Integrated catalytic ozonation equipment

Abstract

The integrated catalytic ozonation equipment comprises a tank body, a water-gas premixing area is arranged at the bottom in the tank body, a bottom valve, an ozone inlet pipe and a raw sewage inlet pipe are arranged in the water-gas premixing area, a water distribution plate is arranged above the water-gas premixing area, the water distribution plate is provided with water passing holes, a catalytic oxidation reaction filler area is arranged above the water distribution plate, and the raw sewage inlet pipe is arranged in the catalytic oxidation reaction filler area. A water outlet is formed in the tank wall above the catalytic oxidation reaction filler area, the water outlet is connected with a treated sewage outlet pipe, a top manhole is formed in the top of the tank body, a tail gas pipe and an ozone inlet pipe extend into the water-gas premixing area, a gas nozzle faces downwards, the catalytic oxidation reaction filler area and the water-gas premixing area are communicated with an inner reflux pipe, and an inner reflux pump is arranged on the inner reflux pipe; and the outlet of the inner return pipe in the water-gas premixing area corresponds to a gas nozzle of the ozone inlet pipe and sprays ozone from the gas nozzle. The device has the beneficial effects that the ozone diffusivity is better than the original ozone diffusivity and the ozone utilization rate is higher. The equipment is smaller in occupied area and low in later maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment equipment, and relates to ozone catalytic oxidation equipment. Background Technology

[0002] Ozone has a strong ability to remove various pollutants comprehensively without producing secondary pollution, and is widely used in various wastewater treatment fields. However, traditional ozone catalytic oxidation, for small-volume wastewater treatment plants, suffers from problems such as large footprint and high maintenance costs. Integrated ozone catalytic oxidation equipment solves a series of problems such as limited building area and high maintenance costs. In the bottom water-air premixing zone of the ozone catalytic oxidation equipment, ozone and the wastewater to be treated are mixed. Due to the poor diffusion of water and gas, the ozone concentration near the ozone outlet is higher than that further away. Therefore, this technical problem needs to be solved. Utility Model Content

[0003] This invention proposes an integrated ozone catalytic oxidation device to improve the diffusion of ozone.

[0004] The technical solution of this utility model is as follows: An integrated ozone catalytic oxidation device includes a tank. The bottom of the tank is a water-air premixing zone, which is equipped with a bottom valve, an ozone inlet pipe, and a raw wastewater inlet pipe. Above the water-air premixing zone is a water distribution plate with water passage holes. Above the water distribution plate is a catalytic oxidation reaction packing zone. Above the catalytic oxidation reaction packing zone, the tank wall is equipped with a water outlet connected to the treated wastewater outlet pipe. The top of the tank is equipped with a top manhole and a tail gas pipe. The ozone inlet pipe extends into the water-air premixing zone with the nozzle facing downwards. The catalytic oxidation reaction packing zone is connected to the water-air premixing zone by an internal return pipe. An internal return pump is installed on the internal return pipe. The outlet of the internal return pipe in the water-air premixing zone corresponds to the nozzle of the ozone inlet pipe, which sprays the ozone out of the nozzle.

[0005] The catalytic oxidation reaction packing area tank wall is equipped with a maintenance manhole.

[0006] Furthermore, the wastewater outlet pipe is connected to a branch backwash water pipe, and the bottom valve works in conjunction with the backwash water pipe. When the wastewater outlet pipe valve body, ozone inlet pipe, internal return pump, and raw wastewater inlet pipe are all closed, the catalytic oxidation reaction packing area is flushed through the bottom valve and backwash water pipe.

[0007] Furthermore, a cover is provided at the connection between the inner reflux pipe and the catalytic oxidation reaction packing zone. The cover has mesh holes with a diameter smaller than the packing particle size.

[0008] The advantages of this invention are: better ozone diffusion and higher ozone utilization rate; smaller footprint and lower maintenance costs. Attached Figure Description

[0009] Figure 1A schematic diagram of this utility model;

[0010] exist Figure 1 In the diagram, number 1 is the water distribution plate; number 2 is the catalytic oxidation reaction packing area; number 3 is the water-air premixing area; number 4 is the top manhole; number 5 is the maintenance manhole; number 6 is the ozone inlet pipe; number 7 is the raw sewage inlet pipe; number 8 is the internal return pipe; number 9 is the backwash water pipe; number 10 is the treated sewage outlet pipe; number 11 is the bottom valve; number 12 is the tail gas pipe; number 13 is the internal return pump; and number 14 is the enclosure. Detailed Implementation

[0011] This integrated ozone catalytic oxidation equipment includes a tank. At the bottom of the tank is a water-air premixing zone 3, which is equipped with a bottom valve 11, an ozone inlet pipe 6, and a raw wastewater inlet pipe 7. Above the water-air premixing zone 3 is a water distribution plate 1 with water passage holes. Above the water distribution plate 1 is the catalytic oxidation reaction packing zone 2, and above the catalytic oxidation reaction packing zone 2, the tank wall has an outlet. The outlet connects to the treated wastewater outlet pipe 10. The top of the tank has a top manhole 4 and a tail gas pipe 12. Ozone inlet pipe 6 extends into water-air premixing zone 3 with its nozzle facing downwards. Catalytic oxidation reaction packing zone 2 is connected to water-air premixing zone 3 by an internal return pipe 8. An internal return pump 13 is installed on the internal return pipe 8. The outlet of the internal return pipe 8 in water-air premixing zone 3 corresponds to the nozzle of the ozone inlet pipe 6. When the ozone exiting the nozzle is sprayed by the liquid at the outlet of the internal return pipe 8, it is propelled away from the nozzle, improving ozone dispersion and allowing for better mixing with the raw wastewater. A maintenance manhole 5 is provided on the wall of the catalytic oxidation reaction packing zone 2.

[0012] The wastewater outlet pipe 10 is connected to a branch backwash water pipe 9. The bottom valve 11 works in conjunction with the backwash water pipe 9. When the valve body of the wastewater outlet pipe 10, the ozone inlet pipe 6, the internal return pump 13, and the raw wastewater inlet pipe 7 are all closed, the catalytic oxidation reaction packing area 2 is flushed through the bottom valve 11 and the backwash water pipe 9.

[0013] A cover box 14 is provided at the connection between the inner reflux pipe 8 and the catalytic oxidation reaction packing zone 2. The cover box 14 has mesh holes with a diameter smaller than the packing particle size, so as to prevent the packing from being sucked into the inner reflux pipe 8.

[0014] Usage: 1. Bottom valve 11 and backwash water pipe 9 are normally closed. Ozone and raw sewage enter the water-air premixing zone 3 separately. After premixing, they are evenly introduced into the catalytic oxidation reaction packing zone 2 through the water distribution plate 1. The packing catalyzes the reaction between ozone and toxic and harmful substances in the sewage.

[0015] 2. When the liquid level in the tank reaches the internal reflux level, start the internal reflux pump 13 to return part of the liquid to the water-air premixing zone 3. This not only improves the reuse rate of undecomposed ozone but also increases the hydraulic residence time. The internal reflux flow rate can be adjusted according to the hydraulic residence time, outlet indicators, etc.

[0016] 3. When the liquid level reaches the outlet, open the treated wastewater outlet pipe 10 to discharge the treated wastewater to the next process.

[0017] Packing flushing: Close the valve body of the treated sewage outlet pipe 10, stop the ozone inlet pipe 6, close the internal return pump 13, and stop the water intake of the raw sewage inlet pipe 7. Open the bottom valve 11 and the backwash water pipe 9 valves to connect the flushing water. Let the flushing water enter from the bottom valve 11 and exit from the backwash water pipe 9. After flushing for a period of time, water will enter from the backwash water pipe 9 and exit from the bottom valve 11 until the water is clear and then the backwashing ends.

Claims

1. An integrated ozone catalytic oxidation device, comprising a tank, with a water-air premixing zone (3) at the bottom of the tank, a bottom valve (11), an ozone inlet pipe (6), and a raw wastewater inlet pipe (7) provided in the water-air premixing zone (3), a water distribution plate (1) above the water-air premixing zone (3), the water distribution plate (1) having water passage holes, a catalytic oxidation reaction packing zone (2) above the water distribution plate (1), a water outlet on the tank wall above the catalytic oxidation reaction packing zone (2), the water outlet being connected to the treated wastewater outlet pipe (10), and a top manhole (4) and a tail gas pipe (12) at the top of the tank, characterized in that: The ozone inlet pipe (6) extends into the water-air premixing zone (3) with the nozzle facing downwards. The catalytic oxidation reaction packing zone (2) is connected to the water-air premixing zone (3) via an internal return pipe (8). An internal return pump (13) is installed on the internal return pipe (8). The outlet of the internal return pipe (8) corresponds to the nozzle of the ozone inlet pipe (6) at the outlet of the water-air premixing zone (3), and sprays the ozone coming out of the nozzle.

2. The integrated ozone catalytic oxidation device according to claim 1, characterized in that: The catalytic oxidation reaction packing area (2) has a maintenance manhole (5) on the tank wall.

3. The integrated ozone catalytic oxidation device according to claim 1, characterized in that: The wastewater outlet pipe (10) is connected to a branch backwash water pipe (9). The bottom valve (11) works in conjunction with the backwash water pipe (9). When the valve body of the wastewater outlet pipe (10), the ozone inlet pipe (6), the internal return pump (13), and the raw wastewater inlet pipe (7) are all closed, the catalytic oxidation reaction packing area (2) is flushed through the bottom valve (11) and the backwash water pipe (9).

4. The integrated ozone catalytic oxidation device according to claim 1, characterized in that: A cover (14) is provided at the connection between the inner reflux pipe (8) and the catalytic oxidation reaction packing zone (2). The cover (14) has mesh holes, and the hole diameter is smaller than the packing particle size.

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