A lime wet method dosing cloth pulp device for sewage treatment

Abstract

The utility model relates to a kind of lime wet-process slurry distribution device for sewage treatment, and it relates to sewage treatment technical field, including pedestal, and slurry distribution box is installed on heightening frame, first adding inner cavity, second adding inner cavity are provided in slurry distribution box, the top of slurry distribution box is provided with first adding pipe, second adding pipe;The side of slurry distribution box is provided with water inlet pipe, first water pipe, second water pipe that are interconnected are provided between first adding inner cavity and second adding inner cavity, and the top of slurry distribution box is fixedly installed with the water suction pump that is interconnected with second adding inner cavity, and the water outlet end of water suction pump is connected with water outlet pipe.The utility model divides traditional single violent reaction into two reaction stages, effectively avoids the stubborn deposit such as a large amount of excess calcium carbonate due to local alkalinity is too high, while ensuring the treatment effect, significantly reduce the consumption of lime slurry, and reduce the fouling risk of subsequent pipeline and equipment from the source.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and specifically discloses a lime wet dosing and slurry distribution device for wastewater treatment. Background Technology

[0002] Currently, wet lime treatment is widely used for wastewater treatment, primarily due to its high efficiency, economy, and multi-functional advantages. Lime reacts with phosphate ions in wastewater to form precipitates, achieving deep phosphorus removal and effectively curbing eutrophication. Furthermore, lime slurry also demulsifies and coagulates suspended solids, significantly improving sludge settling and dewatering performance. Compared to other chemical agents, lime has a wide availability of raw materials, low cost, and a stable and reliable treatment process, making it particularly suitable for treating complex industrial wastewater and municipal sewage.

[0003] In existing wet lime dosing technologies for wastewater treatment, a crude method of directly adding lime slurry in a single step is commonly used. This method has significant technical drawbacks. The existing dosing method easily causes excessively high local pH levels, forcing the system to add excessive lime to ensure overall reaction efficiency. This not only directly wastes reagents and significantly increases treatment costs, but also generates a large amount of excess precipitate (mostly calcium carbonate and some reaction byproducts) due to the reaction of excess lime with the hardness and impurities in the water. These stubborn precipitates continuously scale up the reaction tank, pipes, pumps, and the inner walls of subsequent treatment units, severely reducing heat and mass transfer efficiency, accelerating equipment wear, ultimately leading to decreased system processing capacity, increased energy consumption, and a significant increase in the frequency and cost of equipment maintenance and cleaning. Utility Model Content

[0004] In view of the problems of excessive waste of lime slurry and high equipment wear in the current lime wet treatment of sewage, this utility model provides a lime wet dosing and distributing device for sewage treatment.

[0005] To solve the above problems, this utility model provides the following technical solution: A lime wet dosing and slurry distribution device for wastewater treatment includes a base with a guide groove in the middle and a riser frame and a base on both sides of the guide groove. A slurry distribution box is fixedly installed on the riser frame. The slurry distribution box has a first dosing cavity and a second dosing cavity. A first dosing pipe and a second dosing pipe are installed on the top of the slurry distribution box. The first dosing pipe and the second dosing pipe are used to deliver lime slurry into the first dosing cavity and the second dosing cavity, respectively. A wastewater inlet pipe is provided on the side of the slurry distribution box and is connected to the first dosing cavity. A first water passage pipe and a second water passage pipe are connected between the first dosing cavity and the second dosing cavity. A water pump connected to the second dosing cavity is fixedly installed on the top of the slurry distribution box. The outlet end of the water pump is connected to an outlet pipe, and the outlet end of the outlet pipe is arranged in the guide groove.

[0006] Preferably, a triangular bracket is fixedly installed on the side of the pulp distribution box, and a primary water flow equalizer and a secondary water flow equalizer are fixedly installed on the triangular bracket. The primary water flow equalizer and the secondary water flow equalizer are both arranged on the inlet pipe.

[0007] Preferably, a primary centrifugal pump is fixedly installed on the base, the primary centrifugal pump is arranged on the water inlet pipe, a first shut-off valve is fixedly installed on the water outlet pipe, and the water outlet of the water inlet pipe is arranged at the top of the first dosing cavity.

[0008] Preferably, multiple secondary centrifugal pumps are fixedly installed on the base. The first water pipe is provided with multiple diversion ports, and each diversion port is connected to the inlet of each secondary centrifugal pump through a diversion pipe. The outlet of each secondary centrifugal pump is connected to a manifold. The outlet of the manifold is connected to a second water pipe. The outlet of the second water pipe is arranged at the top of the second dosing cavity.

[0009] Preferably, a second shut-off valve is fixedly installed at the outlet end of each secondary centrifugal pump, and a third shut-off valve is fixedly installed on the outlet end of the second water pipe.

[0010] Preferably, a vertically arranged U-shaped tube is provided on the side of the pulping box, and both ends of the U-shaped tube are connected to the second feeding cavity. A set frame is provided around the U-shaped tube. The set frame is made of transparent material, and a vertically arranged ruler is provided on the side of the set frame.

[0011] Preferably, an overflow pipe is connected to the top side of the slurry distribution box, the water inlet end of the overflow pipe is arranged at a height higher than the water inlet end of the water pump, and the water outlet end of the overflow pipe is arranged in the guide groove.

[0012] Preferably, the lime slurry delivered by the first dosing pipe has a saturation of 100%, and the lime slurry delivered by the second dosing pipe has a saturation of 10%.

[0013] Preferably, the bottom of the slurry distribution box is provided with a first drain pipe and a second drain pipe, which are respectively connected to the bottom of the first feeding chamber and the second feeding chamber.

[0014] Preferably, the side of the pulping box is equipped with multiple boxes.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model sets up a first dosing chamber and a second dosing chamber separated by a partition in the slurry distribution tank, and each is equipped with an independent first dosing pipe and a second dosing pipe. This structural layout allows saturated lime slurry to be accurately added to the first dosing chamber, where its strong alkalinity quickly completes the main reactions such as neutralizing acidity, precipitating heavy metals, and efficiently removing phosphorus, ensuring the core treatment effect. Unsaturated lime slurry is then sent to the second dosing chamber, splitting the traditional single violent reaction into two reaction stages. The weakly alkaline environment of the second dosing chamber is dedicated to pH fine-tuning and coagulation aid, effectively avoiding the generation of a large amount of excess calcium carbonate and other stubborn precipitates due to excessively high local alkalinity. While ensuring the treatment effect, it significantly reduces the consumption of lime slurry and reduces the risk of scaling in subsequent pipelines and equipment from the source. 2. The primary water equalizer in this utility model is responsible for significantly reducing the impact of instantaneous flow and completing the initial buffer. By setting the secondary water equalizer, a deeper compensation is carried out on this basis, and finally the unstable sewage inflow is transformed into a highly constant sewage flow, creating stable hydraulic conditions for subsequent chemical dosing. 3. This utility model uses a lifting system consisting of a primary centrifugal pump and a secondary centrifugal pump to sequentially send stable wastewater into the first and second dosing chambers. This structural layout not only rationally allocates the head and optimizes the efficiency of a single pump, but also responds quickly when a single centrifugal pump fails, ensuring that the wastewater flows continuously and stably throughout the device. This ensures that the lime slurry and wastewater can complete a full and uniform reaction in the first and second dosing chambers, respectively. 4. This utility model has an overflow pipe installed at the top of the slurry distribution tank, with its inlet end higher than the inlet end of the suction pump, forming a passive safety barrier. It can automatically overflow when the liquid level rises abnormally, effectively preventing the inner cavity from overflowing. At the same time, in terms of maintenance, the first and second drain pipes installed at the bottom of the slurry distribution tank can facilitate the complete drainage of accumulated liquid and sediment during maintenance, improving the safety and maintainability of the overall device and extending the service life of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall device structure of this utility model; Figure 2 This is a schematic diagram of the arrangement structure of the pulp distribution box of this utility model; Figure 3 This is a schematic diagram of the internal structure of the pulp distribution box of this utility model; Figure 4 This is a schematic diagram of the U-shaped tube installation structure of this utility model; Figure 5 This is a schematic diagram of the installation structure of the first water pipe and the second water pipe of this utility model. In the diagram: 1. Base, 2. Guide groove, 3. Elevator frame, 4. Base, 5. Slurry distribution box, 6. First feeding chamber, 7. Second feeding chamber, 8. First feeding pipe, 9. Second feeding pipe, 10. Inlet pipe, 11. First water passage pipe, 12. Second water passage pipe, 13. Suction pump, 14. Outlet pipe, 15. Triangular bracket, 16. Primary water flow equalizer, 17. Secondary water flow equalizer, 18. Primary centrifugal pump, 19. First shut-off valve, 20. Secondary centrifugal pump, 21. Diverter pipe, 22. Manifold pipe, 23. Second shut-off valve, 24. Third shut-off valve, 25. U-shaped pipe, 26. Set frame, 27. Scale, 28. Overflow pipe, 29. First drain pipe, 30. Second drain pipe, 31. Box door. Detailed Implementation

[0017] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] This specific embodiment provides a lime wet dosing and slurry distribution device for wastewater treatment, such as... Figures 1-5As shown, the device includes a base 1, which serves as the foundation for the overall slurry distribution device, facilitating its placement in the wastewater treatment area. An extension frame 3 and a base 4 are fixedly installed on the base 1. A slurry distribution tank 5 is fixedly installed on the top of the extension frame 3. A primary centrifugal pump 18 and three parallel secondary centrifugal pumps 20 are installed on the base 4. The slurry distribution tank 5 is positioned at a height higher than both the primary and secondary centrifugal pumps 18 and 20.

[0019] A triangular bracket 15 is fixedly installed on the side of the slurry distribution tank 5. A primary water flow equalizer 16 and a secondary water flow equalizer 17 are fixedly installed on the triangular bracket 15. The primary water flow equalizer 16 and the secondary water flow equalizer 17 are arranged in series, and both the primary water flow equalizer 16 and the secondary water flow equalizer 17 are arranged on the inlet pipe 10. The inlet pipe 10 can be connected to the sewage discharge equipment, so that the sewage can enter the inlet pipe 10. The sewage can pass through the primary water flow equalizer 16 and the secondary water flow equalizer 17 in sequence. By setting the primary water flow equalizer 16, large instantaneous flow impacts can be initially smoothed and valleys can be filled, avoiding the impact of violent fluctuations in hydraulic load on subsequent treatment units. By setting the secondary water flow equalizer 17, the flow velocity and pressure can be further stabilized, ensuring that the sewage flow remains highly constant. The above-mentioned hierarchical and coordinated structural layout can significantly improve the overall hydraulic stability of the device.

[0020] The primary centrifugal pump 18 is arranged on the inlet pipe 10 and at the rear end of the secondary water equalizer 17. The slurry distribution box 5 has a first dosing chamber 6 and a second dosing chamber 7, with a partition between them to form two independent internal spaces. A first shut-off valve 19 is fixedly installed on the outlet end of the inlet pipe 10, and the outlet end of the inlet pipe 10 is located at the top of the first dosing chamber 6, facilitating the discharge of wastewater into the first dosing chamber 6 of the slurry distribution box 5.

[0021] The first dosing cavity 6 is externally connected to a first water pipe 11, the inlet of which is positioned at a height lower than that of the first shut-off valve 19. The bottom of the first water pipe 11 is horizontally positioned and has multiple branch outlets. Each branch outlet is connected to the inlet of each secondary centrifugal pump 20 via a branch pipe 21. The outlet of each secondary centrifugal pump 20 is connected to a manifold 22. A second shut-off valve 23 is fixedly installed at the outlet of each secondary centrifugal pump 20. The outlet of the manifold 22 is connected to a second water pipe 12. The outlet of the second water pipe 12 is positioned at the top of the second dosing cavity 7. A third shut-off valve 24 is fixedly installed on the outlet of the second water pipe 12. By setting up a primary centrifugal pump 18, wastewater can be transported to the first dosing chamber above. Each secondary centrifugal pump 20, based on the lifting effect of the primary centrifugal pump 18, undertakes the task of pressurizing and transporting to the subsequent stages. The above-mentioned hierarchical arrangement not only rationally allocates the head requirements and optimizes the operating efficiency of individual centrifugal pumps, but also allows for rapid switching when a centrifugal pump fails, ensuring the continuous and stable operation of the entire device and effectively improving the operational reliability of the entire device.

[0022] The top of the slurry distribution box 5 is provided with a first dosing pipe 8 and a second dosing pipe 9. The bottom ends of the first dosing pipe 8 and the second dosing pipe 9 are respectively arranged in the first dosing cavity 6 and the second dosing cavity 7. The lime slurry delivered in the first dosing pipe 8 has a saturation of 100%, and the lime slurry delivered in the second dosing pipe 9 has a saturation of 10%. The lime slurry in the first dosing pipe 8 is a saturated solution with a pH value between 12.25 and 12.45, while the lime slurry in the second dosing pipe 9 is an unsaturated solution with a pH value between 11.15 and 11.35. Thus, the two types of lime slurry with different pH values ​​are respectively delivered to the wastewater in the first dosing cavity 6 and the second dosing cavity 7. The above-described arrangement achieves precise pH gradient control and reaction stage optimization by adding lime slurry with different saturations to separate chambers. Saturated lime slurry is added to the first addition chamber 6, where its high alkalinity and high reactivity rapidly complete the main reactions such as neutralization, heavy metal precipitation, and efficient phosphorus removal. Unsaturated lime slurry is added to the second addition chamber 7 for fine pH adjustment and coagulation aid. Its mild chemical environment promotes floc growth and improves sedimentation performance, while effectively preventing excessive precipitation caused by local over-alkaliness. Ultimately, this improves treatment efficiency while significantly reducing reagent consumption and scaling risk.

[0023] The distribution tank 5 has a vertically arranged U-shaped tube 25 on its side, with both ends of the U-shaped tube 25 connected to the second dosing cavity 7. A transparent frame 26 is installed around the U-shaped tube 25, and a vertically arranged scale 27 is located on its side. The U-shaped tube 25 allows for real-time monitoring of the actual liquid level in the second dosing cavity 7. The transparent frame 26 and scale 27 facilitate direct and clear observation of the liquid level by the operator, enabling accurate judgment of the cavity's operating status and dosing effect. This provides immediate and reliable visual information for process adjustments, ensuring the stability and controllability of the secondary dosing process.

[0024] A water pump 13, connected to the second dosing chamber 7, is fixedly installed on the top of the slurry distribution tank 5. The outlet end of the water pump 13 is connected to an outlet pipe 14, which is positioned in a guide groove 2 to facilitate the discharge of pre-treated wastewater from the slurry distribution tank 5. Furthermore, an overflow pipe 28 is connected to the top side of the slurry distribution tank 5. The inlet end of the overflow pipe 28 is positioned higher than the inlet end of the water pump 13, and the outlet end of the overflow pipe 28 is positioned in the guide groove 2. When the liquid level in the second dosing chamber 7 rises abnormally due to a sudden change in the inlet flow rate or a pump malfunction, the overflow pipe 28 immediately directs the excess wastewater exceeding the design level into the guide groove 2, effectively preventing overflow accidents in the second dosing chamber 7 and ensuring the structural safety of the tank and the cleanliness of the surrounding operating environment.

[0025] The bottom of the slurry distribution tank 5 is equipped with a first drain pipe 29 and a second drain pipe 30, which are respectively connected to the bottom of the first dosing chamber 6 and the second dosing chamber 7. During cleaning and maintenance of the entire device, clean water can be supplied to the slurry distribution tank 5 through the inlet pipe 10 to flush away excess sediment in the first dosing chamber 6 and the second dosing chamber 7, thereby ensuring the flow rate of wastewater within the entire device.

[0026] In addition, the side of the pulping box 5 is equipped with multiple boxes 31, which facilitates emergency maintenance by staff.

[0027] The working principle of this utility model is as follows: Wastewater is first transported to the first dosing chamber 6 of the slurry distribution tank 5 via a series of primary and secondary water equalizers 16 and 17. Saturated lime slurry is then added to the first dosing chamber 6 through the first dosing pipe 8, enabling rapid neutralization, heavy metal precipitation, and efficient phosphorus removal. Subsequently, the wastewater is pressurized and transported to the second dosing chamber 7 by a secondary centrifugal pump 20, where it is mixed with unsaturated lime slurry for fine-tuning of pH and coagulation aid, optimizing floc formation and settling performance. Finally, the wastewater, after slurry distribution, is discharged by the suction pump 13; simultaneously, the overflow pipe 28 provides a level safety guarantee, thus achieving a staged, efficient, and stable wet lime dosing and reaction process.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lime wet dosing and slurry application device for sewage treatment, comprising a base (1), characterized in that, A guide groove (2) is provided in the middle of the base (1), and a heightening frame (3) and a base (4) are respectively provided on both sides of the guide groove (2); a slurry distribution box (5) is fixedly installed on the heightening frame (3), and a first feeding cavity (6) and a second feeding cavity (7) are provided inside the slurry distribution box (5). A first feeding pipe (8) and a second feeding pipe (9) are provided on the top of the slurry distribution box (5). The first feeding pipe (8) and the second feeding pipe (9) are respectively used to feed lime slurry into the first feeding cavity (6) and the second feeding cavity (7); The side of the pulping tank (5) is provided with an inlet pipe (10) for sewage flow. The inlet pipe (10) is connected to the first feeding chamber (6). The first feeding chamber (6) and the second feeding chamber (7) are connected by a first water pipe (11) and a second water pipe (12). The top of the pulping tank (5) is fixedly installed with a water pump (13) connected to the second feeding chamber (7). The outlet end of the water pump (13) is connected to an outlet pipe (14). The outlet end of the outlet pipe (14) is arranged in the guide groove (2).

2. The lime wet dosing and slurry distribution device for sewage treatment according to claim 1, characterized in that, A triangular bracket (15) is fixedly installed on the side of the pulp box (5). A primary water equalizer (16) and a secondary water equalizer (17) are fixedly installed on the triangular bracket (15). The primary water equalizer (16) and the secondary water equalizer (17) are both arranged on the pipeline of the water inlet pipe (10).

3. The lime wet dosing and slurry distribution device for sewage treatment according to claim 1, characterized in that, A primary centrifugal pump (18) is fixedly installed on the base (4). The primary centrifugal pump (18) is arranged on the pipeline of the inlet pipe (10). A first shut-off valve (19) is fixedly installed on the outlet pipe of the inlet pipe (10). The outlet of the inlet pipe (10) is arranged at the top of the first dosing cavity (6).

4. The lime wet dosing and slurry distribution device for sewage treatment according to claim 1, characterized in that, Multiple secondary centrifugal pumps (20) are fixedly installed on the base (4). The first water pipe (11) is provided with multiple diversion ports, and each diversion port is connected to the inlet end of each secondary centrifugal pump (20) through a diversion pipe (21). The outlet end of each secondary centrifugal pump (20) is connected to the manifold (22). The outlet end of the manifold (22) is connected to the second water pipe (12). The outlet end of the second water pipe (12) is arranged at the top of the second dosing cavity (7).

5. A lime wet dosing and slurry distribution device for wastewater treatment according to claim 4, characterized in that, Each secondary centrifugal pump (20) is fixedly equipped with a second shut-off valve (23) at its outlet end, and a third shut-off valve (24) is fixedly installed on the outlet end of the second water pipe (12).

6. A lime wet dosing and slurry application device for wastewater treatment according to claim 1, characterized in that, The side of the pulping box (5) is provided with a vertically arranged U-shaped tube (25), both ends of which are connected to the second feeding cavity (7). A set frame (26) is provided around the U-shaped tube (25). The set frame (26) is made of transparent material. A vertically arranged ruler (27) is provided on the side of the set frame (26).

7. A lime wet dosing and slurry distribution device for wastewater treatment according to claim 1, characterized in that, The top side of the pulp distribution box (5) is connected to an overflow pipe (28). The water inlet of the overflow pipe (28) is arranged at a height higher than the water inlet of the water pump (13). The water outlet of the overflow pipe (28) is arranged in the guide groove (2).

8. A lime wet dosing and slurry distribution device for wastewater treatment according to claim 1, characterized in that, The lime slurry delivered by the first dosing pipe (8) has a saturation of 100%, and the lime slurry delivered by the second dosing pipe (9) has a saturation of 10%.

9. A lime wet dosing and slurry distribution device for wastewater treatment according to claim 1, characterized in that, The bottom of the slurry distribution box (5) is provided with a first water discharge pipe (29) and a second water discharge pipe (30), which are respectively connected to the bottom of the first feeding chamber (6) and the second feeding chamber (7).

10. A lime wet dosing and slurry distribution device for wastewater treatment according to claim 1, characterized in that, The side of the pulping box (5) is equipped with multiple boxes (31).

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