Chemical wastewater deep ozone recovery treatment device for pesticide preparation

Abstract

The invention discloses a chemical wastewater deep ozone recovery treatment device for pesticide preparation, and belongs to the technical field of pesticide wastewater treatment. The chemical wastewater deep ozone recovery treatment device for pesticide preparation comprises a reaction tower, an ozone generator and an ozone recovery device, a first-stage rotational flow reaction assembly and a second-stage catalytic reaction assembly are arranged in the reaction tower, and the first-stage rotational flow reaction assembly is arranged on the upper portion of the reaction tower. According to the chemical wastewater deep ozone recovery treatment device for pesticide preparation, the first-stage rotational flow reaction assembly is combined with multiple means such as spiral water distribution, dynamic flow guide and impeller stirring, the mixing degree of ozone and wastewater is remarkably enhanced, the mass transfer efficiency and the oxidation reaction rate are improved, a first-stage rotational flow and second-stage catalysis two-stage treatment process is adopted, and the treatment efficiency is improved. It is ensured that degradation-resistant organic matter in the pesticide wastewater is thoroughly oxidized and decomposed, and the higher removal rate and emission standard are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticide wastewater treatment, in particular to a chemical wastewater deep ozone recovery and treatment device used for pesticide preparation. Background Art

[0002] The wastewater generated during the pesticide production process is characterized by high toxicity, high COD, and high content of difficult-to-degrade organic matter (such as benzene series, organophosphorus, etc.). Traditional biochemical treatment efficiency is low; ozone oxidation technology can effectively degrade difficult-to-degrade organic matter, but existing ozone treatment devices have low ozone utilization rate and direct exhaust ozone emissions causing secondary pollution, and the recycling of ozone exhaust gas has not been achieved.

[0003] Chinese patent publication number CN218146208U discloses a device for deep ozone oxidation treatment of pesticide chemical wastewater, comprising a catalytic oxidation reaction tank, an ozone generator for supplying ozone to the catalytic oxidation reaction tank, a pH adjustment tank for inputting wastewater into the catalytic oxidation reaction tank, an ozone exhaust destructor for treating the exhaust gas from the catalytic oxidation reaction tank, and a drainage tank for receiving the treated wastewater from the catalytic oxidation reaction tank. This invention has a good treatment effect on pollutants and color in pesticide chemical wastewater and can effectively solve the problem of deep treatment of comprehensive wastewater. However, the ozone reactor in this technology is a single structure and lacks a multi-stage coordinated treatment design tailored to the characteristics of pesticide wastewater. Summary of the Invention

[0004] The purpose of the present invention is to provide a deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation. Through a first-stage cyclone reaction component combined with spiral water distribution, dynamic diversion, impeller stirring and other multiple means, the mixing degree of ozone and wastewater is significantly enhanced, the mass transfer efficiency and oxidation reaction rate are improved, and a first-stage cyclone + second-stage catalytic two-stage treatment process is adopted to ensure that the difficult-to-degrade organic matter in the pesticide wastewater is completely oxidized and decomposed, achieving a higher removal rate and emission standards, thereby solving the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: a deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation, comprising a reaction tower, an ozone generator and an ozone recovery device, wherein a first-stage cyclone reaction component and a second-stage catalytic reaction component are arranged inside the reaction tower, wherein the first-stage cyclone reaction component is arranged at the upper position of the reaction tower, and the second-stage catalytic reaction component is arranged at the bottom of the reaction tower, the ozone generator provides ozone to the first-stage cyclone reaction component, and the ozone recovery device recovers the tail gas in the reaction tower.

[0006] Preferably, the first-stage cyclone reaction assembly includes a spiral water distributor, a cyclone strengthening assembly and a first microporous ozone diffuser arranged from top to bottom. The air inlet of the first microporous ozone diffuser is connected to the ozone generator. The first microporous ozone diffuser is a titanium alloy sintered microporous disk with a pore size of 100-150 μm. Microbubble groups are formed when ozone gas passes through. The spiral water distributor is located at the top of the tower and adopts an Archimedean spiral channel design to allow wastewater to enter the tower tangentially to form a cyclone. A water inlet pipe is provided at the upper end of the spiral water distributor, and the water inlet pipe extends to the outside of the reaction tower.

[0007] Preferably, the outer edge of the spiral water distributor is higher than the inner edge, and partitions are provided on the inner and outer edges of the spiral water distributor. The partitions on the outer edge of the spiral water distributor are fixedly connected to the inner wall of the reaction tower through support rods to support the position of the spiral water distributor. No partition is provided on the last circle position of the inner edge of the spiral water distributor. The wastewater flowing out of the spiral water distributor passes through the cyclone enhancement component and comes into countercurrent contact with the ozone.

[0008] Preferably, the swirl intensification component includes a static guide plate, a dynamic guide plate, an impeller and a fixed column. The fixed column is connected to the static guide plate, the dynamic guide plate and the impeller at the same time. A collecting basket is provided at the upper end of the fixed column. The collecting basket is used to collect sediment in the wastewater. Static guide plates are distributed at equal distances on the outer wall of the collecting basket. One end of the static guide plate is fixedly connected to the reaction tower through a first mounting ring. The fixed column is fixed by the collecting basket, the static guide plate and the first mounting ring.

[0009] Preferably, the dynamic guide plates are provided with two groups, and the two groups of dynamic guide plates are staggered and tilted up and down, and a rotating shaft is provided at both ends of the dynamic guide plates. The dynamic guide plates are distributed in a ring with equal distances, and the rotating shaft of the dynamic guide plates close to the center of the circle is movably connected to the fixed column. The dynamic guide plates are placed on the rotating shaft inside the fixed column and are connected to the first bevel gear. The other end of the dynamic guide plates is movably connected to the second mounting ring, and the second mounting ring is fixedly connected to the reaction tower. In order to drive the dynamic guide plates to rotate, a first motor is provided inside the fixed column, and the first motor is fixedly connected to the inner wall of the fixed column through the fixed plate. The output end of the first motor is fixedly connected to the second bevel gear, and the second bevel gear is meshed with the first bevel gear. The first motor drives the second bevel gear to rotate, which drives the first bevel gear to rotate, and then synchronously changes the rotation of the dynamic guide plates, thereby realizing the change of the inclination angle of the dynamic guide plates.

[0010] Preferably, a second motor is provided at the lower end of the fixed column, and the second motor drives the impeller to rotate. The second motor is fixedly connected to the inner wall of the fixed column through a fixed plate. The fixed plate plays a sealing role. The rotation of the impeller causes the air flow to rise, driving the ozone to move upward, and come into countercurrent contact with the downward-flowing wastewater, and cooperate with the guide plate to enhance the mixing effect.

[0011] Preferably, the secondary catalytic reaction component includes a second microporous ozone diffuser and a filler. The second microporous ozone diffuser is placed below the filler. A baffle is provided in the filler to extend the residence time of the wastewater. The filler is filled with a catalyst loaded with a transition metal to promote the decomposition of ozone to produce OH free radicals.

[0012] Preferably, a drain outlet is provided on the reaction tower, and the drain outlet is located above the packing.

[0013] Preferably, a water collection structure is also provided in the reaction tower, and the water collection structure includes a first inclined plate, a second inclined plate and a water guide pipe. The first inclined plate and the second inclined plate are inclined in the same direction and are staggered. The first inclined plate receives the wastewater treated by the first-stage cyclone reaction component and guides it to the second inclined plate. The wastewater forms a water curtain at the end of the first inclined plate, which can react again with the unreacted ozone in the second-stage catalytic reaction component. The second inclined plate and the side wall of the reaction tower form a water collection trough. A water guide pipe is provided at the lower end of the water collection trough. The water guide pipe guides the wastewater to the bottom of the reaction tower to react with the second-stage catalytic reaction component.

[0014] Preferably, a gas collecting hood is provided on the top of the reaction tower, which is connected to the ozone recovery device through a pipeline. The tail gas is collected by the gas collecting hood and enters the ozone recovery device. The ozone recovery device is provided with a condensation separator, a corrosion-resistant membrane separator and an oil-free screw compressor. The gas discharge end of the condensation separator is connected to the corrosion-resistant membrane separator, and the ozone discharge port of the corrosion-resistant membrane separator is connected to the oil-free screw compressor.

[0015] Another technical problem to be solved by the present invention is to provide a method comprising the following steps:

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation proposed in the present invention has a first-stage cyclone reaction component combined with spiral water distribution, dynamic diversion, impeller stirring and other multiple means to significantly enhance the mixing degree of ozone and wastewater, improve the mass transfer efficiency and oxidation reaction rate, and adopt a first-stage cyclone + second-stage catalysis two-stage treatment process to ensure that the difficult-to-degrade organic matter in the pesticide wastewater is completely oxidized and decomposed, achieving a higher removal rate and emission standard; the ozone in the tail gas is condensed, membrane separated and compressed for reuse through the recovery device, reducing ozone consumption, saving operating costs, and reducing the impact of ozone emissions on the environment; the dynamic guide plate and impeller system can automatically adjust the angle and speed according to changes in water quality to achieve intelligent operation and adapt to the treatment requirements under different working conditions. All treatment units are integrated in the reaction tower with a reasonable layout, saving space, and facilitating industrial promotion and application. The system realizes a closed-loop cycle of "wastewater treatment-ozone recovery-ozone regeneration", with high resource utilization, in line with the concept of green chemical industry and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall structural diagram of the deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation of the present invention;

[0019] Figure 2 It is the internal structure diagram of the reaction tower of the present invention;

[0020] Figure 3 This is a cross-sectional view of the spiral water distributor of the present invention;

[0021] Figure 4 is a cross-sectional view of a swirl enhancement assembly of the present invention;

[0022] Figure 5 A top view of the dynamic guide plate of the present invention;

[0023] Figure 6 This is a structural diagram of the water collection structure and secondary catalytic reaction components of the present invention.

[0024] In the figure: 1. reaction tower; 11. drain outlet; 2. primary cyclone reaction assembly; 21. spiral water distributor; 211. partition; 212. support rod; 22. first microporous ozone diffuser; 23. static guide plate; 231. collection basket; 232. first mounting ring; 24. dynamic guide plate; 241. rotating shaft; 242. first bevel gear; 243. second mounting ring; 25. impeller; 251. second motor; 26. fixing column; 261. first motor; 262. second bevel gear; 3. secondary catalytic reaction assembly; 31. second microporous ozone diffuser; 32. packing; 321. baffle; 4. ozone generator; 5. ozone recovery device; 51. condensation separator; 52. corrosion-resistant membrane separator; 53. oil-free screw compressor; 6. water collection structure; 61. first inclined plate; 62. second inclined plate; 63. water guide pipe. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0026] In order to solve the problems of low ozone utilization rate, direct discharge of tail ozone causing secondary pollution, and failure to achieve recycling of ozone tail gas in existing ozone treatment devices, please refer to Figures 1-6 , this embodiment provides the following technical solutions:

[0027] A deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation includes a reaction tower 1, an ozone generator 4 and an ozone recovery device 5. A first-stage cyclone reaction component 2 and a second-stage catalytic reaction component 3 are arranged inside the reaction tower 1, wherein the first-stage cyclone reaction component 2 is arranged at the upper position of the reaction tower 1, and the second-stage catalytic reaction component 3 is arranged at the bottom of the reaction tower 1. The ozone generator 4 provides ozone for the first-stage cyclone reaction component 2. The ozone recovery device 5 is used to recover the tail gas in the reaction tower 1, filter the ozone and supply it to the second-stage catalytic reaction component 3, and at the same time, deliver the filtered oxygen to the ozone generator 4.

[0028] Specifically, the first-stage cyclone reaction component 2 includes a spiral water distributor 21, a cyclone strengthening component and a first microporous ozone diffuser 22 arranged from top to bottom. The air inlet of the first microporous ozone diffuser 22 is connected to the ozone generator 4. The first microporous ozone diffuser 22 is a titanium alloy sintered microporous disk with a pore size of 10 to 50 μm. When the ozone gas passes through, a microbubble group is formed. The spiral water distributor 21 is located at the top of the tower and adopts an Archimedean spiral groove design to allow wastewater to enter the tower tangentially to form a cyclone. The upper end of the spiral water distributor 21 is provided with a water inlet pipe, which extends to the outside of the reaction tower 1. The outer edge of the spiral water distributor 21 is higher than the inner edge, and the inner and outer edges of the spiral water distributor 21 are both provided with Partition 211, the partition 211 on the outer edge of the spiral water distributor 21 is fixedly connected to the inner wall of the reaction tower 1 through the support rod 212 to support the position of the spiral water distributor 21. No partition 211 is set on the last circle of the inner edge of the spiral water distributor 21. When the wastewater flows along the spiral water distributor 21 to the last circle, it can flow out from the inner edge of the spiral water distributor 21 to expand the water distribution area. At the same time, the sediment in the wastewater gathers toward the center of the spiral water distributor 21 and moves to the inner edge of the spiral water distributor 21. The inner edge of the spiral water distributor 21 without the partition 211 is conducive to the falling of the sediment. The wastewater flowing out of the spiral water distributor 21 passes through the cyclone enhancement component and contacts with the ozone countercurrent.

[0029] More specifically, the swirl enhancement component includes a static guide plate 23, a dynamic guide plate 24, an impeller 25 and a fixed column 26. The fixed column 26 is connected to the static guide plate 23, the dynamic guide plate 24 and the impeller 25 at the same time. A collecting basket 231 is provided at the upper end of the fixed column 26. The collecting basket 231 is used to collect sediment in the wastewater. Static guide plates 23 are distributed at equal distances on the outer wall of the collecting basket 231. One end of the static guide plate 23 is fixedly connected to the reaction tower 1 through a first mounting ring 232. The fixing of the fixed column 26 is achieved by the collecting basket 231, the static guide plate 23 and the first mounting ring 232.

[0030] In this embodiment, two groups of dynamic guide plates 24 are provided, and the two groups of dynamic guide plates 24 are staggered and tilted up and down. A rotating shaft 241 is provided at both ends of the dynamic guide plates 24. The dynamic guide plates 24 are distributed in a circular manner with equal distances, and the rotating shaft 241 at one end of the dynamic guide plate 24 close to the center of the circle is movably connected to the fixed column 26. At the same time, the rotating shaft 241 passes through the fixed column 26 and is fixedly connected to the first bevel gear 242 in the fixed column 26. The other end of the dynamic guide plate 24 is movably connected to the second mounting ring 24. 3. The second mounting ring 243 is fixedly connected to the reaction tower 1. In order to drive the dynamic guide plate 24 to rotate, a first motor 261 is provided inside the fixed column 26. The first motor 261 is fixedly connected to the inner wall of the fixed column 26 through the fixed plate. The output end of the first motor 261 is fixedly connected to the second bevel gear 262. The first motor 261 drives the second bevel gear 262 to rotate, thereby driving the first bevel gear 242 to rotate, thereby synchronously changing the rotation of the dynamic guide plate 24 and realizing a change in the inclination angle of the dynamic guide plate 24.

[0031] Furthermore, the impeller 25 is controlled by a second motor 251, and the second motor 251 is fixedly connected to the inner wall of the fixed column 26 through a fixed plate. The fixed plate acts as a seal. The second motor 251 drives the impeller 25 to rotate, causing the air flow to rise, driving the ozone to move upward, and come into countercurrent contact with the downward-flowing wastewater, and cooperate with the guide plate to enhance the mixing effect.

[0032] In addition, a water collection structure 6 is arranged between the secondary catalytic reaction component 3 and the primary cyclone reaction component 2. The water collection structure 6 includes a first inclined plate 61, a second inclined plate 62 and a water guide pipe 63. The first inclined plate 61 and the second inclined plate 62 are inclined in the same direction and are staggered. The first inclined plate 61 receives the wastewater treated by the primary cyclone reaction component 2 and guides it to the second inclined plate 62. The wastewater forms a water curtain at the end of the first inclined plate 61, which can react again with the unreacted ozone in the secondary catalytic reaction component 3. The ozone overflows from the gap between the first inclined plate 61 and the second inclined plate 62, moves upward, and finally moves to the top of the reaction tower 1. The second inclined plate 62 and the side wall of the reaction tower 1 form a water collection trough for collecting wastewater, and a water guide pipe 63 is set at the lower end of the water collection trough. The water guide pipe 63 guides the wastewater to the bottom of the reaction tower 1 to react with the secondary catalytic reaction component 3.

[0033] In this embodiment, the secondary catalytic reaction component 3 includes a second microporous ozone diffuser 31 and a filler 32. The second microporous ozone diffuser 31 is placed below the filler 32. The water conduit 63 guides the wastewater out from below the second microporous ozone diffuser 31. After being treated by the second microporous ozone diffuser 31 and the filler 32, the wastewater can be further degraded. A baffle 321 is provided in the filler 32 to extend the residence time of the wastewater. The filler 32 is filled with a catalyst loaded with transition metals, such as Mn-Ce / Al2O3, to promote the decomposition of ozone to produce OH free radicals. A drain outlet 11 is opened on the reaction tower 1. The drain outlet 11 is located above the filler 32. The wastewater treated by the secondary catalytic reaction component 3 is discharged through the drain outlet 11.

[0034] Correspondingly, a gas collecting hood is provided at the top of the reaction tower 1, and the tail gas is collected through the gas collecting hood and enters the ozone recovery device 5. The ozone recovery device 5 is provided with a condensation separator 51, a corrosion-resistant membrane separator 52 and an oil-free screw compressor 53. The condensation separator 51 removes water and organic matter, and passes oxygen and ozone to the corrosion-resistant membrane separator 52. The corrosion-resistant membrane separator 52 uses a polytetrafluoroethylene-titanium dioxide composite membrane, and the surface of the membrane is coated with an anti-pesticide pollution nano-coating. The polytetrafluoroethylene-titanium dioxide composite membrane separates oxygen and ozone, and transports the oxygen to the ozone generator 4 through a pipeline, and the ozone passing through the polytetrafluoroethylene-titanium dioxide composite membrane is pressurized and supplied to the second microporous ozone diffuser 31 through the oil-free screw compressor 53.

[0035] Working process: Pesticide wastewater enters the reaction tower 1 tangentially through the spiral water distributor 21, and forms a vortex under the action of centrifugal force. At the same time, the sediment gathers toward the center and falls to the collection basket 231 from the place without partition 211. The ozone supplied by the ozone generator 4 forms a group of 10-50μm microbubbles through the first microporous ozone diffuser 22, and contacts with the wastewater in countercurrent. The static guide plate 23 is fixed to guide the flow, and the dynamic guide plate 24 is adjusted by the motor to adjust the inclination angle, which cooperates with the impeller 25 to generate turbulence, thereby enhancing the ozone mass transfer efficiency. The treated wastewater forms a water curtain through the water collection structure 6, contacts the unreacted ozone again, and then flows into the bottom of the reaction tower 1. The wastewater passes through the second microporous ozone diffuser 31 and the filler 32, where the ozone decomposes to produce OH free radicals, completely degrading organic pollutants. The tail gas at the top of the reaction tower 1 passes through the condensation separator 51 to remove water and organic matter. The corrosion-resistant membrane separator 52 enriches the ozone, and the oxygen is recycled to the ozone generator 4. The enriched ozone is pressurized by the oil-free screw compressor 53 and supplied to the secondary catalytic reaction component 3, realizing closed-loop operation.

[0036] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0037] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A chemical wastewater deep ozone recovery and treatment device for pesticide preparation, comprising a reaction tower (1), an ozone generator (4) and an ozone recovery device (5), characterized in that: A first-stage cyclone reaction assembly (2) and a second-stage catalytic reaction assembly (3) are arranged inside the reaction tower (1), wherein the first-stage cyclone reaction assembly (2) is arranged at the upper portion of the reaction tower (1), and the second-stage catalytic reaction assembly (3) is arranged at the bottom of the reaction tower (1); an ozone generator (4) provides ozone for the first-stage cyclone reaction assembly (2), and an ozone recovery device (5) recovers tail gas in the reaction tower (1).

2. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 1 is characterized in that: The primary cyclone reaction assembly (2) comprises a spiral water distributor (21), a cyclone strengthening assembly and a first microporous ozone diffuser (22) arranged from top to bottom, the air inlet of the first microporous ozone diffuser (22) is connected to the ozone generator (4), the spiral water distributor (21) is located at the top of the tower, and a water inlet pipe is provided at the upper end of the spiral water distributor (21), and the water inlet pipe extends to the outside of the reaction tower (1).

3. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 2 is characterized in that: The outer edge of the spiral water distributor (21) is higher than the inner edge, and both the inner and outer edges of the spiral water distributor (21) are provided with partitions (211), but no partition (211) is provided at the last circle position of the inner edge of the spiral water distributor (21).

4. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 2 is characterized in that: The swirl intensification assembly comprises a static guide plate (23), a dynamic guide plate (24), an impeller (25) and a fixed column (26); the fixed column (26) is connected to the static guide plate (23), the dynamic guide plate (24) and the impeller (25) at the same time; a collecting basket (231) is provided at the upper end of the fixed column (26); static guide plates (23) are distributed at equal distances on the outer wall of the collecting basket (231); one end of the static guide plate (23) is fixedly connected to the reaction tower (1) via a first mounting ring (232).

5. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 4 is characterized in that: The dynamic guide plates (24) are provided with two groups. Both ends of the dynamic guide plates (24) are provided with rotating shafts (241). The dynamic guide plates (24) are distributed in a circular manner with equal distances. The rotating shafts (241) at one end of the dynamic guide plates (24) close to the center of the circle are movably connected to the fixed column (26). The rotating shafts (241) of the dynamic guide plates (24) placed inside the fixed column (26) are connected to the first bevel gear (242). The other end of the dynamic guide plates (24) is movably connected to the second mounting ring (243). The second mounting ring (243) is fixedly connected to the reaction tower (1). A first motor (261) is provided inside the fixed column (26). The output end of the first motor (261) is fixedly connected to the second bevel gear (262). The second bevel gear (262) is meshed with the first bevel gear (242).

6. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 5 is characterized in that: A second motor (251) is provided at the lower end of the fixing column (26), and the second motor (251) drives the impeller (25) to rotate.

7. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 1 is characterized in that: The secondary catalytic reaction component (3) comprises a second microporous ozone diffuser (31) and a filler (32). The second microporous ozone diffuser (31) is placed below the filler (32). A baffle (321) is provided in the filler (32). The filler (32) is filled with a catalyst loaded with a transition metal.

8. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 7 is characterized in that: The reaction tower (1) is provided with a drain port (11), and the drain port (11) is located above the filler (32).

9. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 1, characterized in that: A water collecting structure (6) is further provided in the reaction tower (1), and the water collecting structure (6) comprises a first inclined plate (61), a second inclined plate (62) and a water guide pipe (63). The first inclined plate (61) and the second inclined plate (62) are inclined in the same direction and are staggered. The second inclined plate (62) and the side wall of the reaction tower (1) form a water collecting trough, and the water guide pipe (63) is provided at the lower end of the water collecting trough.

10. The deep ozone recovery and treatment device for chemical wastewater used for pesticide preparation according to claim 1, characterized in that: The top of the reaction tower (1) is provided with a gas collecting hood, which is connected to the ozone recovery device (5) through a pipeline. The ozone recovery device (5) is provided with a condensation separator (51), a corrosion-resistant membrane separator (52) and an oil-free screw compressor (53). The gas discharge end of the condensation separator (51) is connected to the corrosion-resistant membrane separator (52), and the ozone discharge port of the corrosion-resistant membrane separator (52) is connected to the oil-free screw compressor (53).

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