Oil and gas field waste liquid treatment filter system

Abstract

The invention provides an oil gas filtering system, which relates to the technical field of oil gas treatment equipment and specifically comprises a medium filter and a hydraulic mechanism, the medium filter comprises a main body, a filter material and a pressing plate; the liquid inlet, the oil outlet, the air outlet and the water outlet are communicated with the filtering chamber, the liquid inlet is formed in the top of the main body, and the oil outlet and the water outlet are formed in the bottom of the main body; the filter material is arranged in the filter chamber, is an oil-absorbing hydrophobic filter material and is of a soft porous sponge structure; the pressing plate is arranged in the main body and is positioned in the filtering chamber; the hydraulic mechanism is in transmission connection with the pressing plate to drive the pressing plate to move towards the filter material to extrude the filter material. The oil-absorbing and water-filtering filter material in the embodiment can selectively absorb oil-containing wastewater, so that waste oil is absorbed in the filter material, the wastewater can be discharged through the water outlet after passing through the filter material, waste gas can be discharged out of the main body through the gas outlet, and after oil absorption reaches saturation, oil can be discharged in a manner of extruding the filter material through the pressing plate; therefore, stable emission of oil, water and gas is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas processing equipment, and in particular to an oil and gas filtering system. Background Art

[0002] At present, the oil removal devices for low-concentration oil content in oil and gas field waste liquid treatment filters generally use walnut shells, quartz sand, dual-media and modified fiber ball treatment filters. The basic filtering principle is to temporarily retain the oil in the water on the filter material or on the water surface to form floating oil through interception, sedimentation and adsorption. The pollutants can be quickly removed by draining the oil or backwashing.

[0003] In the Bohai Bay, such as Qinhuangdao, Caofeidian and other oil (gas) fields, waste liquid treatment uses three-phase separation and water treatment filter production equipment. Although this process is relatively mature and the oil treatment effect in waste liquid is relatively good, the current filters use quartz sand, anthracite and walnut shells as filter materials. Due to the large amount of gas in the influent water, the oil content in the effluent water, the exhaust effect and the oil discharge effect are all unstable, which can easily cause the filtering operation to fail. Summary of the invention

[0004] The purpose of the present invention is to provide an oil and gas filtration system to alleviate the technical problems in the prior art that the oil content in the inlet water is large, the exhaust effect and the oil discharge effect are unstable, and the filtration operation is easily failed.

[0005] The oil and gas filtration system provided by the present invention comprises: a media filter and a hydraulic mechanism; the media filter comprises a main body, filter material and a pressure plate; the main body has a filter chamber and a liquid inlet, an oil outlet, a gas outlet and a water outlet connected to the filter chamber, the liquid inlet is arranged at the top of the main body, and the oil outlet and the water outlet are arranged at the bottom of the main body; the filter material is arranged in the filter chamber, the filter material is an oil-absorbing and hydrophobic filter material, and is a soft porous sponge structure; the pressure plate is arranged in the main body and located in the filter chamber; the hydraulic mechanism is transmission-connected to the pressure plate to drive the pressure plate to move toward the filter material to squeeze the filter material.

[0006] Furthermore, a bearing portion is provided in the filter chamber; the bearing portion is used to contain and fix the filter material; the pressing plate is provided on the top of the bearing portion, and the pressing plate can move in a vertical direction.

[0007] Furthermore, the filter material is a graphene-based oil-absorbing sponge.

[0008] Furthermore, the oil and gas filtration system also includes a pre-filter device; the pre-filter device includes an inlet pipe, a temperature transmitter, a first flow meter, an inlet pump and a coarse filter; one end of the inlet pipe is used to connect to an inlet pool storing oil wastewater, and the other end is connected to the inlet end of the coarse filter; the temperature transmitter, the first flow meter, and the inlet pump are all arranged on the inlet pipe; the liquid outlet end of the coarse filter is connected to the liquid inlet.

[0009] Furthermore, the pre-filter device also includes a first valve body; the first valve body is arranged at the liquid outlet or the liquid inlet of the coarse filter.

[0010] Furthermore, the oil and gas filtration system also includes a wastewater pipeline; the wastewater pipeline includes a drain pipe, a pressure transmitter, a second valve body and a second flow meter; one end of the drain pipe is connected to the water outlet, and the other end is used to connect to the water outlet pool; the pressure transmitter, the second valve body and the second flow meter are all arranged on the drain pipe.

[0011] Furthermore, the wastewater pipeline also includes a sewage pipe and a third valve body; one end of the sewage pipe is connected to the water outlet, and the other end is used to connect to the sewage pool; the third valve body is arranged on the sewage pipe.

[0012] Furthermore, the oil and gas filtration system also includes a waste oil pipeline; the waste oil pipeline includes an oil drain pipe, a third flow meter, a fourth valve body and an oil drain pump; one end of the oil drain pipe is connected to the oil outlet, and the other end is used to connect to the waste oil pool; the third flow meter, the fourth valve body and the oil drain pump are all arranged on the oil drain pipe.

[0013] Furthermore, the oil and gas filtering system also includes a backwashing device; the bottom of the main body is also provided with a backwashing port connected to the filter chamber, and the backwashing device is connected to the backwashing port.

[0014] Furthermore, the backwashing device includes a water washing component and an air intake component; the water washing component is used to inject washing water into the filter chamber; the air intake component is used to inject compressed air into the filter chamber.

[0015] Beneficial effects:

[0016] The oil and gas filtering system provided by the present invention includes a medium filter and a hydraulic mechanism; the medium filter includes a main body, filter material and a pressing plate; the main body has a filter chamber and a liquid inlet, an oil outlet, an air outlet and a water outlet connected to the filter chamber, the liquid inlet is arranged at the top of the main body, and the oil outlet and the water outlet are arranged at the bottom of the main body; the filter material is arranged in the filter chamber, the filter material is an oil-absorbing and hydrophobic filter material, and is a soft porous sponge structure; the pressing plate is arranged in the main body and located in the filter chamber; the hydraulic mechanism is transmission-connected to the pressing plate to drive the pressing plate to move toward the filter material to squeeze the filter material.

[0017] Specifically, in the present invention, oily wastewater is passed into the filter chamber through the liquid inlet of the main body, the oil-absorbing and water-filtering filter material can selectively adsorb the oily wastewater, and the porous sponge structure can increase the oil absorption speed, so that the waste oil is adsorbed in the filter material, and the wastewater can be discharged through the water outlet after passing through the filter material. At the same time, the waste gas can be discharged to the outside of the main body through the gas outlet. Moreover, since the filter material is a soft porous sponge structure, after the oil absorption reaches saturation, the oil can be discharged by squeezing the filter material through a pressure plate, thereby realizing the stable discharge of oil, water and gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the connection relationship of the oil and gas filtration system provided by an embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of a media filter provided in an embodiment of the present invention.

[0021] icon:

[0022] 100- medium filter; 110- main body; 111- liquid inlet; 112- oil outlet; 113- air outlet; 114- water outlet; 115- bearing plate; 116- inspection hole; 117- delivery port; 118- sampling port; 119- sewage pipe; 120- pressing plate; 200- hydraulic mechanism; 300- pre-filter device; 310- temperature transmitter; 320- first flow meter; 330- liquid inlet pump; 340- coarse filter; 350- first valve body; 400- wastewater pipeline; 410- pressure transmitter; 420- second valve body; 430- second flow meter; 440- third valve body; 500- waste oil pipeline; 510- third flow meter; 520- oil discharge pump; 530- fourth valve body; 610- water washing assembly; 620- air inlet assembly; 700- air outlet pipe. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0030] See also Figure 1 , Figure 2 The oil and gas filtering system provided in this embodiment includes a medium filter 100 and a hydraulic mechanism 200.

[0031] The media filter 100 includes a main body 110, filter material and a pressing plate 120. The main body 110 has a filter chamber and a liquid inlet 111, an oil outlet 112, an air outlet 113 and a water outlet 114 connected to the filter chamber. The liquid inlet 111 is arranged at the top of the main body 110, and the oil outlet 112 and the water outlet 114 are arranged at the bottom of the main body 110. The filter material is arranged in the filter chamber, and the filter material is an oil-absorbing and hydrophobic filter material, and has a soft porous sponge structure. The pressing plate 120 is arranged in the main body 110 and is located in the filter chamber. The hydraulic mechanism 200 is transmission-connected to the pressing plate 120 to drive the pressing plate 120 to move toward the filter material to squeeze the filter material.

[0032] Specifically, the oily wastewater is introduced into the filter chamber through the liquid inlet 111 of the main body 110, the oil-absorbing and water-filtering filter material can selectively absorb the oily wastewater, and the porous sponge structure can increase the oil absorption speed, so that the waste oil is absorbed in the filter material.

[0033] After the oily wastewater is filtered by the filter material, the wastewater formed after filtration can pass through the filter material and then be discharged through the water outlet 114, and at the same time, the waste gas can be discharged to the outside of the main body 110 through the gas outlet 113. In addition, since the filter material is a soft porous sponge structure, after the oil absorption reaches saturation, the oil can be discharged by squeezing the filter material through the pressing plate 120, thereby realizing the stable discharge of oil, water and gas.

[0034] In addition, in this embodiment, the air outlet 113 is disposed at the top of the main body 110 to prevent the liquid in the filter chamber from flowing out of the main body 110 from the air outlet 113 when the liquid level is high. The air outlet 113 is connected to the air outlet pipe 700, and the exhaust gas is discharged to the exhaust pipe 700 through the air outlet 113 and then discharged to the exhaust gas treatment device for exhaust gas treatment.

[0035] In addition, it should be noted that the main body 110 in this embodiment is also provided with an inspection hole 116 and a sampling port 118. The inspection hole 116 is opposite to the filter chamber and has a sealing flange at the opening, which is used for maintenance personnel to open and inspect and maintain the filter chamber main body 110. The sampling port 118 is provided at the top of the main body 110, the sampling port 118 is connected to the filter chamber, and the sampling port 118 is provided with a valve body, so that the staff can open the valve body to sample and observe and detect the sewage in the filter chamber.

[0036] In this embodiment, a bearing part is provided in the filter chamber. The bearing part is used to hold and fix the filter material. A pressing plate 120 is provided on the top of the bearing part, and the pressing plate 120 can move in the vertical direction.

[0037] The supporting part in this embodiment is arranged near the bottom of the filter chamber, specifically a supporting plate 115 extending in the horizontal direction. Auxiliary holes are arranged on the supporting plate 115 so that the wastewater after being filtered by the filter material can fall to the bottom of the filter chamber through the auxiliary holes, and then be discharged from the filter chamber through the water outlet 114.

[0038] Among them, the filter material in this embodiment is arranged on the supporting plate 115, and the pressing plate 120 is arranged above the filter material. When the filter material is saturated with oil, the liquid inlet 111 can be closed, and the hydraulic mechanism 200 can be controlled to drive the pressing plate 120 to press the filter material down. The pressing plate 120 and the supporting plate 115 squeeze the filter material, thereby squeezing out the waste oil adsorbed by the filter material and discharging it out of the filter chamber through the oil outlet 112.

[0039] In this embodiment, the filter material is a graphene-based oil-absorbing sponge.

[0040] The graphene-based oil-absorbing sponge has an extremely high adsorption rate and can absorb crude oil 90 times its own weight. It also has a fast adsorption rate and can absorb a large amount of oil in a short period of time. This sponge is highly selective for oil substances and can efficiently absorb oil substances, but does not absorb non-oil substances such as water, which makes it very effective in treating oil-water mixtures. In addition. The graphene-based oil-absorbing sponge can be recycled many times, has good reusability, and is not prone to hardening or wormholes. In this embodiment, after absorbing the oil to saturation, the oil can be discharged by extrusion, and after the oil is discharged, it can be used again for oil-water separation, thereby reducing the cost of use.

[0041] In this embodiment, a delivery port 117 is also disposed on the upper portion of the main body 110, and a sealing flange is disposed on the delivery port 117. The delivery port 117 is located higher than the carrier plate 115, and the delivery port 117 faces the top surface of the carrier plate 115. When the filter material is delivered to the filter chamber, the sealing flange at the delivery port 117 is opened to deliver the graphene-based oil-absorbing sponge to the filter chamber, which is simple to operate and very convenient and labor-saving.

[0042] In this embodiment, the oil and gas filtration system further includes a pre-filter device 300. The pre-filter device 300 includes a liquid inlet pipe, a temperature transmitter 310, a first flow meter 320, a liquid inlet pump 330 and a coarse filter 340. One end of the liquid inlet pipe is used to connect to a water inlet pool storing oil wastewater, and the other end is connected to the liquid inlet end of the coarse filter 340. The temperature transmitter 310, the first flow meter 320, and the liquid inlet pump 330 are all arranged on the liquid inlet pipe. The liquid outlet end of the coarse filter 340 is connected to the liquid inlet port 111.

[0043] The pre-filter device 300 can perform coarse filtration on the oily wastewater to filter out solid impurities in the oily wastewater, thereby preventing the solid impurities from entering the medium filter 100 and causing the filter material of the soft porous sponge structure to be blocked.

[0044] Specifically, the inlet pipe, under the action of the inlet pump 330, sucks the oily wastewater in the water inlet pool into the coarse filter 340 for coarse filtration. The temperature transmitter 310 can measure the inlet temperature and convert the temperature signal into a standard electrical signal so that the staff can detect the inlet temperature. The flow meter in this embodiment can measure the instantaneous flow in the pipeline so that the staff can check the current inlet flow.

[0045] In this embodiment, the pre-filter device 300 further includes a first valve body 350 . The first valve body 350 is disposed at the liquid outlet or liquid inlet 111 of the coarse filter 340 .

[0046] The first valve body 350 is used to control the liquid inlet to ensure that the oily wastewater can be stopped from flowing into the filter chamber when the oil is extruded.

[0047] In this embodiment, the oil and gas filtration system further includes a wastewater pipeline 400. The wastewater pipeline 400 includes a drain pipe, a pressure transmitter 410, a second valve body 420 and a second flow meter 430. One end of the drain pipe is connected to the water outlet 114, and the other end is used to connect to the water outlet pool. The pressure transmitter 410, the second valve body 420 and the second flow meter 430 are all arranged on the drain pipe.

[0048] Specifically, the wastewater pipeline 400 in this embodiment is used to discharge wastewater generated after filtering and separating the filter media.

[0049] Among them, after the drain pipe is connected to the water outlet 114 and the water outlet pool, the wastewater discharged from the water outlet 114 can be discharged to the drain pool. The pressure transmitter 410 can measure the water pressure in the drain pipe, and convert the pressure into a pneumatic signal or an electric signal for control and remote transmission, so that the staff can check the drainage status. The second valve body 420 can realize the opening and closing control of the drain pipe. When draining oil, the drain pipe can be closed by controlling the second valve body 420 to prevent waste oil from flowing into the water outlet pool through the drain pipe during the oil discharge process. Correspondingly, the second flowmeter 430 can detect the instantaneous flow of water in the drain pipe.

[0050] In this embodiment, the wastewater pipeline 400 further includes a sewage pipe 119 and a third valve body 440. The sewage pipe 119 is connected to the water outlet 114 at one end and is used to connect to the sewage pool at the other end. The third valve body 440 is arranged on the sewage pipe 119.

[0051] Specifically, when the media filter 100 fails, or the filter material needs to be backwashed after long-term use, or when the main body 110 needs to be inspected and maintained, the liquid in the filter chamber needs to be completely discharged before operation. At this time, there may be unfiltered oily wastewater in the filter chamber. If the unfiltered wastewater in the filter chamber is discharged into the wastewater pool, it is easy to cause pollution. The second valve body 420 can be closed and the third valve body 440 can be opened to discharge the wastewater into the wastewater pool to empty the filter chamber, so as to achieve the emptying of the filter chamber.

[0052] In this embodiment, the oil and gas filtration system further includes a waste oil pipeline 500. The waste oil pipeline 500 includes an oil drain pipe, a third flow meter 510, a fourth valve body 530 and an oil drain pump 520. One end of the oil drain pipe is connected to the oil outlet 112, and the other end is used to connect to the waste oil pool. The third flow meter 510, the fourth valve body 530 and the oil drain pump 520 are all arranged on the oil drain pipe.

[0053] The waste oil pipeline 500 is used to discharge the waste oil adsorbed by the filter material. After the filter material is saturated with adsorption, the filter material is squeezed by the pressure plate 120 to achieve oil discharge. At this time, the first valve body 350, the second valve body 420 and the third valve body 440 need to be closed, and the fourth valve body 530 needs to be opened so that the waste oil can be discharged to the waste oil pool through the oil discharge pipe. Accordingly, the third flow meter 510 can measure the waste oil flow in the oil discharge pipe, and the oil discharge pump 520 can achieve the suction of the waste oil to avoid the waste oil being difficult to discharge smoothly due to its high viscosity.

[0054] In this embodiment, the oil and gas filtering system further includes a backwashing device. A backwashing port communicating with the filter chamber is further provided at the bottom of the main body 110, and the backwashing device is connected to the backwashing port.

[0055] After the media filter 100 has been used for a long time, small impurities such as particles are easily adsorbed on the filter material, causing the small holes on the filter material to be blocked. At this time, the filter material can be backwashed through a backwashing device to remove impurities trapped in the filter material layer and suspended solids deposited on the surface, so that the filter material can restore its filtering capacity in a short time.

[0056] Specifically, the backwashing device in this embodiment is connected to the backwashing port. When backwashing is performed, the first valve body 350, the second valve body 420 and the third valve body 440 can be closed, and the second valve body 420 can be opened. The impurities generated by backwashing are discharged into the waste oil pool through the fourth valve body 530.

[0057] In this embodiment, the backwashing device includes a water washing assembly 610 and an air intake assembly 620. The water washing assembly 610 is used to inject washing water into the filter chamber. The air intake assembly 620 is used to inject compressed air into the filter chamber.

[0058] Among them, the water washing component 610 in this embodiment can realize the surface flushing of the filter material. In this embodiment, a fixed water jet system is specifically used to flush the surface layer of the filter material. The filter material surface is flushed by the water jet system to remove blockages and restore the filtering capacity of the filter material.

[0059] In addition, in this embodiment, in addition to the water washing component 610, an air intake component 620 is also provided, and the air intake component 620 can realize air flushing of the filter material. Specifically, in this embodiment, the filter material is first disturbed by compressed air through the air intake component 620, so that the filter materials collide and rub against each other to form shear force, thereby peeling off the sludge attached to the surface of the filter material and suspending the sludge in the water, and then the water washing component 610 is used for backwashing to remove the dirt from the pool.

[0060] It should be noted that the water washing assembly 610 and the air intake assembly 620 in this embodiment can be used separately to achieve single water washing or single air washing of the media filter 100 .

[0061] In addition, it should be noted that the oil and gas filtration system provided in this embodiment also includes a controller. The controller is signal-connected to the first valve body 350, the temperature transmitter 310, the first flow meter 320, the liquid inlet pump 330, the pressure transmitter 410, the second valve body 420, the second flow meter 430, the third flow meter 510, the third valve body 440, the fourth valve body 530, the oil drain pump 520, the water washing component 610 and the air intake component 620, so as to realize the individual control of each component.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil and gas filtration system, characterized in that: include: A media filter (100) and a hydraulic mechanism (200); The media filter (100) comprises a main body (110), filter material and a pressing plate (120); The main body (110) comprises a filter chamber and a liquid inlet (111), an oil outlet (112), an air outlet (113) and a water outlet (114) which are in communication with the filter chamber; the liquid inlet (111) is arranged at the top of the main body (110), and the oil outlet (112) and the water outlet (114) are arranged at the bottom of the main body (110); The filter material is arranged in the filter chamber, and the filter material is an oil-absorbing and hydrophobic filter material, and has a soft porous sponge structure; The pressing plate (120) is arranged in the main body (110) and located in the filter chamber; The hydraulic mechanism (200) is transmission-connected to the pressing plate (120) to drive the pressing plate (120) to move toward the filter material to squeeze the filter material.

2. The oil and gas filtration system according to claim 1, characterized in that: A bearing portion is provided in the filter chamber; The bearing portion is used to hold and fix the filter material; The pressing plate (120) is arranged on the top of the bearing portion, and the pressing plate (120) is movable in a vertical direction.

3. The oil and gas filtration system according to claim 1 or 2, characterized in that: The filter material is a graphene-based oil-absorbing sponge.

4. The oil and gas filtration system according to claim 1, characterized in that: The oil and gas filtering system further comprises a pre-filtering device (300); The pre-filter device (300) comprises a liquid inlet pipe, a temperature transmitter (310), a first flow meter (320), a liquid inlet pump (330) and a coarse filter (340); One end of the liquid inlet pipe is used to connect to a water inlet pool storing oily wastewater, and the other end is connected to a liquid inlet end of the coarse filter (340); The temperature transmitter (310), the first flow meter (320), and the liquid inlet pump (330) are all arranged on the liquid inlet pipe; The liquid outlet end of the coarse filter (340) is connected to the liquid inlet (111).

5. The oil and gas filtration system according to claim 4, characterized in that: The pre-filter device (300) further includes a first valve body (350); The first valve body (350) is arranged at the liquid outlet end of the coarse filter (340) or the liquid inlet (111).

6. The oil and gas filtration system according to claim 1, characterized in that: The oil and gas filtration system further includes a wastewater pipeline (400); The wastewater pipeline (400) includes a drain pipe, a pressure transmitter (410), a second valve body (420) and a second flow meter (430); One end of the drainage pipe is connected to the water outlet (114), and the other end is used to connect to the water outlet pool; The pressure transmitter (410), the second valve body (420) and the second flow meter (430) are all arranged on the drainage pipe.

7. The oil and gas filtration system according to claim 6, characterized in that: The wastewater pipeline (400) further includes a sewage pipe (119) and a third valve body (440); The sewage pipe (119) is connected to the water outlet (114) at one end, and the other end is used to connect to the sewage tank; The third valve body (440) is arranged on the sewage pipe (119).

8. The oil and gas filtration system according to claim 1, characterized in that: The oil and gas filtering system further comprises a waste oil pipeline (500); The waste oil pipeline (500) comprises an oil discharge pipe, a third flow meter (510), a fourth valve body (530) and an oil discharge pump (520); One end of the oil drain pipe is connected to the oil outlet (112), and the other end is used to connect to the waste oil pool; The third flow meter (510), the fourth valve body (530) and the oil discharge pump (520) are all arranged on the oil discharge pipe.

9. The oil and gas filtration system according to claim 1, characterized in that: The oil and gas filtration system also includes a backwashing device; The bottom of the main body (110) is also provided with a backwashing port communicating with the filter chamber, and the backwashing device is connected to the backwashing port.

10. The oil and gas filtration system according to claim 9, characterized in that: The backwashing device comprises a water washing component (610) and an air intake component (620); The water washing component (610) is used to inject washing water into the filter chamber; The air intake assembly (620) is used to inject compressed air into the filter chamber.

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