Coal chemical production wastewater treatment device

Abstract

The utility model belongs to the field of industrial sewage treatment, provide a kind of coal chemical production sewage treatment device, including shell, be provided with oxidizing agent mixing supplementary assembly in the shell, the oxidizing agent mixing supplementary assembly includes the main pipe rotationally arranged in shell, several groups of branch pipes are provided on the main pipe, the one end of the main pipe is connected with driving arrangement, the top of several groups of branch pipes on the main pipe is evenly provided with catalytic fixed bed, the lateral wall of shell and / or top is provided with several catalytic converters;The utility model is through the cooperation use of rotating spray of oxidizing agent mixing supplementary assembly and catalytic fixed bed, make hydrogen peroxide and sewage fully contact and produce a large number of hydroxyl radicals under the action of catalyst, can effectively degrade refractory organic matter in coal chemical sewage, can improve COD removal rate, simultaneously through the acceleration of microwave generator catalytic reaction rate, shorten the sewage treatment time, improve the processing efficiency, reduce the reaction condition and energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of industrial wastewater treatment, specifically a wastewater treatment device for coal chemical production. Background Technology

[0002] Wastewater generated during coal chemical production is complex in composition, containing high concentrations of organic matter, heavy metals, sulfides, and other harmful substances, posing a serious threat to the environment. If this wastewater is discharged directly without effective treatment, it will cause long-term and irreparable damage to water bodies and soil.

[0003] Traditional biological treatment methods, such as the activated sludge process, suffer from low treatment efficiency when treating coal chemical wastewater. This is because coal chemical wastewater contains large amounts of recalcitrant organic matter, such as polycyclic aromatic hydrocarbons (PAHs), which microorganisms have limited capacity to degrade, resulting in low COD removal rates and difficulty in meeting environmental emission standards. Chemical precipitation methods use chemical agents to precipitate heavy metals and other pollutants in wastewater, but their effectiveness in removing organic matter is limited, and they easily generate large amounts of chemical waste, potentially causing secondary pollution. Advanced oxidation technologies, such as the Fenton oxidation process, can effectively degrade recalcitrant organic matter in wastewater, but in practical applications, the excessively rapid decomposition rate of hydrogen peroxide in the Fenton process leads to low utilization and increased treatment costs. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the problems of low efficiency of traditional biological treatment methods, limited removal of organic matter and easy secondary pollution of chemical precipitation methods, and high cost due to excessively rapid decomposition of hydrogen peroxide in advanced oxidation technology. The present invention provides a coal chemical production wastewater treatment device with reasonable design, simple structure and good wastewater treatment effect.

[0005] The technical solution adopted to solve the above technical problems is: A wastewater treatment device for coal chemical production includes a shell, within which an oxidant mixing and replenishment assembly is installed. The oxidant mixing and replenishment assembly includes a main pipe rotatably disposed within the shell for replenishing oxidant. Several sets of branch pipes are vertically spaced on the main pipe. One end of the main pipe is connected to a driving device. A catalytic fixed bed is disposed above each set of branch pipes for fixing the catalyst. The catalytic fixed bed is fixedly connected to the inner wall of the shell and rotatably connected to the main pipe. Several catalysts are disposed on the side walls and / or top of the shell.

[0006] The outer shell of this utility model includes a bottom shell and a top cover. The bottom shell has a water inlet at its lower end and a water outlet at its upper end. The top cover has an exhaust port, which is connected to an external exhaust gas purification device.

[0007] The catalyst of this invention is a microwave generator, and it is covered with a protective shell.

[0008] The catalytic fixed bed of this invention includes a support plate and a interceptor plate fixedly disposed on a bottom shell, and a supported catalyst with copper and nickel as active components is filled between the support plate and the interceptor plate.

[0009] The drive device of this utility model includes a turbine installed at the top of the main pipe, a plurality of nozzles installed on the branch pipe, and a plurality of through holes installed on the lower side of the turbine on the main pipe.

[0010] The turbine of this invention is provided with a sealing assembly on its outer side. The sealing assembly includes a sealing cover provided on the upper cover. The sealing cover is sleeved on the outer side of the turbine. The top of the sealing cover is provided with a liquid inlet pipe, which is connected to an external hydrogen peroxide supply system.

[0011] 1. This utility model uses the rotating spray of the oxidant mixing and replenishing component and the catalytic fixed bed to make full contact between hydrogen peroxide and sewage and generate a large number of hydroxyl radicals under the action of the catalyst, which can effectively degrade the recalcitrant organic matter in coal chemical sewage and improve the COD removal rate.

[0012] 2. This utility model uses a catalyst fixed bed with a support plate and a interceptor plate to fix the catalyst, which avoids catalyst loss, extends the service life of the catalyst, and reduces operating costs.

[0013] 3. This utility model accelerates the catalytic reaction rate, shortens the sewage treatment time, and improves the treatment efficiency by using a microwave generator, while reducing reaction conditions and energy consumption. Attached Figure Description

[0014] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention; Figure 2 This is a second-view three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the third-view three-dimensional structure of this utility model.

[0015] In the diagram: 1. Outer shell; 101. Bottom shell; 102. Top cover; 2. Catalytic fixed bed; 201. Support plate; 202. Interceptor plate; 3. Oxidant mixing and replenishment assembly; 301. Main pipe; 302. Branch pipe; 303. Nozzle; 304. Turbine; 4. Catalyst; 5. Sealing assembly; 501. Sealing cover; 502. Liquid inlet pipe; 6. Water inlet; 7. Water outlet; 8. Exhaust port. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments. Example 1

[0017] exist Figures 1-3 The present invention relates to a wastewater treatment device for coal chemical production, comprising a shell 1, which serves as the main body and integrates an oxidant mixing and replenishment component 3, a catalytic fixed bed 2, and a microwave generator 4, forming a complete wastewater treatment system. The microwave generator 4 is located on the side wall and / or top of the shell 1 and is covered with a protective shell to provide microwave energy, accelerate the catalytic reaction process, and further improve the degradation efficiency of organic matter. The shell 1 consists of a bottom shell 101 and a top cover 102. The bottom shell 101 is a hollow rectangular structure with a closed bottom. An inlet 6 is provided at the lower end of the bottom shell 101, and an outlet 7 is provided at the upper end. The top cover 102 is provided with an exhaust port 8, which connects to an external exhaust gas purification device to realize the inflow and outflow of wastewater and the treatment of exhaust gas.

[0018] The oxidant mixing and replenishment assembly 3 includes a main pipe 301 mounted on the upper cover 102 via a mechanical seal. The main pipe 301 is rotatable relative to the upper cover 102. Several sets of branch pipes 302 are vertically spaced on the main pipe 301, and each set of branch pipes 302 is evenly distributed within a 360° horizontal phase. Several nozzles 303 are distributed on each branch pipe 302. One end of the main pipe 301 is connected to a drive device, which includes a turbine 304 fixed to the top of the main pipe 301. A sealing assembly 5 is provided on the outside of the turbine 304. A sealing cover 501 of the sealing assembly 5 is fitted over the outside of the turbine 304, and the liquid inlet pipe 502 at the top of the sealing cover 501 is connected to an external hydrogen peroxide supply system. Several through holes are provided on the lower side of the turbine 304 on the main pipe 301 for replenishing hydrogen peroxide. The external hydrogen peroxide supply system uses a plunger pump to pump hydrogen peroxide into the main pipe 301 through the inlet pipe 502 and the sealing cover 501. Then, it is evenly sprayed into the sewage through the nozzle 303 on the branch pipe 302. At the same time, the turbine 304 drives the main pipe 301 and the branch pipe 302 to rotate under the action of liquid flow, so that the hydrogen peroxide and sewage are fully mixed.

[0019] The catalytic fixed bed 2 of this invention is disposed above each set of branch pipes 302, including a support plate 201 and an interceptor plate 202 fixedly disposed on the inner wall of the bottom shell 101. A supported catalyst with copper-nickel as the active component is filled between the support plate 201 and the interceptor plate 202. This catalyst can effectively promote the decomposition of hydrogen peroxide to generate hydroxyl radicals, thereby improving wastewater treatment efficiency. Both the support plate 201 and the interceptor plate 202 adopt a porous filter plate design, are installed inside the bottom shell 101 via a support frame, and are rotatably connected to the main pipe 301.

[0020] The working principle of this utility model is as follows: Wastewater from coal chemical plants enters the bottom shell 101 through inlet 6. The external hydrogen peroxide supply system is activated, and hydrogen peroxide flows through inlet pipe 502 and sealing cover 501 into main pipe 301, then is sprayed into the wastewater through nozzles 303 on branch pipe 302. Turbine 304, driven by the liquid flow, rotates main pipe 301, ensuring thorough mixing of hydrogen peroxide and wastewater. Simultaneously, microwave generator 4 is activated, providing microwave energy. As the wastewater rises, it passes through catalytic fixed bed 2. Under the combined action of the catalyst and microwaves, hydrogen peroxide decomposes to generate hydroxyl radicals, degrading organic matter in the wastewater. The treated water is discharged through outlet 7. The exhaust gas generated during wastewater treatment enters an external exhaust gas purification device for further treatment through exhaust port 8.

Claims

1. A wastewater treatment device for coal chemical production, characterized in that: The device includes a housing (1), and an oxidant mixing and replenishing assembly (3) is provided inside the housing (1). The oxidant mixing and replenishing assembly (3) includes a main pipe (301) rotatably disposed inside the housing (1) for replenishing oxidant. Several sets of branch pipes (302) are vertically spaced on the main pipe (301). One end of the main pipe (301) is connected to a driving device. A catalyst fixing bed (2) is provided above each set of branch pipes (302) for fixing the catalyst. The catalyst fixing bed (2) is fixedly connected to the inner wall of the housing (1) and rotatably connected to the main pipe (301). Several catalysts (4) are provided on the side wall and / or top of the housing (1).

2. The wastewater treatment device for coal chemical production according to claim 1, characterized in that: The outer shell (1) includes a bottom shell (101) and a top cover (102). The bottom shell (101) has a water inlet (6) at its lower end and a water outlet (7) at its upper end. The top cover (102) has an exhaust port (8) which is connected to an external exhaust gas purification device.

3. The wastewater treatment device for coal chemical production according to claim 1, characterized in that: The catalyst (4) is a microwave generator and is covered with a protective shell.

4. The wastewater treatment device for coal chemical production according to claim 2, characterized in that: The catalytic fixed bed (2) includes a support plate (201) and a interceptor plate (202) fixedly disposed in the bottom shell (101). The support plate (201) and the interceptor plate (202) are porous filter plate structures. The space between the support plate (201) and the interceptor plate (202) is filled with a supported catalyst with copper and nickel as active components.

5. The wastewater treatment device for coal chemical production according to claim 4, characterized in that: The drive device includes a turbine (304) disposed on the top of the main pipe (301), a plurality of nozzles (303) disposed on the branch pipe (302), and a plurality of through holes disposed on the lower side of the turbine (304) on the main pipe (301).

6. The wastewater treatment device for coal chemical production according to claim 5, characterized in that: A sealing assembly (5) is provided on the outside of the turbine (304). The sealing assembly (5) includes a sealing cover (501) provided on the upper cover (102). The sealing cover (501) is sleeved on the outside of the turbine (304). An inlet pipe (502) is provided on the top of the sealing cover (501). The inlet pipe (502) is connected to an external hydrogen peroxide supply system.

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