Multistage treatment equipment for chemical wastewater

Abstract

The application discloses a chemical wastewater multistage treatment equipment, which comprises a sedimentation tank, a reaction cylinder and a filter box, the side end of the reaction cylinder is provided with a medicine storage cylinder, a rotating shaft is connected through the inside of the reaction cylinder, a driving assembly is arranged outside the rotating shaft, the driving assembly comprises a secondary gear, a support is connected to the secondary gear through a bearing, a first rotating rod coaxial with the secondary gear is fixed below the secondary gear, and a spiral part is arranged outside the first rotating rod. The chemical wastewater multistage treatment equipment has the advantages that the medicine in the medicine storage cylinder is conveyed into the reaction cylinder through a second pipeline, the medicine is conveniently reacted with wastewater, the problem of cost increase caused by the need of setting a redundant driving device is reduced, the overall structure is simple, the operation is convenient, the first rotating rod in the secondary gear drives the spiral part to rotate, the spiral part cooperates with a first stirring part to realize multidimensional mixing, the contact area of the medicine and the wastewater is enhanced, and the sufficiency of the chemical reaction is remarkably improved.

Description

Technical Field

[0001] This invention relates to the technical field of chemical wastewater treatment, specifically to a multi-stage chemical wastewater treatment device. Background Technology

[0002] Chemical enterprises generate a large amount of wastewater during the production process, making wastewater treatment a necessary production step. Wastewater treatment involves separating or transforming pollutants in wastewater through various methods to purify it. However, existing chemical wastewater treatment equipment still has certain shortcomings. Chemical wastewater has a complex structure, high pollutant concentrations, and is difficult to degrade, which increases the overall cost.

[0003] To overcome the above-mentioned defects, existing technology 1 (Chinese patent CN105601053B, published on May 11, 2018) describes an integrated chemical wastewater treatment tank. This tank is a sealed shell containing a separation zone, a microbial treatment zone, a packing adsorption zone, and an ionization filtration zone. The microbial treatment zone is an annular tank. The separation zone, packing adsorption zone, and ionization filtration zone are located inside the tank. The lower part of the separation zone is connected to the microbial treatment zone via a primary connection port, and the upper part of the microbial treatment zone is connected to the packing adsorption zone via a secondary connection port. A circulating baffle is installed within the tank between the primary and secondary connection ports. The bottom of the packing adsorption zone is connected to the ionization filtration zone via a tertiary connection port. The device of this invention integrates multiple chemical wastewater treatment tanks together, eliminating the need for additional pipeline transportation. The shell has good sealing performance, preventing the leakage of odorous gases during the treatment process. Furthermore, for the long-term treatment section required by the microbial treatment stage of the chemical wastewater, the annular tank fitted on the outside provides additional treatment. This treatment method saves space in the overall device and has good practical effects. Existing technology two (Chinese patent CN211896426U, published on November 10, 2020) describes a chemical wastewater mixing treatment structure, including a waste liquid tank. The left end of the waste liquid tank is fixedly connected to a filter flocculation tank via a conveying pipe. The left end of the filter flocculation tank is fixedly connected to an acid-base adjustment tank via a conveying pipe. A stirring motor is installed at the top of the acid-base adjustment tank, and an output shaft is connected to the bottom of the stirring motor. This chemical wastewater mixing treatment structure uses physical, chemical, and biological treatment methods. Flocculation of industrial wastewater is achieved through the addition of flocculants. The addition of acid-base agents and the rotation of the stirring blades adjust the pH of the industrial chemical wastewater. The addition of oxygen allows for oxygen reaction filtration and purification of the industrial wastewater. It features a degree of automation and integrated treatment, enabling the mixing of industrial wastewater. After the treated chemical wastewater passes testing, it can be directly discharged, thus having a certain environmental protection effect.

[0004] Existing chemical wastewater treatment devices improve filtration efficiency through multiple treatment zones. However, in actual operation, the overall structure is quite complex, involving multiple steps, which makes the treatment process cumbersome and the equipment large in size. Furthermore, the chemical reaction structure only mixes the chemicals through single-axis rotation. This single stirring method results in an unsatisfactory mixing effect between the chemicals and wastewater, leading to insufficient contact between the chemicals and pollutants, thereby reducing the efficiency of the chemical reaction and failing to effectively remove pollutants.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on existing multi-stage chemical wastewater treatment equipment. Therefore, we propose that multi-stage chemical wastewater treatment equipment can effectively solve these problems. Summary of the Invention

[0006] The purpose of this invention is to provide a multi-stage chemical wastewater treatment device to solve the problems mentioned in the background art. Currently available chemical wastewater treatment devices on the market improve filtration efficiency through multiple treatment zones, but in actual operation, the overall structure is relatively complex, involving multiple steps, resulting in a cumbersome treatment process and a large equipment size. Furthermore, the chemical reaction structure only uses single-axis rotation to mix the chemicals. This single stirring method results in an unsatisfactory mixing effect between the chemicals and wastewater, leading to insufficient contact between the chemicals and pollutants, thereby reducing the chemical reaction efficiency and failing to effectively remove pollutants.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage chemical wastewater treatment device, comprising a sedimentation tank, a reaction cylinder, and a filter box. The side end of the sedimentation tank is connected to the reaction cylinder via a conveying pipe. A chemical storage cylinder is provided at the side end of the reaction cylinder. A rotating shaft is connected through the inside of the reaction cylinder. A drive assembly is provided on the outside of the rotating shaft. The drive assembly includes a main gear mounted on the outside of the rotating shaft. A secondary gear is meshed with the side end of the main gear. A gear ring is provided inside the reaction cylinder. The gear ring is meshed with the outside of the secondary gear. A bracket is bearing-connected to the secondary gear. The bracket is bearing-connected to the outside of the rotating shaft. A first rotating rod coaxial with the secondary gear is fixed below the secondary gear. A first stirring element is installed on the outside of the rotating shaft. A spiral element is installed on the outside of the first rotating rod. The chemical reacts with the wastewater, reducing the need for additional drive components that would increase costs. The overall structure is simple and easy to operate. The spiral element and the first stirring element work together to achieve multi-dimensional mixing, enhancing the contact area between the chemical and the wastewater and significantly improving the sufficiency of the chemical reaction.

[0008] Preferably, the sedimentation tank is equipped with a scraper structure, and a receiving box is installed on the side of the sedimentation tank. A filter plate is installed inside the receiving box. The chemical wastewater undergoes static sedimentation in the sedimentation tank, and some large particles of impurities in the water will settle to the bottom of the tank. The scraper structure on the sedimentation tank will scrape off the pollutants on the surface of the sedimentation tank, and the filter plate in the receiving box will perform preliminary filtration of the sediment, separating water and impurities, reducing the load on subsequent treatment, and improving the overall treatment efficiency.

[0009] Preferably, the drug storage cylinder is connected to the reaction cylinder through a first pipe, both ends of which are located at the upper ends of the drug storage cylinder and the reaction cylinder, and the bottom end of the drug storage cylinder is connected to the upper end of the reaction cylinder through a second pipe.

[0010] Preferably, a filter box is provided on the side of the reaction cylinder, and a filter element is installed inside the filter box. A delivery pump is provided on the filter box, and the output end of the delivery pump is connected to the inside of the reaction cylinder through a third pipe. The filter element inside the filter box further filters the wastewater, removing residual fine impurities and reaction products in the water, thereby purifying the wastewater. The first sleeve on the outside of the rotating shaft and the spiral component form an auger structure, which facilitates the upward delivery of the mixture of reagent and wastewater, allowing the mixture to circulate, extending the reaction time, and further improving the treatment effect.

[0011] Preferably, a first sleeve is installed on the outside of the rotating shaft, and a protective sleeve is connected to the side end of the first sleeve through a limiting frame. The protective sleeve is located on the outside of the spiral component.

[0012] Preferably, a water wheel is installed inside the conveying pipe, and a rotating shaft is installed inside the water wheel. The rotating shaft extends through the conveying pipe into the reaction tank. A second stirring element is installed on the outside of the rotating shaft inside the reaction tank. The water wheel drives the second stirring element inside the reaction tank to rotate through the rotating shaft, thereby initially stirring the wastewater entering the reaction tank. This achieves efficient energy utilization, reduces equipment operating energy consumption, and the through hole on the outside of the rotating shaft facilitates the delivery of reagents, allowing wastewater at different liquid levels to come into contact with the reagents, thus improving the overall treatment efficiency.

[0013] Preferably, a second sleeve is fitted on the outer side of the rotating shaft, and the deflection structure connected to the outer side of the rotating shaft by a drive component facilitates the rotation of the nozzle at an angle. The overall structure of the deflection structure is simple, reducing the problem of increased costs caused by setting up complex structures. This allows the nozzle to spray the agent evenly into the wastewater in the reaction cylinder, thereby improving the mixing efficiency of the agent and wastewater, avoiding excessively high or low local concentrations, and ensuring that the reaction proceeds uniformly and efficiently.

[0014] Preferably, the outer side of the rotating shaft has a through hole communicating with its inner cavity, and the second sleeve is connected to the inner cavity of the rotating shaft.

[0015] Preferably, a deflection structure is connected to the outside of the rotating shaft via a driving component, and a nozzle is provided on the deflection structure. The nozzle is connected to the second sleeve via a fourth pipe, and a one-way valve is provided on the first pipe, the second pipe, the third pipe, and the fourth pipe.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: In this multi-stage chemical wastewater treatment equipment, the reagent in the storage tank is transported to the reaction tank through a second pipeline, facilitating the reaction between the reagent and the wastewater. This reduces the need for additional drive systems, which increases costs. The overall structure is simple and easy to operate. The first rotating rod inside the secondary gear drives the spiral component to rotate, enabling multi-dimensional mixing through the cooperation of the spiral component and the first stirring component. This enhances the contact area between the reagent and the wastewater, significantly improving the sufficiency of the chemical reaction. The specific details are as follows:

[0017] The reaction between the reagent and wastewater reduces the need for additional drive components, thus reducing costs. The overall structure is simple and easy to operate. The screw component and the first stirring component work together to achieve multi-dimensional mixing, which enhances the contact area between the reagent and wastewater and significantly improves the adequacy of the chemical reaction.

[0018] Chemical wastewater undergoes static sedimentation in a sedimentation tank, where some large particles settle to the bottom. The scraper structure on the sedimentation tank removes pollutants from the surface, and the filter plate in the receiving tank performs preliminary filtration of the sediment, separating water and impurities, reducing the load on subsequent treatments and improving overall treatment efficiency.

[0019] The filter elements inside the filter box further filter the wastewater, removing residual fine impurities and reaction products, thus purifying the wastewater. The first sleeve on the outside of the rotating shaft forms an auger structure with the spiral component, which facilitates the upward transport of the mixture of reagent and wastewater, allowing the mixture to circulate, extending the reaction time, and further improving the treatment effect.

[0020] The water turbine drives the second agitator inside the reaction tank to rotate via a rotating shaft, which initially agitates the wastewater entering the reaction tank, thereby achieving efficient energy utilization and reducing equipment operating energy consumption. The through hole on the outside of the rotating shaft facilitates the delivery of reagents and allows wastewater at different liquid levels to come into contact with the reagents, improving the overall treatment efficiency.

[0021] The deflection structure connected to the outside of the rotating shaft via a drive component facilitates the rotation of the nozzle at different angles. The overall structure of the deflection structure is simple, reducing the cost increase caused by complex structures. This allows the nozzle to evenly spray the agent into the wastewater in the reaction tank, thereby improving the mixing efficiency of the agent and wastewater, avoiding excessively high or low local concentrations, and ensuring a uniform and efficient reaction. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a top view of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the sedimentation tank of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the filter box of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the reaction cylinder of the present invention;

[0027] Figure 6 This is a schematic diagram of the connection structure between the reaction cylinder and the toothed ring of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection structure between the main gear and the auxiliary gear of the present invention;

[0029] Figure 8 This is a schematic diagram of the connection structure between the main gear and the rotating shaft of the present invention;

[0030] Figure 9 This is a schematic diagram of the connection structure between the reaction cylinder and the conveying pipeline of the present invention;

[0031] Figure 10 This is a schematic diagram of the cross-sectional structure of the first sleeve of the present invention;

[0032] Figure 11 This is a schematic diagram of the connection structure between the rotating shaft and the driving component of the present invention.

[0033] In the diagram: 1. Sedimentation tank; 2. Conveying pipeline; 3. Reaction cylinder; 4. First pipeline; 5. Chemical storage cylinder; 6. Second pipeline; 7. Third pipeline; 8. Conveying pump; 9. Filter box; 10. Filter element; 11. Scraper structure; 12. Receiving box; 13. Filter plate; 14. Rotating shaft; 15. Main gear; 16. Support; 17. Secondary gear; 18. Gear ring; 19. First rotating rod; 20. First stirring element; 21. Spiral element; 22. First sleeve; 23. Limiting frame; 24. Protective cylinder; 25. Water wheel; 26. Rotating shaft; 27. Second stirring element; 28. Second sleeve; 29. ​​Through hole; 30. Driving element; 31. Deflection structure; 32. Nozzle; 33. Fourth pipeline. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: In this example, the spiral component 21 and the first stirring component 20 cooperate to achieve multi-dimensional mixing, enhance the contact area between the reagent and the wastewater, and significantly improve the adequacy of the chemical reaction, such as... Figures 1-3 and Figures 5-7 The technical solution shown includes a sedimentation tank 1, a reaction cylinder 3, and a filter box 9. The side end of the sedimentation tank 1 is connected to the reaction cylinder 3 via a conveying pipe 2. A chemical storage cylinder 5 is provided on the side end of the reaction cylinder 3. A rotating shaft 14 is connected through the inside of the reaction cylinder 3. A drive assembly is provided on the outside of the rotating shaft 14. The drive assembly includes a main gear 15 installed on the outside of the rotating shaft 14. A secondary gear 17 is meshed on the side end of the main gear 15. A gear ring 18 is provided inside the reaction cylinder 3. The gear ring 18 is meshed on the outside of the secondary gear 17. A bracket 16 is bearing-connected to the secondary gear 17. A first rotating rod 19 is fixed below the secondary gear 17 and is coaxial with it. A first stirring element 20 is installed on the outside of the rotating shaft 14. A spiral element 21 is installed on the outside of the first rotating rod 19. Chemical wastewater first enters the sedimentation tank 1 and undergoes static sedimentation in the sedimentation tank 1. Some large particles of impurities in the water will settle to the bottom of the tank. The wastewater after preliminary treatment in the sedimentation tank 1 is conveyed through the conveying pipe. 2. The gas is conveyed to the reaction cylinder 3. At this time, the gas inside the reaction cylinder 3 is conveyed to the storage cylinder 5 through the first pipe 4, which facilitates the gas inside the storage cylinder 5 to compress the agent. The agent in the storage cylinder 5 is then conveyed to the reaction cylinder 3 through the second pipe 6, which facilitates the reaction between the agent and the wastewater. This reduces the need for additional drive components, which would increase costs. The overall structure is simple and easy to operate. The drive motor drives the rotating shaft 14 to rotate. The first stirring element 20 on the outside of the rotating shaft 14 mixes the agent and the wastewater, causing a chemical reaction between the agent and the wastewater. The rotating shaft 14 drives the outer main gear 15 to rotate. The rotation of the main gear 15 drives the meshing secondary gear 17 to rotate. The secondary gear 17 rotates inside the gear ring 18 through the cooperation of the bracket 16. This facilitates the rotation of the first rotating rod 19 inside the secondary gear 17, which drives the spiral element 21 to rotate. This allows the spiral element 21 and the first stirring element 20 to cooperate to achieve multi-dimensional mixing, enhance the contact area between the agent and the wastewater, and significantly improve the sufficiency of the chemical reaction.

[0036] Example 2: In this example, the protective cylinder 24 and the spiral component 21 form an auger structure, which facilitates the upward transport of the mixture of reagent and wastewater, allowing the mixture to circulate. Specifically, as shown below... Figures 2-7 , Figure 9 and Figure 10 As shown, the following is disclosed: a scraper structure 11 is provided on the sedimentation tank 1; a receiving box 12 is installed on the side of the sedimentation tank 1; a filter plate 13 is installed inside the receiving box 12; a storage cylinder 5 is connected to the reaction cylinder 3 through a first pipe 4; both ends of the first pipe 4 are located at the upper ends of the storage cylinder 5 and the reaction cylinder 3; the bottom end of the storage cylinder 5 is connected to the upper end of the reaction cylinder 3 through a second pipe 6; a filter box 9 is provided on the side of the reaction cylinder 3; a filter element 10 is installed inside the filter box 9; a transfer pump 8 is provided on the filter box 9; the output end of the transfer pump 8 is connected to the inside of the reaction cylinder 3 through a third pipe 7; a first sleeve 22 is installed on the outside of the rotating shaft 14; a protective cylinder 24 is connected to the side end of the first sleeve 22 through a limiting frame 23; the protective cylinder 24 is located outside the spiral component 21; the scraper structure 11 on the sedimentation tank 1 scrapes away the contaminants on the surface of the sedimentation tank 1; the scraped contaminants... The material is transported to the receiving box 12 at the side end. The filter plate 13 inside the receiving box 12 will perform preliminary filtration of the sediment, separating water and impurities, reducing the load of subsequent treatment, and improving the overall treatment efficiency. The wastewater treated in the reaction cylinder 3 is transported to the filter box 9 through the third pipe 7 by the transfer pump 8. The filter element 10 inside the filter box 9 further filters the wastewater, removing residual fine impurities and reaction products in the water, purifying the wastewater and ensuring the quality of the effluent. The first sleeve 22 outside the rotating shaft 14 is connected to the protective cylinder 24 by the limiting frame 23 and is located outside the spiral component 21. It not only protects the spiral component 21, but also forms an auger structure with the spiral component 21, which facilitates the upward transport of the mixture of reagent and wastewater, allowing the mixture to circulate, extending the reaction time, and further improving the treatment effect.

[0037] Example 3: In this example, the through hole 29 on the outer side of the rotating shaft 14 facilitates the delivery of the reagent and allows wastewater at different levels to come into contact with the reagent, thus improving the overall treatment efficiency. Specifically, as shown below... Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 11As shown, the following is disclosed: a water wheel 25 is installed inside the conveying pipe 2, and a rotating shaft 26 is installed inside the water wheel 25. The rotating shaft 26 extends through the conveying pipe 2 into the reaction tank 3. A second stirring element 27 is installed on the outside of the rotating shaft 26 inside the reaction tank 3. A second sleeve 28 is fitted on the outside of the rotating shaft 14. A through hole 29 communicating with the inner cavity of the rotating shaft 14 is opened on the outside of the rotating shaft 14. The second sleeve 28 is connected to the inner cavity of the rotating shaft 14. A deflection structure 31 is connected to the outside of the rotating shaft 14 through a driving element 30. A nozzle 32 is installed on the deflection structure 31. The nozzle 32 is connected to the second sleeve through a fourth pipe 33. Pipes 28 are connected. One-way valves are installed on the first pipe 4, second pipe 6, third pipe 7, and fourth pipe 33. When wastewater flows in the conveying pipe 2, it drives the water wheel 25 to rotate. The water wheel 25, through the rotating shaft 26, drives the second stirring element 27 located inside the reaction cylinder 3 to rotate, thus initially stirring the wastewater entering the reaction cylinder 3. This achieves efficient energy utilization and reduces equipment operating energy consumption. The reagent is conveyed through the second pipe 6 to the nozzle 32 for spraying, facilitating mixing with the wastewater. A portion of the reagent in the nozzle 32 is conveyed through the fourth pipe 33 to the second sleeve 28, and then enters... The reagent enters the reaction cylinder 3 through the through hole 29 on the outside of the rotating shaft 14, which facilitates the delivery of the reagent and allows wastewater at different levels to come into contact with the reagent, thus improving the overall treatment efficiency. The reagent is also delivered to the nozzle 32 through the second pipe 6 for spraying, facilitating mixing with the wastewater. The deflection structure 31 connected to the rotating shaft 14 via the drive component 30 facilitates the angular rotation of the nozzle 32. The drive component 30 in this application is a vertically arranged bevel gear structure, which can be replaced with other transmission structures depending on cost. The deflection structure 31... The structure consists of a half-gear and a full-gear coupled with a torsion spring. The bevel gear in the drive component 30 drives the rotating rod to rotate, causing the half-gear on the outside of the rotating rod to drive the full-gear to rotate. This facilitates the rotation of the nozzle 32 through the rotating rod inside the full-gear, allowing the nozzle 32 to evenly spray the reagent into the wastewater in the reaction cylinder 3. The torsion spring on the outside of the rotating rod facilitates the rotation of the half-gear after it leaves the surface of the full-gear. The overall structure is simple, not only easy to replace, but also reduces the cost increase caused by complex structures. This improves the mixing efficiency of the reagent and wastewater, avoids excessively high or low local concentrations, and ensures a uniform and efficient reaction.

[0038] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage treatment device for chemical wastewater, comprising a sedimentation tank (1), a reaction cylinder (3), and a filter box (9), characterized in that, The sedimentation tank (1) is connected to the reaction cylinder (3) via a conveying pipe (2) at one end. A storage cylinder (5) is provided at one end of the reaction cylinder (3). A rotating shaft (14) is connected through the inside of the reaction cylinder (3). A drive assembly is provided on the outside of the rotating shaft (14). The drive assembly includes a main gear (15) installed on the outside of the rotating shaft (14). A secondary gear (17) is meshed on the side of the main gear (15). A toothed ring (18) is provided inside the reaction cylinder (3). The toothed ring (18) is meshed on the outside of the secondary gear (17). A bracket (16) is bearing connected to the secondary gear (17). The bracket (16) is bearing connected to the outside of the rotating shaft (14). A first rotating rod (19) is fixed under the secondary gear (17) and is coaxial with it. A first stirring component (20) is installed on the outside of the rotating shaft (14). A spiral component (21) is installed on the outside of the first rotating rod (19). The drug storage cylinder (5) is connected to the reaction cylinder (3) through the first pipe (4). Both ends of the first pipe (4) are located at the upper ends of the drug storage cylinder (5) and the reaction cylinder (3). The bottom end of the drug storage cylinder (5) is connected to the upper end of the reaction cylinder (3) through the second pipe (6). The conveying pipe (2) is equipped with a water wheel (25), and a rotating shaft (26) is installed inside the water wheel (25). The rotating shaft (26) extends through the conveying pipe (2) to the inside of the reaction cylinder (3). The rotating shaft (26) is located inside the reaction cylinder (3) and a second stirring element (27) is installed on the outside. A second sleeve (28) is sleeved on the outside of the rotating shaft (14). A through hole (29) communicating with its inner cavity is opened on the outside of the rotating shaft (14). The second sleeve (28) is connected to the inner cavity of the rotating shaft (14). A deflection structure (31) is connected to the outside of the rotating shaft (14) through a driving element (30). A nozzle (32) is provided on the deflection structure (31). The nozzle (32) is connected to the second sleeve (28) through a fourth pipe (33). A one-way valve is provided on the first pipe (4), the second pipe (6), the third pipe (7), and the fourth pipe (33).

2. The multi-stage chemical wastewater treatment equipment according to claim 1, characterized in that: The sedimentation tank (1) is provided with a scraper structure (11), and a receiving box (12) is installed on the side of the sedimentation tank (1). A filter plate (13) is installed inside the receiving box (12).

3. The multi-stage chemical wastewater treatment equipment according to claim 1, characterized in that: A filter box (9) is provided on the side of the reaction cylinder (3). A filter element (10) is installed inside the filter box (9). A delivery pump (8) is provided on the filter box (9). The output end of the delivery pump (8) is connected to the inside of the reaction cylinder (3) through a third pipe (7).

4. The multi-stage chemical wastewater treatment equipment according to claim 1, characterized in that: A first sleeve (22) is installed on the outside of the rotating shaft (14). A protective sleeve (24) is connected to the side end of the first sleeve (22) through a limiting frame (23). The protective sleeve (24) is located outside the spiral part (21).

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