Multistage desulfurization device and process for chemical engineering wastewater

Abstract

The application belongs to the technical field of wastewater treatment, and specifically discloses a multi-stage desulfurization treatment device for chemical engineering wastewater, which comprises a filtering structure, a first-stage treatment equipment connected to the filtering structure, and a staged treatment mechanism connected to the first-stage treatment equipment. The first-stage treatment equipment comprises a barrel structure, the bottom of the barrel structure is fixed with a collecting pipe, the inside of the barrel structure is distributed with a water spraying cavity, the inner cavity of the water spraying cavity is provided with a flow dividing part at the upper portion, the lower end of the water spraying cavity is fixed with a water collecting pipe, and the water collecting pipe is rotatable on the collecting pipe. The application also relates to a multi-stage desulfurization process for chemical engineering wastewater. The first-stage treatment equipment can be used for flocculation treatment of the chemical engineering wastewater filtered by the filtering structure, then the pressure filtration equipment can be used for pressure filtration treatment of the flocculated wastewater, the reverse osmosis separation equipment can be used for reverse osmosis filtration of the pressure-filtered wastewater, and the desulfurization equipment can be used for desulfurization treatment of the reverse osmosis-filtered wastewater, so that the multi-stage treatment of the chemical engineering wastewater can be realized.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and specifically discloses a multi-stage desulfurization treatment device and process for chemical engineering wastewater. Background Technology

[0002] Chemical engineering projects generate a significant amount of chemical wastewater during operations. To ensure that this wastewater meets environmental emission requirements, desulfurization treatment is necessary before it is discharged.

[0003] However, in the process of desulfurization, chemical wastewater needs to be treated in multiple stages. In the primary treatment stage, a certain amount of lime slurry needs to be added to the chemical wastewater. This process is to adjust the pH value of the chemical wastewater to facilitate subsequent flocculation and clarification.

[0004] When workers add lime slurry to chemical wastewater, they usually install paddles at the bottom of the mixing tank. When the motor's output shaft drives the paddles to rotate inside the mixing tank, the paddles can turbulent the wastewater and lime slurry inside the mixing tank, achieving rapid mixing of the wastewater and lime slurry. However, when the lime slurry is added to the mixing tank, it is easy for it to divert in the wastewater. If the lime slurry is not added to the mixing tank before it is fully mixed, the clumps in the lime slurry are likely to reach the bottom of the mixing tank before the clumps disperse. This can easily lead to poor mixing efficiency of the lime slurry in the wastewater, and can also easily cause the clumps in the lime slurry to wear down the slurry, thus affecting the service life of the paddles.

[0005] To address this issue, we propose a multi-stage desulfurization treatment device and process for chemical engineering wastewater. This addresses the problem that lumps in lime slurry tend to reach the bottom of the mixing tank before they can diffuse, resulting in poor mixing efficiency of the lime slurry in the wastewater and affecting the service life of the impeller. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a multi-stage desulfurization treatment device for chemical engineering wastewater to solve the problems mentioned above.

[0007] To achieve the above objectives, the present invention provides a multi-stage desulfurization treatment device for chemical engineering wastewater, including a filter structure, a primary treatment device connected to the filter structure, and a graded treatment mechanism connected to the primary treatment device. The primary treatment device includes a barrel structure, a collection pipe fixed at the bottom of the barrel structure, spray chambers distributed inside the barrel structure, a diversion section provided at the upper part of the inner cavity of the spray chamber, and a water collection pipe fixed at the lower end of the spray chamber, the water collection pipe rotating on the collection pipe.

[0008] A flow guide is provided on the part of the water spray chamber near the water collection pipe. The flow guide is provided with jet holes in a dot matrix pattern. Mixing blades are fixed at equal intervals on the lower part of the water collection pipe. Turbulence blades are fixed at equal intervals on the upper part of the water spray chamber. A water receiving pipe is rotatably connected to the lower end of the water collection pipe.

[0009] A water guide ring is fixed on the inner wall of the barrel structure above the water spray chamber. A water distribution plate is fixed at equal intervals on the side of the water guide ring near the turbulence blade. Water spray holes are opened at equal intervals on the part of the water guide ring near the barrel structure.

[0010] In the above technical solution, the barrel structure has an internal rotating transmission rod, the upper end of which is connected to a transmission motor, and transmission blades are fixed at equal intervals on the transmission rod.

[0011] In the above technical solution, a cover structure is fixed on the top of the barrel structure, and a waterproof shell is fixed on the bottom wall of the inner cavity of the cover structure. The waterproof shell is sleeved on the drive motor.

[0012] In the above technical solution, a protective conduit is further fixed on the cover structure, the external wiring of the drive motor passes through the protective conduit, and the output shaft of the drive motor passes through the waterproof shell and the transmission rod for fixation.

[0013] In the above technical solution, a first pump and a second pump are detachably connected to the collection pipe. The output end of the first pump is connected to the inner cavity of the collection pipe, and the output end of the second pump is connected to the receiving end of the water inlet pipe.

[0014] In the above technical solution, the cover structure is further provided with an external drain pipe, the bottom wall of the inner cavity of the barrel structure and the corresponding part of the guide section are provided with rounded corners, and the water guide ring is a ring structure.

[0015] In the above technical solution, the water guide ring is a ring structure with an upward arched inner edge, and the upper part of the water spray hole is provided with a water-dividing chamfer, which is a chamfer opened on the upper part of the water spray hole.

[0016] In the above technical solution, the receiving end of the second pump is connected to the discharge end of the filter structure, the second pump is detachably connected to the frame of the filter structure, and the water inlet pipe has an L-shaped tubular structure.

[0017] In the above technical solution, the graded treatment mechanism further includes a filter press connected to the external discharge pipe, the discharge end of the filter press is connected to a reverse osmosis separation device, and the discharge end of the reverse osmosis separation device is connected to a desulfurization device.

[0018] A multi-stage desulfurization process for chemical engineering wastewater includes the following steps:

[0019] Step 1: Filtration. Chemical wastewater is added to the inside of the filter structure in advance, and the wastewater filtered by the filter structure is discharged into the inside of the spray chamber.

[0020] Step 2, mixing: A certain amount of lime water is added inside the collection pipe. The mixing blades drive the lime water and the sewage sprayed from the spray chamber to mix, achieving a suitable pH value for the chemical sewage. The turbulence blades cause the lime water to turbulently roll, breaking the clumps in the lime water into small particles.

[0021] Step 3: Diversion and mixing. The water guide ring and the turbulence blades turbulent the lime water and chemical wastewater inside the barrel structure. The water guide ring guides the chemical wastewater mixed with lime water, leading to the centralized discharge of the chemical wastewater mixed with lime water.

[0022] Step 4: Flocculation. A measured amount of flocculant is added inside the barrel structure. The flocculant comes into contact with the chemical wastewater that is concentrated and guided by the water guide ring, forming flocs inside the barrel structure.

[0023] Step 5: Multi-stage treatment. The flocculated chemical wastewater inside the barrel structure is discharged into the internal filter press through the external discharge pipe for filter press treatment. The chemical wastewater after filter press treatment is further treated inside the reverse osmosis separation equipment. The chemical wastewater treated by the reverse osmosis separation equipment is then desulfurized inside the desulfurization equipment.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The primary treatment equipment in this device can neutralize and flocculate the chemical engineering wastewater that has been filtered by the filtration structure. Then, the filter press equipment can filter the flocculated wastewater. The reverse osmosis separation equipment can filter the filter press wastewater again. The desulfurization equipment can desulfurize the wastewater after reverse osmosis filtration, thus realizing multi-stage treatment of chemical wastewater.

[0026] 2. The first pump in the device drives the lime water to be transported into the collection pipe, and the second pump drives the filtered chemical wastewater to be transported into the spray chamber. The diversion section can drive the wastewater inside the spray chamber to be jetted into the internal structure of the barrel, thereby realizing the rapid mixing of the wastewater filtered by the filtration structure and the lime water transported by the first pump, and realizing the pH adjustment of the chemical wastewater.

[0027] 3. When the first pump in the device drives the lime water to be transported into the inside of the collection pipe, the mixing blades can drive the lime water to be transported into the inside of the barrel structure. Since the bottom wall of the inner cavity of the barrel structure and the corresponding part of the guide section are provided with rounded corners, when the spray chamber drives the sewage to be jetted into the inside of the barrel structure, the sewage and lime water are quickly mixed. At the same time, the jetted sewage can also impact the clumps in the lime water, which can break the large clumps in the lime water into more small clumps.

[0028] 4. After the sewage and lime water in the device are mixed, the sewage mixed with lime water can pass through the inside of the spray hole. At the same time, the water guide ring can guide the sewage mixed with lime water. Then, the staff adds flocculant to the inside of the tank structure. The drive blade can drive the flocculant and the sewage in contact with the flocculant to be transported to the water guide ring, thereby realizing the convection impact of the sewage guided by the water guide ring and the sewage mixed with flocculant, realizing the rapid mixing and discharge of sewage inside the tank structure. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a diagram showing the connection structure between the lid structure and the barrel structure in this invention;

[0031] Figure 3 for Figure 2 Cross-sectional structural diagram;

[0032] Figure 4 This is a diagram showing the connection structure between the transmission rod and the water spray chamber in this invention;

[0033] Figure 5 This is a through-structure diagram of the transmission rod and water guide ring in this invention;

[0034] Figure 6 This is a diagram showing the connection structure between the turbulence-causing blades and the water spray chamber in this invention;

[0035] Figure 7 This is a schematic diagram showing the distribution of the water guide ring and the drive blades in this invention;

[0036] Figure 8 for Figure 5 Enlarged structural diagram of A in the middle;

[0037] Figure 9 This is the connection structure between the water distribution plate and the spray hole and the water guide ring in this invention.

[0038] 1. Filtration structure; 2. Primary treatment equipment; 21. Cover structure; 22. Protective conduit; 23. Barrel structure; 24. Waterproof shell; 25. Drive motor; 26. Drive rod; 27. Drive blade; 28. Collection pipe; 29. ​​Outlet pipe; 3. Filter press; 4. Reverse osmosis separation equipment; 5. Desulfurization equipment; 6. First pump; 7. Second pump; 8. Water guide ring; 81. Water distribution plate; 82. Spray hole; 83. Water distribution chamfer; 9. Spray chamber; 91. Turbulence blade; 92. Jet hole; 93. Mixing blade; 94. Water receiving pipe; 95. Flow guide section; 96. Flow divider section; 97. Water collection pipe; 10. Graded treatment mechanism. Detailed Implementation

[0039] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0041] When adding lime slurry to chemical wastewater, workers typically install paddles at the bottom of the mixing tank. When the motor's output shaft drives the paddles to rotate inside the mixing tank, the paddles can turbulent the wastewater and lime slurry, achieving rapid mixing. However, when the lime slurry is added to the mixing tank, it is prone to diversion within the wastewater. If the lime slurry is not added to the mixing tank before thorough mixing, clumps in the lime slurry can reach the bottom of the mixing tank before dispersing, leading to poor mixing efficiency of the lime slurry in the wastewater. Furthermore, the clumps in the lime slurry can cause wear and tear on the slurry, thus affecting the service life of the paddles. To address these issues, the following structural design is proposed.

[0042] Example 1: Please refer to Figure 1-8 As shown, the present invention provides a technical solution:

[0043] This invention is a multi-stage desulfurization treatment device for chemical engineering wastewater, including a filter structure 1, a primary treatment device 2 connected to the filter structure 1, and a graded treatment mechanism 10 connected to the primary treatment device 2. The primary treatment device 2 includes a barrel structure 23, a collection pipe 28 fixed at the bottom of the barrel structure 23, spray chambers 9 distributed inside the barrel structure 23, a diversion part 96 provided at the upper part of the inner cavity of the spray chamber 9, and a water collection pipe 97 fixed at the lower end of the spray chamber 9, the water collection pipe 97 rotating on the collection pipe 28.

[0044] A guide section 95 is provided on the water spray chamber 9 near the water collection pipe 97. The guide section 95 has jet holes 92 in a dot matrix pattern. Mixing blades 93 are fixed at equal intervals on the lower part of the water collection pipe 97. Turbulence blades 91 are fixed at equal intervals on the upper part of the water spray chamber 9. A water receiving pipe 94 is rotatably connected to the lower end of the water collection pipe 97.

[0045] A water guide ring 8 is fixed on the inner wall of the barrel structure 23 above the water spray chamber 9. A water distribution plate 81 is fixed at equal intervals on the side of the water guide ring 8 near the turbulence blade 91. Water spray holes 82 are opened at equal intervals on the part of the water guide ring 8 near the barrel structure 23.

[0046] The filter structure 1 can be selected from the existing chemical wastewater filtration structures on the market. In actual use, the filter structure 1 can filter chemical wastewater. After the filtered chemical wastewater is collected inside the spray chamber 9, the collection pipe 28 will collect lime water. Then, the mixing blade 93 will drive the lime water to be transported inside the barrel structure 23. The wastewater inside the spray chamber 9 will be sprayed onto the lime water through the jet hole 92. This can reduce the falling speed of the clumps in the lime water, which is conducive to the rapid mixing of the clumps in the lime water with the water, thereby achieving rapid mixing of lime water and wastewater.

[0047] As lime water is continuously transported inside the collection pipe 28, the mixing blade 93 can continuously drive the lime water upwards. The wastewater mixed with lime water will pass through the spray hole 82. At the same time, the water guide ring 8 can also guide the wastewater mixed with lime water, thus facilitating the rapid mixing of lime water and wastewater.

[0048] Example 2: Please refer to Figure 2-8 As shown, based on Embodiment 1, the present invention provides a technical solution. Unlike Embodiment 1, in this embodiment, the transmission rod 26 can drive the transmission blade 27 to rotate. At this time, the sewage around the transmission blade 27 can flow to the surrounding area of ​​the spray chamber 9, thereby realizing the convection of sewage in the upper part of the barrel structure 23 and sewage in the lower part of the barrel structure 23, and increasing the mixing effect of sewage, lime water and flocculant.

[0049] The barrel structure 23 has a rotating transmission rod 26 inside, the upper end of the transmission rod 26 is connected to a transmission motor 25, and transmission blades 27 are fixed at equal intervals on the transmission rod 26.

[0050] An addition pipe is provided in the middle of the barrel structure 23. The staff can add flocculant to the inside of the barrel structure 23 through the addition pipe. The drive blade 27 can drive the flocculant to mix with the sewage inside the barrel structure 23, thereby realizing the flocculation treatment of sewage with added lime water.

[0051] A cover structure 21 is fixed on the top of the barrel structure 23. A waterproof shell 24 is fixed on the bottom wall of the inner cavity of the cover structure 21. The waterproof shell 24 is sleeved on the drive motor 25.

[0052] The waterproof housing 24 can protect the drive motor 25 and prevent the drive motor 25 from coming into contact with sewage inside the cover structure 21.

[0053] A protective conduit 22 is fixed on the cover structure 21. The external wiring of the drive motor 25 passes through the protective conduit 22. The output shaft of the drive motor 25 passes through the waterproof shell 24 and the drive rod 26 and is fixed.

[0054] When the output shaft of the drive motor 25 drives the drive rod 26 to rotate, the drive rod 26 can drive the drive blade 27 to rotate. At this time, the sewage around the drive blade 27 can flow to the area around the spray chamber 9, thereby realizing the convection of sewage in the upper part of the barrel structure 23 and sewage in the lower part of the barrel structure 23, and increasing the mixing effect of sewage, lime water and flocculant.

[0055] Example 3: Please refer to Figure 2-8 As shown, based on Embodiment 2, the present invention provides a technical solution. Unlike Embodiment 2, in this embodiment, the wastewater mixed with lime water flows inside the rounded corner of the barrel structure 23, which facilitates the flow of the wastewater mixed with lime water into the water guide ring 8, realizing the tumbling of lime water and wastewater, which is conducive to the rapid mixing of lime water and wastewater.

[0056] A first pump 6 and a second pump 7 are detachably connected to the collection pipe 28. The output end of the first pump 6 is connected to the inner cavity of the collection pipe 28, and the output end of the second pump 7 is connected to the receiving end of the water inlet pipe 94.

[0057] The first pump 6 can drive lime water to be transported into the collection pipe 28, while the second pump 7 can drive the wastewater filtered by the filter structure 1 to be transported into the spray chamber 9 through the water inlet pipe 94 and the water collection pipe 97.

[0058] An external drain pipe 29 is fixedly connected to the cover structure 21. The bottom wall of the inner cavity of the barrel structure 23 and the corresponding part of the guide section 95 are provided with rounded corners. The water guide ring 8 is a ring structure.

[0059] The external discharge pipe 29 can transport the flocculated wastewater to the inside of the filter press 3. When the wastewater sprayed from the spray chamber 9 sprays the lime water into the inner cavity of the barrel structure 23, the wastewater mixed with lime water will flow inside the rounded corner of the barrel structure 23, which facilitates the flow of the wastewater mixed with lime water into the guide ring 8, so as to realize the rolling of lime water and wastewater, which is conducive to the rapid mixing of lime water and wastewater.

[0060] The water guide ring 8 is a ring structure with the inner edge arched upward. The upper part of the water spray hole 82 is provided with a water-dividing chamfer 83, which is a chamfer opened on the upper part of the water spray hole 82.

[0061] By setting the water guide ring 8 as an annular structure with its inner edge arched upwards, the opening at the top of the water guide ring 8 can be smaller than the opening at the bottom. Such a water guide ring 8 can be a bucket-shaped structure, which facilitates the flow of wastewater mixed with lime water to the vibrating blade 27. When the driving blade 27 drives the wastewater mixed with lime water to be transported to the vibrating chamber 9, the turbulence blade 91 can drive the wastewater mixed with lime water to be transported to the vibrating hole 82. Subsequently, the wastewater mixed with lime water can be sprayed out through the spraying hole 82.

[0062] The receiving end of the second pump 7 is connected to the discharge end of the filter structure 1. The second pump 7 is detachably connected to the frame of the filter structure 1 and has an L-shaped tubular structure for the water inlet pipe 94.

[0063] When the output end of the drive motor 25 drives the water collection pipe 97 on the spray chamber 9 to rotate through the drive rod 26, the water collection pipe 97 can rotate around the water receiving pipe 94. The gap between the water collection pipe 97 and the water receiving pipe 94 can be sealed by existing technology. This enables the spray chamber 9 to stably drive the turbulence blade 91 to turbulentize the sewage and lime water, and to transport the sewage mixed with lime water to the vicinity of the spray hole 82.

[0064] The graded treatment unit 10 includes a filter press 3 connected to the external discharge pipe 29, a reverse osmosis separation unit 4 connected to the discharge end of the filter press 3, and a desulfurization unit 5 connected to the discharge end of the reverse osmosis separation unit 4.

[0065] The filter press 3, reverse osmosis separation equipment 4, and desulfurization equipment 5 can all be selected from existing commercial structures. In this document, they serve to work in conjunction with the primary treatment equipment 2 to perform multi-stage treatment of chemical wastewater.

[0066] A multi-stage desulfurization process for chemical engineering wastewater includes the following steps:

[0067] Step 1: Filtration. Chemical wastewater is added to the inside of filter structure 1 beforehand. The wastewater filtered by filter structure 1 is discharged into the inside of spray chamber 9.

[0068] Step 2, mixing: A certain amount of lime water is added inside the collection pipe 28. The mixing blade 93 drives the lime water and the sewage sprayed from the spray chamber 9 to mix, achieving a suitable pH value for the chemical sewage. The turbulence blade 91 drives the lime water to turbulence and roll, breaking the clumps in the lime water into small particles.

[0069] Step 3: Diversion and mixing. The water guide ring 8 and the turbulence blade 91 turbulent the lime water and chemical wastewater inside the barrel structure 23. The water guide ring 8 guides the chemical wastewater mixed with lime water, leading to the centralized discharge of the chemical wastewater mixed with lime water.

[0070] Step 4: Flocculation. A fixed amount of flocculant is added inside the barrel structure 23. The flocculant comes into contact with the chemical wastewater that is concentrated and guided by the water guide ring 8, and flocs are formed inside the barrel structure 23.

[0071] Step 5: Multi-stage treatment. The chemical wastewater flocculated inside the barrel structure 23 is discharged into the internal filter press 3 through the external discharge pipe 29 for filter press treatment. The chemical wastewater after filter press treatment in the filter press 3 is treated again inside the reverse osmosis separation equipment 4. The chemical wastewater treated in the reverse osmosis separation equipment 4 is then desulfurized inside the desulfurization equipment 5.

[0072] Working principle: In actual use, the staff first transports the chemical wastewater into the filter structure 1. At this time, the filter structure 1 can filter and treat the chemical wastewater. The filtered chemical wastewater can be pumped into the water collection pipe 97 by the second pump 7. The first pump 6 can drive lime water to be transported into the collection pipe 28. When the chemical wastewater enters the water collection pipe 97, the diversion part 96 can guide the filtered chemical wastewater. Then the chemical wastewater in the spray chamber 9 can be sprayed out through the jet hole 92.

[0073] The lime water inside the collection pipe 28 will surge upward under the action of the mixing blade 93. During this process, the lime water will be stirred inside the collection pipe 28. When the sewage sprayed from the jet hole 92 comes into contact with the lime water transported by the mixing blade 93, the sewage mixed with lime water will roll in the rounded corner of the barrel structure 23. This can reduce the falling speed of the clumps in the lime water and facilitate the rapid mixing of the clumps with the water. Subsequently, the turbulence blade 91 will drive the sewage mixed with lime water to be transported around the spray hole 82.

[0074] Workers can add flocculant to the inside of the barrel structure 23 through the addition pipe on the barrel structure 23. The drive blade 27 can drive the flocculant to mix with the sewage inside the barrel structure 23, thereby achieving flocculation treatment of sewage with added lime water. When the drive blade 27 drives the sewage mixed with lime water to be transported around the spray chamber 9, the turbulence blade 91 can drive the sewage mixed with lime water to be transported around the spray hole 82. Then the sewage mixed with lime water can be sprayed out through the spray hole 82.

[0075] Because the spray nozzle 82 is equipped with a water-dividing chamfer 83, the area of ​​the spray nozzle 82 spraying sewage through the water-dividing chamfer 83 is increased, thereby expanding the mixing effect of sewage, lime water, and flocculant. The flocculated sewage can be transported to the inside of the filter press 3 through the external discharge pipe 29. The filter press 3 can filter the flocculated wastewater. The filtered sewage can be transported to the inside of the reverse osmosis separation equipment 4. The reverse osmosis separation equipment 4 filters the filtered wastewater again through reverse osmosis. The filtered sewage can be transported to the inside of the desulfurization equipment 5. The desulfurization equipment 5 desulfurizes the filtered wastewater through reverse osmosis, thereby realizing multi-stage treatment of chemical wastewater.

[0076] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A multi-stage desulfurization treatment device for chemical engineering wastewater, comprising a filtering structure (1), a first-stage treatment equipment (2) connected to the filtering structure (1), and a staged treatment mechanism (10) connected to the first-stage treatment equipment (2), characterized in that: The primary treatment equipment (2) includes a barrel structure (23), the bottom of the barrel structure (23) is fixedly provided with a collecting pipe (28), the inside of the barrel structure (23) is distributed with a water spraying cavity (9), the upper part of the inner cavity of the water spraying cavity (9) is provided with a shunt part (96), the lower end of the water spraying cavity (9) is fixedly provided with a water collecting pipe (97), and the water collecting pipe (97) rotates on the collecting pipe (28); The part, close to the water collecting pipe (97), of the water spraying cavity (9) is provided with a flow guide part (95), the flow guide part (95) is provided with jet flow holes (92) in a dot matrix manner, the lower part of the water collecting pipe (97) is fixedly provided with mixing paddles (93) at equal intervals, the upper part of the water spraying cavity (9) is fixedly provided with turbulence paddles (91) at equal intervals, and the lower end of the water collecting pipe (97) is rotatably provided with a water receiving pipe (94). The inner wall of the barrel structure (23) is fixedly provided with a water guide ring (8) above the water spraying cavity (9), the side, close to the turbulence paddles (91), of the water guide ring (8) is fixedly provided with water distribution plates (81) at equal intervals, and the part, close to the barrel structure (23), of the water guide ring (8) is provided with water spraying holes (82) at equal intervals.

2. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 1, characterized in that, The inside of the barrel structure (23) is rotatably provided with a transmission rod (26), the upper end of the transmission rod (26) is connected with a transmission motor (25), and the transmission rod (26) is fixedly provided with transmission paddles (27) at equal intervals.

3. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 1, characterized in that, The upper part of the barrel structure (23) is fixedly provided with a cover body structure (21), the bottom wall of the inner cavity of the cover body structure (21) is fixedly provided with a waterproof shell (24), and the waterproof shell (24) is sleeved on the transmission motor (25).

4. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 3, characterized in that, The cover body structure (21) is fixedly provided with a protective wire pipe (22), the external connecting line of the transmission motor (25) penetrates in the protective wire pipe (22), and the output shaft of the transmission motor (25) penetrates the waterproof shell (24) and the transmission rod (26) and is fixed.

5. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 1, characterized in that, The collecting pipe (28) is detachably connected with a first pump (6) and a second pump (7), the output end of the first pump (6) is in communication with the inner cavity of the collecting pipe (28), and the output end of the second pump (7) is in communication with the receiving end of the water receiving pipe (94).

6. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 3, characterized in that, The cover body structure (21) is fixedly connected with an external discharge pipe (29), the part, opposite to the flow guide part (95), of the bottom wall of the inner cavity of the barrel structure (23) is provided with a round corner, and the water guide ring (8) is in a ring structure.

7. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 1, characterized in that, The water guide ring (8) is in a ring structure with an inner side arched upward, the upper part of the water spraying hole (82) is provided with a water distribution chamfer (83), and the water distribution chamfer (83) is a chamfer provided on the upper part of the water spraying hole (82).

8. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 5, characterized in that, The receiving end of the second pump (7) is connected with a discharge end of a filtering structure (1), the second pump (7) is detachably connected on a frame body of the filtering structure (1), and the water receiving pipe (94) is in an L-shaped tubular structure.

9. The multi-stage desulfurization treatment device for chemical engineering wastewater according to claim 1, characterized in that, The filtering structure (1) is detachably connected with the first pump (6) and the second pump (7), the filtering structure (1) is detachably connected with the transmission motor (25), the filtering structure (1) is detachably connected with the water guide ring (8), the filtering structure (1) is detachably connected with the water spraying cavity (9), the filtering structure (1) is detachably connected with the water collecting pipe (97), the filtering structure (1) is detachably connected with the water receiving pipe (94), and the filtering structure (1) is detachably connected with the external discharge pipe (29). The filtering structure (1) is detachably connected with the first pump (6) and the second pump (7), the filtering structure (1) is detachably connected with the transmission motor (25), the filtering structure (1) is detachably connected with the water guide ring (8), the filtering structure (1) is detachably connected with the water spraying cavity (9), the filtering structure (1) is detachably connected with the water collecting pipe (97), the filtering structure (1) is detachably connected with the water receiving pipe (94), and the filtering structure (1) is detachably connected with the external discharge pipe (29).

10. A multi-stage desulfurization process for chemical engineering wastewater, the process being applied to the multi-stage desulfurization treatment apparatus for chemical engineering wastewater according to claim 9, characterized by, It comprises the following steps: Step one, filtering, the chemical wastewater is added to the inside of the filter structure (1) in advance, and the wastewater filtered by the filter structure (1) is discharged into the inside of the water spraying cavity (9); Step two, mixing, a certain amount of lime water is added to the inside of the collecting pipe (28), the lime water and the wastewater sprayed from the water spraying cavity (9) are mixed by the mixing paddle (93), the chemical wastewater with a suitable PH value is obtained, the lime water is stirred and rolled by the spoiler paddle (91), and the lumps in the lime water are divided into small particles; Step three, shunt mixing, the lime water and the chemical wastewater in the inside of the barrel structure (23) are stirred by the water guide ring (8) and the spoiler paddle (91), the mixed lime water and the chemical wastewater are guided by the water guide ring (8), and the mixed lime water and the chemical wastewater are discharged in a concentrated manner; Step four, flocculation, a certain amount of flocculating agent is added to the inside of the barrel structure (23), the flocculating agent contacts the chemical wastewater guided in a concentrated manner by the water guide ring (8), and the flocculating body is formed in the inside of the barrel structure (23); Step five, multi-stage treatment, the flocculated chemical wastewater in the inside of the barrel structure (23) is discharged into the inside of the pressure filtration equipment (3) through the discharge pipe (29) for pressure filtration treatment, the chemical wastewater treated by the pressure filtration equipment (3) is treated again in the inside of the reverse osmosis separation equipment (4), and the chemical wastewater treated by the reverse osmosis separation equipment (4) is treated by desulfurization in the inside of the desulfurization equipment (5).

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