Pressure stabilizing tank gas supplementing mechanism of VOCS (Volatile Organic Compounds) recovery device

Abstract

The utility model relates to the technical field of surge tanks, in particular to a surge tank air supply mechanism of a VOCS (volatile organic compounds) recovery device, which comprises an air supply structure, one end of the air supply structure is connected with a surge tank, and the other end of the air supply structure is provided with an air exhaust pry; the air supply structure comprises an air supply bus and a first air supply branch, the air supply bus is connected to the surge tank, one end of the first air supply branch is connected to the air supply bus, the other end of the first air supply branch is provided with a first air supply inlet opposite to the air exhaust pry, and the first air supply branch is provided with a flow regulating valve. The utility model aims to quickly and stably adjust the internal pressure of the surge tank.

Description

Technical Field

[0001] This utility model relates to the field of pressure stabilizing tank technology, and in particular to a pressure stabilizing tank gas replenishment mechanism for a VOCs recovery device. Background Technology

[0002] An adjustable gas replenishment device for a pressure stabilizing tank is a device used to maintain a stable gas pressure, commonly found in industrial and fire protection systems. Its main function is to automatically replenish gas according to system needs, keeping the tank pressure within a set range. This is particularly important in oilfields where gas tanks constantly release volatile gases, requiring timely venting and collection to prevent exceeding the tank's pressure rating and causing safety accidents. The tank pressure should not be too low or too high. Too low a pressure accelerates gas evaporation and wastes gas, while too high a pressure poses a danger. While some technologies use multiple breather valves on the tank, these valves directly release VOCs, easily causing pollution and waste. Utility Model Content

[0003] The main purpose of this invention is to provide a gas replenishment mechanism for the pressure stabilizing tank of a VOCs recovery device, which aims to quickly and stably regulate the internal pressure of the pressure stabilizing tank.

[0004] To achieve the above objectives, this utility model proposes a pressure stabilizing tank gas replenishment mechanism for a VOCs recovery device, which includes a gas replenishment structure. One end of the gas replenishment structure is connected to a pressure stabilizing tank, and the other end is equipped with a suction skid.

[0005] The air replenishment structure includes an air replenishment bus and a first air replenishment branch. The air replenishment bus is connected to the pressure stabilizing tank. One end of the first air replenishment branch is connected to the air replenishment bus, and the other end is provided with a first air replenishment inlet relative to the air extraction skid. A flow regulating valve is provided on the first air replenishment branch.

[0006] In one embodiment of this application, the flow regulating valve is connected to the end of the first air supply branch away from the air extraction skid, and the first air supply branch is provided with a pressure reducing valve and a flow meter in sequence along the direction away from the flow regulating valve.

[0007] In one embodiment of this application, a first shut-off ball valve is provided in the first replenishment air inlet facing the flow meter, and a second shut-off ball valve is provided in the first replenishment air branch away from the first replenishment air inlet. The second shut-off ball valve is connected to the flow regulating valve on the side away from the pressure reducing valve.

[0008] In one embodiment of this application, the first air supply branch is provided with a second air supply branch relative to the air supply bus. One end of the second air supply branch is connected to the air supply bus, and the other end is connected to the first air supply branch, and is located between the first shut-off ball valve and the first air supply inlet.

[0009] A bypass ball valve is provided on the second air supply branch.

[0010] In one embodiment of this application, the gas replenishment bus is provided with a third gas replenishment branch relative to the first gas replenishment branch. The third gas replenishment branch is a fuel gas replenishment pipeline, and a second gas replenishment inlet is provided at the end of the third gas replenishment branch away from the gas replenishment bus.

[0011] The third air supply branch is connected in parallel with the air supply main branch to the fourth air supply branch, and the fourth air supply branch is connected to the second air supply inlet.

[0012] By adopting the above technical solution, this utility model has the following advantages:

[0013] 1. By using a gas replenishment structure to connect the pressure stabilizing tank and the gas extraction skid, when the pressure stabilizing tank is overpressurized, the gas extraction skid can reduce the pressure of the pressure stabilizing tank through the gas replenishment structure, thus protecting the pressure stabilizing tank. At the same time, the gas extraction skid can store excess gas when the pressure stabilizing tank is overpressurized, and when gas needs to be replenished to the pressure stabilizing tank, the gas replenishment structure can directly transport the gas in the gas extraction skid back to the pressure stabilizing tank. Through the above structure, the internal pressure of the pressure stabilizing tank can be quickly and stably adjusted, and gas overflow and pollution can be avoided.

[0014] 2. The gas replenishment structure itself includes a gas replenishment bus and a first gas replenishment branch. The gas replenishment bus is connected to the pressure stabilizing tank, and the first gas replenishment branch is connected to the extraction skid. Through the gas replenishment bus, the gas replenishment structure can be set with multiple gas replenishment branches. Using multiple gas replenishment branches can improve gas replenishment efficiency, and when one gas replenishment branch is damaged or requires maintenance, the other gas replenishment branches can work alternately to ensure working efficiency. The first gas replenishment branch is connected to the extraction skid and is equipped with a flow regulating valve. The flow regulating valve can detect the tank pressure of the pressure stabilizing tank and automatically adjust the gas replenishment amount according to the tank pressure using PID. Using the first gas replenishment branch can reduce gas pollution and at the same time automatically replenish gas to the pressure stabilizing tank, thus protecting the pressure stabilizing tank. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device of this utility model;

[0017] Figure 2 This is a schematic diagram of the gas replenishment structure of the pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device of this utility model.

[0018] Explanation of icon numbers:

[0019] 1. Air supply structure; 2. Air supply main line; 3. First air supply branch; 31. Second shut-off ball valve; 32. Flow regulating valve; 33. Pressure reducing valve; 34. Flow meter; 35. First shut-off ball valve; 36. First air supply inlet; 4. Second air supply branch; 41. Bypass ball valve; 5. Third air supply branch; 6. Fourth air supply branch.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] Reference Figures 1 to 2 To achieve the above objectives, this utility model proposes a pressure stabilizing tank gas replenishment mechanism for a VOCs recovery device, which includes a gas replenishment structure 1. One end of the gas replenishment structure 1 is connected to a pressure stabilizing tank, and the other end is provided with a suction skid.

[0023] The air replenishment structure 1 includes an air replenishment bus 2 and a first air replenishment branch 3. The air replenishment bus 2 is connected to the pressure stabilizing tank. One end of the first air replenishment branch 3 is connected to the air replenishment bus 2, and the other end is provided with a first air replenishment inlet 36 relative to the air extraction skid. A flow regulating valve 32 is provided on the first air replenishment branch 3.

[0024] By connecting the pressure stabilizing tank and the extraction skid using the gas replenishment structure 1, when the pressure stabilizing tank is overpressurized, the extraction skid can reduce the pressure of the pressure stabilizing tank through the gas replenishment structure 1, thus protecting the pressure stabilizing tank. At the same time, the extraction skid can store excess gas when the pressure stabilizing tank is overpressurized, and when it is necessary to replenish the pressure stabilizing tank with gas, the gas replenishment structure 1 can directly transport the gas in the extraction skid back to the pressure stabilizing tank. Through the above structure, the internal pressure of the pressure stabilizing tank can be quickly and stably adjusted, and gas overflow and pollution can be avoided.

[0025] The gas replenishment structure 1 itself includes a gas replenishment bus 2 and a first gas replenishment branch 3. The gas replenishment bus 2 is connected to the pressure stabilizing tank, and the first gas replenishment branch 3 is connected to the extraction skid. Through the gas replenishment bus 2, the gas replenishment structure 1 can be set with multiple gas replenishment branches. Using multiple gas replenishment branches can improve gas replenishment efficiency, and when one gas replenishment branch is damaged or needs maintenance, the other gas replenishment branches can work alternately to ensure working efficiency. The first gas replenishment branch 3 is connected to the extraction skid and is equipped with a flow regulating valve 32. The flow regulating valve 32 can detect the tank pressure of the pressure stabilizing tank and automatically adjust the gas replenishment amount according to the tank pressure using PID. Using the first gas replenishment branch 3 can reduce gas pollution and automatically replenish gas to the pressure stabilizing tank, thus protecting the pressure stabilizing tank.

[0026] See also Figure 2 The flow regulating valve 32 is connected to the end of the first air supply branch 3 away from the air extraction skid. The first air supply branch 3 is provided with a pressure reducing valve 33 and a flow meter 34 in sequence along the side away from the flow regulating valve 32.

[0027] The first gas supply branch 3 is connected to the gas supply main line 2 via a flow regulating valve 32. The flow regulating valve 32 is mainly used to regulate the flow rate and determine the amount of gas supplied. Since the pressure stabilizing tank is connected to the oilfield's atmospheric gas tank, and the gas inside is combustible, in order to ensure a more stable gas supply process, the first gas supply branch 3 is also equipped with a flow meter 34 and a pressure reducing valve 33. The flow meter 34 can display the real-time flow rate and the cumulative flow rate; the pressure reducing valve 33 controls the gas supply pressure entering the pressure stabilizing tank. Through the cooperation of the above instruments, high-speed entry of gas into the pressure stabilizing tank can be avoided, thus ensuring the safety of gas supply.

[0028] See also Figure 2 The first air supply inlet 36 is provided with a first shut-off ball valve 35 facing the flow meter 34, and the first air supply branch 3 is provided with a second shut-off ball valve 31 away from the first air supply inlet 36. The second shut-off ball valve 31 is connected to the flow regulating valve 32 on the side away from the pressure reducing valve 33.

[0029] Two shut-off ball valves are installed on both sides of the instrument on the first gas replenishment branch 3. A ball valve is installed at the inlet and outlet of the automatic gas replenishment pipeline for shut-off during maintenance, which can protect the gas replenishment mechanism and make the maintenance efficiency of the gas replenishment mechanism higher.

[0030] See also Figures 1 to 2 The first air supply branch 3 is provided with a second air supply branch 4 relative to the air supply bus 2. One end of the second air supply branch 4 is connected to the air supply bus 2, and the other end is connected to the first air supply branch 3, and is located between the first shut-off ball valve 35 and the first air supply inlet 36; a bypass ball valve 41 is provided on the second air supply branch 4.

[0031] The first gas replenishment branch 3 is provided with a second gas replenishment branch 4 relative to the gas replenishment main line 2. The first and second gas replenishment branches 4 are connected in parallel and together form the gas replenishment pipeline for the air extraction skid. Using this pipeline to connect the air extraction skid can avoid the gas from polluting the outside environment and can efficiently replenish the pressure tank. The second gas replenishment branch 4 is a manual gas replenishment branch. Users can forcibly start the gas replenishment operation through the bypass ball valve 41. When a large amount of gas needs to be replenished or emergency gas replenishment is required, the second gas replenishment branch 4 can be used to replenish gas, improving the user experience.

[0032] See also Figure 1 The gas supply bus 2 is provided with a third gas supply branch 5 relative to the first gas supply branch 3. The third gas supply branch 5 is a fuel gas supply pipeline. The end of the third gas supply branch 5 away from the gas supply bus 2 is provided with a second gas supply inlet.

[0033] The third air supply branch 5 is connected in parallel with the air supply main line 2 to the fourth air supply branch 6, which is connected to the second air supply inlet.

[0034] The third and fourth gas replenishment branches 5 and 6 are connected in parallel and to the main gas replenishment line 2. These branches are fuel gas replenishment lines used to connect to external gas pipes. They are activated in an emergency when the gas replenishment lines on the extraction skid cannot meet the replenishment needs of the pressure stabilizing tank, thus maintaining the safety of the pressure stabilizing tank and preventing accidents. Structurally, the third and fourth gas replenishment branches 5 and 6 are completely identical to the first and second gas replenishment branches 3 and 4, except for the connection structure of the second gas replenishment inlet and the first gas replenishment inlet 36. The second gas replenishment inlet is used to connect to an external gas pipe, providing rapid gas replenishment to meet the emergency replenishment needs of the pressure stabilizing tank. This structure allows for rapid and stable adjustment of the internal pressure of the pressure stabilizing tank while protecting the user, making the tank's operation more stable.

[0035] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0036] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressure stabilizing tank gas replenishment mechanism for a VOCs recovery device, comprising a gas replenishment structure, characterized in that, The air replenishment structure is connected to a pressure stabilizing tank at one end and an air extraction skid at the other end. The air replenishment structure includes an air replenishment bus and a first air replenishment branch. The air replenishment bus is connected to the pressure stabilizing tank. One end of the first air replenishment branch is connected to the air replenishment bus, and the other end is provided with a first air replenishment inlet relative to the air extraction skid. A flow regulating valve is provided on the first air replenishment branch.

2. The pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device according to claim 1, characterized in that, The flow regulating valve is connected to the end of the first air supply branch away from the air extraction skid. The first air supply branch is provided with a pressure reducing valve and a flow meter in sequence along the direction away from the flow regulating valve.

3. The pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device according to claim 2, characterized in that, The first air supply inlet is provided with a first shut-off ball valve facing the flow meter, and the first air supply branch is provided with a second shut-off ball valve away from the first air supply inlet. The second shut-off ball valve is connected to the flow regulating valve on the side away from the pressure reducing valve.

4. The pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device according to claim 3, characterized in that, The first air supply branch is provided with a second air supply branch relative to the air supply bus. One end of the second air supply branch is connected to the air supply bus, and the other end is connected to the first air supply branch, and it is located between the first shut-off ball valve and the first air supply inlet. A bypass ball valve is provided on the second air supply branch.

5. The pressure stabilizing tank gas replenishment mechanism of the VOCs recovery device according to claim 1, characterized in that, The gas replenishment bus is provided with a third gas replenishment branch relative to the first gas replenishment branch. The third gas replenishment branch is a fuel gas replenishment pipeline. A second gas replenishment inlet is provided at the end of the third gas replenishment branch away from the gas replenishment bus. The third air supply branch is connected in parallel with the air supply main branch to the fourth air supply branch, and the fourth air supply branch is connected to the second air supply inlet.

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