Catalytic ozonation wastewater treatment device based on powder catalyst

Abstract

The utility model discloses an ozone catalytic oxidation wastewater treatment device based on a powder catalyst. The ozone catalytic oxidation wastewater treatment device comprises an ozone catalytic reaction tower serving as a reaction area, a heterogeneous powder catalyst is adopted in the ozone catalytic reaction tower, a membrane separation unit is arranged at an outlet in the upper end, and a jet device is arranged on the side wall close to the bottom; the particle size of the powder catalyst is between 100 microns and 1000 microns, and the powder catalyst is uniformly distributed in the ozone catalytic reaction tower, is in full contact with wastewater and ozone in the ozone catalytic reaction tower and is intercepted in the ozone catalytic reaction tower by the membrane separation unit; and water discharged from the jet device is uniformly distributed in the ozone catalytic reaction tower and uniformly mixed with wastewater and ozone in the ozone catalytic reaction tower under the hydraulic stirring action of the water discharged from the jet device. According to the utility model, a small-particle-size powder type heterogeneous catalyst is adopted to replace a traditional large-particle heterogeneous catalyst, so that the catalytic treatment efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment construction technology, and in particular to an ozone catalytic oxidation wastewater treatment device based on powdered catalyst. Background Technology

[0002] Industrial wastewater is characterized by a wide variety of pollutants, high concentrations, high toxicity, complex composition, and poor biodegradability, making it one of the most difficult types of wastewater to treat.

[0003] One of the main sources of new pollutants is industrial wastewater. The implementation of the "Action Plan for the Treatment of New Pollutants" has placed higher demands on the treatment of industrial wastewater, including the subsequent advanced treatment of industrial wastewater that has been treated by conventional processes.

[0004] In existing technologies, the main methods for treating this type of wastewater include membrane filtration technology, ozone oxidation technology, photocatalytic oxidation technology, Fenton reagent oxidation technology, and conventional micro-electrolysis technology.

[0005] Ozone catalytic oxidation technology, as a type of ozone oxidation technology, has a wide range of applications in industrial wastewater treatment (especially advanced treatment).

[0006] Industrial wastewater has a relatively small volume of water that can be treated, and currently, catalytic oxidation towers are mainly used for treatment. Different catalysts can be filled into the tower. By utilizing the adsorption and catalytic effects of the catalysts, pollutants can be adsorbed and enriched on the surface of the catalyst. In addition, the catalysts can also promote the generation of hydroxyl radicals from ozone, thus more effectively treating some specific pollutants in industrial wastewater.

[0007] In practical applications, granular catalysts are often used to treat industrial wastewater using ozone catalytic oxidation processes. These catalysts typically have a diameter of 3-8 mm. Because they are solid particles, they are relatively heavy, and therefore are usually packed in fixed beds. Granular catalysts have large particles and low specific surface area, which significantly reduces efficiency. While fixed beds can intercept some particles, these intercepted particles can also clog the catalyst bed. Clogged catalyst beds can cause short-circuiting of the water flow, affecting the residence time of wastewater within the catalyst bed and thus impacting treatment effectiveness. This is especially true in high-salinity wastewater systems, where catalyst caking often occurs towards the end of the process, greatly affecting treatment efficiency. Furthermore, fixed-bed packing often requires air and water backwashing to prevent clogging, necessitating appropriate facilities and monitoring of clogging to adjust the backwashing cycle, making operation cumbersome.

[0008] Therefore, how to achieve efficient treatment of industrial wastewater, improve the catalytic efficiency of catalysts, and reduce the construction cost of wastewater treatment equipment has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0009] In view of the above-mentioned deficiencies of the prior art, this utility model provides an ozone catalytic oxidation wastewater treatment device based on powdered catalyst. The purpose is to use a device and process for ozone catalytic oxidation of wastewater with powdered catalyst to achieve efficient treatment of industrial wastewater, improve the catalytic efficiency of the catalyst, and reduce the construction cost of sewage treatment equipment.

[0010] To achieve the above objectives, this utility model discloses an ozone catalytic oxidation wastewater treatment device based on a powdered catalyst, including an ozone catalytic reaction tower as the reaction zone;

[0011] The ozone catalytic reaction tower uses a heterogeneous powder catalyst, has a membrane separation unit at the upper outlet, and an ejector on the side wall near the bottom.

[0012] The powdered catalyst has a particle size between 100µm and 1000µm and is uniformly distributed in the ozone catalytic reaction tower. It is in full contact with the wastewater and ozone in the ozone catalytic reaction tower and is retained in the ozone catalytic reaction tower by the membrane separation unit. It is uniformly distributed in the ozone catalytic reaction tower and uniformly mixed with the wastewater and ozone in the ozone catalytic reaction tower by the hydraulic stirring action of the water outlet of the jet.

[0013] Preferably, the side wall near the bottom of the ozone catalytic reaction tower is connected to a water inlet tank via a pipeline, and water is obtained from the water inlet tank;

[0014] A first water pump is installed on the pipeline between the ozone catalytic reaction tower and the water inlet tank.

[0015] Preferably, the upper outlet of the ozone catalytic reaction tower is connected to the water tank via a pipeline, and the water effluent from the membrane separation unit is input into the water tank;

[0016] A second water pump is installed on the pipeline between the ozone catalytic reaction tower and the water outlet tank.

[0017] More preferably, a third water pump and the jet injector are sequentially connected between the side wall of the water outlet tank near the bottom and the side wall of the ozone catalytic reaction tower near the bottom, forming an internal circulation through the third water pump and the jet injector.

[0018] Preferably, the ozone in the ozone catalytic reaction tower is generated by an ozone generator;

[0019] The ozone generator is connected to the ejector via a pipeline, and the generated ozone is fed into the ozone catalytic reaction tower through the ejector.

[0020] Preferably, the ozone catalytic reaction tower is provided with an exhaust port at the top, and the exhaust port is connected to the exhaust gas destruction device;

[0021] The exhaust gas destruction device is used to destroy unreacted ozone-containing gases.

[0022] The beneficial effects of this utility model are:

[0023] This invention utilizes a small-particle-size powdered heterogeneous catalyst to replace the traditional large-particle heterogeneous catalyst, resulting in higher catalytic treatment efficiency.

[0024] The powdered catalyst of this invention is uniformly distributed in the wastewater, so there will be no clogging or caking, ensuring stable operation. Moreover, because there is no clogging or caking, there is no need for air backwashing or water backwashing, requiring fewer auxiliary equipment, simplifying operation, reducing construction and operating costs, and achieving higher treatment efficiency.

[0025] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0026] Figure 1 A schematic diagram of an embodiment of the present invention is shown.

[0027] The components include: 1. Inlet tank; 2. Ozone catalytic reaction tower; 3. Outlet tank; 4. Tail crushing device; 5. Ozone generator; 6. First water pump; 7. Second water pump; 8. Third water pump; 9. Ejector; 10. Membrane separation unit; and 11. Powdered catalyst. Detailed Implementation

[0028] Example

[0029] like Figure 1 As shown, the ozone catalytic oxidation wastewater treatment device based on powdered catalyst includes an ozone catalytic reaction tower 2 as the reaction zone;

[0030] The ozone catalytic reaction tower 2 uses a heterogeneous powder catalyst 11, and a membrane separation unit 10 is provided at the upper outlet. An ejector 9 is provided on the side wall near the bottom.

[0031] The particle size of the powder catalyst 11 is between 100um and 1000um. It is uniformly distributed in the ozone catalytic reaction tower 2, and is in full contact with the wastewater and ozone in the ozone catalytic reaction tower 2. It is also retained in the ozone catalytic reaction tower 2 by the membrane separation unit 10. The uniform distribution in the ozone catalytic reaction tower 2 and the uniform mixing with the wastewater and ozone in the ozone catalytic reaction tower 2 are achieved by the hydraulic stirring action of the water outlet of the ejector 9.

[0032] The powder catalyst 11 of this invention has a particle size between 100um and 1000um, which is much smaller than the particle size of traditional large-particle catalysts (3mm to 8mm). It is evenly distributed in the ozone catalytic oxidation tower, making full contact with wastewater and ozone. Moreover, it is retained in the ozone catalytic reaction tower 2 by the membrane separation unit 10, ensuring that no loss occurs.

[0033] In some embodiments, the side wall of the ozone catalytic reaction tower 2 near the bottom is connected to the water inlet tank 1 via a pipeline to obtain water from the water inlet tank 1;

[0034] A first water pump 6 is installed on the pipeline between the ozone catalytic reaction tower 2 and the water inlet tank 1.

[0035] In some embodiments, the upper outlet of the ozone catalytic reaction tower 2 is connected to the water tank 3 via a pipeline, and the water effluent from the membrane separation unit 10 is input into the water tank 3.

[0036] A second water pump 7 is installed on the pipeline between the ozone catalytic reaction tower 2 and the outlet tank 3.

[0037] In practical applications, when the water in the outlet tank 3 reaches the treatment requirements, it is discharged and enters the subsequent treatment facilities.

[0038] In some embodiments, a third water pump 8 and an ejector 9 are sequentially connected between the side wall of the water outlet tank 3 near the bottom and the side wall of the ozone catalytic reaction tower 2 near the bottom, forming an internal circulation through the third water pump 8 and the ejector 9.

[0039] In some embodiments, the ozone in the ozone catalytic reaction tower 2 is generated by the ozone generator 5;

[0040] Ozone generator 5 is connected to ejector 9 through a pipeline, and the generated ozone is fed into ozone catalytic reaction tower 2 through ejector 9.

[0041] In some embodiments, the top of the ozone catalytic reaction tower 2 is provided with an exhaust port, which is connected to the exhaust gas destruction device 4;

[0042] The exhaust gas destruction device 4 is used to destroy unreacted ozone-containing gases.

[0043] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An ozone catalytic oxidation wastewater treatment device based on a powdered catalyst; characterized in that, Including the ozone catalytic reaction tower (2) which serves as the reaction zone; The ozone catalytic reaction tower (2) uses a heterogeneous powder catalyst (11), and a membrane separation unit (10) is provided at the upper outlet. An ejector (9) is provided on the side wall near the bottom. The powder catalyst (11) has a particle size between 100 μm and 1000 μm and is uniformly distributed in the ozone catalytic reaction tower (2). It is in full contact with the wastewater and ozone in the ozone catalytic reaction tower (2) and is retained in the ozone catalytic reaction tower (2) by the membrane separation unit (10). It is uniformly distributed in the ozone catalytic reaction tower (2) and uniformly mixed with the wastewater and ozone in the ozone catalytic reaction tower (2) by the hydraulic stirring action of the water outlet of the jet nozzle (9).

2. The ozone catalytic oxidation wastewater treatment device based on a powdered catalyst according to claim 1, characterized in that, The side wall near the bottom of the ozone catalytic reaction tower (2) is connected to the water inlet tank (1) through a pipeline, and water is obtained from the water inlet tank (1); A first water pump (6) is installed on the pipeline between the ozone catalytic reaction tower (2) and the water inlet tank (1).

3. The ozone catalytic oxidation wastewater treatment device based on a powdered catalyst according to claim 1, characterized in that, The upper outlet of the ozone catalytic reaction tower (2) is connected to the water tank (3) through a pipeline, and the water effluent from the membrane separation unit (10) is input into the water tank (3); A second water pump (7) is installed on the pipeline between the ozone catalytic reaction tower (2) and the water outlet tank (3).

4. The ozone catalytic oxidation wastewater treatment device based on a powdered catalyst according to claim 3, characterized in that, The side wall of the water outlet tank (3) near the bottom is provided with a third water pump (8) and the jet nozzle (9) connected in sequence between the side wall of the ozone catalytic reaction tower (2) near the bottom, and an internal circulation is formed through the third water pump (8) and the jet nozzle (9).

5. The ozone catalytic oxidation wastewater treatment device based on a powdered catalyst according to claim 1, characterized in that, The ozone in the ozone catalytic reaction tower (2) is generated by an ozone generator (5); The ozone generator (5) is connected to the ejector (9) through a pipeline, and the generated ozone is fed into the ozone catalytic reaction tower (2) through the ejector (9).

6. The ozone catalytic oxidation wastewater treatment device based on a powdered catalyst according to claim 1, characterized in that, The ozone catalytic reaction tower (2) is provided with an exhaust port at the top, and the exhaust port is connected to the tail gas destruction device (4); The exhaust gas destruction device (4) is used to destroy unreacted ozone-containing gas.

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