Zero-leakage air-backward-flow-preventing stepless-regulation coal gas diffusing device

Abstract

The utility model discloses a zero-leakage air-backward-flow-preventing stepless-regulation coal gas bleeding device which comprises a sealed water-sealed tank. A coal gas inlet pipe and a coal gas outlet are arranged in the water-sealed tank, and the coal gas outlet is positioned at the top of the water-sealed tank; accumulated water with a set height is stored in the water-sealed tank, the gas inlet pipe penetrates through the tank wall of the water-sealed tank and is arranged in the accumulated water, and the height difference between the water surface of the accumulated water and a pipe opening of the gas inlet pipe is the water-sealed height. Diffused gas enters the water seal tank through the gas inlet pipe, and when the gas pressure is enough to break the water seal, the gas can penetrate through the water seal, is discharged through the gas outlet and enters a torch for ignition and diffusion. And when the gas pressure is not enough, the gas is isolated in the pipe orifice of the gas inlet pipe by water, so that zero leakage of gas diffusion is realized. Besides, when an external gas pipeline system has negative pressure due to accidents, water in the water-sealed tank flows back into the gas inlet pipe, and the tail end of the inlet pipe is ensured to be always below the water surface, so that air backflow is prevented, and the safety of a gas pipeline network is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas discharge systems, and particularly relates to a zero-leakage and air-backflow-preventing steplessly adjustable gas discharge device. Background Art

[0002] In the prior art, for the gas discharge system in the metallurgical industry, the gas discharge pressure and the gas discharge volume are basically controlled by a regulating valve. There are the following problems with this discharge method:

[0003] 1. The regulating valve cannot be completely closed, and there is still a leakage rate of 1% in the fully closed state, resulting in the theft of gas discharge, causing unnecessary energy waste;

[0004] 2. In the initial stage of the project, there will be a large fluctuation in the gas volume and uneven discharge. Especially for the gas pipeline network connected to the pressurization system, a negative pressure may occur in the pipeline, resulting in air backflow from the discharge port, leaving potential safety hazards and even triggering safety accidents. Therefore, a discharge device with zero leakage and air-backflow prevention is particularly important. Content of the Utility Model

[0005] In view of the above defects existing in the prior art, a zero-leakage and air-backflow-preventing steplessly adjustable gas discharge device is provided, which can achieve zero leakage of gas discharge, prevent air backflow and realize stepless adjustment of the discharge pressure, and ensure the safety of gas discharge and the gas pipeline network.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0007] The zero-leakage and air-backflow-preventing steplessly adjustable gas discharge device includes a sealed water seal tank; a gas inlet pipe and a gas outlet are arranged in the water seal tank, and the gas outlet is located at the top of the water seal tank; a set height of accumulated water is stored in the water seal tank, the gas inlet pipe passes through the tank wall of the water seal tank and is placed in the accumulated water, and the height difference between the water surface of the accumulated water and the pipe orifice of the gas inlet pipe is the water seal height; the gas enters from the gas inlet pipe, and after the gas pressure at the pipe orifice of the gas inlet pipe exceeds the discharge pressure formed by the water pressure height, it enters the water seal tank and is sent to the flare for discharge from the gas outlet at the top of the water seal tank.

[0008] According to the above technical solution, the gas inlet pipe at least includes a first section and a second section. The first section is arranged through the tank wall of the water seal tank and communicates with the inner cavity of the water seal tank and the gas transmission pipeline; the top end of the second section is connected to the end of the first section located in the inner cavity of the water seal tank, and the bottom end of the second section is placed in the accumulated water in the water seal tank; the length of the second section in the vertical direction is greater than the set maximum water seal height.

[0009] According to the above technical solution, the first section is horizontally arranged and the second section is vertically arranged.

[0010] According to the above technical solution, a liquid level gauge, a water supply system and a drainage system are further provided in the water seal tank. One end of the water supply system is connected to an external water source, and the other end of the water supply system is connected to the side wall of the water seal tank, and the connection port is higher than the highest height of the set accumulated water; one end of the drainage system is connected to the bottom of the water seal tank, and the other end of the drainage system is connected to an external discharge pipeline; the liquid level gauge is arranged in the water seal tank and is used to display the water seal height.

[0011] According to the above technical solution, the water supply system includes a water supply pipeline, a water supply valve and a check valve arranged on the water supply pipeline, and a U-shaped water seal pipeline connected between the water supply pipeline and the water seal tank; one end of the water supply pipeline is connected to an external water source, and the check valve is arranged between the water supply valve and the U-shaped water seal pipeline;

[0012] The drainage system includes a drainage pipeline and a drainage valve arranged on the drainage pipeline. One end of the drainage pipeline is connected to the bottom of the water storage cavity of the water seal tank, and the other end is connected to an external drainage pipeline.

[0013] According to the above technical solution, bypass branches are also provided in both the water supply system and the drainage system. The bypass branch includes a bypass pipeline and a bypass valve arranged on the bypass pipeline. The two ends of the bypass pipeline are respectively connected to both ends of the water supply valve or the drainage valve, and one connection port of the bypass branch is arranged between the water supply valve and the check valve; a cut-off valve is respectively arranged on the water supply pipeline at both ends of the water supply valve or the drainage pipeline at both ends of the drainage valve, and the cut-off valve is located between the water supply valve and the bypass pipeline interface or between the drainage valve and the bypass pipeline interface;

[0014] When the liquid level gauge adopts a liquid level gauge with communication function, the bypass valve, the water supply valve and the drainage valve all adopt solenoid valves, and the four are electrically connected, and the opening and closing of the bypass valve, the water supply valve and the drainage valve are controlled by the liquid level gauge.

[0015] According to the above technical solution, the water seal tank is divided into upper and lower layers, and an arc-shaped partition is provided between the two layers. The area above the arc-shaped partition is used as the accumulated water storage cavity, and the area below the arc-shaped partition is used as the installation area of the drainage system. The connection port of the drainage system and the water seal tank is arranged at the lowest point of the arc-shaped partition.

[0016] According to the above technical solution, maintenance openings are provided on the tank walls in the areas above and below the arc-shaped partition.

[0017] According to the above technical solution, a pressure gauge is provided on the storage wall of the water seal tank; the height of the pressure gauge is greater than the height of the accumulated water liquid level corresponding to the maximum water seal height.

[0018] According to the above technical solution, a bimetallic thermometer is also provided on the side wall of the water seal tank, and the height of the bimetallic thermometer is greater than the height of the accumulated water liquid level corresponding to the maximum water seal height.

[0019] The utility model has the following beneficial effects:

[0020] 1. The gas inlet pipe is inserted into the water in the water seal tank. Since the height of the accumulated water is greater than the height of the pipe orifice of the gas inlet pipe, the accumulated water enters to the pipe orifice of the gas pipe, forming a water seal. The gas to be discharged enters the water seal tank through the gas inlet pipe. When the gas pressure is sufficient to break through the water seal, it can pass through the water seal, be discharged through the gas outlet, and enter the torch for ignition and discharge. When the gas pressure is insufficient, it is isolated inside the pipe orifice of the gas inlet pipe by the water. The determination of the water seal height is related to the gas discharge pressure. Assuming the gas discharge pressure is 8 kPa, the water seal height can be set to 790 mm. The pressure formed by the water seal height is slightly lower than the gas discharge pressure. Then, the gas pressure passing through the discharge regulating valve is 8 kPa, which can smoothly break through the water seal and be discharged into the torch for discharge. When the gas pressure is less than 8 kPa, the opening of the external regulating valve is adjusted to the minimum. Part of the internally leaked gas enters the water seal tank, but since the pressure is not enough to break through the water seal, it is isolated inside the inlet pipe, thus achieving zero leakage of gas discharge. In addition, when the external gas pipeline system has negative pressure due to an accident, the water in the water seal tank flows back into the gas inlet pipe, ensuring that the end of the inlet pipe is always below the water surface, thereby preventing air from flowing back and ensuring the safety of the gas pipeline network.

[0021] 2. A large-flow water supply valve and a small-flow bypass valve are set in the water supply system, and a large-flow drain valve and a small-flow bypass valve are set in the drainage system; a liquid level gauge with a communication function is used to achieve precise adjustment of the water seal height.

[0022] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present utility model and combines with the drawings to describe in detail as follows. The specific implementation manners of the present utility model are given in detail by the following embodiments and their drawings. Description of the Drawings

[0023] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0024] Figure 1 It is a schematic diagram of the device structure of the embodiment provided by the present utility model;

[0025] In the figure, 1 is a water seal tank; 2 is a gas inlet pipe; 3 is a gas outlet; 4 is accumulated water; 6 is a liquid level gauge; 7 is a water supply system; 7-1 is a water supply pipeline; 7-2 is a water supply valve; 7-3 is a check valve; 7-4 is a U-shaped water seal pipeline; 8 is a drainage system; 8-1 is a water pipeline; 8-2 is a drain valve; 9 is a bypass branch; 9-1 is a through pipeline; 9-2 is a bypass valve; 10 is an arc partition; 11 is an inspection opening; 12 is a pressure gauge; 13 is a bimetallic thermometer; 14 is a cut-off valve; H is the water seal height. Specific embodiments

[0026] The following is combined with the attached Figure 1 The principles and features of the present invention will be described. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. According to the following description and the claims, the advantages and features of the present invention will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0027] It should be noted that when a component is referred to as "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0029] Referring to Figure 1 As shown, the present invention provides a zero-leakage air-backflow-preventing steplessly adjustable gas relief device.

[0030] Embodiment 1

[0031] It includes a sealed water seal tank 1; a gas inlet pipe 2 and a gas outlet 3 are provided inside the water seal tank, and the gas outlet is located at the top of the water seal tank; there is a set height of accumulated water 4 in the water seal tank, the gas inlet pipe passes through the tank wall of the water seal tank and is placed in the accumulated water, and the height difference between the water surface of the accumulated water and the pipe orifice of the gas inlet pipe is the water seal height H; the gas enters from the gas inlet pipe, and after the gas pressure at the pipe orifice of the gas inlet pipe exceeds the relief pressure formed by the water pressure height, it enters the water seal tank and is sent to the flare for relief through the gas outlet at the top of the water seal tank.

[0032] In this embodiment, the gas inlet pipe is inserted into the water in the water seal tank. Since the height of the accumulated water is greater than the height of the pipe orifice of the gas inlet pipe, the accumulated water enters to the pipe orifice of the gas pipe, forming a water seal; the released gas enters the water seal tank through the gas inlet pipe. When the gas pressure is sufficient to break through the water seal, it can pass through the water seal, be discharged through the gas outlet, and enter the flare for ignition and relief. When the gas pressure is insufficient, it is isolated inside the pipe orifice of the gas inlet pipe by the water. The determination of the water seal height is related to the gas relief pressure. Assuming the gas relief pressure is 8 kPa, the water seal height can be set to 790 mm. The pressure formed by the water seal height is slightly lower than the gas relief pressure. Then, when the gas pressure passing through the relief regulating valve is 8 kPa, it can smoothly break through the water seal and be discharged into the flare for relief. When the gas pressure is less than 8 kPa, the opening of the external regulating valve is adjusted to the minimum. Some internally leaked gas enters the water seal tank, but because the pressure is not enough to break through the water seal, it is isolated inside the inlet pipe, thus realizing zero leakage of gas relief. In addition, when the external gas pipeline system has a negative pressure due to an accident, the water in the water seal tank flows back into the gas inlet pipe, ensuring that the end of the inlet pipe is always below the water surface, thereby preventing air from flowing back and ensuring the safety of the gas pipeline network.

[0033] Embodiment 2

[0034] The structure and principle of Embodiment 2 are similar to those of Embodiment 1. The difference lies in: a structural form of the gas inlet pipe is given. The gas inlet pipe at least includes a first section and a second section. The first section is disposed through the tank wall of the water seal tank, connecting the inner cavity of the water seal tank and the gas transmission pipeline; the top end of the second section is connected to the end of the first section located inside the water seal tank, and the bottom end of the second section is placed in the accumulated water of the water seal tank; the vertical length of the second section is greater than the set maximum water seal height.

[0035] Preferably, the first section is horizontally arranged and the second section is vertically arranged.

[0036] Embodiment 3

[0037] The structure and principle of Example 3 are similar to those of Example 1 or 2. The difference lies in that in order to timely adjust the liquid level height in the water seal tank, a liquid level gauge 6, a water supply system 7, and a drainage system 8 are also provided in the water seal tank. One end of the water supply system is connected to an external water source, and the other end is connected to the side wall of the water seal tank. The connection port is higher than the highest height of the set accumulated water. One end of the drainage system is connected to the bottom of the water seal tank, and the other end is connected to an external discharge pipeline. The liquid level gauge is arranged in the water seal tank to display the water seal height.

[0038] Example 4

[0039] The structure and principle of Example 4 are similar to those of Example 3. The difference lies in that a preferred structural form of the water supply system and the drainage system is given.

[0040] The water supply system includes a water supply pipeline 7-1, a water supply valve 7-2 and a check valve 7-3 provided on the water supply pipeline, and a U-shaped water seal pipeline 7-4 connected between the water supply pipeline and the water seal tank. One end of the water supply pipeline is connected to an external water source, and the check valve is arranged between the water supply valve and the U-shaped water seal pipeline.

[0041] The drainage system includes a drainage pipeline 8-1 and a drainage valve 8-2 provided on the drainage pipeline. One end of the drainage pipeline is connected to the bottom of the water storage cavity of the water seal tank, and the other end is connected to an external drainage pipeline.

[0042] Example 5

[0043] The structure and principle of Example 5 are similar to those of Example 4. The difference lies in that bypass branches 9 are also provided in both the water supply system and the drainage system. The bypass branch includes a bypass pipeline 9-1 and a bypass valve 9-2 provided on the bypass pipeline. Both ends of the bypass pipeline are respectively connected to both ends of the water supply valve or the drainage valve. One of the connection ports of the bypass branch is arranged between the water supply valve and the check valve. In order to facilitate the maintenance of the water supply valve or the drainage valve, a cut-off valve 14 is respectively provided on the water supply pipeline at both ends of the water supply valve or on the drainage valve pipeline at both ends of the drainage valve. The cut-off valve is located between the water supply valve and the bypass pipeline interface or between the drainage valve and the bypass pipeline interface. In this embodiment, the water supply valve and the drainage valve are used to regulate the water flow of large flow rates, and the bypass valve of the bypass branch is used to regulate the water flow of small flow rates.

[0044] When the liquid level gauge adopts a liquid level gauge with communication function, the bypass valve, the water supply valve and the drainage valve all adopt solenoid valves, and the four are electrically connected. The opening and closing of the bypass valve, the water supply valve and the drainage valve are controlled by the liquid level gauge.

[0045] Under normal circumstances in the water supply system, the check valve is normally open and the water supply valve is closed; when the liquid level gauge detects that the water level in the tank has not reached the set liquid level, the inlet water supply valve is opened and water flows into the tank; when the water approaches the liquid level, the water supply valve is closed and the bypass valve connected in parallel with the water supply valve is opened for small-flow water supply to achieve precise control of the liquid level height; finally, when the set liquid level is reached, the bypass valve is closed.

[0046] Under normal circumstances in the drainage system, the check valve is normally open and the drain valve is closed; when the liquid level gauge detects that the water level in the tank far exceeds the set liquid level, or when water needs to be changed or drained, the drain valve is opened and water is discharged from the bottom; when the water level drops to near the liquid level, the bypass valve connected in parallel with the drain valve is opened for small-flow water supply to achieve precise control of the liquid level height; finally, when the set liquid level is reached, the bypass valve is closed.

[0047] Among them, preferably, when the liquid level gauge adopts a liquid level gauge with communication function, the bypass valve, the water supply valve and the drain valve are all solenoid valves, and the four are electrically connected, and the opening and closing of the bypass valve, the water supply valve and the drain valve are controlled by the liquid level gauge.

[0048] In Embodiments 1-5, preferably, in order to facilitate the drainage of accumulated water in the water seal tank, the water seal tank is divided into upper and lower layers, and an arc-shaped partition 10 is provided between the two layers. The area above the arc-shaped partition is used as the accumulated water storage cavity, and the area below the arc-shaped partition is used as the installation area of the drainage system. The connection port of the drainage system and the water seal tank is arranged at the lowest point of the arc-shaped partition.

[0049] In addition, in order to facilitate the maintenance operation of the upper and lower layer spaces of the water seal tank, maintenance openings 11 are provided on the tank walls in the areas above and below the arc-shaped partition.

[0050] In Embodiments 1-5, a pressure gauge 12 is provided on the bin wall of the water seal tank to detect the gas pressure in the water seal tank; the height of the pressure gauge is greater than the height of the accumulated water liquid level corresponding to the maximum water seal height.

[0051] In Embodiments 1-5, a bimetallic thermometer 13 is also provided on the side wall of the water seal tank, and the height of the bimetallic thermometer is greater than the height of the accumulated water liquid level corresponding to the maximum water seal height.

[0052] The above is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention according to the instructions in the attached drawings and the above description; however, any equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above for some modifications, decorations and evolutions are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. Zero-leakage air-backflow prevention steplessly adjustable gas blow-off device, characterized in that: It includes a sealed water seal tank; a gas inlet pipe and a gas outlet are provided in the water seal tank, and the gas outlet is located at the top of the water seal tank; there is accumulated water with a set height in the water seal tank, the gas inlet pipe passes through the tank wall of the water seal tank and is placed in the accumulated water, and the height difference between the water surface of the accumulated water and the pipe orifice of the gas inlet pipe is the water seal height; the gas enters from the gas inlet pipe, and after the gas pressure at the pipe orifice of the gas inlet pipe exceeds the relief pressure formed by the water pressure height, it enters the water seal tank and is sent to the flare for relief through the gas outlet at the top of the water seal tank.

2. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 1, characterized in that: The gas inlet pipe at least includes a first section and a second section. The first section penetrates and is provided on the tank wall of the water seal tank, connecting the inner cavity of the water seal tank and the gas transmission pipeline; the top end of the second section is connected to the end of the first section located in the inner cavity of the water seal tank, and the bottom end of the second section is placed in the accumulated water of the water seal tank; the vertical length of the second section is greater than the set maximum water seal height.

3. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 2, wherein: The first section is horizontally arranged, and the second section is vertically arranged.

4. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to any one of claims 1 to 3, characterized in that: A liquid level gauge, a water supply system and a drainage system are also provided in the water seal tank. One end of the water supply system is connected to an external water source, and the other end of the water supply system is connected to the side wall of the water seal tank, and the connection port is higher than the highest height of the set accumulated water; one end of the drainage system is connected to the bottom of the water seal tank, and the other end of the drainage system is connected to an external drainage pipeline; the liquid level gauge is arranged in the water seal tank and is used to display the water seal height.

5. The zero-leakage anti-air backflow stepless adjustment gas relief device according to claim 1, characterized in that: The water supply system includes a water supply pipeline, a water supply valve and a check valve provided on the water supply pipeline, and a U-shaped water seal pipeline connected between the water supply pipeline and the water seal tank; one end of the water supply pipeline is connected to an external water source, and the check valve is arranged between the water supply valve and the U-shaped water seal pipeline; The drainage system includes a drainage pipeline and a drainage valve provided on the drainage pipeline. One end of the drainage pipeline is connected to the bottom of the water storage cavity of the water seal tank, and the other end is connected to an external drainage pipeline.

6. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 5, wherein: Bypass branches are also provided in both the water supply system and the drainage system. The bypass branch includes a bypass pipeline and a bypass valve provided on the bypass pipeline. The two ends of the bypass pipeline are respectively connected to both ends of the water supply valve or the drainage valve, and one of the connection ports of the bypass branch is arranged between the water supply valve and the check valve; a cut-off valve is respectively provided on the water supply pipeline at both ends of the water supply valve or on the drainage valve pipeline at both ends of the drainage valve. The cut-off valve is located between the water supply valve and the bypass pipeline interface or between the drainage valve and the bypass pipeline interface; When the liquid level gauge adopts a liquid level gauge with communication function, the bypass valve, the water supply valve and the drainage valve all adopt solenoid valves, and the four are electrically connected, and the opening and closing of the bypass valve, the water supply valve and the drainage valve are controlled by the liquid level gauge.

7. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 4, characterized in that: The water seal tank is divided into upper and lower layers, and there is an arc-shaped partition between the two layers. The area above the arc-shaped partition is used as the accumulated water storage cavity, and the area below the arc-shaped partition is used as the installation area of the drainage system. The connection port of the drainage system and the water seal tank is arranged at the lowest point of the arc-shaped partition.

8. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 7, characterized in that: Maintenance openings are provided on the tank walls in the areas above and below the arc-shaped partition.

9. The zero-leakage air-backflow prevention steplessly adjustable gas blow-off device according to claim 1, wherein: A pressure gauge is provided on the bin wall of the water seal tank; the height of the pressure gauge is greater than the height of the accumulated water surface corresponding to the maximum water seal height.

10. The zero-leakage and air-backflow-preventing steplessly adjustable gas blow-off device according to claim 1, characterized in that: A bimetallic thermometer is also provided on the side wall of the water seal tank, and the height of the bimetallic thermometer is greater than the height of the accumulated water surface corresponding to the maximum water seal height.

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