Elementary sulfur recovery equipment for sulfur-containing wastewater

Abstract

The utility model discloses elemental sulfur recovery equipment for sulfur-containing wastewater, which relates to the technical field of wastewater treatment and comprises a radial flow sedimentation tank and a dosing bin, a dosing frame is connected inside the dosing bin, a through hole and a push plate are respectively arranged on the outer surface of the dosing frame, and a framework is fixed inside the dosing frame. Through the arrangement of the dosing bin, the waste water pipe, the dosing frame, the through hole and the push plate, waste water enters the dosing bin along the tangent line through the waste water pipe, so that the waste water generates vortex when flowing in the dosing bin, and the waste water vortex applies force to the push plate, so that the dosing frame starts to rotate; during the period, an external metering pump feeds a certain amount of flocculating agent into the dosing frame through a rotary joint; the device is simple in structure, convenient to use and free of extra electric power, compared with a traditional mode that multiple metering pumps are used for multi-point dosing, pipelines, signal lines, cables and metering pumps are reduced, compared with a single metering pump, the device is more uniform in flocculant dispersion, the cost is effectively reduced, and the device is suitable for manufacturers sensitive to the cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a sulfur recovery device for sulfur-containing wastewater. Background Technology

[0002] Sulfides in wastewater are oxidized to produce elemental sulfur, an intermediate product. Recovering elemental sulfur not only helps with resource utilization but also prevents sulfides from causing equipment blockage and secondary pollution during subsequent wastewater treatment.

[0003] After sulfur-containing wastewater is treated to produce elemental sulfur, the elemental sulfur is usually recovered using physical, chemical, or biological methods. Physical methods typically involve separating elemental sulfur from the wastewater through gravity sedimentation or centrifugation. Then, the water content of the elemental sulfur is reduced by filtration equipment such as plate and frame filters to form a sulfur filter cake, thereby efficiently recovering elemental sulfur.

[0004] When separating elemental sulfur from wastewater through gravity sedimentation or centrifugation, flocculants are usually added beforehand to allow the elemental sulfur to combine and form large particles, making it easier to separate from the wastewater. Current technologies typically automate the addition of flocculants, using online monitoring systems to detect wastewater composition and flow rate, calculate the dosage, and then add a measured amount of flocculant to the wastewater via metering pumps. To ensure more uniform dosing, improve flocculant efficiency, and avoid localized overdose, existing technologies often employ multi-point dosing, using multiple metering pumps to simultaneously add flocculants to multiple points along the wastewater flow. This dosing method results in complex piping and wiring, and the increased number of metering pumps required as the water flow cross-section increases, leading to higher costs. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a sulfur recovery device for sulfur-containing wastewater to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sulfur element recovery device for sulfur-containing wastewater, comprising a radial flow sedimentation tank and a dosing chamber, wherein a dosing rack is connected inside the dosing chamber, and the outer surface of the dosing rack is respectively provided with through holes and push plates, a frame is fixed inside the dosing rack, a rotary joint is connected to the top of the dosing rack, and a wastewater pipe and a water supply pipe are respectively connected to both sides of the dosing chamber.

[0007] By adopting the above technical solution, the wastewater after oxidation treatment enters the dosing chamber tangentially through the wastewater pipe. As the wastewater flows inside the dosing chamber, it generates vortices. These vortices exert force on the push plate, causing the dosing rack to rotate. Simultaneously, the hollow structure of the dosing rack reduces its weight, while the frame reinforces its structural strength, preventing the wastewater from failing to drive the rack's rotation and preventing deformation. During the rack's rotation, an external metering pump delivers a measured amount of flocculant into the dosing rack via a rotary joint. The centrifugal force generated by the rack's rotation separates and throws the flocculant out through the through-holes, increasing the contact area between the wastewater and the flocculant, resulting in more uniform dosing and preventing localized flocculant concentration.

[0008] Furthermore, the wastewater pipe is tangent to the dosing chamber.

[0009] By adopting the above technical solution, the wastewater after oxidation treatment enters the dosing chamber tangentially through the wastewater pipe, causing the wastewater to generate vortices when flowing inside the dosing chamber. The wastewater vortex exerts force on the push plate, causing the dosing rack to start rotating.

[0010] Furthermore, the inside of the dosing rack is hollow.

[0011] By adopting the above technical solution, the hollow structure of the dosing rack reduces the structural weight, while the frame strengthens the structural strength of the dosing rack, preventing the wastewater from failing to drive the dosing rack to rotate and preventing the dosing rack from deforming.

[0012] Furthermore, the dosing rack, frame, and push plate are all made of 316L stainless steel.

[0013] By adopting the above technical solutions, the dosing rack, frame and push plate made of 316L stainless steel have excellent corrosion resistance and can effectively avoid corrosion of the structure caused by elemental sulfur and wastewater.

[0014] Furthermore, the through holes are provided in multiple ways, and the multiple through holes are distributed in a ring array.

[0015] By adopting the above technical solution and increasing the number of through holes, the dosing area is increased, allowing the flocculant to be evenly dispersed into the surrounding wastewater vortex.

[0016] Furthermore, the longitudinal section of the pusher plate is semi-circular, and multiple pushers are provided, which are distributed in a ring array.

[0017] By adopting the above technical solution, the shape of the push plate increases the resistance, making it easier for wastewater to push the push plate and rotate the dosing rack. Increasing the number of push plates further facilitates the rotation of the dosing rack.

[0018] Furthermore, an inlet pipe is connected to the upper side of one side of the radial flow sedimentation tank, a scum pipe is connected to the upper side of the other side of the radial flow sedimentation tank, a sedimentation pipe is connected to the lower side of the other side of the radial flow sedimentation tank, and a drain pipe is connected to the upper surface of the outer surface of the radial flow sedimentation tank.

[0019] By adopting the above technical solution, wastewater settles in a radial flow sedimentation tank, causing solid particles in the wastewater to float or sink. The floating scum is sent to the scum pipe for discharge by the skimming mechanism in the radial flow sedimentation tank, while the sinking solid particles are sent to the settling pipe for discharge by the scum hanging mechanism in the radial flow sedimentation tank. The settled wastewater is discharged from the drain pipe by overflow. The settling pipe sends sludge containing elemental sulfur into a plate and frame filter press for filtration to obtain a filter cake containing elemental sulfur, which is then recovered through a series of recovery processes.

[0020] Furthermore, a wastewater pump is installed between the inlet pipe and the outlet pipe.

[0021] By adopting the above technical solution, the wastewater pump extracts the wastewater with added flocculant through the water delivery pipe, and pumps the wastewater with added flocculant into the radial sedimentation tank through the water inlet pipe.

[0022] Furthermore, the top of the dosing chamber is connected to an organic seal, and the dosing rack is connected to the organic seal.

[0023] By adopting the above technical solution, the area at the top of the dosing chamber that is penetrated by the dosing rack is sealed by mechanical sealing, thus preventing wastewater from seeping out from the top of the dosing chamber and causing pollution.

[0024] In summary, the present invention has the following main advantages:

[0025] This invention utilizes a dosing chamber, wastewater pipe, dosing rack, through-holes, and push plate. Wastewater enters the dosing chamber tangentially through the wastewater pipe, creating vortices as it flows within. These vortices exert force on the push plate, causing the dosing rack to rotate. During this process, an external metering pump delivers a measured amount of flocculant into the dosing rack via a rotary joint. The centrifugal force generated by the rotating rack separates and ejects the flocculant through the through-holes, increasing the contact area between the wastewater and the flocculant, resulting in more uniform dosing and preventing localized flocculant concentration. Simultaneously, the hollow structure of the dosing rack reduces structural weight, while the frame reinforces its structural strength, preventing the wastewater from failing to propel the rack and preventing rack deformation. The design is simple, easy to use, and requires no additional electricity. Compared to traditional multi-metering pumps for multi-point dosing, it reduces the need for piping, signal lines, cables, and metering pumps. Compared to a single metering pump, it provides more uniform flocculant dispersion, effectively reducing costs and making it suitable for cost-sensitive manufacturers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the dosing chamber structure of this utility model;

[0028] Figure 3 This is a schematic cross-sectional view of the dosing chamber of this utility model;

[0029] Figure 4 This is a bottom view of the structure of the drug dispensing rack of this utility model.

[0030] In the diagram: 1. Radial flow sedimentation tank; 2. Dosing chamber; 3. Wastewater pump; 4. Inlet pipe; 5. Drain pipe; 6. Scum pipe; 7. Sediment pipe; 8. Wastewater pipe; 9. Water supply pipe; 10. Mechanical seal; 11. Rotary joint; 12. Dosing rack; 13. Skeleton; 14. Through hole; 15. Push plate. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] The embodiments of this utility model will be described below based on its overall structure.

[0033] Example 1: A sulfur recovery device for sulfur-containing wastewater, such as... Figures 1-4 As shown, the system includes a radial sedimentation tank 1 and a dosing chamber 2. A dosing rack 12 is connected inside the dosing chamber 2. The dosing rack 12 is hollow inside, and its outer surface is provided with through holes 14 and push plates 15. Multiple through holes 14 are arranged in a ring array. Multiple push plates 15 have a semi-circular longitudinal section and are also arranged in a ring array. A frame 13 is fixed inside the dosing rack 12. The dosing rack 12, frame 13, and push plates 15 are all made of 316L stainless steel. A rotary joint 11 is connected to the top of the dosing rack 12. Wastewater pipes 8 and water supply pipes 9 are connected to both sides of the dosing chamber 2, respectively. The wastewater pipes 8 are tangent to the dosing chamber 2. After oxidation treatment... Wastewater enters the dosing chamber 2 tangentially through wastewater pipe 8, creating vortices as it flows inside. These vortices exert force on push plate 15, causing dosing rack 12 to rotate. Simultaneously, the hollow structure of dosing rack 12 reduces its weight, while the frame 13 reinforces its structural strength, preventing the wastewater from failing to drive the rack and causing deformation. During rotation, an external metering pump delivers a measured amount of flocculant to the rack 12 via rotary joint 11. The centrifugal force generated by the rotation of dosing rack 12 separates and ejects the flocculant from through holes 14, increasing the contact area between wastewater and flocculant, resulting in more uniform dosing and preventing localized flocculant concentration.

[0034] See Figure 1 In the above embodiment, an inlet pipe 4 is connected to the upper side of one side of the radial flow sedimentation tank 1, a scum pipe 6 is connected to the upper side of the other side of the radial flow sedimentation tank 1, a sedimentation pipe 7 is connected to the lower side of the other side of the radial flow sedimentation tank 1, and a drain pipe 5 is connected to the upper surface of the outer surface of the radial flow sedimentation tank 1. A wastewater pump 3 is installed between the inlet pipe 4 and the delivery pipe 9. The wastewater pump 3 draws wastewater with added flocculant through the delivery pipe 9 and pumps the wastewater with added flocculant into the radial flow sedimentation tank 1 through the inlet pipe 4. The wastewater then undergoes radial flow sedimentation. The solid particles in the wastewater are settled in the radial sedimentation tank 1, causing them to float or sink. The floating scum is sent to the scum pipe 6 by the skimming mechanism in the radial sedimentation tank 1 and discharged, while the sinking solid particles are sent to the scum pipe 7 by the scum hanging mechanism in the radial sedimentation tank 1 and discharged. The settled wastewater is discharged from the drain pipe 5 by overflow. The scum pipe 7 sends the sludge containing elemental sulfur into the plate and frame filter press for filtration to obtain the filter cake containing elemental sulfur. The elemental sulfur is then recovered through a series of recovery processes.

[0035] Example 2: Based on Example 1 above, the following settings are made to prevent water leakage.

[0036] See Figures 1-3 In the above embodiment, the top of the dosing chamber 2 is connected to a mechanical seal 10, and the dosing rack 12 is connected to the mechanical seal 10. The mechanical seal 10 seals the area on the top of the dosing chamber 2 that is penetrated by the dosing rack 12, so as to prevent wastewater from seeping out from the top of the dosing chamber 2 and causing pollution.

[0037] The implementation principle of this utility model is as follows: First, the wastewater after oxidation treatment enters the dosing chamber 2 tangentially through the wastewater pipe 8, causing a vortex to be generated when the wastewater flows inside the dosing chamber 2. The wastewater vortex exerts force on the push plate 15, causing the dosing rack 12 to start rotating. At the same time, the hollow structure of the dosing rack 12 reduces the structural weight, while the frame 13 strengthens the structural strength of the dosing rack 12, preventing the wastewater from being unable to push the dosing rack 12 to rotate and preventing the dosing rack 12 from deforming. During the rotation of the dosing rack 12, an external metering pump delivers a fixed amount of flocculant into the dosing rack 12 through the rotary joint 11. The centrifugal force generated by the rotation of the dosing rack 12 will separate and throw the flocculant out from the through hole 14, increasing the contact area between the wastewater and the flocculant, making the dosing more uniform and avoiding local concentration of flocculant.

[0038] Then, wastewater pump 3 draws wastewater with added flocculant through water delivery pipe 9, and pumps the wastewater with added flocculant into radial flow sedimentation tank 1 through water inlet pipe 4. The wastewater settles in radial flow sedimentation tank 1, causing solid particles in the wastewater to float or sink. The floating scum is sent to the scum pipe 6 by the skimming mechanism in radial flow sedimentation tank 1 and discharged, while the sinking solid particles are sent to the settling pipe 7 by the scum hanging mechanism in radial flow sedimentation tank 1 and discharged. The settled wastewater is discharged from the drain pipe 5 by overflow. The settling pipe 7 sends the sludge containing elemental sulfur into the plate and frame filter press for filtration to obtain filter cake containing elemental sulfur. Then, the elemental sulfur is recovered through a series of recovery processes.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A sulfur recovery device for sulfur-containing wastewater, comprising a radial flow sedimentation tank (1) and a dosing tank (2), characterized in that: The dosing chamber (2) is connected to a dosing rack (12), and the outer surface of the dosing rack (12) is provided with a through hole (14) and a push plate (15). The dosing rack (12) is fixed with a frame (13). The top of the dosing rack (12) is connected to a rotary joint (11). The two sides of the dosing chamber (2) are connected to a wastewater pipe (8) and a water supply pipe (9).

2. The sulfur recovery equipment for sulfur-containing wastewater according to claim 1, characterized in that: The wastewater pipe (8) is tangent to the dosing chamber (2).

3. The sulfur recovery equipment for sulfur-containing wastewater according to claim 2, characterized in that: The dosing rack (12) is hollow inside.

4. The sulfur recovery equipment for sulfur-containing wastewater according to claim 3, characterized in that: The dosing rack (12), frame (13) and push plate (15) are all made of 316L stainless steel.

5. The sulfur recovery equipment for sulfur-containing wastewater according to claim 1, characterized in that: The through holes (14) are provided in multiple ways, and the multiple through holes (14) are distributed in a ring array.

6. The sulfur recovery equipment for sulfur-containing wastewater according to claim 4, characterized in that: The longitudinal section of the push plate (15) is semi-circular, and multiple push plates (15) are provided, which are distributed in a ring array.

7. The sulfur recovery equipment for sulfur-containing wastewater according to claim 1, characterized in that: The radial sedimentation tank (1) is connected to an inlet pipe (4) on one side above the other side, a scum pipe (6) on the other side above the other side, a sedimentation pipe (7) on the other side below the other side, and a drain pipe (5) on the outer surface of the radial sedimentation tank (1).

8. The sulfur recovery equipment for sulfur-containing wastewater according to claim 7, characterized in that: A wastewater pump (3) is installed between the water inlet pipe (4) and the water delivery pipe (9).

9. The sulfur recovery equipment for sulfur-containing wastewater according to claim 1, characterized in that: The top of the dosing chamber (2) is connected to a mechanical seal (10), and the dosing rack (12) is connected to the mechanical seal (10).

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