Separated catalytic ozonation tower

Abstract

The utility model is applicable to the technical field of wastewater treatment, and particularly relates to a separated ozone catalytic oxidation tower which comprises an oxidation tower body, a separation plate is vertically arranged in the middle area in the oxidation tower body, and the interior of the oxidation tower body is divided into a primary reaction area and a secondary reaction area by the separation plate; a supporting layer is connected to the interior of the first-stage reaction region. According to the utility model, the primary reaction zone and the secondary reaction zone are separately arranged, and ozone catalyst catalytic oxidation and ozone hydrogen peroxide catalytic oxidation treatment are respectively adopted, so that the removal efficiency of complex pollutants in wastewater is improved, and deep purification is realized. Meanwhile, a circulating pump and a jet device are designed, so that ozone and hydrogen peroxide are fully mixed with wastewater, the utilization rate of an oxidant is increased, and the cost is reduced. The whole equipment is compact in structure, multiple towers connected in series are integrated in a single tower, and the occupied space and the operation complexity are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, and specifically relates to a partitioned ozone catalytic oxidation tower. Background Art

[0002] Industrial wastewater usually contains a wide variety of organic pollutants with high concentrations and is difficult to degrade. Therefore, in order to effectively remove these pollutants and deeply purify the wastewater, the ozone catalytic oxidation technology, as an advanced oxidation process, is widely used in the field of industrial wastewater treatment. Through the synergistic effect of ozone and a catalyst or other oxidants (such as hydrogen peroxide), the organic substances and refractory substances in the wastewater can be efficiently decomposed, improving the treatment effect.

[0003] However, in the prior art, when using the ozone catalytic oxidation process to treat industrial wastewater, multiple ozone catalytic oxidation towers are usually used in series to carry out oxidation reactions in stages and gradually remove the complex pollutants in the wastewater. Although this multi-tower series treatment method can improve the pollutant removal efficiency, it has significant technical defects: it occupies a large area, has a high construction cost, and complex flow-through pipelines and valves are required to connect between multiple towers, resulting in complex operation, increasing the maintenance difficulty and management cost of the system.

[0004] Therefore, the existing multi-tower series process has many inconveniences and limitations in practical applications. In view of these problems, the present invention provides a partitioned ozone catalytic oxidation tower to solve the above technical defects. Content of the Utility Model

[0005] The purpose of the embodiment of the utility model is to provide a partitioned ozone catalytic oxidation tower, aiming to solve the technical problems mentioned in the background art.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A partitioned ozone catalytic oxidation tower includes an oxidation tower body. A partition plate is vertically arranged in the middle area inside the oxidation tower body, and the inside of the oxidation tower body is divided into a primary reaction area and a secondary reaction area by the partition plate;

[0008] A support layer is connected inside the primary reaction area, and a catalyst filling layer is arranged on the surface of the support layer. A wastewater inlet is arranged at the bottom of the primary reaction area, and a first water collector is installed at the top of the primary reaction area. A diversion pipe is connected to the outside of the first water collector, and the end of the diversion pipe away from the first water collector is arranged at the bottom of the primary reaction area. A second water collector is installed at the top of the secondary reaction area. An outlet is arranged at the top of the secondary reaction area, and the second water collector is communicated with the outlet;

[0009] A first circulating water inlet is provided at the bottom of the first-stage reaction zone, and a first connecting water pipe is connected to the outside of the first circulating water inlet. A first ejector is installed at one end of the first connecting water pipe away from the first circulating water inlet, and a first ozone injection port is arranged outside the first ejector. A first circulating water outlet is arranged inside the first-stage reaction zone near the catalyst packing layer, and a first circulating water pipe is connected to the outside of the first circulating water outlet. A first circulating pump is installed at one end of the first circulating water pipe away from the first circulating water outlet;

[0010] A second circulating water inlet is provided at the bottom of the second-stage reaction zone, and a second connecting water pipe is connected to the outside of the second circulating water inlet. A second ejector is installed at one end of the second connecting water pipe away from the second circulating water inlet, and a second ozone injection port is arranged outside the second ejector. A second circulating water outlet is arranged inside the oxidation tower body, and a second circulating water pipe is connected to the outside of the second circulating water outlet. A second circulating pump is installed at one end of the second circulating water pipe away from the second circulating water outlet;

[0011] A pipe mixer is arranged outside the second circulating water pipe, and the pipe mixer is communicated with the inside of the second circulating water pipe.

[0012] Further, one end of the first circulating pump away from the first circulating water pipe is communicated with the first ejector, one end of the second circulating pump away from the second circulating water pipe is communicated with the second ejector, and the height of the second circulating water outlet is the same as that of the first circulating water outlet.

[0013] Further, a cleaning water inlet is provided at the bottom of the first-stage reaction zone, and a cleaning water outlet is provided at the top of the first-stage reaction zone.

[0014] Further, a liquid caustic soda dosing port and an online pH meter connection port are provided at the top of the second-stage reaction zone.

[0015] Further, a backwashing air inlet is provided at the bottom of the first-stage reaction zone.

[0016] Further, a first venting port and a second venting port are respectively provided at the bottoms of the first-stage reaction zone and the second-stage reaction zone.

[0017] Further, a discharge port is provided inside the first-stage reaction zone near the supporting layer.

[0018] Further, an upper maintenance opening is provided at the top of the first-stage reaction zone, a first lower maintenance opening and a second lower maintenance opening are respectively provided at the bottoms of the first-stage reaction zone and the second-stage reaction zone, and a top maintenance opening is provided at the top of the oxidation tower body.

[0019] Further, a breather valve is provided at the top of the oxidation tower body.

[0020] Further, an exhaust port is provided at the top of the oxidation tower body.

[0021] The separated ozone catalytic oxidation tower provided by the present utility model has the following beneficial effects:

[0022] By separately arranging the primary reaction zone and the secondary reaction zone, and respectively adopting ozone catalyst catalytic oxidation and ozone-hydrogen peroxide catalytic oxidation treatment, the removal efficiency of complex pollutants in wastewater is improved, and deep purification is realized. At the same time, a circulation pump and a jet injector are designed to ensure the full mixing of ozone and hydrogen peroxide with the wastewater, improve the utilization rate of oxidants, and reduce costs. The overall equipment structure is compact, integrating the multi-tower series treatment into a single tower, reducing the occupied space and operation complexity. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a separated ozone catalytic oxidation tower.

[0024] Figure 2 It is a right view of a separated ozone catalytic oxidation tower.

[0025] Figure 3 It is a left view of a separated ozone catalytic oxidation tower.

[0026] Figure 4 It is a top view of a separated ozone catalytic oxidation tower.

[0027] In the figure: 1. Oxidation tower body; 2. Secondary reaction zone; 3. Primary reaction zone; 4. Top maintenance opening; 5. Breathing valve; 6. Liquid caustic soda dosing port; 7. Second water collector; 8. Water outlet; 9. Second circulating water outlet; 10. Second circulating water pipe; 11. Pipe mixer; 12. Second jet injector; 13. Second ozone injection port; 14. Second connecting water pipe; 15. Second circulating water inlet; 16. Partition board; 17. Diversion pipe; 18. First circulating water outlet; 19. Catalyst filling layer; 20. First circulating water pipe; 21. Discharge port; 22. Support layer; 23. First connecting water pipe; 24. Wastewater inlet; 25. Cleaning water inlet; 26. Backwashing air inlet; 27. First circulating water inlet; 28. First ozone injection port; 29. First jet injector; 30. First water collector; 31. Exhaust port; 32. Cleaning water outlet; 33. Upper maintenance opening; 34. First lower maintenance opening; 35. Second venting port; 36. Online pH meter connection port; 37. Second lower maintenance opening; 38. First venting port; 39. First circulating pump; 40. Second circulating pump. Detailed Embodiments

[0028] In order to make the objectives, technical solutions and advantages of the present utility model more clearly understood, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0029] The following describes in detail the specific implementation of the present utility model in conjunction with specific embodiments.

[0030] As Figures 1-4 shown, a partitioned ozone catalytic oxidation tower provided by an embodiment of the present utility model includes an oxidation tower body 1. A partition plate 16 is vertically arranged in the middle area inside the oxidation tower body 1, and the inside of the oxidation tower body 1 is separated by the partition plate 16 to form a primary reaction zone 3 and a secondary reaction zone 2. The oxidation tower body 1 has a cylindrical structure with a conical cover design at the top, and the top is connected to the inside of the primary reaction zone 3 and the secondary reaction zone 2. Both the primary reaction zone 3 and the secondary reaction zone 2 are semi-cylindrical. The wastewater is subjected to catalytic oxidation treatment with ozone and a catalyst in the primary reaction zone 3, while in the secondary reaction zone 2, a catalytic oxidation treatment method with ozone and hydrogen peroxide is adopted.

[0031] A support layer 22 is connected inside the primary reaction zone 3, and a catalyst filling layer 19 is arranged on the surface of the support layer 22. The support layer 22 is located inside the primary reaction zone 3 and is used to support the catalyst filling layer 19 to ensure its stability and uniform distribution. The support layer 22 is usually made of a corrosion-resistant material and has good mechanical strength to withstand the pressure and impact during the flow of wastewater. The catalyst filling layer 19 is arranged on the surface of the support layer 22 and is a layer composed of a specific ozone catalyst material, which is used to promote the reaction rate and treatment effect of ozone in wastewater. By improving the contact efficiency between ozone and pollutants, it effectively degrades the organic pollutants and refractory substances in the wastewater.

[0032] A wastewater inlet 24 is arranged at the bottom of the primary reaction zone 3, and a first water collector 30 is installed at the top of the primary reaction zone 3. A diversion pipe 17 is connected to the outside of the first water collector 30, and one end of the diversion pipe 17 away from the first water collector 30 is arranged at the bottom of the primary reaction zone 3. A second water collector 7 is installed at the top of the secondary reaction zone 2, an outlet 8 is arranged at the top of the secondary reaction zone 2, and the second water collector 7 is communicated with the outlet 8.

[0033] At the bottom of the primary reaction zone 3, there is a first circulating water inlet 27, and a first connecting water pipe 23 is connected to the outside of the first circulating water inlet 27. At one end of the first connecting water pipe 23 far from the first circulating water inlet 27, a first ejector 29 is installed, and a first ozone injection port 28 is arranged outside the first ejector 29. Inside the primary reaction zone 3, at a position close to the catalyst packing layer 19, there is a first circulating water outlet 18, and a first circulating water pipe 20 is connected to the outside of the first circulating water outlet 18. At one end of the first circulating water pipe 20 far from the first circulating water outlet 18, a first circulating pump 39 is installed.

[0034] At the bottom of the secondary reaction zone 2, there is a second circulating water inlet 15, and a second connecting water pipe 14 is connected to the outside of the second circulating water inlet 15. At one end of the second connecting water pipe 14 far from the second circulating water inlet 15, a second ejector 12 is installed, and a second ozone injection port 13 is arranged outside the second ejector 12. Inside the oxidation tower body 1, there is a second circulating water outlet 9, and a second circulating water pipe 10 is connected to the outside of the second circulating water outlet 9. At one end of the second circulating water pipe 10 far from the second circulating water outlet 9, a second circulating pump 40 is installed. One end of the first circulating pump 39 far from the first circulating water pipe 20 is communicated with the first ejector 29, and one end of the second circulating pump 40 far from the second circulating water pipe 10 is communicated with the second ejector 12. The height of the second circulating water outlet 9 is the same as that of the first circulating water outlet 18.

[0035] A pipe mixer 11 is arranged outside the second circulating water pipe 10, and the pipe mixer 11 is communicated with the inside of the second circulating water pipe 10.

[0036] In an embodiment of the present utility model, a new batch of wastewater enters the primary reaction zone 3 through the wastewater inlet 24. As the liquid level rises, the solid debris in the wastewater is intercepted and filtered by the catalyst packing layer 19. When the wastewater liquid level reaches the first circulating water outlet 18, the first circulating pump 39 is started, and the wastewater is pumped into the first ejector 29 through the first circulating water pipe 20. During this process, external ozone is injected into the first ejector 29 through the first ozone injection port 28, so that the ozone is fully mixed with the wastewater. The mixed wastewater returns to the primary reaction zone 3 again through the first connecting water pipe 23 and the first circulating water inlet 27, realizing the catalytic oxidation treatment of the ozone catalyst for multiple times. After multiple cycles, the ozone continuously dissolves and reacts with the wastewater, promoting the degradation of pollutants.

[0037] After the wastewater in the primary reaction zone 3 has fully reacted, the suction effect of the first water collector 30 is utilized to introduce the wastewater into the diversion pipe 17 and inject it into the bottom of the secondary reaction zone 2 through the diversion pipe 17. When the wastewater level rises to reach the second circulating water outlet 9, the second circulating pump 40 is started, and the wastewater is pumped into the second ejector 12 through the second circulating water pipe 10. Meanwhile, external hydrogen peroxide is injected into the second circulating water pipe 10 through the pipe mixer 11, and ozone is injected into the second ejector 12 through the second ozone injection port 13, so that the wastewater is fully mixed with ozone and hydrogen peroxide. The mixed wastewater is then reinjected into the bottom of the secondary reaction zone 2 by the second circulating pump 40 for multiple ozone-hydrogen peroxide catalytic oxidation treatments. The wastewater after sufficient reaction is discharged from the secondary reaction zone 2 through the water outlet 8 and enters the subsequent treatment unit.

[0038] In summary, by separately arranging the primary reaction zone 3 and the secondary reaction zone 2, and respectively adopting ozone catalyst catalytic oxidation and ozone-hydrogen peroxide catalytic oxidation treatments, the present utility model improves the removal efficiency of complex pollutants in wastewater and achieves deep purification. Meanwhile, a circulating pump and an ejector are designed to ensure the full mixing of ozone and hydrogen peroxide with the wastewater, improve the utilization rate of the oxidant, and reduce the cost. The overall equipment structure is compact, integrating the multi-tower series treatment into a single tower, reducing the occupied space and operation complexity.

[0039] In this embodiment, a cleaning water inlet 25 is provided at the bottom of the primary reaction zone 3, and a cleaning water outlet 32 is provided at the top. By injecting cleaning water into the primary reaction zone 3 through the cleaning water inlet 25, the supporting layer 22, the catalyst filling layer 19, and the inner wall of the primary reaction zone 3 can be effectively and comprehensively flushed. This process can remove the particulate matter and suspended matter attached to the catalyst filling layer 19 and the supporting layer 22, and at the same time remove the dirt and impurities deposited on the inner wall of the reaction zone, prevent blockage and scaling, and maintain the efficient operation of the device. Regular cleaning can also extend the service life of the equipment, ensure the continuous stability of the activity of the catalyst and the reaction efficiency, so as to improve the overall effect of sewage treatment.

[0040] In this embodiment, a liquid alkali dosing port 6 and an on-line pH meter connection port 36 are provided at the top of the secondary reaction zone 2. By dosing liquid alkali and real-time monitoring of the on-line pH data, the pH value in the reaction zone can be accurately adjusted and maintained within an appropriate range. This control method can optimize the ozone oxidation reaction conditions, promote the generation of hydroxyl radicals (·OH), enhance the reaction efficiency of ozone with pollutants, and accelerate the degradation process of organic pollutants. At the same time, by maintaining an appropriate pH value, the adverse effects of overly acidic or alkaline conditions on the activity of the catalyst can be avoided, ensuring the stable and efficient progress of the catalytic oxidation reaction in the secondary reaction zone, thereby further improving the sewage treatment effect.

[0041] In this embodiment, an anti-flushing air inlet 26 is provided at the bottom of the primary reaction zone 3. The pressurized air flow input through this inlet can effectively scour the support layer 22 and the catalyst filling layer 19 inside the primary reaction zone, removing the intercepted particulate matter and suspended matter. In practical applications, in order to cope with the possible blockage caused by suspended matter, the present utility model designs a cleaning method combining "air backwashing" and "water backwashing". "Air backwashing" utilizes the strong impact force of the pressurized air flow to effectively remove solid impurities; "water backwashing" further cleans the inside of the reaction zone and flushes away the residual substances through the water flow. The combined application of the two backwashing methods helps prevent blockage, ensures the continuous and efficient operation of the device, extends the service life of the equipment, and maintains the stability and reliability of the sewage treatment process.

[0042] In this embodiment, a first venting port 38 and a second venting port 35 are respectively provided at the bottoms of the primary reaction zone 3 and the secondary reaction zone 2. When it is necessary to empty the sewage in the reaction zone, the corresponding first venting port 38 or second venting port 35 can be opened to quickly discharge the sewage inside. This design facilitates quickly emptying the inside of the reaction zone during equipment maintenance, repair or in case of emergency, preventing sewage retention and pollution problems caused by equipment failure or other reasons. At the same time, the setting of the venting port also helps improve the operation efficiency, ensure the safety and cleanliness of the equipment, and further optimize the operation management of sewage treatment when replacing the catalyst or conducting a thorough cleaning operation.

[0043] In this embodiment, a discharge port 21 is provided inside the primary reaction zone 3 near the support layer 22. By opening the discharge port 21, it is convenient to unload the filling materials in the support layer 22 and the catalyst filling layer 19. This design makes it more rapid and efficient to replace or clean the catalyst filling layer 19 when needed, reduces the downtime, and improves the maintenance work efficiency. In addition, the setting of the discharge port 21 helps regularly remove the accumulated impurities and deactivated catalysts, maintain the activity and reaction effect of the catalyst, thereby ensuring the continuous and efficient operation of the primary reaction zone 3, extending the service life of the equipment, and further enhancing the overall performance of sewage treatment.

[0044] In this embodiment, an upper inspection opening 33 is provided at the top of the primary reaction zone 3, and a first lower inspection opening 34 and a second lower inspection opening 37 are respectively provided at the bottoms of the primary reaction zone 3 and the secondary reaction zone 2. A top inspection opening 4 is also provided at the top of the oxidation tower body 1. Through these inspection openings, it is convenient to inspect, maintain, and repair the interior of each reaction zone and the oxidation tower. The upper inspection opening 33 and the top inspection opening 4 enable operators to quickly enter the interior of the tower body for necessary inspections and repair work, while the first lower inspection opening 34 and the second lower inspection opening 37 help to maintain and replace the equipment, pipelines, and filling materials in the bottom area when needed. The reasonable layout of these inspection openings greatly improves the maintainability and operation convenience of the equipment, shortens the downtime of the equipment, helps to extend the service life of the equipment, and maintains the efficient and stable operation of the system.

[0045] In this embodiment, a breather valve 5 is provided at the top of the oxidation tower body 1. The breather valve 5 is used to regulate the air pressure inside the oxidation tower to ensure that the pressure inside the container always remains within a safe range. Through the breather valve 5, when the pressure inside the tower is too high, the excess gas can be automatically discharged to prevent equipment damage or safety accidents caused by excessive pressure; when the pressure inside the tower is too low, the breather valve 5 allows outside air to enter to balance the internal pressure and prevent structural deformation or damage caused by the vacuum effect. This design not only improves the safety of the system but also ensures the stable operation of the oxidation tower, effectively avoiding the risks brought by abnormal pressure and extending the service life of the equipment.

[0046] In this embodiment, an exhaust port 31 is provided at the top of the oxidation tower body 1, and the exhaust port 31 is connected to a tail gas destruction device. The tail gas destruction device is used to treat and destroy the unreacted ozone-containing gas to avoid ozone being discharged into the environment, causing air pollution and safety hazards. The tail gas destruction device usually converts the ozone in the tail gas into oxygen or harmless substances through catalytic decomposition or thermal decomposition, thereby reducing the emission concentration of ozone.

[0047] The use of the tail gas destruction device can effectively protect the environment, prevent the harm caused by ozone leakage, and at the same time comply with environmental protection regulations and standards, ensuring that the impact of the oxidation tower on the external environment during the treatment process is minimized, and further improving the safety and environmental protection performance of the sewage treatment system.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A separated ozone catalytic oxidation tower, comprising an oxidation tower body (1), characterized in that, In the middle area inside the oxidation tower body (1), a partition plate (16) is vertically arranged, and the inside of the oxidation tower body (1) is separated by the partition plate (16) to form a primary reaction zone (3) and a secondary reaction zone (2); Inside the primary reaction zone (3), a supporting layer (22) is connected, and a catalyst filling layer (19) is arranged on the surface of the supporting layer (22). At the bottom of the primary reaction zone (3), a waste water inlet (24) is arranged, and at the top of the primary reaction zone (3), a first water collector (30) is installed. The outside of the first water collector (30) is connected with a diversion pipe (17), and one end of the diversion pipe (17) far away from the first water collector (30) is arranged at the bottom of the primary reaction zone (3). At the top of the secondary reaction zone (2), a second water collector (7) is installed. At the top of the secondary reaction zone (2), a water outlet (8) is arranged, and the second water collector (7) is communicated with the water outlet (8); At the bottom of the primary reaction zone (3), a first circulating water inlet (27) is arranged, and the outside of the first circulating water inlet (27) is connected with a first communicating water pipe (23). One end of the first communicating water pipe (23) far away from the first circulating water inlet (27) is installed with a first ejector (29), and a first ozone injection port (28) is arranged outside the first ejector (29). At a position inside the primary reaction zone (3) close to the catalyst filling layer (19), a first circulating water outlet (18) is arranged, and the outside of the first circulating water outlet (18) is connected with a first circulating water pipe (20). One end of the first circulating water pipe (20) far away from the first circulating water outlet (18) is installed with a first circulating pump (39); At the bottom of the secondary reaction zone (2), a second circulating water inlet (15) is arranged, and the outside of the second circulating water inlet (15) is connected with a second communicating water pipe (14). One end of the second communicating water pipe (14) far away from the second circulating water inlet (15) is installed with a second ejector (12), and a second ozone injection port (13) is arranged outside the second ejector (12). Inside the oxidation tower body (1), a second circulating water outlet (9) is arranged, and the outside of the second circulating water outlet (9) is connected with a second circulating water pipe (10). One end of the second circulating water pipe (10) far away from the second circulating water outlet (9) is installed with a second circulating pump (40); A pipe mixer (11) is arranged outside the second circulating water pipe (10), and the pipe mixer (11) is communicated with the inside of the second circulating water pipe (10).

2. The divided ozone catalytic oxidation tower according to claim 1, wherein One end of the first circulating pump (39) far away from the first circulating water pipe (20) is communicated with the first ejector (29), one end of the second circulating pump (40) far away from the second circulating water pipe (10) is communicated with the second ejector (12), and the height of the second circulating water outlet (9) is the same as that of the first circulating water outlet (18).

3. The separated ozone catalytic oxidation tower according to claim 1, characterized in that At the bottom of the primary reaction zone (3), a cleaning water inlet (25) is arranged, and at the top of the primary reaction zone (3), a cleaning water outlet (32) is arranged.

4. A separated ozone catalytic oxidation tower according to claim 1, wherein A liquid caustic soda feeding port (6) and an on-line pH meter connection port (36) are arranged at the top of the secondary reaction zone (2).

5. The divided ozone catalytic oxidation tower according to claim 1, wherein An anti-rinse air inlet (26) is arranged at the bottom of the primary reaction zone (3).

6. The separated ozone catalytic oxidation tower according to claim 1, wherein, A first vent port (38) and a second vent port (35) are respectively arranged at the bottoms of the primary reaction zone (3) and the secondary reaction zone (2).

7. The separated ozone catalytic oxidation tower according to claim 1, characterized in that, A discharge port (21) is arranged inside the primary reaction zone (3) near the supporting layer (22).

8. The separated ozone catalytic oxidation tower according to claim 1, characterized in that, An upper maintenance port (33) is arranged at the top of the primary reaction zone (3), a first lower maintenance port (34) and a second lower maintenance port (37) are respectively arranged at the bottoms of the primary reaction zone (3) and the secondary reaction zone (2), and a top maintenance port (4) is arranged at the top of the oxidation tower body (1).

9. The divided ozone catalytic oxidation tower according to claim 1, wherein A breather valve (5) is arranged at the top of the oxidation tower body (1).

10. A partitioned ozone catalytic oxidation tower according to claim 1, characterized in that, An exhaust port (31) is arranged at the top of the oxidation tower body (1).

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