Device and system for treating and recycling fracturing flow-back fluid

Abstract

The invention relates to the technical field of fracturing fluid recovery treatment, in particular to a fracturing flow-back fluid treatment and reuse device and system.The device is characterized in that a supporting assembly comprises a mover, a supporting frame, a treatment shell and a discharging pump, the mover is arranged at the bottom of the supporting frame, the treatment shell is fixed to the supporting frame, and the discharging pump is connected with a discharging opening of the treatment shell; the liquid feeding device and the medicine adding device are arranged on the treatment shell, the screening and filtering assembly comprises a driving air cylinder, a screening plate and a cleaner, the driving air cylinder is fixed to the treatment shell, the screening plate is located in the treatment shell and connected with the output end of the driving air cylinder, the cleaner is arranged below the screening plate, and the centrifugal separation assembly comprises a centrifugal barrel, a connecting rod and a centrifugal motor; the centrifugal barrel is rotationally arranged in the treatment shell, the connecting rod is connected with the centrifugal barrel, the output end of the centrifugal motor is connected with the connecting rod, and the cleaner is used for cleaning the centrifugal barrel. And residual impurities on the sieve plate and the centrifugal barrel can be cleaned more conveniently, so that the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fracturing fluid recovery and treatment, and in particular to a device and system for fracturing flowback fluid treatment and reuse. Background Art

[0002] In oil and gas field fracturing operations, flowback fluid refers to the fluid that partially returns to the surface after the fracturing fluid injected into the formation during hydraulic fracturing completes its fracture-forming task, following the closure of the fractures and the initial stages of well production. This fluid contains not only the original fracturing fluid components (such as water, proppants, and chemical additives), but may also carry minerals, salts, hydrocarbons, and other contaminants dissolved from the formation.

[0003] In the reuse treatment of fracturing fluid, impurities in the fracturing fluid need to be cleaned. Generally, a filter is used to filter the impurities. However, after a period of filtration, the filter efficiency is reduced due to the accumulation of impurities. At this time, the filter needs to be removed for cleaning, which increases working time and reduces processing efficiency. Summary of the Invention

[0004] The object of the present invention is to provide a device and system for treating and reusing fracturing flowback fluid, which is intended to more conveniently clean impurities remaining on the sieve plate and the centrifugal barrel, thereby improving work efficiency.

[0005] To achieve the above-mentioned objectives, in the first aspect, the present invention provides a device for processing and reusing fracturing return fluid, including a support assembly, a liquid inlet, a doser, a screening assembly and a centrifugal separation assembly, the support assembly including a mover, a support frame, a processing shell and a discharge pump, the mover is arranged at the bottom of the support frame, the processing shell is fixed on the support frame, and the discharge pump is connected to the discharge port of the processing shell; the liquid inlet and the doser are arranged on the processing shell, the screening assembly includes a driving cylinder, a sieve plate and a cleaner, the driving cylinder is fixed on the processing shell, the sieve plate is located in the processing shell and is connected to the output end of the driving cylinder, the cleaner is arranged below the sieve plate, the centrifugal separation assembly includes a centrifugal bucket, a connecting rod and a centrifugal motor; the centrifugal bucket is rotatably arranged in the processing shell, the connecting rod is connected to the centrifugal bucket, the output end of the centrifugal motor is connected to the connecting rod, and the cleaner is used to clean the centrifugal bucket.

[0006] Among them, the device for treating and reusing the fracturing return fluid also includes a membrane filtration component and a deep treatment unit. The membrane filtration component is used to remove colloids and fine particles; the deep treatment unit is used to degrade organic matter through an ozone oxidizer and use an activated carbon adsorption tower to decolorize and remove residual pollutants.

[0007] Wherein, the processing shell includes a shell, a cleaning cover and a handle. The cleaning cover is rotatably arranged on one side of the shell. The handle is fixedly connected to the cleaning cover and is located on one side of the cleaning cover.

[0008] Wherein, the processing shell further includes a sealing ring, and the sealing ring is located on one side of the cleaning cover.

[0009] Wherein, the screening component further includes a stirrer, and the stirrer is used to mix the reagent and the return liquid.

[0010] Wherein, the agitator includes a ring gear, a driving gear, a driving motor and a stirring blade. The ring gear is rotatably arranged above the sieve plate, the driving gear is engaged with the ring gear, the output end of the driving motor is connected to the driving gear, and the stirring blade is fixed on the ring gear.

[0011] Wherein, the cleaner includes a cleaning rod, a cleaning brush and a bottom plate, the cleaning rod is fixed below the screen plate, the bottom plate is fixedly connected to the cleaning rod and is located at the bottom of the cleaning rod, and the cleaning brush is arranged on the bottom plate for cleaning the centrifugal bucket.

[0012] The cleaning brush includes a brush body, a triangular block and an elastic member. The triangular block is slidably arranged on the bottom plate. The brush body is fixed on the side of the triangular block close to the centrifugal bucket. The elastic member is arranged between the triangular block and the bottom plate. When the cleaning rod moves upward, the bottom plate pushes the triangular block to slide outward so that the brush body and the centrifugal bucket are in contact.

[0013] Wherein, a receiving groove is provided on the bottom plate, and a plurality of drainage holes are provided in the receiving groove.

[0014] In a second aspect, the present invention further provides a system for treating and reusing fracturing flowback fluid, comprising the aforementioned device for treating and reusing fracturing flowback fluid.

[0015] The present invention provides a device and system for treating and reusing fracturing flowback fluid. The support assembly serves as the basic structure of the entire device, carrying and moving the fluid. A mover is mounted at the bottom of the support frame, facilitating flexible transfer of the entire device between different work sites. The support frame is used to secure and support other functional components. A treatment shell is mounted on the support frame, housing a screening assembly and a centrifugal separation assembly, serving as the primary location for fluid treatment. A discharge pump is connected to the discharge port of the treatment shell to deliver the treated fluid to a designated container or reuse system.

[0016] The liquid inlet is set above the treatment shell and is used to introduce the fracturing return fluid into the device for treatment; the doser is also installed on the treatment shell. Its function is to add corresponding chemical agents to the liquid during the treatment process to adjust the pH value, promote the precipitation of suspended matter or remove harmful substances, thereby improving the treatment effect.

[0017] The sieve assembly, located inside the treatment shell, primarily removes large particles from the liquid. It consists of a drive cylinder, a sieve plate, and a cleaner. The drive cylinder is fixed to the outside of the treatment shell, with its output connected to the sieve plate. The reciprocating motion of the cylinder drives the plate to vibrate, enhancing filtration efficiency and preventing clogging. The sieve plate, positioned horizontally within the treatment shell, intercepts larger solid impurities.

[0018] The centrifugal separation assembly further refines the liquid, removing fine particles and suspended matter. The centrifugal bucket is rotatably mounted within the processing housing and connected to the output of the centrifugal motor via a connecting rod. When the motor is activated, it drives the connecting rod, which in turn causes the centrifugal bucket to spin at high speed. Centrifugal force then throws solids from the liquid to the bucket wall, achieving efficient liquid-solid separation. The device also features a cleaner for cleaning the inside of the centrifugal bucket after it stops operating, preventing residue from affecting the next use.

[0019] To sum up, the fracturing return fluid treatment and reuse device provided by the present invention can achieve efficient treatment and resource utilization of fracturing return fluid through the coordinated cooperation of various components. It has the advantages of compact structure, convenient operation, and good treatment effect. It is suitable for oil fields, shale gas extraction and other fields, and has broad prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural diagram of a device for treating and reusing fracturing flowback fluid according to the present invention.

[0022] Figure 2 This is a first cross-sectional structural diagram of a device for treating and reusing fracturing flowback fluid according to the present invention.

[0023] Figure 3 yes Figure 2 A partial enlargement of detail A.

[0024] Figure 4This is a second cross-sectional structural diagram of a device for treating and reusing fracturing flowback fluid according to the present invention.

[0025] Support assembly 101, liquid inlet 102, doser 103, screening assembly 104, centrifugal separation assembly 105, mover 106, support frame 107, processing shell 108, discharge pump 109, drive cylinder 110, sieve plate 111, cleaner 112, membrane filtration assembly 113, deep processing unit 114, shell 115, cleaning cover 116, handle 117, sealing ring 118, gear ring 119, drive gear 120, drive motor 121, stirring blade 122, cleaning rod 123, cleaning brush 124, bottom plate 125, brush body 126, triangular block 127, elastic member 128, accommodating groove 129, centrifugal barrel 130, connecting rod 131, centrifugal motor 132. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "length," "width," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, in the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

[0028] First embodiment

[0029] See also Figures 1 to 4The present invention provides a device for treating and reusing fracturing flowback fluid, comprising a support assembly 101, a liquid inlet 102, a doser 103, a screening assembly 104 and a centrifugal separation assembly 105, wherein the support assembly 101 comprises a mover 106, a support frame 107, a processing shell 108 and a discharge pump 109, wherein the mover 106 is arranged at the bottom of the support frame 107, the processing shell 108 is fixed on the support frame 107, and the discharge pump 109 is connected to the discharge port of the processing shell 108; the liquid inlet 102 and the doser 103 are arranged on the processing shell 108, the screening assembly 104 comprises a driving cylinder 110, The sieve plate 111 and the cleaner 112, the driving cylinder 110 is fixed on the processing shell 108, the sieve plate 111 is located in the processing shell 108 and is connected to the output end of the driving cylinder 110, the cleaner 112 is arranged below the sieve plate 111, the centrifugal separation assembly 105 includes a centrifugal bucket 130, a connecting rod 131 and a centrifugal motor 132; the centrifugal bucket 130 is rotatably arranged in the processing shell 108, the connecting rod 131 is connected to the centrifugal bucket 130, the output end of the centrifugal motor 132 is connected to the connecting rod 131, and the cleaner 112 is used to clean the centrifugal bucket 130.

[0030] In this embodiment, support assembly 101 serves as the basic structure of the entire device, carrying and moving the device. Mover 106 is located at the bottom of support frame 107, facilitating flexible transfer of the entire device between different work sites. Support frame 107 is used to secure and support other functional components. Processing shell 108 is mounted on support frame 107 and houses filtration assembly 104 and centrifugal separation assembly 105, serving as the primary location for liquid processing. A discharge pump 109 is connected to the discharge port of processing shell 108 to deliver the treated liquid to a designated container or reuse system.

[0031] The liquid inlet 102 is arranged above the treatment shell 108 and is used to introduce the fracturing return fluid into the device for treatment; the doser 103 is also installed on the treatment shell 108. Its function is to add corresponding chemical agents to the liquid during the treatment process to adjust the pH value, promote the precipitation of suspended matter or remove harmful substances, etc., thereby improving the treatment effect.

[0032] The filtration assembly 104, located within the processing housing 108, is primarily used to initially remove large impurities from the liquid. This assembly comprises a drive cylinder 110, a sieve plate 111, and a cleaner 112. Drive cylinder 110 is fixed to the exterior of the processing housing 108, with its output end connected to sieve plate 111. The reciprocating motion of the cylinder drives sieve plate 111 to vibrate, enhancing filtration efficiency and preventing clogging. Sieve plate 111 is positioned horizontally within the processing housing 108 to intercept larger solid impurities.

[0033] The centrifugal separation assembly 105 is used to further finely separate the liquid, removing fine particles and suspended matter. A centrifugal bucket 130 is rotatably mounted within the processing housing 108 and connected to the output of a centrifugal motor 132 via a connecting rod 131. When the motor is activated, it drives the connecting rod 131 to rotate, which in turn causes the centrifugal bucket 130 to spin at high speed. Centrifugal force then forces solid matter from the liquid to the bucket wall, achieving efficient liquid-solid separation. Furthermore, the device includes a cleaner 112 specifically for cleaning the interior of the centrifugal bucket 130 after it stops operating, preventing residue from affecting the next use.

[0034] To sum up, the fracturing return fluid treatment and reuse device provided by the present invention can achieve efficient treatment and resource utilization of fracturing return fluid through the coordinated cooperation of various components. It has the advantages of compact structure, convenient operation, and good treatment effect. It is suitable for oil fields, shale gas extraction and other fields.

[0035] The device for treating and reusing the fracturing flowback fluid also includes a membrane filtration component 113 and a deep treatment unit 114. The membrane filtration component 113 is used to remove colloids and fine particles; the deep treatment unit 114 is used to degrade organic matter through an ozone oxidizer and use an activated carbon adsorption tower to decolorize and remove residual pollutants.

[0036] The membrane filtration component 113 is arranged after the centrifugal separation component 105 as a key link for further fine processing. This component is mainly used to remove colloidal substances, fine particles and some soluble organic matter that still remain in the liquid after the previous treatment, thereby significantly improving the clarity and transparency of the liquid. The membrane filtration component 113 includes high-efficiency filtration media such as ultrafiltration membrane (UF) or microfiltration membrane (MF), which has the characteristics of uniform pore size distribution, high retention efficiency, and strong anti-pollution ability. The component adopts cross-flow or dead-end filtration mode to operate, which can effectively prevent the membrane surface from being blocked and can maintain its flux stability through regular backwashing. The membrane filtration process does not require the addition of chemical agents. It is a physical separation method that is environmentally friendly and energy-saving. It is suitable for occasions with high requirements for water turbidity, suspended solids (SS), color and other indicators.

[0037] In order to further remove the refractory organic pollutants, odorous substances and trace harmful components in the liquid, the device is also equipped with a deep treatment unit 114. This unit mainly consists of two parts: an ozone oxidizer and an activated carbon adsorption tower:

[0038] Ozone oxidizers are used to decompose organic pollutants in liquids through the powerful oxidizing effect of ozone. Ozone can destroy the molecular structure of organic matter, particularly effectively removing toxic and difficult-to-degrade organic compounds such as benzene rings, phenols, and halogenated hydrocarbons. It also has a sterilizing and disinfecting effect. Ozone oxidation, with its rapid reaction speed and zero secondary pollution, is a commonly used technology in advanced oxidation processes (AOPs).

[0039] The activated carbon adsorption tower, located after the ozone oxidizer, absorbs trace organic matter, pigments, odorants, and other soluble contaminants remaining after oxidation treatment, further improving the sensory quality and safety of the effluent. Activated carbon has a large specific surface area and rich microporous structure, resulting in strong adsorption capacity and a wide range of applications. Once saturated with adsorption, its activity can be restored through a regeneration system, enabling recycling and reducing operating costs.

[0040] The processing shell 108 includes a shell body 115, a cleaning cover 116 and a handle 117. The cleaning cover 116 is rotatably arranged on one side of the shell body 115. The handle 117 is fixedly connected to the cleaning cover 116 and is located on one side of the cleaning cover 116.

[0041] The processing housing 108 further includes a sealing ring 118 , which is located on one side of the cleaning cover 116 .

[0042] Shell 115, the main component of processing housing 108, is made of high-strength, corrosion-resistant engineering materials. It possesses excellent mechanical strength and chemical stability, capable of withstanding long-term use under certain pressures and complex operating conditions. Shell 115 houses multiple functional chambers, housing the filtration assembly 104 and centrifugal separation assembly 105. Pipes or openings between these chambers allow for orderly flow of liquid, ensuring the continuity and efficiency of the entire processing process.

[0043] Cleaning cover 116 is pivotally mounted on one side of housing 115 and is typically hingedly connected to housing 115. This openable design facilitates regular inspection, cleaning, and maintenance of the interior of processing housing 108. This facilitates manual or automated cleaning of areas prone to debris accumulation, such as the filter assembly 104 and centrifuge bucket 130, to prevent impurity accumulation from impacting equipment efficiency or causing blockages. Cleaning cover 116 is typically constructed of corrosion-resistant sheet material, ensuring excellent sealing and structural stability.

[0044] The handle 117 is fixedly connected to one side of the cleaning cover 116 and is located on its outer surface to facilitate the operator to open and close the cover.

[0045] A sealing ring 118 is positioned at one edge of the cleaning cover 116 and is embedded in a dedicated groove. When the cleaning cover 116 is closed and tightly fitted to the housing 115, the sealing ring 118 is compressed and deformed, forming a reliable sealing interface and effectively preventing liquid from leaking through the gap between the cover and the housing 115. The sealing ring 118 is typically made of a corrosion-resistant and aging-resistant elastic material (such as silicone rubber, fluororubber, or EPDM) to maintain good sealing performance and service life in a variety of operating environments.

[0046] The screening assembly 104 further includes a stirrer, which is used to mix the medicine and the return fluid.

[0047] The agitator achieves efficient mixing of the reagent and the flowback liquid, improving the reaction efficiency of the subsequent treatment process. The agitator has a novel structural design and stable operation, ensuring that the reagent is evenly dispersed in the liquid, thereby enhancing the flocculation, sedimentation or chemical reaction effect.

[0048] The agitator includes a ring gear 119, a driving gear 120, a driving motor 121 and a stirring blade 122. The ring gear 119 is rotatably arranged above the sieve plate 111, the driving gear 120 is engaged with the ring gear 119, the output end of the driving motor 121 is connected to the driving gear 120, and the stirring blade 122 is fixed on the ring gear 119.

[0049] The ring gear 119 is an annular structure, rotatably arranged above the sieve plate 111, and located at an appropriate position inside the processing shell 108. The ring gear 119 serves as a support structure for the rotation of the stirring blade 122, and its inner side is provided with meshing teeth so as to cooperate with the drive gear 120 to realize power transmission. The drive gear 120 is meshed with the ring gear 119 and is installed on the output shaft of the drive motor 121, receiving power from the motor and transmitting it to the ring gear 119, driving the entire stirring system to operate. The drive motor 121 is fixedly mounted on the outside of the processing shell 108 or on a bracket, and its output end is connected to the drive gear 120. The motor provides a power source for the agitator, and the speed range can be set according to process requirements to achieve flexible control of the stirring intensity. The motor has good waterproof and dustproof properties and is suitable for working environments containing corrosive liquids and dust. The stirring blade 122 is fixed on the ring gear 119 and rotates synchronously with the ring gear 119. Made of corrosion-resistant materials, the blades are designed in a paddle or spiral shape, effectively promoting liquid flow and ensuring thorough contact and mixing between the reagent and the return fluid. The number and distribution angle of the blades can be optimized based on mixing efficiency to achieve the best mixing effect.

[0050] The cleaner 112 includes a cleaning rod 123, a cleaning brush 124 and a bottom plate 125. The cleaning rod 123 is fixed below the sieve plate 111. The bottom plate 125 is fixedly connected to the cleaning rod 123 and is located at the bottom of the cleaning rod 123. The cleaning brush 124 is arranged on the bottom plate 125 for cleaning the centrifugal bucket 130.

[0051] The cleaning rod 123 is fixedly mounted below the sieve plate 111 and serves as a supporting framework for the entire cleaner 112, moving up and down with the sieve plate 111. One end of the cleaning rod 123 is connected to the sieve plate 111, and the other end extends downward and is fixedly connected to the base plate 125 to form a stable structural frame.

[0052] The bottom plate 125 is located at the bottom of the cleaning rod 123 and is vertically connected to the cleaning rod 123, serving as a mounting base for the cleaning brush 124. The bottom plate 125 is flat or has a certain curvature to adapt to the outer contour of the centrifugal bucket 130, ensuring that the brush body 126 can effectively fit the bucket wall during the cleaning process.

[0053] The cleaning brush 124 is arranged on the bottom plate 125 and is a functional component that directly contacts and cleans the centrifugal bucket 130. The number of the cleaning brushes 124 can be reasonably arranged according to the size and shape of the centrifugal bucket 130 to achieve all-round cleaning without dead angles.

[0054] When the driving cylinder 110 drives the sieve plate 111 to move upward, the cleaning rod 123 simultaneously drives the bottom plate 125 to move upward, thereby driving the cleaning brush 124 to clean the side wall of the centrifugal bucket 130, so that the centrifugal bucket 130 can be cleaned conveniently.

[0055] The cleaning brush 124 includes a brush body 126, a triangular block 127 and an elastic member 128. The triangular block 127 is slidably arranged on the bottom plate 125. The brush body 126 is fixed on the side of the triangular block 127 close to the centrifugal bucket 130. The elastic member 128 is arranged between the triangular block 127 and the bottom plate 125. When the cleaning rod 123 moves upward, the bottom plate 125 pushes the triangular block 127 to slide outward so that the brush body 126 and the centrifugal bucket 130 are in contact.

[0056] The brush body 126 is made of a corrosion-resistant and wear-resistant flexible material (such as nylon, polypropylene, etc.) and is fixed to the side of the triangular block 127 close to the centrifugal bucket 130 to scrape off solid residues and sticky substances attached to the inner wall of the centrifugal bucket 130. The triangular block 127 is slidably set in the slide groove or guide rail of the base plate 125 and can slide freely in the horizontal direction. When the cleaning rod 123 rises, the base plate 125 moves upward and pushes the triangular block 127 to slide outward, so that the brush body 126 is close to the inner wall of the centrifugal bucket 130, forming an effective cleaning surface. The elastic member 128 is usually a compression spring or a rubber pad, which is arranged between the triangular block 127 and the base plate 125 to play a buffering and resetting role. When the cleaning action is completed, the elastic member 128 can push the triangular block 127 back to its initial position, so that the brush body 126 is separated from the centrifugal bucket 130, which is convenient for equipment reset and the next operation.

[0057] The bottom plate 125 is provided with a receiving groove 129 , and a plurality of drainage holes are provided in the receiving groove 129 .

[0058] To improve drainage efficiency during the cleaning process and prevent liquid accumulation on the bottom plate 125, which could impact cleaning effectiveness and equipment stability, the bottom plate 125 is provided with a receiving groove 129, within which are multiple drainage holes. The receiving groove 129, located centrally on the bottom plate 125 or distributed along the brush body 126, collects wastewater and impurities generated during the cleaning process, preventing splashing and secondary contamination. Drain holes are evenly distributed across the bottom of the receiving groove 129 and connect to the drainage system within the treatment housing 108, rapidly discharging wastewater to an external water collection tank or recovery pipe.

[0059] Second embodiment

[0060] The present invention also provides a system for treating and reusing fracturing flowback fluid, comprising the device for treating and reusing fracturing flowback fluid.

[0061] The present invention also provides a system for processing and reusing fracturing flowback fluid. This system, based on the aforementioned fracturing flowback fluid processing and reuse device as its core processing unit, further integrates multiple auxiliary function modules and a control system to automate the entire process of fracturing flowback fluid processing, from collection, pretreatment, deep purification, to final reuse or discharge compliance. This system boasts a compact structure, stable operation, and intelligent operation, effectively addressing the environmental pollution and water resource waste associated with the large amounts of flowback fluid generated during fracturing operations, and offers significant environmental and economic benefits.

[0062] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A device for treating and reusing fracturing flowback fluid, characterized in that: The invention comprises a supporting assembly, a liquid inlet, a doser, a screening assembly and a centrifugal separation assembly, wherein the supporting assembly comprises a mover, a supporting frame, a processing shell and a discharge pump, the mover is arranged at the bottom of the supporting frame, the processing shell is fixed on the supporting frame, and the discharge pump is connected to the discharge port of the processing shell; the liquid inlet and the doser are arranged on the processing shell, the screening assembly comprises a driving cylinder, a sieve plate and a cleaner, the driving cylinder is fixed on the processing shell, the sieve plate is located in the processing shell and is connected to the output end of the driving cylinder, the cleaner is arranged below the sieve plate, the centrifugal separation assembly comprises a centrifugal bucket, a connecting rod and a centrifugal motor; the centrifugal bucket is rotatably arranged in the processing shell, the connecting rod is connected to the centrifugal bucket, the output end of the centrifugal motor is connected to the connecting rod, and the cleaner is used to clean the centrifugal bucket.

2. The device for treating and reusing fracturing flowback fluid according to claim 1, characterized in that: The device for treating and reusing fracturing flowback fluid also includes a membrane filtration component and a deep treatment unit. The membrane filtration component is used to remove colloids and fine particles; the deep treatment unit is used to degrade organic matter through an ozone oxidizer and use an activated carbon adsorption tower to decolorize and remove residual pollutants.

3. The device for treating and reusing fracturing flowback fluid according to claim 2, characterized in that: The processing shell includes a shell, a cleaning cover and a handle. The cleaning cover is rotatably arranged on one side of the shell. The handle is fixedly connected to the cleaning cover and is located on one side of the cleaning cover.

4. The device for treating and reusing fracturing flowback fluid according to claim 3, characterized in that: The processing shell further includes a sealing ring, which is located on one side of the cleaning cover.

5. The device for treating and reusing fracturing flowback fluid according to claim 4, characterized in that: The screening assembly further comprises a stirrer, which is used to mix the medicine and the return liquid.

6. The device for treating and reusing fracturing flowback fluid according to claim 5, characterized in that: The agitator includes a ring gear, a driving gear, a driving motor and a stirring blade. The ring gear is rotatably arranged above the sieve plate, the driving gear is engaged with the ring gear, the output end of the driving motor is connected to the driving gear, and the stirring blade is fixed on the ring gear.

7. The device for treating and reusing fracturing flowback fluid according to claim 6, characterized in that: The cleaner includes a cleaning rod, a cleaning brush and a bottom plate. The cleaning rod is fixed below the sieve plate. The bottom plate is fixedly connected to the cleaning rod and is located at the bottom of the cleaning rod. The cleaning brush is arranged on the bottom plate for cleaning the centrifugal bucket.

8. The device for treating and reusing fracturing flowback fluid according to claim 7, characterized in that: The cleaning brush includes a brush body, a triangular block and an elastic member. The triangular block is slidably arranged on the bottom plate. The brush body is fixed on a side of the triangular block close to the centrifugal bucket. The elastic member is arranged between the triangular block and the bottom plate. When the cleaning rod moves upward, the bottom plate pushes the triangular block to slide outward so that the brush body contacts the centrifugal bucket.

9. The device for treating and reusing fracturing flowback fluid according to claim 8, characterized in that: The bottom plate is provided with a receiving groove, and a plurality of drainage holes are provided in the receiving groove.

10. A system for treating and reusing fracturing flowback fluid, characterized in that: The invention comprises a device for treating and reusing fracturing flowback fluid as claimed in any one of claims 1 to 9.

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