Drainage system of high-pressure gas storage tank

Abstract

The utility model relates to a drainage system of a high-pressure gas storage tank and belongs to the field of high-pressure gas storage tanks. Comprising a drain valve group, a liquid level meter, a pressure gauge and a pressure relief and pressure maintaining dual-purpose tank, the pressure relief and pressure maintaining dual-purpose tank is arranged, so that the problem of pipeline vibration during water drainage of the high-pressure gas storage tank is reduced or even eliminated, and the durability of the valve is improved; and the pressure relief and pressure maintaining dual-purpose tank also serves as a drainage buffer, so that the problem that the high-pressure gas tank cannot maintain the pressure when the valve is stuck or damaged is solved, and the operation stability of equipment needing the high-pressure gas tank, such as an air compressor, is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of high-pressure gas holder drainage systems, belong to high-pressure gas holder field. BACKGROUND

[0002] High-pressure gas holder is a kind of equipment commonly used in chemical industry, pharmaceutical production field etc.. In production activities, high-pressure gas contains moisture in varying degrees, moisture liquefaction is accumulated in the bottom of gas holder, more and more over time, can affect the use and safe operation of gas holder, so regular drainage is common operation in the use of gas holder. High-pressure gas holder because its storage gas is mostly high-pressure gas, kinetic energy is greater in the process of drainage, drainage pipeline trembles, valve durability drops etc. are common problems.

[0003] And high-pressure initial tank is often used in air compressor etc. compressor, air compressor gas holder drainage uses traditional manual mechanical valve as drainage system, foreign matter is easily stuck in valve core and forms always open, so that air compressor pressure is insufficient, cannot reach pressure set value, air compressor works all the time, causes great waste to electric power. SUMMARY

[0004] According to the problem described in background, the problem to be solved by the utility model is:

[0005] How to slow down the high-pressure gas holder drainage pipeline trembles and the problem that pressure is unloaded after drainage valve is stuck.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of high-pressure gas holder drainage system, including drainage valve group, liquid level meter, pressure gauge and pressure relief and pressure maintaining dual-purpose tank;High-pressure gas holder bottom is connected by drainage pipeline pressure relief and pressure maintaining dual-purpose tank, the pressure relief and pressure maintaining dual-purpose tank is located below high-pressure gas holder;Drainage valve group is equipped on the drainage pipeline, the side surface of the bottom of high-pressure gas holder is equipped with liquid level meter and pressure gauge, the top of high-pressure gas holder is equipped with exhaust line;The bottom of the pressure relief and pressure maintaining dual-purpose tank is equipped with secondary drainage line, secondary drainage valve is equipped on the secondary drainage line, the tank body of the pressure relief and pressure maintaining dual-purpose tank is equipped with pressure gauge, one four-way is equipped above the pressure relief and pressure maintaining dual-purpose tank, and four passages thereof are connected exhaust line, drainage pipeline, the top of pressure relief and pressure maintaining dual-purpose tank and pressure relief line respectively;Pressure relief line is equipped with pressure relief valve, the four-way is connected exhaust line by equalizing line, the equalizing line is equipped with equalizing valve, the four-way is connected before drainage valve group of drainage pipeline, and is equipped with cross line valve.

[0008] Preferably, the drainage valve group has front protection valve, control valve and rear protection valve, and is sequentially arranged on the drainage pipeline;The control valve is electrically connected with liquid level meter.

[0009] Preferably, the pressure gauge is connected with DCS control system.

[0010] When the high-pressure gas tank needs to drain, open the equalizing valve, and the high-pressure gas tank and the pressure relief and pressure maintaining dual-purpose tank are equalized, and in actual production, it is not necessary to completely equalize, but only to reduce the pressure difference to prevent vibration. After equalization is completed, the equalizing valve is closed, the control valve on the drain line is opened, the water is drained to the pressure relief and pressure maintaining tank, and the control valve is closed. The pressure relief line is opened, the pressure in the pressure relief and pressure maintaining dual-purpose tank is discharged, and then the secondary drain valve is opened to complete the drainage, and finally the pressure relief valve and the secondary drain valve are closed.

[0011] When the control valve is blocked, the normally open front protection valve and the rear protection valve are closed, and the cross line valve is opened, at this time the high-pressure gas tank is communicated with the pressure relief and pressure maintaining dual-purpose tank, and the pressure relief and pressure maintaining dual-purpose tank acts as pressure maintaining. At this time, the control valve can be removed for maintenance and replacement, after replacement, the front and rear protection valves are opened, the cross line valve is closed, and the normal state is returned.

[0012] The beneficial effects of the utility model are:

[0013] The utility model discloses a pressure relief and pressure maintaining dual-purpose tank is arranged, reduces even eliminates the pipeline vibration problem when the high-pressure gas tank drains, improves the durability of the valve, and the pressure relief and pressure maintaining dual-purpose tank also acts as a drainage buffer, solves the problem that the high-pressure gas tank cannot maintain pressure when the valve is jammed or damaged, and improves the operation stability of the air compressor and other equipment requiring high-pressure gas tanks. DRAWINGS

[0014] Figure 1 It is the process schematic drawing of the utility model

[0015] In the drawing: 1 is a high-pressure gas tank;2 is a pressure relief and pressure maintaining dual-purpose tank;11 is a drain line;111 is a front protection valve;112 is a control valve;113 is a rear protection valve;12 is a liquid level meter;13 is an exhaust line;21 is a secondary drain line;211 is a secondary drain valve;22 is a pressure relief line;221 is a pressure relief valve;23 is an equalizing line;231 is an equalizing valve;141 is a cross line valve. DETAILED DESCRIPTION

[0016] Example 1

[0017] A kind of high-pressure gas tank drainage system, including drainage valve group, liquid level meter 12, pressure gauge and pressure relief and pressure maintaining dual-purpose tank 2;High-pressure gas tank 1 bottom is connected pressure relief and pressure maintaining dual-purpose tank 2 by drainage pipeline 11, the pressure relief and pressure maintaining dual-purpose tank 2 is located below high-pressure gas tank 1;Drainage pipeline 11 is equipped with drainage valve group, the bottom side of high-pressure gas tank 1 is equipped with liquid level meter 12 and pressure gauge, the top of high-pressure gas tank 1 is equipped with exhaust line 13;The bottom of pressure relief and pressure maintaining dual-purpose tank 2 is equipped with secondary drainage line 21, secondary drainage line 21 is equipped with secondary drainage valve 211, the tank body of pressure relief and pressure maintaining dual-purpose tank 2 is equipped with pressure gauge, the top of pressure relief and pressure maintaining dual-purpose tank 2 is equipped with a four-way, four passages thereof are connected exhaust line 13, drainage pipeline 11, pressure relief and pressure maintaining dual-purpose tank 2 top and pressure relief line 22 respectively;Pressure relief line 22 is equipped with pressure relief valve 221, the four-way is connected exhaust line 13 by equalizing line 23, equalizing line 23 is equipped with equalizing valve 231, the four-way is connected before the drainage valve group of drainage pipeline 11, and is equipped with cross line valve 141.

[0018] The drainage valve group has front protection valve 111, control valve 112 and rear protection valve 113, and is sequentially arranged on drainage pipeline 11;The control valve 112 is electrically connected to liquid level meter 12.

[0019] The pressure gauge is connected to DCS control system.

[0020] The utility model discloses a pressure relief and pressure maintaining dual-purpose tank 2 is set, reduces even eliminates the problem of pipeline tremor when high-pressure gas tank 1 drains, improves the durability of valve;Pressure relief and pressure maintaining dual-purpose tank 2 also serves as drainage buffer, solves the problem that high-pressure gas tank 1 cannot maintain pressure when valve is jammed or damaged, improves the operation stability of air compressor and the like high-pressure gas tank equipment.

Claims

1. A high pressure gas holder drain system comprising a drain valve group, a liquid level meter (12) and a pressure gauge, characterized in that, The utility model also includes a pressure relief and pressure maintaining dual-purpose tank (2); a high-pressure gas tank (1) is connected with the pressure relief and pressure maintaining dual-purpose tank (2) through a drain pipeline (11), and the pressure relief and pressure maintaining dual-purpose tank (2) is arranged below the high-pressure gas tank (1); a drain valve group is arranged on the drain pipeline (11); a liquid level meter (12) and a pressure gauge are arranged on the side of the bottom of the high-pressure gas tank (1); an exhaust line (13) is arranged on the top of the high-pressure gas tank (1); a secondary drain line (21) is arranged on the bottom of the pressure relief and pressure maintaining dual-purpose tank (2); a secondary drain valve (211) is arranged on the secondary drain line (21); a pressure gauge is arranged on the tank body of the pressure relief and pressure maintaining dual-purpose tank (2); a four-way joint is arranged above the pressure relief and pressure maintaining dual-purpose tank (2), and four passages of the four-way joint are respectively connected with the exhaust line (13), the drain pipeline (11), the top of the pressure relief and pressure maintaining dual-purpose tank (2) and a pressure relief line (22); a pressure relief valve (221) is arranged on the pressure relief line (22); the four-way joint is connected with the exhaust line (13) through an equalizing line (23); an equalizing valve (231) is arranged on the equalizing line (23); the four-way joint is arranged before the drain valve group of the drain pipeline (11) and is provided with a cross line valve (141).

2. The water drainage system of a high-pressure gas tank according to claim 1, wherein The drain valve group is composed of a front protection valve (111), a control valve (112) and a rear protection valve (113) and is sequentially arranged on the drain pipeline (11); the control valve (112) is electrically connected with the liquid level meter (12).

3. The water drainage system of a high-pressure gas tank according to claim 1, wherein The pressure gauge is connected with a DCS control system.

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