A device for integrated treatment of desulfurization wastewater for secondary zinc oxide production

Abstract

The present invention relates to the technical field of secondary zinc oxide production, and specifically to a device for integrated treatment of desulfurization wastewater for secondary zinc oxide production, comprising: a treatment cylinder; an electrolytic oxidation mechanism, wherein the electrolytic oxidation mechanism comprises a rotating cylinder arranged in the treatment cylinder, and an anode and a cathode are relatively fixedly embedded in the inner wall of the rotating cylinder, and the wastewater is electrolyzed through the interaction between the cathode and the anode. The untreated wastewater can be preliminarily filtered by the multi-stage filtering mechanism, and then the impurities generated by the electrolytic oxidation treatment wastewater are filtered again, and then the wastewater is further treated by centrifugal force and ultrafiltration membrane. At the same time, the filter plate after the filter hole is blocked applies pressure when the ultrafiltration membrane filters the wastewater, which can improve the filtration efficiency, reduce membrane pollution, increase the permeability, and enhance the overall performance of the membrane, thereby improving the wastewater treatment effect.

Description

Technical Field

[0001] The invention relates to the technical field of zinc oxide production, and in particular to a device for integrated treatment of desulfurization wastewater used in zinc oxide production. Background Art

[0002] In the production process of zinc oxide, desulfurization is usually carried out to improve product purity, prevent hydrogen sulfide from corroding equipment, protect the environment, and improve production efficiency. Desulfurization can ensure a smooth production process, reduce harmful gas emissions, and extend the service life of equipment. In the desulfurization process, the byproducts generated by the reaction of desulfurization agents with sulfides or sulfur dioxide will dissolve in the water sprayed during the desulfurization process, forming wastewater, which needs to be treated at multiple levels to meet the specifications before it can be discharged.

[0003] In the process of treating desulfurization wastewater with existing technology, it is usually necessary to filter the wastewater multiple times. In particular, when using electrolytic oxidation to treat wastewater, it is necessary to further filter the impurities generated during the electrolytic oxidation treatment. However, the existing filtration method will also produce some smaller impurities when electrolytic oxidation treats wastewater. Since the smaller impurity particles are usually very small in size, it is difficult to effectively remove them using conventional filtration technology. Therefore, they need to be transferred to a special treatment device for treatment, and this treatment process is relatively slow. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an integrated treatment device for desulfurization wastewater used in zinc oxide production, which can effectively solve the problem that the prior art cannot effectively filter out impurities generated when treating wastewater.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a device for integrated treatment of desulfurization wastewater for secondary zinc oxide production, comprising:

[0007] treatment cartridge;

[0008] An electrolytic oxidation mechanism, the electrolytic oxidation mechanism comprising a rotating cylinder arranged in the treatment cylinder, an anode and a cathode being relatively fixedly embedded in the inner wall of the rotating cylinder, and electrolysis of the wastewater is performed through the interaction between the cathode and the anode;

[0009] A multi-stage filtering mechanism, the multi-stage filtering mechanism includes a first motor fixedly connected to the bottom end of the treatment cylinder, the output end of the first motor is fixedly connected to a threaded rod, the threaded rod drives a filter plate, and the filter plate moves up and down during the rotation of the threaded rod, the multi-stage filtering mechanism also includes a cleaning component and a pressurizing component, the cleaning component is arranged in the treatment cylinder, the cleaning component is used to clean impurities filtered out of the filter plate, the pressurizing component is arranged in the filter plate, and the pressurizing component is used to pressurize the wastewater during the final filtration.

[0010] Preferably, the multi-stage filtering mechanism also includes a sliding groove provided on the inner wall of the rotating drum, the inner wall of the sliding groove is slidably connected to a sliding rod, the outer wall of the threaded rod is threadedly connected to a threaded block fixedly connected to the sliding rod, a limiting groove is provided on the outer wall of the threaded rod, the inner wall of the limiting groove is slidably connected to a sliding block, the outer wall of the sliding block is fixedly connected to a connecting disk, the outer wall of the connecting disk is fixedly connected to the filter plate, the connecting disk is rotatably connected to the threaded block, and the connecting disk and the threaded block are connected to a limiting structure so that the distance between the connecting disk and the threaded block does not change.

[0011] Preferably, the cleaning assembly includes a support frame fixedly connected to the top of the treatment cylinder, a second motor is fixedly connected to the top of the support frame, a connecting pipe is fixedly connected to the output end of the second motor, the other end of the connecting pipe rotates through the inner wall of the treatment cylinder and is fixedly connected to the cleaning shell, the inner top wall of the treatment cylinder is rotatably connected to an annular plate, and two symmetrical first electric telescopic rods are fixedly connected between the top of the cleaning shell and the annular plate;

[0012] The inner bottom wall of the cleaning shell is fixedly connected with an exhaust pump, and the exhaust end of the exhaust pump passes through the outer wall of the cleaning shell and is connected with a flexible cleaning cover, the air outlet end of the exhaust pump is fixedly connected with the air inlet of the connecting pipe, and the part of the connecting pipe outside the treatment cylinder is provided with multiple air outlets, and the outer wall of the connecting pipe is rotatably connected with an air guide shell fixedly connected to the support frame, and the air guide shell is communicated with the air outlet, the interior of the air guide shell is connected with an exhaust pipe, and the other end of the exhaust pipe passes through the outer wall of the air guide shell and is fixedly connected with a shunt pipe, and the two ends of the shunt pipe are respectively connected with a gas collection box and a solid collection box, and both ends of the shunt pipe are provided with a first normally closed solenoid valve.

[0013] Preferably, the pressurizing assembly includes a movable groove opened inside the filter plate, the inner wall of the movable groove is rotatably connected with a circular ring, the filter plate has a plurality of filter holes, a baffle for blocking the filter holes in the filter plate is provided in a circumferential array on the inner wall of the circular ring, a movable through hole connected to the movable groove is opened at the top of the filter plate, and a push plate fixedly connected to the circular ring is slidably connected in the movable through hole.

[0014] Preferably, the inner wall of the treatment cylinder is fixedly connected to a support plate, the top of the support plate is fixedly connected to a third motor, the output end of the third motor is fixedly connected to a rotating rod, the outer wall of the rotating rod is fixedly connected to a gear, the outer wall of the rotating cylinder is fixedly connected to an outer gear ring meshing with the gear, the side wall of the rotating cylinder is provided with a plurality of mounting grooves, an ultrafiltration membrane is installed in the mounting groove, an arc-shaped water retaining plate is slidably connected in the mounting groove, and a plurality of second electric telescopic rods are commonly fixedly connected between the side of the plurality of arc-shaped water retaining plates away from the ultrafiltration membrane and the inner wall of the treatment cylinder.

[0015] Preferably, a telescopic groove is provided at the bottom end of the cleaning shell, a passive telescopic rod is fixedly connected to the inner top wall of the cleaning shell, the telescopic part of the passive telescopic rod is slidably connected to the telescopic groove, and a flexible cleaning sponge is fixedly connected to the telescopic end of the passive telescopic rod.

[0016] Preferably, a liquid inlet is provided on the outer wall of the treatment cylinder, and a feed shell is slidably connected to the inner wall of the liquid inlet. When the feed shell is pushed into the treatment cylinder, the water outlet of the feed shell is located above the rotating cylinder.

[0017] Preferably, the bottom end of the treatment cylinder is fixedly connected to a treatment box, and a plurality of drains connected to the treatment box are provided at the inner bottom end of the treatment cylinder and between the treatment cylinder and the rotating cylinder. The interior of the treatment box is connected to a drain pipe, and the other end of the drain pipe extends to the outside of the treatment box. A second normally closed solenoid valve is provided inside the drain pipe.

[0018] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The multi-stage filtration mechanism can be used to initially filter the untreated wastewater, and then the impurities produced by the electrolytic oxidation treatment wastewater can be filtered again. The wastewater is then further treated by centrifugal force and ultrafiltration membrane. At the same time, by blocking the filter holes and applying pressure when the ultrafiltration membrane filters the wastewater, the filtration efficiency can be improved, membrane pollution can be reduced, the permeability can be increased, and the overall performance of the membrane can be enhanced, thereby improving the wastewater treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the cleaning component of the present invention;

[0023] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the cleaning component of the present invention;

[0024] Figure 4 The three-dimensional structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 5 It is a schematic diagram of a partial three-dimensional cross-sectional structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the inner part of the treatment tube of the present invention;

[0027] Figure 7 The three-dimensional structure of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 8 It is a schematic diagram of a partial cross-sectional three-dimensional structure of the filter plate of the present invention.

[0029] Figure numerals: 1, treatment cylinder; 2, multi-stage filtering mechanism; 21, first motor; 22, rotating cylinder; 23, threaded rod; 24, cleaning assembly; 241, support frame; 242, second motor; 243, connecting pipe; 244, cleaning shell; 245, first electric telescopic rod; 246, exhaust pump; 247, flexible cleaning cover; 248, air guide shell; 249, air outlet; 2410, exhaust pipe; 2411, shunt pipe; 2412, gas collection box; 2413, solid collection box; 2414, first normally closed solenoid valve; 2415, annular plate; 25, pressurizing assembly; 251, moving groove; 252, Ring; 253, baffle; 254, movable through hole; 255, push plate; 26, sliding groove; 27, sliding rod; 28, threaded block; 29, limit groove; 210, sliding block; 211, connecting plate; 212, support plate; 213, third motor; 214, rotating rod; 215, gear; 216, outer gear ring; 217, mounting groove; 218, ultrafiltration membrane; 219, arc-shaped water baffle; 2110, second electric telescopic rod; 2111, filter plate; 3, telescopic groove; 4, passive telescopic rod; 5, liquid inlet; 6, feed shell; 7, processing box; 8, drain outlet; 9, drain pipe; 10, second normally closed solenoid valve. DETAILED DESCRIPTION

[0030] 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.

[0031] The present invention will be further described below in conjunction with the embodiments.

[0032] Example: Refer to Figures 1 to 8 , a device for integrated treatment of desulfurization wastewater for secondary zinc oxide production, comprising a treatment cylinder 1, an electrolytic oxidation mechanism and a multi-stage filtering mechanism 2, wherein the impurities in the wastewater can be filtered out first by the multi-stage filtering mechanism 2, and then the wastewater is electrolytically oxidized by the electrolytic oxidation mechanism, and the impurities generated by the electrolytic oxidation are filtered out again by the multi-stage filtering mechanism 2;

[0033] The electrolytic oxidation mechanism includes a rotating cylinder 22 disposed in the treatment cylinder 1, and an anode and a cathode are relatively fixedly embedded in the inner wall of the rotating cylinder 22. The wastewater is electrolyzed through the interaction between the cathode and the anode. During the electrolytic oxidation process, the anode produces strong oxidizing substances such as oxygen, chlorine or ozone through an oxidation reaction, which are used to degrade pollutants in the wastewater; and the cathode produces hydrogen or reducing substances through a reduction reaction, which has a reducing effect on some components in the wastewater.

[0034] In order to perform multi-stage treatment and filtration of wastewater, the following structure is used, referring to Figures 1 to 3 , Figures 5 to 8 , a multi-stage filtering mechanism 2, the multi-stage filtering mechanism 2 includes a first motor 21 fixedly connected to the bottom end of the treatment tube 1, a threaded rod 23 is fixedly connected to the output end of the first motor 21, the threaded rod 23 drives a filter plate 2111, and the filter plate 2111 moves up and down during the rotation of the threaded rod 23, the multi-stage filtering mechanism 2 also includes a cleaning component 24 and a pressurizing component 25, the cleaning component 24 is arranged in the treatment tube 1, the cleaning component 24 is used to clean the impurities filtered out of the filter plate 2111, the pressurizing component 25 is arranged in the filter plate 2111, the pressurizing component 25 is used to pressurize the wastewater during the final filtration, and in the initial state, the filter plate 2111 is at the top of the threaded rod.

[0035] The multi-stage filtering mechanism 2 also includes a sliding groove 26 opened on the inner wall of the rotating cylinder 22, the inner wall of the sliding groove 26 is slidably connected with a sliding rod 27, the outer wall of the threaded rod 23 is threadedly connected with a threaded block 28 fixedly connected to the sliding rod 27, the outer wall of the threaded rod 23 is opened with a limiting groove 29, the inner wall of the limiting groove 29 is slidably connected with a sliding block 210, the outer wall of the sliding block 210 is fixedly connected with a connecting disk 211, the outer wall of the connecting disk 211 is fixedly connected to the filter plate 2111, the connecting disk 211 is rotatably connected to the threaded block 28, and the connecting disk 211 and the threaded block 28 are connected with a limiting structure so that the distance between the connecting disk 211 and the threaded block 28 will not change, wherein the limiting structure is an existing structure that can only make the connecting disk 211 rotate but cannot change the distance between the connecting disk 211 and the threaded block 28.

[0036] In order to clean the filtered impurities, the following structure is set up, refer to Figures 1 to 3 The cleaning assembly 24 includes a support frame 241 fixedly connected to the top of the treatment cylinder 1, a second motor 242 is fixedly connected to the top of the support frame 241, a connecting pipe 243 is fixedly connected to the output end of the second motor 242, the other end of the connecting pipe 243 rotates through the inner wall of the treatment cylinder 1 and is fixedly connected to a cleaning shell 244, an annular plate 2415 is rotatably connected to the inner top wall of the treatment cylinder 1, and two symmetrical first electric telescopic rods 245 are fixedly connected between the top of the cleaning shell 244 and the annular plate 2415;

[0037] The inner bottom wall of the cleaning shell 244 is fixedly connected to an exhaust pump 246, and the exhaust end of the exhaust pump 246 passes through the outer wall of the cleaning shell 244 and is connected to a flexible cleaning cover 247. The outlet end of the exhaust pump 246 is fixedly connected to the air inlet of the connecting pipe 243. The part of the connecting pipe 243 outside the treatment cylinder 1 is provided with multiple air outlets 249. The outer wall of the connecting pipe 243 is rotatably connected to an air guide shell 248 fixedly connected to the support frame 241, and the air guide shell 248 is connected to the air outlet 249. The interior of the air guide shell 248 is connected to an exhaust pipe 2410, and the other end of the exhaust pipe 2410 passes through the outer wall of the air guide shell 248 and is fixedly connected to a diverter pipe 2411. The two ends of the diverter pipe 2411 are respectively connected to a gas collection box 2412 and a solid collection box 2413, and both ends of the diverter pipe 2411 are provided with a first normally closed solenoid valve 2414.

[0038] In order to speed up the treatment of wastewater, the following structure is used for pressurization, refer to Figure 8The pressurizing component 25 includes a movable groove 251 opened inside the filter plate 2111, the inner wall of the movable groove 251 is rotatably connected with a ring 252, the filter plate 2111 has a plurality of filter holes, and a baffle 253 for blocking the filter holes in the filter plate 2111 is arranged in a circumferential array on the inner circumferential wall of the ring 252. A movable through hole 254 connected to the movable groove 251 is opened at the top of the filter plate 2111, and a push plate 255 fixedly connected to the ring 252 is slidably connected in the movable through hole 254.

[0039] Among them, the inner wall of the treatment cylinder 1 is fixedly connected to a support plate 212, the top of the support plate 212 is fixedly connected to a third motor 213, the output end of the third motor 213 is fixedly connected to a rotating rod 214, the outer wall of the rotating rod 214 is fixedly connected to a gear 215, the outer wall of the rotating cylinder 22 is fixedly connected to an outer gear ring 216 meshing with the gear 215, and the side wall of the rotating cylinder 22 is provided with a plurality of mounting grooves 217, an ultrafiltration membrane 218 is installed in the mounting groove 217, and an arc-shaped water retaining plate 219 is slidably connected in the mounting groove 217, and a plurality of second electric telescopic rods 2110 are fixedly connected between the side of the plurality of arc-shaped water retaining plates 219 away from the ultrafiltration membrane 218 and the inner wall of the treatment cylinder 1, and the installation direction of the second electric telescopic rods 2110 is reversible.

[0040] Among them, a telescopic groove 3 is opened at the bottom end of the cleaning shell 244, and a passive telescopic rod 4 is fixedly connected to the inner top wall of the cleaning shell 244. The telescopic part of the passive telescopic rod 4 is slidably connected to the telescopic groove 3, and the telescopic end of the passive telescopic rod 4 is fixedly connected to a flexible cleaning sponge. The passive telescopic rod 4 can only be passively telescopic, so it can drive the passive telescopic rod 4 to telescope during the up and down movement of the filter plate 2111. Therefore, the passive telescopic rod 4 will not block the movement of the filter plate 2111, and the impurities on the filter plate 2111 can be further cleaned through the flexible cleaning sponge at the telescopic end of the passive telescopic rod 4.

[0041] Among them, the outer wall of the treatment cylinder 1 is provided with a liquid inlet 5, and the inner wall of the liquid inlet 5 is slidably connected with a feed shell 6. When the feed shell 6 is pushed into the treatment cylinder 1, the water outlet of the feed shell 6 is above the rotating cylinder 22. In the initial state, the outlet of the feed shell 6 is not above the rotating cylinder 22. Therefore, when the wastewater to be treated needs to be injected, the feed shell needs to be pushed to the top of the rotating cylinder 22.

[0042] Among them, the bottom end of the treatment cylinder 1 is fixedly connected to the treatment box 7, and a plurality of drains 8 connected to the treatment box 7 are opened at the inner bottom end of the treatment cylinder 1 and between the treatment cylinder 1 and the rotating cylinder 22. The interior of the treatment box 7 is connected to a drain pipe 9, and the other end of the drain pipe 9 extends to the outside of the treatment box 7. A second normally closed solenoid valve 10 is arranged inside the drain pipe 9. The wastewater is further treated by the treatment box 7. After the treatment is completed, the second normally closed solenoid valve 10 is opened to discharge the treated water.

[0043] The working principle of the present invention is as follows:

[0044] First, the wastewater to be treated is discharged into the rotating cylinder 22 through the feed shell 6, and the impurities in the wastewater are filtered through the filter plate 2111 at the top of the threaded rod 23. When all the wastewater is discharged into the rotating cylinder 22, the third motor 213 is started, and the first normally closed solenoid valve 2414 leading to the solid collection box 2413 is opened. The cleaning shell 244 is driven to rotate by the third motor 213. When the third motor 213 is started, the exhaust pump 246 is started at the same time. The exhaust pump 246 extracts the impurities filtered out from the filter plate 2111 through the flexible cleaning cover 247, and drives the flexible cleaning cover 247 through the cleaning shell 244 to extract all the impurities on the filter plate 2111, and discharges the impurities into the shunt pipe 2411 through the connecting pipe 243, and then discharges them into the solid collection box 2413;

[0045] Then, the first motor 21 is started, and the threaded rod 23 is driven to rotate by the first motor 21. At the same time, the sliding groove 26 limits the sliding rod 27, so that the threaded block 28 can move on the surface of the threaded rod 23. The threaded block 28 pushes the connecting disk 211, and the limiting groove 29 on the surface of the threaded rod 23 limits the sliding block 210 connected to the connecting disk 211. Therefore, the connecting disk 211 can be driven to rotate by the threaded rod 23, and then the filter plate 2111 can be driven to rotate while moving, until the filter plate 2111 moves to the bottom end of the rotating drum 22 (this moving time is the time for the filter plate 2111 to move to the bottom end of the rotating drum 22 through pre-testing);

[0046] When the filter plate 2111 moves to the bottom end of the rotating drum 22, the first motor 21 is turned off, and then the cathode and the anode are energized to electrolytically oxidize the wastewater. During the electrolytic oxidation treatment, the generated gas can be extracted by the exhaust pump 246. While the anode and the cathode are energized, the first normally closed solenoid valve 2414 leading to the solid collection box 2413 is closed, and the first normally closed solenoid valve 2414 leading to the gas collection box 2412 is opened to allow the gas generated by the electrolytic oxidation to be drawn into the gas collection box 2412. At the same time, due to the continuous rotation of the cleaning shell 244, the passive telescopic rod 4 can be driven to stir the wastewater, so that the treatment of the wastewater electrolytic treatment is more uniform.

[0047] When the electrolytic oxidation is completed, the first motor 21 is driven in reverse to open the first normally closed solenoid valve 2414 leading to the solid collection box 2413, and the first normally closed solenoid valve 2414 leading to the gas collection box 2412 is closed. The third motor 213 needs to be driven in reverse to move the filter plate 2111 upward until it moves to the top of the threaded rod 23, and then all impurities on the filter plate 2111 can be extracted through the flexible cleaning cover 247, and the impurities are discharged into the shunt pipe 2411 through the connecting pipe 243, and then the impurities generated by the electrolytic oxidation are discharged into the solid collection box 2413.

[0048] It should be noted that, since the third motor 213 is driven in the forward direction ( Figure 8 For reference, the driving direction is counterclockwise), so the push plate 255 cannot be moved by the flexible cleaning cover 247. When the third motor 213 is driven in the reverse direction (with Figure 8 For reference, the driving direction is clockwise), so the push plate 255 can be pushed to the other end of the moving through hole 254;

[0049] Therefore, the push plate 255 can be pushed to the other end of the moving through hole 254 by the reverse driving of the third motor 213, and the movement of the push plate 255 drives the ring 252 to rotate in a circle, and further drives the baffle plate 253 to move synchronously, and then the filter hole on the filter plate 2111 can be blocked;

[0050] Then the treated wastewater needs to be further filtered, and the specific process is as follows: first, the second electric telescopic rod 2110 needs to be controlled to drive the arc-shaped water baffle 219 to disengage from the installation groove 217, and then the second motor 242 is started, and the rotating rod 214 is driven to rotate by the second motor 242, and then the gear 215 is driven to rotate. Since the gear 215 is meshed with the outer gear ring 216, the rotating cylinder 22 can be driven to rotate. The centrifugal force generated by the rapid rotation of the rotating cylinder 22 further filters the treated wastewater through the ultrafiltration membrane 218. At the same time, the first motor 21 needs to be started to drive forward, so that the filter plate 2111 moves slowly downward. Since the filter holes of the filter plate 2111 are blocked, pressure can be applied to the wastewater. Applying pressure can improve the filtration efficiency, reduce membrane pollution, increase the transmittance, and enhance the overall performance of the membrane when the ultrafiltration membrane 218 filters the wastewater, thereby improving the wastewater treatment effect. Then the filtered wastewater is thrown between the treatment cylinder 1 and the rotating cylinder 22, and then discharged into the treatment box 7 through the drain port 8.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for integrated treatment of desulfurization wastewater for zinc oxide production, characterized in that: include: Processing cylinder (1); An electrolytic oxidation mechanism, the electrolytic oxidation mechanism comprising a rotating cylinder (22) arranged in a treatment cylinder (1), an anode and a cathode being relatively fixedly embedded in the inner wall of the rotating cylinder (22), and electrolysis of wastewater is performed through interaction between the cathode and the anode; A multi-stage filtering mechanism (2), the multi-stage filtering mechanism (2) comprising a first motor (21) fixedly connected to the bottom end of a treatment barrel (1), a threaded rod (23) fixedly connected to the output end of the first motor (21), the threaded rod (23) driving a filter plate (2111), and the filter plate (2111) moving up and down during the rotation of the threaded rod (23), the multi-stage filtering mechanism (2) further comprising a cleaning component (24) and a pressurizing component (25), the cleaning component (24) being arranged in the treatment barrel (1), the cleaning component (24) being used to clean impurities filtered out of the filter plate (2111), the pressurizing component (25) being arranged in the filter plate (2111), the pressurizing component (25) being used to pressurize the wastewater during the final filtration; The multi-stage filtering mechanism (2) further comprises a sliding groove (26) provided on the inner wall of the rotating cylinder (22); the inner wall of the sliding groove (26) is slidably connected to a sliding rod (27); the outer wall of the threaded rod (23) is threadedly connected to a threaded block (28) fixedly connected to the sliding rod (27); a limiting groove (29) is provided on the outer wall of the threaded rod (23); the inner wall of the limiting groove (29) is slidably connected to a sliding block (210); the outer wall of the sliding block (210) is fixedly connected to a connecting disk (211); the outer wall of the connecting disk (211) is fixedly connected to a filter plate (2111); the connecting disk (211) is rotatably connected to the threaded block (28); and the connecting disk (211) and the threaded block (28) are connected to a limiting structure so that the distance between the connecting disk (211) and the threaded block (28) does not change; The pressurizing component (25) comprises a movable groove (251) provided inside the filter plate (2111); the inner wall of the movable groove (251) is rotatably connected to a circular ring (252); the filter plate (2111) has a plurality of filter holes; a baffle (253) for blocking the filter holes in the filter plate (2111) is provided in a circular array on the inner wall of the circular ring (252); a movable through hole (254) connected to the movable groove (251) is provided at the top end of the filter plate (2111); a push plate (255) fixedly connected to the circular ring (252) is slidably connected inside the movable through hole (254); The inner wall of the treatment cylinder (1) is fixedly connected to a support plate (212), the top of the support plate (212) is fixedly connected to a third motor (213), the output end of the third motor (213) is fixedly connected to a rotating rod (214), the outer wall of the rotating rod (214) is fixedly connected to a gear (215), the outer wall of the rotating cylinder (22) is fixedly connected to an outer gear ring (216) meshing with the gear (215), the side wall of the rotating cylinder (22) is provided with a plurality of mounting grooves (217), an ultrafiltration membrane (218) is mounted in the mounting groove (217), an arc-shaped water retaining plate (219) is slidably connected in the mounting groove (217), and a plurality of second electric telescopic rods (2110) are fixedly connected between the side of the plurality of arc-shaped water retaining plates (219) away from the ultrafiltration membrane (218) and the inner wall of the treatment cylinder (1).

2. The device for integrated treatment of desulfurization wastewater for secondary zinc oxide production according to claim 1, characterized in that: The cleaning assembly (24) comprises a support frame (241) fixedly connected to the top of the treatment cylinder (1); a second motor (242) is fixedly connected to the top of the support frame (241); a connecting pipe (243) is fixedly connected to the output end of the second motor (242); the other end of the connecting pipe (243) rotates through the inner wall of the treatment cylinder (1) and is fixedly connected to a cleaning shell (244); an annular plate (2415) is rotatably connected to the inner top wall of the treatment cylinder (1); and two symmetrical first electric telescopic rods (245) are fixedly connected between the top of the cleaning shell (244) and the annular plate (2415); The inner bottom wall of the cleaning shell (244) is fixedly connected to an exhaust pump (246); the exhaust end of the exhaust pump (246) passes through the outer wall of the cleaning shell (244) and is connected to a flexible cleaning cover (247); the air outlet end of the exhaust pump (246) is fixedly connected to the air inlet of the connecting pipe (243); a portion of the connecting pipe (243) outside the treatment cylinder (1) is provided with a plurality of air outlets (249); the outer wall of the connecting pipe (243) is rotatably connected to an air guide fixedly connected to the support frame (241) The air guide shell (248) is connected to an air outlet (249); the interior of the air guide shell (248) is connected to an exhaust pipe (2410); the other end of the exhaust pipe (2410) passes through the outer wall of the air guide shell (248) and is fixedly connected to a shunt pipe (2411); the two ends of the shunt pipe (2411) are respectively connected to a gas collection box (2412) and a solid collection box (2413); and the two ends of the shunt pipe (2411) are both provided with a first normally closed solenoid valve (2414).

3. The device for integrated treatment of desulfurization wastewater for secondary zinc oxide production according to claim 2, characterized in that: A telescopic groove (3) is provided at the bottom end of the cleaning shell (244); a passive telescopic rod (4) is fixedly connected to the inner top wall of the cleaning shell (244); a telescopic portion of the passive telescopic rod (4) is slidably connected to the telescopic groove (3); and a flexible cleaning sponge is fixedly connected to the telescopic end of the passive telescopic rod (4).

4. The device for integrated treatment of desulfurization wastewater for secondary zinc oxide production according to claim 1, characterized in that: The outer wall of the treatment cylinder (1) is provided with a liquid inlet (5), and the inner wall of the liquid inlet (5) is slidably connected with a feed shell (6); when the feed shell (6) is pushed into the treatment cylinder (1), the water outlet of the feed shell (6) is located above the rotating cylinder (22).

5. The device for integrated treatment of desulfurization wastewater for secondary zinc oxide production according to claim 1, characterized in that: The bottom end of the treatment cylinder (1) is fixedly connected to a treatment box (7); a plurality of drain ports (8) connected to the treatment box (7) are provided at the inner bottom end of the treatment cylinder (1) and between the treatment cylinder (1) and the rotating cylinder (22); the interior of the treatment box (7) is connected to a drainage pipe (9); the other end of the drainage pipe (9) extends to the outside of the treatment box (7); a second normally closed solenoid valve (10) is provided inside the drainage pipe (9).

Images