Nitrogen sealing device of tank field waste liquid storage tank

Abstract

The utility model relates to the technical field of nitrogen sealing of waste liquid storage tanks, in particular to a nitrogen sealing device of a tank field waste liquid storage tank, which comprises a class A waste liquid storage tank and a nitrogen conveying pipeline, the tail end of one side of the nitrogen conveying pipeline is communicated with a nitrogen main pipe, and pressure gauges are mounted at the front and rear positions of a self-standing differential pressure regulating valve. A one-way breather valve is mounted at the left part of the upper end of the class A waste liquid storage tank. Through cooperation of the class A waste liquid storage tank, the self-standing differential pressure regulating valve and the one-way breather valve, when liquid in the class A waste liquid storage tank is increased, the pressure of nitrogen in the storage tank is increased, the self-standing differential pressure regulating valve is closed, and redundant nitrogen is discharged into the atmosphere through the one-way breather valve; compared with the prior art, the device has the following advantages: 1, nitrogen in the waste liquid storage tank can be automatically and quickly supplemented or discharged, and the continuity of waste liquid feeding and discharging is realized; waste liquid in the tank is isolated from being in direct contact with air, the combustion heat release condition of the waste liquid in the tank is removed, and the storage safety of the waste liquid is improved;

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen sealing of waste liquid storage tanks, in particular to a nitrogen sealing device for waste liquid storage tanks in a tank area. Background Art

[0002] Waste liquid from the hazardous waste disposal process is stored in waste liquid storage tanks. Before the modification, a fire-retardant breathing valve is installed on the top of the tank to balance the pressure inside and outside the tank. This type of fire-retardant breathing valve can both add air to the tank when liquid is discharged from the tank and discharge gas from the tank when liquid is filled into the tank. Because the fire-retardant breathing valve is connected to the atmosphere, the air is in contact with the waste liquid in the tank. The mixture of air and waste liquid poses a risk of fire and combustion, which can easily cause an explosion. Utility Model Content

[0003] The utility model aims to solve the problem that, because the fire-blocking breathing valve is connected to the atmosphere, the air in contact with the waste liquid in the tank, the mixture of air and waste liquid has the risk of catching fire and burning, and is likely to cause explosion, and a nitrogen sealing device for waste liquid storage tanks in a tank area is proposed.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A nitrogen sealing device for a waste liquid storage tank in a tank area is designed, comprising a Class A waste liquid storage tank and a nitrogen delivery pipeline, wherein one end of the nitrogen delivery pipeline is connected to a nitrogen main pipe, a self-supporting pressure differential regulating valve is installed on the outer wall of the nitrogen delivery pipeline, pressure gauges are installed at the front and rear positions of the self-supporting pressure differential regulating valve, and a one-way breathing valve is installed at the upper left part of the Class A waste liquid storage tank.

[0006] Preferably, the other end of the nitrogen delivery pipeline is connected to the Class A waste liquid storage tank.

[0007] Preferably, a manual shut-off valve is installed on the outer wall of the nitrogen delivery pipeline, and the manual shut-off valve is located at the front side of the air inlet portion of the self-supporting differential pressure regulating valve.

[0008] Preferably, the one-way breathing valve limits the airflow direction so that it can only exhaust from the inside of the Class A waste liquid storage tank to the outside.

[0009] Preferably, the self-supporting differential pressure regulating valve can automatically adjust the nitrogen pressure in the Class A waste liquid storage tank.

[0010] The utility model provides a nitrogen sealing device for a waste liquid storage tank in a tank area, which has the following beneficial effects:

[0011] Through the coordination among the Class A waste liquid storage tank, the self-supporting pressure differential regulating valve, the one-way breathing valve, the pressure gauge and the nitrogen delivery pipeline, the self-supporting pressure differential regulating valve can be used to automatically adjust the stability of the nitrogen pressure in the Class A waste liquid storage tank. When the liquid in the Class A waste liquid storage tank decreases, the nitrogen pressure in the storage tank decreases, and the self-supporting pressure differential regulating valve automatically opens to replenish nitrogen in the storage tank. When the liquid in the Class A waste liquid storage tank increases, the nitrogen pressure in the storage tank increases, the self-supporting pressure differential regulating valve closes, and the excess nitrogen is discharged into the atmosphere through the one-way breathing valve. The device can realize that the liquid-free area inside the Class A waste liquid storage tank is filled with nitrogen. Compared with the prior art, this case has the following advantages: 1. It can automatically and quickly replenish or discharge the nitrogen in the waste liquid storage tank to achieve the continuity of the waste liquid in and out; 2. It isolates the waste liquid in the tank from direct contact with the air, removes the combustion and heat release conditions of the waste liquid in the tank, and increases the safety of waste liquid storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1. Class A waste liquid storage tank, 2. Nitrogen main pipe, 3. Nitrogen delivery pipeline, 4. Pressure gauge, 5. Manual shut-off valve, 6. Self-supporting differential pressure regulating valve, 7. One-way breathing valve. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Embodiment 1:

[0016] See attached Figure 1 In the present embodiment, a nitrogen sealing device for a waste liquid storage tank in a tank area comprises a Class A waste liquid storage tank 1 and a nitrogen delivery pipe 3, one end of the nitrogen delivery pipe 3 is connected to a nitrogen main pipe 2, a self-supporting pressure differential regulating valve 6 is installed on the outer wall of the nitrogen delivery pipe 3, pressure gauges 4 are installed at the front and rear positions of the self-supporting pressure differential regulating valve 6, a one-way breathing valve 7 is installed on the left upper end of the Class A waste liquid storage tank 1, the other end of the nitrogen delivery pipe 3 is connected to the Class A waste liquid storage tank 1, a manual shut-off valve 5 is installed on the outer wall of the nitrogen delivery pipe 3, the manual shut-off valve 5 is located on the front side of the air inlet of the self-supporting pressure differential regulating valve 6, the one-way breathing valve 7 limits the airflow direction to exhaust only from the inside of the Class A waste liquid storage tank 1 to the outside, and the self-supporting pressure differential regulating valve 6 can automatically adjust the nitrogen pressure in the Class A waste liquid storage tank 1.

[0017] The device can fill the liquid-free area inside the Class A waste liquid storage tank 1 with nitrogen, which can isolate the air from contacting the waste liquid in the tank, thereby increasing the storage safety of the waste liquid;

[0018] The self-supporting differential pressure regulating valve 6 can automatically adjust the stability of the nitrogen pressure in the Class A waste liquid storage tank 1. When the liquid in the Class A waste liquid storage tank 1 decreases, the nitrogen pressure in the storage tank decreases, and the self-supporting differential pressure regulating valve 6 automatically opens to replenish nitrogen in the storage tank. When the liquid in the Class A waste liquid storage tank 1 increases, the nitrogen pressure in the storage tank increases, and the self-supporting differential pressure regulating valve 6 closes and discharges excess nitrogen into the atmosphere through the one-way breathing valve 7;

[0019] A pressure gauge 4 is provided before and after the self-supporting differential pressure regulating valve 6, and the data displayed on the pressure gauge 4 can be used to determine whether the self-supporting differential pressure regulating valve 6 is working normally;

[0020] The manual shut-off valve 5 in front of the self-supporting differential pressure regulating valve 6 can be used to control the flow rate of nitrogen and manually replenish nitrogen.

[0021] Through the coordination among the Class A waste liquid storage tank 1, the self-supporting pressure differential regulating valve 6, the one-way breathing valve 7, the pressure gauge 3 and the nitrogen delivery pipeline 3, the self-supporting pressure differential regulating valve 6 can be used to automatically adjust the stability of the nitrogen pressure in the Class A waste liquid storage tank 1. When the liquid in the Class A waste liquid storage tank 1 decreases, the nitrogen pressure in the storage tank decreases, and the self-supporting pressure differential regulating valve 6 automatically opens to replenish nitrogen in the storage tank. When the liquid in the Class A waste liquid storage tank 1 increases, the nitrogen pressure in the storage tank increases, the self-supporting pressure differential regulating valve 6 closes, and discharges excess nitrogen into the atmosphere through the one-way breathing valve 7. The device can realize that the liquid-free area inside the Class A waste liquid storage tank 1 is filled with nitrogen. Compared with the prior art, this case has the following advantages: 1. It can automatically and quickly replenish or discharge the nitrogen in the waste liquid storage tank to achieve the continuity of the inlet and outlet of the waste liquid; 2. It isolates the waste liquid in the tank from direct contact with the air, removes the combustion and heat release conditions of the waste liquid in the tank, and increases the safety of waste liquid storage.

[0022] Working principle:

[0023] When the nitrogen sealing device of the waste liquid storage tank in this tank area is needed, first assemble and connect the overall structure as shown in the figure, and then use the self-supporting pressure difference regulating valve 6 to automatically adjust the stability of the nitrogen pressure in the Class A waste liquid storage tank 1. When the liquid in the Class A waste liquid storage tank 1 decreases, the nitrogen pressure in the storage tank decreases, and the self-supporting pressure difference regulating valve 6 automatically opens to replenish nitrogen in the storage tank. When the liquid in the Class A waste liquid storage tank 1 increases, the nitrogen pressure in the storage tank increases, the self-supporting pressure difference regulating valve 6 closes, and discharges excess nitrogen into the atmosphere through the one-way breathing valve 7. The device can achieve that the liquid-free area inside the Class A waste liquid storage tank 1 is filled with nitrogen, and can isolate the air from contact with the waste liquid in the tank, thereby increasing the storage safety of the waste liquid. In addition, when in use, the self-supporting pressure difference regulating valve 6 can be judged whether it is working normally according to the data displayed on the pressure gauge 4, and the manual shut-off valve 5 can be used to control the flow of nitrogen and manually replenish nitrogen.

[0024] The nitrogen sealing device of the waste liquid storage tank in this tank area adopts a one-way breathing valve. The nitrogen in the tank can be discharged automatically, and the air outside the tank cannot enter the waste liquid storage tank, isolating the air from contacting the waste liquid and increasing the safety of storing waste liquid in the waste liquid storage tank.

[0025] The nitrogen sealing device of the waste liquid storage tank in the tank area adopts a self-supporting pressure difference regulating valve 6, which can automatically replenish the nitrogen in the tank area to stabilize the nitrogen pressure in the tank, so that the nitrogen pressure in the tank is stabilized at a set value.

[0026] Compared with the prior art, this case has the following advantages after adding a nitrogen sealing device to the waste liquid storage tank in the tank area:

[0027] 1. It can automatically and quickly replenish or discharge nitrogen in the waste liquid storage tank to achieve continuity in and out of waste liquid;

[0028] 2. Isolate the waste liquid in the tank from direct contact with the air, remove the combustion and heat release conditions of the waste liquid in the tank, and increase the safety of waste liquid storage.

[0029] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A nitrogen sealing device for a waste liquid storage tank in a tank area, comprising a Class A waste liquid storage tank (1) and a nitrogen delivery pipeline (3), characterized in that: One end of the nitrogen delivery pipeline (3) is connected to the nitrogen main pipeline (2), a self-supporting differential pressure regulating valve (6) is installed on the outer wall of the nitrogen delivery pipeline (3), pressure gauges (4) are installed at the front and rear positions of the self-supporting differential pressure regulating valve (6), and a one-way breathing valve (7) is installed at the left upper end of the Class A waste liquid storage tank (1).

2. The nitrogen sealing device for a waste liquid storage tank in a tank area according to claim 1 is characterized in that: The other end of the nitrogen delivery pipeline (3) is connected to the Class A waste liquid storage tank (1).

3. The nitrogen sealing device for a waste liquid storage tank in a tank area according to claim 1 is characterized in that: A manual shut-off valve (5) is installed on the outer wall of the nitrogen delivery pipeline (3), and the manual shut-off valve (5) is located in front of the air inlet of the self-supporting differential pressure regulating valve (6).

4. The nitrogen sealing device for a waste liquid storage tank in a tank area according to claim 1 is characterized in that: The one-way breathing valve (7) limits the airflow direction so that it can only be exhausted from the inside of the Class A waste liquid storage tank (1) to the outside.

5. The nitrogen sealing device for a waste liquid storage tank in a tank area according to claim 1 is characterized in that: The self-supporting differential pressure regulating valve (6) can automatically adjust the nitrogen pressure in the Class A waste liquid storage tank (1).

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