Photocatalytic reaction device for multi-stage reverse osmosis strong brine degradation treatment

Abstract

The invention belongs to the technical field of photocatalytic reaction devices, and particularly relates to a photocatalytic reaction device for multi-stage reverse osmosis strong brine degradation treatment, which comprises a graded degradation tank and a photocatalytic reaction assembly, a blocking filter screen, a first degradation plate, a second degradation plate and a third degradation plate are arranged in the graded degradation tank; the graded degradation tank performs graded degradation on the strong brine in the water inlet pipe by utilizing a barrier filter screen, a first degradation plate, a second degradation plate and a third degradation plate in the graded degradation tank, and after a three-way valve is switched, the three-way valve is communicated with the water inlet pipe, and the strong brine sequentially passes through a plurality of groups of multi-stage reverse osmosis multi-stage filter elements in the flowing process in the water inlet pipe, so that the strong brine in the water inlet pipe is degraded. The strong brine is subjected to multi-stage reverse osmosis, so that the strong brine enters the photocatalytic reaction assembly through the water outlet pipe after being subjected to multi-stage reverse osmosis and degradation, and the time of the photocatalytic reaction of the strong brine is shortened under the action of the photocatalytic reaction of the treated strong brine.

Description

Technical Field

[0001] The invention belongs to the technical field of photocatalytic reaction devices, and in particular relates to a photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment. Background Art

[0002] Multi-stage reverse osmosis brine refers to the high-concentration waste liquid remaining after biochemical treatment, microfiltration, nanofiltration, ultrafiltration and reverse osmosis treatment in the sewage treatment process. It is characterized by high salt content and high organic matter content, and most of the organic matter is stable organic matter that cannot be oxidized and decomposed by biochemical reactions.

[0003] After searching, in the prior art, Chinese patent publication number CN206980693U, authorization announcement date: 2018-02-09, discloses a highly efficient liquid core fiber photocatalytic reactor, including: ultraviolet light source, light transmission fiber, ultraviolet light emitting surface, liquid core fiber bundle and reactor shell, wherein the liquid core fiber bundle is composed of multiple liquid core fibers, each of which is coated with a titanium dioxide catalyst on its inner wall, and the liquid core fiber bundle is fixed to the inside of the reactor shell by a liquid core fiber upper positioning frame and a liquid core fiber lower positioning frame. The benefit of this application is that the liquid core fiber integrates the three functions of catalyst carrier, ultraviolet light transmission medium and catalytic oxidation micro-reaction channel, so the reactor of this application achieves the efficiency of efficiently degrading COD in multi-stage reverse osmosis concentrated brine by using the principle of photocatalytic oxidation.

[0004] However, the equipment still has the following defects: although it can achieve the efficiency of efficiently degrading COD in multi-stage reverse osmosis concentrated brine, during the photocatalytic reaction of concentrated brine, only ultraviolet light can enter the liquid core optical fiber and be transmitted inside the liquid core optical fiber through total reflection. The range of illumination is fixed and blind spots are prone to occur, which affects the process flow of the photocatalytic reaction and increases the duration of the process. Summary of the invention

[0005] In view of the above problems, the present invention provides a photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment, comprising a graded degradation tank and a photocatalytic reaction component; a barrier filter, a first degradation plate, a second degradation plate and a third degradation plate are arranged in the graded degradation tank, the photocatalytic reaction component is located on one side of the graded degradation tank and close to the third degradation plate, a three-way valve is arranged on one side of the graded degradation tank and close to the barrier filter, a recovery pipe is connected between one end of the three-way valve and the photocatalytic reaction component, a water inlet pipe is connected between the other end of the three-way valve and the graded degradation tank, a plurality of groups of multi-stage reverse osmosis multi-stage filter elements are arranged at the bottom of the water inlet pipe, and a water outlet pipe is also connected between one side of the photocatalytic reaction component and the graded degradation tank;

[0006] During the flow of concentrated brine in the water inlet pipe, it passes through several groups of multi-stage reverse osmosis multi-stage filter elements in sequence, and performs multi-stage reverse osmosis on the concentrated brine. After multi-stage reverse osmosis and degradation, the concentrated brine enters the photocatalytic reaction component through the water outlet pipe, and is used for the photocatalytic reaction of the concentrated brine after treatment.

[0007] Furthermore, the photocatalytic reaction assembly includes a recovery tube and a reaction tube; the outer wall of the recovery tube is respectively provided with a first through hole, a second through hole and a third through hole, the reaction tube is clamped inside the recovery tube, and a gap is reserved at the connection between the recovery tube and the reaction tube.

[0008] Furthermore, a fourth through hole is opened on one side outer wall of the reaction cylinder, and the fourth through hole and the second through hole are distributed at both ends of the water outlet pipe. A reaction mechanism is arranged inside the reaction cylinder, and a four-way valve is arranged at the bottom of the reaction cylinder.

[0009] Furthermore, one side of the four-way valve is interconnected with the recovery pipe, and the recovery pipe passes through the third through hole. A tap water pipe is provided on the other side of the four-way valve, and the tap water pipe passes through the first through hole. The end of the tap water pipe extends to the outside of the recovery cylinder, and a booster pump is provided on the tap water pipe.

[0010] Furthermore, the reaction mechanism includes a limit cover plate; the limit cover plate is rotatably connected to a limit pin at the center of the central axis, a multi-sided hole is provided at the bottom of the limit pin, a rotating ring is provided on the inner wall of the limit cover plate, and two groups of micro motors are rotatably connected to the rotating ring, and the output ends of the two groups of micro motors are transmission-connected with screw rods.

[0011] Furthermore, two groups of linkage blocks are threadedly connected on the screw rod, and one end of the two groups of linkage blocks are slidably fitted and connected to the bottom of the limit cover plate, the top of the limit cover plate is fixedly connected to a servo motor, and the output end of the servo motor is transmission-connected to the top of the limit pin, and the bottom of the two groups of linkage blocks are provided with a linkage part, and a cleaning part is connected through the center of the central axis of the linkage part, the bottom end of the cleaning part is rotatably connected to the top of the four-way valve, and the top of the cleaning part is movably engaged in the multi-faceted hole.

[0012] Furthermore, the linkage part includes a spiral stirring rod; a spiral lamp tube is arranged on the inner wall of the spiral stirring rod, a linkage arm is arranged inside the spiral lamp tube, and a reserved hole is opened at the center of the central axis of the linkage arm.

[0013] Furthermore, fastening rings are provided at both ends of the linkage arm, and two groups of the fastening rings are fixedly connected to the outside of the spiral stirring rod and the spiral lamp tube.

[0014] Furthermore, the outer wall of the linkage arm is also provided with two groups of guide adjustment grooves, and the two groups of guide adjustment grooves are symmetrically arranged with the central axis of the reserved hole as the center, and strip light tubes are slidably connected in the two groups of guide adjustment grooves, and the top ends of the two groups of strip light tubes are fixedly connected to the bottom of the linkage block.

[0015] Furthermore, the cleaning part includes a cleaning tube; the bottom end of the cleaning tube is rotatably connected to the top of the four-way valve, a plurality of overflow holes are provided on the outer wall of the cleaning tube, an electric push rod is fixedly connected to the top of the cleaning tube, and the output end of the electric push rod is transmission-connected to a polygonal column, and the polygonal column is movably clamped in the polygonal hole.

[0016] The beneficial effects of the present invention are:

[0017] 1. The concentrated brine in the water inlet pipe is graded and degraded by utilizing the internal baffle filter, the first degradation plate, the second degradation plate and the third degradation plate through the graded degradation pool, and after switching the three-way valve, the three-way valve and the water inlet pipe are interconnected. During the flow of the concentrated brine in the water inlet pipe, it passes through several groups of multi-stage reverse osmosis multi-stage filter elements in sequence to perform multi-stage reverse osmosis on the concentrated brine, so that the concentrated brine enters the photocatalytic reaction component through the outlet pipe after multi-stage reverse osmosis and degradation, and is used for the photocatalytic reaction of the concentrated brine after treatment, thereby shortening the photocatalytic reaction time of the concentrated brine.

[0018] 2. Through the continuous operation of the spiral lamp tube and the strip lamp tube, the concentrated brine entering the reaction tube undergoes a photocatalytic reaction, and the rotation of the output end of the micromotor drives the two groups of strip lamp tubes to move to different positions in the guide adjustment groove, so as to reduce the blind area of ​​the photocatalytic reaction of the concentrated brine in the reaction tube and improve the range of the photocatalytic reaction.

[0019] 3. The spiral lamp tube and the spiral stirring rod have the same spiral radial direction, so the concentrated brine can be stirred during the photocatalytic reaction of the concentrated brine by the spiral stirring rod, making the photocatalytic reaction of the concentrated brine more uniform.

[0020] 4. Tap water is injected into the cleaning pipe in the form of high pressure and overflows outward through several groups of overflow holes in different directions. The output end of the servo motor continuously drives the linkage part to rotate, so that the high-pressure tap water in the overflow hole flushes the linkage part during the rotation process, removes the concentrated salt water on the surface of the linkage part, reduces the corrosion of the linkage part, and prolongs the service life of the linkage part.

[0021] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a photocatalytic reaction device according to an embodiment of the present invention is shown;

[0024] Figure 2 The structure of the photocatalytic reaction component of the embodiment of the present invention is shown Figure 1 ;

[0025] Figure 3 The structure of the photocatalytic reaction component of the embodiment of the present invention is shown Figure 2 ;

[0026] Figure 4 A schematic diagram showing the connection between the reaction cylinder and the four-way valve according to an embodiment of the present invention is shown;

[0027] Figure 5 A schematic diagram of the structure of the reaction mechanism of an embodiment of the present invention is shown;

[0028] Figure 6 The structure of the limit cover plate of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 7 The structure of the limit cover plate of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 8 A schematic diagram of the structure of the linkage part of an embodiment of the present invention is shown;

[0031] Fig. 9 A schematic diagram of the structure of a linkage arm according to an embodiment of the present invention is shown;

[0032] Fig.10 A schematic structural diagram of a cleaning unit according to an embodiment of the present invention is shown.

[0033] In the figure: 1. graded degradation tank; 2. barrier filter; 3. first degradation plate; 4. second degradation plate; 5. third degradation plate; 6. photocatalytic reaction component; 61. recovery cylinder; 62. first through hole; 63. second through hole; 64. reaction cylinder; 65. third through hole; 66. fourth through hole; 67. four-way valve; 68. reaction mechanism; 681. limit cover plate; 682. linkage part; 6821. spiral stirring rod; 6822. spiral lamp tube; 6823. linkage arm; 6824. reserved hole; 6825. Fastening ring; 6826, guide adjustment groove; 6827, strip light tube; 683, cleaning part; 6831, cleaning tube; 6832, overflow hole; 6833, electric push rod; 6834, polygonal column; 684, limit pin; 685, polygonal hole; 686, swivel; 687, micro motor; 688, screw rod; 689, linkage block; 6810, servo motor; 69, tap water pipe; 7, recovery pipe; 8, water inlet pipe; 9, multi-stage reverse osmosis multi-stage filter element; 10, three-way valve; 11, water outlet pipe. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The embodiment of the present invention provides a photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment, including a graded degradation tank 1 and a photocatalytic reaction component 6; illustratively, as Figure 1 shown.

[0036] The graded degradation pool 1 is provided with a baffle filter 2, a first degradation plate 3, a second degradation plate 4 and a third degradation plate 5. The photocatalytic reaction component 6 is located on one side of the graded degradation pool 1 and close to the third degradation plate 5. A three-way valve 10 is provided on one side of the graded degradation pool 1 and close to the baffle filter 2. A recovery pipe 7 is connected between one end of the three-way valve 10 and the photocatalytic reaction component 6. A water inlet pipe 8 is connected between the other end of the three-way valve 10 and the graded degradation pool 1. Several groups of multi-stage reverse osmosis multi-stage filter elements 9 are provided at the bottom of the water inlet pipe 8. A water outlet pipe 11 is also connected between one side of the photocatalytic reaction component 6 and the graded degradation pool 1.

[0037] Specifically, the graded degradation pool 1 utilizes the internal barrier filter 2, the first degradation plate 3, the second degradation plate 4 and the third degradation plate 5 to grade and degrade the concentrated brine in the water inlet pipe 8, and after switching the three-way valve 10, the three-way valve 10 is connected to the water inlet pipe 8. During the flow of the concentrated brine in the water inlet pipe 8, it passes through several groups of multi-stage reverse osmosis multi-stage filter elements 9 in sequence to perform multi-stage reverse osmosis on the concentrated brine, so that the concentrated brine enters the photocatalytic reaction component 6 through the outlet pipe 11 after multi-stage reverse osmosis and degradation, and is used for the photocatalytic reaction of the concentrated brine after treatment.

[0038] The photocatalytic reaction assembly 6 includes a recovery cylinder 61 and a reaction cylinder 64; illustratively, Figure 2 , Figure 3 and Figure 4 shown.

[0039] The outer side wall of the recovery cylinder 61 is respectively provided with a first through hole 62, a second through hole 63 and a third through hole 65, the reaction cylinder 64 is clamped in the interior of the recovery cylinder 61, and a gap is reserved at the connection between the recovery cylinder 61 and the reaction cylinder 64, a fourth through hole 66 is provided on one side of the outer wall of the reaction cylinder 64, the fourth through hole 66 and the second through hole 63 are distributed at both ends of the water outlet pipe 11, a reaction mechanism 68 is arranged inside the reaction cylinder 64, a four-way valve 67 is arranged at the bottom of the reaction cylinder 64, one side of the four-way valve 67 is communicated with the recovery pipe 7, and the recovery pipe 7 passes through the third through hole 65,

[0040] A tap water pipe 69 is disposed on the other side of the four-way valve 67 , and the tap water pipe 69 passes through the first through hole 62 . The end of the tap water pipe 69 extends to the outside of the recovery cylinder 61 , and a booster pump is disposed on the tap water pipe 69 .

[0041] Specifically, the water outlet pipe 11 guides the concentrated brine after multi-stage reverse osmosis degradation through the fourth through hole 66 to the reaction cylinder 64, and the reaction mechanism 68 is used to perform a photocatalytic reaction on the concentrated brine in the reaction cylinder 64. By opening the four-way valve 67, the concentrated brine precipitated at the bottom of the reaction cylinder 64 is refluxed to the water inlet pipe 8 through the recovery pipe 7, and is used for the multi-stage reverse osmosis degradation of the concentrated brine. By opening the four-way valve 67, the tap water pipe 69 and the reaction cylinder 64 are interconnected. When the tap water pipe 69 is continuously injected with tap water, it is used in conjunction with the booster pump to rinse and clean the inner wall of the reaction cylinder 64 and the reaction mechanism 68.

[0042] The reaction mechanism 68 includes a limiting cover plate 681; illustratively, as Figure 5 , Figure 6 and Figure 7 shown.

[0043] The limiting cover plate 681 is rotatably connected to a limiting pin 684 at the center of the central axis, and a multi-faceted hole 685 is provided at the bottom of the limiting pin 684. A rotating ring 686 is provided on the inner wall of the limiting cover plate 681, and two groups of micro motors 687 are rotatably connected to the rotating ring 686. The output ends of the two groups of micro motors 687 are transmission-connected to a screw rod 688, and two groups of linkage blocks 689 are threadedly connected to the screw rod 688, and one end of the two groups of linkage blocks 689 are slidably fitted and connected to the limiting cover plate 681. The bottom of the positioning cover plate 681, the top of the limiting cover plate 681 is fixedly connected with a servo motor 6810, and the output end of the servo motor 6810 is transmission-connected with the top of the limiting pin 684, the bottoms of the two groups of linkage blocks 689 are each provided with a linkage part 682, the center of the central axis of the linkage part 682 is penetrated by a cleaning part 683, the bottom end of the cleaning part 683 is rotatably connected to the top of the four-way valve 67, and the top end of the cleaning part 683 is movably engaged in the multi-faceted hole 685.

[0044] The linkage part 682 includes a spiral stirring rod 6821; illustratively, as Figure 8 and Fig. 9 shown.

[0045] The inner wall of the spiral stirring rod 6821 is provided with a spiral lamp tube 6822, and a linkage arm 6823 is provided inside the spiral lamp tube 6822, and a reserved hole 6824 is provided at the center of the central axis of the linkage arm 6823, and fastening rings 6825 are provided at both ends of the linkage arm 6823, and two groups of the fastening rings 6825 are fixedly connected to the outside of the spiral stirring rod 6821 and the spiral lamp tube 6822, and the outer wall of the linkage arm 6823 is also provided with two groups of guide adjustment grooves 6826, and the two groups of the guide adjustment grooves 6826 are symmetrically arranged with the central axis of the reserved hole 6824 as the center, and the two groups of the guide adjustment grooves 6826 are slidably connected with strip lamp tubes 6827, and the top ends of the two groups of the strip lamp tubes 6827 are fixedly connected to the bottom of the linkage block 689.

[0046] The cleaning unit 683 includes a cleaning tube 6831; illustratively, Fig.10 shown.

[0047] The bottom end of the cleaning tube 6831 is rotatably connected to the top of the four-way valve 67, and a plurality of overflow holes 6832 are provided on the outer wall of the cleaning tube 6831. An electric push rod 6833 is fixedly connected to the top of the cleaning tube 6831, and the output end of the electric push rod 6833 is transmission-connected to a polygonal column 6834, and the polygonal column 6834 is movably engaged in the polygonal hole 685.

[0048] Specifically, the spiral lamp tube 6822 and the strip lamp tube 6827 work continuously to perform a photocatalytic reaction on the concentrated brine entering the reaction tube 64, and the rotation of the output end of the micro motor 687 drives the two groups of strip lamp tubes 6827 to move to different positions in the guide adjustment groove 6826, so as to reduce the blind area of ​​the photocatalytic reaction of the concentrated brine in the reaction tube 64, thereby improving the range of the photocatalytic reaction. The spiral lamp tube 6822 has the same spiral radial direction as the spiral stirring rod 6821, and can stir the concentrated brine during the photocatalytic reaction of the spiral stirring rod 6821, so that the photocatalytic reaction of the concentrated brine is more uniform.

[0049] The output end of the electric push rod 6833 drives the polygonal column 6834 to fall and separate it from the polygonal hole 685. In the process of injecting tap water into the water pipe 69, the booster pump is used to inject tap water into the cleaning tube 6831 in the form of high pressure and overflow outward through several groups of overflow holes 6832 in different directions. The output end of the servo motor 6810 continuously drives the linkage part 682 to rotate, so that the high-pressure tap water in the overflow hole 6832 flushes the linkage part 682 during the rotation process, removes the concentrated brine on the surface of the linkage part 682, reduces corrosion to the linkage part 682, and improves the service life of the linkage part 682.

[0050] The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment proposed in the embodiment of the present invention has the following working principle:

[0051] The concentrated brine in the water inlet pipe 8 is subjected to graded degradation by using the internal barrier filter 2, the first degradation plate 3, the second degradation plate 4 and the third degradation plate 5 in the graded degradation pool 1, and after switching the three-way valve 10, the three-way valve 10 is connected with the water inlet pipe 8. During the flow of the concentrated brine in the water inlet pipe 8, the concentrated brine passes through a plurality of groups of multi-stage reverse osmosis multi-stage filter elements 9 in sequence, and the concentrated brine is subjected to multi-stage reverse osmosis, so that the concentrated brine enters the photocatalytic reaction assembly 6 through the outlet pipe 11 after multi-stage reverse osmosis and degradation;

[0052] The concentrated brine after multi-stage reverse osmosis degradation is directed to the reaction cylinder 64 through the fourth through hole 66 through the outlet pipe 11, and the concentrated brine in the reaction cylinder 64 is photocatalytically reacted by the reaction mechanism 68. The concentrated brine precipitated at the bottom of the reaction cylinder 64 is refluxed to the water inlet pipe 8 through the recovery pipe 7 by opening the four-way valve 67, so as to be used for multi-stage reverse osmosis degradation of the concentrated brine again. The tap water pipe 69 is connected to the reaction cylinder 64 by opening the four-way valve 67. When the tap water is continuously injected into the tap water pipe 69, the booster pump is used to rinse and clean the inner wall of the reaction cylinder 64 and the reaction mechanism 68.

[0053] The concentrated brine entering the reaction tube 64 is subjected to a photocatalytic reaction by the continuous operation of the spiral lamp tube 6822 and the strip lamp tube 6827, and the rotation of the output end of the micro motor 687 drives the two groups of strip lamp tubes 6827 to move to different positions in the guide adjustment groove 6826, so as to reduce the blind area of ​​the photocatalytic reaction of the concentrated brine in the reaction tube 64, thereby increasing the range of the photocatalytic reaction. The spiral lamp tube 6822 has the same spiral radial direction as the spiral stirring rod 6821, and can stir the concentrated brine during the photocatalytic reaction of the spiral stirring rod 6821, so that the photocatalytic reaction of the concentrated brine is more uniform.

[0054] The output end of the electric push rod 6833 drives the polygonal column 6834 to fall and separate from the polygonal hole 685. In the process of injecting tap water into the water pipe 69, the booster pump is used to inject tap water into the cleaning tube 6831 in the form of high pressure and overflow outward through several groups of overflow holes 6832 in different directions. The output end of the servo motor 6810 continuously drives the linkage part 682 to rotate, so that the high-pressure tap water in the overflow hole 6832 flushes the linkage part 682 during the rotating process, removes the concentrated brine on the surface of the linkage part 682, reduces corrosion to the linkage part 682, and increases the service life of the linkage part 682.

[0055] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment, characterized in that: The invention comprises a graded degradation tank (1) and a photocatalytic reaction component (6); the graded degradation tank (1) is provided with a barrier filter (2), a first degradation plate (3), a second degradation plate (4) and a third degradation plate (5); the photocatalytic reaction component (6) is located on one side of the graded degradation tank (1) and close to the third degradation plate (5); a three-way valve (10) is provided on one side of the graded degradation tank (1) and close to the barrier filter (2); a recovery pipe (7) is connected between one end of the three-way valve (10) and the photocatalytic reaction component (6); a water inlet pipe (8) is connected between the other end of the three-way valve (10) and the graded degradation tank (1); a plurality of groups of multi-stage reverse osmosis multi-stage filter elements (9) are provided at the bottom of the water inlet pipe (8); and a water outlet pipe (11) is also connected between one side of the photocatalytic reaction component (6) and the graded degradation tank (1); During the flow of concentrated brine in the water inlet pipe, it passes through several groups of multi-stage reverse osmosis multi-stage filter elements in sequence, and performs multi-stage reverse osmosis on the concentrated brine. After multi-stage reverse osmosis and degradation, the concentrated brine enters the photocatalytic reaction component through the water outlet pipe for photocatalytic reaction of the treated concentrated brine.

2. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 1 is characterized by: The photocatalytic reaction assembly (6) comprises a recovery cylinder (61) and a reaction cylinder (64); the outer wall of the recovery cylinder (61) is respectively provided with a first through hole (62), a second through hole (63) and a third through hole (65); the reaction cylinder (64) is snap-fitted into the interior of the recovery cylinder (61), and a gap is reserved at the connection between the recovery cylinder (61) and the reaction cylinder (64).

3. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 2 is characterized by: A fourth through hole (66) is provided on an outer wall of one side of the reaction cylinder (64); the fourth through hole (66) and the second through hole (63) are located at both ends of the water outlet pipe (11); a reaction mechanism (68) is provided inside the reaction cylinder (64); and a four-way valve (67) is provided at the bottom of the reaction cylinder (64).

4. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 3 is characterized by: One side of the four-way valve (67) is in communication with the recovery pipe (7), and the recovery pipe (7) passes through the third through hole (65). A tap water pipe (69) is provided on the other side of the four-way valve (67), and the tap water pipe (69) passes through the first through hole (62). The end of the tap water pipe (69) extends to the outside of the recovery cylinder (61), and a booster pump is provided on the tap water pipe (69).

5. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 3 is characterized by: The reaction mechanism (68) comprises a limit cover plate (681); a limit pin (684) is rotatably connected at the center of the central axis of the limit cover plate (681); a multi-faceted hole (685) is provided at the bottom of the limit pin (684); a rotating ring (686) is provided on the inner wall of the limit cover plate (681); and two groups of micro motors (687) are rotatably connected to the rotating ring (686); and the output ends of the two groups of micro motors (687) are transmission-connected to screw rods (688).

6. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 5, characterized in that: Two groups of linkage blocks (689) are threadedly connected to the screw rod (688), and one end of the two groups of linkage blocks (689) are slidably connected to the bottom of the limit cover plate (681), the top of the limit cover plate (681) is fixedly connected to a servo motor (6810), and the output end of the servo motor (6810) is transmission-connected to the top of the limit pin (684), and the bottom of the two groups of linkage blocks (689) are provided with a linkage part (682), and the center of the central axis of the linkage part (682) is connected to a cleaning part (683), the bottom end of the cleaning part (683) is rotatably connected to the top of the four-way valve (67), and the top end of the cleaning part (683) is movably engaged in the multi-faceted hole (685).

7. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 6, characterized in that: The linkage part (682) comprises a spiral stirring rod (6821); a spiral lamp tube (6822) is arranged on the inner wall of the spiral stirring rod (6821); a linkage arm (6823) is arranged inside the spiral lamp tube (6822); and a reserved hole (6824) is opened at the center of the central axis of the linkage arm (6823).

8. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 7, characterized in that: Both ends of the linkage arm (6823) are provided with fastening rings (6825), and two sets of the fastening rings (6825) are fixedly connected to the outside of the spiral stirring rod (6821) and the spiral lamp tube (6822).

9. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 8, characterized in that: The outer wall of the linkage arm (6823) is further provided with two groups of guide adjustment grooves (6826), and the two groups of guide adjustment grooves (6826) are symmetrically arranged with the central axis of the reserved hole (6824) as the center, and strip light tubes (6827) are slidably connected in the two groups of guide adjustment grooves (6826), and the top ends of the two groups of strip light tubes (6827) are fixedly connected to the bottom of the linkage block (689).

10. The photocatalytic reaction device for multi-stage reverse osmosis concentrated brine degradation treatment according to claim 6, characterized in that: The cleaning portion (683) comprises a cleaning tube (6831); the bottom end of the cleaning tube (6831) is rotatably connected to the top of the four-way valve (67); the outer wall of the cleaning tube (6831) is provided with a plurality of overflow holes (6832); the top of the cleaning tube (6831) is fixedly connected to an electric push rod (6833); the output end of the electric push rod (6833) is transmission-connected to a multi-prism (6834); and the multi-prism (6834) is movably engaged in the multi-prism hole (685).

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