Multi-stage treatment equipment for chemical wastewater

Abstract

The invention discloses chemical wastewater multi-stage treatment equipment which comprises a settling pond, a reaction cylinder and a filter box, a medicine storage cylinder is arranged at the side end of the reaction cylinder, a rotating shaft is connected to the interior of the reaction cylinder in a penetrating mode, a driving assembly is arranged on the outer side of the rotating shaft and comprises an auxiliary gear, the auxiliary gear is in bearing connection with a support, and the auxiliary gear is in bearing connection with the filter box. A first rotating rod coaxial with the auxiliary gear is fixed to the lower portion of the auxiliary gear, and a spiral piece is installed on the outer side of the first rotating rod. According to the multi-stage treatment equipment for the chemical wastewater, an agent in the agent storage cylinder is conveyed into the reaction cylinder through a second pipeline, so that the agent can react with the wastewater conveniently, the problem that the cost is increased due to the fact that redundant drive needs to be arranged is solved, the overall structure is simple, and operation is convenient; the spiral part and the first stirring part are matched to realize multi-dimensional mixing, so that the contact area of the medicament and the wastewater is increased, and the sufficiency of chemical reaction is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of chemical wastewater treatment, in particular to a multi-stage chemical wastewater treatment equipment. BACKGROUND

[0002] Chemical enterprises produce a large amount of wastewater in the production process, and wastewater treatment has become a necessary production step. Wastewater treatment separates or converts pollutants in wastewater through various methods to purify wastewater. However, the existing chemical wastewater treatment equipment still has certain defects. The structure of chemical wastewater is complex, the concentration of pollutants is high, and it is difficult to degrade, which increases the overall cost.

[0003] In order to overcome the above-mentioned defects, the existing technology one (Chinese patent with publication number CN105601053B and publication date 2018.05.11) is an integrated chemical wastewater treatment tank. The tank is a sealed shell, and the shell is provided with a separation zone, a microbial treatment zone, a filler adsorption zone and an ionization leaching zone. The microbial treatment zone is an annular tank body, and the separation zone, the filler adsorption zone and the ionization leaching zone are arranged inside the tank body. The lower part of the separation zone is connected to the microbial treatment zone through a first communication port. The upper part of the microbial treatment zone is provided with a second communication port to connect the filler adsorption zone. A circulation partition is arranged between the first communication port and the second communication port in the tank body. The bottom of the filler adsorption zone is provided with a third communication port to connect the ionization leaching zone. The device integrates multiple treatment tanks of chemical wastewater together, without the need for additional pipeline transportation. The sealing performance of the shell is good, which avoids the problem of odor gas leakage during the treatment of chemical wastewater. At the same time, the long-time treatment section required for the microbial treatment section of the chemical wastewater is treated by the annular tank body sleeved on the outside, which saves the floor area of the overall device, has good practical effect, and the existing technology two (Chinese patent with publication number CN211896426U and publication date 2020.11.10) is a chemical wastewater mixing treatment structure, which includes a waste liquid tank. The waste liquid tank is fixedly connected to a filter flocculation tank through a conveying pipe at the left end. The filter flocculation tank is fixedly connected to an acid-base adjusting tank through a conveying pipe at the left end. The acid-base adjusting tank is provided with a stirring motor at the top end. The stirring motor is connected to an output shaft at the bottom end. The chemical wastewater mixing treatment structure uses physical, chemical and biological treatment methods for treatment when in use. The industrial wastewater can be flocculated by adding flocculating agents. The pH value of the industrial wastewater can be adjusted by adding acid-base agents through the rotation of the stirring rotating blades. The industrial wastewater can be filtered and purified through oxygen reaction by adding oxygen. The treatment has certain automation and can be integrated. The mixed treatment of industrial wastewater can be carried out. The treated chemical wastewater can be directly discharged after passing the detection, which has certain environmental protection effect.

[0004] Existing chemical wastewater treatment equipment uses multiple treatment zones to improve filtration efficiency. However, in actual operation, the overall structure is relatively complex and involves multiple steps, resulting in a cumbersome treatment process and a large equipment size. In addition, the chemical liquid reaction structure only mixes the reagents through single-axis rotation. This single stirring method makes the mixing effect of the reagent and wastewater unsatisfactory, resulting in insufficient contact between the reagent and pollutants, thereby reducing the efficiency of the chemical reaction and failing to effectively remove pollutants.

[0005] In response to the above problems, it is urgent to carry out innovative design based on the original chemical wastewater multi-stage treatment equipment. Therefore, we proposed that the chemical wastewater multi-stage treatment equipment can well solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-stage treatment equipment for chemical wastewater to solve the problem proposed in the above background technology that the chemical wastewater treatment devices currently on the market improve the filtration efficiency through multiple treatment areas, but in actual operation, the overall structure is relatively complex and involves multiple steps, resulting in a cumbersome treatment process and a large equipment volume. Moreover, the drug liquid reaction structure only mixes the drugs through single-axis rotation. This single stirring method makes the mixing effect of the drugs and wastewater unsatisfactory, resulting in insufficient contact between the drugs and pollutants, thereby reducing the chemical reaction efficiency and failing to effectively remove pollutants.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A multi-stage treatment equipment for chemical wastewater, comprising a sedimentation tank, a reaction cylinder and a filter box, wherein the side end of the sedimentation tank is connected to the reaction cylinder through a conveying pipe, the side end of the reaction cylinder is provided with a drug storage cartridge, a rotating shaft is connected through the interior of the reaction cylinder, and a drive assembly is provided on the outside of the rotating shaft, the drive assembly comprises a main gear installed on the outside of the rotating shaft, the side end of the main gear is meshedly connected to a pinion, a gear ring is provided inside the reaction cylinder, the gear ring is meshedly connected to the outside of the pinion, the pinion bearing is connected to a bracket, the bracket bearing is connected to the outside of the rotating shaft, a first rotating rod coaxial with the pinion is fixed under the pinion, a first stirring member is installed on the outside of the rotating shaft, and a spiral member is installed on the outside of the first rotating rod, the reagent reacts with the wastewater, reducing the problem of increased cost caused by the need to set up redundant drives, the overall structure is simple and the operation is convenient, the spiral member and the first stirring member cooperate to achieve multi-dimensional mixing, enhance the contact area between the reagent and the wastewater, and significantly improve the sufficiency of the chemical reaction.

[0008] Preferably, a scraper structure is provided on the sedimentation tank, a receiving box is installed at the side end of the sedimentation tank, and a filter plate is installed inside the receiving box. Chemical wastewater is statically precipitated 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 on the sediment to separate water and impurities, thereby reducing the subsequent processing load and improving the overall processing efficiency.

[0009] Preferably, the drug storage cylinder is connected to the reaction cylinder through a first pipe, both ends of the first pipe 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 at the side end of the reaction cylinder, 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 to remove fine impurities and reaction products remaining in the water, so that the wastewater is purified. The first sleeve on the outer side of the rotating shaft and the spiral element form an auger structure, which facilitates the upward transportation of the mixture of the agent and the wastewater, so that the mixed liquid circulates, prolongs the reaction time, and further improves the treatment effect.

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

[0012] Preferably, a water wheel is provided inside the conveying pipe, a rotating shaft is installed inside the water wheel, the rotating shaft passes through the conveying pipe and extends to the inside of the reaction cylinder, the rotating shaft is located inside the reaction cylinder, and a second stirring member is installed on the outside. The water wheel drives the second stirring member located inside the reaction cylinder to rotate through the rotating shaft, and performs preliminary stirring on the wastewater entering the reaction cylinder, thereby realizing effective utilization of energy and reducing energy consumption of equipment operation. The through hole on the outside of the rotating shaft facilitates the transportation of the reagents and facilitates the contact between wastewater at different liquid levels and the reagents, thereby improving the overall treatment efficiency.

[0013] Preferably, a second sleeve is provided on the outside of the rotating shaft, and a deflection structure connected to the outside of the rotating shaft through a driving member facilitates the angular rotation of the nozzle. The overall structure of the deflection structure is simple, which reduces the problem of increased costs caused by setting up a complex structure, so that the nozzle can evenly spray the agent into the wastewater in the reaction cylinder, thereby improving the mixing efficiency of the agent and the wastewater, avoiding excessively high or low local concentrations, and ensuring that the reaction is uniform and efficient.

[0014] Preferably, a through hole communicating with the inner cavity of the rotating shaft is opened on the outer side of the rotating shaft, and the second sleeve is communicated with the inner cavity of the rotating shaft.

[0015] Preferably, the outer side of the rotating shaft is connected to a deflection structure through a driving member, and a nozzle is provided on the deflection structure. The nozzle is connected to the second sleeve through 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 the present invention are as follows: in the multi-stage chemical wastewater treatment equipment, the reagent in the storage cylinder is transported to the reaction cylinder through the second pipeline, which facilitates the reaction between the reagent and the wastewater, reduces the problem of increased costs caused by the need to set up redundant drives, has a simple overall structure, and is easy to operate. The first rotating rod inside the sub-gear drives the spiral member to rotate, so that the spiral member and the first stirring member cooperate to achieve multi-dimensional mixing, increase the contact area between the reagent and the wastewater, and significantly improve the sufficiency of the chemical reaction. The specific contents are as follows: The reagent reacts with the wastewater, reducing the need to set up redundant drives that lead to increased costs. The overall structure is simple and easy to operate. The spiral element and the first stirring element cooperate to achieve multi-dimensional mixing, thereby increasing the contact area between the reagent and the wastewater and significantly improving the sufficiency of the chemical reaction.

[0017] Chemical wastewater is left to settle in the sedimentation tank. 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. The filter plate in the receiving box will perform preliminary filtration on the sediment to separate water and impurities, reduce the subsequent processing load, and improve the overall processing efficiency.

[0018] The filter element inside the filter box further filters the wastewater, removes the fine impurities and reaction products remaining in the water, and purifies the wastewater. The first sleeve on the outside of the rotating shaft and the spiral element form an auger structure, which facilitates the upward transportation of the mixture of the reagent and wastewater, allowing the mixture to circulate, extending the reaction time and further improving the treatment effect.

[0019] The water wheel drives the second stirring element located inside the reaction cylinder to rotate through the rotating shaft, and performs preliminary stirring on the wastewater entering the reaction cylinder, thereby realizing effective energy utilization and reducing the energy consumption of equipment operation. The through hole on the outside of the rotating shaft facilitates the transportation of reagents and facilitates the contact between wastewater at different liquid levels and reagents, thereby improving the overall treatment efficiency.

[0020] The deflection structure connected to the outside of the rotating shaft through a driving member facilitates the angular rotation of the nozzle. The overall structure of the deflection structure is simple, which reduces the problem of increased costs caused by setting up a complex structure, allowing 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 local concentrations that are too high or too low, and ensuring that the reaction is uniform and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall top view of the structure of the present invention; Figure 3 Schematic diagram of the internal structure of the sedimentation tank of the present invention; Figure 4 This is a schematic diagram of the internal structure of the filter box of the present invention; Figure 5 This is a schematic diagram of the internal structure of the reaction tube of the present invention; Figure 6 This is a schematic diagram of the connection structure between the reaction tube and the gear ring of the present invention; Figure 7 This is a schematic diagram of the connection structure between the main gear and the auxiliary gear of the present invention; Figure 8 This is a schematic diagram of the connection structure between the main gear and the rotating shaft of the present invention; Figure 9 This is a schematic diagram of the connection structure between the reaction cylinder and the delivery pipeline of the present invention; Figure 10 This is a schematic diagram of the cross-sectional structure of the first sleeve of the present invention; Figure 11 This is a schematic diagram of the connection structure between the rotating shaft and the driving member of the present invention.

[0022] In the figure: 1. sedimentation tank; 2. conveying pipeline; 3. reaction cylinder; 4. first pipeline; 5. medicine 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. bracket; 17. sub-gear; 18. gear ring; 19. first rotating rod; 20. first stirring element; 21. spiral element; 22. first sleeve; 23. limit 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 DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] Example 1: In this embodiment, the spiral element 21 cooperates with the first stirring element 20 to achieve multi-dimensional mixing, thereby increasing the contact area between the reagent and the wastewater and significantly improving the sufficiency of the chemical reaction. Figure 1-Figure 3 and Figure 5-Figure 7The technical solution shown in the figure 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 through a conveying pipe 2. The side end of the reaction cylinder 3 is provided with a drug storage cylinder 5. A rotating shaft 14 is connected to the inside of the reaction cylinder 3. A driving assembly is provided on the outside of the rotating shaft 14. The driving assembly includes a main gear 15 installed on the outside of the rotating shaft 14. The side end of the main gear 15 is meshed with a sub-gear 17. A gear ring 18 is provided inside the reaction cylinder 3. The gear ring 18 is meshed with the outside of the sub-gear 17. The sub-gear 17 is connected to a bracket 16 with a bearing. The bracket 16 is connected to the outside of the rotating shaft 14 with a bearing. A first rotating rod 19 coaxial with the sub-gear 17 is fixed under it. A first stirring member 20 is installed on the outside of the rotating shaft 14. A spiral member 21 is installed on the outside of the first rotating rod 19. Chemical wastewater first enters the sedimentation tank 1 and is statically precipitated 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 passed through the conveying pipe 2 is transported to the reaction cylinder 3. At this time, the internal gas of the reaction cylinder 3 is transported to the inside of the drug storage cylinder 5 through the first pipe 4, which facilitates the internal gas of the drug storage cylinder 5 to squeeze the drug, so that the drug in the drug storage cylinder 5 is transported to the reaction cylinder 3 through the second pipe 6, which facilitates the reaction of the drug with the wastewater, reducing the problem of increased cost caused by the need to set up redundant drives. The overall structure is simple and easy to operate. The drive motor is used to drive the rotating shaft 14 to rotate. The first stirring member 20 on the outside of the rotating shaft 14 mixes the drug with the wastewater, so that the drug and the wastewater react chemically, and the rotating shaft 14 drives the outer main gear 15 to rotate. The rotation of the main gear 15 drives the meshing sub-gear 17 to rotate. The sub-gear 17 rotates inside the gear ring 18 through the cooperation of the bracket 16, which facilitates the first rotating rod 19 inside the sub-gear 17 to drive the spiral member 21 to rotate, so that the spiral member 21 cooperates with the first stirring member 20 to achieve multi-dimensional mixing, enhance the contact area between the drug and the wastewater, and significantly improve the sufficiency of the chemical reaction. Embodiment 2: In this embodiment, the protective tube 24 and the spiral member 21 form an auger structure, which facilitates the upward transportation of the mixture of the agent and the wastewater, so that the mixture circulates. Figure 2-Figure 7 、 Figure 9 and Figure 10As shown, it is disclosed that the sedimentation tank 1 is provided with a scraper structure 11, the side end of the sedimentation tank 1 is provided with a receiving box 12, the inside of the receiving box 12 is provided with a filter plate 13, the storage cylinder 5 is connected with the reaction cylinder 3 through the first pipeline 4, both ends of the first pipeline 4 are located on the storage cylinder 5 and the upper end of the reaction cylinder 3, the bottom end of the storage cylinder 5 is connected with the upper end of the reaction cylinder 3 through the second pipeline 6, the side end of the reaction cylinder 3 is provided with a filter box 9, the inside of the filter box 9 is provided with a filter 10, the filter box 9 is provided with a delivery pump 8, the output end of the delivery pump 8 is connected in the reaction cylinder 3 through the third pipeline 7, the outside of the rotating shaft 14 is provided with a first sleeve 22, the side end of the first sleeve 22 is connected with a protective cylinder 24 through a limiting frame 23, the protective cylinder 24 is located outside the spiral member 21, the scraper structure 11 on the sedimentation tank 1 can scrape off the pollutants on the surface of the sedimentation tank 1, the scraped pollutants are transported to the receiving box 12 at the side end, the filter plate 13 in the receiving box 12 can preliminarily filter the sediments, separate the moisture and impurities, reduce the subsequent processing load, improve the overall processing efficiency, the treated wastewater in the reaction cylinder 3 is transported to the filter box 9 through the third pipeline 7 under the action of the delivery pump 8, the filter 10 in the filter box 9 further filters the wastewater, removes the small impurities and reaction products remaining in the water, purifies the wastewater, protects the water quality, the first sleeve 22 outside the rotating shaft 14 is connected with the protective cylinder 24 outside the spiral member 21 through the limiting frame 23, not only protects the spiral member 21, but also forms an auger structure with the protective cylinder 24 and the spiral member 21, which facilitates the upward transportation of the mixed liquid of the medicament and the wastewater, circulates the mixed liquid, prolongs the reaction time, and further improves the processing effect. In this embodiment, the through hole 29 outside the rotating shaft 14 facilitates the transportation of the medicament, facilitates the contact of wastewater with different liquid levels and medicaments, and improves the overall processing efficiency. Figure 5 、 Figure 6 、 Figure 8 、 Figure 9 and Figure 11As shown, it is disclosed that: a water wheel 25 is provided inside the delivery pipe 2, a rotating shaft 26 is installed inside the water wheel 25, the rotating shaft 26 passes through the delivery pipe 2 and extends to the inside of the reaction cylinder 3, the rotating shaft 26 is located inside the reaction cylinder 3, and a second stirring member 27 is installed on the outside of the rotating shaft 14, a second sleeve 28 is sleeved on the outside of the rotating shaft 14, a through hole 29 connected to 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, and a deflection structure 31 is connected to the outside of the rotating shaft 14 through a driving member 30, and a nozzle 32 is provided on the deflection structure 31, and the nozzle 32 is connected to the second sleeve through a fourth pipe 33. 28 are connected, and a one-way valve is provided on the first pipe 4, the second pipe 6, the third pipe 7 and the fourth pipe 33. When the wastewater flows in the delivery pipe 2, it drives the water wheel 25 to rotate. The water wheel 25 drives the second stirring member 27 located inside the reaction cylinder 3 to rotate through the rotating shaft 26, and performs preliminary stirring on the wastewater entering the reaction cylinder 3, thereby realizing the effective utilization of energy and reducing the energy consumption of the equipment operation. The reagent is transported to the nozzle 32 through the second pipe 6 for spraying, which facilitates the mixing of the reagent with the wastewater. The reagent part in the nozzle 32 is transported to the inside of the second sleeve 28 through the fourth pipe 33, and then enters The inner cavity of the rotating shaft 14 enters the reaction cylinder 3 through the through hole 29 on the outside of the rotating shaft 14. The through hole 29 on the outside of the rotating shaft 14 facilitates the transportation of the reagent, facilitates the contact between the wastewater at different liquid levels and the reagent, and improves the overall treatment efficiency. The reagent is transported to the nozzle 32 through the second pipe 6 for spraying, which facilitates the mixing of the reagent with the wastewater. The deflection structure 31 connected to the outside of the rotating shaft 14 by the driving member 30 facilitates the angular rotation of the nozzle 32. The driving member 30 set in this application is a vertically arranged bevel gear structure, which can be replaced with other transmission structures according to cost, and the deflection structure 31 The structure is a half gear and a full gear matched with a torsion spring. The bevel gear in the driving part 30 drives the rotating rod to rotate, so that the half gear on the outside of the rotating rod drives the full gear to rotate, which facilitates the rotating rod passing through the inside of the full gear to drive the nozzle 32 to rotate, so that the nozzle 32 can evenly spray the agent into the wastewater in the reaction cylinder 3. The torsion spring on the outside of the rotating rod facilitates the half gear to rotate after leaving the surface of the full gear. The overall structure is simple, which is not only convenient for replacement, but also reduces the problem of increased cost caused by setting up a complex structure, thereby improving the mixing efficiency of the agent and wastewater, avoiding excessively high or low local concentrations, and ensuring uniform and efficient reaction.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection 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 side end of the sedimentation tank (1) is connected to the reaction cylinder (3) through the conveying pipe (2), and the side end of the reaction cylinder (3) is provided with a drug storage cylinder (5). The inside of the reaction cylinder (3) is connected with a rotating shaft (14), and the outside of the rotating shaft (14) is provided with a driving assembly, and the driving assembly includes a main gear (15) installed on the outside of the rotating shaft (14), and the side end of the main gear (15) is meshedly connected with a sub-gear (17). A gear ring (18) is provided inside the reaction cylinder (3), and the gear ring (18) is meshedly connected to the outside of the sub-gear (17). The sub-gear (17) is connected to a bracket (16) on a bearing, and the bracket (16) is connected to the outside of the rotating shaft (14). A first rotating rod (19) coaxial with the sub-gear (17) is fixed under the sub-gear (17), and a first stirring member (20) is installed on the outside of the rotating shaft (14). A spiral member (21) is installed on the outside of the first rotating rod (19).

2. A multi-stage chemical wastewater treatment equipment according to claim 1, characterized in that: A scraper structure (11) is provided on the sedimentation tank (1), a receiving box (12) is installed at the side end of the sedimentation tank (1), and 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: The drug 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 drug storage cylinder (5) and the reaction cylinder (3), and the bottom end of the drug storage cylinder (5) is connected to the upper end of the reaction cylinder (3) through a second pipe (6).

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

5. 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), and a side end of the first sleeve (22) is connected to a protective sleeve (24) via a limiting frame (23), and the protective sleeve (24) is located outside the spiral member (21).

6. The multi-stage chemical wastewater treatment equipment according to claim 1, characterized in that: A water wheel (25) is provided inside the delivery pipe (2), a rotating shaft (26) is installed inside the water wheel (25), the rotating shaft (26) passes through the delivery pipe (2) and extends to the inside of the reaction cylinder (3), and a second stirring member (27) is installed outside the rotating shaft (26) located inside the reaction cylinder (3).

7. The multi-stage chemical wastewater treatment equipment according to claim 3, characterized in that: A second sleeve (28) is sleeved on the outer side of the rotating shaft (14).

8. The multi-stage chemical wastewater treatment equipment according to claim 7, characterized in that: A through hole (29) communicating with the inner cavity of the rotating shaft (14) is provided on the outer side of the rotating shaft (14), and the second sleeve (28) is communicated with the inner cavity of the rotating shaft (14).

9. The multi-stage chemical wastewater treatment equipment according to claim 8, characterized in that: The outer side of the rotating shaft (14) is connected to a deflection structure (31) via a driving member (30), and a nozzle (32) is provided on the deflection structure (31). The nozzle (32) is connected to the second sleeve (28) via a fourth pipe (33), and a one-way valve is provided on the first pipe (4), the second pipe (6), the third pipe (7) and the fourth pipe (33).

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