A high-efficiency ozone catalytic oxidation gas dissolving device

Abstract

The utility model relates to sewage treatment technical field provides a kind of for ozone catalytic oxidation high-efficiency gas dissolving device. The ozone catalytic oxidation high-efficiency gas dissolving device includes mixed oxidation pond, gas dissolving mechanism, inclined guide vane and backwashing mechanism. The ozone catalytic oxidation high-efficiency gas dissolving device provided by the utility model generates micro-bubble through venturi tube type micro-bubble generator, and combines fluidized state's heterogeneous ozone catalyst, greatly improves the dissolution efficiency and mass transfer rate of ozone, and moreover, using granular heterogeneous ozone catalyst in the way of circulating fluidization in mixed oxidation pond, fundamentally overcome the technical difficulties that traditional fixed bed catalyst is easy to block and easy to deactivate, catalyst replacement is convenient, finally, through the cooperation of filter screen and backwashing mechanism, effectively prevent catalyst loss, and realize the continuous automatic operation of device.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a high-efficiency dissolved gas device for ozone catalytic oxidation. Background Technology

[0002] Ozone catalytic oxidation technology has become a key process for treating recalcitrant organic pollutants in industrial wastewater due to its advantages such as fast reaction speed, thorough degradation, and no secondary pollution. Current ozone catalytic oxidation technologies in engineering applications typically employ dissolved air methods such as booster pumps and aeration discs, as disclosed in existing technologies (e.g., the scheme disclosed in patent number CN222665576U). Although these methods improve mass transfer by setting up a high-efficiency dissolved air catalytic reactor, they still suffer from limitations such as low ozone solubility and concentration in water, and low overall mass transfer efficiency of the device.

[0003] A more prominent problem is that most existing technologies employ a method of filling the catalyst within a fixed-bed reactor. In practical engineering applications, the catalyst is typically statically fixed inside the reactor, forming a fixed bed. This structure has significant drawbacks: First, suspended solids, colloids, and inorganic salts generated in the wastewater easily deposit and scale on the catalyst surface, shielding its active sites and leading to rapid catalyst deactivation. Second, when the catalyst is deactivated, the replacement or regeneration process is extremely cumbersome, requiring a complete shutdown and disassembly of the equipment for maintenance, severely impacting the continuous and stable operation of wastewater treatment projects and resulting in high maintenance costs.

[0004] Therefore, it is necessary to provide a new high-efficiency dissolved gas device for ozone catalytic oxidation to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high-efficiency dissolved gas device for ozone catalytic oxidation.

[0006] This utility model provides a high-efficiency dissolved air device for ozone catalytic oxidation, comprising: a mixed oxidation tank, a dissolved air mechanism, an inclined guide plate, and a backwashing mechanism. A water outlet pipe is fixedly connected to the upper part of one side of the mixed oxidation tank, and a matching filter screen is fixedly connected to the end of the water outlet pipe near the mixed oxidation tank. The dissolved air mechanism is connected to one side of the mixed oxidation tank, and includes a sewage pump, a pumping pipe, a sewage pipe, a water supply pipe, a Venturi tube microbubble generator, a connecting pipe, an ozone generator, and a gas supply pipe. A sewage pump is installed on one side of the mixed oxidation tank, and the inlet of the sewage pump is fixed via a tee fitting. The system is connected to a pumping pipe and a sewage pipe. The pumping pipe is fixedly connected to the lower part of the other side of the mixed oxidation tank. The outlet of the sewage pump is fixedly connected to a Venturi tube microbubble generator through a water supply pipe. The outlet of the Venturi tube microbubble generator is fixedly connected to the side of the mixed oxidation tank through a connecting pipe. An ozone generator is also installed on one side of the mixed oxidation tank. The outlet of the ozone generator is fixedly connected to the inlet of the Venturi tube microbubble generator through a gas supply pipe. Multiple parallel inclined guide plates are fixedly connected to both inner walls of the mixed oxidation tank. A backwashing mechanism is connected to the outlet pipe.

[0007] Preferably, the backwashing mechanism includes a water pump, an external pipe, a backwash pipe, and an electrically controlled valve. A water pump is installed on one side of the mixed oxidation tank. The inlet of the water pump is fixedly connected to the external pipe. The outlet of the water pump is fixedly connected to the outlet pipe through the backwash pipe. An electrically controlled valve is installed on the end of the outlet pipe away from the mixed oxidation tank.

[0008] Preferably, the backwashing mechanism further includes a timer controller, which is installed on one side of the mixing oxidation tank, and the water pump and the electrically controlled valve are electrically connected to the timer controller.

[0009] Preferably, the other end of the external pipe is fixedly connected to an external water supply pipe.

[0010] Preferably, a matching flange is fixedly connected to one end of both the water outlet pipe and the sewage pipe.

[0011] Preferably, a granular heterogeneous ozone catalyst is added to the bottom of the mixed oxidation tank.

[0012] Preferably, a cleaning pipe is fixedly connected to the front end of the mixed oxidation tank, and a matching cover is threaded to one end of the cleaning pipe.

[0013] Compared with related technologies, the high-efficiency dissolved gas device for ozone catalytic oxidation provided by this utility model has the following beneficial effects:

[0014] This invention provides a high-efficiency dissolved air device for ozone catalytic oxidation. It utilizes a Venturi tube microbubble generator to produce microbubbles, combined with a fluidized heterogeneous ozone catalyst, significantly improving ozone dissolution efficiency and mass transfer rate. Furthermore, the use of granular heterogeneous ozone catalyst circulating in a mixed oxidation tank fundamentally overcomes the technical difficulties of clogging and deactivation inherent in traditional fixed-bed catalysts. Catalyst replenishment and replacement are convenient. Additionally, a serpentine flow path is formed by staggered inclined guide plates, eliminating short-circuiting and dead zones, ensuring full utilization of the reactor volume. Finally, the combination of a filter and backwashing mechanism effectively prevents catalyst loss and enables continuous automated operation. The entire device offers comprehensive advantages including high ozone utilization, long maintenance cycle, stable operation, and low cost. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a structural schematic diagram of the present invention from another angle;

[0017] Figure 3 This is a partial cross-sectional structural diagram of the present invention.

[0018] The diagram is labeled as follows: 1. Mixed oxidation tank; 2. Cleaning pipe; 3. Sewage pump; 4. Pumping pipe; 5. Sewage pipe; 6. Venturi tube microbubble generator; 7. Connecting pipe; 8. Ozone generator; 9. Gas supply pipe; 10. Water outlet pipe; 11. Pump; 12. Backwash pipe; 13. External pipe; 14. Heterogeneous ozone catalyst; 15. Electrically controlled valve; 16. Timer controller; 17. Filter screen; 18. Inclined guide plate; 19. Water supply pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a partial cross-sectional structural diagram of the present invention. It includes: a mixing oxidation tank 1, a dissolved air mechanism, an inclined guide plate 18, and a backwashing mechanism.

[0021] refer to Figure 1 , Figure 2 and Figure 3The mixed oxidation tank 1 is fixedly connected to an outlet pipe 10 on one side of its upper part. A matching filter screen 17 is fixedly connected to the end of the outlet pipe 10 near the mixed oxidation tank 1. A dissolved air mechanism is connected to one side of the mixed oxidation tank 1. The dissolved air mechanism includes a sewage pump 3, a pumping pipe 4, a sewage pipe 5, a water supply pipe 19, a Venturi tube microbubble generator 6, a connecting pipe 7, an ozone generator 8, and a gas supply pipe 9. A sewage pump 3 is installed on one side of the mixed oxidation tank 1. The inlet of the sewage pump 3 is fixedly connected to the pumping pipe 4 and the sewage pipe 5 via a three-way pipe joint. The pumping pipe 4 connects to the other side of the mixed oxidation tank 1. The lower part is fixedly connected, and the outlet of the sewage pump 3 is fixedly connected to the Venturi tube microbubble generator 6 through the water supply pipe 19. The outlet of the Venturi tube microbubble generator 6 is fixedly connected to the side of the mixed oxidation tank 1 through the connecting pipe 7. An ozone generator 8 is also installed on one side of the mixed oxidation tank 1. The gas outlet of the ozone generator 8 is fixedly connected to the gas inlet of the Venturi tube microbubble generator 6 through the gas supply pipe 9. Multiple parallel inclined guide plates 18 are fixedly connected to both inner side walls of the mixed oxidation tank 1. A granular heterogeneous ozone catalyst 14 is added to the bottom of the mixed oxidation tank 1.

[0022] It should be noted that during use, external sewage is introduced into the system through sewage pipe 5 and mixed with the return water drawn from the lower part of the other side of the mixed oxidation tank 1 through pumping pipe 4 before sewage pump 3. After being pressurized by the pump, it is sent to Venturi tube microbubble generator 6 through water supply pipe 19. It is then efficiently mixed with ozone supplied by ozone generator 8 through gas supply pipe 9 to form dissolved air water rich in microbubbles. This dissolved air water returns to the bottom of mixed oxidation tank 1 through connecting pipe 7, impacting and driving the granular heterogeneous ozone catalyst 14 added to the bottom of the tank to form a fluidized state. The gas-liquid-solid three-phase mixture rises in a serpentine manner under the guidance of the staggered inclined guide plates 18. After sufficient reaction, the treated water is filtered through the filter screen 17 of the upper outlet pipe 10 and discharged.

[0023] refer to Figure 2 The backwashing mechanism is connected to the outlet pipe 10. The backwashing mechanism includes a water pump 11, an external pipe 13, a backwash pipe 12, and an electrically controlled valve 15. The water pump 11 is installed on one side of the mixed oxidation tank 1. The inlet of the water pump 11 is fixedly connected to the external pipe 13. The outlet of the water pump 11 is fixedly connected to the outlet pipe 10 through the backwash pipe 12. The electrically controlled valve 15 is installed on the end of the outlet pipe 10 away from the mixed oxidation tank 1. The backwashing mechanism also includes a timer controller 16. The timer controller 16 is installed on one side of the mixed oxidation tank 1. The water pump 11 and the electrically controlled valve 15 are both electrically connected to the timer controller 16. The other end of the external pipe 13 is fixedly connected to an external water supply pipe.

[0024] It should be noted that when the device is performing ozone catalytic oxidation treatment normally, the electrically controlled valve 15 on the outlet pipe 10 is in the open state, and the treated clean water can be discharged normally. At this time, the backwashing mechanism is not working. After running for a period of time, when the filter screen 17 forms a filter cake due to the interception of catalyst particles, resulting in increased water outlet resistance, the timer controller 16 automatically starts the backwashing cycle according to the preset program. The timer controller 16 first issues a command to close the electrically controlled valve 15 on the outlet pipe 10, blocking the water outlet channel. Subsequently, the timer controller 16 starts the water pump 11, which cleans the water from the outside through the external pipe 13. Clean water source is used to extract high-pressure clean water and pump it into the outlet pipe 10 through the backwash pipe 12. The high-pressure clean water forms a reverse water flow in the outlet pipe 10, flowing from the outside to the inside, against the normal water flow direction, and washes the catalyst filter cake attached to the filter screen 17 at high speed. The powerful reverse water flow peels the catalyst particles off the surface of the filter screen 17, so that they are resuspended in the water in the mixed oxidation tank 1 and return to the reaction zone to participate in the circulation. After a preset short backwash duration, the timer controller 16 sequentially shuts off the water pump 11 and reopens the electric control valve 15, and the device then resumes the normal ozone catalytic oxidation treatment process.

[0025] refer to Figure 1 and Figure 2 The outlet pipe 10 and the sewage pipe 5 are both fixedly connected to one end with matching flanges, which facilitates the connection of the pipes.

[0026] refer to Figure 1 The front end of the mixed oxidation tank 1 is fixedly connected to a cleaning pipe 2, and one end of the cleaning pipe 2 is threadedly connected to a matching cover. The cleaning pipe 2 facilitates cleaning.

[0027] The working principle of this utility model is as follows: During use, external sewage enters the system through sewage pipe 5 and mixes with the return water drawn from the lower part of the other side of the mixed oxidation tank 1 through pumping pipe 4 before sewage pump 3. After being pressurized by the pump, it is sent to Venturi tube microbubble generator 6 through water delivery pipe 19, where it is efficiently mixed with ozone supplied by ozone generator 8 through gas delivery pipe 9 to form dissolved air water rich in microbubbles. This dissolved air water returns to the bottom of mixed oxidation tank 1 through connecting pipe 7, impacting and driving the granular heterogeneous ozone catalyst 14 added to the bottom of the tank to form a fluidized state. The gas-liquid-solid three-phase mixture rises in a serpentine manner under the guidance of the staggered inclined guide plates 18, fully reacting. Afterwards, the treated water is filtered through the filter screen 17 of the upper outlet pipe 10 and then discharged. During normal ozone catalytic oxidation treatment, the electrically controlled valve 15 on the outlet pipe 10 is open, allowing the treated water to be discharged normally. At this time, the backwashing mechanism is not working. After a period of operation, a filter cake forms on the surface of the filter screen 17 due to the trapping of catalyst particles, causing an increase in water outlet resistance. The timer controller 16 then automatically starts the backwashing cycle according to a preset program. The timer controller 16 first issues a command to close the electrically controlled valve 15 on the outlet pipe 10, blocking the water outlet channel. Subsequently, the timer controller 16 starts the water pump 11, which pumps water from the outside through the external pipe 13. A clean water source is used to extract high-pressure clean water, which is then pumped into the outlet pipe 10 through the backwash pipe 12. The high-pressure clean water forms a reverse flow within the outlet pipe 10, flowing from the outside in, against the normal outflow direction, and rapidly washing away the catalyst filter cake adhering to the filter screen 17. The powerful reverse flow strips the catalyst particles from the surface of the filter screen 17, causing them to resuspend in the water within the mixed oxidation tank 1 and return to the reaction zone to participate in the circulation. After a preset short backwash duration, the timer controller 16 sequentially shuts off the water pump 11 and reopens the electronic control valve 15, and the device immediately resumes the normal ozone catalytic oxidation treatment process. In summary, this device utilizes a venturi tube... The microbubble generator 6 produces microbubbles, which, combined with the fluidized heterogeneous ozone catalyst 14, significantly improve the ozone dissolution efficiency and mass transfer rate. Furthermore, the use of granular heterogeneous ozone catalyst 14 circulating fluidized within the mixed oxidation tank 1 fundamentally overcomes the technical difficulties of clogging and deactivation inherent in traditional fixed-bed catalysts. Catalyst replenishment and replacement are convenient. Moreover, the staggered inclined guide plates 18 guide the flow in a serpentine pattern, eliminating short-circuiting and dead zones, ensuring full utilization of the reactor volume. Finally, the filter screen 17, in conjunction with the backwashing mechanism, effectively prevents catalyst loss and enables continuous automated operation of the unit. The entire system boasts comprehensive advantages such as high ozone utilization, long maintenance cycles, stable operation, and low cost.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-efficiency dissolved gas device for ozone catalytic oxidation, characterized in that, include: A mixed oxidation tank (1) is fixedly connected to an outlet pipe (10) on the upper part of one side of the mixed oxidation tank (1), and a matching filter screen (17) is fixedly connected to the end of the outlet pipe (10) near the mixed oxidation tank (1). A dissolved air mechanism is connected to one side of the mixed oxidation tank (1). The dissolved air mechanism includes a sewage pump (3), a pumping pipe (4), a sewage pipe (5), a water supply pipe (19), a Venturi tube microbubble generator (6), a connecting pipe (7), an ozone generator (8), and a gas supply pipe (9). A sewage pump (3) is installed on one side of the mixed oxidation tank (1). The inlet of the sewage pump (3) is fixedly connected to the pumping pipe (4) and the sewage pipe (5) through a three-way pipe joint. The pumping pipe (4) is connected to the mixed oxidation tank (1). The lower part of the other side of the mixed oxidation tank (1) is fixedly connected. The outlet of the sewage pump (3) is fixedly connected to the Venturi tube microbubble generator (6) through the water supply pipe (19). The outlet of the Venturi tube microbubble generator (6) is fixedly connected to the side of the mixed oxidation tank (1) through the connecting pipe (7). An ozone generator (8) is also installed on one side of the mixed oxidation tank (1). The outlet of the ozone generator (8) is fixedly connected to the inlet of the Venturi tube microbubble generator (6) through the gas supply pipe (9). Inclined guide plates (18): Multiple parallel inclined guide plates (18) are fixedly connected to both inner sidewalls of the mixed oxidation tank (1); A backwashing mechanism is connected to the outlet pipe (10).

2. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 1, characterized in that, The backwashing mechanism includes a water pump (11), an external pipe (13), a backwash pipe (12), and an electric control valve (15). A water pump (11) is installed on one side of the mixed oxidation tank (1). The inlet of the water pump (11) is fixedly connected to the external pipe (13). The outlet of the water pump (11) is fixedly connected to the outlet pipe (10) through the backwash pipe (12). An electric control valve (15) is installed on the end of the outlet pipe (10) away from the mixed oxidation tank (1).

3. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 2, characterized in that, The backwashing mechanism also includes a timer controller (16). The timer controller (16) is installed on one side of the mixed oxidation tank (1). The water pump (11) and the electric control valve (15) are both electrically connected to the timer controller (16).

4. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 2, characterized in that, The other end of the external pipe (13) is fixedly connected to the external water supply pipe.

5. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 1, characterized in that, Both the outlet pipe (10) and the sewage pipe (5) are fixedly connected to one end with matching flanges.

6. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 1, characterized in that, The bottom of the mixed oxidation tank (1) is filled with granular heterogeneous ozone catalyst (14).

7. The high-efficiency dissolved gas device for ozone catalytic oxidation according to claim 1, characterized in that, The front end of the mixed oxidation tank (1) is fixedly connected to a cleaning pipe (2), and one end of the cleaning pipe (2) is threadedly connected to a matching cover.

Images