control valve set to be linked with the liquid level meter assembly. According to the device, hydrogen and a small amount of condensate entrained in the condensate water discharging process of a purification system and a post-treatment system in the water electrolysis hydrogen production process are solved, and the hydrogen content is neutralized.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid seal tank technical field especially is related to a liquid seal tank automatic control system with gas -liquid separation function. BACKGROUND

[0002] The condensate water is produced in the production process of the post-processing and purification system of the alkaline electrolytic cell water electrolysis hydrogen production, and the hydrogen and a small amount of condensate are brought out in the discharge process due to the high pressure of the system itself, so that the environment or safety is influenced greatly if the hydrogen and the condensate are not further washed and absorbed. SUMMARY

[0003] The utility model discloses a liquid seal tank automatic control system with gas -liquid separation function.

[0004] Technical scheme: the utility model discloses a liquid seal tank automatic control system with gas -liquid separation function, including liquid seal tank;

[0005] The liquid seal tank top is equipped with the exhaust port, the exhaust port connects hydrogen emptying pipeline, hydrogen emptying pipeline is equipped with hydrogen pressure control valve group on it;

[0006] The liquid seal tank top is equipped with the pressure gauge mouth, and the pressure gauge mouth is connected with the local pressure gauge group;

[0007] The liquid seal tank side is equipped with nitrogen inlet and water supplement mouth, and the nitrogen inlet is located above the water supplement mouth, and the water supplement mouth is connected with water supplement pipeline;Nitrogen inlet is connected with nitrogen supplement pipeline, and nitrogen supplement pipeline is equipped with nitrogen regulating valve group, and nitrogen regulating valve group is linked with local pressure gauge group;

[0008] The liquid seal tank is equipped with hydrogen and condensate inlet below the water supplement mouth, and hydrogen and condensate inlet is connected with hydrogen and condensate pipeline, and hydrogen and condensate pipeline extends to the bottom of liquid seal tank from hydrogen and condensate inlet;

[0009] The liquid seal tank bottom is equipped with the liquid level meter assembly;

[0010] The liquid seal tank bottom is equipped with the liquid level meter assembly;

[0011] Further, the liquid seal tank is a three-dimensional cylindrical container structure.

[0012] Further, the hydrogen pressure control valve group includes gas emptying valve and back pressure valve arranged in sequence from the exhaust port, and a flame arrester is arranged behind the back pressure valve.

[0013] Furthermore, the local pressure gauge group includes a pressure gauge root valve, a pressure transmitter, and a local pressure gauge arranged sequentially from the pressure gauge port.

[0014] Furthermore, a water inlet ball valve is provided at the water inlet.

[0015] Furthermore, the nitrogen regulating valve assembly includes a check valve and a nitrogen regulating valve connected in sequence from the nitrogen inlet. The nitrogen regulating valve is connected to a local pressure gauge assembly to maintain pressure balance inside the tank.

[0016] Furthermore, a hydrogen and condensate ball valve is provided at the hydrogen and condensate inlet.

[0017] Furthermore, the side of the liquid-sealed tank is provided with an upper liquid level gauge interface and a lower liquid level gauge interface, which are connected to a magnetic float liquid level gauge and a liquid level transmitter.

[0018] Furthermore, the drain control valve assembly includes a drain ball valve and a drain control valve connected in sequence from the drain port, and the drain control valve is connected to the level gauge assembly.

[0019] Beneficial effects: Compared with the prior art, the advantages of this utility model are:

[0020] 1. The entire device and system has a simple structure, requires minimal manual operation, features intelligent control, and has a low cost;

[0021] 2. By adsorbing pure water inside the tank, the condensate entrained in the hydrogen can be effectively collected, reducing pollution and achieving zero emissions;

[0022] 3. By injecting nitrogen, the cost is low, and on the one hand, it can effectively ensure the system pressure, and on the other hand, it can dilute the hydrogen, greatly increasing the safety of hydrogen emission.

[0023] 4. Through a series of control valve groups and gauges, interlocking control can be achieved. The whole set of equipment has a high degree of automation, reducing the operation of on-site workers, improving the stability of the system, and effectively solving the problem of hydrogen and a small amount of condensate entrained in the condensate discharge process of the purification system and post-treatment system during the electrolysis of water to produce hydrogen, further neutralizing the hydrogen content to ensure safety. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structural connection of this utility model. Detailed Implementation

[0025] like Figure 1 The automatic control system for a liquid-sealed tank with gas-liquid separation function shown includes a liquid-sealed tank 1, which is a three-dimensional cylindrical container structure.

[0026] The liquid-sealed tank 1 has an exhaust port N1 at its top, which is connected to a hydrogen venting pipeline A. A hydrogen pressure control valve assembly is installed on the hydrogen venting pipeline A. The hydrogen pressure control valve assembly includes a gas venting valve 2 and a back pressure valve 3 arranged sequentially from the exhaust port N1, with a flame arrester 4 installed downstream of the back pressure valve 3. During operation, the gas venting valve 2 is normally open. Once the pressure inside the container reaches the set pressure of the back pressure valve 3, excess gas in the tank will be discharged to the venting pipeline to maintain the pressure inside the tank.

[0027] The top of the liquid-sealed tank 1 has a pressure gauge port N2, which is connected to a local pressure gauge group. The local pressure gauge group includes a pressure gauge root valve 5, a pressure transmitter 6, and a local pressure gauge 7 arranged sequentially from the pressure gauge port N2.

[0028] The liquid-sealed tank 1 has a nitrogen inlet N3 and a water inlet N4 on its side. The nitrogen inlet N3 is located above the water inlet N4. The water inlet N4 is connected to the water supply pipeline B. A water supply ball valve 8 is provided at the water supply ball valve N4. Before the system is put into operation, the water supply ball valve 8 needs to be switched on and off to maintain a certain liquid level in the liquid-sealed tank.

[0029] The nitrogen inlet N3 is connected to the nitrogen replenishment pipeline C. The nitrogen replenishment pipeline C is equipped with a nitrogen regulating valve group, which is linked to the local pressure gauge group. The nitrogen regulating valve group includes a check valve 9 and a nitrogen regulating valve 10 connected in sequence from the nitrogen inlet N3. The nitrogen regulating valve 10 is connected to the root valve 5 of the pressure gauge. By replenishing an appropriate amount of nitrogen through the nitrogen regulating valve 10, the pressure inside the tank is maintained within a certain range.

[0030] The liquid-sealed tank 1 has a hydrogen and condensate inlet N5 located below the water inlet N4. A hydrogen and condensate ball valve 11 is provided at the hydrogen and condensate inlet N5. The hydrogen and condensate inlet N5 is connected to the hydrogen and condensate pipeline D, which enters from the hydrogen and condensate inlet N5 and extends to the bottom of the liquid-sealed tank 1. During operation, the gas and liquid enter through the hydrogen and condensate inlet N5, keeping the liquid level below the liquid level in the container. This serves two purposes: firstly, it acts as a liquid seal, and secondly, it absorbs the condensate mixed in the gas, thus achieving a washing effect.

[0031] The liquid-sealed tank 1 has an upper level gauge interface N6 and a lower level gauge interface N7 on its side, which are connected to a magnetic float level gauge 12 and a level transmitter 13. A drain port N8 is opened at the bottom of the liquid-sealed tank 1. The drain port N8 is connected to a condensate discharge pipeline E, which is connected to a drain control valve assembly. The drain control valve assembly includes a drain ball valve 14 and a drain control valve 15 connected sequentially from the drain port N8. The drain control valve 15 is connected to the magnetic float level gauge 12. When the liquid level reaches a certain height, the drain control valve 15 opens to discharge the liquid.

[0032] As described above, the liquid seal tank 1 achieves the functions of liquid sealing and automatic gas-liquid washing and discharge.

Claims

1. An automatic control system for a liquid-sealed tank with gas-liquid separation function, characterized in that, Including liquid-sealed tanks (1); The liquid-sealed tank (1) has an exhaust port (N1) at the top, the exhaust port (N1) is connected to a hydrogen venting pipeline (A), and a hydrogen pressure control valve group is provided on the hydrogen venting pipeline (A). The liquid seal tank (1) has a pressure gauge port (N2) on its top, and the pressure gauge port (N2) is connected to a local pressure gauge group. The liquid-sealed tank (1) has a nitrogen inlet (N3) and a water inlet (N4) on its side. The nitrogen inlet (N3) is located above the water inlet (N4), and the water inlet (N4) is connected to the water supply pipeline (B). The nitrogen inlet (N3) is connected to the nitrogen supply pipeline (C), and the nitrogen supply pipeline (C) is equipped with a nitrogen regulating valve group, which is linked to the local pressure gauge group. The liquid seal tank (1) has a hydrogen and condensate inlet (N5) located below the water inlet (N4). The hydrogen and condensate inlet (N5) is connected to the hydrogen and condensate pipeline (D). The hydrogen and condensate pipeline (D) enters from the hydrogen and condensate inlet (N5) and extends to the bottom of the liquid seal tank (1). The liquid seal tank (1) is equipped with a level gauge assembly on its side; The liquid seal tank (1) has a drain port (N8) at the bottom. The drain port (N8) is connected to the condensate discharge pipeline (E). The condensate discharge pipeline (E) is connected to the drain control valve group. The drain control valve group is linked with the level gauge assembly.

2. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The liquid-sealed tank (1) has a three-dimensional cylindrical container structure.

3. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The hydrogen pressure control valve group includes a gas vent valve (2) and a back pressure valve (3) arranged sequentially from the exhaust port (N1), and a flame arrester (4) is arranged behind the back pressure valve (3).

4. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The local pressure gauge group includes a pressure gauge root valve (5), a pressure transmitter (6), and a local pressure gauge (7) arranged sequentially from the pressure gauge port (N2).

5. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: A water supply ball valve (8) is provided at the water supply inlet (N4).

6. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The nitrogen regulating valve group includes a check valve (9) and a nitrogen regulating valve (10) connected in sequence from the nitrogen inlet (N3). The nitrogen regulating valve (10) is connected to a local pressure gauge group to maintain the pressure balance inside the tank.

7. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: A hydrogen and condensate ball valve (11) is provided at the hydrogen and condensate inlet (N5).

8. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The liquid seal tank (1) is provided with an upper liquid level gauge interface (N6) and a lower liquid level gauge interface (N7) on its side, and is connected to a magnetic float liquid level gauge (12) and a liquid level transmitter (13).

9. The automatic control system for a liquid-sealed tank with gas-liquid separation function according to claim 1, characterized in that: The drain control valve assembly includes a drain ball valve (14) and a drain control valve (15) connected in sequence from the drain port (N8), and the drain control valve (15) is connected to the level gauge assembly.

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