Gas well produced fluid transfer system and conditioning method

Abstract

The application provides a gas well produced fluid transfer system, which comprises a separation mechanism, a gas blocking mechanism and a regulating method. The separation mechanism comprises a separation chamber for receiving fluid and a first outlet arranged at the bottom end of the separation chamber. The gas blocking mechanism comprises a gas blocking chamber, a gas pipeline arranged at the top end of the gas blocking chamber and connected with the separation chamber, and an inlet arranged at the bottom end of the gas blocking chamber. A liquid pipeline is arranged between the first outlet and the inlet. Fluid in the gas blocking chamber can be separated into gas and liquid under the action of gravity. The separated gas flows back to the separation chamber through the gas pipeline, and the separated liquid remains in the gas blocking chamber.

Description

Technical Field

[0001] This invention relates to the field of oil and gas extraction technology, specifically to a gas well produced fluid transfer system and a regulation method. Background Technology

[0002] Produced fluids from natural gas wells need to be transported to gas gathering stations and wastewater treatment plants. After the produced fluids are separated at a single well station, they are typically buffered in wastewater tanks before being transported to downstream stations via wastewater trucks or pumped pipelines. When the produced fluid volume is large, a large number of new wastewater tanks need to be built at the single well station, and a large number of wastewater trucks are required for transportation. Using pumped pipelines would significantly increase the construction, maintenance, and operating costs of the pumps. Furthermore, if the wastewater transfer pipeline is directly connected from the separation unit, cross-contamination is highly likely to occur during the liquid discharge process, leading to overpressure in the downstream transfer pipeline and potential safety accidents.

[0003] In existing technologies, anti-cross-gas devices mainly include mechanical, thermostatic, and thermodynamic types. The mechanical type works by incorporating a buffer / accumulator, using the accumulated liquid within the buffer / accumulator to provide buoyancy. The presence of the buffer / accumulator alters the pressure in the drainage system, requiring pumps / trucks for liquid transfer—this is the current conventional method. Thermostatic and thermodynamic types belong to the boiler steam field, utilizing the phase change of steam within the steam pipeline, from gas to liquid. The difference in properties before and after liquefaction is used to control valve opening and closing. These are not suitable for the natural gas industry where the extracted fluid is initially in a two-phase state of gas and liquid.

[0004] Therefore, it is desirable in the art to provide a gas well produced fluid transfer system to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a gas well produced fluid transfer system that utilizes pressure and transfer pipelines to achieve efficient and low-cost transfer of produced fluids. By receiving signals from different level gauges, the system enables the controller to make accurate judgments. Furthermore, a gas-blocking mechanism prevents gas leakage that could lead to overpressure in the downstream transfer pipeline when the third valve is closed. In addition, a regulation method is also provided.

[0006] According to a first aspect of the present invention, a gas well produced fluid transfer system is provided, comprising a separation mechanism including a separation chamber for receiving fluid and a first outlet disposed at the bottom end of the separation chamber;

[0007] An air-blocking mechanism includes an air-blocking chamber, an air supply pipe disposed at the top of the air-blocking chamber and connected to the separation chamber, and an inlet disposed at the bottom of the air-blocking chamber.

[0008] A liquid delivery pipe is provided between the first outlet and the inlet. The fluid in the gas-blocking chamber can be separated into gas and liquid under the action of gravity. The separated gas flows back to the separation chamber through the gas delivery pipe, while the separated liquid remains in the gas-blocking chamber.

[0009] In one embodiment, the gas-blocking mechanism includes a second outlet disposed at the bottom of the gas-blocking chamber, a first level gauge disposed at the lower end face of the gas-blocking chamber, and a second level gauge disposed at the upper end face of the gas-blocking chamber, wherein the second outlet is connected to the processing station via a drain pipe.

[0010] In one embodiment, the gas well produced fluid transfer system further includes a valve mechanism, which includes a first valve disposed on the fluid transfer pipeline, a second valve disposed on the gas transfer pipeline, and a third valve disposed on the drain pipe.

[0011] In one embodiment, a third level gauge is provided on the separation chamber, and the height of the third level gauge is 1 / 5 of the height of the separation chamber.

[0012] In one embodiment, the height value of the second level gauge is smaller than the height value of the third level gauge.

[0013] In one embodiment, the gas well produced fluid transfer system further includes a controller connected to the valve mechanism, the controller being configured to:

[0014] When the first level gauge detects no liquid and the third level gauge detects liquid, the third valve can be closed and the first valve and the second valve can be opened to allow gas to flow from the gas-blocking chamber to the separation chamber.

[0015] When the second level gauge detects liquid while the fourth level gauge detects no liquid, the first valve and the second valve can be closed.

[0016] In one embodiment, a fourth level gauge is provided on the separation chamber, and the height value of the fourth level gauge is greater than the height value of the third level gauge.

[0017] The controller is configured to open the first valve and the third valve when it receives a liquid presence signal from the fourth level gauge, so as to allow liquid to be discharged sequentially through the infusion pipe, the gas-blocking chamber and the drain pipe.

[0018] In one embodiment, a fifth level gauge is provided on the separation chamber, and the height value of the fifth level gauge is smaller than the height value of the third level gauge.

[0019] The controller is configured to close the first valve and the third valve when it receives a no-liquid signal from the fifth level gauge.

[0020] According to a second aspect of the present invention, a method for regulating a gas well produced fluid transfer system as described above is provided, comprising the following steps:

[0021] When the controller receives a liquid signal from the fourth level gauge, it opens the first valve and the third valve to allow liquid to be discharged sequentially through the infusion pipe, the air-blocking chamber and the drain pipe.

[0022] When the no-liquid signal is received from the fifth level gauge, the first valve and the third valve are closed.

[0023] In one embodiment, an anti-cross-flow step is included:

[0024] When the first level gauge detects no liquid and the third level gauge detects liquid, the controller can close the third valve and open the second valve to allow gas to flow from the gas-blocking chamber to the separation chamber.

[0025] When the second level gauge detects liquid, the controller can close the first valve and the second valve.

[0026] Compared with the prior art, the advantages of the present invention are as follows:

[0027] Firstly, this invention utilizes pressure and transfer pipelines to achieve efficient and low-cost transfer of produced liquid, and can receive signals from different level gauges to enable the controller to make accurate judgments. Specifically, when the level of the produced liquid in the gas well exceeds the highest level (fourth level gauge), the first and third valves are opened, using the pressure of the natural gas well as power to force the liquid to pass sequentially through the first valve, the delivery pipeline, the gas-blocking chamber, and the third valve, thereby achieving the purpose of intelligent and safe transfer of produced liquid using natural gas pressure energy; when the level of the produced liquid in the gas well is lower than the lowest level (fifth level gauge), the third valve is closed to prevent gas from entering the delivery pipeline.

[0028] Secondly, to prevent gas leakage and overpressure in the downstream transfer pipeline when the third valve is closed, this invention incorporates a gas-blocking mechanism. In this invention, the gas in the gas-blocking chamber gathers at the top to form a gas barrier, thereby hindering the outward transport of the gas well's produced fluid. This achieves the goal of intelligently and safely transferring the gas well's produced fluid using the pressure energy of the natural gas at the wellhead.

[0029] In addition, when the first level gauge detects no liquid and the third level gauge detects liquid, the controller can close the third valve and open the first and second valves to allow the gas in the gas-blocking chamber to flow back to the separation chamber through the gas pipeline, thereby realizing natural gas recovery and avoiding the release of natural gas into the atmosphere, which would pollute the environment. Attached Figure Description

[0030] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0031] Figure 1 The schematic diagram illustrates the structure of a gas well produced fluid transfer system according to the present invention.

[0032] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0033] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0034] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0036] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The invention will now be further described with reference to the accompanying drawings.

[0038] Figure 1 The schematic diagram shows the structure of a gas well produced fluid transfer system 100 according to the present invention.

[0039] like Figure 1 As shown, according to a first aspect of the present invention, a gas well produced fluid transfer system 100 is provided, including a separation mechanism. Preferably, the separation mechanism includes a separation chamber 10 for receiving fluid, a first outlet 11 disposed at the bottom end of the separation chamber 10, and an exhaust pipe 12 disposed at the top end of the separation chamber 10 and connected to the outside.

[0040] In this invention, the fluid is a mixture of gas well produced fluid and wellhead natural gas. Preferably, when the fluid is in the separation chamber 10, the gas well produced fluid gathers in the lower part of the separation chamber 10, while the wellhead natural gas gathers in the upper part of the separation chamber 10.

[0041] According to the present invention, the gas well produced fluid transfer system 100 further includes a gas-blocking mechanism. For example... Figure 1 As shown, preferably, the gas-blocking mechanism includes a gas-blocking chamber 20, a gas supply pipe 32 disposed at the top of the gas-blocking chamber 20, and an inlet 21 disposed at the bottom of the gas-blocking chamber 20. The gas-blocking chamber 20 is connected to the separation chamber 10 through the gas supply pipe 32, thereby enabling the gas that has entered the gas-blocking chamber 20 to flow back to the separation chamber 10 through the gas supply pipe 32, as described below.

[0042] In one embodiment, such as Figure 1 As shown, a liquid delivery pipe 31 is provided between the first outlet 11 of the separation chamber 10 and the inlet 21 of the gas-blocking chamber 20. Therefore, the fluid in the separation chamber 10 can enter the gas-blocking chamber 20 in sequence through the first outlet 11, the liquid delivery pipe 31 and the inlet 21, as described below.

[0043] According to a specific embodiment of the present invention, the fluid in the gas-blocking chamber 20 can undergo gas-liquid separation under the action of gravity. The separated gas flows back to the separation chamber 10 through the gas transmission pipeline 32, thereby realizing natural gas recovery and centralized processing, so as to further ensure the environmental protection of the gas well produced fluid transfer system 100; the separated liquid remains in the gas-blocking chamber 20 and is adjusted in real time according to subsequent conditions.

[0044] In one embodiment, such as Figure 1 As shown, the gas-blocking mechanism also includes a second outlet 22 located at the bottom of the gas-blocking chamber 20. Preferably, the second outlet 22 of the gas-blocking chamber 20 is connected to the treatment station via a drain pipe 33, thereby ensuring that the liquid in the gas-blocking chamber 20 can be smoothly transferred to the treatment station through the second outlet 22 and the drain pipe 33 in sequence. The treatment station in this invention includes a gas collection station or a sewage treatment station.

[0045] According to the present invention, the gas well produced fluid transfer system 100 further includes a valve mechanism. For example... Figure 1 As shown, the valve mechanism includes a first valve 311 installed on the infusion pipeline 31, a second valve 321 installed on the gas pipeline 32, and a third valve 331 installed on the drain pipe 33.

[0046] In a preferred embodiment, the gas well produced fluid transfer system 100 further includes a controller 40 connected to the valve mechanism. Preferably, the controller 40 is capable of controlling the opening and closing of the first valve 311, the second valve 321, and the third valve 331, respectively.

[0047] In one embodiment, such as Figure 1 As shown, the separation mechanism also includes a fourth level gauge 102 installed on the separation chamber 10. Preferably, the height of the fourth level gauge 102 accounts for 2 / 5 of the height of the separation chamber 10. It is easy to understand that the fourth level gauge 102 is the upper limit of liquid storage in the separation chamber 10, that is, when this value is reached, liquid needs to be drained in time to prevent liquid overflow.

[0048] According to a specific embodiment of the present invention, the controller 40 is configured to simultaneously open the first valve 311 and the third valve 331 when it receives a liquid presence signal from the fourth level gauge 102, thereby allowing the liquid in the separation chamber 10 to be discharged sequentially through the infusion pipe 31, the gas blocking chamber 20 and the drain pipe 33.

[0049] In one embodiment, such as Figure 1 As shown, the separation mechanism also includes a fifth level gauge 103 disposed on the separation chamber 10 and below the fourth level gauge 102. Preferably, the height of the fifth level gauge 103 is 1 / 10 of the height of the separation chamber 10. It is easy to understand that the fifth level gauge 103 is the lower limit of the liquid storage in the separation chamber 10, that is, when this value is reached, the first valve 311 needs to be closed in time to prevent gas from entering the liquid delivery pipeline 31.

[0050] According to a specific embodiment of the invention, the controller 40 is configured to close the first valve 311 and the third valve 331 when it receives a no-liquid signal from the fifth level gauge 103, thereby ensuring a minimum liquid level in the separation chamber 10 to prevent cross-contamination.

[0051] In this invention, when the controller 40 receives the no-liquid signal from the fifth level gauge 103, if the first valve 311 is not closed in time, the gas well produced fluid transfer system 100 will drain the fluid too quickly, which will cause the high-pressure gas in the separation chamber 10 to enter the fluid transfer pipeline 31, resulting in the fluid transfer pipeline 31 experiencing overpressure and bursting.

[0052] In order to prevent gas in the fluid in the separation chamber 10 from entering the liquid delivery pipeline 31, the present invention provides a first liquid level gauge 201 at the lower end face of the gas blocking chamber 20 and a second liquid level gauge 202 at the upper end face of the gas blocking chamber 20. By receiving the liquid presence or absence signals from the first liquid level gauge 201 and the second liquid level gauge 202, the gas blocking function is performed in a timely manner, thereby improving the safety of the gas well produced fluid transfer system 100.

[0053] Preferably, the internal space of the gas-blocking chamber 20 is larger than that of the infusion pipeline 31. Therefore, when the fluid discharged from the first outlet 11 of the separation chamber 10 enters the gas-blocking mechanism through the first valve 311, the fluid can be separated into gas and liquid under the action of gravity. The separated gas gathers in the upper part of the gas-blocking chamber 20, while the separated liquid gathers in the lower part of the gas-blocking chamber 20. Correspondingly, when the gas-blocking chamber 20 is filled with gas, the compressibility of the gas forms a gas barrier against the liquid, thereby preventing the liquid from continuing to flow into the gas-blocking chamber 20 through the infusion pipeline 31.

[0054] In one embodiment, such as Figure 1 As shown, a third level gauge 101 is provided on the separation chamber 10. Preferably, the third level gauge 101 is located between the fourth level gauge 102 and the fifth level gauge 103, and the height of the third level gauge 101 accounts for 1 / 5 of the height of the separation chamber 10. It is easy to understand that the third level gauge 101 represents the intermediate level of the separation chamber 10, thereby achieving the purpose of venting and returning the gas to the gas blocking mechanism, thus preventing the release of natural gas from the wellhead into the atmosphere and improving the environmental friendliness of the present invention.

[0055] In one embodiment, the height value of the second level gauge 202 is smaller than the height value of the third level gauge 101. Therefore, by comparing the detection values ​​of the second level gauge 202 and the third level gauge 101, the actual situation inside the separation chamber 10 and the air-blocking chamber 20 can be determined, which helps the controller 40 to make accurate judgments and issue execution commands quickly.

[0056] In order to ensure that the liquid in the separation chamber 10 can continue to be discharged through the infusion pipeline 31, the gas in the gas-blocking chamber 20 needs to be purged. The specific operating procedure will be described below.

[0057] In this invention, when the first level gauge 201 detects no liquid while the third level gauge 101 detects liquid, the controller 40 closes the third valve 331 to prevent liquid from returning to the separation chamber 10 through the delivery pipe 31, thereby ensuring the stability of the liquid within the delivery pipe 31 and the gas-blocking chamber 20. Simultaneously, the first valve 311 and the second valve 321 are opened to expel gas from the gas-blocking chamber 20 through the static pressure of the liquid; that is, the gas in the gas-blocking chamber 20 flows back to the separation chamber 10 through the gas delivery pipe 32 under hydraulic pressure.

[0058] In this invention, when the second level gauge 202 detects liquid (the fourth level gauge 102 detects no liquid), the controller 40 closes the first valve 311 and the second valve 321. Thus, the separation chamber 10 continues to receive fluid until the fluid level is higher than the fourth level gauge 102, and then the above-described transfer of gas well produced fluid is repeated.

[0059] In this invention, level gauges (third level gauge 101, fourth level gauge 102, and fifth level gauge 103) at different heights are installed on the gas-blocking chamber 20. By receiving signals (liquidity present or liquid absent) from different level gauges, the controller 40 is prompted to make an accurate judgment.

[0060] When the level of the produced fluid from the gas well exceeds the maximum level (fourth level gauge 102), the first valve 311 and the third valve 331 are opened. The pressure of the natural gas well in the separation chamber 10 is used as the driving force to make the liquid pass through the first valve 311, the liquid delivery pipeline 31, the gas blocking chamber 20 and the third valve 331 in sequence and be discharged, thereby achieving the purpose of intelligent and safe transfer of produced fluid using natural gas pressure energy.

[0061] When the level of the produced fluid from the gas well is lower than the minimum level (fifth level gauge 103), the third valve 331 is closed.

[0062] Meanwhile, to prevent gas leakage and overpressure in the downstream transfer pipeline when the third valve 331 is closed, a gas-blocking mechanism is installed after the first valve 311. Gas accumulates at the top of the gas-blocking chamber 20 to form a gas blockage, thereby hindering the outward transportation of produced fluid from the gas well.

[0063] According to a second aspect of the present invention, a method for regulating a gas well produced fluid transfer system as described above is provided, comprising the following steps.

[0064] First, upon receiving a liquid signal from the fourth level gauge 102, the controller 40 opens the first valve 311 and the third valve 331, allowing the liquid to be discharged sequentially through the infusion pipe 31, the air-blocking chamber 20, and the drain pipe 33, thus smoothly transferring it to the processing station.

[0065] Secondly, when the fifth level gauge 103 receives a no-liquid signal, the controller 40 closes the first valve 311 and the third valve 331 to ensure the minimum liquid volume in the separation chamber 10, thereby preventing gas leakage and improving the safety of the gas well produced fluid transfer system 100.

[0066] In one embodiment, the above adjustment method includes an anti-cross-flow step:

[0067] First, when the first level gauge 201 detects no liquid and the third level gauge 101 detects liquid, the controller 40 closes the third valve 331 to prevent liquid from returning to the separation chamber 10 through the infusion pipeline 31, thereby ensuring the stability of the liquid in the infusion pipeline 31 and the gas blocking chamber 20. The controller 40 opens the first valve 311 and the second valve 321, thereby allowing the gas that has entered the gas blocking chamber 20 to flow back to the separation chamber 10 through the gas infusion pipeline 32. That is, the gas in the gas blocking chamber 20 flows back to the separation chamber 10 through the gas infusion pipeline 32 under the action of hydraulic pressure.

[0068] Then, when the second level gauge 202 detects liquid (the fourth level gauge 102 detects no liquid), the first valve 311 and the second valve 321 are closed by the controller 40. As a result, the separation chamber 10 will continue to receive fluid until the fluid level is higher than the fourth level gauge 102, and then the above-mentioned transfer of gas well produced fluid will be repeated.

[0069] Compared with existing technologies, the advantages of this invention are:

[0070] Firstly, this invention utilizes pressure and transfer pipelines to achieve efficient and low-cost transfer of produced liquid, and can receive signals from different level gauges to prompt the controller 40 to make accurate judgments. Specifically, when the level of the produced liquid in the gas well exceeds the highest level (fourth level gauge 102), the first valve 311 and the third valve 331 are opened, using the pressure of the natural gas well as power to cause the liquid to be discharged sequentially through the first valve 311, the delivery pipeline 31, the gas-blocking chamber 20, and the third valve 331, thereby achieving the purpose of intelligent and safe transfer of produced liquid using natural gas pressure energy; when the level of the produced liquid in the gas well is lower than the lowest level (fifth level gauge 103), the third valve 331 is closed, thereby preventing gas from entering the delivery pipeline 31.

[0071] Secondly, to prevent gas leakage and overpressure in the downstream transfer pipeline when the third valve 331 is closed, this invention includes a gas-blocking mechanism. In this invention, the gas in the gas-blocking chamber 20 gathers at the top to form a gas barrier, thereby hindering the outward transmission of the gas well produced fluid, thus achieving the goal of intelligent and safe transfer of the gas well produced fluid using the pressure energy of the natural gas at the wellhead.

[0072] In addition, when the first level gauge 201 detects no liquid and the third level gauge 101 detects liquid, the controller 40 can close the third valve 331 and open the first valve 311 and the second valve 321 so that the gas in the gas blocking chamber 20 can flow back to the separation chamber 10 through the gas pipeline 32, thereby further increasing the pumping head of the produced liquid and achieving the purpose of pipeline transportation.

[0073] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A gas well produced fluid transfer system, comprising: a separation mechanism comprising a separation chamber (10) for receiving fluid, and a first outlet (11) provided at a bottom end of the separation chamber (10); a gas blocking mechanism comprising a gas blocking chamber (20), a gas pipeline (32) provided at a top end of the gas blocking chamber (20) and connected with the separation chamber (10), and an inlet (21) provided at a bottom end of the gas blocking chamber (20), wherein a fluid pipeline (31) is provided between the first outlet (11) and the inlet (21), fluid in the gas blocking chamber (20) can be separated into gas and liquid under the action of gravity, the separated gas flows back into the separation chamber (10) through the gas pipeline (32), and the separated liquid remains in the gas blocking chamber (20), the gas blocking mechanism further comprises a second outlet (22) provided at the bottom end of the gas blocking chamber (20), a first liquid level meter (201) provided at a lower end surface of the gas blocking chamber (20), and a second liquid level meter (202) provided at an upper end surface of the gas blocking chamber (20), wherein the second outlet (22) is connected with a treatment station through a liquid discharge pipeline (33), the gas well produced fluid transfer system further comprises a valve mechanism, the valve mechanism comprises a first valve (311) provided on the fluid pipeline (31), a second valve (321) provided on the gas pipeline (32), and a third valve (331) provided on the liquid discharge pipeline (33), a third liquid level meter (101) is provided on the separation chamber (10), the height of the third liquid level meter (101) accounts for 1 / 5 of the height of the separation chamber (10), the height value of the second liquid level meter (202) is smaller than the height value of the third liquid level meter (101), and the gas well produced fluid transfer system further comprises a controller (40) connected with the valve mechanism, the controller is configured to: when the first liquid level meter (201) detects no liquid and the third liquid level meter (101) detects liquid, the third valve (331) is closed and the first valve (311) and the second valve (321) are opened to allow gas to flow from the gas blocking chamber (20) to the separation chamber (10); when the second liquid level meter (202) detects liquid, the first valve (311) and the second valve (321) are closed.

2. The gas well production fluid transfer system of claim 1, wherein, a fourth liquid level meter (102) is provided on the separation chamber (10), the height value of the fourth liquid level meter (102) is greater than the height value of the third liquid level meter (101), the controller is configured to open the first valve (311) and the third valve (331) when receiving a liquid signal of the fourth liquid level meter (102) to allow liquid to be discharged through the fluid pipeline (31), the gas blocking chamber (20) and the liquid discharge pipeline (33) in sequence.

3. The gas well production fluid transfer system of claim 2, wherein, a fifth liquid level meter (103) is provided on the separation chamber (10), the height value of the fifth liquid level meter (103) is smaller than the height value of the third liquid level meter (101), The controller is configured to close the first valve (311) and the third valve (331) upon receiving a no liquid signal from the fifth liquid level meter (103).

4. A regulating method for the gas well produced fluid transfer system according to claim 3, comprising the following steps: Upon receiving a liquid signal from the fourth liquid level meter (102), the controller opens the first valve (311) and the third valve (331) to allow liquid to flow through the liquid transfer pipe (31), the gas blocking chamber (20) and the liquid discharge pipe (33) in sequence; Upon receiving a no liquid signal from the fifth liquid level meter (103), the controller closes the first valve (311) and the third valve (331).

5. The conditioning method of claim 4, wherein, Including a step of preventing gas cross flow: Upon detecting no liquid by the first liquid level meter (201) and detecting liquid by the third liquid level meter (101), the controller closes the third valve (331) and opens the first valve (311) and the second valve (321) to allow gas to flow from the gas blocking chamber (20) to the separation chamber (10); Upon detecting liquid by the second liquid level meter (202), the controller closes the first valve (311) and the second valve (321).

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