Separation system

Abstract

The present invention provides a separation system, including a separator, an exhaust pipe, a liquid level detector, a sewage valve group and a control unit. The first sewage pipe is connected to the separator and to one end of each connecting pipe, and the other end of each connecting pipe is connected to the second sewage pipe, and the multiple connecting pipes do not affect each other. Each valve assembly is used to control the on and off of the corresponding connecting pipe. The liquid level detector is used to detect the liquid level of solid and liquid impurities in the separator. The control unit is electrically connected to the liquid level detector and the valve assembly, so that the control unit determines the number of valve assemblies to be opened according to the liquid level signal detected by the liquid level detector, and controls the corresponding valve assembly to open. Therefore, the separation system disclosed in the present invention can determine the number of valve assemblies to be opened according to the size of the wellhead gas flow rate, ensuring that the separated solid and liquid impurities can be quickly discharged from the separator, so that it is suitable for oil fields with different wellhead gas discharges, thereby improving the versatility of the separation system.

Description

Technical Field

[0001] The present invention relates to the technical field of separation systems, and in particular to a separation system. Background Art

[0002] The oil fields are widely distributed, and a large amount of wellhead gas is produced during the exploitation process. The wellhead gas is recycled through the natural gas purification process and the compression and boosting process. The wellhead gas is separated into gas and solid and liquid impurities by a separator, and the gas is discharged to the downstream equipment through an exhaust pipe, and the solid and liquid impurities are discharged to the sewage pool through a sewage pipe.

[0003] Wellhead gas is distributed in various oil fields, and different oil fields produce different wellhead gas flow rates. For wellhead gas with a larger flow rate, the separator can separate more solid and liquid impurities, and for wellhead gas with a smaller flow rate, the separator can separate fewer solid and liquid impurities. However, the discharge speed of the separator is fixed. For inlet gas with a large flow rate, there is a problem that impurities cannot be discharged as quickly as possible, and for wellhead gas with a small flow rate, there is a problem of excessive discharge. Therefore, the current separator has the problem of poor versatility. Summary of the invention

[0004] The object of the present invention is to provide a separation system to solve the problem of low versatility of the separation system in the related art.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] According to one aspect of the present invention, the present invention provides a separation system, comprising: a separator for separating wellhead gas and temporarily storing the gas and solid-liquid impurities separated by the wellhead gas; an exhaust pipe connected to the separator and used to discharge the gas; a liquid level detector, whose detection end is located in the separator, for detecting the liquid level of the solid-liquid impurities in the separator; a sewage valve group, comprising a first sewage pipe, a second sewage pipe, a plurality of connecting pipes and a plurality of valve assemblies; the first sewage pipe is connected to the separator and is connected to one end of each of the connecting pipes; the other end of each of the connecting pipes is connected to the second sewage pipe; each of the valve assemblies is used to control the on and off of one of the connecting pipes; and a control unit, which is electrically connected to the liquid level detector and each of the valve assemblies; the control unit determines the number of the valve assemblies opened according to the liquid level signal received from the liquid level detector, and controls the corresponding number of the valve assemblies to open, so that the separation system can adjust the sewage discharge according to the liquid level.

[0007] Optionally, the valve assembly is an electric valve, and the electric valve is connected to the corresponding connecting pipe; the electric valve is switched to an open state or a closed state under the control of the control unit.

[0008] Optionally, the electric valve is a normally closed solenoid valve.

[0009] Optionally, the valve assembly includes a solenoid valve and a pneumatic valve, the solenoid valve is electrically connected to the control unit, and the solenoid valve has an air inlet and an air outlet; the separation system also includes an instrument air duct and a bronchial pipe for air intake, the two ends of the bronchial pipe are connected to the air outlet of the instrument air duct and the air inlet of the solenoid valve, the air outlet of the solenoid valve is connected to the air inlet of the pneumatic valve to control the on and off of the pneumatic valve; the pneumatic valve is connected to the connecting pipe to control the on and off of the connecting pipe.

[0010] Optionally, the pneumatic valve is a normally closed pneumatic valve.

[0011] Optionally, the separator includes a tank body, which is provided with an air inlet, an air outlet and a sewage outlet; the air outlet is arranged at the top end of the tank body; the sewage outlet is arranged at the bottom end of the tank body; the air inlet is located between the air outlet and the sewage outlet.

[0012] Optionally, the first sewage pipe is provided with a first opening connected to the sewage outlet, and the first opening is located at one end of the first sewage pipe; the other end of the first sewage pipe is a sealed end; the second sewage pipe is provided with a second opening for discharging sewage to the outside, and the second opening is lower than the first opening in the height direction; the second opening is located at one end of the second sewage pipe; the other end of the second sewage pipe is a sealed end.

[0013] Optionally, the first sewage pipe is parallel to the second sewage pipe; a plurality of connecting pipes are arranged at intervals along the extension direction of the first sewage pipe, and the connecting pipes are parallel to each other.

[0014] Optionally, the connecting pipe is connected to the second sewage pipe in a downwardly inclined manner from the first sewage pipe.

[0015] Optionally, the control unit is an electrical control box having a built-in PLC programmable controller.

[0016] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0017] In an embodiment of the present invention, the first sewage pipe is connected to the separator and is connected to one end of each connecting pipe, and the other end of each connecting pipe is connected to the second sewage pipe. The multiple connecting pipes do not affect each other and are independently output to the second sewage pipe. Each valve assembly is used to control the on and off of the corresponding connecting pipe. The liquid level detector is used to detect the liquid level of solid and liquid impurities in the separator. The control unit is electrically connected to the liquid level detector and the valve assembly, so that the control unit determines the number of valve assemblies to be opened according to the liquid level signal detected by the liquid level detector, that is, according to the amount of liquid temporarily stored in the separator, and controls the corresponding valve assembly to open. Therefore, the separation system disclosed in the present invention can determine the number of valve assemblies to be opened according to the size of the wellhead gas flow rate, ensuring that the separated solid and liquid impurities can be quickly discharged from the separator, thereby being suitable for oil fields with different wellhead gas discharges, thereby improving the versatility of the separation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the separation system according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of a sewage valve group in a separation system according to an embodiment of the present invention.

[0020] The following are the descriptions of the reference numerals:

[0021] 100. Separation system;

[0022] 1. separator; 11. tank body; 11a. air inlet; 11b. air outlet; 11c. sewage outlet;

[0023] 2. Exhaust pipe;

[0024] 3. Liquid level detector;

[0025] 4. Drain valve group; 41. First drain pipe; 41a. First opening; 42. Second drain pipe; 42a. Second opening; 43. Connecting pipe; 44. Valve assembly; 441. Solenoid valve; 442. Pneumatic valve; 45. Instrument air duct; 46. Bronchus;

[0026] 5. Control unit; 51. PLC programmable controller;

[0027] 6. Intake pipe. DETAILED DESCRIPTION

[0028] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially used for illustration purposes rather than for limiting the present invention.

[0029] See also Figure 1As shown, the separation system 100 provided in the embodiment of the present invention mainly includes a separator 1, an exhaust pipe 2, a liquid level detector 3, a drain valve group 4, a control unit 5 and an air intake pipe 6. The separator 1 can adopt a centrifugal separation component or a gravity separation component, and the separator 1 is mainly used to separate wellhead gas.

[0030] For centrifugal separation components, the separation components generate centrifugal force on the wellhead gas in the startup state. Since there is a density difference between the gas and solid and liquid impurities in the wellhead gas, and the centrifugal force on the solid and liquid impurities is greater than the centrifugal force on the gas, the solid and liquid impurities have a tendency to be centrifugally separated. The solid and liquid impurities adhere to the separation wall and are discharged downward due to gravity. Among them, the solid and liquid impurities include solid particles and free water.

[0031] The separator 1 includes a tank body 11, which is used to temporarily store the gas separated from the wellhead gas and the solid and liquid impurities mixed in the gas. The separation component is arranged in the tank body. The tank body 11 is provided with an air inlet 11a, an air outlet 11b and a sewage outlet 11c, and the air inlet 11a, the air outlet 11b and the sewage outlet 11c can be circular holes.

[0032] The air inlet 11a is optionally provided in the cylinder of the tank body 11, and is used to connect the air inlet pipe 6 for inputting wellhead gas, so that the wellhead gas enters the tank body 11 along the air inlet 11a. Specifically, the air inlet 11a is provided above the upper half of the tank body 11.

[0033] The gas outlet 11b may be optionally provided at the end portion of the tank body 11, and may be disposed at the top of the tank body 11, for discharging gas, so that the gas is discharged through the top of the tank body 11.

[0034] The sewage outlet 11c can be optionally opened at the bottom end of the tank body 11, and is arranged at the bottom end of the tank body 11, and the solid and liquid impurities gather at the bottom end of the tank body 11, so that the solid and liquid impurities are easily discharged along the sewage outlet 11c under the action of their own gravity.

[0035] The exhaust pipe 2 is mainly used to exhaust gas. The exhaust pipe 2 can be a round pipe, and its air inlet is sealedly connected to the air inlet 11a of the tank body 11, so that the exhaust pipe 2 is connected to the separator 1 and extends upward. The diameter of the exhaust pipe 2 is adjusted according to actual conditions.

[0036] The liquid level detector 3 is used to detect the liquid level of solid and liquid impurities in the separator 1. The liquid level detector 3 can be selected as a liquid level sensor and can be adjusted according to the detection environment. The detection end of the liquid level detector 3 is located in the separator 1. Specifically, the detection end of the liquid level detector 3 is plugged into the inner wall of the tank body 11.

[0037] The liquid level detector 3 is provided with a magnetic ring (not shown) and a coil (not shown), and the magnetic ring and the coil form an LG circuit, which can convert the liquid level of solid and liquid impurities in the separator 1 into an inductance value, thereby feeding back the inductance value to the control unit 5.

[0038] The control unit 5 is an electrical control box, which has a built-in PLC programmable controller 51, and the input end of the PLC programmable controller 51 is electrically connected to the liquid level detector 3. The control unit 5 receives the liquid level signal output by the liquid level detector 3 in real time through the PLC programmable controller 51, and controls the valve assembly 44 according to the received liquid level signal, so that the solid and liquid impurities temporarily stored in the tank body 1 are discharged in time, so that the liquid level of the solid and liquid impurities in the separator 1 is maintained between the upper limit liquid level and the lower limit liquid level.

[0039] Furthermore, the PLC programmable controller 51 can also be electrically connected to an alarm. When the liquid level of solid-liquid impurities in the separator 1 is higher than the upper limit liquid level or lower than the lower limit liquid level, the PLC programmable controller triggers the alarm and warns the operator through the alarm.

[0040] Combination Figure 2 As shown, the blowdown valve group 4 is mainly used to automatically discharge the solid and liquid impurities in the separator 1. The blowdown valve group 4 adjusts the discharge amount under the control of the control unit 5 to adjust the flow of the solid and liquid impurities so that the liquid level of the solid and liquid impurities in the separator 1 is maintained between the upper limit liquid level and the lower limit liquid level. The blowdown valve group 4 can adaptively regulate different liquid level signals under the control of the control unit 5.

[0041] The sewage valve group 4 includes a first sewage pipe 41, a second sewage pipe 42, a plurality of connecting pipes 43 and a plurality of valve assemblies 44. Each connecting pipe 43 is connected to the first sewage pipe 41 and the second sewage pipe 42, and is installed with a corresponding valve assembly 44, which is used to control the opening and closing of the connecting pipe 43.

[0042] The first sewage pipe 41 may be a round pipe. The first sewage pipe 41 is connected to the separator 1 and is located below the separator 1.

[0043] The first sewage pipe 41 is used to connect the separator 1 and each connecting pipe 43. The first sewage pipe 41 is provided with a first opening 41a, which is connected to the sewage outlet 11c and is located at one end of the first sewage pipe 41, and the other end of the first sewage pipe 41 is a sealed end. Optionally, the first opening 41a is located at the top end of the first sewage pipe 41, and the bottom end of the first sewage pipe 41 is a sealed end.

[0044] The second sewage pipe 42 may be a round pipe. The second sewage pipe 42 is used to discharge the solid and liquid impurities separated by the wellhead gas. The diameter of the second sewage pipe 42 and the diameter of the first sewage pipe 41 may be adjusted according to actual conditions.

[0045] The second sewage pipe 42 is provided with a second opening 42a, and the second opening 42a is used to discharge solid and liquid impurities outward. The second opening 42a is located at one end of the second sewage pipe 42, and the other end of the second sewage pipe 42 is a sealed end. Optionally, the second opening 42a is located at the bottom end of the second sewage pipe 42, and the top end of the second sewage pipe 42 is a sealed end.

[0046] The second opening 42a is lower than the first opening 41a in height direction, so that solid and liquid impurities can be discharged faster due to potential energy difference, thereby simplifying the arrangement of the second sewage pipe 42 and the first sewage pipe 41. Optionally, the second sewage pipe 42 is parallel to the first sewage pipe 41.

[0047] The connecting pipe 43 may be a round pipe. There are multiple connecting pipes 43, one end of each connecting pipe 43 is connected to the first sewage pipe 41, and the other end is connected to the second sewage pipe 42, so that each connecting pipe 43 realizes the connection between the first sewage pipe 41 and the second sewage pipe 42, so that each connecting pipe 43 collects solid and liquid impurities in the second sewage pipe 42 respectively, and multiple connecting pipes 43 do not affect each other, and are independently output to the second sewage pipe 42, effectively increasing the sewage discharge volume of the second sewage pipe 42.

[0048] Optionally, a plurality of connecting pipes 43 are arranged at intervals in the extension direction of the first sewage pipe 41 , and adjacent connecting pipes 43 are parallel to each other.

[0049] Furthermore, the connecting pipe 43 is connected to the second sewage pipe 42 from the first sewage pipe 41 in a downwardly inclined manner, so that solid and liquid impurities can flow to the second sewage pipe 42 better under the action of gravity, thereby increasing the flow rate of solid and liquid impurities and improving the sewage discharge efficiency of the second sewage pipe 42.

[0050] The valve assembly 44 has multiple groups, and the multiple groups of valve assemblies 44 correspond to the multiple connecting pipes 43 one by one, and are installed on the corresponding connecting pipes 43. The valve assembly 44 is used to adjust the connecting pipe 43 to be in an open state or a closed state.

[0051] Each valve assembly 44 is electrically connected to the output end of the control unit 5 , so that each valve assembly 44 is electrically connected to the PLC programmable controller 51 , and is adjusted to an open state or a closed state under the control of the PLC programmable controller 51 , thereby adjusting the use state of each connecting pipe 43 .

[0052] Among them, the PLC programmable controller 51 receives the liquid level signal from the liquid level detector 4, determines the number of valve assemblies 44 opened according to the liquid level signal, and controls the corresponding number of valve assemblies 44 to open, so that the separation system 100 can adjust the sewage discharge according to the liquid level.

[0053] An upper limit liquid level and a lower limit liquid level can be set in the PLC programmable controller 51 . The upper limit liquid level corresponds to the highest safe liquid level of solid-liquid impurities in the separator 1 , and the lower limit liquid level corresponds to the lowest safe liquid level of solid-liquid impurities in the separator 1 .

[0054] When the liquid level of the solid-liquid impurities in the separator 1 is higher than the upper limit liquid level, the PLC programmable controller 51 controls the multiple valve assemblies 44 to open to ensure that the separated solid-liquid impurities can be quickly discharged from the separator 1, so that the liquid level of the solid-liquid impurities in the separator 1 is between the upper limit liquid level and the lower limit liquid level. As the liquid level of the solid-liquid impurities in the separator 1 gradually decreases, the number of valve assemblies 44 opened by the PLC programmable controller 51 also decreases accordingly.

[0055] When the liquid level of the solid-liquid impurities in the separator 1 is between the upper limit liquid level and the lower limit liquid level, the PLC programmable controller 51 controls each valve assembly 44 to close, ensuring that the liquid level of the solid-liquid impurities in the separator 1 is between the upper limit liquid level and the lower limit liquid level.

[0056] When the liquid level of the solid-liquid impurities in the separator 1 is lower than the lower limit liquid level, the PLC programmable controller 51 controls each valve assembly 44 to close.

[0057] The valve assembly 44 may be an electric valve (not shown). The electric valve is connected to the corresponding connecting pipe 43. The electric valve is electrically connected to the control unit 5, and is switched to an open state or a closed state under the control of the control unit 5, thereby adjusting the use state of the connecting pipe 43. The electric valve adopts a normally closed solenoid valve, which is in a closed state when not in use, so that the electric valve can adjust the state of the connecting pipe 43. The normally closed electric valve has a variety of specifications, which are not limited here.

[0058] It can be understood that the valve assembly 44 may also include a solenoid valve 441 and a pneumatic valve 442. In this case, the separation system 100 further includes an instrument air duct 45 and a bronchial tube 46, and both ends of the bronchial tube 46 are connected to the air inlet of the instrument air duct 45 and the air outlet of the solenoid valve 441. The instrument air duct 45 delivers gas to the solenoid valve 441 through the bronchial tube 46. When the solenoid valve 441 is opened under the control of the control unit 5, the gas is delivered to the pneumatic valve 442, causing the pneumatic valve 442 to actuate and open.

[0059] Specifically, the bronchial tube 46 connects the instrument air duct 45 and the corresponding electromagnetic valve 441, and the electromagnetic valve 441 is electrically connected to the control unit 5 and is switched on and off under the control of the control unit 5. The instrument air duct 45 is used to connect an external gas source, and the gas outlet of the instrument air duct 45 is connected to the bronchial tube 46, and is connected to the gas inlet of the electromagnetic valve 441 through the bronchial tube 46. The instrument air duct 45 inputs the gas in the gas source into each electromagnetic valve 441 through the bronchial tube 46, and the gas outlet of the electromagnetic valve 441 is connected to the gas inlet of the pneumatic valve 442 through the bronchial tube 46 to control the on and off of the pneumatic valve 442.

[0060] The pneumatic valve 442 is located between the solenoid valve 441 and the corresponding connecting pipe 43, and is connected to the connecting pipe 43. The pneumatic valve 442 opens and closes the connecting pipe 43 under the control of the solenoid valve 441, and the solenoid valve 441 is switched to an open state or a closed state under the control of the control unit 5.

[0061] When the solenoid valve 441 is switched to an open state under the control of the control unit 5, the air intake passage between the instrument air duct 45, the bronchial pipe 46 and the pneumatic valve 442 is open, and the gas in the air source enters the pneumatic valve 442 through the instrument air duct 45, the bronchial pipe 46 and the solenoid valve 441, so that the pneumatic valve 442 is in an open state, so that the connecting pipe 43 is in a flow state.

[0062] When the solenoid valve 441 is switched to a closed state under the control of the control unit 5, the air intake passage between the instrument air duct 45, the bronchial pipe 46 and the pneumatic valve 442 is closed, and the gas in the air source enters the solenoid valve 441 through the instrument air duct 45 and the bronchial pipe 46, but cannot enter the pneumatic valve 442, so that the pneumatic valve 442 is in a normally closed state, so that the connecting pipe 43 is in a disconnected state.

[0063] The pneumatic valve 442 is a normally closed pneumatic valve, which is switched to an open state in a ventilation state, thereby adjusting the connecting pipe 43 to a flow state. The normally closed pneumatic valve has a variety of specifications, which are not limited here.

[0064] The pneumatic valve 442 and the solenoid valve 441 are combined to jointly adjust the use state of the connecting pipe 43, reduce the complexity of the on-off structure of the connecting pipe 43, thereby reducing the cost of the on-off structure of the connecting pipe 43 and achieving double insurance of the connecting pipe 43.

[0065] In addition, when some connecting pipes 43 and the corresponding pneumatic valves 442 and solenoid valves 441 are damaged, the control unit 5 can adjust other connecting pipes 43 and the corresponding pneumatic valves 442 and solenoid valves 441 to replace the damaged parts and realize the normal operation of the sewage valve group 4.

[0066] It can be seen from the above technical solutions that the embodiments of the present invention have at least the following advantages and positive effects:

[0067] In the embodiment of the present invention, the first sewage pipe 41 is connected to the separator 1 and to one end of each connecting pipe 43, and the other end of each connecting pipe 43 is connected to the second sewage pipe 42. The multiple connecting pipes 43 do not affect each other and are independently output in the second sewage pipe 42. Each valve assembly 44 is used to control the on and off of the second sewage pipe 42. The liquid level detector 3 is used to detect the liquid level of solid and liquid impurities in the separator 1. The control unit 5 is electrically connected to the liquid level detector 3 and the valve assembly 44, so that the control unit 5 determines the number of valve assemblies 44 to be opened according to the liquid level signal detected by the liquid level detector 3, and controls the corresponding valve assembly 44 to be opened. Therefore, the separation system 100 of the present disclosure can determine the number of valve assemblies 44 to be opened according to the size of the wellhead gas flow rate, ensuring that the separated solid and liquid impurities can be quickly discharged from the separator 1, so that the separation system 100 can realize the processing of wellhead gas of each flow rate, improve the versatility of the separation system 100, avoid increasing the workload of the separator 1, and also avoid the problems of excessive discharge of impurities and slow discharge of impurities.

[0068] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A separation system, characterized in that: include: A separator is used to separate the wellhead gas and temporarily store the gas and solid and liquid impurities separated by the wellhead gas; the separator comprises a tank body, which is provided with an air inlet, an air outlet and a sewage outlet; the air outlet is arranged at the top end of the tank body; the sewage outlet is arranged at the bottom end of the tank body; The air inlet is located between the air outlet and the sewage outlet; an exhaust pipe, connected to the separator, for exhausting the gas; A liquid level detector, whose detection end is located in the separator, and is used to detect the liquid level of the solid and liquid impurities in the separator; A sewage valve group, comprising a first sewage pipe, a second sewage pipe, a plurality of connecting pipes and a plurality of valve components; the first sewage pipe is connected to the separator and to one end of each of the connecting pipes; the other end of each of the connecting pipes is connected to the second sewage pipe; Each of the valve assemblies is used to control the opening and closing of one of the connecting pipes; the first sewage pipe is provided with a first opening connected to the sewage outlet, and the first opening is located at one end of the first sewage pipe; the other end of the first sewage pipe is a sealed end; the second sewage pipe is provided with a second opening for discharging sewage outward, and the second opening is lower than the first opening in the height direction; the second opening is located at one end of the second sewage pipe; the other end of the second sewage pipe is a sealed end; The first sewage pipe is parallel to the second sewage pipe; The plurality of connecting pipes are arranged at intervals along the extending direction of the first sewage pipe, and the connecting pipes are parallel to each other; and A control unit is electrically connected to the liquid level detector and each of the valve assemblies; the control unit determines the number of the valve assemblies opened according to the liquid level signal received from the liquid level detector, and controls the corresponding number of the valve assemblies to open, so that the separation system can adjust the sewage discharge amount according to the liquid level, and when some connecting pipes and valve assemblies are damaged, the control unit can adjust other connecting pipes and corresponding valve assemblies to achieve normal operation of the sewage valve group.

2. The separation system according to claim 1, characterized in that The valve assembly is an electric valve, and the electric valve is connected to the corresponding connecting pipe; the electric valve is switched to an open state or a closed state under the control of the control unit.

3. The separation system according to claim 2, characterized in that The electric valve is a normally closed solenoid valve.

4. The separation system according to claim 1, characterized in that The valve assembly comprises a solenoid valve and a pneumatic valve, the solenoid valve is electrically connected to the control unit, and the solenoid valve has an air inlet and an air outlet; The separation system further includes an instrument air duct and a bronchial pipe for air intake, the two ends of the bronchial pipe are connected to the air outlet of the instrument air duct and the air inlet of the solenoid valve, and the air outlet of the solenoid valve is connected to the air inlet of the pneumatic valve to control the on and off of the pneumatic valve; The pneumatic valve is connected to the connecting pipe to control the on and off of the connecting pipe.

5. The separation system according to claim 4, characterized in that The pneumatic valve is a normally closed pneumatic valve.

6. The separation system according to claim 1, characterized in that The connecting pipe is connected to the second sewage pipe in a downwardly inclined manner from the first sewage pipe.

7. The separation system according to claim 1, characterized in that The control unit is an electrical control box, which has a built-in PLC programmable controller.

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