A wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid

Abstract

This invention discloses a wastewater treatment system for the targeted removal of scale ions from fracturing flowback fluid, comprising a sedimentation tank, a stirring assembly, a first filter, a third crystallization reactor, and a second heat exchanger. The sedimentation tank has holes on both sides of its surface, and two sets of hinges are provided on the surfaces of each set of holes. Baffles are fixedly connected to the surfaces of both sets of hinges, and first connecting plates are fixedly connected to the surfaces of both sets of baffles. This allows residual liquid inside the sedimentation tank to overflow and flow onto the workers' clothes and shoes. When the impurity removal assembly opens the baffles, it activates the cleaning assembly, which in turn connects to the stirring assembly. The cleaning assembly, powered by the stirring assembly, cleans the impurities at the bottom of the sedimentation tank, improving cleaning efficiency and effectively enhancing wastewater treatment efficiency.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment system for the targeted removal of scale ions from fracturing flowback fluid. Background Technology

[0002] With the development of the petroleum industry, the treatment of fracturing flowback fluid has become one of the urgent problems to be solved. At present, the hydraulic fracturing technology widely used in oilfield operations will generate a large amount of fracturing flowback fluid. These fluids contain high concentrations of mineral ions and other harmful substances. If they are discharged into the natural environment without effective treatment, they will have a serious impact on the ecological environment.

[0003] Currently, common treatment technologies mainly include physical filtration, chemical precipitation, and membrane separation. Physical filtration intercepts larger particulate impurities through filter screens or sand layers; chemical precipitation uses specific agents to cause certain metal ions in the solution to form insoluble substances and settle down; and membrane separation relies on semi-permeable membranes to retain target ions. However, these traditional treatment technologies generally suffer from problems such as high equipment investment costs, complex operation and maintenance, and difficulty in achieving ideal purification effects.

[0004] The problems with existing technologies are: first, physical filtration has low efficiency in removing dissolved solid pollutants; second, chemical precipitation may introduce new sources of pollution; and finally, although membrane separation can effectively remove ions, it consumes a lot of energy and is prone to secondary pollution. Therefore, we propose a wastewater treatment system for the targeted removal of scale ions from fracturing flowback fluid. Summary of the Invention

[0005] The purpose of this invention is to provide a wastewater treatment system for the targeted removal of scale ions from fracturing flowback fluid, in order to solve the problems mentioned in the background art.

[0006] This invention is implemented as follows: a wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid includes a sedimentation tank, a stirring assembly, a first filter, a third crystallization reactor, and a second heat exchanger. The sedimentation tank has holes on both sides of its surface. Two sets of hinges are provided on the surfaces of each set of holes. Baffles are fixedly connected to the surfaces of both sets of hinges. First connecting plates are fixedly connected to both sides of the surfaces of the two sets of baffles. Second connecting plates are fixedly connected to both ends of both sides of the sedimentation tank surface. Positioning pins are detachably connected between each set of first and second connecting plates. The stirring assembly is disposed inside the sedimentation tank. A debris removal component is provided on one side of the stirring assembly, and a cleaning component is provided on the other side of the stirring assembly. The system comprises a settling tank, wherein the stirring component is used to mix and stir the flocculant liquid and the fracturing flowback fluid, the impurity removal component is used to discharge impurities inside the settling tank, and the cleaning component is used to collect and clean the internal impurities. A first filter is fixedly connected to one side of the settling tank surface, a first heat exchanger is fixedly connected to one side of the first filter surface, a first crystallization reactor is fixedly connected to one side of the first heat exchanger surface, a second crystallization reactor is fixedly connected to one side of the first crystallization reactor surface, a third crystallization reactor is fixedly connected to one side of the second crystallization reactor surface, a second filter is fixedly connected to one side of the third crystallization reactor surface, and the second heat exchanger is fixedly connected to one side of the second filter surface.

[0007] In a preferred embodiment of the present invention, the stirring assembly includes a motor, a fixed plate, a transmission belt, and a stirring rod. The motor is fixedly connected to one side of the sedimentation tank surface, the fixed plate is fixedly connected to the other side of the sedimentation tank surface, and a first rotating shaft is fixedly connected to the upper surface of the fixed plate.

[0008] In a preferred embodiment of the present invention, both the rotating shaft and the motor output end are fixedly connected to connecting rods, and one end of each of the two sets of connecting rods is fixedly connected to a first transmission wheel.

[0009] In a preferred embodiment of the present invention, a support plate is fixedly connected between both sides of the inner wall of the sedimentation tank, and hollow tubes are movably connected to both ends of the surface of the support plate. A second transmission wheel is fixedly connected to one end of the surface of each of the two sets of hollow tubes.

[0010] In a preferred embodiment of the present invention, the transmission belt is connected to the surfaces of two sets of first transmission wheels and two sets of second transmission wheels. Several sets of stirring rods are fixedly connected to one end of the surfaces of two sets of hollow tubes. Several sets of drain pipes are fixedly connected to one side of the surfaces of several sets of stirring rods. The hollow tubes, stirring rods and drain pipes are connected and are used together for the injection and discharge of flocculant liquid. A first gear is fixedly connected to one end of the surfaces of two sets of hollow tubes.

[0011] As a preferred embodiment of the present invention, the impurity removal assembly includes a first sliding shell, a spring plate, and a movable shell. Two sets of the first sliding shells are respectively fixedly connected to the bottom sides of the sedimentation tank, and a top plate is movably connected inside each set of the first sliding shells.

[0012] In a preferred embodiment of the present invention, a first toothed plate is movably connected to the surface of both sets of top plates, the first toothed plate is meshed with one side of the first gear, the two sets of spring pieces are respectively fixedly connected between the corresponding top plates and the first toothed plates, and a push rod is fixedly connected to one end of one side of the surface of both sets of top plates.

[0013] As a preferred embodiment of the present invention, each of the two sets of top plate surfaces is fixedly connected to a sphere at one end, the two sets of movable shells are respectively movably connected to the surfaces of the two sets of spheres, and the two sets of movable shells are respectively fixedly connected to both ends of one side of the inner wall of the baffle.

[0014] As a preferred embodiment of the present invention, the cleaning assembly includes a second rotating shaft, a third gear, a slide bar, and a scraper. Two sets of second rotating shafts are rotatably connected to both sides of the bottom of the sedimentation tank. A second gear is fixedly connected to the upper surface of each set of second rotating shafts. The two sets of third gears are fixedly connected to the upper surfaces of the two sets of second gears, and the third gears are meshed with the other side of the first gear.

[0015] In a preferred embodiment of the present invention, the four sets of sliding rods are respectively fixedly connected to the bottom of the sedimentation tank near the second gear. A spring rod is fixedly connected to one side of each of the four sets of sliding rods. A second sliding shell is fixedly connected to the piston end of each of the two sets of spring rods. A second toothed plate is movably connected to the surface of each of the two sets of second sliding shells. The two sets of scrapers are respectively fixedly connected to one end of the surface of each of the two sets of second toothed plates. An inclined plate is movably connected inside each of the two sets of second toothed plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention involves injecting fracturing flowback fluid into a sedimentation tank. Since flocculant can be pre-injected into the stirring assembly, when the lower part of the fracturing flowback fluid is stirred (promoting uniform mixing of the flocculant and the flowback fluid), the flocculant can be simultaneously discharged into the flowback fluid. Subsequently, natural sedimentation removes larger particles and some suspended solids. The settled liquid then passes through a first filter to further remove fine particles, improving the quality of the liquid entering the first, second, and third crystallization reactors. This provides a crystallization site for scale ions in the fracturing flowback fluid. Furthermore, through specific induced crystallization technology, scale ions crystallize and precipitate under specific conditions. After passing through the first and second crystallization reactors… The liquid treated by the crystallization reactor and the third crystallization reactor passes through the second filter to remove residual fine particles and crystallization waste, ensuring the quality of the effluent. The effluent can also be disinfected. Finally, when removing impurities from the sedimentation tank, the positioning pin is removed from the first and second connecting plates. Then, the impurity removal component uses the stirring component to open the baffle. If the baffle is opened manually, residual liquid inside the sedimentation tank may overflow and spill onto the workers' clothes and shoes. When the impurity removal component opens the baffle, it activates the cleaning component, which is then linked to the stirring component. The cleaning component, powered by the stirring component, cleans the impurities at the bottom of the sedimentation tank, improving cleaning efficiency and effectively increasing wastewater treatment efficiency.

[0018] 2. This invention, when the motor is running, utilizes one set of connecting rods to drive one set of first transmission wheels to rotate. Subsequently, a transmission belt drives another set of first transmission wheels and another set of connecting rods to rotate on the surface of the first rotating shaft. This also drives a second transmission wheel to rotate inside a support plate via a hollow tube. Flocculant liquid can be injected into the hollow tube. While the hollow tube drives the stirring rotation, the flocculant liquid is discharged from the drain pipe into the fracturing flowback fluid, thereby accelerating the sedimentation of impurities inside the fracturing flowback fluid. The first gear also rotates along with the hollow tube, facilitating the mixing and stirring of the fracturing flowback fluid inside the sedimentation tank, ensuring that the flocculant and impurities are evenly dispersed inside the fracturing flowback fluid, thus accelerating sedimentation efficiency.

[0019] 3. In this invention, when the first gear rotates, it drives the first toothed plate to move. When the baffle is closed and locked, the baffle is not pushed open by the top plate. Therefore, the first toothed plate moves forward and continuously squeezes the spring. When the first toothed plate moves to a certain position, since one side of the first toothed plate has no teeth, the first gear will only continuously push the first toothed plate, but the first toothed plate will not continue to move forward. When the baffle is opened, the first toothed plate will use the spring to drive the top plate forward, thereby pushing the baffle open. This achieves the effect of avoiding residual liquid from flowing onto the staff when the baffle is manually opened.

[0020] 4. In this invention, when the first toothed plate pushes the top plate forward, the push rod will press against the inclined plate. Since the surface of the inclined plate is inclined, it will cause the second toothed plate to slide on the surface of the slide rod using the second sliding shell, thereby making the second toothed plate mesh with the second gear. The spring rod is used to drive the second sliding shell to reset. As the first gear rotates, it will drive the third gear and the second gear to rotate using the second rotating shaft. At this time, the second toothed plate will drive the scraper to move at the bottom of the sedimentation tank and push the impurities out from the position of the baffle. Throughout the process, the inclined plate always maintains a movable connection with the second toothed plate, which can effectively improve the cleaning efficiency of impurities at the bottom of the sedimentation tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the stirring assembly structure provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the third gear structure provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the first gear structure provided in an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the movable shell structure provided in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the scraper structure provided in an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the first sliding shell structure provided in an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the baffle structure provided in an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the positioning pin structure provided in an embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the processing flow provided in an embodiment of the present invention.

[0031] In the diagram: 1. Sedimentation tank; 2. Agitator assembly; 201. Motor; 202. First transmission wheel; 203. Connecting rod; 204. First rotating shaft; 205. Fixed plate; 206. Support plate; 207. Second transmission wheel; 208. Hollow tube; 209. Agitator rod; 210. Drain pipe; 211. First gear; 212. Transmission belt; 3. Impurity removal assembly; 301. Movable shell; 302. Top plate; 303. First sliding shell; 304. Spring; 305. Sphere; 306. Push rod; 307. First toothed plate; 4. Cleaning... Components: 401, Second rotating shaft; 402, Second gear; 403, Third gear; 404, Second toothed plate; 405, Scraper; 406, Inclined plate; 407, Second sliding shell; 408, Slide rod; 409, Spring rod; 5, First filter; 6, First heat exchanger; 7, First crystallization reactor; 8, Second filter; 9, Second heat exchanger; 10, Second crystallization reactor; 11, Third crystallization reactor; 12, Baffle; 13, Hinge; 14, First connecting plate; 15, Second connecting plate; 16, Positioning pin. Detailed Implementation

[0032] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0033] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0034] like Figures 1 to 10As shown in the embodiment of the present invention, a wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid includes a sedimentation tank 1, a stirring assembly 2, a first filter 5, a third crystallization reactor 11, and a second heat exchanger 9. Holes are formed on both sides of the surface of the sedimentation tank 1. Two sets of hinges 13 are provided on the surface of each set of holes. Baffles 12 are fixedly connected to the surfaces of the two sets of hinges 13. First connecting plates 14 are fixedly connected to both sides of the surfaces of the two sets of baffles 12. Second connecting plates 15 are fixedly connected to both ends of both sides of the surface of the sedimentation tank 1. Positioning pins 16 are detachably connected between each set of first connecting plates 14 and second connecting plates 15. The stirring assembly 2 is disposed inside the sedimentation tank 1. A debris removal assembly 3 is provided on one side of the surface of the stirring assembly 2. On the other side, a cleaning component 4 is provided. A stirring component 2 is used to mix and stir the flocculant liquid and the fracturing flowback fluid. A waste removal component 3 is used to discharge impurities inside the sedimentation tank 1. A cleaning component 4 is used to collect and clean the internal impurities. A first filter 5 is fixedly connected to one side of the surface of the sedimentation tank 1. A first heat exchanger 6 is fixedly connected to one side of the surface of the first filter 5. A first crystallization reactor 7 is fixedly connected to one side of the surface of the first heat exchanger 6. A second crystallization reactor 10 is fixedly connected to one side of the surface of the first crystallization reactor 7. A third crystallization reactor 11 is fixedly connected to one side of the surface of the second crystallization reactor 10. A second filter 8 is fixedly connected to one side of the surface of the third crystallization reactor 11. A second heat exchanger 9 is fixedly connected to one side of the surface of the second filter 8.

[0035] The above scheme involves injecting fracturing flowback fluid into the sedimentation tank 1. Since flocculant can be pre-injected into the stirring assembly 2, when the stirring assembly 2 agitates the lower part of the fracturing flowback fluid (promoting uniform mixing of the flocculant and the flowback fluid), the flocculant can be simultaneously discharged into the flowback fluid. Subsequently, natural sedimentation removes larger particles and some suspended solids. The settled liquid then passes through the first filter 5 to further remove fine particles, improving the quality of the liquid entering the first crystallization reactor 7, the second crystallization reactor 10, and the third crystallization reactor 11. This provides a crystallization site for scale ions in the fracturing flowback fluid, and through specific induced crystallization techniques (adjusting the solution pH)... By adjusting the temperature, adding seed crystals, or utilizing electromagnetic fields, conditions are created to allow scale ions in the fracturing flowback fluid to crystallize and precipitate, thus efficiently removing scale ions, reducing the use of chemical agents, and allowing for the recovery of crystallization products. The liquid, after being treated by the first crystallization reactor 7, the second crystallization reactor 10, and the third crystallization reactor 11, passes through the second filter 8 to remove residual fine particles and crystallization waste, ensuring the quality of the effluent. Simultaneously, the effluent can be disinfected. Finally, impurities inside the sedimentation tank 1 are removed. Remove the positioning pin 16 from inside the first connecting plate 14 and the second connecting plate 15. Then, use the stirring component 2 to push open the baffle 12. If the baffle 12 is opened manually, the residual liquid inside the sedimentation tank 1 may overflow and get on the workers' clothes and shoes. When the baffle 12 is opened by the discharge component 3, it will drive the cleaning component 4 to be associated with the stirring component 2. In this way, the cleaning component 4 will use the stirring component 2 as a power source to clean the impurities at the bottom of the sedimentation tank 1, improve the cleaning efficiency, and achieve the effect of effectively improving the wastewater treatment efficiency.

[0036] refer to Figure 2 , Figure 3 , Figure 4 and Figure 5The stirring assembly 2 includes a motor 201, a fixed plate 205, a transmission belt 212, and a stirring rod 209. The motor 201 is fixedly connected to one side of the surface of the sedimentation tank 1, and the fixed plate 205 is fixedly connected to the other side of the surface of the sedimentation tank 1. A first rotating shaft 204 is fixedly connected to the upper surface of the fixed plate 205. A connecting rod 203 is fixedly connected to both the rotating shaft and the output end of the motor 201. A first transmission wheel 202 is fixedly connected to one end of each of the two sets of connecting rods 203. A support plate 206 is fixedly connected between both sides of the inner wall of the sedimentation tank 1. Hollow tubes 208 are movably connected to both ends of the surface of the support plate 206. Two sets of hollow tubes 208 are each fixedly connected to one end of a second transmission wheel 207; a transmission belt 212 is connected to the surfaces of two sets of first transmission wheels 202 and two sets of second transmission wheels 207; several sets of stirring rods 209 are fixedly connected to one end of the surfaces of two sets of hollow tubes 208; several sets of drain pipes 210 are fixedly connected to one side of the surfaces of several sets of stirring rods 209; the hollow tubes 208, stirring rods 209 and drain pipes 210 are connected and are used together for the injection and discharge of flocculant liquid; and a first gear 211 is fixedly connected to one end of the surfaces of two sets of hollow tubes 208.

[0037] The above scheme is adopted as follows: When the motor 201 is running, one set of connecting rods 203 will drive one set of first transmission wheels 202 to rotate. Then, the transmission belt 212 will drive another set of first transmission wheels 202 and another set of connecting rods 203 to rotate on the surface of the first rotating shaft 204. It will also drive the second transmission wheel 207 to rotate inside the support plate 206 via the hollow tube 208. Flocculant liquid can be injected into the hollow tube 208. While the hollow tube 208 drives the stirring to rotate, the flocculant liquid will be discharged from the drain pipe 210 into the fracturing flowback fluid, thereby accelerating the precipitation of impurities inside the fracturing flowback fluid. The first gear 211 will also rotate with the rotation of the hollow tube 208, which facilitates the mixing and stirring of the fracturing flowback fluid inside the sedimentation tank 1, so that the flocculant and impurities are evenly dispersed inside the fracturing flowback fluid, thus accelerating the sedimentation efficiency.

[0038] refer to Figure 5 and Figure 7The impurity removal component 3 includes a first sliding shell 303, a spring plate 304, and a movable shell 301. Two sets of first sliding shells 303 are fixedly connected to the bottom sides of the sedimentation tank 1, and a top plate 302 is movably connected inside each set of first sliding shells 303. A first toothed plate 307 is movably connected to the surface of each set of top plates 302. The first toothed plate 307 is meshed with one side of the first gear 211. Two sets of spring plates 304 are fixedly connected between the corresponding top plates 302 and the first toothed plates 307. A push rod 306 is fixedly connected to one end of one side of each set of top plates 302. A ball 305 is fixedly connected to one end of one side of each set of top plates 302. Two sets of movable shells 301 are movably connected to the surface of the two sets of balls 305, and the two sets of movable shells 301 are fixedly connected to both ends of one side of the inner wall of the baffle 12.

[0039] The above solution works as follows: When the first gear 211 rotates, it drives the first toothed plate 307 to move. When the baffle 12 is closed and locked, the baffle 12 will not be pushed open by the top plate 302. Therefore, the first toothed plate 307 will move forward and continuously squeeze the spring 304. When the first toothed plate 307 moves to a certain position, since there are no teeth on one side of the first toothed plate 307, the first gear 211 will only continuously push the first toothed plate 307, but the first toothed plate 307 will not continue to move forward. When the baffle 12 is opened, the first toothed plate 307 will use the spring 304 to drive the top plate 302 to move forward, thereby pushing the baffle 12 open. This achieves the effect of avoiding residual liquid from flowing onto the staff when the baffle 12 is manually opened.

[0040] refer to Figure 3 , Figure 5 and Figure 6 The cleaning component 4 includes a second rotating shaft 401, a third gear 403, a sliding rod 408, and a scraper 405. Two sets of second rotating shafts 401 are rotatably connected to the bottom sides of the sedimentation tank 1. A second gear 402 is fixedly connected to the upper surface of each set of second rotating shafts 401. Two sets of third gears 403 are fixedly connected to the upper surface of each set of second gears 402, and the third gears 403 are meshed with the other side of the first gear 211. Four sets of sliding rods 408 are fixedly connected to the bottom of the sedimentation tank 1 near the second gear 402. A spring rod 409 is fixedly connected to one side of each of the four sets of sliding rods 408. A second sliding shell 407 is fixedly connected to the piston end of each of the two sets of spring rods 409. A second toothed plate 404 is movably connected to the surface of each of the two sets of second sliding shells 407. Two scrapers 405 are fixedly connected to one end of the surface of each of the two sets of second toothed plates 404. An inclined plate 406 is movably connected inside each of the two sets of second toothed plates 404.

[0041] The above scheme is adopted as follows: When the first toothed plate 307 pushes the top plate 302 forward, the push rod 306 will squeeze the inclined plate 406. Since the surface of the inclined plate 406 is inclined, the inclined plate 406 will drive the second toothed plate 404 to slide on the surface of the slide rod 408 using the second sliding shell 407, so that the second toothed plate 404 meshes with the second gear 402. The spring rod 409 is used to drive the second sliding shell 407 to reset. As the first gear 211 rotates, it will drive the third gear 403 and the second gear 402 to rotate using the second rotating shaft 401. At this time, the second toothed plate 404 will drive the scraper 405 to move at the bottom of the sedimentation tank 1 and push the impurities out from the position of the baffle 12. Throughout the process, the inclined plate 406 always maintains a movable connection with the second toothed plate 404, which can effectively improve the cleaning efficiency of the impurities at the bottom of the sedimentation tank 1.

[0042] Working principle of the invention:

[0043] In operation, when the motor 201 runs, one set of connecting rods 203 drives one set of first transmission wheels 202 to rotate. Subsequently, the transmission belt 212 drives another set of first transmission wheels 202 and another set of connecting rods 203 to rotate on the surface of the first rotating shaft 204. This also drives the second transmission wheel 207 to rotate inside the support plate 206 via the hollow tube 208. Flocculant liquid can be injected into the hollow tube 208. While driving the agitator to rotate, the flocculant liquid is discharged from the hollow tube 208. Pipe 210 discharges into the fracturing flowback fluid, thereby accelerating the precipitation of impurities inside the fracturing flowback fluid. The first gear 211 also rotates along with the hollow tube 208. As the first gear 211 rotates, it drives the first toothed plate 307 to move. When the baffle 12 is closed and locked, it is not pushed open by the top plate 302. Therefore, the first toothed plate 307 moves forward and continuously squeezes the spring 304. When the first toothed plate 307 moves to a certain position, because one side of the first toothed plate 307 is not... Because it has teeth, the first gear 211 will only continuously move the first toothed plate 307, but the first toothed plate 307 will not continue to move forward. When the baffle 12 is opened, the first toothed plate 307 will use the spring 304 to drive the top plate 302 forward, thereby pushing the baffle 12 open. When the first toothed plate 307 pushes the top plate 302 forward, it will cause the push rod 306 to press against the inclined plate 406. Since the surface of the inclined plate 406 is inclined, it will cause the inclined plate 406 to drive the second toothed plate 404 to use the second sliding shell 4 07 slides on the surface of the slide bar 408, thereby causing the second toothed plate 404 to mesh with the second gear 402. The spring pull rod 409 is used to drive the second sliding shell 407 to reset. As the first gear 211 rotates, it will drive the third gear 403 and the second gear 402 to rotate using the second rotating shaft 401. At this time, the second toothed plate 404 will drive the scraper 405 to move at the bottom of the sedimentation tank 1 and push the impurities out from the position of the baffle 12. Throughout the process, the inclined plate 406 always maintains an active connection with the second toothed plate 404.

[0044] In summary, this wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid, through its structure of a second rotating shaft 401, a second gear 402, a third gear 403, a second toothed plate 404, a scraper 405, an inclined plate 406, a second sliding shell 407, a sliding rod 408, and a spring rod 409, solves the following problems: firstly, physical filtration has low removal efficiency for dissolved solid pollutants; secondly, chemical precipitation may introduce new pollution sources; and finally, while membrane separation can effectively remove ions, it has high energy consumption and is prone to secondary pollution.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid, comprising a sedimentation tank (1), a stirring assembly (2), a first filter (5), a third crystallization reactor (11), and a second heat exchanger (9), characterized in that: The sedimentation tank (1) has holes on both sides of its surface. Two sets of hinges (13) are provided on the surface of each set of holes. Baffles (12) are fixedly connected to the surfaces of the two sets of hinges (13). First connecting plates (14) are fixedly connected to the surfaces of the two sets of baffles (12). Second connecting plates (15) are fixedly connected to both ends of the surface of the sedimentation tank (1). Positioning pins (16) are detachably connected between the first connecting plates (14) and the second connecting plates (15). The stirring assembly (2) is located inside the sedimentation tank (1). A debris removal assembly (3) is provided on one side of the surface of the stirring assembly (2), and a cleaning assembly (4) is provided on the other side of the surface of the stirring assembly (2). The stirring assembly (2) includes a motor (201), a fixed plate (205), a transmission belt (212), and a stirring rod (209). The motor (201) is fixedly connected to one side of the sedimentation tank (1), and the fixed plate (205) is fixedly connected to the other side of the sedimentation tank (1). A first rotating shaft (204) is fixedly connected to the upper surface of the fixed plate (205). A connecting rod (203) is fixedly connected to both the rotating shaft and the output end of the motor (201). A first transmission wheel (202) is fixedly connected to one end of each of the two sets of connecting rods (203). A support plate (206) is fixedly connected between both sides of the inner wall of the sedimentation tank (1). Both ends of the surface of the support plate (206) are movably connected to... Hollow tubes (208), with a second drive wheel (207) fixedly connected to one end of each of the two sets of hollow tubes (208); the drive belt (212) is connected to the surfaces of the two sets of first drive wheels (202) and the two sets of second drive wheels (207); several sets of stirring rods (209) are fixedly connected to one end of each of the two sets of hollow tubes (208); several sets of drain pipes (210) are fixedly connected to one side of each of the several sets of stirring rods (209); the hollow tubes (208), stirring rods (209) and drain pipes (210) are connected and are used together for the injection and discharge of flocculant liquid; a first gear (212) is fixedly connected to one end of each of the two sets of hollow tubes (208). 11); The impurity removal component (3) includes a first sliding shell (303), a spring plate (304) and a movable shell (301). Two sets of the first sliding shells (303) are fixedly connected to the bottom sides of the sedimentation tank (1). A top plate (302) is movably connected inside the two sets of the first sliding shells (303). A first toothed plate (307) is movably connected to the surface of the two sets of top plates (302). The first toothed plate (307) is meshed with one side of the first gear (211). Two sets of spring plates (304) are fixedly connected between the corresponding top plate (302) and the first toothed plate (307). A push rod (306) is fixedly connected to one end of one side of the surface of the two sets of top plates (302).Two sets of top plates (302) are each fixedly connected to one end of a sphere (305). Two sets of movable shells (301) are respectively movably connected to the surfaces of the two sets of spheres (305), and the two sets of movable shells (301) are respectively fixedly connected to both ends of one side of the inner wall of the baffle (12). The cleaning component (4) includes a second rotating shaft (401), a third gear (403), a slide rod (408), and a scraper (405). Two sets of second rotating shafts (401) are respectively rotatably connected to both sides of the bottom of the sedimentation tank (1). Two sets of second rotating shafts (401) are each fixedly connected to the upper surface of the two sets of second rotating shafts (401). Two sets of third gears (403) are respectively fixedly connected to the upper surface of the two sets of second gears (402). The third gear (403) is meshed with the first gear (211) on the other side; the four sets of sliding rods (408) are respectively fixedly connected to the bottom of the sedimentation tank (1) near the second gear (402), and spring rods (409) are fixedly connected to one side of the surface of each of the four sets of sliding rods (408). The piston ends of the corresponding two sets of spring rods (409) are fixedly connected to the second sliding shell (407). The surfaces of the two sets of second sliding shells (407) are movably connected to the second toothed plates (404). The two sets of scrapers (405) are respectively fixedly connected to one end of the surfaces of the two sets of second toothed plates (404). The interiors of the two sets of second toothed plates (404) are movably connected to the inclined plates (406). When the motor 201 is running, one set of connecting rods 203 drives one set of first transmission wheels 202 to rotate. Then, the transmission belt 212 drives another set of first transmission wheels 202 and another set of connecting rods 203 to rotate on the surface of the first rotating shaft 204. This also drives the second transmission wheel 207 to rotate inside the support plate 206 via the hollow tube 208. The first gear 211 also rotates along with the hollow tube 208. As the first gear 211 rotates, it drives the first toothed plate 307 to push forward. When the baffle 12 is closed and locked, it is not pushed open by the top plate 302. Therefore, the first toothed plate 307 moves forward and continuously presses against the spring 304. When the first toothed plate 307... After moving to a certain position, since one side of the first toothed plate 307 has no teeth, the first gear 211 will only continuously push the first toothed plate 307, but the first toothed plate 307 will not continue to move forward. When the baffle 12 is opened, the first toothed plate 307 will use the spring piece 304 to drive the top plate 302 to move forward, thereby pushing the baffle 12 open. As the first gear 211 rotates, it will drive the third gear 403 and the second gear 402 to rotate using the second rotating shaft 401. At this time, the second toothed plate 404 will drive the scraper 405 to move at the bottom of the sedimentation tank 1 and push the impurities out from the position of the baffle 12. Throughout the process, the inclined plate 406 is always in a movable connection with the second toothed plate 404.

2. The wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid as described in claim 1, characterized in that: The stirring component (2) is used to mix and stir the flocculant liquid and the fracturing flowback fluid. The impurity removal component (3) is used to discharge impurities inside the sedimentation tank (1). The cleaning component (4) is used to collect and clean the internal impurities. The first filter (5) is fixedly connected to one side of the surface of the sedimentation tank (1).

3. The wastewater treatment system for targeted removal of scale ions from fracturing flowback fluid as described in claim 1, characterized in that: A first heat exchanger (6) is fixedly connected to one side of the surface of the first filter (5), a first crystallization reactor (7) is fixedly connected to one side of the surface of the first heat exchanger (6), a second crystallization reactor (10) is fixedly connected to one side of the surface of the first crystallization reactor (7), a third crystallization reactor (11) is fixedly connected to one side of the surface of the second crystallization reactor (10), a second filter (8) is fixedly connected to one side of the surface of the third crystallization reactor (11), and a second heat exchanger (9) is fixedly connected to one side of the surface of the second filter (8).

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