Oil and gas well fracturing flow-back fluid treatment device

Abstract

The utility model discloses an oil and gas well fracturing flow-back fluid treatment device, and belongs to the technical field of oil and gas fields. Comprising a chemical reaction tank and a flocculation reaction tank, the flocculation reaction tank is fixedly arranged in the chemical reaction tank in a sleeved mode, a centrifugal device and a medicine conveying assembly are installed on the chemical reaction tank and the flocculation reaction tank, the centrifugal device comprises a motor, the output end of the motor is in transmission connection with a stirring shaft, the stirring shaft movably penetrates through the flocculation reaction tank, and the medicine conveying assembly is arranged on the stirring shaft. The oil and gas well fracturing flow-back fluid can achieve the one-way conveying effect, is subjected to oil-water separation and centrifugal treatment through the oil-water separator in sequence, and is subjected to coagulating sedimentation and chemical reaction treatment in the flocculation reaction tank and the chemical reaction tank respectively, so that harmful substances and pollutants in the oil and gas well fracturing flow-back fluid are effectively removed, the suck-back phenomenon can be prevented, and the oil and gas well fracturing flow-back fluid can be recycled. Repeated treatment work is avoided, harmless and pollution-free oil and gas well fracturing flow-back fluid can be recycled to the maximum extent, and the recycling efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of oil and gas fields, and more specifically, to a device for processing fracturing flowback fluid of oil and gas wells. Background Art

[0002] In the process of oil and gas production, liquid is injected into the formation through fracturing technology to increase cracks, thereby promoting the flow of oil and gas and improving the recovery rate. After the fracturing fluid is injected into the formation, part of the liquid will flow back to the surface to form fracturing flowback fluid. The fracturing flowback fluid of oil and gas wells may contain chemicals used in the fracturing process, groundwater, and underground crude oil and other components. When recovering these oil and gas well fracturing flowback fluids, it is necessary to effectively remove and treat the chemicals, groundwater, and underground crude oil and other components contained in them to achieve the purpose of harmless and pollution-free recovery. The current oil and gas well fracturing flowback fluid treatment device has the problem that physical treatment and chemical treatment equipment cannot be effectively combined, and a long transmission pipeline is used to combine oil-water separation, physical precipitation and chemical treatment process, which has a high investment cost. The oil and gas well fracturing flowback fluid is prone to repeated invalid treatment processes, resulting in low treatment efficiency and insufficient recovery effect. In view of this, we propose an oil and gas well fracturing flowback fluid treatment device. Utility Model Content

[0003] 1. Technical problems to be solved

[0004] The purpose of the present application is to provide an oil and gas well fracturing flowback fluid processing device, which solves the technical problems in the above-mentioned background technology and realizes the one-way transportation effect of the oil and gas well fracturing flowback fluid, which is successively separated from oil and water by an oil-water separator, centrifuged, and subjected to coagulation sedimentation and chemical reaction treatment in a flocculation reaction tank and a chemical reaction tank, respectively, so as to effectively remove harmful substances and pollutants therein, prevent back suction, avoid repeated processing work, and maximize the recovery of harmless and pollution-free oil and gas well fracturing flowback fluid, thereby improving the technical effect of recovery efficiency.

[0005] 2. Technical solution

[0006] The technical solution of the present application provides an oil and gas well fracturing return fluid processing device, comprising: a chemical reaction tank and a flocculation reaction tank, the flocculation reaction tank is fixedly sleeved inside the chemical reaction tank, a centrifugal device and a drug delivery component are installed on the chemical reaction tank and the flocculation reaction tank, the centrifugal device comprises a motor, the output end of the motor is transmission-connected with a stirring shaft, the stirring shaft movably penetrates the flocculation reaction tank and extends into the chemical reaction tank, the stirring shaft is located in the chemical reaction tank and the flocculation reaction tank and is transmission-connected with a plurality of first stirring blades and a second stirring blade, the drug delivery component comprises a main drug delivery pipe and an auxiliary drug delivery pipe, the main drug delivery pipe and A shut-off valve is rotatably installed on the auxiliary drug delivery pipes, the main drug delivery pipe and the auxiliary drug delivery pipe are fixedly connected with the chemical reaction tank and the flocculation reaction tank respectively, the flocculation reaction tank is connected with a liquid inlet device, a connecting pipe is connected between the flocculation reaction tank and the chemical reaction tank, the liquid inlet device includes a liquid inlet pump, the liquid inlet pump is fixedly connected with a liquid suction pipe and a liquid outlet pipe, the liquid suction pipe is detachably connected with an oil-water separator, the liquid outlet pipe and the connecting pipe are both connected with an anti-back suction device, the liquid outlet pipe is connected to the flocculation reaction tank through the corresponding anti-back suction device, the anti-back suction device at the bottom of the connecting pipe is arranged inside the chemical reaction tank, and a discharge pump is installed at the bottom of the chemical reaction tank.

[0007] By adopting the above technical scheme, the oil and gas well fracturing return fluid is filtered to remove water through the oil-water separator, the liquid inlet pump draws the oil and gas well fracturing return fluid from the oil-water separator through the liquid suction pipe, and first enters the flocculation reaction tank through the liquid outlet pipe, the stop valve on the auxiliary drug delivery pipe is opened, and the pump equipment can be used to deliver flocculant to the flocculation reaction tank to flocculate the oil and gas well fracturing return fluid. After filtering, the oil and gas well fracturing return fluid is delivered to the inside of the chemical reaction tank through the connecting pipe, and then the stop valve on the auxiliary drug delivery pipe is closed, the stop valve of the main drug delivery pipe is opened, and the oxidant, neutralizer and other reaction agents are delivered to the inside of the chemical reaction tank. Treat pollutants and realize chemical reactions to remove harmful substances and pollutants. At the same time, the output end of a motor in the centrifugal device uses a stirring shaft to synchronously drive multiple first stirring blades and second stirring blades in the chemical reaction tank and the flocculation reaction tank to rotate, which can realize centrifugal treatment and achieve the purpose of uniform stirring. It can also realize flocculation precipitation and sufficient chemical reaction treatment, and then use a drainage pump to discharge harmless and pollution-free oil and gas well fracturing return fluid. The anti-backflow device connected to the chemical reaction tank and the flocculation reaction tank can prevent backflow, maximize the recovery of harmless and pollution-free oil and gas well fracturing return fluid, and improve recovery efficiency.

[0008] Optionally, a filter plate is detachably installed inside the flocculation reaction tank, and the filter plate is lower than the upper port of the connecting pipe.

[0009] By adopting the above technical scheme, the oil and gas well fracturing return fluid entering the flocculation reaction tank is first flocculated and then transported to the chemical reaction tank through the connecting pipe. Before entering the chemical reaction tank, it can be filtered through the filter plate inside the flocculation reaction tank.

[0010] Optionally, the motor is fixedly connected with a flange, and the flange is installed on the upper surface of the flocculation reaction tank by bolt threads.

[0011] By adopting the above technical solution, when the motor is installed, a plurality of bolts can be threadedly connected between the flange and the flocculation reaction tank to achieve limiting processing, so that the motor can work stably.

[0012] Optionally, the liquid outlet pipe is fixedly sleeved with the chemical reaction tank, and the bottom end of the liquid outlet pipe extends into the interior of the chemical reaction tank and is connected to an anti-backflow device.

[0013] By adopting the above technical solution, the liquid outlet pipe is fixedly connected to the chemical reaction tank, so that the liquid inlet pump can be stably installed, and the bottom end of the liquid outlet pipe is located inside the chemical reaction tank and connected to the anti-backflow device, which can effectively prevent backflow.

[0014] Optionally, the anti-backsuction device includes a connecting pipe, one of the anti-backsuction devices is threadedly connected to the liquid outlet pipe through the connecting pipe, and the other anti-backsuction device is threadedly connected to the connecting pipe through the connecting pipe, the connecting pipe is fixedly connected to a mounting column, four circular holes are provided at the upper end of the mounting column, an inner cavity is provided in the mounting column, the inner cavity is connected to the connecting pipe through the circular holes, a conical seat is slidably installed in the inner cavity, a spring is fixedly connected between the conical seat and the inner cavity, and a filter cover is threadedly connected to the mounting column.

[0015] By adopting the above technical scheme, the liquid inlet pump can extract the oil and gas well fracturing return fluid from the oil-water separator, and transport it unidirectionally from the flocculation reaction tank to the chemical reaction tank. The unidirectional pressure of the transported fluid forces the spring to deform, causing the conical seat to slide along the inner cavity, so that an effective flow channel is generated between the conical seat and the inner cavity, and it can be filtered through the filter cover. If the liquid inlet pump stops working and the unidirectional pressure of the fluid disappears, the conical seat will be reset under the action of the spring reset, that is, the inner cavity will be closed, thereby realizing the function of preventing back suction.

[0016] Optionally, the oil-water separator includes a shell, the shell is threadedly sleeved with the liquid suction pipe, a filter element is detachably installed in the shell, and the bottom end of the shell is fixedly connected to a liquid inlet pipe.

[0017] By adopting the above technical solution, the oil and gas well fracturing return fluid can enter the shell, and the oil and water separation treatment is achieved through the filter element, thereby reducing the water content of the oil and gas well fracturing return fluid entering the flocculation reaction tank.

[0018] Optionally, the liquid discharge pump is fixedly connected to a liquid suction pipe and a liquid discharge pipe, and the liquid suction pipe is fixedly connected to a chemical reaction tank.

[0019] By adopting the above technical solution, the drainage pump recovers harmless and pollution-free oil and gas well fracturing return fluid from the inside of the chemical reaction tank through the liquid suction pipe.

[0020] 3. Beneficial effects

[0021] One or more technical solutions provided in the technical solution of the present application have at least the following technical effects or advantages: the oil and gas well fracturing return fluid can achieve a one-way transportation effect, and is successively separated from the oil and water by an oil-water separator, centrifuged, and subjected to coagulation sedimentation and chemical reaction treatment in a flocculation reaction tank and a chemical reaction tank, respectively, so as to effectively remove harmful substances and pollutants therein, prevent backflow, avoid repeated processing work, and maximize the recovery of harmless and pollution-free oil and gas well fracturing return fluid, thereby improving recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of an oil and gas well fracturing flowback fluid processing device disclosed in a preferred embodiment of the present application;

[0023] Figure 2 This is a schematic structural diagram of a centrifugal device, a liquid inlet device and a drug delivery component of an oil and gas well fracturing flowback fluid processing device disclosed in a preferred embodiment of the present application;

[0024] Figure 3 A preferred embodiment of the present application discloses an oil and gas well fracturing return fluid processing device Figure 2 The enlarged structural diagram at A in the middle;

[0025] Figure 4 A schematic diagram of the structure of a back-sucking preventer of an oil and gas well fracturing flowback fluid processing device disclosed in a preferred embodiment of the present application;

[0026] Explanation of the numbers in the figure: 1. Chemical reaction tank; 2. Flocculation reaction tank; 21. Filter plate; 3. Centrifugal device; 31. Motor; 32. Flange; 33. Stirring shaft; 34. First stirring blade; 35. Second stirring blade; 4. Liquid inlet device; 41. Liquid inlet pump; 42. Liquid suction pipe; 43. Liquid outlet pipe; 5. Oil-water separator; 51. Shell; 52. Liquid inlet pipe; 53. Filter element; 6. Connecting pipe; 7. Anti-backflow device; 71. Connecting pipe; 72. Mounting column; 721. Round hole; 722. Inner cavity; 73. Conical seat; 74. Spring; 75. Filter cover; 8. Liquid discharge pump; 81. Liquid suction pipe; 82. Liquid discharge pipe; 9. Drug delivery component; 91. Main drug delivery pipe; 92. Auxiliary drug delivery pipe; 93. Stop valve. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings.

[0028] Reference Figures 1 to 4 The embodiment of the present application provides an oil and gas well fracturing return fluid processing device, comprising: a chemical reaction tank 1 and a flocculation reaction tank 2, wherein the flocculation reaction tank 2 is fixedly sleeved inside the chemical reaction tank 1, and a centrifugal device 3 and a drug delivery component 9 are installed on the chemical reaction tank 1 and the flocculation reaction tank 2, wherein the centrifugal device 3 comprises a motor 31, and the output end of the motor 31 is connected to a stirring shaft 33 in a transmission manner, wherein the stirring shaft 33 movably penetrates the flocculation reaction tank 2 and extends to the inside of the chemical reaction tank 1, wherein the stirring shaft 33 is located in the chemical reaction tank 1 and the flocculation reaction tank 2 and is respectively connected to a plurality of first stirring blades 34 and second stirring blades 35 in a transmission manner, and the drug delivery component 9 comprises a main drug delivery pipe 91 and an auxiliary drug delivery pipe 92. Drug pipe 92, the main drug delivery pipe 91 and the auxiliary drug delivery pipe 92 are both rotatably installed with a stop valve 93, the main drug delivery pipe 91 and the auxiliary drug delivery pipe 92 are respectively fixedly connected with the chemical reaction tank 1 and the flocculation reaction tank 2, the flocculation reaction tank 2 is connected with a liquid inlet device 4, the flocculation reaction tank 2 and the chemical reaction tank 1 are connected with a connecting pipe 6, the liquid inlet device 4 includes a liquid inlet pump 41, the liquid inlet pump 41 is fixedly connected with a liquid suction pipe 42 and a liquid outlet pipe 43, the liquid suction pipe 42 is detachably connected with an oil-water separator 5, the liquid outlet pipe 43 and the connecting pipe 6 are both connected with an anti-backflow device 7, the liquid outlet pipe 43 is connected to the flocculation reaction tank 2 through the corresponding anti-backflow device 7, the bottom of the connecting pipe 6 The anti-backflow device 7 is arranged inside the chemical reaction tank 1, and a drainage pump 8 is installed at the bottom of the chemical reaction tank 1. The oil and gas well fracturing return fluid is filtered out of water through the oil-water separator 5, and the inlet pump 41 draws the oil and gas well fracturing return fluid from the oil-water separator 5 through the suction pipe 42, and first enters the flocculation reaction tank 2 through the outlet pipe 43. The stop valve 93 on the auxiliary drug delivery pipe 92 is opened, and the pump equipment can be used to transport flocculants to the flocculation reaction tank 2 to flocculate the oil and gas well fracturing return fluid. After filtering, the oil and gas well fracturing return fluid is transported to the inside of the chemical reaction tank 1 through the connecting pipe 6, and then the stop valve 93 on the auxiliary drug delivery pipe 92 is closed, the stop valve 93 on the main drug delivery pipe 91 is opened, and the chemical reaction tank is supplied with a flocculant. 1 is used to transport oxidants, neutralizers and other reactions inside to treat pollutants and realize chemical reactions to remove harmful substances and pollutants therein. At the same time, the output end of a motor 31 in the centrifugal device 3 uses a stirring shaft 33 to synchronously drive multiple first stirring blades 34 and second stirring blades 35 in the chemical reaction tank 1 and the flocculation reaction tank 2 to rotate, which can realize centrifugal treatment and achieve the purpose of uniform stirring. It can also realize flocculation precipitation and sufficient chemical reaction treatment, and then use the drainage pump 8 to discharge harmless and pollution-free oil and gas well fracturing return fluid. The anti-backflow device 7 connected to the chemical reaction tank 1 and the flocculation reaction tank 2 can prevent backflow, maximize the recovery of harmless and pollution-free oil and gas well fracturing return fluid, and improve the recovery efficiency.

[0029] Reference Figure 1 and Figure 2 A filter plate 21 is detachably installed inside the flocculation reaction tank 2 , and the filter plate 21 is lower than the upper end of the connecting pipe 6 .

[0030] By adopting the above technical solution, the oil and gas well fracturing return fluid entering the flocculation reaction tank 2 is first flocculated and then transported to the chemical reaction tank 1 through the connecting pipe 6. Before entering the chemical reaction tank 1, it can be filtered through the filter plate 21 inside the flocculation reaction tank 2.

[0031] Optionally, the motor 31 is fixedly connected to a flange 32 , and the flange 32 is threadably mounted on the upper surface of the flocculation reaction tank 2 via bolts.

[0032] By adopting the above technical solution, when the motor 31 is installed, a plurality of bolts can be threadedly connected between the flange 32 and the flocculation reaction tank 2 to achieve position limiting processing, so that the motor 31 can work stably.

[0033] Optionally, the liquid outlet pipe 43 is fixedly sleeved with the chemical reaction tank 1 , and the bottom end of the liquid outlet pipe 43 extends into the interior of the chemical reaction tank 1 and is connected to the anti-backflow device 7 .

[0034] By adopting the above technical solution, the liquid outlet pipe 43 is fixedly connected to the chemical reaction tank 1, so that the liquid inlet pump 41 can be stably installed, and the bottom end of the liquid outlet pipe 43 is located inside the chemical reaction tank 1 and connected to the anti-backflow device 7, which can effectively prevent backflow.

[0035] Optionally, the anti-backflow device 7 includes a connecting pipe 71, one of the anti-backflow devices 7 is threadedly connected to the liquid outlet pipe 43 through the connecting pipe 71, and the other anti-backflow device 7 is threadedly connected to the connecting pipe 6 through the connecting pipe 71, and the connecting pipe 71 is fixedly connected to a mounting column 72, and four circular holes 721 are provided at the upper end of the mounting column 72, and an inner cavity 722 is provided in the mounting column 72, and the inner cavity 722 is connected to the connecting pipe 71 through the circular holes 721, and a conical seat 73 is slidably installed in the inner cavity 722, and a spring 74 is fixedly connected between the conical seat 73 and the inner cavity 722, and a filter cover 75 is threadedly connected to the mounting column 72.

[0036] By adopting the above technical scheme, the liquid inlet pump 41 can extract the oil and gas well fracturing return fluid from the oil-water separator 5, and transport it unidirectionally from the flocculation reaction tank 2 to the chemical reaction tank 1. The unidirectional pressure of the transported fluid forces the spring 74 to deform, causing the conical seat 73 to slide along the inner cavity 722, so that an effective flow channel is generated between the conical seat 73 and the inner cavity 722, and it can be filtered through the filter cover 75. If the liquid inlet pump 41 stops working and the unidirectional pressure of the fluid disappears, the conical seat 73 will be reset under the resetting action of the spring 74, that is, the inner cavity 722 will be closed, thereby realizing the function of preventing back suction.

[0037] Optionally, the oil-water separator 5 includes a shell 51 , the shell 51 is threadedly sleeved with the liquid suction tube 42 , a filter element 53 is detachably installed in the shell 51 , and a liquid inlet pipe 52 is fixedly connected to the bottom end of the shell 51 .

[0038] By adopting the above technical solution, the oil and gas well fracturing return fluid can enter the shell 51 and be separated from the oil and water by the filter element 53, thereby reducing the water content of the oil and gas well fracturing return fluid entering the flocculation reaction tank 2.

[0039] Optionally, the liquid discharge pump 8 is fixedly connected to a liquid extraction pipe 81 and a liquid discharge pipe 82 , and the liquid extraction pipe 81 is fixedly connected to the chemical reaction tank 1 .

[0040] By adopting the above technical solution, the drainage pump 8 recovers harmless and pollution-free oil and gas well fracturing flowback fluid from the inside of the chemical reaction tank 1 through the liquid extraction pipe 81 .

[0041] Working principle: The oil and gas well fracturing return fluid is filtered out of water through the oil-water separator 5, and the liquid inlet pump 41 extracts the oil and gas well fracturing return fluid from the oil-water separator 5 through the liquid suction pipe 42, and first enters the flocculation reaction tank 2 through the liquid outlet pipe 43, and the stop valve 93 on the auxiliary drug delivery pipe 92 is opened, and the pump equipment can be used to deliver flocculants to the flocculation reaction tank 2 to flocculate the oil and gas well fracturing return fluid. After filtering, the oil and gas well fracturing return fluid is delivered to the chemical reaction tank 1 through the connecting pipe 6, and then the stop valve 93 on the auxiliary drug delivery pipe 92 is closed, the stop valve 93 on the main drug delivery pipe 91 is opened, and the oxidant, neutralizer and other reactants are delivered to the chemical reaction tank 1. The pollutants should be treated and chemical reactions should be achieved to remove harmful substances and pollutants therein. At the same time, the output end of a motor 31 in the centrifugal device 3 uses a stirring shaft 33 to synchronously drive the chemical reaction tank 1 and the flocculation reaction tank 2 to rotate multiple first stirring blades 34 and second stirring blades 35, which can realize centrifugal treatment and achieve the purpose of uniform stirring. Flocculation precipitation and sufficient chemical reaction treatment can be achieved, and then the drainage pump 8 is used to discharge harmless and pollution-free oil and gas well fracturing return fluid. The anti-backflow device 7 connected to the chemical reaction tank 1 and the flocculation reaction tank 2 can prevent backflow, maximize the recovery of harmless and pollution-free oil and gas well fracturing return fluid, and improve the recovery efficiency.

Claims

1. An oil and gas well fracturing flowback fluid processing device, characterized in that: The invention comprises: a chemical reaction tank (1) and a flocculation reaction tank (2), wherein the flocculation reaction tank (2) is fixedly sleeved inside the chemical reaction tank (1), wherein the chemical reaction tank (1) and the flocculation reaction tank (2) are provided with a centrifugal device (3) and a drug delivery component (9), wherein the centrifugal device (3) comprises a motor (31), wherein the output end of the motor (31) is drivingly connected to a stirring shaft (33), wherein the stirring shaft (33) movably penetrates the flocculation reaction tank (2) and extends into the chemical reaction tank (1), wherein the stirring shaft (33) is located inside the chemical reaction tank (1) and the flocculation reaction tank (2) and is respectively drivingly connected to a plurality of first stirring blades (34) and a second stirring blade (35), wherein the drug delivery component (9) comprises a main drug delivery tube (91) and an auxiliary drug delivery tube (92), wherein both the main drug delivery tube (91) and the auxiliary drug delivery tube (92) are rotatably provided with a stop valve (91). 3), the main drug delivery pipe (91) and the auxiliary drug delivery pipe (92) are fixedly connected to the chemical reaction tank (1) and the flocculation reaction tank (2), respectively; the flocculation reaction tank (2) is connected to a liquid inlet device (4); a connecting pipe (6) is connected between the flocculation reaction tank (2) and the chemical reaction tank (1); the liquid inlet device (4) comprises a liquid inlet pump (41); the liquid inlet pump (41) is fixedly connected to a liquid suction pipe (42) and a liquid outlet pipe (43); the liquid suction pipe (42) is detachably connected to an oil-water separator (5); the liquid outlet pipe (43) and the connecting pipe (6) are both connected to an anti-backflow device (7); the liquid outlet pipe (43) is connected to the flocculation reaction tank (2) via the corresponding anti-backflow device (7); the anti-backflow device (7) at the bottom end of the connecting pipe (6) is arranged inside the chemical reaction tank (1); and a liquid discharge pump (8) is installed at the bottom end of the chemical reaction tank (1).

2. The oil and gas well fracturing flowback fluid processing device according to claim 1, characterized in that: A filter plate (21) is detachably mounted inside the flocculation reaction tank (2), and the filter plate (21) is lower than the upper end of the connecting pipe (6).

3. The oil and gas well fracturing flowback fluid processing device according to claim 1, characterized in that: The motor (31) is fixedly connected to a flange (32), and the flange (32) is installed on the upper surface of the flocculation reaction tank (2) through bolt threads.

4. The oil and gas well fracturing flowback fluid processing device according to claim 1, characterized in that: The liquid outlet pipe (43) is fixedly sleeved with the chemical reaction tank (1), and the bottom end of the liquid outlet pipe (43) extends into the interior of the chemical reaction tank (1) and is connected to the back-sucking prevention device (7).

5. The oil and gas well fracturing flowback fluid processing device according to claim 4, characterized in that: The anti-backflow device (7) comprises a connecting pipe (71), one of the anti-backflow devices (7) is threadedly connected to the liquid outlet pipe (43) through the connecting pipe (71), and the other anti-backflow device (7) is threadedly connected to the connecting pipe (6) through the connecting pipe (71). The connecting pipe (71) is fixedly connected to a mounting column (72), and four circular holes (721) are provided at the upper end of the mounting column (72). An inner cavity (722) is provided in the mounting column (72), and the inner cavity (722) is connected to the connecting pipe (71) through the circular holes (721). A conical seat (73) is slidably installed in the inner cavity (722), and a spring (74) is fixedly connected between the conical seat (73) and the inner cavity (722), and a filter cover (75) is threadedly connected to the mounting column (72).

6. The oil and gas well fracturing flowback fluid processing device according to claim 1, characterized in that: The oil-water separator (5) comprises a shell (51), the shell (51) is threadedly sleeved with a liquid suction pipe (42), a filter element (53) is detachably installed in the shell (51), and the bottom end of the shell (51) is fixedly connected to a liquid inlet pipe (52).

7. The oil and gas well fracturing flowback fluid processing device according to claim 1, characterized in that: The liquid discharge pump (8) is fixedly connected to a liquid extraction pipe (81) and a liquid discharge pipe (82), and the liquid extraction pipe (81) is fixedly connected to the chemical reaction tank (1).

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