Fracturing fluid flowback treatment equipment

Abstract

The utility model discloses fracturing fluid flowback treatment equipment, and belongs to the technical field of fracturing fluid flowback treatment. Comprising a box body, the bottom of which is of an opening structure; the coarse filtering assembly is rotationally arranged in the box body and is used for filtering coarse particles of the flowback fluid; the fine filtering assembly is fixed in the box body and arranged below the coarse filtering assembly, and the fine filtering assembly is used for filtering fine particles of the flowback fluid subjected to coarse filtering; the filtrate flow guide assembly is fixed in the box body and is arranged below the fine filtering assembly; the knocking mechanism is rotationally arranged on the box body, and the knocking mechanism circularly knocks the fine filtering assembly; the liquid storage box is fixed above the box body, the bottom of the liquid storage box is connected with a flow guide pipe in a penetrating manner, and the flow guide pipe is arranged between the knocking mechanism and the coarse filtering assembly, so that the technical effects that mechanical automatic cleaning is realized, manual participation is not needed, the labor intensity of workers is reduced, the filtering assembly is ensured to be clean, and the cleaning efficiency is improved are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of fracturing flowback fluid treatment, and more specifically, to a fracturing fluid flowback treatment device. Background Art

[0002] Fracturing flowback fluid is generated during the exploitation of shale gas or tight oil, and contains complex pollutants such as a large amount of solid particles, organic compounds and salts. If these pollutants are directly discharged or reused without treatment, they will cause serious impacts on the environment, and at the same time will interfere with the subsequent production process. Large particle solid substances such as gravel and sediment, if directly entering the subsequent treatment equipment without preliminary filtration, are likely to cause equipment blockage or damage, increasing the maintenance cost and downtime. By preliminary filtration to remove gravel and sediment, the amount of sludge generated during the treatment process can be reduced, and the environmental pollution can be lowered.

[0003] After the flowback fluid filtration component has been filtering for a long time, it needs to be cleaned regularly. And manual cleaning of the filtration component requires checking each one and removing the gravel and sediment therein. The cleaning work usually requires workers to directly contact the filtration component, performing steps such as disassembly, cleaning and reinstallation. The labor intensity is high, and it is easy to cause fatigue and safety problems. This process is relatively time-consuming, especially when dealing with a large amount of fracturing flowback fluid, the efficiency is even lower.

[0004] In view of this, we propose a fracturing fluid flowback treatment device. Content of the Utility Model

[0005] Technical Problems to be Solved

[0006] The purpose of the utility model is to provide a fracturing fluid flowback treatment device, which solves the technical problems in the above background art, and realizes the technical effects of mechanical automatic cleaning, without manual participation, reducing the labor intensity of workers, ensuring the cleanliness of the filtration component, and improving the cleaning efficiency.

[0007] 2. Technical Solution

[0008] The technical solution of the utility model provides a fracturing fluid flowback treatment device, including:

[0009] A box body, the bottom of the box body is of an open structure;

[0010] A coarse filtration component, rotatably arranged in the box body for coarse particle filtration of the flowback fluid;

[0011] A fine filtration component, fixed in the box body and located below the coarse filtration component, the fine filtration component is used for fine particle filtration of the flowback fluid after coarse filtration;

[0012] A filtrate diversion component, fixed in the box body and located below the fine filtration component;

[0013] The knocking mechanism is rotationally arranged on the box body, and the knocking mechanism knocks the fine filtration component in a cycle.

[0014] The liquid storage tank is fixed above the box body. A diversion pipe is connected through the bottom of the liquid storage tank, and the diversion pipe is arranged between the knocking mechanism and the coarse filtration component.

[0015] As an alternative solution of the technical solution of this utility model document, the coarse filtration component includes a conveyor belt with a plurality of coarse filter holes formed on the surface, two roller shafts and a plurality of partition plates. The two roller shafts are rotatably connected in the box body. The conveyor belt is drivingly arranged on the two roller shafts. A plurality of partition plates are fixed on the outer surface of the conveyor belt. A reverse frustum-shaped impurity guide cover is connected through the bottom of the box body. The edge of the conveyor belt abuts against the inner wall of the box body.

[0016] As an alternative solution of the technical solution of this utility model document, the fine filtration component includes a fine filter plate and a feed pipe. The fine filter plate is arranged inside the conveyor belt. The fine filter plate is fixed in the box body. One end of the feed pipe is fixed to one side edge of the fine filter plate, and the other end of the feed pipe is connected through to the impurity guide cover.

[0017] As an alternative solution of the technical solution of this utility model document, the filtrate diversion component includes a diversion plate and a liquid outlet pipe. The diversion plate is arranged inside the conveyor belt. The diversion plate is arranged below the fine filter plate. One end of the liquid outlet pipe is fixed to the edge of the diversion plate.

[0018] As an alternative solution of the technical solution of this utility model document, the knocking mechanism includes a shaft rod, a dial plate, a spring and an impact ball. The shaft rod is rotatably connected to the box body. A plurality of dial plates are annularly distributed on the shaft rod. One end of the shaft rod penetrates through the box body. A plurality of springs are annularly distributed at the end of the shaft rod outside the box body. An impact ball is fixed to the end of the spring away from the shaft rod. An extension plate passing through the box body is fixed to the side edge of the fine filter plate close to the impact ball, and the extension plate is within the rotation radius of the impact ball.

[0019] As an alternative solution of the technical solution of this utility model document, both the diversion plate and the fine filter plate are inclined structures. The diversion plate and the fine filter plate are inclined in opposite directions. The liquid outlet pipe and the feed pipe are arranged on both sides of the box body.

[0020] As an alternative solution of the technical solution of this utility model document, the two side edges of the diversion plate abut against the roller shafts, and the two side edges of the fine filter plate abut against the roller shafts.

[0021] 3. Beneficial effects

[0022] One or more technical solutions provided in the embodiments of this utility model have at least the following technical effects or advantages:

[0023] 1. The utility model converts the potential energy of the flow-back fluid into kinetic energy by adding the flow-back fluid into the liquid storage tank, enhancing the fluidity and impact force of the liquid. During the flowing process, part of the flow-back fluid impacts the knocking mechanism, and part impacts on the coarse filtration component, enabling the coarse filtration component to cycle and filter, facilitating the automatic cleaning of large-particle interceptors. The knocking mechanism intermittently knocks the fine filtration component to increase the vibration of the fine filtration component, cleaning the fine particles intercepted on the upper surface of the fine filtration component. Through mechanical automatic cleaning, manual participation is not required, reducing the labor intensity of workers, ensuring the cleanliness of the filtration component, and improving the cleaning efficiency.

[0024] 2. The whole of the utility model does not require the cooperation of a power supply. By converting the potential energy of the flow-back fluid into kinetic energy and using the kinetic energy to drive the rotation of the coarse filtration component and the knocking mechanism, it is more energy-saving and environmentally friendly. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model Figure 1 The enlarged structural schematic diagram at position A in;

[0027] Figure 3 It is a schematic diagram of the overall side view structure of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0028] Figure 4 It is a schematic diagram of the overall transverse sectional structure of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0029] Figure 5 It is a schematic diagram of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model Figure 4 The enlarged structural schematic diagram at position B in;

[0030] Figure 6 It is a schematic diagram of the overall longitudinal sectional structure of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of the knocking mechanism structure of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0032] Figure 8 It is a schematic diagram of the partial structure of the coarse filtration component of a fracturing fluid flow-back treatment device disclosed in a preferred embodiment of the utility model;

[0033] Figure 9Schematic structural diagram of the fine filtration component of a fracturing fluid backflow treatment device disclosed in a preferred embodiment of the present utility model;

[0034] Figure 10 Schematic structural diagram of the filtrate diversion component of a fracturing fluid backflow treatment device disclosed in a preferred embodiment of the present utility model;

[0035] Explanation of the reference numerals in the figure: 1. Box body; 11. Impurity guide cover; 2. Coarse filtration component; 21. Conveyor belt; 211. Coarse filter holes; 22. Roller shaft; 23. Partition board; 3. Liquid storage tank; 31. Diversion pipe; 4. Fine filtration component; 41. Fine filter plate; 411. Extension plate; 42. Feed pipe; 5. Filtrate diversion component; 51. Diversion plate; 52. Liquid outlet pipe; 6. Knocking mechanism; 61. Shaft rod; 62. Paddle; 63. Spring; 64. Impact ball. Detailed implementation manners

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings of the specification.

[0037] A fracturing fluid backflow treatment device includes:

[0038] A box body 1, the bottom of the box body 1 is an open structure;

[0039] A coarse filtration component 2, rotatably arranged in the box body 1 and used for filtering coarse particles of the backflow fluid;

[0040] A fine filtration component 4, fixed in the box body 1 and located below the coarse filtration component 2, the fine filtration component 4 is used for filtering fine particles of the backflow fluid after coarse filtration;

[0041] A filtrate diversion component 5, fixed in the box body 1 and located below the fine filtration component 4;

[0042] A knocking mechanism 6, rotatably arranged on the box body 1, the knocking mechanism 6 cyclically knocks the fine filtration component 4;

[0043] A liquid storage tank 3, fixed above the box body 1, a diversion pipe 31 is connected through the bottom of the liquid storage tank 3, and the diversion pipe 31 is located between the knocking mechanism 6 and the coarse filtration component 2.

[0044] Refer to Figure 1 - Figure 10, the return liquid is added to the liquid storage tank 3. When the return liquid in the liquid storage tank 3 is discharged from the diversion pipe 31 from high to low, when the liquid level becomes high and then falls, its potential energy is mainly converted into kinetic energy. Then the return liquid impacts the coarse filter component 2 and the knocking mechanism 6 for circular rotation. Under the action of gravity, the coarse particles of the return liquid are intercepted by the coarse filter component 2, and the fine particles and the return liquid fall into the fine filter component 4 for fine filtration. The circulating coarse filter component 2, the filtering surface rotates to the bottom, and falls through the bottom opening of the box body 1 under the action of gravity. Then the fine filter component 4 intercepts the fine particles of the return liquid, and the filtered return liquid falls into the filtrate diversion component 5 for diversion. During this process, the circulating knocking mechanism 6 intermittently knocks the fine filter component 4 to increase the vibration of the fine filter component 4 and avoid clogging of the fine filter component 4, thereby cleaning the fine particles intercepted on the upper surface of the fine filter component 4.

[0045] The coarse filtration component 2 includes a conveyor belt 21 with multiple coarse filtration holes 211 on the surface, two rollers 22 and multiple partitions 23. The two rollers 22 are rotatably connected in the box body 1. The conveyor belt 21 is driven on the two rollers 22. Multiple partitions 23 are fixed on the outer surface of the conveyor belt 21. The bottom of the box body 1 is connected with an inverted frustum-shaped debris guide cover 11, and the edge of the conveyor belt 21 is against the inner wall of the box body 1.

[0046] Reference Figure 3 and Figure 4 and Figure 8 The two rollers 22 are rotatably connected in the box body 1 through bearings. The inner ring of the bearing is coaxially fixed to the roller 22, and the outer ring is fixed to the box body 1. The edge of the conveyor belt 21 is against the inner wall of the box body 1 to prevent unfiltered return liquid from being discharged through the gap between the conveyor belt 21 and the box body 1. When the water outflow from the guide pipe 31 hits the partition 23, the partition 23 drives the conveyor belt 21 to rotate clockwise, and during the clockwise rotation of the conveyor belt 21, the coarse filter holes 211 above the conveyor belt 21 intercept large-particle gravel, and then when the conveyor belt 21 rotates to the bottom, the gravel automatically falls under the action of gravity, thereby realizing the cyclic rotation of the coarse filter component 2 and the automatic cleaning of the intercepted gravel.

[0047] The fine filter assembly 4 includes a fine filter plate 41 and a material guide pipe 42. The fine filter plate 41 is placed on the inner side of the conveyor belt 21. The fine filter plate 41 is fixed in the box body 1. One end of the material guide pipe 42 is fixed to one side edge of the fine filter plate 41, and the other end of the material guide pipe 42 is connected to the impurity guide cover 11.

[0048] Reference Figure 4 and Figure 6 and Figure 9, after intercepting large - sized gravel through the coarse filter holes 211 of the conveyor belt 21, the fine particles and the flow - back liquid fall through the coarse filter holes 211 onto the fine filter plate 41 to intercept fine gravel. And the intercepted gravel guides the fine gravel into the impurity guide cover 11 through the material guide pipe 42, where it converges with the large gravel for convenient centralized treatment.

[0049] The filtrate diversion assembly 5 includes a diversion plate 51 and a liquid outlet pipe 52. The diversion plate 51 is placed inside the conveyor belt 21, the diversion plate 51 is placed below the fine filter plate 41, and one end of the liquid outlet pipe 52 is fixed to the edge of the diversion plate 51.

[0050] Refer to Figure 4 and Figure 6 and Figure 10 , after the flow - back liquid is filtered through the coarse filter holes 211 and the fine filter plate 41, the filtered flow - back liquid flows onto the diversion plate 51. Through the collection of the diversion plate 51, and then under the guidance of the liquid outlet pipe 52, the filtered flow - back liquid is guided into the next process.

[0051] The knocking mechanism 6 includes a shaft rod 61, a dial plate 62, a spring 63, and an impact ball 64. The shaft rod 61 is rotatably connected to the box body 1. Multiple dial plates 62 are annularly distributed on the shaft rod 61. One end of the shaft rod 61 penetrates through the box body 1. Multiple springs 63 are annularly distributed at the end of the shaft rod 61 outside the box body 1. An impact ball 64 is fixed to the end of the spring 63 away from the shaft rod 61. An extension plate 411 passing through the box body 1 is fixed to the side edge of the fine filter plate 41 close to the impact ball 64, and the extension plate 411 is within the rotation radius of the impact ball 64.

[0052] Refer to Figure 2 and Figure 5 and Figure 7 , both ends of the shaft rod 61 are rotatably connected to the box body 1 through bearings. When the water flows out from the diversion pipe 31, part of the flow - back liquid impacts on the dial plate 62, causing multiple dial plates 62 to rotate counter - clockwise in a cycle. Thereby driving the shaft rod 61 to rotate counter - clockwise. The counter - clockwise rotating shaft rod 61 drives multiple springs 63 to rotate. And under the action of centrifugal force, the springs 63 are stretched, and the impact ball 64 impacts on the extension plate 411. At the same time, the spring 63 undergoes local bending to prevent the impact ball 64 from interfering with the extension plate 411 and unable to rotate in a cycle. The extension plate 411 transmits the vibration to the fine filter plate 41, and the vibrating fine filter plate 41 shakes off the intercepted objects on its upper surface to clean the fine filter plate 41.

[0053] Both the diversion plate 51 and the fine filter plate 41 are inclined structures. The diversion plate 51 and the fine filter plate 41 are inclined in opposite directions. The liquid outlet pipe 52 and the material guide pipe 42 are placed on both sides of the box body 1.

[0054] Refer to Figure 6, through the inclined fine filter plate 41, when the impact ball 64 impacts the fine filter plate 41, the fine filter plate 41 vibrates, causing the intercepting objects above to shake under the inertial force and move along the inclined direction. This facilitates the collection of the intercepting objects in the direction of the material guide pipe 42 and prevents the fine filter plate 41 from being blocked.

[0055] Both side edges of the deflector plate 51 are in contact with the roller shaft 22, and both side edges of the fine filter plate 41 are in contact with the roller shaft 22.

[0056] Refer to Figure 4 , through the contact of the edges of the deflector plate 51 and the fine filter plate 41 with the roller shaft 22, when the roller shaft 22 rotates, the deflector plate 51 and the fine filter plate 41 can clean the debris adhered to the surface of the roller shaft 22 to ensure the cleanliness of the roller shaft 22.

[0057] Working principle: The dump truck is pushed under the impurity guide cover 11 to facilitate the collection of the intercepting objects. Then, the return drainage liquid to be filtered is added into the liquid storage tank 3. When the return drainage liquid is discharged through the diversion pipe 31, the potential energy of the return drainage liquid is converted into kinetic energy. Part of the return drainage liquid flushes on the baffle plate 62, and the other part flushes on the partition plate 23. When the water discharged from the diversion pipe 31 impacts the partition plate 23, the partition plate 23 drives the conveyor belt 21 to rotate clockwise. The coarse filter holes 211 intercept large particle gravel. When the conveyor belt 21 rotates to the lower part, the gravel drops under the action of gravity. Then, the fine particles and the return drainage liquid pass through the coarse filter holes 211 and fall onto the fine filter plate 41 for intercepting fine gravel. Finally, the intercepting objects fall into the dump truck at the bottom through the impurity guide cover 11. At the same time, driven by the baffle plate 62, the shaft rod 61 rotates counterclockwise, and the impact ball 64 rotates accordingly and impacts the extension plate 411 to improve the overall vibration effect, so as to facilitate the fine filter plate 41 to shake off the intercepting objects on the upper surface.

Claims

1. A fracturing fluid flowback treatment device, characterized in that: include: A box body (1), wherein the bottom of the box body (1) is an open structure; A coarse filter assembly (2) is rotatably disposed in the housing (1) and is used for filtering coarse particles in the return fluid; A fine filter assembly (4) is fixed in the housing (1) and placed below the coarse filter assembly (2), and the fine filter assembly (4) is used for filtering fine particles of the return liquid after the coarse filtration; The filtrate guide assembly (5) is fixed in the box (1) and is placed below the fine filter assembly (4); A knocking mechanism (6) is rotatably mounted on the housing (1), and the knocking mechanism (6) cyclically knocks the fine filter assembly (4); The liquid storage tank (3) is fixed above the box body (1); the bottom of the liquid storage tank (3) is connected through a flow guide pipe (31); the flow guide pipe (31) is placed between the knocking mechanism (6) and the coarse filter assembly (2).

2. The fracturing fluid flowback treatment device according to claim 1, characterized in that: The coarse filtering assembly (2) comprises a conveyor belt (21) with a plurality of coarse filtering holes (211) on its surface, two rollers (22) and a plurality of partitions (23); the two rollers (22) are rotatably connected in the box body (1); the conveyor belt (21) is transmission-set on the two rollers (22); a plurality of partitions (23) are fixed on the outer surface of the conveyor belt (21); an inverted frustum-shaped impurity guide cover (11) is connected through the bottom of the box body (1); and the edge of the conveyor belt (21) abuts against the inner wall of the box body (1).

3. The fracturing fluid flowback treatment device according to claim 2, wherein: The fine filter assembly (4) comprises a fine filter plate (41) and a material guide pipe (42), wherein the fine filter plate (41) is placed inside the conveyor belt (21), the fine filter plate (41) is fixed inside the box (1), one end of the material guide pipe (42) is fixed to one side edge of the fine filter plate (41), and the other end of the material guide pipe (42) is connected to the impurity guide cover (11).

4. A fracturing fluid backflow treatment device according to claim 3, characterized in that: The filtrate guide assembly (5) comprises a guide plate (51) and a liquid outlet pipe (52), wherein the guide plate (51) is placed inside the conveyor belt (21), the guide plate (51) is placed below the fine filter plate (41), and one end of the liquid outlet pipe (52) is fixed to the edge of the guide plate (51).

5. A fracturing fluid backflow treatment device according to claim 3, characterized in that: The knocking mechanism (6) comprises a shaft (61), a paddle (62), a spring (63) and a striking ball (64); the shaft (61) is rotatably connected to the box (1); a plurality of paddles (62) are annularly distributed on the shaft (61); one end of the shaft (61) passes through the box (1); a plurality of springs (63) are annularly distributed on the end of the shaft (61) outside the box (1); a striking ball (64) is fixed to the end of the spring (63) away from the shaft (61); an extension plate (411) passing through the box (1) is fixed to the edge of one side of the fine filter plate (41) close to the striking ball (64); the extension plate (411) is within the rotation radius of the striking ball (64).

6. The fracturing fluid flowback treatment device according to claim 4, wherein: The guide plate (51) and the fine filter plate (41) are both inclined structures, and the guide plate (51) and the fine filter plate (41) are inclined in opposite directions. The liquid outlet pipe (52) and the material guide pipe (42) are placed on both sides of the box body (1).

7. A fracturing fluid flowback treatment device according to claim 4, characterized in that: Both side edges of the flow deflector (51) abut against the roller shaft (22), and both side edges of the fine filter plate (41) abut against the roller shaft (22).

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