A device and process for advanced treatment and recycling of toxic chemical wastewater

Abstract

The application relates to a kind of toxic chemical wastewater advanced treatment recycling device and process in the technical field of chemical wastewater treatment, comprising a treatment tank, the side top of the treatment tank is connected with liquid inlet pipe for passing wastewater into the inside of treatment tank, the top of the treatment tank is provided with oxidant tank containing oxidant.The application installs multiple filter screens for filtering water on the outer wall of vertical pipe, so that the wastewater flowing into the inside of vertical pipe can filter out the oxidation product therein via filter screen, the liquid moves to the top of water baffle and is finally discharged through liquid discharge pipe, and the oxidation product filtered by filter screen falls into the inside of mud containing cavity under the action of its own gravity, realizing solid-liquid separation, and the rotating column can drive the rotation of mud containing cavity, so that the oxidation product in mud containing cavity can be poured into the bottom end of treatment tank, thereby realizing the extraction of oxidation product without shutdown, ensuring the treatment efficiency of the application for wastewater.

Description

Technical Field

[0001] This invention relates to the field of chemical wastewater treatment technology, and in particular to a device and process for the deep treatment and recycling of toxic chemical wastewater. Background Technology

[0002] Chemical plants are major water consumers with low water reuse rates and large amounts of wastewater discharged externally, wasting water resources and causing environmental pollution. Currently, water scarcity is threatening the production of these large industrial water users. To achieve sustainable development, reduce resource waste, lower production and operating costs, and improve economic efficiency, enterprises need to deeply treat chemical wastewater for reuse as supplementary water in the industrial water supply system, thus achieving sustainable development and resource recycling. Chemical wastewater contains a large number of impurities and toxic substances. For example, oily wastewater from ethylene, polyethylene, rubber, polyester, methanol, and ethylene glycol production plants, after treatment, can meet the national secondary discharge standards. However, due to water scarcity, this water needs further deep treatment to meet industrial supplementary water requirements and be reused.

[0003] Commonly used methods for advanced treatment of chemical wastewater include membrane separation, electrocatalytic decomposition, ozone decomposition, and iron-carbon micro-electrolysis. Among these, electrocatalytic decomposition effectively treats toxic substances in water. At room temperature, a catalytic electrode reaction occurs, forming hydroxyl radicals and gradually converting organic matter in the water into biodegradable organic matter. Some of the organic matter may even combust, converting into carbon dioxide and water, which are usable resources. Electrocatalytic decomposition is simple to operate and has high wastewater treatment efficiency, making it the most widely used method in actual production. However, this method requires the use of existing technology, such as that disclosed in CN115286076A, and necessitates the addition of an oxidant. The oxidant is used to oxidize and decompose toxic substances in the wastewater to achieve the treatment effect. However, the oxidation products generated by this oxidation process can easily cause equipment blockage. Therefore, existing technologies frequently require shutdowns to clean the filtered products. However, excessively frequent shutdowns can significantly impact wastewater treatment efficiency. Summary of the Invention

[0004] To address the problem mentioned in the background section regarding the impact on wastewater treatment efficiency caused by the need for shutdown to treat oxidation products in existing wastewater treatment methods, this invention provides the following technical solution:

[0005] A device for deep treatment and recycling of toxic chemical wastewater includes a treatment tank. The top of one side of the treatment tank is connected to an inlet pipe for introducing wastewater into the treatment tank. The top of the treatment tank is provided with an oxidant tank containing an oxidant. The bottom of the oxidant tank is provided with an oxidant adding component for quantitatively measuring the oxidant and adding it into the treatment tank. The oxidant adding component is located between the treatment tank and the oxidant tank.

[0006] The treatment tank is equipped with a conical water guide plate that restricts the direction of water flow. The bottom of the conical water guide plate is equipped with an oxidation treatment component for electrocatalytic wastewater. The bottom of the oxidation treatment component is equipped with a filter component for filtering the wastewater after electrocatalytic treatment.

[0007] The filtration assembly includes a conical hood installed below the oxidation treatment assembly. The conical hood is fixed inside the treatment tank. A vertical pipe is fixed to the outlet at the bottom of the conical hood. Multiple filter screens for filtering wastewater are fixed on the outer wall of the vertical pipe. A baffle plate is fixed to the outer end of the vertical pipe. The bottom end of the vertical pipe passes through the baffle plate and extends to the bottom of the baffle plate. A drain pipe is fixedly connected to the bottom of one side of the treatment tank. The drain pipe is located at the top of the baffle plate. The wastewater after electrolysis flows into the vertical pipe through the conical hood. The liquid passes through the filter screen, flows to the top of the baffle plate, and is discharged through the drain pipe. The oxidation products are trapped inside the vertical pipe by the filter screen to achieve solid-liquid separation.

[0008] The bottom end of the vertical pipe is provided with a rotating column, and the rotating column has multiple mud-collecting cavities that are connected to the inside of the vertical pipe. The oxidation products inside the vertical pipe fall into the mud-collecting cavities under their own weight. A rotating shaft is fixed in the middle of the rotating column, and the rotating shaft drives the rotating column to rotate to pour the oxidation products inside the mud-collecting cavities into the bottom of the treatment tank.

[0009] Furthermore, the two ends of the rotating shaft are movably connected to the front and rear sides of the processing tank respectively via bearings, the front end of the rotating shaft passes through the processing tank and extends out of the front side of the processing tank, and an electric motor for driving the rotating shaft to rotate is fixed at the front end of the rotating shaft;

[0010] A ring groove is formed on the outer wall of the rotating column, and a sealing ring is fixed at the bottom end of the vertical tube, with the sealing ring in contact with the inner wall of the ring groove.

[0011] The bottom of the treatment tank is movably connected to a sludge discharge door that can be opened. After the sludge discharge door is opened, the oxidation products are discharged from the bottom opening of the treatment tank.

[0012] Furthermore, the oxidant addition assembly includes a circular protective box fixed to the bottom of the oxidant tank. Inside the circular protective box is a rotatable hollow turntable. A U-shaped feeding trough is fixed at the top of the hollow turntable. The opening at the top of the U-shaped feeding trough is connected to the opening at the bottom of the oxidant tank, allowing the oxidant in the oxidant tank to fall into the U-shaped feeding trough. A feeding pipe is fixedly connected to the bottom of the circular protective box. The bottom of the feeding pipe is connected to the inside of the processing tank. The oxidant falling into the U-shaped feeding trough moves into the processing tank through the feeding pipe after the hollow turntable rotates.

[0013] Furthermore, the hollow turntable is provided with a drive mechanism in the middle to drive the hollow turntable to rotate. The drive mechanism passes through the hollow turntable and the circular protective box and extends to the front of the processing tank.

[0014] The drive mechanism includes a rotating shaft, the rear end of which passes through a circular protective box and is fixed to a hollow turntable. A driven shaft is movably connected to the top of the inside of the treatment tank via a bearing. A water wheel is fixed to the outer end of the driven shaft, and the water wheel is located below the outlet of the inlet pipe. The driven shaft and the rotating shaft are driven by a gear transmission assembly and a belt transmission assembly.

[0015] Furthermore, the oxidation treatment assembly includes an oxidation tank located below a conical water guide plate. A hollow rod is fixed to the central cavity of the oxidation tank via a bracket. A spring is fixed inside the hollow rod, and a movable rod is fixed to the top of the spring. A hemispherical water-blocking cap is fixed to the top of the movable rod extending from inside the hollow rod. Multiple equally spaced horizontal bars are fixed to the outer wall of the bottom end of the hemispherical water-blocking cap. An electrode is fixed to the bottom end of the horizontal bars. A rubber rod is fixed to the bottom end of the movable rod, and a rubber plug is fixed to the outer side of the top end of the rubber rod. Multiple equally spaced through holes are opened at the bottom of the oxidation tank, and the rubber plug is adapted to the through holes.

[0016] Furthermore, each electrode is provided with a sludge scraper ring at its outer end. The sludge scraper ring contacts the outer wall of the electrode, and the end of the sludge scraper ring away from the electrode is fixed to the inner wall of the treatment tank.

[0017] Furthermore, a plurality of equally spaced support legs are fixed to the bottom of the outer wall of the processing tank, and the bottom ends of the support legs are in contact with the ground;

[0018] A ladder is fixed to the rear of the treatment tank for people to climb and add oxidant into the oxidant tank.

[0019] The present invention also includes a process for deep treatment and recycling of toxic chemical wastewater using the above-mentioned apparatus, comprising the following steps:

[0020] Step 1: Add sufficient oxidant to the oxidant tank in advance. The oxidant in the oxidant tank will move along the inclined surface at the bottom of the oxidant tank into the U-shaped feeding trough.

[0021] Step 2: The wastewater is introduced into the treatment tank through the inlet pipe. The wastewater flows out through the outlet of the inlet pipe and impacts the water wheel to start rotating. The rotating water wheel drives the rotating shaft to rotate through the driven shaft, belt drive assembly and gear drive assembly. Finally, the rotating shaft drives the hollow turntable to rotate the U-shaped material receiving trough. When the U-shaped material receiving trough rotates 180 degrees and connects with the discharge pipe, the oxidant in the U-shaped material receiving trough will move into the treatment tank through the discharge pipe and come into contact with the wastewater.

[0022] Step 3: The wastewater continues to flow downwards and passes through the conical guide plate. Under the restriction of the opening at the bottom of the conical guide plate, it flows towards the hemispherical baffle cap. Under the impact of the water flow, the hemispherical baffle cap is pressed, which drives the moving rod, crossbar, electrode, rubber rod and rubber plug to move downwards until the rubber plug is inserted into the through hole. At this time, the hemispherical baffle cap covers the outside of the opening in the middle of the oxidation tank, thus sealing the opening. Then the wastewater will gather inside the oxidation tank and come into full contact with the electrode and oxidant to achieve electrocatalytic treatment of the wastewater.

[0023] Step 4: During the gap in wastewater flow, the top of the hemispherical baffle cap loses pressure, and the spring will push the hemispherical baffle cap to move the rubber rod and electrode upward, pulling the rubber plug out of the through hole. The wastewater after electrocatalytic treatment will flow downward through the through hole. At the same time as the electrode moves upward, the sludge scraper ring contacts the outer wall of the electrode and can scrape off the oxidation products adhering to the outer wall of the electrode, so that the oxidation products can flow downward with the water flow.

[0024] Step 5: After electrocatalytic treatment, the wastewater will flow into the vertical pipe along the inclined surface of the conical cover. Then the liquid will flow through the filter screen to the top of the baffle plate and then be discharged through the drain pipe.

[0025] The oxidation products trapped by the filter fall into the bottom of the vertical pipe and move into the sludge chamber to achieve solid-liquid separation. At the same time, the drive motor drives the rotating shaft and rotating column to rotate. The rotating column can also pour the oxidation products in the sludge chamber into the bottom of the treatment tank. The oxidation products can be removed by opening the sludge discharge door.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. By installing multiple filter screens on the outer wall of the vertical pipe, the wastewater flowing into the vertical pipe can be filtered to remove the oxidation products. The liquid passes through the filter screen, moves to the top of the baffle plate, and is finally discharged through the drain pipe. The oxidation products filtered by the filter screen fall into the sludge chamber under its own gravity, achieving solid-liquid separation. Moreover, the rotating column can drive the sludge chamber to rotate, so that the oxidation products in the sludge chamber can be poured into the bottom of the treatment tank. This allows the oxidation products to be removed without stopping the machine, ensuring the wastewater treatment efficiency of this invention.

[0028] 2. The water flow entering the treatment tank through the inlet pipe drives the water wheel to rotate, which in turn drives the hollow turntable to rotate inside the circular protective box. The U-shaped feeding trough inside the hollow turntable is connected to the bottom of the oxidant tank, so the oxidant in the oxidant tank will automatically fall into the U-shaped feeding trough, realizing quantitative oxidant measurement. Then, the circular protective box drives the U-shaped feeding trough to rotate and put the measured oxidant into the treatment tank, realizing automatic oxidant addition and eliminating the tedious operation of manual addition.

[0029] 3. By utilizing the wastewater flowing into the treatment tank to press down on the hemispherical baffle cap, rubber rod, and rubber plug, the rubber plug can block the through hole at the bottom of the oxidation tank, temporarily trapping the wastewater inside the oxidation tank and extending the contact time between the electrode and the wastewater. This ensures the electrocatalytic treatment effect of the wastewater. Moreover, the hemispherical baffle cap can also move upward during the intermittent pulse water flow to pull the rubber plug out of the through hole, allowing the treated wastewater to flow smoothly downward through the through hole for filtration. The ingenious structural design eliminates the trouble of manual control. Attached Figure Description

[0030] Figure 1 This is a front view of the present invention;

[0031] Figure 2 This is a rear view of the present invention;

[0032] Figure 3 This is a cross-sectional view of the processing tank of the present invention;

[0033] Figure 4 For the present invention Figure 3 Enlarged view of A in the middle;

[0034] Figure 5 For the present invention Figure 3 Enlarged view of B in the middle;

[0035] Figure 6 For the present invention Figure 3 Enlarged view of C;

[0036] Figure 7 This is a schematic diagram of the structure of the oxidation treatment component and the filtration component of the present invention;

[0037] Figure 8 For the present invention Figure 7 A magnified view of D.

[0038] The following is a list of component names represented by the various reference numerals in the attached figures:

[0039] 1. Processing tank; 2. Inlet pipe; 3. Drain pipe; 4. Oxidant tank;

[0040] 5. Oxidant addition assembly; 51. Circular protective box; 52. Hollow turntable; 53. U-shaped material chute; 54. Feed pipe; 55. Drive mechanism; 551. Rotating shaft; 552. Gear transmission assembly; 553. Belt transmission assembly; 554. Driven shaft; 555. Water wheel;

[0041] 6. Oxidation treatment components; 61. Oxidation tank; 62. Hollow rod; 63. Spring; 64. Moving rod; 65. Hemispherical water baffle; 66. Crossbar; 67. Electrode; 68. Rubber rod; 69. Rubber plug; 610. Through hole; 611. Sludge scraper ring;

[0042] 7. Conical water guide plate;

[0043] 8. Filter assembly; 81. Conical hood; 82. Vertical pipe; 83. Filter screen; 84. Water baffle; 85. Rotating column; 86. Mud collection chamber; 87. Sealing ring; 88. Rotating shaft; 89. Electric motor; 810. Mud discharge gate;

[0044] 9. Supporting leg;

[0045] 10. Climbing ladders. Detailed Implementation

[0046] The preferred embodiments of the present invention are described in detail below, and a clear and complete description is provided in conjunction with the accompanying drawings.

[0047] Please see Figure 1-8 This invention provides a device for the deep treatment and recycling of toxic chemical wastewater, including a treatment tank 1. Multiple equally spaced support legs 9 are fixed to the bottom of the outer wall of the treatment tank 1, with the bottom of each support leg 9 contacting the ground. An inlet pipe 2 is connected to the top of one side of the treatment tank 1 for introducing wastewater into the tank. An oxidant tank 4 containing an oxidant is located at the top of the treatment tank 1. A ladder 10 for climbing is fixed to the rear of the treatment tank 1 for adding oxidant to the oxidant tank 4. An oxidant adding component 5 for quantitatively measuring and adding oxidant into the treatment tank 1 is located at the bottom of the oxidant tank 4, between the treatment tank 1 and the oxidant tank 4.

[0048] Specifically, such as Figure 4 and 7As shown, the oxidant addition component 5 includes a circular protective box 51 fixed to the bottom of the oxidant tank 4. The circular protective box 51 has a rotatable hollow turntable 52 inside. A U-shaped feeding trough 53 is fixed at the top inside the hollow turntable 52. The opening at the top of the U-shaped feeding trough 53 is connected to the opening at the bottom of the oxidant tank 4, so that the oxidant in the oxidant tank 4 can fall into the U-shaped feeding trough 53. A feeding pipe 54 is fixedly connected to the bottom of the circular protective box 51. The bottom end of the feeding pipe 54 is connected to the inside of the processing tank 1. The oxidant falling into the U-shaped feeding trough 53 moves into the processing tank 1 through the feeding pipe 54 after the hollow turntable 52 rotates.

[0049] Furthermore, in order to drive the hollow turntable 52 to rotate, a drive mechanism 55 is provided in the middle of the hollow turntable 52 to drive the hollow turntable 52 to rotate. The drive mechanism 55 passes through the hollow turntable 52 and the circular protective box 51 and extends to the front side of the treatment tank 1. Specifically, the drive mechanism 55 includes a rotating shaft 551. The rear end of the rotating shaft 551 passes through the circular protective box 51 and is fixed to the hollow turntable 52. The top of the inside of the treatment tank 1 is movably connected to a driven shaft 554 through a bearing. A water wheel 555 is fixed to the outer end of the driven shaft 554. The water wheel 555 is located below the outlet of the liquid inlet pipe 2. The driven shaft 554 and the rotating shaft 551 are driven by a gear transmission assembly 552 and a belt transmission assembly 553.

[0050] After the wastewater to be treated enters the treatment tank 1 through the inlet pipe 2, it will be discharged through the outlet of the inlet pipe 2. The wastewater flowing into the inlet pipe 2 is a pulsed water flow, that is, it will flow into the inlet pipe 2 in segments. The wastewater flowing out of the inlet pipe 2 impacts the water wheel 555 and starts to rotate. The rotating water wheel 555 drives the rotating shaft 551 to rotate through the driven shaft 554, the belt drive assembly 553 and the gear drive assembly 552. Finally, the rotating shaft 551 drives the hollow turntable 52 to drive the U-shaped material receiving trough 53 to rotate. When the U-shaped material receiving trough 53 rotates 180 degrees and connects with the discharge pipe 54, the oxidant in the U-shaped material receiving trough 53 will move into the treatment tank 1 through the discharge pipe 54 and come into contact with the wastewater. This invention can automatically complete the addition of oxidant by using the flow potential energy of water flow, reducing the operational difficulty of treating toxic chemical wastewater.

[0051] Inside the treatment tank 1, a conical water guide plate 7 is fixed to restrict the direction of water flow. At the bottom of the conical water guide plate 7 is an oxidation treatment component 6 for electrocatalytic wastewater, specifically, as shown... Figure 5 and 8As shown, the oxidation treatment component 6 includes an oxidation tank 61 located below a conical water guide plate 7. A hollow rod 62 is fixed to the hollow cavity of the oxidation tank 61 by a bracket. A spring 63 is fixed inside the hollow rod 62. A movable rod 64 is fixed to the top of the spring 63. A hemispherical water-blocking cap 65 is fixed to the top of the movable rod 64 extending from inside the hollow rod 62. A plurality of equally spaced horizontal bars 66 are fixed to the outer wall of the bottom end of the hemispherical water-blocking cap 65. An electrode 67 is fixed to the bottom end of the horizontal bars 66. A rubber rod 68 is fixed to the bottom end of the movable rod 64. A rubber plug 69 is fixed to the outer side of the top end of the rubber rod 68. A plurality of equally spaced through holes 610 are opened at the bottom of the oxidation tank 61. The rubber plug 69 is adapted to the through holes 610.

[0052] As the wastewater continues to flow downwards, it passes through the conical guide plate 7. Under the restriction of the opening at the bottom of the conical guide plate 7, it flows towards the hemispherical baffle cap 65. Under the impact of the water flow, the hemispherical baffle cap 65 is pressed, which drives the moving rod 64, the crossbar 66, the electrode 67, the rubber rod 68, and the rubber plug 69 to move downwards until the rubber plug 69 is inserted into the through hole 610. At this time, the hemispherical baffle cap 65 covers the outside of the opening in the middle of the oxidation tank 61, thus sealing the opening. Then, the wastewater will gather inside the oxidation tank 61 and come into full contact with the electrode 67 and the oxidant, thus achieving electrocatalytic treatment of the wastewater.

[0053] It is known that the wastewater flowing into the inlet pipe 2 is a pulsed flow, that is, it flows into the treatment tank 1 intermittently in segments. Therefore, when the wastewater in the inlet pipe 2 impacts the top of the hemispherical baffle cap 65, it will apply a downward pressure to the hemispherical baffle cap 65 from above. When it is in the gap of water flow, the top of the hemispherical baffle cap 65 loses pressure. At this time, the spring 63 will push the hemispherical baffle cap 65 to move the rubber rod 68 and the electrode 67 upward, and pull the rubber plug 69 out of the through hole 610. The wastewater after electrocatalytic treatment will flow downward through the through hole 610.

[0054] Furthermore, a sludge scraping ring 611 is provided at the outer end of each electrode 67. The sludge scraping ring 611 contacts the outer wall of the electrode 67, and the end of the sludge scraping ring 611 away from the electrode 67 is fixed to the inner wall of the treatment tank 1. This allows the sludge scraping ring 611 to contact the outer wall of the electrode 67 as the electrode 67 moves upward, thereby scraping off the oxidation products adhering to the outer wall of the electrode 67, so that the oxidation products can flow downward with the water flow.

[0055] At the bottom of the oxidation treatment component 6 is a filter component 8 for filtering the wastewater after electrocatalytic treatment, specifically, as follows: Figure 6 and 7As shown, the filtration assembly 8 includes a conical shroud 81 installed below the oxidation treatment assembly 6. The conical shroud 81 is fixed inside the treatment tank 1. A vertical pipe 82 is fixed to the water outlet at the bottom of the conical shroud 81. Multiple filter screens 83 for filtering wastewater are fixed on the outer wall of the vertical pipe 82. A baffle plate 84 is fixed to the outer end of the vertical pipe 82. The bottom end of the vertical pipe 82 passes through the baffle plate 84 and extends to the bottom of the baffle plate 84. A drain pipe 3 is fixedly connected to the bottom of one side of the treatment tank 1. The drain pipe 3 is located at the top of the baffle plate 84. The wastewater after electrolysis flows into the interior of the vertical pipe 82 through the conical shroud 81. The liquid passes through the filter screens 83 and flows to the top of the baffle plate 84 before being discharged through the drain pipe 3. The oxidation products are trapped inside the vertical pipe 82 by the filter screens 83 to achieve solid-liquid separation.

[0056] Furthermore, a rotating column 85 is provided at the bottom end of the vertical pipe 82. An annular groove is formed on the outer wall of the rotating column 85. A sealing ring 87 is fixed at the bottom end of the vertical pipe 82. The sealing ring 87 contacts the inner wall of the annular groove, which helps to enhance the sealing of the contact surface when the bottom end of the vertical pipe 82 contacts the side wall of the rotating column 85, preventing liquid from flowing out through the bottom end of the vertical pipe 82. Multiple mud-collecting cavities 86 are formed on the rotating column 85 and are connected to the inside of the vertical pipe 82. The oxidation products inside the vertical pipe 82 fall into the mud-collecting cavities 86 under its own weight. A rotating shaft 88 is fixed in the middle of the rotating column 85. The two ends of the rotating shaft 88 are movably connected to the front and rear sides of the treatment tank 1 through bearings, respectively. The front end of the rotating shaft 88 passes through the treatment tank 1 and extends out of the front side of the treatment tank 1. A motor 89 for driving the rotating shaft 88 to rotate is fixed at the front end of the rotating shaft 88.

[0057] After electrocatalytic treatment, the wastewater flows along the inclined surface of the conical cover 81 into the interior of the vertical pipe 82. The liquid then flows through the filter screen 83 to the top of the baffle plate 84 and is discharged through the drain pipe 3. The oxidation products trapped by the filter screen 83 fall into the bottom of the interior of the vertical pipe 82 and move into the mud chamber 86, achieving solid-liquid separation. At the same time, the drive motor 89 drives the rotating shaft 88 and the rotating column 85 to rotate. The rotating column 85 can also pour the oxidation products in the mud chamber 86 into the bottom of the processing tank 1. The operator can open the mud discharge door 810 to remove the oxidation products without stopping the machine, which helps to ensure that the processing efficiency of the invention is not affected.

[0058] Based on the above description and accompanying drawings, those skilled in the art can understand and implement this invention. Furthermore, any non-creative modifications made to this invention by those skilled in the art without inventive effort are still within the scope of protection of this invention.

Claims

1. A device for deep treatment and recycling of toxic chemical wastewater, comprising a treatment tank (1), wherein the top of one side of the treatment tank (1) is connected to an inlet pipe (2) for introducing wastewater into the treatment tank (1), characterized in that: The top of the treatment tank (1) is provided with an oxidant tank (4) containing oxidant, and the bottom of the oxidant tank (4) is provided with an oxidant addition component (5) for quantitatively measuring the oxidant and adding it into the treatment tank (1). The oxidant addition component (5) is located between the treatment tank (1) and the oxidant tank (4). The treatment tank (1) has a conical water guide plate (7) fixed inside to restrict the direction of water flow. The bottom of the conical water guide plate (7) is provided with an oxidation treatment component (6) for electrocatalytic wastewater. The bottom of the oxidation treatment component (6) is provided with a filter component (8) for filtering the wastewater after electrocatalytic treatment. The filter assembly (8) includes a conical hood (81) installed below the oxidation treatment assembly (6). The conical hood (81) is fixed inside the treatment tank (1). A vertical pipe (82) is fixed at the water outlet at the bottom of the conical hood (81). Multiple filter screens (83) for filtering wastewater are fixed on the outer wall of the vertical pipe (82). A baffle plate (84) is fixed at the outer end of the vertical pipe (82). The bottom end of the vertical pipe (82) passes through the baffle plate (84) and extends to the bottom of the baffle plate (84). A drain pipe (3) is fixedly connected to the bottom of one side of the treatment tank (1). The drain pipe (3) is located at the top of the baffle plate (84). The wastewater after electrolysis flows into the interior of the vertical pipe (82) through the conical hood (81). The liquid passes through the filter screen (83) and flows to the top of the baffle plate (84) and is discharged through the drain pipe (3). The oxidation products are trapped inside the vertical pipe (82) by the filter screen (83) to achieve solid-liquid separation. The bottom end of the vertical pipe (82) is provided with a rotating column (85), and the rotating column (85) has multiple mud-collecting cavities (86) that are connected to the inside of the vertical pipe (82). The oxidation products inside the vertical pipe (82) fall into the mud-collecting cavity (86) under its own weight. The rotating column (85) has a rotating shaft (88) fixed in the middle. The rotating shaft (88) drives the rotating column (85) to rotate to pour the oxidation products inside the mud-collecting cavity (86) into the bottom end of the treatment tank (1). The oxidation treatment component (6) includes an oxidation tank (61) located below a conical water guide plate (7). A hollow rod (62) is fixed to the middle cavity of the oxidation tank (61) by a bracket. A spring (63) is fixed inside the hollow rod (62). A movable rod (64) is fixed to the top of the spring (63). The top of the movable rod (64) extends from inside the hollow rod (62) and is fixed to a hemispherical water baffle cap (65). Multiple equally spaced horizontal bars (66) are fixed to the outer wall of the bottom end of the hemispherical water baffle cap (65). The bottom of the horizontal bars (66) An electrode (67) is fixed at one end. A rubber rod (68) is fixed at the bottom end of the moving rod (64). A rubber plug (69) is fixed at the top of the rubber rod (68). A plurality of equally spaced through holes (610) are opened at the bottom of the oxidation tank (61). The rubber plug (69) is adapted to the through holes (610). Each electrode (67) is provided with a sludge scraper (611) at its outer end. The sludge scraper (611) is in contact with the outer wall of the electrode (67). The end of the sludge scraper (611) away from the electrode (67) is fixed to the inner wall of the treatment tank (1).

2. The device for deep treatment and recycling of toxic chemical wastewater according to claim 1, characterized in that: The two ends of the rotating shaft (88) are movably connected to the front and rear sides of the processing tank (1) through bearings, the front end of the rotating shaft (88) passes through the processing tank (1) and extends out of the front side of the processing tank (1), and the front end of the rotating shaft (88) is fixed with an electric motor (89) that drives the rotating shaft (88) to rotate. The outer wall of the rotating column (85) has an annular groove, and the bottom end of the vertical tube (82) is fixed with a sealing ring (87), which is in contact with the inner wall of the annular groove. The bottom of the treatment tank (1) is movably connected to a sludge discharge door (810) that can be opened. After the sludge discharge door (810) is opened, the oxidation products are discharged from the bottom opening of the treatment tank (1).

3. The device for deep treatment and recycling of toxic chemical wastewater according to claim 1, characterized in that: The oxidant addition component (5) includes a circular protective box (51) fixed to the bottom of the oxidant tank (4). The circular protective box (51) has a rotatable hollow turntable (52) inside. A U-shaped feeding trough (53) is fixed at the top inside the hollow turntable (52). The opening at the top of the U-shaped feeding trough (53) is connected to the opening at the bottom of the oxidant tank (4) for the oxidant in the oxidant tank (4) to fall into the U-shaped feeding trough (53). A feeding pipe (54) is fixedly connected to the bottom of the circular protective box (51). The bottom of the feeding pipe (54) is connected to the inside of the processing tank (1). The oxidant falling into the U-shaped feeding trough (53) moves into the processing tank (1) through the feeding pipe (54) after the hollow turntable (52) rotates.

4. The device for deep treatment and recycling of toxic chemical wastewater according to claim 3, characterized in that: The hollow turntable (52) is provided with a drive mechanism (55) in the middle to drive the hollow turntable (52) to rotate. The drive mechanism (55) passes through the hollow turntable (52) and the circular protective box (51) and extends to the front side of the processing tank (1). The drive mechanism (55) includes a rotating shaft (551), the rear end of which passes through a circular protective box (51) and is fixed to a hollow turntable (52). The top of the inside of the treatment tank (1) is movably connected to a driven shaft (554) via a bearing. A water wheel (555) is fixed to the outer end of the driven shaft (554). The water wheel (555) is located below the outlet of the inlet pipe (2). The driven shaft (554) and the rotating shaft (551) are driven by a gear transmission assembly (552) and a belt transmission assembly (553).

5. The device for deep treatment and recycling of toxic chemical wastewater according to claim 1, characterized in that: The bottom of the outer wall of the processing tank (1) is fixed with a plurality of equally spaced support legs (9), and the bottom of the support legs (9) is in contact with the ground. The processing tank (1) is fixed with a ladder (10) for people to climb, which is used to add oxidant into the oxidant tank (4).

6. A process for deep treatment of toxic chemical wastewater using the toxic chemical wastewater deep treatment and recycling device according to any one of claims 1-5, characterized in that: Includes the following steps: Step 1: Add oxidant to the oxidant tank (4) in advance. The oxidant in the oxidant tank (4) will move along the slope at the bottom of the oxidant tank (4) into the U-shaped feeding trough (53). Step 2: The wastewater is introduced into the treatment tank (1) through the inlet pipe (2). The wastewater flows out through the outlet of the inlet pipe (2) and impacts the water wheel (555) to make the water wheel (555) start to rotate. The rotating water wheel (555) drives the rotating shaft (551) to rotate through the driven shaft (554), belt drive assembly (553) and gear drive assembly (552). Finally, the rotating shaft (551) drives the hollow turntable (52) to drive the U-shaped material trough (53) to rotate. When the U-shaped material trough (53) rotates 180 degrees and connects with the discharge pipe (54), the oxidant in the U-shaped material trough (53) will move into the treatment tank (1) through the discharge pipe (54) and come into contact with the wastewater. Step 3: The wastewater continues to flow downwards and passes through the conical guide plate (7). Under the restriction of the opening at the bottom of the conical guide plate (7), it flows to the hemispherical baffle cap (65). Under the impact of the water flow, the hemispherical baffle cap (65) is pressed, which drives the moving rod (64), the crossbar (66), the electrode (67), the rubber rod (68), and the rubber plug (69) to move downwards until the rubber plug (69) is inserted into the through hole (610). At this time, the hemispherical baffle cap (65) covers the outside of the opening in the middle of the oxidation tank (61), thus sealing the opening. Then the wastewater will gather inside the oxidation tank (61) and come into full contact with the electrode (67) and the oxidant, thus realizing the electrocatalytic treatment of the wastewater. Step 4: During the gap in the flow of wastewater, the top of the hemispherical baffle cap (65) loses pressure, and the spring (63) will push the hemispherical baffle cap (65) to move the rubber rod (68) and the electrode (67) upward, pulling the rubber plug (69) out of the through hole (610). The wastewater after electrocatalytic treatment will flow downward through the through hole (610). At the same time as the electrode (67) moves upward, the sludge scraper ring (611) contacts the outer wall of the electrode (67) and can scrape off the oxidation products adhering to the outer wall of the electrode (67), so that the oxidation products can flow downward with the water flow. Step 5: After electrocatalytic treatment, the wastewater will flow along the inclined surface of the conical cover (81) into the interior of the vertical pipe (82), and then the liquid will flow through the filter screen (83) to the top of the baffle plate (84), and then be discharged through the drain pipe (3); The oxidation products trapped by the filter screen (83) will fall into the bottom of the vertical pipe (82) and move into the mud chamber (86) to achieve solid-liquid separation. At the same time, the driving motor (89) drives the rotating shaft (88) and the rotating column (85) to rotate. The rotating column (85) can also pour the oxidation products in the mud chamber (86) into the bottom of the treatment tank (1). The oxidation products can be taken out by opening the mud discharge door (810).

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