A multi-stage catalytic oxidation reactor for dispersing dye wastewater

Abstract

The utility model relates to wastewater treatment field discloses a multistage catalytic oxidation reactor of disperse dye wastewater, including third reaction jar, the top fixedly connected with second reaction jar of third reaction jar, the top fixedly connected with first reaction jar of second reaction jar, the top fixedly connected with motor of first reaction jar, the outer wall of first reaction jar is provided with liquid inlet pipe, the outer wall of third reaction tube is provided with liquid outlet pipe. In the utility model, through the step -by -step processing design of three -stage reaction jar, the synergies of stirring, turbulence, catalysis and filtration are combined, and the progressive depth purification of wastewater is realized. The uniform water distribution of shunt frame, the three -dimensional stirring of stirring shaft and the multi -angle turbulence of air pipe greatly improve the contact efficiency and reaction sufficiency of wastewater and catalyst, cooperate the filtration link after each level processing, effectively remove the pollutants and reaction residue in wastewater, ensure that the final effluent quality is stable and reaches the standard.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a multi-stage catalytic oxidation reactor for disperse dye wastewater. Background Technology

[0002] Disperse dye wastewater is industrial wastewater generated in the textile printing and dyeing industry during the dyeing process using disperse dyes. Its composition is complex, containing a large amount of undyed dyes, auxiliaries, sizing agents, and fiber impurities. It is characterized by high color intensity, high organic matter concentration, and poor biodegradability. If it is discharged directly without effective treatment, it will cause serious pollution to the aquatic ecological environment and waste water resources.

[0003] In existing technologies, various processes such as physical, chemical, and biological methods are commonly used to treat disperse dye wastewater. Among them, catalytic oxidation technology is widely used because it can effectively degrade recalcitrant organic matter. Typically, wastewater is introduced into a reaction vessel, and an oxidation reaction occurs under certain temperature and pressure conditions by adding a catalyst and an oxidant, decomposing the organic pollutants in the wastewater into harmless or easily treatable substances.

[0004] Existing technologies have the following drawbacks: Most methods for agitating disperse dye wastewater employ single-dimensional rotary stirring, where the water is stirred by the horizontal rotation of the agitator. This method only creates horizontal water circulation and fails to achieve a vertically integrated three-dimensional mixing effect within the reaction vessel. When significant concentration stratification or uneven catalyst distribution exists within the reaction tank, single-dimensional rotary stirring cannot effectively break up this stratification, resulting in insufficient contact between the wastewater and the catalyst / oxidant in certain areas. Therefore, a multi-stage catalytic oxidation reactor for disperse dye wastewater is proposed to address these issues. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a multi-stage catalytic oxidation reactor for disperse dye wastewater, aiming to improve the problem of the single stirring method in the existing technology.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-stage catalytic oxidation reactor for disperse dye wastewater, comprising a third reaction tank, a second reaction tank fixedly connected to the top of the third reaction tank, a first reaction tank fixedly connected to the top of the second reaction tank, a motor fixedly connected to the top of the first reaction tank, an inlet pipe provided on the outer wall of the first reaction tank, an outlet pipe provided on the outer wall of the third reaction tank, a fixed shaft fixedly connected to the output end of the motor, a stirring shaft slidably connected to the outer wall of the fixed shaft, a flow divider frame and a catalytic frame rotatably connected to the outer wall of the fixed shaft, a squeezing rod fixedly connected to the bottom end of the stirring shaft, a fixed block fixedly connected to the inner wall of the bottom end of the first reaction tank, a turbulence mechanism provided on the inner wall of the first reaction tank, and an output pipe fixedly connected to the outer walls of the third reaction tank, the second reaction tank, and the first reaction tank, with multiple sets of output pipes, and U-shaped pipes fixedly connected between the multiple sets of output pipes, with a filtration mechanism provided at the lower end of the U-shaped pipe; The turbulence-inducing mechanism includes an air pipe, which is disposed on the inner wall of the first reaction vessel, and an air inlet valve is disposed at the left end of the air pipe.

[0007] As a further description of the above technical solution: The filtration mechanism includes a connecting frame, which is fixedly connected to the lower end of the U-shaped tube. A filter frame is inserted into the inner wall of the connecting frame, and a sealing plate is fixedly connected to the top of the filter frame. The sealing plate is threadedly connected to the connecting frame by fastening bolts.

[0008] As a further description of the above technical solution: The sealing plate is attached to the top of the connecting frame.

[0009] As a further description of the above technical solution: Both the flow divider and the catalyst frame are fixedly connected to the inner wall of the first reaction vessel.

[0010] As a further description of the above technical solution: The fixed shafts pass through and are rotatably connected to the inner walls of the first reaction vessel, the second reaction vessel, and the third reaction vessel, respectively.

[0011] As a further description of the above technical solution: The bottom end of the extrusion rod is in contact with the surface of the fixing block.

[0012] As a further description of the above technical solution: The surface of the diversion frame has a circular hole.

[0013] As a further description of the above technical solution: The circular holes are provided in multiple sets, and the multiple sets of circular holes are evenly distributed on the surface of the diversion frame.

[0014] This utility model has the following beneficial effects: 1. In this utility model, a stepped treatment design of a three-stage reaction tank, combined with the synergistic effects of stirring, turbulence, catalysis, and filtration, achieves progressive deep purification of wastewater. The uniform water distribution of the diversion frame, the three-dimensional stirring of the stirring shaft, and the multi-angle turbulence of the gas pipe significantly improve the contact efficiency and reaction sufficiency between wastewater and catalyst. Combined with the filtration stage after each treatment, pollutants and reaction residues in the wastewater are effectively removed, ensuring that the final effluent quality consistently meets standards.

[0015] In this invention, wastewater is filtered through a filter screen. The detachable filter frame design allows for quick assembly and disassembly using fastening bolts, facilitating regular cleaning or replacement of the filter screen and effectively preventing impurities from clogging the system and affecting treatment efficiency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a multi-stage catalytic oxidation reactor for disperse dye wastewater proposed in this utility model; Figure 2 This is a cross-sectional schematic diagram of the first and second reaction tanks of a multi-stage catalytic oxidation reactor for disperse dye wastewater proposed in this utility model; Figure 3 This is a schematic diagram showing the flow divider and catalyst frame of a multi-stage catalytic oxidation reactor for disperse dye wastewater proposed in this utility model. Figure 4 This is a schematic diagram showing the extrusion rod and fixing block of a multi-stage catalytic oxidation reactor for disperse dye wastewater proposed in this utility model. Figure 5 This is an exploded view of the filter frame and connecting frame of a multi-stage catalytic oxidation reactor for disperse dye wastewater proposed in this utility model.

[0017] Legend: 1. Third reaction vessel; 2. Second reaction vessel; 3. First reaction vessel; 4. Motor; 5. Inlet pipe; 6. Outlet pipe; 7. Diverter frame; 8. Catalytic frame; 9. Gas pipe; 10. Inlet valve; 11. Stirring shaft; 12. Fixing block; 13. Extrusion rod; 14. Output pipe; 15. U-shaped pipe; 16. Connecting frame; 17. Filter frame; 18. Sealing plate; 19. Fastening bolts; 20. Fixing shaft. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figures 1-3 This utility model provides an embodiment of a multi-stage catalytic oxidation reactor for disperse dye wastewater, comprising a third reaction tank 1, a second reaction tank 2 fixedly connected to the top of the third reaction tank 1, and a first reaction tank 3 fixedly connected to the top of the second reaction tank 2. The third reaction tank 1, the second reaction tank 2, and the first reaction tank 3 constitute the entire oxidation reactor, forming a multi-stage wastewater treatment process. A motor 4 is fixedly connected to the top of the first reaction tank 3. An inlet pipe 5 is provided on the outer wall of the first reaction tank 3, which is connected to an external wastewater pipeline, allowing wastewater to enter the first reaction tank 3 through the external pipeline and the inlet pipe 5. An outlet pipe 6 is provided on the outer wall of the third reaction tank 1, which is connected to an external pipeline, allowing the treated wastewater to be discharged through the outlet pipe 6. A fixed shaft 20 is fixedly connected to the output end of the motor 4, and a stirring shaft 11 is slidably connected to the outer wall of the fixed shaft 20. The outer wall of the fixed shaft 20 has protrusions, which can rotate the stirring shaft 11 and allow the stirring shaft 11 to rotate. Shaft 11 moves vertically along the outer wall of fixed shaft 20. The outer wall of fixed shaft 20 is rotatably connected to diversion frame 7 and catalyst frame 8. Diversion frame 7 has multiple holes, which allow wastewater to flow in from different holes, making the water flow more evenly to the catalyst frame 8 below. Catalyst frame 8 is mainly used to support catalyst. Extrusion rod 13 is fixedly connected to the bottom end of stirring shaft 11. Fixed block 12 is fixedly connected to the inner wall of the bottom end of first reaction tank 3. The two sides of fixed block 12 are inclined, which allows extrusion rod 13 to contact fixed block 12 along the inclined surface. The inner wall of first reaction tank 3 is provided with a turbulence mechanism. Output pipe 14 is fixedly connected to the outer walls of third reaction tank 1, second reaction tank 2 and first reaction tank 3. Output pipe 14 allows wastewater to flow through U-shaped pipe 15 to other reaction tanks in a stepwise manner. Multiple sets of output pipe 14 are provided. U-shaped pipe 15 is fixedly connected between multiple sets of output pipe 14. U-shaped pipe 15 is mainly used to transport wastewater. Filter mechanism is provided at the lower end of U-shaped pipe 15.

[0020] The turbulence-inducing mechanism includes an air pipe 9, which is annular and has an extension tube on its surface, allowing gas to be discharged from the extension tube and turbulence-inducing at multiple angles. The air pipe 9 has multiple slots, and a filter screen is installed in the slots to prevent impurities from entering the air pipe 9. The air pipe 9 is located on the inner wall of the first reaction vessel 3. An air inlet valve 10 is provided at the left end of the air pipe 9. The air inlet valve 10 is connected to an external air pump. When needed, the air pump can be turned on to allow gas to enter the air pipe 9 through the air inlet valve 10.

[0021] Reference Figure 1 and Figure 5 The filtration mechanism includes a connecting frame 16, which is fixedly connected to the lower end of the U-shaped tube 15. A filter frame 17 is inserted into the inner wall of the connecting frame 16. A filter screen is provided on the filter frame 17, which can filter impurities in the wastewater. A sealing plate 18 is fixedly connected to the top of the filter frame 17. The bottom of the sealing plate 18 is made of rubber material, which can fit tightly against the insertion point of the filter frame 17 and the connecting frame 16. The sealing plate 18 is threadedly connected to the connecting frame 16 by fastening bolts 19, and the sealing plate 18 fits against the top of the connecting frame 16.

[0022] Reference Figures 2-4 The diversion frame 7 and the catalyst frame 8 are both fixedly connected to the inner wall of the first reaction tank 3. The fixed shaft 20 passes through and is rotatably connected to the inner walls of the first reaction tank 3, the second reaction tank 2 and the third reaction tank 1 respectively. The fixed shaft 20 passes through the first reaction tank 3, the second reaction tank 2 and the third reaction tank 1. Existing sealing technology is used at the point where the fixed shaft 20 passes through the first reaction tank 3, the second reaction tank 2 and the third reaction tank 1, so there is no risk of leakage. The bottom end of the extrusion rod 13 is in contact with the surface of the fixed block 12. The surface of the diversion frame 7 is provided with round holes. There are multiple sets of round holes, and the multiple sets of round holes are evenly distributed on the surface of the diversion frame 7.

[0023] Working Principle: Firstly, when wastewater needs treatment, it is transported to the first reaction tank 3. Uniform distribution of the wastewater through evenly distributed circular holes on the diversion frame 7 ensures even distribution, allowing the wastewater to be more evenly distributed onto the catalyst frame 8 below. The catalyst in the catalyst frame 8 comes into full contact with the wastewater, initiating a preliminary catalytic oxidation reaction. Simultaneously, the motor 4 drives the fixed shaft 20 to rotate. The fixed shaft 20, through protrusions on its outer wall, drives the stirring shaft 11 to rotate synchronously. As the stirring shaft 11 rotates, the extrusion rod 13 at its bottom slides along the inclined surface of the fixed block 12, generating vertical movement during rotation. This achieves thorough stirring of the wastewater in the first reaction tank 3, enhancing the contact efficiency between the wastewater and the catalyst. Simultaneously, an external air pump is activated, and gas is discharged at multiple angles through the air pipe 9 and its extended pipes, creating turbulence for the wastewater. To further enhance the reaction effect, the wastewater treated by the first reaction tank 3 flows into the U-shaped pipe 15 through the output pipe 14. In the filtration mechanism at the lower end of the U-shaped pipe 15, the filter frame 17 in the connecting frame 16 filters the impurities in the wastewater through the filter screen. The filtered wastewater is then transported to the second reaction tank 2 through the U-shaped pipe 15. In the second reaction tank 2, the fixed shaft 20 continues to drive the stirring shaft 11 to stir. At the same time, the catalyst in the catalytic frame 8 performs a second catalytic oxidation treatment on the wastewater. The treated wastewater also enters the third reaction tank 1 through the output pipe 14, the U-shaped pipe 15, and the filtration mechanism for a third catalytic oxidation reaction. Through the step-by-step treatment of the three-stage reaction tanks, combined with the multiple effects of stirring, turbulence, catalysis, and filtration, the efficient purification treatment of disperse dye wastewater is achieved.

[0024] When the filter frame 17 needs to be replaced and cleaned, simply twist the fastening bolt 19 to separate the fastening bolt 19 from the top threaded hole of the connecting frame 16. The installation steps are the same, ensuring the smooth flow of subsequent wastewater.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage catalytic oxidation reactor for disperse dye wastewater, comprising a third reaction tank (1), characterized in that: The top of the third reaction vessel (1) is fixedly connected to the second reaction vessel (2), the top of the second reaction vessel (2) is fixedly connected to the first reaction vessel (3), the top of the first reaction vessel (3) is fixedly connected to the motor (4), the outer wall of the first reaction vessel (3) is provided with an inlet pipe (5), the outer wall of the third reaction vessel (1) is provided with an outlet pipe (6), the output end of the motor (4) is fixedly connected to a fixed shaft (20), the outer wall of the fixed shaft (20) is slidably connected to a stirring shaft (11), and the outer wall of the fixed shaft (20) is rotatably connected to a distribution shaft. The flow frame (7) and the catalyst frame (8) are connected. The bottom end of the stirring shaft (11) is fixedly connected to the extrusion rod (13). The bottom inner wall of the first reaction tank (3) is fixedly connected to the fixing block (12). The inner wall of the first reaction tank (3) is provided with a turbulence mechanism. The outer walls of the third reaction tank (1), the second reaction tank (2) and the first reaction tank (3) are all fixedly connected to the output pipes (14). The output pipes (14) are provided in multiple sets. The multiple sets of output pipes (14) are fixedly connected to the U-shaped pipes (15). The lower end of the U-shaped pipes (15) is provided with a filter mechanism. The turbulence mechanism includes an air pipe (9), which is located on the inner wall of the first reaction vessel (3), and an air inlet valve (10) is provided at the left end of the air pipe (9).

2. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 1, characterized in that: The filtering mechanism includes a connecting frame (16), which is fixedly connected to the lower end of the U-shaped tube (15). A filter frame (17) is inserted into the inner wall of the connecting frame (16), and a sealing plate (18) is fixedly connected to the top of the filter frame (17). The sealing plate (18) is threadedly connected to the connecting frame (16) by a fastening bolt (19).

3. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 2, characterized in that: The sealing plate (18) is attached to the top of the connecting frame (16).

4. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 1, characterized in that: The flow divider (7) and the catalyst (8) are both fixedly connected to the inner wall of the first reaction vessel (3).

5. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 1, characterized in that: The fixed shaft (20) passes through and is rotatably connected to the inner walls of the first reaction vessel (3), the second reaction vessel (2), and the third reaction vessel (1), respectively.

6. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 1, characterized in that: The bottom end of the extrusion rod (13) is in contact with the surface of the fixing block (12).

7. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 1, characterized in that: The surface of the diversion frame (7) has a circular hole.

8. The multi-stage catalytic oxidation reactor for disperse dye wastewater according to claim 7, characterized in that: The circular holes are provided in multiple sets, and the multiple sets of circular holes are evenly distributed on the surface of the diversion frame (7).

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