Fracturing flow-back fluid separation device

Abstract

The invention relates to a fracturing flow-back fluid separating device, and relates to the technical field of fracturing flow-back fluid treatment.The fracturing flow-back fluid separating device comprises a reaction tank and a separating box which are sequentially arranged from top to bottom, a gel breaking mechanism is arranged in the reaction tank, a discharging port is formed in the bottom of the reaction tank, and the separating box communicates with the discharging port through a discharging pipe; and a vibration assembly for driving the filter plate to vibrate is arranged in the separation box. Firstly, the flowback liquid is guided into the reaction tank, the gel breaking mechanism is started to conduct gel breaking treatment on the flowback liquid, the flowback liquid obtained after gel breaking treatment enters the separation box through the discharging pipe, waste residues remain on the filter plate, waste liquid is collected in the separation box after passing through the filter plate, and the vibration assembly is started to drive the filter plate to vibrate; and the gel breaking and the filtering are separately arranged, so that the backflow liquid without gel breaking is prevented from blocking the filtering plate, the blocking probability of the filtering plate is reduced, and the separation efficiency of the fracturing backflow liquid is improved.

Description

Technical Field

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

[0002] During the exploitation of oil and gas wells, a certain amount of pressurized fracturing flowback fluid needs to be pumped into the wellhead. After the fracturing flowback fluid enters the production layer of the oil and gas well, the production layer is improved, thereby increasing the production output of oil and gas. During the fracturing process, a large amount of fracturing flowback fluid will be discharged from the wellhead. The fracturing flowback fluid contains waste fracturing flowback fluid (hereinafter referred to as waste liquid) and waste residue (including rock residue and / or sand and gravel and other solids). Among them, the waste liquid is a pollutant. Since the waste liquid cannot be discharged directly, usually the operating personnel have to separate the waste liquid from the waste residue in the fracturing flowback fluid, and then purify the separated waste liquid separately. Only after treatment can it be discharged separately, and the separated waste residue is dumped.

[0003] Existing fracturing return fluid separation devices generally use a filtering structure to separate the waste liquid from the rock in the fracturing return fluid, and spray a gel-breaking agent to prevent the fracturing return fluid from being too viscous and affecting the separation. In the related technology, reference can be made to the Chinese invention patent with application number 202410885940.7, which discloses a fracturing return fluid separation device and method, including a separation component and a bracket. The separation component includes a shell, a separation cylinder and a driving structure. A filtering device is provided on one side of the separation cylinder. A liquid spraying pipe and a cleaning component are provided in the separation cylinder. The gear is driven to rotate by a motor, and the gear ring and the separation cylinder are driven to rotate. The centrifugal force generated by the rotation of the separation cylinder is used to separate the waste residue from the liquid, and the liquid and the waste residue are separated through a filter screen, and the liquid is discharged along the guide part. The waste liquid and waste residue attached to the inner wall of the separation cylinder are scraped off by the cleaning component.

[0004] However, in actual use, rapid gel breaking is the key to effective treatment. It is necessary to improve the separation effect of waste liquid and waste residue. The gel breaker must be fully mixed with the return fluid before separation. However, the viscosity of the fracturing return fluid is large, and the mass transfer efficiency of the gel breaker is low. Under the action of centrifugal force, it is more difficult for the gel breaker to mix with the return fluid located in the center of the separation cylinder, thereby reducing the gel breaking efficiency. As a result, during filtration, a large number of precipitated small particles of oil droplets and gel breaking residues in the fracturing return fluid easily clog the filter device, making it impossible to perform normal filtration treatment, thereby reducing the separation efficiency of the fracturing return fluid. Summary of the invention

[0005] In order to improve the efficiency of fracturing flowback fluid separation, the present invention application provides a fracturing flowback fluid separation device.

[0006] The present application provides a fracturing flowback fluid separation device, which adopts the following technical solution:

[0007] A fracturing flowback fluid separation device comprises a reaction tank and a separation box which are arranged in sequence up and down, wherein a gel breaking mechanism is arranged inside the reaction tank, a discharge port is provided at the bottom of the reaction tank, the separation box is connected with the discharge port through a discharge pipe, a filter plate is arranged inside the separation box, and a vibration component for driving the filter plate to vibrate is arranged inside the separation box.

[0008] By adopting the above technical scheme, the return fluid is first introduced into the reaction tank, and the degumming mechanism is started to perform degumming treatment on the return fluid. The return fluid after degumming enters the separation box through the discharge pipe, and the waste residue remains on the filter plate, while the waste liquid is collected in the separation box after passing through the filter plate. The vibration component is started to drive the filter plate to vibrate, thereby reducing the probability of waste residue and waste liquid accumulating on the filter plate, and the degumming and filtering are set separately to avoid the return fluid without degumming clogging the filter plate, thereby reducing the probability of filter plate clogging, thereby improving the efficiency of separation of fracturing return fluid.

[0009] Optionally, the gel breaking mechanism includes:

[0010] A liquid inlet pipe, the liquid inlet pipe extends into the reaction tank and is coaxially arranged with the reaction tank, and an end of the liquid inlet pipe away from the reaction tank is provided with a liquid inlet pump for pumping in a gel breaker;

[0011] A rotating shaft, the rotating shaft is coaxially sleeved on the liquid inlet pipe, the rotating shaft has a liquid storage cavity, and the bottom end of the liquid inlet pipe extends into the liquid storage cavity;

[0012] A rotating rod, the rotating rod is fixed on the rotating shaft and has a hollow cavity, the hollow cavity is communicated with the liquid storage cavity, and the rotating rod has a first liquid spraying port, the first liquid spraying port is communicated with the hollow cavity;

[0013] A stirring paddle, the stirring paddle is fixed on the rotating shaft and is located below the rotating rod;

[0014] The driving assembly is arranged on the reaction tank and connected to the rotating shaft and is used to drive the rotating shaft to rotate.

[0015] By adopting the above technical scheme, the liquid inlet pump is turned on while the return fluid is introduced, the breaker enters the liquid storage chamber through the liquid inlet pipe, the breaker in the liquid storage chamber enters the hollow chamber, the driving component is started to drive the rotating shaft to rotate, the rotation of the rotating shaft drives the rotating rod and the stirring paddle to rotate, and the breaker is sprayed out from the first liquid spray port on the rotating rod at the same time, the breaker directly contacts the return fluid and disperses from the middle of the reaction tank to the surroundings as the stirring proceeds, thereby increasing the contact time between the breaker and the return fluid, stirring and adding the breaker are carried out simultaneously, the efficiency of the breaker is improved, and thus the efficiency of the separation of the fracturing return fluid is improved.

[0016] Optionally, a plurality of auxiliary rods are sequentially arranged on the rotating rod, a liquid spraying cavity is provided in the auxiliary rod, the liquid spraying cavity is communicated with the hollow cavity, and a plurality of second liquid spraying ports are provided on the auxiliary rod, the second liquid spraying ports are communicated with the liquid spraying cavity.

[0017] By adopting the above technical scheme, a part of the breaker in the hollow cavity is sprayed out from the first spray port, and the other part of the breaker enters the spray cavity and is sprayed out from the second spray port. At the same time, the auxiliary rod rotates with the rotating rod, thereby realizing the addition of breaker in multiple positions, cooperating with the stirring action, improving the breaker efficiency of the return fluid, thereby improving the efficiency of separation of the fracturing return fluid.

[0018] Optionally, the driving component includes:

[0019] An installation box, wherein the installation box is fixedly arranged in the reaction tank, and the liquid inlet pipe is passed through the installation box;

[0020] A driving motor, the driving motor is arranged on the reaction tank, the output end of the driving motor is provided with a driving shaft, and the driving shaft extends into the installation box;

[0021] A driving bevel gear, which is coaxially fixed to an end of the driving shaft away from the driving motor and is located in the mounting box;

[0022] The driven bevel gear is coaxially fixed on the top of the rotating shaft and is located in the installation box and meshes with the driving bevel gear.

[0023] By adopting the above technical solution, the driving motor is started to drive the active bevel gear to rotate through the driving shaft, the active bevel gear drives the driven bevel gear to rotate, and the driven bevel gear drives the rotating shaft to rotate, thereby realizing the rotation of the rotating rod, the auxiliary rod and the stirring paddle. The installation box protects the active bevel gear and the driven bevel gear, thereby extending the service life of the active bevel gear and the driven bevel gear.

[0024] Optionally, the outer jacket of the reaction tank is provided with a temperature control interlayer, and a temperature control cavity is formed between the temperature control interlayer and the reaction tank.

[0025] By adopting the above technical solution, the temperature of the reaction tank is adjusted by using a water bath, an oil bath or installing a heating tube in the temperature control chamber to meet the optimal operating temperature of different breakers, thereby improving the breaking efficiency and thus improving the efficiency of fracturing return fluid separation.

[0026] Optionally, the filter plate is located below the discharge pipe and extends obliquely downward, the lower end of the filter plate is rotatably connected to the inner wall of the separation box, and the vibration assembly is arranged on the lower side of the upper end of the filter plate and is used to drive the filter plate to vibrate.

[0027] By adopting the above technical solution, the mixture after degumming enters the separation box through the discharge pipe, the waste residue remains on the filter plate and slides to the bottom of the filter plate, the waste liquid passes through the filter plate and collects at the bottom of the separation box, and the vibration component drives the filter plate to vibrate, thereby accelerating the separation efficiency of the waste liquid and waste residue, and reducing the probability of the waste liquid and waste residue clogging the filter plate.

[0028] Optionally, the vibration component includes:

[0029] An output motor, the output motor is arranged on the separation box, the output end of the output motor is connected to an output shaft, the output shaft extends into the separation box and is located below the filter plate;

[0030] The cam is fixed on the output shaft and contacts the lower surface of the filter plate.

[0031] By adopting the above technical solution, the output motor starts to drive the output shaft to rotate, and the rotation of the output shaft drives the cam to rotate. The diameters at both ends of the cam are inconsistent, so the rotation of the cam pushes the upper end of the filter plate to slide up and down, thereby generating vibration, thereby realizing the vibration of the filter plate.

[0032] Optionally, there are multiple cams, and the multiple cams are arranged in sequence along the length direction of the output shaft.

[0033] By adopting the above technical solution, the rotation of the output shaft drives the multiple cams to rotate synchronously, and the multiple cams cooperate to support the filter plate, thereby improving the stability of the filter plate movement.

[0034] Optionally, the separation box has a discharge port, which is connected to the bottom end of the filter plate. A guide plate is provided at the discharge port, which extends obliquely downward, and baffles are provided on both sides of the guide plate.

[0035] By adopting the above technical solution, the waste slag is discharged from the guide plate after passing through the discharge port, and the baffle reduces the probability of waste slag scattering, thereby improving the convenience of waste slag collection.

[0036] Optionally, the separation box is provided with a cleaning port, and the upper cover of the cleaning port is provided with a shielding cover.

[0037] By adopting the above technical solution, during normal operation, the shielding cover shields the cleaning port to reduce the amount of impurities in the environment entering the separation box. The shielding cover is opened, and the filter plate can be cleaned through the cleaning port, thereby improving the convenience of cleaning the filter plate.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. First, the return fluid is introduced into the reaction tank, and the degelling mechanism is started to degel the return fluid. The return fluid after degelling enters the separation box through the discharge pipe. The waste residue remains on the filter plate, and the waste liquid is collected in the separation box after passing through the filter plate. The vibration component is started to drive the filter plate to vibrate, thereby reducing the probability of waste residue and waste liquid accumulating on the filter plate, and the degelling and filtering are set separately to avoid the return fluid without degelling clogging the filter plate, thereby reducing the probability of filter plate clogging, thereby improving the efficiency of separation of fracturing return fluid.

[0040] 2. While introducing the return liquid, turn on the liquid inlet pump, and the gel breaker enters the liquid storage chamber through the liquid inlet pipe. The gel breaker in the liquid storage chamber enters the hollow chamber, and the drive motor starts to drive the rotating shaft to rotate. The rotation of the rotating shaft drives the rotating rod and the stirring paddle to rotate. At the same time, the gel breaker is sprayed out from the first liquid spray port on the rotating rod. The gel breaker directly contacts the return liquid and disperses from the middle of the reaction tank to the surroundings as the stirring proceeds, thereby saving the reaction time of the gel breaker and the return liquid. The stirring and the addition of the gel breaker are carried out simultaneously, which improves the efficiency of gel breaking.

[0041] 3. A part of the breaker in the hollow cavity is sprayed out from the first spray port, and the other part of the breaker enters the spray cavity and is sprayed out from the second spray port. At the same time, the auxiliary rod rotates with the rotating rod, thereby realizing the addition of breaker in multiple positions. Combined with the stirring action, the breaker efficiency of the return fluid is improved, thereby improving the efficiency of separation of the fracturing return fluid.

[0042] 4. The output motor starts and drives the cam to rotate. The diameters at both ends of the cam are inconsistent, so the rotation of the cam pushes the upper end of the filter plate to slide up and down, thereby generating vibration, thereby accelerating the separation efficiency of waste liquid and waste residue, and reducing the probability of waste liquid and waste residue clogging the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of this application;

[0044] Figure 2 is a cross-sectional view of the reaction tank and the separation box in the present application;

[0045] Figure 3 is a schematic diagram of the structure of the drive component in this application;

[0046] Figure 4 is a partial cross-sectional view of the rotating shaft in the present application;

[0047] Figure 5 is a schematic diagram of the structure of the vibration assembly in the present application, wherein the separation box is partially cut away;

[0048] Figure 6 It is a schematic diagram of the structure of the moving tank in the present application, in which the separation box is partially cut away.

[0049] Reference numerals: 1, reaction tank; 11, discharge pipe; 111, control valve; 12, feed plate; 13, temperature control interlayer; 131, temperature control chamber; 14, timer; 2, separation box; 21, filter plate; 22, cleaning port; 221, shielding cover; 23, discharge port; 24, moving groove; 25, guide plate; 251, baffle; 26, liquid discharge pipe; 3, gel breaking mechanism; 31, liquid inlet pipe; 311, liquid inlet pump; 32, rotating shaft; 32 1. Liquid storage chamber; 33. Rotating rod; 331. Hollow chamber; 332. First liquid spraying port; 34. Stirring paddle; 35. Driving assembly; 351. Mounting box; 352. Driving motor; 353. Active bevel gear; 354. Driven bevel gear; 355. Driving shaft; 36. Sub-rod; 361. Liquid spraying chamber; 362. Second liquid spraying port; 4. Vibrating assembly; 41. Output motor; 411. Output shaft; 42. Cam; 5. Collecting box. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-6 This application is described in further detail.

[0051] The embodiment of the present application discloses a fracturing flowback fluid separation device.

[0052] Reference Figure 1 and Figure 2 A fracturing flowback fluid separation device comprises a reaction tank 1 and a separation box 2 which are arranged in sequence from top to bottom. The reaction tank 1 is provided with a gel breaking mechanism 3. The bottom of the reaction tank 1 has a discharge port, and the separation box 2 is connected with the discharge port through a discharge pipe 11. The separation box 2 is provided with a filter plate 21, and the separation box 2 is provided with a vibration component 4 for driving the filter plate 21 to vibrate.

[0053] Reference Figure 1 and Figure 2 The body of the reaction tank 1 is cylindrical, and the bottom of the tank is arc-shaped. A feed port is provided on the outer wall of the top of the reaction tank 1, and a feed plate 12 extending obliquely upward is provided at the feed port. The reaction tank 1 is outer-coated with a temperature control interlayer 13, and the temperature control interlayer 13 is located below the feed plate 12, and a temperature control cavity 131 is formed between the temperature control interlayer 13 and the reaction tank 1.

[0054] Reference Figure 1 The reaction tank 1 is provided with a timer 14, and the discharge pipe 11 is provided with a control valve 111 for controlling the opening and closing of the discharge port. In this embodiment, the timer 14 is any device with a timing function in the prior art, and the control valve 111 is a solenoid valve.

[0055] Reference Figure 2 and Figure 3The gel-breaking mechanism 3 includes a liquid inlet pipe 31, a rotating shaft 32, a rotating rod 33, a stirring paddle 34 and a driving assembly 35. The liquid inlet pipe 31 extends into the reaction tank 1 and is coaxially arranged with the reaction tank 1. An inlet pump 311 for pumping a gel-breaking agent is provided at one end of the liquid inlet pipe 31 away from the reaction tank 1.

[0056] Reference Figure 3 and Figure 4 The rotating shaft 32 is coaxially sleeved on the liquid inlet tube 31 , the bottom end of the rotating shaft 32 is located below the bottom end of the liquid inlet tube 31 , the rotating shaft 32 has a liquid storage cavity 321 , and the bottom end of the liquid inlet tube 31 extends into the liquid storage cavity 321 .

[0057] Reference Figure 2 , Figure 3 and Figure 4 , a plurality of rotating rods 33 are provided, and the plurality of rotating rods 33 are fixed on the rotating shaft 32 and extend radially along the rotating shaft 32. A hollow cavity 331 is provided in the rotating rod 33, and the hollow cavity 331 is communicated with the liquid storage cavity 321. A plurality of first liquid spraying ports 332 are provided at intervals on the rotating rod 33, and the first liquid spraying ports 332 are communicated with the hollow cavity 331; a plurality of sub-rods 36 are provided in sequence on the rotating rod 33, and an angle is formed between the sub-rod 36 and the rotating rod 33, and the sub-rod 36 extends toward the inner wall of the reaction tank 1, and a liquid spraying cavity 361 is provided in the sub-rod 36, and the liquid spraying cavity 361 is communicated with the hollow cavity 331. A plurality of second liquid spraying ports 362 are provided on the sub-rod 36, and the second liquid spraying ports 362 are communicated with the liquid spraying cavity 361.

[0058] Reference Figure 2 and Figure 3 A plurality of stirring paddles 34 are provided, and the plurality of stirring paddles 34 are fixed on the rotating shaft 32 and are located below the rotating rod 33 . The stirring paddles 34 extend radially along the rotating shaft 32 , and the lower surface of the stirring paddles 34 has an arc that is adapted to the bottom of the reaction tank 1 .

[0059] Reference Figure 2 and Figure 3 The driving assembly 35 is arranged on the reaction tank 1 and is connected to the rotating shaft 32 and is used to drive the rotating shaft 32 to rotate. The driving assembly 35 includes a mounting box 351, a driving motor 352, an active bevel gear 353 and a driven bevel gear 354. The mounting box 351 is fixed in the reaction tank 1, the liquid inlet pipe 31 is passed through the mounting box 351, the driving motor 352 is fixed on the outer wall of the reaction tank 1, and the output end of the driving motor 352 is transmission-connected with a driving shaft 355, and the driving shaft 355 extends horizontally into the mounting box 351.

[0060] Reference Figure 2 and Figure 3The driving bevel gear 353 is coaxially keyed to the end of the driving shaft 355 away from the driving motor 352 and is located in the installation box 351 . The driven bevel gear 354 is coaxially keyed to the top of the rotating shaft 32 and is located in the installation box 351 and meshes with the driving bevel gear 353 .

[0061] Reference Figure 2 , Figure 3 and Figure 4 , the fracturing flowback fluid is introduced into the reaction tank 1 through the feed plate 12, and the breaker is pumped into the reaction tank 1 through the liquid inlet pump 311, and water or oil of suitable temperature is introduced into the temperature control chamber 131, or an electric heating tube is installed in the temperature control chamber 131 to heat it to a suitable temperature. The suitable temperature is determined according to the optimal working temperature of the breaker. The driving motor 352 is started synchronously, and the rotating shaft 32 is driven to rotate through the cooperation of the active bevel gear 353 and the driven bevel gear 354. The rotating shaft 32 drives the rotating rod 33 and the stirring paddle 34 to rotate, and the breaker enters the liquid storage chamber 321 of the rotating shaft 32 through the liquid inlet pipe 31, and enters the hollow chamber 331 through the liquid storage chamber 321.

[0062] Reference Figure 2 , Figure 3 and Figure 4 A part of the breaker in the hollow cavity 331 is sprayed out from the first spray port 332, and another part of the breaker enters the spray cavity 361 and is sprayed out from the second spray port 362. The breaker is added at multiple positions and the stirring action is coordinated at the same time. The breaker is in direct contact with the return fluid. As the stirring proceeds, the breaker disperses from the middle of the reaction tank 1 to the surroundings, thereby saving the reaction time of the breaker and the return fluid. The stirring and the addition of the breaker are carried out simultaneously, which improves the efficiency of the breaker, thereby improving the efficiency of the separation of the fracturing return fluid.

[0063] Reference Figure 2 and Figure 5 The discharge pipe 11 extends into the separation box 2. In this embodiment, the separation box 2 is only connected to one discharge pipe 11. In other embodiments and practical applications, one separation box 2 can be connected to the discharge pipes 11 of multiple reaction tanks 1, thereby realizing continuous separation of waste liquid and waste residue and saving costs.

[0064] Reference Figure 1 , Figure 2 and Figure 5 A cleaning port 22 is provided on the upper surface of the separation box 2, and a shielding cover 221 is provided on the cleaning port 22. The filter plate 21 has a plurality of filter holes (not shown in the figure), and the filter plate 21 is located below the discharge pipe 11 and extends obliquely downward. A discharge port 23 is provided on the outer wall of the separation plate away from the discharge pipe 11. The discharge port 23 is connected to the bottom end of the filter plate 21, and the lower end of the filter plate 21 is rotatably connected to the inner wall at the discharge port 23. The vibration component 4 is provided on the lower side of the upper end of the filter plate 21 and is used to drive the filter plate 21 to vibrate.

[0065] Reference Figure 5 and Figure 6 A motion groove 24 is provided on the inner wall of the separation box 2 opposite to the discharge port 23. The motion groove 24 is connected to the separation box 2. In the initial state, the lower surface of the upper end of the filter plate 21 abuts against the inner wall of the motion groove 24. The vibration component 4 includes an output motor 41 and a cam 42.

[0066] Reference Figure 1 , Figure 5 and Figure 6 The output motor 41 is fixed on the outer wall of the separation box 2, and the output end of the output motor 41 is transmission-connected with an output shaft 411, which extends horizontally into the separation box 2 and is located below the filter plate 21, and the length direction of the output shaft 411 is parallel to the length direction of the discharge port 23; a plurality of cams 42 are provided, and the plurality of cams 42 are fixed on the output shaft 411 in sequence along the length direction of the output shaft 411 and abut against the lower surface of the filter plate 21.

[0067] Reference Figure 1 and Figure 2 A material guide plate 25 extending outward and downward is provided at the discharge port 23, and vertically extending baffles 251 are provided on both sides of the material guide plate 25. A movable collecting box 5 is provided at the rear end of the separation box 2, and the top of the collecting box 5 is in an open state. The bottom end of the material guide plate 25 extends to the opening of the collecting box 5. A liquid outlet pipe 26 is provided on the outer side wall of the bottom of the separation box 2, and the liquid outlet pipe 26 is connected to the space below the filter plate 21 in the separation box 2.

[0068] Reference Figure 1 , Figure 2 and Figure 5 The mixture after gelatinization enters the separation box 2 through the discharge pipe 11, the waste residue remains on the filter plate 21 and slides to the bottom of the filter plate 21, and the waste residue passes through the guide plate 25 and enters the collection box 5 for collection. The waste liquid passes through the filter hole and collects at the bottom of the separation box 2 and is discharged through the liquid discharge pipe 26. The output motor 41 starts to drive the cam 42 to rotate. The diameters at both ends of the cam 42 are inconsistent, so the rotation of the cam 42 pushes the upper end of the filter plate 21 to slide up and down, thereby generating vibration, thereby accelerating the separation efficiency of the waste liquid and waste residue, and reducing the probability of the waste liquid and waste residue clogging the filter plate 21.

[0069] Reference Figure 2 , Figure 4 and Figure 5 During cleaning, the input end of the liquid inlet pump 311 can be connected to the cleaning liquid storage tank, and the cleaning liquid can be pumped into the liquid storage chamber 321 through the liquid inlet pipe 31, and sprayed out from the first liquid spray port 332 and the second liquid spray port 362. The reaction tank 1 can be cleaned in coordination with the stirring action, and the shielding cover 221 can be opened. The filter plate 21 can be washed and cleaned through the cleaning port 22, thereby improving the convenience of cleaning the filter plate 21.

[0070] The working principle of the embodiment of the present application is as follows:

[0071] The breaker enters the liquid storage chamber 321 of the rotating shaft 32 through the liquid inlet pipe 31, and enters the hollow chamber 331 through the liquid storage chamber 321. A part of the breaker in the hollow chamber 331 is sprayed out from the first spray port 332, and another part of the breaker enters the spray chamber 361 and is sprayed out from the second spray port 362. The breaker is added at multiple positions and the stirring action is coordinated at the same time. The breaker is directly in contact with the return liquid. As the stirring proceeds, the breaker is dispersed from the middle of the reaction tank 1 to the surroundings, thereby saving the reaction time of the breaker and the return liquid. The stirring and the addition of the breaker are carried out simultaneously, thereby improving the breaking efficiency.

[0072] The mixture after gel breaking enters the separation box 2 through the discharge pipe 11, the waste residue remains on the filter plate 21 and slides to the bottom of the filter plate 21, the waste residue passes through the guide plate 25 and enters the collection box 5 for collection, the waste liquid passes through the filter hole and collects at the bottom of the separation box 2 and is discharged through the liquid discharge pipe 26, the output motor 41 starts to drive the cam 42 to rotate, the diameters at both ends of the cam 42 are inconsistent, so the rotation of the cam 42 pushes the upper end of the filter plate 21 to slide up and down, thereby generating vibration, thereby accelerating the separation efficiency of the waste liquid and waste residue, and reducing the probability of the waste liquid and waste residue clogging the filter plate 21, thereby improving the separation efficiency of the fracturing return fluid.

[0073] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fracturing flowback fluid separation device, characterized in that: The invention comprises a reaction tank (1) and a separation box (2) which are arranged in sequence from top to bottom, wherein a gel breaking mechanism (3) is arranged inside the reaction tank (1), a discharge port is provided at the bottom of the reaction tank (1), the separation box (2) is connected to the discharge port via a discharge pipe (11), a filter plate (21) is arranged inside the separation box (2), and a vibration component (4) for driving the filter plate (21) to vibrate is arranged inside the separation box (2).

2. A fracturing flowback fluid separation device according to claim 1, characterized in that: The gel breaking mechanism (3) comprises: A liquid inlet pipe (31), the liquid inlet pipe (31) extending into the reaction tank (1) and being coaxially arranged with the reaction tank (1), and a liquid inlet pump (311) for pumping in a gel breaker is provided at one end of the liquid inlet pipe (31) away from the reaction tank (1); A rotating shaft (32), the rotating shaft (32) being coaxially sleeved on the liquid inlet pipe (31), the rotating shaft (32) having a liquid storage cavity (321) therein, and the bottom end of the liquid inlet pipe (31) extending into the liquid storage cavity (321); A rotating rod (33), the rotating rod (33) being fixedly mounted on the rotating shaft (32) and having a hollow cavity (331), the hollow cavity (331) being communicated with the liquid storage cavity (321), the rotating rod (33) having a first liquid spraying port (332), the first liquid spraying port (332) being communicated with the hollow cavity (331); A stirring paddle (34), wherein the stirring paddle (34) is fixed on the rotating shaft (32) and is located below the rotating rod (33); A driving assembly (35) is arranged on the reaction tank (1) and connected to the rotating shaft (32) and is used to drive the rotating shaft (32) to rotate.

3. A fracturing flowback fluid separation device according to claim 2, characterized in that: The rotating rod (33) is provided with a plurality of auxiliary rods (36) in sequence, each auxiliary rod (36) has a liquid spraying cavity (361) therein, the liquid spraying cavity (361) is communicated with the hollow cavity (331), and the auxiliary rod (36) has a plurality of second liquid spraying ports (362) thereon, the second liquid spraying ports (362) are communicated with the liquid spraying cavity (361).

4. A fracturing flowback fluid separation device according to claim 3, characterized in that: The drive assembly (35) comprises: An installation box (351), wherein the installation box (351) is fixedly arranged in the reaction tank (1), and the liquid inlet pipe (31) is passed through the installation box (351); A driving motor (352), the driving motor (352) being arranged on the reaction tank (1), the output end of the driving motor (352) being provided with a driving shaft (355), the driving shaft (355) extending into the installation box (351); A driving bevel gear (353), the driving bevel gear (353) is coaxially fixed to an end of the driving shaft (355) away from the driving motor (352) and is located in the installation box (351); A driven bevel gear (354) is coaxially fixed to the top of the rotating shaft (32), is located in the mounting box (351), and is meshed with the driving bevel gear (353).

5. The fracturing flowback fluid separation device according to claim 1, characterized in that: The outer jacket of the reaction tank (1) is provided with a temperature control interlayer (13), and a temperature control cavity (131) is formed between the temperature control interlayer (13) and the reaction tank (1).

6. The fracturing flowback fluid separation device according to claim 1, characterized in that: The filter plate (21) is located below the discharge pipe (11) and extends obliquely downward. The lower end of the filter plate (21) is rotatably connected to the inner wall of the separation box (2). The vibration component (4) is arranged on the lower side of the upper end of the filter plate (21) and is used to drive the filter plate (21) to vibrate.

7. A fracturing flowback fluid separation device according to claim 6, characterized in that: The vibration component (4) comprises: An output motor (41), the output motor (41) being arranged on the separation box (2), the output end of the output motor (41) being connected to an output shaft (411), the output shaft (411) extending into the separation box (2) and being located below the filter plate (21); A cam (42) is fixed on the output shaft (411) and contacts the lower surface of the filter plate (21).

8. A fracturing flowback fluid separation device according to claim 7, characterized in that: A plurality of the cams (42) are provided, and the plurality of the cams (42) are arranged in sequence along the length direction of the output shaft (411).

9. The fracturing flowback fluid separation device according to claim 6, characterized in that: The separation box (2) is provided with a discharge port (23), the discharge port (23) being in communication with the bottom end of the filter plate (21), a guide plate (25) being provided at the discharge port (23), the guide plate (25) extending obliquely downward, and baffles (251) being provided on both sides of the guide plate (25).

10. A fracturing flowback fluid separation device according to claim 6, characterized in that: The separation box (2) is provided with a cleaning port (22), and the cleaning port (22) is covered with a shielding cover (221).

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