Wastewater treatment system for directionally removing scaling ions in fracturing flow-back fluid

Abstract

The invention discloses a wastewater treatment system for directionally removing fracturing flow-back fluid scaling ions, the wastewater treatment system comprises a sedimentation tank, a stirring assembly, a first filter, a third crystallization reactor and a second heat exchanger, holes are formed in two sides of the surface of the sedimentation tank, two groups of hinges are arranged on the surfaces of the two groups of holes, and the second heat exchanger is connected with the first filter; the surfaces of the two corresponding groups of hinges are jointly and fixedly connected with baffles, and the two sides of the surfaces of the two groups of baffles are fixedly connected with first connecting plates, so that residual liquid in the sedimentation tank possibly overflows and flows to clothes and shoes of workers, and when the baffles are jacked open by the impurity removal assembly, the cleaning assembly is driven to be associated with the stirring assembly, and the stirring assembly is driven to rotate; therefore, the cleaning assembly can clean impurities at the bottom in the sedimentation tank with the stirring assembly as power, the cleaning efficiency is improved, and the effect of effectively improving the wastewater treatment efficiency is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a wastewater treatment system for directionally removing scaling ions in fracturing flowback fluid. Background Art

[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 produce 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] At present, common treatment technologies mainly include physical filtration, chemical precipitation and membrane separation. Physical filtration intercepts larger particle impurities through filter screens or sand and gravel layers; chemical precipitation uses specific agents to make certain metal ions in the solution form insoluble substances and precipitate; membrane separation relies on semipermeable membranes to intercept target ions. However, these traditional treatment technologies generally have problems such as high equipment investment costs, complex operation and maintenance, and difficulty in achieving ideal purification effects.

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

[0005] The object of the present invention is to provide a wastewater treatment system for directional removal of scaling ions in fracturing flowback fluid, so as to solve the problems raised in the above background technology.

[0006] The present invention is achieved in this way. A wastewater treatment system for directional removal of scaling ions in fracturing return fluid comprises a sedimentation tank, a stirring component, a first filter, a third crystallization reactor and a second heat exchanger. Holes are provided on both sides of the surface of the sedimentation tank, and two groups of hinges are provided on the surfaces of the two groups of holes. The corresponding two groups of hinge surfaces are commonly fixedly connected with baffles, and both sides of the two groups of baffle surfaces are fixedly connected with first connecting plates. Both ends of the two sides of the surface of the sedimentation tank are fixedly connected with second connecting plates, and a corresponding group of first connecting plates and second connecting plates are commonly detachably connected with positioning pins. The stirring component is arranged inside the sedimentation tank, and a debris removal component is provided on one side of the surface of the stirring component, and a cleaning component is provided on the other side of the surface of the stirring component. The mixing component is used for mixing and stirring the flocculant liquid and the fracturing return fluid, the impurity removal component is used for discharging impurities inside the sedimentation tank, and the cleaning component is used for collecting and cleaning internal impurities. The first filter is fixedly connected to one side of the sedimentation tank surface, the first filter surface is fixedly connected to a first heat exchanger, the first heat exchanger surface is fixedly connected to a first crystallization reactor, the first crystallization reactor surface is fixedly connected to a second crystallization reactor, the third crystallization reactor is fixedly connected to one side of the second crystallization reactor surface, the third crystallization reactor surface is fixedly connected to a second filter, and the second heat exchanger is fixedly connected to one side of the second filter surface.

[0007] As 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 the upper surface of the fixed plate is fixedly connected to a first rotating shaft.

[0008] As a preferred embodiment of the present invention, the rotating shaft and the output end of the motor are both fixedly connected with connecting rods, and one end of the two groups of connecting rods are both fixedly connected with the first transmission wheel.

[0009] As a preferred embodiment of the present invention, a support plate is fixedly connected between both sides of the inner wall of the sedimentation tank, both ends of the support plate surface are movably connected with hollow tubes, and one end of the two groups of hollow tube surfaces are fixedly connected with a second transmission wheel.

[0010] As a preferred embodiment of the present invention, the transmission belt is commonly connected to the surfaces of two groups of first transmission wheels and two groups of second transmission wheels, several groups of stirring rods are respectively fixedly connected to one end of the surfaces of two groups of hollow tubes, one side of the surfaces of several groups of stirring rods are fixedly connected to several groups of drainage pipes, the hollow tubes, stirring rods and drainage pipes are connected and the interiors are commonly used for the injection and discharge of flocculant liquid, and one end of the surfaces of two groups of hollow tubes are fixedly connected to the first gear.

[0011] As a preferred embodiment of the present invention, the impurity removal component includes a first sliding shell, a spring and a movable shell, two groups of the first sliding shells are respectively fixedly connected to the two sides of the bottom of the sedimentation tank, and the two groups of the first sliding shells are movably connected with a top plate.

[0012] As a preferred embodiment of the present invention, the two groups of top plate surfaces are movably connected with a first tooth plate, the first tooth plate is meshingly connected to one side of the first gear, the two groups of spring plates are respectively fixedly connected between the corresponding top plate and the first tooth plate, and one end of one side of the two groups of top plate surfaces is fixedly connected with a push rod.

[0013] As a preferred embodiment of the present invention, one end of the two groups of top plate surfaces are fixedly connected with a sphere, the two groups of movable shells are movably connected to the two groups of sphere surfaces, and the two groups of movable shells are fixedly connected to two ends of one side of the baffle inner wall.

[0014] As a preferred embodiment of the present invention, the cleaning assembly includes a second rotating shaft, a third gear, a sliding rod and a scraper, two groups of the second rotating shafts are respectively rotatably connected to the two sides of the bottom of the sedimentation tank, the upper surfaces of the two groups of the second rotating shafts are fixedly connected with second gears, the two groups of the third gears are respectively fixedly connected to the upper surfaces of the two groups of second gears, and the third gear is meshingly connected to the other side of the first gear.

[0015] As a preferred embodiment of the present invention, the four groups of sliding rods are respectively fixedly connected to the bottom of the sedimentation tank close to the second gear side, one side of the surface of the four groups of sliding rods is fixedly connected with a spring pull rod, the piston ends of the corresponding two groups of spring pull rods are commonly fixedly connected with the second sliding shell, the surfaces of the two groups of the second sliding shells are movably connected with the second tooth plates, the two groups of scrapers are respectively fixedly connected to one end of the surfaces of the two groups of second tooth plates, and the insides of the two groups of the second tooth plates are movably connected with inclined plates.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, after the fracturing flowback fluid is injected into the sedimentation tank, since the inside of the stirring assembly can be pre-injected with a flocculant, when the stirring assembly is used to stir the middle and lower part of the fracturing flowback fluid (which can promote the flocculant and the fracturing flowback fluid to be evenly mixed), the flocculant can be discharged into the fracturing flowback fluid at the same time, and then large particles of impurities and part of the suspended matter are removed by natural sedimentation. The precipitated liquid passes through the first filter to further remove fine particles of impurities, improve the quality of the liquid entering the first crystallization reactor, the second crystallization reactor and the third crystallization reactor, provide a crystallization site for the scaling ions in the fracturing flowback fluid, and through a specific induced crystallization technology, the scaling ions are crystallized and precipitated under specific conditions. After passing through the first crystallization reactor, the second crystallization reactor and the third crystallization reactor, the scale ions are crystallized and precipitated. The liquid treated by the crystallization reactor and the third crystallization reactor passes through the second filter to remove residual fine particles and crystal waste residue to ensure the quality of the effluent. At the same time, the effluent can be disinfected. Finally, when the impurities inside the sedimentation tank are removed, the positioning pins are taken out from the first connecting plate and the second connecting plate, and then the impurity removal component uses the stirring component to push the baffle open. Because if the baffle is opened manually, the residual liquid inside the sedimentation tank may overflow and flow onto the clothes and shoes of the staff. When the impurity removal component pushes the baffle open, it will drive the cleaning component to be connected with the stirring component, so that the cleaning component will use the stirring component as the power to clean the impurities at the bottom of the sedimentation tank, improve the cleaning efficiency, and effectively improve the wastewater treatment efficiency.

[0017] 2. The present invention uses one group of connecting rods to drive one group of first transmission wheels to rotate when the motor is running, and then uses the transmission belt to drive another group of first transmission wheels and another group of connecting rods to rotate on the surface of the first rotating shaft, and drives the second transmission wheel to rotate inside the support plate using a hollow tube. Flocculant liquid can be injected into the hollow tube. While the hollow tube drives the stirring rotation, the flocculant liquid will be discharged from the drainage pipe into the fracturing return fluid, thereby accelerating the precipitation of impurities in the fracturing return fluid, and the first gear will also rotate with the rotation of the hollow tube, thereby facilitating the mixing and stirring of the fracturing return fluid in the sedimentation tank, so that the flocculant and impurities are evenly dispersed in the fracturing return fluid, thereby accelerating the precipitation efficiency.

[0018] 3. The present invention drives the first tooth plate to push when the first gear rotates. When the baffle is closed and locked, the baffle will not be pushed open by the top plate, so the first tooth plate will move forward and continuously squeeze the spring plate. When the first tooth plate moves to a certain position, since there is no tooth on one side of the first tooth plate, the first gear will only continuously move the first tooth plate, but the first tooth plate will not continue to move forward. When the baffle is opened, the first tooth plate will use the spring plate to drive the top plate forward, and then push the baffle open, thereby avoiding the residual liquid from flowing onto the staff when the baffle is manually opened.

[0019] 4. The present invention causes the push rod to squeeze the inclined plate when the first tooth plate pushes the top plate forward. Since the surface of the inclined plate is an inclined surface, the inclined plate drives the second tooth plate to slide on the surface of the slide rod using the second sliding shell, so that the second tooth plate is meshed with the second gear. The spring pull rod is used to drive the second sliding shell to reset. As the first gear rotates, the third gear and the second gear are driven to rotate using the second rotating shaft. At this time, the second tooth plate drives the scraper to move at the bottom of the sedimentation tank and pushes impurities out from the position of the baffle. During the whole process, the inclined plate is always movably connected with the second tooth plate, thereby effectively improving the cleaning efficiency of impurities at the bottom of the sedimentation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of a stirring assembly provided in an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of a third gear provided by an embodiment of the present invention; Figure 4 is a schematic diagram of a first gear structure provided by an embodiment of the present invention; Figure 5 is a schematic diagram of a movable shell structure provided by an embodiment of the present invention; Figure 6 It is a schematic diagram of the scraper structure provided by an embodiment of the present invention; Figure 7 is a schematic diagram of a first sliding shell structure provided by an embodiment of the present invention; Figure 8 is a schematic diagram of the baffle structure provided by an embodiment of the present invention; Fig. 9 is a schematic diagram of a positioning pin structure provided by an embodiment of the present invention; Fig.10 It is a schematic diagram of a processing flow provided by an embodiment of the present invention.

[0021] In the figure: 1, sedimentation tank; 2, stirring 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, stirring rod; 210, drainage 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 tooth plate; 4, cleaning management component; 401, second rotating shaft; 402, second gear; 403, third gear; 404, second tooth plate; 405, scraper; 406, inclined plate; 407, second sliding shell; 408, sliding rod; 409, spring pull 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 DESCRIPTION

[0022] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0023] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0024] like Figures 1 to 10As shown, a wastewater treatment system for directional removal of scaling ions in fracturing return fluid provided by an embodiment of the present invention comprises 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 provided on both sides of the surface of the sedimentation tank 1, two groups of hinges 13 are provided on the surfaces of the two groups of holes, baffles 12 are fixedly connected to the surfaces of the two groups of hinges 13, first connecting plates 14 are fixedly connected to the surfaces of the two groups of baffles 12, second connecting plates 15 are fixedly connected to both ends of the surface of the sedimentation tank 1, and positioning pins 16 are detachably connected between a corresponding group of first connecting plates 14 and the second connecting plates 15, the stirring assembly 2 is arranged inside the sedimentation tank 1, a de-impurity assembly 3 is provided on one side of the surface of the stirring assembly 2, and the surface of the stirring assembly 2 A cleaning component 4 is provided on the other side, the stirring component 2 is used to mix and stir the flocculant liquid and the fracturing return fluid, the impurity removal component 3 is used to discharge impurities inside the sedimentation tank 1, and the cleaning component 4 is used to collect and clean internal impurities. The first filter 5 is fixedly connected to one side of the surface of the sedimentation tank 1, the first filter 5 is fixedly connected to one side of the surface of the first heat exchanger 6, the first heat exchanger 6 is fixedly connected to one side of the surface, the first crystallization reactor 7 is fixedly connected to one side of the surface of the first crystallization reactor 7, the second crystallization reactor 10 is fixedly connected to one side of the surface of the first crystallization reactor 7, the third crystallization reactor 11 is fixedly connected to one side of the surface of the second crystallization reactor 10, the third crystallization reactor 11 is fixedly connected to one side of the surface of the second filter 8, and the second heat exchanger 9 is fixedly connected to one side of the surface of the second filter 8.

[0025] The above scheme is adopted: after the fracturing return fluid is injected into the sedimentation tank 1, since the flocculant can be injected into the stirring component 2 in advance, when the stirring component 2 is used to stir the lower part of the fracturing return fluid (which can promote the uniform mixing of the flocculant and the fracturing return fluid), the flocculant can be discharged into the fracturing return fluid at the same time, and then the larger particles of impurities and part of the suspended matter are removed by natural sedimentation. The precipitated liquid passes through the first filter 5 to further remove the fine particles of impurities, improve the quality of the liquid entering the first crystallization reactor 7, the second crystallization reactor 10 and the third crystallization reactor 11, provide a crystallization site for the scaling ions in the fracturing return fluid, and through a specific induced crystallization technology (adjusting the solution pH The scaling ions in the fracturing return fluid are crystallized by adjusting the value, controlling the temperature, adding crystal seeds or using electromagnetic fields, so as to create crystallization conditions for the scaling ions in the fracturing return fluid, promote their crystallization and precipitation, so as to efficiently remove the scaling ions, reduce the use of chemical agents, and recover the crystallized products), so that the scaling ions are crystallized and precipitated under specific conditions, and the liquid 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 the remaining fine particles and crystal waste residues to ensure the quality of the effluent, and the effluent can be disinfected at the same time. Finally, when the impurities inside the sedimentation tank 1 are removed , remove the positioning pin 16 from the first connecting plate 14 and the second connecting plate 15, and then use the stirring component 2 to push the baffle 12 open with the impurity removal component 3. If the baffle 12 is opened manually, the residual liquid in the sedimentation tank 1 may overflow and get on the clothes and shoes of the staff. When the impurity removal component 3 pushes the baffle 12 open, 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 the power to clean the impurities at the bottom of the sedimentation tank 1, thereby improving the cleaning efficiency and achieving the effect of effectively improving the wastewater treatment efficiency.

[0026] 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. The upper surface of the fixed plate 205 is fixedly connected to a first rotating shaft 204; the rotating shaft and the output end of the motor 201 are fixedly connected to a connecting rod 203, and one end of the two sets of connecting rods 203 are fixedly connected to a first transmission wheel 202; a support plate 206 is fixedly connected between both sides of the inner wall of the sedimentation tank 1, and hollow tubes 208 are movably connected to both ends of the surface of the support plate 206. One end of the surface of the two groups of hollow tubes 208 is fixedly connected with the second transmission wheel 207; the transmission belt 212 is commonly connected to the surface of the two groups of first transmission wheels 202 and the two groups of second transmission wheels 207, several groups of stirring rods 209 are respectively fixedly connected to one end of the surface of the two groups of hollow tubes 208, and one side of the surface of several groups of stirring rods 209 is fixedly connected with several groups of drainage pipes 210, the hollow tubes 208, the stirring rods 209 are connected with the drainage pipes 210 and the interior is commonly used for the injection and discharge of flocculant liquid, and one end of the surface of the two groups of hollow tubes 208 is fixedly connected with the first gear 211.

[0027] The above scheme is adopted: when the motor 201 is running, one group of connecting rods 203 will be used to drive one group of first transmission wheels 202 to rotate, and then the transmission belt 212 will be used to drive another group of first transmission wheels 202 and another group of connecting rods 203 to rotate on the surface of the first rotating shaft 204, and the second transmission wheel 207 will be driven to rotate inside the support plate 206 using the hollow tube 208. Flocculant liquid can be injected into the hollow tube 208. While the hollow tube 208 drives the stirring rotation, the flocculant liquid will be discharged from the discharge pipe 210 into the fracturing return fluid, thereby accelerating the precipitation of impurities in the fracturing return fluid, and the first gear 211 will also rotate with the rotation of the hollow tube 208, so as to facilitate the mixing and stirring of the fracturing return fluid in the sedimentation tank 1, so that the flocculant and impurities are evenly dispersed in the fracturing return fluid, and the precipitation efficiency is accelerated.

[0028] refer to Figure 5 and Figure 7The impurity removal component 3 includes a first sliding shell 303, a spring piece 304 and a movable shell 301. The two groups of first sliding shells 303 are respectively fixedly connected to the two sides of the bottom of the sedimentation tank 1, and the two groups of first sliding shells 303 are movably connected to the top plate 302; the surfaces of the two groups of top plates 302 are movably connected to the first tooth plate 307, and the first tooth plate 307 is meshed with one side of the first gear 211. The two groups of spring pieces 304 are respectively fixedly connected between the corresponding top plates 302 and the first tooth plate 307, and one end of one side of the surface of the two groups of top plates 302 is fixedly connected to the push rod 306; one end of the surface of the two groups of top plates 302 is fixedly connected to the ball 305, the two groups of movable shells 301 are respectively movably connected to the surfaces of the two groups of balls 305, and the two groups of movable shells 301 are respectively fixedly connected to the two ends of one side of the inner wall of the baffle 12.

[0029] The above scheme is adopted: when the first gear 211 rotates, it will drive the first tooth plate 307 to push. When the baffle 12 is closed and locked, the baffle 12 will not be pushed open by the top plate 302, so the first tooth plate 307 will move forward and continuously squeeze the spring plate 304. When the first tooth plate 307 moves to a certain position, since there is no tooth on one side of the first tooth plate 307, the first gear 211 will only continuously move the first tooth plate 307, but the first tooth plate 307 will not continue to move forward. When the baffle 12 is opened, the first tooth plate 307 will use the spring plate 304 to drive the top plate 302 forward, and then push the baffle 12 open, thereby avoiding the residual liquid from flowing onto the staff when the baffle 12 is manually opened.

[0030] refer to Figure 3 , Figure 5 and Figure 6 The cleaning assembly 4 includes a second rotating shaft 401, a third gear 403, a sliding rod 408 and a scraper 405. The two groups of second rotating shafts 401 are respectively rotatably connected to the two sides of the bottom of the sedimentation tank 1. The upper surfaces of the two groups of second rotating shafts 401 are fixedly connected with the second gears 402. The two groups of third gears 403 are respectively fixedly connected to the upper surfaces of the two groups of second gears 402, and the third gears 403 are meshed and connected with the other side of the first gear 211; the four groups of sliding rods 408 are respectively fixedly connected to the bottom of the sedimentation tank 1 near the second gear 402. One side of the surface of the four groups of sliding rods 408 is fixedly connected with a spring pull rod 409, and the piston ends of the corresponding two groups of spring pull rods 409 are commonly fixedly connected with a second sliding shell 407; the surfaces of the two groups of second sliding shells 407 are movably connected with the second toothed plates 404, the two groups of scrapers 405 are respectively fixedly connected to one end of the surfaces of the two groups of second toothed plates 404, and the insides of the two groups of second toothed plates 404 are movably connected with inclined plates 406.

[0031] The above scheme is adopted: when the first tooth 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 an inclined surface, the inclined plate 406 will drive the second tooth plate 404 to slide on the surface of the sliding rod 408 using the second sliding shell 407, so that the second tooth plate 404 is meshed with the second gear 402, and the spring pull rod 409 is used to drive the second sliding shell 407 to reset. As the first gear 211 rotates, the third gear 403 and the second gear 402 will be driven to rotate using the second rotating shaft 401. At this time, the second tooth 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. During the whole process, the inclined plate 406 is always movably connected with the second tooth plate 404, thereby effectively improving the cleaning efficiency of the impurities at the bottom of the sedimentation tank 1.

[0032] Working principle of the present invention: When in use, when the motor 201 is running, one of the connecting rods 203 will be used to drive one of the first transmission wheels 202 to rotate, and then the transmission belt 212 will be used to drive another group of first transmission wheels 202 and another group of connecting rods 203 to rotate on the surface of the first rotating shaft 204, and the second transmission wheel 207 will be driven to rotate inside the support plate 206 using the hollow tube 208. The hollow tube 208 can be injected with flocculant liquid. While the hollow tube 208 drives the stirring rotation, the flocculant liquid will be discharged from the drainage The first gear 211 will also rotate along with the rotation of the hollow tube 208. When the first gear 211 rotates, it will drive the first tooth plate 307 to push. When the baffle 12 is closed and locked, the baffle 12 will not be pushed away by the top plate 302, so the first tooth plate 307 will move forward and continuously squeeze the spring piece 304. When the first tooth plate 307 moves to a certain position, since there is no one side of the first tooth plate 307, the first tooth plate 307 will not move forward. The first gear 211 has teeth, so the first gear 211 will only continuously move the first tooth plate 307, but the first tooth plate 307 will not continue to move forward. When the baffle 12 is opened, the first tooth plate 307 will use the spring piece 304 to drive the top plate 302 to move forward, and then push the baffle 12 open. When the first tooth 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 an inclined surface, the inclined plate 406 will drive the second tooth plate 404 to use the second sliding shell 4 07 slides on the surface of the slide rod 408, so that the second tooth plate 404 is engaged with the second gear 402, and the spring pull rod 409 is used to drive the second sliding shell 407 to reset. As the first gear 211 rotates, the third gear 403 and the second gear 402 are driven to rotate using the second rotating shaft 401. At this time, the second tooth 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. During the whole process, the inclined plate 406 always maintains a movable connection with the second tooth plate 404.

[0033] In summary: this wastewater treatment system for directional removal of scaling ions in fracturing return fluid, through the structure of the second rotating shaft 401, the second gear 402, the third gear 403, the second tooth plate 404, the scraper 405, the inclined plate 406, the second sliding shell 407, the sliding rod 408 and the spring pull rod 409, solves the following problems: first, the physical filtration method has a low removal efficiency for soluble solid pollutants; second, the chemical precipitation method may introduce new pollution sources; finally, although the membrane separation method can effectively remove ions, it has a high energy consumption and is prone to secondary pollution.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater treatment system for directional removal of scaling 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: Holes are provided on both sides of the surface of the sedimentation tank (1), and two groups of hinges (13) are provided on the surfaces of the two groups of holes. The surfaces of the two groups of hinges (13) are fixedly connected with baffles (12) on both sides, and the surfaces of the two groups of baffles (12) are fixedly connected with first connecting plates (14) on both sides. The surfaces of the sedimentation tank (1) are fixedly connected with second connecting plates (15) at both ends, and a positioning pin (16) is detachably connected between the first connecting plates (14) and the second connecting plates (15) of the corresponding group. The stirring component (2) is arranged inside the sedimentation tank (1), and a debris removal component (3) is provided on one side of the surface of the stirring component (2), and a cleaning component (4) is provided on the other side of the surface of the stirring component (2). The stirring component (2) is used to mix and The impurity removal component (3) is used to discharge impurities inside the sedimentation tank (1), and 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), and the first heat exchanger (6) is fixedly connected to one side of the surface of the first filter (5). The first heat exchanger (6) is fixedly connected to one side of the surface of the first crystallization reactor (7), and the first crystallization reactor (7) is fixedly connected to one side of the surface of the second crystallization reactor (10). The third crystallization reactor (11) is fixedly connected to one side of the surface of the second crystallization reactor (10), and the second filter (8) is fixedly connected to one side of the surface of the third crystallization reactor (11). The second heat exchanger (9) is fixedly connected to one side of the surface of the second filter (8).

2. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid according to claim 1, characterized in that: The stirring assembly (2) comprises 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); the fixed plate (205) is fixedly connected to the other side of the surface of the sedimentation tank (1); and a first rotating shaft (204) is fixedly connected to the upper surface of the fixed plate (205).

3. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 2, characterized in that: The rotating shaft and the output end of the motor (201) are both fixedly connected with connecting rods (203), and one end of the two groups of connecting rods (203) are both fixedly connected with the first transmission wheel (202).

4. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 1, characterized in that: 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), and second transmission wheels (207) are fixedly connected to one end of the surfaces of two groups of hollow tubes (208).

5. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 2, characterized in that: The transmission belt (212) is commonly connected to the surfaces of the two groups of first transmission wheels (202) and the two groups of second transmission wheels (207); a plurality of groups of stirring rods (209) are respectively fixedly connected to one end of the surfaces of the two groups of hollow tubes (208); one side of the surfaces of the plurality of groups of stirring rods (209) is fixedly connected to a plurality of drainage pipes (210); the hollow tubes (208), stirring rods (209) and drainage pipes (210) are connected and their interiors are commonly used for the injection and discharge of flocculant liquid; one end of the surfaces of the two groups of hollow tubes (208) is fixedly connected to a first gear (211).

6. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 5, characterized in that: The impurity removal component (3) comprises a first sliding shell (303), a spring piece (304) and a movable shell (301), two groups of the first sliding shells (303) are respectively fixedly connected to the two sides of the bottom of the sedimentation tank (1), and the top plate (302) is movably connected inside the two groups of the first sliding shells (303).

7. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 6, characterized in that: The surfaces of the two groups of top plates (302) are movably connected with a first tooth plate (307), and the first tooth plate (307) is meshingly connected with one side of the first gear (211). The two groups of spring plates (304) are respectively fixedly connected between the corresponding top plates (302) and the first tooth plate (307), and one end of one side of the surface of the two groups of top plates (302) is fixedly connected with a push rod (306).

8. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 6, characterized in that: One end of the surface of the two groups of top plates (302) is fixedly connected to a sphere (305), the two groups of movable shells (301) are respectively movably connected to the surfaces of the two groups of spheres (305), and the two groups of movable shells (301) are respectively fixedly connected to the two ends of one side of the inner wall of the baffle (12).

9. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid as claimed in claim 5, characterized in that: The cleaning assembly (4) comprises a second rotating shaft (401), a third gear (403), a sliding rod (408) and a scraper (405); two groups of the second rotating shafts (401) are rotatably connected to the two sides of the bottom of the sedimentation tank (1), respectively; the upper surfaces of the two groups of the second rotating shafts (401) are fixedly connected to the second gears (402); the two groups of the third gears (403) are fixedly connected to the upper surfaces of the two groups of the second gears (402), respectively; and the third gears (403) are meshingly connected to the other side of the first gear (211).

10. A wastewater treatment system for directional removal of scaling ions from fracturing flowback fluid according to claim 9, characterized in that: The four groups of sliding rods (408) are respectively fixedly connected to the bottom of the sedimentation tank (1) near the second gear (402); one side of the surface of the four groups of sliding rods (408) is fixedly connected with a spring pull rod (409); the piston ends of the corresponding two groups of spring pull rods (409) are commonly fixedly connected with a second sliding shell (407); the surfaces of the two groups of the second sliding shells (407) are movably connected with a second tooth plate (404); the two groups of scrapers (405) are respectively fixedly connected to one end of the surface of the two groups of the second tooth plates (404); the insides of the two groups of the second tooth plates (404) are movably connected with an inclined plate (406).

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