Ozone catalytic oxidation sewage treatment device

Abstract

The utility model provides a kind of ozone catalytic oxidation sewage treatment device, it is related to sewage treatment field.The sewage treatment device includes: sewage treatment device main body, including vertical reaction tower, first catalyst layer, water distribution structure and ozone gas supply structure;Flushing structure, including annular flow guide, flushing pipe and first automatic regulating switch, annular flow guide is sleeved between first catalyst layer and the inner wall of vertical reaction tower, annular flow guide inside is provided with flow guide cavity, flow guide cavity is connected with drainage tube;Flushing pipe is set along the axial direction of vertical reaction tower, and the flushing pipe section above first catalyst layer is peripherally provided with a plurality of first flushing holes;First automatic regulating switch is arranged on flushing pipe;First flow guide opening is arranged on the inner wall of annular flow guide, and first flow guide opening is provided with first electric door.This application can be targeted to remove the pollution layer on first catalyst layer, to avoid the pollution layer to hinder sewage and catalyst contact and reduce mass transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to an ozone catalytic oxidation wastewater treatment device. Background Technology

[0002] Ozone catalytic oxidation wastewater treatment equipment is a deep treatment device that utilizes the synergistic effect of ozone and catalysts to degrade recalcitrant pollutants. It is widely used in industrial wastewater upgrading and municipal sewage purification. Its core structure revolves around a reaction tower: the reaction tower is mostly a cylindrical, sealed container, which is the main site for pollutant oxidation reactions; the inner middle layer is filled with a first catalyst layer, which is mostly a fixed-bed structure, filled with granular catalysts such as MnO2 / activated carbon and TiO2 / ceramsite, providing active sites for ozone decomposition and •OH generation; the ozone inlet structure is located at the bottom of the reaction tower, which releases ozone evenly in the form of micron-sized bubbles through an annular microporous aerator, enhancing gas-liquid contact efficiency; the wastewater inlet structure is located at the top of the reaction tower, forming an umbrella-shaped water flow through a water distribution pipe, allowing wastewater to flow from top to bottom through the first catalyst layer and mix thoroughly with the rising ozone bubbles in a counter-current manner. Its working principle is as follows: under the action of active sites on the catalyst surface, ozone is decomposed into hydroxyl radicals (・OH) through electron transfer or chemical bond breaking. ・OH attacks large organic molecules (such as dyes and pesticides) in wastewater with strong oxidizing properties and non-selectivity, gradually oxidizing them into small molecules, and finally mineralizing them into carbon dioxide and water, thus achieving efficient removal of pollutants.

[0003] After long-term operation, suspended particles, colloidal substances, and dissolved organic matter in the wastewater will gradually accumulate on the upper side of the first catalyst layer, forming a complex fouling layer. This layer has a diverse composition, including inorganic scale (such as calcium and magnesium salts), biofilm, and organic polymers, which not only hinders the effective contact between wastewater and the catalyst but also reduces mass transfer efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an ozone catalytic oxidation wastewater treatment device, which aims to solve the technical problems mentioned in the background art.

[0005] The embodiments of this utility model are implemented as follows: This application provides an ozone catalytic oxidation wastewater treatment device, comprising: a wastewater treatment device body, including a vertical reaction tower, a first catalyst layer disposed within the vertical reaction tower, a water distribution structure for distributing wastewater, and an ozone supply structure for supplying ozone; and a flushing structure, including an annular guide member, a flushing pipe, and a first automatic adjustment switch. The annular guide member is sleeved between the first catalyst layer and the inner wall of the vertical reaction tower. A flow guide cavity is provided inside the annular guide member, and a flow guide pipe is connected to the flow guide cavity. One end of the flow guide pipe communicates with the flow guide cavity, and the other end extends to... The above-mentioned vertical reaction tower is external; the above-mentioned flushing pipe is arranged along the axial direction of the above-mentioned vertical reaction tower, with one end extending to the upper side of the above-mentioned first catalyst layer and the other end extending to the outer side of the top of the above-mentioned vertical reaction tower. The flushing pipe section above the above-mentioned first catalyst layer is provided with a plurality of first flushing holes in the circumferential direction; the above-mentioned first automatic adjustment switch is provided on the above-mentioned flushing pipe for controlling the synchronous opening and closing of all the above-mentioned first flushing holes; wherein, a first flow guide opening communicating with the above-mentioned flow guide cavity is provided on the inner side wall of the annular flow guide above the above-mentioned first catalyst layer, and a first electric door that can be opened and closed is provided at the above-mentioned first flow guide opening.

[0006] Furthermore, based on the aforementioned scheme, the first automatic adjustment switch includes: a magnetic annular seal, which is slidably sleeved on the flushing pipe for uniformly opening and closing all the first flushing holes; an electromagnet, which is disposed on the outer wall of the flushing pipe above the magnetic annular seal and magnetically attracted to the magnetic annular seal; and a spring, which is sleeved on the flushing pipe between the magnetic annular seal and the electromagnet for elastically pressing the magnetic annular seal downward.

[0007] Furthermore, based on the aforementioned scheme, the first electric door includes: a sealing door, which can be vertically slidably disposed on the annular guide member, for controlling the opening or closing of the first guide opening; and an electric telescopic rod, for controlling the sliding of the sealing door.

[0008] Furthermore, based on the aforementioned scheme, the annular guide member is provided with a guide groove adapted to the vertical sliding of the sealing door.

[0009] Furthermore, based on the aforementioned scheme, the first flow guide opening is annular and distributed along the circumferential direction of the vertical reaction tower.

[0010] Furthermore, based on the aforementioned scheme, a second catalyst layer and a third catalyst layer are sequentially and alternately arranged inside the vertical reaction tower above the first catalyst layer. The porosity of the first catalyst layer is smaller than that of the second catalyst layer, and the porosity of the second catalyst layer is smaller.

[0011] Furthermore, based on the aforementioned scheme, the flushing pipe section above the second catalyst layer is provided with a plurality of second flushing holes circumferentially, and the flushing pipe section above the third catalyst layer is provided with a plurality of third flushing holes circumferentially. A second automatic adjustment switch and a third automatic adjustment switch are provided on the flushing pipe. The second automatic adjustment switch is used to control the synchronous opening and closing of all the second flushing holes, and the third automatic adjustment switch is used to control the synchronous opening and closing of all the third flushing holes. A second flow guide opening communicating with the flow guide cavity is provided on the inner wall of the annular flow guide above the second catalyst layer, and a second electric door that can be opened and closed is provided at the second flow guide opening. A third flow guide opening communicating with the flow guide cavity is provided on the inner wall of the annular flow guide above the third catalyst layer, and a third electric door that can be opened and closed is provided at the third flow guide opening.

[0012] Furthermore, based on the aforementioned scheme, the flushing pipe extending to the outer side of the top of the aforementioned vertical reaction tower is sequentially connected to a pulse valve and a premixing tank, and the aforementioned premixing tank is connected to a water injection pipe and a gas injection pipe.

[0013] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: When the first catalyst layer of this application needs to be flushed, the flushing pipe is connected to an external water source, the first automatic regulating switch is turned on, and the flushing pipe sprays flushing water onto the contaminant layer on the upper side of the first catalyst layer through the first flushing hole. At the same time, the first electric gate opens, and the first guide opening of the annular guide member connects the guide cavity with the inside of the reaction tower. The flushed contaminant mixture enters the guide cavity through the first guide opening and is then discharged from the reaction tower through the drain pipe. When flushing is not required, the first automatic regulating switch and the first electric gate are closed, without affecting normal wastewater treatment. Its advantages are that it can specifically remove the contaminant layer on the first catalyst layer, avoiding the contaminant layer from hindering the contact between wastewater and catalyst and reducing mass transfer efficiency, thus ensuring the treatment effect of the device; and the automatic flushing is achieved through the automatic regulating switch and the electric gate, which facilitates operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 An isometric view of an ozone catalytic oxidation wastewater treatment device according to an embodiment of this utility model. Figure 1 ; Figure 2 An isometric view of an ozone catalytic oxidation wastewater treatment device according to an embodiment of this utility model. Figure 2 ; Figure 3 This is a cross-sectional view of an ozone catalytic oxidation wastewater treatment device according to an embodiment of the present invention; Figure 4 for Figure 3 A magnified view of part A in the image; Figure 5 for Figure 3 A magnified view of part B in the image; Figure 6 for Figure 3 A magnified view of part C; Figure 7 for Figure 3 A magnified view of part D; Figure 8 This is an isometric view of the annular guide component according to an embodiment of the present invention; Figure 9 This is an isometric view of the cooperation between the annular guide and the electric telescopic rod in an embodiment of this utility model; Figure 10 for Figure 9 A magnified view of part E in the image; Figure 11 This is an isometric view of the electric telescopic rod and three sealing doors in an embodiment of this utility model.

[0016] Icons: 1-Vertical reaction tower, 2-Water supply pipe, 3-Electric telescopic rod, 4-Flushing pipe, 5-Pulse valve, 6-Premixing tank, 7-Water injection pipe, 8-Air injection pipe, 9-Exhaust port, 10-Annular guide, 11-Drainage pipe, 12-First catalyst layer, 13-Second catalyst layer, 14-Third catalyst layer, 15-Aeration disc, 16-Air supply pipe, 17-Drain outlet, 18-Drive ring, 19-First guide opening, 20-Second guide opening, 21-Third guide opening, 22-First electric door, 23-Guide chute, 24-Guide cavity, 25-Second electric door, 26-Third electric door, 27-First automatic adjustment switch, 2701-Magnetic annular seal, 2702-Spring, 2703-Magnet, 28-First flushing hole, 29-Second automatic adjustment switch, 30-Third automatic adjustment switch, 31-Water distributor, 32-Drive rod. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0018] Please refer to Figures 1-11This application provides an ozone catalytic oxidation wastewater treatment device, comprising: a wastewater treatment device body, including a vertical reaction tower 1, a first catalyst layer 12 disposed within the vertical reaction tower 1, a water distribution structure for distributing wastewater, and an ozone supply structure for supplying ozone; and a flushing structure, including an annular guide member 10, a flushing pipe 4, and a first automatic adjustment switch 27. The annular guide member 10 is sleeved between the first catalyst layer 12 and the inner wall of the vertical reaction tower 1. A flow guiding cavity 24 is provided inside the annular guide member 10. The flow guiding cavity 24 is connected to a guide pipe 11, one end of which communicates with the flow guiding cavity 24, and the other end extends to the upper... The vertical reaction tower 1 is externally located; the flushing pipe 4 is arranged along the axial direction of the vertical reaction tower 1, with one end extending to the upper side of the first catalyst layer 12 and the other end extending to the outer side of the top of the vertical reaction tower 1. The flushing pipe 4 section above the first catalyst layer 12 is provided with a plurality of first flushing holes 28 circumferentially. The first automatic adjustment switch 27 is provided on the flushing pipe 4 to control the synchronous opening and closing of all the first flushing holes 28. The inner wall of the annular guide member 10 above the first catalyst layer 12 is provided with a first guide opening 19 communicating with the guide cavity 24. The first guide opening 19 is provided with a first electric door 22 that can be opened and closed.

[0019] When the first catalyst layer 12 of this application needs to be flushed, the flushing pipe 4 is connected to an external water source, the first automatic regulating switch 27 is turned on, and the flushing pipe 4 sprays flushing water onto the contaminant layer on the upper side of the first catalyst layer 12 through the first flushing hole 28. At the same time, the first electric door 22 opens, and the first guide opening 19 of the annular guide member 10 connects the guide cavity 24 with the inside of the reaction tower. The flushed contaminant mixture enters the guide cavity 24 through the first guide opening 19 and is then discharged from the reaction tower through the drain pipe 11. When flushing is not required, the first automatic regulating switch 27 and the first electric door 22 are closed, without affecting normal wastewater treatment. Its advantages are that it can specifically remove the contaminant layer on the first catalyst layer 12, avoiding the contaminant layer from hindering the contact between wastewater and catalyst and reducing mass transfer efficiency, thus ensuring the treatment effect of the device; and the automatic flushing is achieved through the automatic regulating switch and the electric door, which facilitates operation.

[0020] Preferably, the first flow guide opening 19 and any of the first flushing holes 28 are on the same horizontal plane, and the lower side of the first flow guide opening 19 extends to the upper side of the first catalyst layer 12. This allows the flushing water to more effectively clean the contaminant layer on the upper side of the first catalyst layer 12 and discharge the contaminant mixture, avoiding contaminant residue and ensuring the contact efficiency between the first catalyst layer 12 and the wastewater.

[0021] The ozone supply structure includes an aeration disc 15, which is connected to an air supply pipe 16. The air supply pipe 16 is used to connect to an ozone source. The water distribution structure includes a water distributor 31 and a water supply pipe 2. One end of the water supply pipe 2 is connected to the water distributor 31, and the other end is used to connect to an external water source.

[0022] The vertical reaction tower 1 is provided with a drain outlet 17 and an exhaust outlet 9 at its bottom and top, respectively.

[0023] In a preferred embodiment, the first automatic adjustment switch 27 includes: a magnetic annular seal 2701, which is slidably sleeved on the flushing pipe 4 for uniformly opening and closing all the first flushing holes 28; an electromagnet 2703, which is disposed on the outer wall of the flushing pipe 4 above the magnetic annular seal 2701 and magnetically engages with the magnetic annular seal 2701; and a spring 2702, which is sleeved on the flushing pipe 4 between the magnetic annular seal 2701 and the electromagnet 2703 for elastically pressing the magnetic annular seal 2701 downward.

[0024] In the above embodiment, when the first flushing hole 28 is opened, the electromagnet 2703 is energized to generate magnetic force, attracting the magnetic annular seal 2701 to slide upward and compress the spring 2702, thus opening all the first flushing holes 28; when closed, the electromagnet 2703 is de-energized, the magnetic force disappears, the spring 2702 elastically resets, pushing the magnetic annular seal 2701 downward to seal all the first flushing holes 28. The advantages are that the synchronous opening and closing of all the first flushing holes 28 is achieved through the cooperation of magnetic attraction and spring 2702, resulting in good consistency of action; the sliding seal of the magnetic annular seal 2701 provides a reliable sealing effect; and the use of the electromagnet 2703 for control allows for rapid response and easy automation, with a simple structure and easy maintenance.

[0025] In a preferred embodiment, the first electric door 22 includes: a sealing door, which is vertically slidably disposed on the annular guide member 10 for controlling the opening or closing of the first guide opening 19; and an electric telescopic rod 3 for controlling the sliding of the sealing door.

[0026] In the above embodiment, when the electric telescopic rod 3 extends or retracts, it drives the sealing door to slide vertically along the annular guide member 10. When the electric telescopic rod 3 extends, the sealing door slides down to close the first guide opening 19; when the electric telescopic rod 3 shortens, the sealing door rises to open the first guide opening 19, thereby achieving control over the opening and closing state of the first guide opening 19. The advantages are that the vertically sliding sealing door can fit tightly against the edge of the first guide opening 19, resulting in a good sealing effect; the electric telescopic rod 3 is directly driven, providing precise control and rapid response; the structure is simple, with few parts, facilitating installation and maintenance, and can stably cooperate with the flushing process to achieve timely discharge of the pollutant mixture and reliable sealing during normal operation of the device.

[0027] In a preferred embodiment, the annular guide member 10 is provided with a guide groove 23 adapted to the vertical sliding of the sealing door.

[0028] In the above embodiments, the guide groove 23 can provide precise guidance for the vertical sliding of the sealing door, avoid sliding deviation, and ensure the sealing effect of the sealing door on the first guide opening 19 and the smooth opening and closing.

[0029] In a preferred embodiment, the first flow guide opening 19 is annular and distributed along the circumferential direction of the vertical reaction tower 1.

[0030] In the above embodiment, the design of the annular first guide opening 19 can uniformly discharge the pollutant mixture generated during flushing along the circumference of the vertical reaction tower, thereby improving the discharge efficiency and reducing pollutant residue.

[0031] Specifically, a reinforcing column is provided inside the flow guiding cavity 24 to ensure the structural stability of the annular flow guiding component 10.

[0032] In a preferred embodiment, a second catalyst layer 13 and a third catalyst layer 14 are sequentially and spaced apart inside the vertical reaction tower 1 above the first catalyst layer 12. The porosity of the first catalyst layer 12 is smaller than that of the second catalyst layer 13, and the porosity of the second catalyst layer 13 is smaller.

[0033] In the above embodiments, the second catalyst layer 13 and the third catalyst layer 14 can achieve graded catalytic degradation of pollutants of different sizes in wastewater. The first catalyst layer 12 with smaller pores can efficiently treat small molecule pollutants, while the second and third catalyst layers 14 with progressively larger pores can adapt to larger pollutants, thereby improving the overall degradation efficiency. At the same time, the gradient pore setting can reduce the clogging of pollutants in the catalyst layers and extend the service life of each layer.

[0034] In a preferred embodiment, the flushing pipe 4 section above the second catalyst layer 13 is provided with a plurality of second flushing holes in its circumferential direction, and the flushing pipe 4 section above the third catalyst layer 14 is provided with a plurality of third flushing holes in its circumferential direction. The flushing pipe 4 is provided with a second automatic adjustment switch 29 and a third automatic adjustment switch 30. The second automatic adjustment switch 29 is used to control the synchronous opening and closing of all the second flushing holes, and the third automatic adjustment switch 30 is used to control the synchronous opening and closing of all the third flushing holes. In addition, a second flow opening 20 communicating with the flow guiding cavity 24 is provided on the inner wall of the annular flow guide 10 above the second catalyst layer 13. A second electric door 25 that can be opened and closed is provided at the second flow opening 20. A third flow opening 21 communicating with the flow guiding cavity 24 is provided on the inner wall of the annular flow guide 10 above the third catalyst layer 14. A third electric door 26 that can be opened and closed is provided at the third flow opening 21.

[0035] In the above embodiment, when rinsing the second catalyst layer 13, the second automatic adjustment switch 29 opens the second rinsing hole to spray rinsing water, the second electric door 25 opens, and the pollutant mixture enters the guide cavity 24 through the second guide opening 20 and is discharged; when rinsing the third catalyst layer 14, the third automatic adjustment switch 30 opens the third rinsing hole, the third electric door 26 opens, and the pollutant mixture enters the guide cavity 24 through the third guide opening 21 and is discharged; during normal operation, all switches and electric doors are closed.

[0036] Optionally, the structures of the first automatic adjustment switch 27, the second automatic adjustment switch 29, and the third automatic adjustment switch 30 are all identical. The first electric door 22, the second electric door 25, and the third electric door 26 all include a sealing door, and the three electric doors are connected to the same electric telescopic rod 3 to ensure that the three sealing doors open or close simultaneously.

[0037] The aforementioned electric telescopic rod 3 is connected to a transmission ring 18, which is connected to a transmission rod 32. The transmission rod 32 is simultaneously connected to three sealing doors.

[0038] In a preferred embodiment, the flushing pipe 4 extending to the outer side of the top of the vertical reaction tower 1 is connected in sequence to a pulse valve 5 and a premixing tank 6, and the premixing tank 6 is connected to a water injection pipe 7 and a gas injection pipe 8.

[0039] In the above embodiment, water is injected into the premixing tank 6 through the water injection pipe 7, and gas is injected into the premixing tank 6 through the gas injection pipe 8, so that the water and gas are fully mixed in the premixing tank 6 to form a gas-liquid mixture. The pulse valve 5 controls the gas-liquid mixture to enter the flushing pipe 4 in a pulse form, and then spray it out through each flushing hole. The advantage is that the gas-liquid mixture has both liquid flushing force and gas turbulence, and the pulse form can enhance the stripping effect on the contaminant layer on the catalyst layer, especially for stubborn contaminants. The premixing tank 6 ensures uniform gas-liquid mixing, and the pulse valve 5 can flexibly adjust the flushing intensity and frequency to adapt to different contamination levels, improving the flushing targeting and efficiency.

[0040] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0041] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. An ozone catalytic oxidation wastewater treatment device, characterized in that, include: The main body of the wastewater treatment device includes a vertical reaction tower (1), a first catalyst layer (12) disposed in the vertical reaction tower (1), a water distribution structure for distributing wastewater, and an ozone supply structure for supplying ozone. The flushing structure includes an annular guide (10), a flushing pipe (4), and a first automatic adjustment switch (27). The annular guide (10) is sleeved between the first catalyst layer (12) and the inner wall of the vertical reaction tower (1). A flow guiding cavity (24) is provided inside the annular guide (10). The flow guiding cavity (24) is connected to a guide pipe (11). One end of the guide pipe (11) is connected to the flow guiding cavity (24), and the other end extends to the outside of the vertical reaction tower (1). The flushing pipe (4) is arranged along the axial direction of the vertical reaction tower (1), with one end extending to the upper side of the first catalyst layer (12) and the other end extending to the top outside of the vertical reaction tower (1). The flushing pipe (4) section above the first catalyst layer (12) is provided with a plurality of first flushing holes (28) in the circumferential direction. The first automatic adjustment switch (27) is located on the flushing pipe (4) and is used to control the synchronous opening and closing of all the first flushing holes (28); Among them, a first flow opening (19) communicating with the flow cavity (24) is provided on the inner side wall of the annular flow guide (10) above the first catalyst layer (12), and a first electric door (22) that can be opened and closed is provided at the first flow opening (19).

2. The ozone catalytic oxidation wastewater treatment device according to claim 1, characterized in that, The first automatic adjustment switch (27) includes: A magnetic annular seal (2701) is slidably fitted onto the flushing pipe (4) and is used to open and close all the first flushing holes (28) at the same time. An electromagnet (2703) is disposed on the outer wall of the flushing pipe (4) above the magnetic annular seal (2701) and magnetically engages with the magnetic annular seal (2701). A spring (2702) is sleeved on the flushing pipe (4) between the magnetic annular seal (2701) and the electromagnet (2703) to elastically press the magnetic annular seal (2701) downward.

3. The ozone catalytic oxidation wastewater treatment device according to claim 1, characterized in that, The first electric door (22) includes: A sealing door is vertically slidably mounted on the annular guide (10) to control the opening or closing of the first guide opening (19); An electric telescopic rod (3) is used to control the sliding of the sealed door.

4. The ozone catalytic oxidation wastewater treatment device according to claim 3, characterized in that, The annular guide (10) is provided with a guide groove (23) adapted to the vertical sliding of the sealing door.

5. The ozone catalytic oxidation wastewater treatment device according to claim 4, characterized in that, The first flow guide opening (19) is annular and distributed along the circumferential direction of the vertical reaction tower (1).

6. The ozone catalytic oxidation wastewater treatment device according to claim 1, characterized in that, The vertical reaction tower (1) above the first catalyst layer (12) is provided with a second catalyst layer (13) and a third catalyst layer (14) arranged sequentially at intervals. The porosity of the first catalyst layer (12) is smaller than that of the second catalyst layer (13), and the porosity of the second catalyst layer (13) is smaller.

7. The ozone catalytic oxidation wastewater treatment device according to claim 6, characterized in that, The flushing pipe (4) section above the second catalyst layer (13) is provided with a plurality of second flushing holes in the circumferential direction, and the flushing pipe (4) section above the third catalyst layer (14) is provided with a plurality of third flushing holes in the circumferential direction. The flushing pipe (4) is provided with a second automatic adjustment switch (29) and a third automatic adjustment switch (30). The second automatic adjustment switch (29) is used to control the synchronous opening and closing of all the second flushing holes, and the third automatic adjustment switch (30) is used to control the synchronous opening and closing of all the third flushing holes. Among them, a second flow opening (20) communicating with the flow cavity (24) is provided on the inner wall of the annular flow guide (10) above the second catalyst layer (13), and a second electric door (25) that can be opened and closed is provided at the second flow opening (20). A third flow opening (21) communicating with the flow cavity (24) is provided on the inner wall of the annular flow guide (10) above the third catalyst layer (14), and a third electric door (26) that can be opened and closed is provided at the third flow opening (21).

8. The ozone catalytic oxidation wastewater treatment device according to claim 1, characterized in that, The flushing pipe (4) extending to the outside of the top of the vertical reaction tower (1) is connected in sequence to a pulse valve (5) and a premixing tank (6), and the premixing tank (6) is connected to a water injection pipe (7) and a gas injection pipe (8).

Images