Wellhead lpg reciprocating compressor train

Abstract

The utility model relates to the technical field of compressor unit especially is a wellhead LPG reciprocating compressor unit, including industrial waste gas storage jar and two -phase separator, and the differential pressure regulating valve is set up between industrial waste gas storage jar and two -phase separator and is connected, and the first liquid accumulation jar and the first air intake washing jar are connected respectively on two -phase separator, the first compressor buffer tank is connected with the first compressor buffer tank and the first reciprocating compressor cylinder in the end of the first air intake washing jar away from two -phase separator, the first compressor buffer tank is provided with the first compressor buffer tank and the first reciprocating compressor cylinder, and the first compressor buffer tank, the first compressor buffer tank and the first reciprocating compressor cylinder form the integral component with each other, and the first air cooler is connected with the second air intake washing jar in the end away from the first compressor buffer tank. The utility model discloses through increasing the differential pressure regulating valve can realize the shunt of high pressure gas, realizes the high pressure reinjection of liquid. Ultimately through the renewal optimization process, the LPG gas-liquid mixed gas is pressurized.

Description

Technical Field

[0001] This utility model relates to the field of compressor unit technology, and in particular to a wellhead LPG reciprocating compressor unit. Background Technology

[0002] LPG gas collected at the wellhead typically contains a large amount of water and heavy hydrocarbons, and has a high initial pressure. However, as development and utilization progress, the pressure continuously decreases. Since LPG needs to be transported to downstream high-pressure LPG processing plants, the low wellhead pressure is insufficient for downstream gas delivery, necessitating pressurization. To address the large pressure and flow rate variations of LPG at the wellhead, reciprocating compressors are generally used. However, due to the incompressibility of liquids, LPG cannot generally be directly pressurized by reciprocating compressors. Therefore, dedicated compressor units are required to achieve LPG pressurization. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wellhead LPG reciprocating compressor unit.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A wellhead LPG reciprocating compressor unit includes an industrial waste gas storage tank and a two-phase separator. The industrial waste gas storage tank and the two-phase separator are connected and equipped with a differential pressure regulating valve. The two-phase separator is respectively connected to a first liquid accumulation tank and a first air intake scrubbing tank. The end of the first air intake scrubbing tank away from the two-phase separator is connected to a first compressor buffer tank. The first compressor buffer tank is equipped with a second compressor buffer tank and a first reciprocating compressor cylinder. The first compressor buffer tank, the second compressor buffer tank, and the first reciprocating compressor cylinder form an integral component. The second compressor buffer tank is also connected to a first air cooler. The end of the first air cooler away from the second compressor buffer tank is connected to a second air intake scrubbing tank.

[0006] Furthermore, the end of the second intake scrubbing tank away from the first air cooler is connected to a third compressor buffer tank, which includes a second reciprocating compressor cylinder and a fourth compressor buffer tank.

[0007] Furthermore, a second air cooler is connected to the fourth compressor buffer tank. The end of the second air cooler away from the fourth compressor buffer tank is connected to the first liquid collection tank and the second liquid collection tank respectively. A third shut-off valve is connected between the second air cooler and the first liquid collection tank.

[0008] Furthermore, a fourth shut-off valve and a fifth shut-off valve are connected between the second air cooler and the second liquid collection tank. The second liquid collection tank is also connected to the two-phase separator, and a sixth shut-off valve is connected between the second liquid collection tank and the two-phase separator.

[0009] Furthermore, a differential pressure regulating valve is connected between the second air cooler and the third shut-off valve, a first shut-off valve is provided between the two-phase separator and the first liquid collection tank, and a second shut-off valve is provided between the two-phase separator and the second liquid collection tank.

[0010] Compared with the prior art, this utility model proposes a wellhead LPG reciprocating compressor unit, which has the following beneficial effects:

[0011] This invention aims to make innovative improvements to address the shortcomings of existing technologies and enhance their practical effectiveness.

[0012] In this utility model, an industrial waste gas storage tank is connected to a two-phase separator and equipped with a differential pressure regulating valve. A first liquid storage tank and a first air intake scrubbing tank are respectively connected to the two-phase separator. The end of the first air intake scrubbing tank away from the two-phase separator is connected to a first compressor buffer tank. The first compressor buffer tank is equipped with a second compressor buffer tank and a first reciprocating compressor cylinder. The first compressor buffer tank, the second compressor buffer tank, and the first reciprocating compressor cylinder form an integral component. A first air cooler is also connected to the second compressor buffer tank. The end of the first air cooler away from the second compressor buffer tank is connected to a second air intake scrubbing tank. This utility model is an innovative utility model for wellhead LPG boosting reciprocating compressor units. By optimizing and improving the compressor process, the reciprocating compressor unit can boost LPG. This utility model uses the addition of a two-phase separator and a liquid storage tank to separate the LPG liquid into gas and liquid components for separate processing, solving the problem that reciprocating compressors cannot boost LPG. By adding a differential pressure regulating valve, high-pressure gas can be diverted, enabling high-pressure liquid reinjection. Ultimately, through process updates and optimizations, the pressurization of the LPG gas-liquid mixture was achieved. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a wellhead LPG reciprocating compressor unit proposed in this utility model.

[0014] In the diagram: 1. Industrial waste gas storage tank; 2. Two-phase separator; 3. Differential pressure regulating valve; 4. First liquid collection tank; 5. First air intake scrubbing tank; 6. First compressor buffer tank; 7. Second compressor buffer tank; 8. First reciprocating compressor cylinder; 9. First air cooler; 10. Second air intake scrubbing tank; 11. Third compressor buffer tank; 12. Second reciprocating compressor cylinder; 13. Fourth compressor buffer tank; 14. Second air cooler; 15. Second liquid collection tank; 16. Third shut-off valve; 17. Fourth shut-off valve; 18. Fifth shut-off valve; 19. Sixth shut-off valve; 20. Additional differential pressure regulating valve; 21. First shut-off valve; 22. Second shut-off valve. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 utility model 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, they should not be construed as limitations on this utility model.

[0017] Please refer to Figure 1 A wellhead LPG reciprocating compressor unit includes an industrial waste gas storage tank 1 and a two-phase separator 2. The industrial waste gas storage tank 1 and the two-phase separator 2 are connected and equipped with a differential pressure regulating valve 3. The two-phase separator 2 is respectively connected to a first liquid accumulation tank 4 and a first air intake scrubbing tank 5. The end of the first air intake scrubbing tank 5 away from the two-phase separator 2 is connected to a first compressor buffer tank 6. The first compressor buffer tank 6 is equipped with a second compressor buffer tank 7 and a first reciprocating compressor cylinder 8. The first compressor buffer tank 6, the second compressor buffer tank 7 and the first reciprocating compressor cylinder 8 form an integral component. The second compressor buffer tank 7 is also connected to a first air cooler 9. The end of the first air cooler 9 away from the second compressor buffer tank 7 is connected to a second air intake scrubbing tank 10.

[0018] The second intake air washing tank 10 is connected to a third compressor buffer tank 11 at the end away from the first air cooler 9. The third compressor buffer tank 11 includes a second reciprocating compressor cylinder 12 and a fourth compressor buffer tank 13.

[0019] The fourth compressor buffer tank 13 is also connected to a second air cooler 14. The end of the second air cooler 14 away from the fourth compressor buffer tank 13 is connected to the first liquid collection tank 4 and the second liquid collection tank 15 respectively. The second air cooler 14 is connected to the first liquid collection tank 4 by a third shut-off valve 16.

[0020] A fourth shut-off valve 17 and a fifth shut-off valve 18 are connected between the second air cooler 14 and the second liquid collection tank 15. The second liquid collection tank 15 is also connected to the two-phase separator 2, and a sixth shut-off valve 19 is connected between the second liquid collection tank 15 and the two-phase separator 2.

[0021] A differential pressure regulating valve 20 is also connected between the second air cooler 14 and the third shut-off valve 16. A first shut-off valve 21 is also provided between the two-phase separator 2 and the first liquid collection tank 4. A second shut-off valve 22 is provided between the two-phase separator 2 and the second liquid collection tank 15.

[0022] In this invention, during use, a two-phase separator 2, a first liquid collection tank 4, and a second liquid collection tank 15 are added before the standard reciprocating compressor. A differential pressure regulating valve 3 is also added. LPG liquid, after being drawn from the wellhead, enters the two-phase separator 2 of the compressor unit, where gas and liquid are separated. The separated gas enters the first intake scrubbing tank 5 for further separation and then enters the compressor cylinder for pressurization. The separated liquid enters the first liquid collection tank 4 for collection. When the first liquid collection tank 4 reaches the discharge level, the first shut-off valve 21 of the first liquid collection tank 4 is shut off, and then the second shut-off valve 22 is opened. The second liquid collection tank 15 enters the collection state, and the first liquid collection tank 4 enters the discharge state. When the third shut-off valve 16 and the fourth shut-off valve 17 are opened, the process gas will have a pressure difference of 15-50 psig higher before the valve and after the valve when passing through the differential pressure regulating valve 20 (the specific value is calculated according to the required drainage rate of the plant). In this way, the pressure of the third shut-off valve 16 will be higher than that of the fourth shut-off valve 17. The gas will purge the liquid collected in the first liquid collection tank 4 and reinject it after the differential pressure regulating valve to mix with the compressed gas. In this way, a high-pressure gas-liquid mixture is obtained in the exhaust pipeline of the compressor unit and then transported to the downstream plant for processing. After the second liquid collection tank 15 is full, it switches to the first liquid collection tank 4 for collection and then enters the drainage process, which is the same as the drainage process of the first liquid collection tank 4.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wellhead LPG reciprocating compressor unit, comprising an industrial waste gas storage tank (1) and a two-phase separator (2), characterized in that, The industrial waste gas storage tank (1) is connected to the two-phase separator (2) and is equipped with a differential pressure regulating valve (3). The two-phase separator (2) is connected to a first liquid collection tank (4) and a first air intake scrubbing tank (5). The first air intake scrubbing tank (5) is connected to a first compressor buffer tank (6) at the end away from the two-phase separator (2). The first compressor buffer tank (6) is equipped with a second compressor buffer tank (7) and a first reciprocating compressor cylinder (8). The first compressor buffer tank (6), the second compressor buffer tank (7) and the first reciprocating compressor cylinder (8) form an integral component. The second compressor buffer tank (7) is also connected to a first air cooler (9). The first air cooler (9) is connected to a second air intake scrubbing tank (10) at the end away from the second compressor buffer tank (7).

2. The wellhead LPG reciprocating compressor unit according to claim 1, characterized in that, The second intake scrubbing tank (10) is connected to a third compressor buffer tank (11) at the end away from the first air cooler (9). The third compressor buffer tank (11) includes a second reciprocating compressor cylinder (12) and a fourth compressor buffer tank (13).

3. The wellhead LPG reciprocating compressor unit according to claim 2, characterized in that, The fourth compressor buffer tank (13) is also connected to a second air cooler (14). The end of the second air cooler (14) away from the fourth compressor buffer tank (13) is connected to the first liquid collection tank (4) and the second liquid collection tank (15). The second air cooler (14) is connected to the first liquid collection tank (4) by a third shut-off valve (16).

4. A wellhead LPG reciprocating compressor unit according to claim 3, characterized in that, The second air cooler (14) and the second liquid collection tank (15) are connected by a fourth shut-off valve (17) and a fifth shut-off valve (18). The second liquid collection tank (15) is also connected to the two-phase separator (2), and a sixth shut-off valve (19) is connected between the second liquid collection tank (15) and the two-phase separator (2).

5. A wellhead LPG reciprocating compressor unit according to claim 3, characterized in that, A differential pressure regulating valve (20) is also connected between the second air cooler (14) and the third shut-off valve (16), a first shut-off valve (21) is also provided between the two-phase separator (2) and the first liquid collection tank (4), and a second shut-off valve (22) is provided between the two-phase separator (2) and the second liquid collection tank (15).

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