A reagent mixing device for deep dewatering of sludge from urban wastewater treatment plants

Abstract

This utility model relates to the field of wastewater treatment and sludge disposal technology, and discloses a mixing device for deep dewatering of sludge in urban wastewater treatment plants. The device includes a hollow shell, a top cover slidably connected to the top of the outer wall of the hollow shell, a protective cover fixedly connected to the top of the top cover, a motor fixedly connected to the bottom of the inner wall of the protective cover, a rotating shaft I fixedly connected to the output end of the motor, a bevel gear I fixedly connected to the top of the outer wall of the rotating shaft I, a bevel gear II meshing with the outer wall of the bevel gear I, and a bevel gear III meshing with the outer wall of the bevel gear II. In this utility model, after the motor starts, the rotating shaft I drives the bevel gear I and the stirring paddle III to rotate, and the bevel gear I in turn drives the bevel gear II and the bevel gear III to rotate, thereby causing the rotating shaft II to rotate in the opposite direction to the rotating shaft I. The interaction of stirring forces in different directions causes more complex flow and collision of materials during the mixing process.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment and sludge disposal technology, and in particular to a mixing device for deep dewatering of sludge in urban sewage treatment plants. Background Technology

[0002] Deep sludge dewatering is a crucial step in the sludge disposal process of wastewater treatment plants. It aims to further reduce the moisture content of sludge through physical, chemical, or biological means, lowering it from approximately 80% after conventional mechanical dewatering to below 60%, with some processes achieving 50% or even lower. This process overcomes the limitations of the binding force between water and solid particles in sludge, especially targeting difficult-to-separate interstitial water, surface adsorbed water, and internally bound water. By adding modifying agents to alter the colloidal structure of the sludge and disrupt its stability, combined with deep dewatering equipment such as high-pressure pressing and plate-and-frame filter presses, efficient water removal is achieved. To ensure more thorough mixing of sludge and agents and improve the effectiveness of deep sludge dewatering, a mixing device is needed to quickly, uniformly, and fully mix the sludge and agents, ensuring that the agents can exert their maximum effect.

[0003] In the deep dewatering process of sludge in urban wastewater treatment plants, the reagent mixing device is the core equipment connecting reagent dosing and efficient dewatering. The effectiveness of this device directly affects the subsequent dewatering effect. However, most existing mixing devices only have a single set of stirring paddles to mix sludge and reagents, resulting in poor mixing effect between sludge and reagents, which affects the quality of subsequent sludge dewatering. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a chemical mixing device for deep dewatering of sludge in urban sewage treatment plants, aiming to improve the problem of poor mixing effect of sludge and chemical in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a mixing device for deep dewatering of sludge in urban sewage treatment plants, comprising a hollow shell, a top cover slidably connected to the top of the outer wall of the hollow shell, a protective cover fixedly connected to the top of the top cover, a motor fixedly connected to the bottom of the inner wall of the protective cover, a rotating shaft one fixedly connected to the output end of the motor, a bevel gear one fixedly connected to the top of the outer wall of the rotating shaft one, a bevel gear two meshing with the outer wall of the bevel gear one, a bevel gear three meshing with the outer wall of the bevel gear two, a rotating shaft two fixedly connected to the inner wall of the bevel gear three, a stirring paddle three fixedly connected to the bottom of the outer wall of the rotating shaft one, a stirring paddle two fixedly connected to the bottom of the outer wall of the rotating shaft two, a shear shell fixedly connected to the bottom of the inner wall of the hollow shell, and a stirring mechanism fixedly connected to the bottom of the outer wall of the hollow shell, the stirring mechanism being used to stir the reagents separately.

[0006] As a further description of the above technical solution:

[0007] The stirring mechanism includes a stirring chamber, the top of the outer wall of the stirring chamber is fixedly connected to the bottom of the outer wall of the hollow shell, a stirring paddle is fixedly connected to the bottom of the outer wall of the rotating shaft near the edge, a pipe is connected to the right side of the inner wall of the stirring chamber, a connecting block is fixedly connected to the outer wall of the pipe, a funnel is connected to the top of the pipe, a pipe is connected to the left side of the inner wall of the stirring chamber, a water pump is connected to the top of the pipe, and a pipe is connected to the top of the inner wall of the water pump.

[0008] As a further description of the above technical solution:

[0009] A control box is fixedly connected to the front side of the outer wall of the hollow shell, and a display screen is fixedly connected to the left side of the inner wall of the control box.

[0010] As a further description of the above technical solution:

[0011] A power knob is fixedly connected to the middle of the inner wall of the control box, and an emergency stop button is fixedly connected to the right side of the inner wall of the control box.

[0012] As a further description of the above technical solution:

[0013] A switch is fixedly connected to the bottom of the inner wall of the control box, and multiple fixing sleeves are fixedly connected to the top of the control box.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the fixed sleeve is rotatably connected to a rotating shaft three, and a protective cover is fixedly connected to the outer wall of the rotating shaft three near its edge.

[0016] As a further description of the above technical solution:

[0017] Multiple support columns are fixedly connected to the bottom edge of the outer wall of the hollow shell, and the middle of the outer wall of the first rotating shaft is rotatably connected to the inner wall of the second rotating shaft.

[0018] As a further description of the above technical solution:

[0019] A dust cover is slidably connected to the top of the outer wall of the funnel, and the left side of the funnel is fixedly connected to the right side of the outer wall of the hollow shell.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, after the motor starts, the first rotating shaft drives the first bevel gear and the third stirring paddle to rotate. The first bevel gear then drives the second and third bevel gears to rotate, thereby causing the second rotating shaft to rotate in the opposite direction to the first rotating shaft. The stirring forces in different directions interact, causing the materials to produce more complex flow and collision during the mixing process, allowing the sludge and the agent to come into more thorough contact and mix. At the same time, when the material passes through the shear shell, the holes in it will generate shear force on the material. This shear force can further make the mixing of sludge and the agent more delicate and uniform, thereby improving the overall stirring effect, solving the problem of poor mixing effect of sludge and agent, improving the treatment quality of deep sludge dewatering, and making the treated sludge more compliant with environmental protection requirements and relevant standards.

[0022] 2. In this utility model, the motor drives the rotating shaft to rotate, which in turn causes the stirring paddle to rotate in the stirring chamber. After the agent is added from the funnel, it is fully stirred in the stirring chamber, so that the various components of the agent can be evenly dispersed. This avoids the problem of affecting the treatment effect due to uneven mixing of the agent. This method of stirring before conveying ensures that the agent entering the hollow shell is uniform and can work with the sludge in the best state, thereby giving full play to the performance of the agent. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a mixing device for deep dewatering of sludge in an urban wastewater treatment plant, as proposed in this utility model.

[0024] Figure 2 This is a partial structural breakdown diagram of the mixing chamber of a reagent mixing device for deep dewatering of sludge in an urban wastewater treatment plant, as proposed in this utility model.

[0025] Figure 3 This is a partial structural breakdown of the shear shell of a reagent mixing device for deep dewatering of sludge in an urban wastewater treatment plant, as proposed in this utility model.

[0026] Figure 4 This utility model proposes a reagent mixing device for deep dewatering of sludge from urban wastewater treatment plants. Figure 3 Enlarged view of point A;

[0027] Figure 5 This is a partial structural exploded view of the control box of a chemical mixing device for deep dewatering of sludge in an urban wastewater treatment plant, as proposed in this utility model.

[0028] Legend:

[0029] 1. Hollow shell; 2. Stirring mechanism; 201. Stirring chamber; 202. Stirring paddle one; 203. Funnel; 204. Connecting block; 205. Pipe one; 206. Pipe two; 207. Water pump; 208. Pipe three; 3. Top cover; 4. Motor; 5. Shaft one; 6. Bevel gear one; 7. Bevel gear two; 8. Bevel gear three; 9. Shaft two; 10. Stirring paddle two; 11. Stirring paddle three; 12. Shear shell; 13. Protective cover; 14. Dust cover; 15. Support column; 16. Control box; 17. Display screen; 18. Power knob; 19. Emergency stop button; 20. Switch; 21. Fixing sleeve; 22. Shaft three; 23. Protective cover. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 Appendix Figure 3 and attached Figure 4 An embodiment of this utility model provides a mixing device for deep dewatering of sludge in urban sewage treatment plants, comprising a hollow shell 1, a top cover 3 slidably connected to the top of the outer wall of the hollow shell 1, a protective cover 13 fixedly connected to the top of the top cover 3, a motor 4 fixedly connected to the bottom of the inner wall of the protective cover 13, a rotating shaft 5 fixedly connected to the output end of the motor 4, a bevel gear 6 fixedly connected to the top of the outer wall of the rotating shaft 5, a bevel gear 7 meshing with the outer wall of the bevel gear 6, a bevel gear 8 meshing with the outer wall of the bevel gear 7, a rotating shaft 9 fixedly connected to the inner wall of the bevel gear 8, a stirring paddle 11 fixedly connected to the bottom of the outer wall of the rotating shaft 5, a stirring paddle 10 fixedly connected to the bottom of the outer wall of the rotating shaft 9, a shear shell 12 fixedly connected to the bottom of the inner wall of the hollow shell 1, and a stirring mechanism 2 fixedly connected to the bottom of the outer wall of the hollow shell 1. The stirring mechanism 2 is used to stir the agents separately.

[0032] Specifically, the hollow shell 1 serves as the main frame of the entire mixing device, providing installation space for other components and accommodating the mixing and stirring process of sludge and chemicals. It is the main place for mixing operations. The top cover 3 can cover the hollow shell 1 during mixing operations to prevent sludge and chemicals from splashing out during the stirring process, while also playing a certain sealing role. The shear shell 12 has multiple rectangular holes on its outer wall to shear the passing materials, further improving the mixing effect of sludge and chemicals and making them mix more evenly.

[0033] Please see the appendix Figure 1Appendix Figure 2 and attached Figure 3 The stirring mechanism 2 includes a stirring chamber 201. The top of the outer wall of the stirring chamber 201 is fixedly connected to the bottom of the outer wall of the hollow shell 1. A stirring paddle 202 is fixedly connected to the bottom of the outer wall of the rotating shaft 5 near the edge. A pipe 205 is connected to the right side of the inner wall of the stirring chamber 201. A connecting block 204 is fixedly connected to the outer wall of the pipe 205. A funnel 203 is connected to the top of the pipe 205. A pipe 206 is connected to the left side of the inner wall of the stirring chamber 201. A water pump 207 is connected to the top of the pipe 206. A pipe 3 208 is connected to the top of the inner wall of the water pump 207.

[0034] Specifically, the mixing chamber 201 provides an independent enclosed space for mixing the agent, preventing leakage during the mixing process. The funnel 203 facilitates the addition of the agent, reducing waste. The water pump 207 provides power for the delivery of the agent, enabling it to smoothly enter the hollow shell 1 from the mixing chamber 201. The connecting block 204 serves to fix and support the pipe 205, making the connection of the pipe 205 more stable.

[0035] Please see the appendix Figure 1 and attached Figure 5 A control box 16 is fixedly connected to the front side of the outer wall of the hollow shell 1. A display screen 17 is fixedly connected to the left side of the inner wall of the control box 16. A power knob 18 is fixedly connected to the middle of the inner wall of the control box 16. An emergency stop button 19 is fixedly connected to the right side of the inner wall of the control box 16. A switch 20 is fixedly connected to the bottom of the inner wall of the control box 16. Multiple fixing sleeves 21 are fixedly connected to the top of the control box 16. A rotating shaft 22 is rotatably connected to the inner wall of the fixing sleeve 21. A protective cover 23 is fixedly connected to the outer wall of the rotating shaft 22 near the edge.

[0036] Specifically, the display screen 17 can display the operating parameters of the device in real time, making it convenient for staff to understand the operating status of the device. The power knob 18 is used to adjust the power of the motor 4, thereby changing the rotation speed of the mixing paddle to meet the mixing needs of different sludge and agents. When an abnormal situation occurs during the operation of the device, the staff can press the emergency stop button 19 to quickly stop the operation of the motor 4 and ensure the safety of the equipment and personnel.

[0037] Please see the appendix Figure 1 and attached Figure 2 Multiple support columns 15 are fixedly connected to the bottom edge of the outer wall of the hollow shell 1. The middle of the outer wall of the first rotating shaft 5 is rotatably connected to the inner wall of the second rotating shaft 9. A dust cover 14 is slidably connected to the top of the outer wall of the funnel 203. The left side of the funnel 203 is fixedly connected to the right side of the outer wall of the hollow shell 1.

[0038] Specifically, the support column 15 supports the entire device, allowing it to be placed stably on the ground and preventing it from tilting or shaking. The dust cover 14 prevents dust and impurities from entering the funnel 203 and the mixing chamber 201, ensuring the purity of the reagent.

[0039] Working principle: When the operator needs to mix sludge and chemicals, the motor 4 can be turned on. The motor 4 drives the bevel gear 6 and the stirring paddle 11 to rotate through the rotating shaft 5. The bevel gear 6 drives the bevel gear 7 and the bevel gear 8 to rotate. Through the transmission of the bevel gear 7 and the bevel gear 8, the rotating shaft 9 will rotate in the opposite direction to the rotating shaft 5. Therefore, the stirring paddles 10 and 11 can rotate in opposite directions to fully mix the materials. At the same time, the holes on the shear shell 12 can shear the materials to improve the mixing effect.

[0040] If the agent is not fully mixed and added directly to the sludge to be treated, the agent may not be fully effective. In this case, the operator can first turn on the motor 4 to drive the rotating shaft 5 to rotate, which in turn drives the stirring paddle 202 to rotate. When the agent is added from the funnel 203, the agent is stirred in the stirring chamber 201 and enters the hollow shell 1 along the pipe 206 and the pipe 3 208 under the action of the water pump 207.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A medicament mixing device for advanced dewatering of sludge from a municipal sewage treatment plant, comprising a hollow housing (1), characterized in that: A top cover (3) is slidably connected to the top of the outer wall of the hollow shell (1). A protective cover (13) is fixedly connected to the top of the top cover (3). A motor (4) is fixedly connected to the bottom of the inner wall of the protective cover (13). A rotating shaft (5) is fixedly connected to the output end of the motor (4). A bevel gear (6) is fixedly connected to the top of the outer wall of the rotating shaft (5). A bevel gear (7) is meshed with the outer wall of the bevel gear (6). A bevel gear three (8) is connected, and a rotating shaft two (9) is fixedly connected to the inner wall of the bevel gear three (8). A stirring paddle three (11) is fixedly connected to the bottom of the outer wall of the rotating shaft one (5). A stirring paddle two (10) is fixedly connected to the bottom of the outer wall of the rotating shaft two (9). A shear shell (12) is fixedly connected to the bottom of the inner wall of the hollow shell (1). A stirring mechanism (2) is fixedly connected to the bottom of the outer wall of the hollow shell (1). The stirring mechanism (2) is used to stir the medicine separately.

2. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 1, characterized in that: The stirring mechanism (2) includes a stirring chamber (201). The top of the outer wall of the stirring chamber (201) is fixedly connected to the bottom of the outer wall of the hollow shell (1). The bottom of the outer wall of the rotating shaft (5) is fixedly connected to a stirring paddle (202). The right side of the inner wall of the stirring chamber (201) is connected to a pipe (205). The outer wall of the pipe (205) is fixedly connected to a connecting block (204). The top of the pipe (205) is connected to a funnel (203). The left side of the inner wall of the stirring chamber (201) is connected to a pipe (206). The top of the pipe (206) is connected to a water pump (207). The top of the inner wall of the water pump (207) is connected to a pipe (208).

3. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 1, characterized in that: A control box (16) is fixedly connected to the front side of the outer wall of the hollow shell (1), and a display screen (17) is fixedly connected to the left side of the inner wall of the control box (16).

4. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 3, characterized in that: A power knob (18) is fixedly connected to the middle of the inner wall of the control box (16), and an emergency stop button (19) is fixedly connected to the right side of the inner wall of the control box (16).

5. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 3, characterized in that: A switch (20) is fixedly connected to the bottom of the inner wall of the control box (16), and multiple fixing sleeves (21) are fixedly connected to the top of the control box (16).

6. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 5, characterized in that: The inner wall of the fixed sleeve (21) is rotatably connected to a rotating shaft three (22), and a protective cover (23) is fixedly connected to the outer wall of the rotating shaft three (22) near the edge.

7. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 1, characterized in that: Multiple support columns (15) are fixedly connected to the bottom edge of the outer wall of the hollow shell (1), and the middle part of the outer wall of the first rotating shaft (5) is rotatably connected to the inner wall of the second rotating shaft (9).

8. The agent mixing device for advanced dewatering of sludge from a municipal sewage treatment plant according to claim 2, characterized in that: A dust cover (14) is slidably connected to the top of the outer wall of the funnel (203), and the left side of the funnel (203) is fixedly connected to the right side of the outer wall of the hollow shell (1).

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