High-hardness wastewater recycling treatment device and treatment method

Abstract

The application discloses a high-hardness wastewater circulating treatment device and a treatment method. The device comprises a container and a circulating separator. The circulating separator is located in the container. The circulating separator comprises a horizontal pipe, an inner cylinder and a filter screen. The horizontal pipe is horizontally arranged in the axial direction and is open at both ends. Upper and lower openings are respectively arranged on the upper and lower sides of the horizontal pipe. The inner cylinder is rotationally connected to the horizontal pipe and the rotation axis is coaxial with the horizontal pipe. The axis of the inner cylinder is perpendicular to the axis of the horizontal pipe. The axial ends of the inner cylinder are open. During the rotation of the inner cylinder in the horizontal pipe, the two open ends of the inner cylinder can be reversed. The filter screen is arranged in the inner cylinder and is used for filtering the liquid flowing through the inner cylinder. The application can effectively treat high-hardness wastewater.

Description

Technical Field

[0001] This invention relates to the field of water treatment technology, and more specifically, to a high-hardness wastewater recycling treatment device and a high-hardness wastewater recycling treatment method. Background Technology

[0002] High-hardness wastewater often contains high levels of metal ions such as calcium and magnesium. Treatment typically involves adding reagents to the wastewater to react and form precipitates, such as calcium precipitates. These precipitates are then separated by filtration. The treatment process usually employs a reaction-then-filtration approach, with two separate steps. The waiting time between these two steps reduces treatment efficiency.

[0003] During the filtration and separation process, the precipitates formed by the reaction in the wastewater will be blocked on the water-facing side of the filter screen. As the reaction continues, the water-facing side of the filter screen is easily blocked, resulting in a decrease in the filtration efficiency of the filter screen.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a high-hardness wastewater recycling treatment device and treatment method, which can effectively block and separate sediments in high-hardness wastewater and treat high-hardness wastewater.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-hardness wastewater recycling treatment device includes a container and a recycling separator. The recycling separator is located in the container and includes a horizontal pipe, an inner cylinder, and a filter screen. The horizontal pipe is horizontal in axis and open at both ends. The upper and lower sides of the horizontal pipe have opposing upper and lower openings, respectively. The inner cylinder is rotatably connected inside the horizontal pipe, and its rotation axis is coaxial with the horizontal pipe. The axis of the inner cylinder is perpendicular to the axis of the horizontal pipe, and both ends of the inner cylinder are open. During rotation within the horizontal pipe, the two open ends of the inner cylinder can be reversed. The filter screen is located inside the inner cylinder and is used to filter the liquid flowing through it.

[0008] The invention is further configured such that a sliding sleeve is fitted around the inner circumference of the inner cylinder, and the filter screen is fixedly installed at the middle position of the inner circumference of the sliding sleeve. The sliding sleeve is a floating object, and the sliding sleeve can carry the filter screen to float and slide upward.

[0009] The invention is further configured such that an annular groove is formed on the inner circumference of the inner cylinder, and the outer circumference of the sliding sleeve is embedded in the groove; a plurality of through grooves are formed on the outer circumference of the inner cylinder, the through grooves connecting the inside and outside of the inner cylinder and located within the range of the groove; the sliding sleeve floats upward and slides to the uppermost position, and the sliding sleeve closes the through groove on the upper side of the filter screen.

[0010] The present invention is further configured such that the through grooves are distributed on both sides of the inner cylinder body near the rotation axis of the inner cylinder body.

[0011] The invention is further configured such that the horizontal tube has a conical structure, the two end faces of the inner cylinder are adapted to the inner circumferential surface of the horizontal tube, and the inner cylinder can move along the axial direction of the horizontal tube.

[0012] The invention is further configured to include a spring, which elastically acts on the inner cylinder to elastically push the inner cylinder from the large end to the small end of the horizontal tube, and the two end faces of the inner cylinder can press and seal against the inner circumferential surface of the horizontal tube.

[0013] The invention is further configured such that a linkage shaft is fixedly connected to both sides of the inner cylinder, and the linkage shaft is coaxially arranged with the horizontal tube; a rotating frame is fixedly connected to the inner circumference of the horizontal tube for rotatably supporting the linkage shaft.

[0014] The present invention is further configured such that the linkage shaft includes a first end and a second end, the first end and the second end of the linkage shaft being located on both sides of the inner cylinder respectively; it also includes a rotary driver and a linear driver, the rotary driver being connected to the first end of the linkage shaft through a connector one for driving the linkage shaft to rotate axially; the linear driver being connected to the second end of the linkage shaft through a connector two for driving the linkage shaft to move axially.

[0015] The invention is further configured such that the circulating separator also includes an upper riser, the lower end of which is connected to an upper opening, and a propeller is provided inside the upper riser for pushing water downward inside the upper riser; the lower opening is connected to a lower riser, and the lower end of the lower riser extends out of the container.

[0016] The present invention also provides a method for recycling high-hardness wastewater, which uses the treatment equipment described above. The high-hardness wastewater reacts with the treatment reagent in the container. The calcium ions and other metal ions in the high-hardness wastewater react to produce precipitates. The precipitates are aggregated and separated by a recycling separator, thereby reducing the content of calcium ions and other metal ions in the wastewater and achieving the treatment of high-hardness wastewater containing calcium.

[0017] During the water flow process, the propeller rotates, propelling the water in the container into the lower riser and downwards. The water then enters the inner cylinder through the upper opening, passing through a filter screen. The filter screen separates and filters out sediment from the wastewater. The filtered wastewater flows out from under the filter screen, then through a channel on the outside of the inner cylinder, entering the horizontal pipe and flowing out from the openings at both ends, re-entering the container, thus achieving wastewater circulation. During this circulation process, sediment in the wastewater is trapped and accumulates on the upper side of the filter screen. After a period of operation, a certain amount of sediment accumulates on the upper side of the filter screen. Then, the inner cylinder rotates, inverting the inner cylinder. The sediment that was originally on the upper side of the filter screen falls to the lower side and into the lower riser, where it accumulates and is then discharged.

[0018] In summary, the present invention has the following beneficial effects:

[0019] By using a rotatable inner cylinder with a filter screen installed inside, the filter screen can be flipped over during the rotation and inversion of the inner cylinder. After the filter screen flips over, the water flow through the filter screen will also reverse. During the subsequent water flow, the filter screen can be backwashed, causing the sediment attached to the lower side (originally the upper side) of the filter screen to be washed off, thus avoiding the filter screen from becoming clogged.

[0020] By employing an upward-floating sliding sleeve with a filter screen installed inside, the sliding sleeve can float and drive the filter screen upward. Moreover, after the sliding sleeve moves upward, it can close the through groove on the upper side of the filter screen, while opening the through groove on the upper side of the filter screen, thereby allowing wastewater to flow through the lower side of the filter screen and out of the inner cylinder. This allows the wastewater to circulate between the inner cylinder and the filter screen, enabling sediment in the wastewater to be blocked and separated on the upper side of the filter screen.

[0021] By designing the horizontal tube as a conical structure, the two end faces of the inner cylinder are adapted to the inner circumferential surface of the horizontal tube, forming a matching conical structure at the two end faces of the inner cylinder. The inner cylinder can move axially along the horizontal tube. This movement of the inner cylinder along the axis of the horizontal tube allows the two end faces of the inner cylinder to abut against the inner circumferential surface of the horizontal tube, achieving conical abutment. This ensures stable pressure and centering, guaranteeing a stable and secure seal, thus preventing leakage between the two end faces of the inner cylinder and the inner wall of the horizontal tube, and effectively blocking sediments in wastewater. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a high-hardness wastewater recycling treatment device in this embodiment;

[0023] Figure 2This is a schematic diagram of the circulating separator in this embodiment;

[0024] Figure 3 This is a cross-sectional view of the circulating separator in this embodiment. Figure 1 ;

[0025] Figure 4 This is a three-dimensional sectional view of the circulating separator in this embodiment;

[0026] Figure 5 This is a cross-sectional view of the circulating separator in this embodiment. Figure 2 ;

[0027] Figure 6 This is a cross-sectional view of the circulating separator in this embodiment. Figure 3 .

[0028] Reference numerals: Container 1; Upper vertical pipe 2; Horizontal pipe 3; Upper opening 31; Lower opening 32; Small opening end 33; Large opening end 34; Motor 4; Rotating shaft 41; Propeller 5; Lower vertical pipe 6; Inner cylinder 7; End face 71; Through groove 72; Filter screen 8; Linkage shaft 9; Rotating frame 91; First end 901; Second end 902; Sliding sleeve 10; Sliding groove 101; Rotary driver 11; Connector one 1101; Linear driver 12; Connector two 1201; Spring 13; Protrusion 1301. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This embodiment discloses a high-hardness wastewater recycling treatment device, including a container 1 and a recycling separator. The recycling separator is located in the container 1. The high-hardness wastewater reacts with the treatment reagent in the container 1. The calcium ions and other metal ions in the high-hardness wastewater react to produce precipitates. The recycling separator aggregates and separates the precipitates, thereby reducing the content of calcium ions and other metal ions in the wastewater and achieving the treatment of high-hardness wastewater containing calcium.

[0031] Reference Figures 1-5 As shown, the circulation separator includes a horizontal pipe 3, an inner cylinder 7, and a filter screen 8. The horizontal pipe 3 is horizontal in axis and open at both ends, forming two ports. The upper and lower sides of the horizontal pipe 3 are respectively provided with an upper opening 31 and a lower opening 32, which are directly opposite each other.

[0032] The inner cylinder 7 has a cylindrical structure with open ends. The inner cylinder 7 is rotatably connected to the horizontal tube 3, and its axis of rotation is coaxial with that of the horizontal tube 3; the axis of the inner cylinder 7 is perpendicular to the axis of the horizontal tube 3, and the two ends of the inner cylinder 7 are open, forming two openings. During the rotation of the inner cylinder 7 around the axis of rotation within the horizontal tube 3, the two open ends of the inner cylinder 7 can be reversed.

[0033] The filter screen 8 is located inside the inner cylinder 7 and is used to filter the liquid flowing through the inner cylinder 7. The filter screen 8 filters and collects the sediment in the wastewater on the upper side of the filter screen 8.

[0034] The inner cylinder 7 generally has two inverted states, with both openings of the inner cylinder 7 facing vertically, respectively opposite to the upper opening 31 and lower opening 32 of the horizontal pipe 3. Circulating wastewater enters from the upper opening 31 of the horizontal pipe 3 and enters the inner cylinder 7. After passing through the filter screen 8, the sediment in the wastewater can be filtered and blocked on the upper side of the filter screen 8.

[0035] As the reaction proceeds, sediment continuously accumulates on the upper side of filter screen 8. By rotating the inner cylinder 7, the two ports of the inner cylinder 7 can be inverted, and the filter screen 8 inside the inner cylinder 7 will also flip. The sediment that was originally accumulated on the upper side of filter screen 8 can leave from the lower port of the inner cylinder 7 and exit from the lower opening 32 of the horizontal pipe 3. After the filter screen 8 is flipped, there is almost no sediment on the upper side of filter screen 8. Moreover, the water flow through filter screen 8 will also be reversed. In the subsequent water flow process, the filter screen 8 can be backwashed, causing the sediment attached to the lower side (originally the upper side) of filter screen 8 to be washed off, thus preventing the filter screen 8 from becoming clogged.

[0036] Linkage shafts 9 are fixedly connected to both sides of the inner cylinder 7, and the linkage shafts 9 are coaxially arranged with the horizontal tube 3. Two sets of rotating frames 91 are fixedly connected to the inner circumference of the horizontal tube 3, which rotatably support the linkage shafts 9. The linkage shafts 9 pass through the rotating frames 91 to achieve stable rotational adjustment. The end of the linkage shaft 9 is connected to the rotary driver 11. The rotary driver 11 drives the rotation of the inner cylinder 7 and the linkage shaft 9, thereby enabling the inner cylinder 7 and the filter screen 8 to rotate and be reversed.

[0037] Reference Figure 1 , Figure 2 As shown, the circulating separator also includes an upper riser 2, the lower end of which is connected to an upper opening 31, and a propeller 5 is installed inside the upper riser 2. A motor 4 is installed on the top of the container 1, and a rotating shaft 41 is installed on the lower part of the motor 4. The rotating shaft 41 extends vertically downward into the upper riser 2, and the rotating shaft 41 can drive the propeller 5 to rotate, thereby pushing water downward inside the upper riser 2 through the propeller 5.

[0038] A lower riser 6 is connected to the lower opening 32. The lower end of the lower riser 6 extends out of the container 1 and can collect the sediment that falls after the inner cylinder 7 is overturned. A valve device is installed at the lower end of the lower riser 6, and the sediment deposited in the lower riser 6 can be discharged by opening and closing the valve device.

[0039] Reference Figure 3 , Figure 5 As shown, a sliding sleeve 10 is fitted around the inner circumference of the inner cylinder 7, and the filter screen 8 is fixedly installed in the middle of the inner circumference of the sliding sleeve 10. The sliding sleeve 10 has a low density, is made of a buoyant material, and is an annular float. The sliding sleeve 10 and the filter screen 8 together have positive buoyancy, and the sliding sleeve 10 can carry the filter screen 8 upward and slide under its own buoyancy.

[0040] Specifically, an annular groove 101 is formed on the inner circumference of the inner cylinder 7, and the outer circumference of the sliding sleeve 10 is embedded in the groove 101. The sliding sleeve 10 and the groove 101 are slidably matched, and the sliding sleeve 10 can slide up and down in the groove 101. Under the action of its own buoyancy, the sliding sleeve 10 can float upward. Moreover, after the inner cylinder 7 is rotated and inverted, the sliding sleeve 10 will float upward again under the action of its own buoyancy.

[0041] Furthermore, several through grooves 72 are formed on the outer periphery of the inner cylinder 7. The through grooves 72 connect the inside and outside of the inner cylinder 7, allowing wastewater inside the inner cylinder 7 to flow out and thus achieve wastewater circulation. The through grooves 72 are located within the range of the sliding groove 101. The opening and closing of the through grooves 72 can be adjusted by the up and down sliding of the sliding sleeve 10. When the sliding sleeve 10 slides to the corresponding position, the through groove 72 at the corresponding position can be blocked.

[0042] When the sliding sleeve 10 floats upward and slides to its uppermost position, the upper end face of the sliding sleeve 10 will abut against the upper end face of the sliding groove 101, thereby limiting the position of the sliding sleeve 10. At the same time, the sliding sleeve 10 can close the through groove 72 on the upper side of the filter screen 8. (Refer to...) Figure 5 The state is shown. During the water flow, the propeller 5 rotates, pushing the water in container 1 into the lower riser 6 and flowing downwards. It then enters the inner cylinder 7 through the upper opening 31, passes through the filter screen 8, which filters and separates the sediment in the wastewater. The filtered wastewater flows out from the bottom of the filter screen 8, then out through the through-groove 72 on the outside of the inner cylinder 7, enters the horizontal pipe 3, and flows out from the openings at both ends of the horizontal pipe 3, re-entering container 1, thus achieving wastewater circulation. During the wastewater circulation process, the sediment in the wastewater will be blocked and accumulated on the upper side of the filter screen 8. After a period of operation, the sediment in the wastewater accumulates to a certain amount on the upper side of the filter screen 8. Then, the inner cylinder 7 rotates, inverting the flow. The sediment originally on the upper side of the filter screen 8 inside the inner cylinder 7 will flip to the lower side, falling into the lower riser 6, where it accumulates. The sediment can then be discharged from the lower riser 6.

[0043] Furthermore, the through grooves 72 are distributed on both sides of the inner cylinder 7 near the rotation axis of the inner cylinder 7, as shown in the figure. Figure 4 As shown. Because the through groove 72 is located near the axis of rotation, it is at a relatively high position during the rotation of the inner cylinder 7. This makes it difficult for sediments inside the inner cylinder 7 to leave through the through groove 72, thus facilitating sediment accumulation in the wastewater. During the rotation of the inner cylinder 7, the end face 71 of the inner cylinder 7 always fits against the inner circumference of the horizontal pipe 3, maintaining the seal between the inside of the horizontal pipe 3 and the port of the inner cylinder 7, thereby ensuring the collection and tumbling out of sediments inside the inner cylinder 7.

[0044] Furthermore, the horizontal tube 3 has a conical structure, and the diameter of the internal cavity of the horizontal tube 3 varies. The two ends form a small end 33 and a large end 34, which gradually expand from the small end 33 to the large end 34 to form a conical internal cavity structure. Moreover, the two end faces 71 of the inner cylinder 7 are adapted to the inner circumferential surface of the horizontal tube 3, and a matching conical structure is also formed at the two end faces 71 of the inner cylinder 7, allowing the inner cylinder 7 to move axially along the horizontal tube 3.

[0045] By moving the inner cylinder 7 along the axis of the horizontal tube 3, the two end faces 71 of the inner cylinder 7 can abut against the inner circumferential surface of the horizontal tube 3, achieving conical abutment, which can achieve pressure centering, ensure that the position of the pressure surface can be stably pressured, and ensure that the pressure surface can stably seal and pressure.

[0046] Reference Figure 6 As shown, a spring 13 is also provided between the linkage shaft 9 and the rotating frame 91 of the horizontal tube 3. The spring 13 is sleeved on the outside of the linkage shaft 9 and can elastically act on the inner cylinder 7, thereby elastically pushing the inner cylinder 7 from the large opening end 34 to the small opening end 33 of the horizontal tube 3. Under the elastic action of the spring 13, the inner cylinder 7 can be pushed, so that the inner cylinder 7 can press against the small opening end 33, and the two end faces 71 of the inner cylinder 7 can press and seal against the inner circumferential surface of the horizontal tube 3.

[0047] Linkage shafts 9 are fixedly connected to both sides of the inner cylinder 7, and the linkage shafts 9 are coaxially arranged with the horizontal tube 3. A rotating frame 91 is fixedly connected to the inner circumference of the horizontal tube 3, and the linkage shafts 9 are rotatably supported by the rotating frame 91, thereby enabling the inner cylinder 7 to be rotatably supported. A protrusion 1301 is fixed to the outer circumference of the linkage shaft 9, and a spring 13 presses against the protrusion 1301 between the spring and the rotating frame 91, thereby providing axial elastic pressure.

[0048] Furthermore, referring to Figure 6As shown, the linkage shaft 9 is divided into two sections, which are fixed to both sides of the inner cylinder 7. The two sides of the linkage shaft 9 are the first end 901 and the second end 902, respectively. The first end 901 and the second end 902 of the linkage shaft 9 are located on both sides of the inner cylinder 7. In addition, the device also has a rotary driver 11 and a linear driver 12. The two drivers, the rotary driver 11 and the linear driver 12, can control the linkage shaft 9 in a coordinated manner, enabling the linkage shaft 9 to rotate and move along its axis.

[0049] Specifically, the rotary driver 11 is connected to the first end 901 of the linkage shaft 9 via connector 1101 to drive the linkage shaft 9 to rotate axially. Moreover, connector 1101 is a structure that can slide axially and rotate in linkage, for example, it can be a sliding key or a square flat sleeve structure. The driving end of the rotary driver 11 can drive the linkage shaft 9 to rotate and can adapt to the axial movement of the linkage shaft 9.

[0050] Additionally, the linear actuator 12 is connected to the second end 902 of the linkage shaft 9 via connector 1201, and is used to drive the linkage shaft 9 to move axially. Connector 1201 enables the driving end of the linear actuator 12 to be axially linked with the second end 902 of the linkage shaft 9, and allows the linkage shaft 9 to rotate smoothly. For example, connector 1201 can adopt a sleeve-shaped structure, with two convex rings fixed on the inner circumference of the sleeve, and two disc-shaped linkage blocks fixed between the two convex rings. The two disc-shaped linkage blocks are respectively connected to the linkage shaft 9 and the linear actuator 12, thereby enabling axial linkage through the linear actuator 12 without affecting the rotation of the linkage shaft 9.

[0051] This embodiment also discloses a method for recycling and treating high-hardness wastewater, using the treatment equipment described above, which can treat high-hardness wastewater. The high-hardness wastewater reacts with the treatment reagent in container 1. Calcium ions and other metal ions in the high-hardness wastewater react to produce precipitates. These precipitates are then collected and separated by a recycling separator, thereby reducing the content of calcium ions and other metal ions in the wastewater and achieving the treatment of calcium-containing high-hardness wastewater.

[0052] During the water flow, the propeller 5 rotates, propelling the water in container 1 into the lower riser 6 and downwards. The water then enters the inner cylinder 7 through the upper opening 31, passing through the filter screen 8. The filter screen 8 filters and separates the sediment in the wastewater. The filtered wastewater flows out from the underside of the filter screen 8, then out through the through-groove 72 on the outside of the inner cylinder 7, entering the horizontal pipe 3. It then flows out from the openings at both ends of the horizontal pipe 3 and re-enters container 1, thus achieving wastewater circulation. During this circulation, sediment in the wastewater is blocked and accumulates on the upper side of the filter screen 8. After a period of operation, a certain amount of sediment accumulates on the upper side of the filter screen 8. Then, the inner cylinder 7 rotates, inverting the flow. The sediment that was originally on the upper side of the filter screen 8 inside the inner cylinder 7 flips to the lower side, falling into the lower riser 6. The sediment accumulates in the lower riser 6 and is then discharged from the lower riser 6.

[0053] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high-hardness wastewater recycling treatment device, characterized in that, The system includes a container (1) and a circulating separator. The circulating separator is located in the container (1). The circulating separator includes a horizontal pipe (3), an inner cylinder (7), and a filter screen (8). The horizontal pipe (3) is horizontal in axial direction and open at both ends. The upper and lower sides of the horizontal pipe (3) are respectively provided with an upper opening (31) and a lower opening (32) facing each other. The inner cylinder (7) is rotatably connected to the horizontal pipe (3), and the axis of rotation is coaxial with the horizontal pipe (3). The axis of the inner cylinder (7) is perpendicular to the axis of the horizontal pipe (3). The axial direction of the inner cylinder (7) is open at both ends. During the rotation of the inner cylinder (7) in the horizontal pipe (3), the two open ends of the inner cylinder (7) can be reversed. The filter screen (8) is located in the inner cylinder (7) and is used to filter the liquid flowing through the inner cylinder (7). The inner cylinder (7) is fitted with a sliding sleeve (10) on its inner circumference. The filter screen (8) is fixedly installed in the middle position of the inner circumference of the sliding sleeve (10). The sliding sleeve (10) is a floating object and can carry the filter screen (8) to float and slide upward. The outer periphery of the inner cylinder (7) is provided with several through grooves (72), and the sliding sleeve (10) floats and slides upward to the uppermost position, and the sliding sleeve (10) closes the through grooves (72) on the upper side of the filter screen (8); The circulating separator also includes an upper riser (2), the lower end of which is connected to an upper opening (31). A propeller (5) is installed inside the upper riser (2), and the propeller (5) is used to push water downward inside the upper riser (2). The lower opening (32) is connected to a lower riser (6), and the lower end of the lower riser (6) extends out of the container (1). The filtered wastewater flows out from the bottom of the filter screen (8), then flows out from the through groove (72) on the outside of the inner cylinder (7), enters the horizontal pipe (3), flows out from the openings at both ends of the horizontal pipe (3), and re-enters the container (1); the inner cylinder (7) rotates to achieve upside down, and the side of the inner cylinder (7) that was originally on the top of the filter screen (8) will be flipped to the bottom, and can fall into the lower riser (6), and then the sediment will be discharged from the lower riser (6).

2. The high-hardness wastewater recycling treatment equipment according to claim 1, characterized in that, The inner cylinder (7) has an annular groove (101) on its inner circumference, and the outer circumference of the sliding sleeve (10) is embedded in the groove (101); the outer circumference of the inner cylinder (7) has several through grooves (72), which connect the inside and outside of the inner cylinder (7) and are located within the range of the groove (101).

3. The high-hardness wastewater recycling treatment equipment according to claim 2, characterized in that, The through grooves (72) are distributed on both sides of the inner cylinder (7) near the rotation axis of the inner cylinder (7).

4. The high-hardness wastewater recycling treatment equipment according to claim 1, characterized in that, The horizontal tube (3) has a conical structure, and the two end faces (71) of the inner cylinder (7) are adapted to the inner circumferential surface of the horizontal tube (3). The inner cylinder (7) can move along the axial direction of the horizontal tube (3).

5. The high-hardness wastewater recycling treatment equipment according to claim 4, characterized in that, It also includes a spring (13), which acts elastically on the inner cylinder (7) to elastically push the inner cylinder (7) from the large end (34) of the horizontal tube (3) to the small end (33). The two end faces (71) of the inner cylinder (7) can press and seal against the inner circumferential surface of the horizontal tube (3).

6. The high-hardness wastewater recycling treatment equipment according to claim 5, characterized in that, The inner cylinder (7) is fixedly connected to both sides of a linkage shaft (9), which is coaxially arranged with the horizontal tube (3); a rotating frame (91) is fixedly connected to the inner circumference of the horizontal tube (3) for rotating support of the linkage shaft (9).

7. The high-hardness wastewater recycling treatment equipment according to claim 6, characterized in that, The linkage shaft (9) includes a first end (901) and a second end (902), with the first end (901) and the second end (902) of the linkage shaft (9) located on both sides of the inner cylinder (7), respectively; it also includes a rotary driver (11) and a linear driver (12), the rotary driver (11) being connected to the first end (901) of the linkage shaft (9) via a connector one (1101) and used to drive the linkage shaft (9) to rotate axially; the linear driver (12) being connected to the second end (902) of the linkage shaft (9) via a connector two (1201) and used to drive the linkage shaft (9) to move axially.

8. A method for recycling high-hardness wastewater, characterized in that, The processing apparatus described in any one of claims 1-7 is used.

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