Sludge drying tank suitable for sludge dewatering of village sewage treatment station
By adopting a three-pool parallel sludge drying pool structure in the village sewage treatment station, combined with the filter layer and drainage pipe design, the problems of discontinuity and low efficiency caused by blockage of sludge drying pool are solved, and the pollution is achieved The stable and efficient treatment of mud dehydration avoids secondary pollution and reduces operating costs.
Patent Information
- Application Number
- CN202421102427.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-05-21
AI Technical Summary
During the sludge filtration process, if a pool is blocked and needs to be cleaned, the entire process needs to be stopped, resulting in discontinuity and inefficiency of sludge dehydration treatment, especially in village sewage treatment stations. protrude.
The three-cell parallel sludge drying tank structure is adopted, and it is divided into drying tank one, drying tank two and drying tank three through partitions. A filter layer and drainage pipe are installed at the bottom of each pool to form a funnel with wide upper and narrow upper bottom. The structure ensures the continuity and efficiency of sludge dewatering treatment.
The continuity and efficiency of sludge dewatering treatment are improved, secondary pollution is prevented, and operating costs and maintenance difficulties are reduced.
Smart Images
Figure CN222293882U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of sewage treatment, in particular to a sludge drying pool suitable for sludge dehydration in village sewage treatment stations. Background Art
[0002] Sludge drying tank is a common method for sludge dehydration in small and medium-sized rural sewage treatment plants and stations. Due to its low construction cost and simple operation and management, it is well suited for sludge dehydration and drying in rural sewage treatment.
[0003] In the patent application with publication number CN 202237426 U, a filter bed system of a sludge drying pool is disclosed, including a palm mat layer, a filter material layer and a support layer arranged in sequence from top to bottom; the utility model adds a palm mat layer on the upper part of the filter material layer, and the sludge is first discharged onto the palm mat layer. After being filtered by the palm mat layer, the filtrate is then discharged to the bottom of the pool through the filter material layer and the support layer in sequence; because the porosity of the palm mat layer is smaller than that of the sand layer of the filter material layer, the sludge is more effectively intercepted, and the efficiency of sludge drying is improved. At the same time, the palm mat layer prevents the sludge from directly impacting the filter material, and also prevents The loss of filter material when cleaning out the dry sludge; the system of the utility model is simple in design, which significantly improves the drying effect of the sludge drying tank, reduces operating costs, and makes operation and maintenance more convenient. It is suitable for treating sludge generated by urban sewage treatment plants and industrial wastewater treatment plants. However, in the prior art, although the sludge is also filtered, there is only one pool for filtering. If one of them is blocked and needs to be cleaned, the entire process needs to be stopped. In order to overcome the above problems, the present application proposes a sludge drying tank suitable for sludge dehydration in village sewage treatment plants. Utility Model Content
[0004] The purpose of the utility model is to propose a sludge drying tank suitable for sludge dehydration in village sewage treatment stations. The traditional single sludge drying tank is transformed into an existing three-tank parallel sludge drying tank through engineering practice. The sludge drying tank structure with three tanks in parallel is adopted to ensure the continuity of sludge dehydration treatment and improve the sludge dehydration efficiency.
[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0006] A sludge drying tank suitable for sludge dehydration in village sewage treatment stations comprises a drying tank body, which is divided into a drying tank 1, a drying tank 2 and a drying tank 3 by partitions, and filter layers are arranged in the drying tank 1, the drying tank 2 and the drying tank 3, and a first drain pipe, a second drain pipe and a third drain pipe are respectively arranged on the bottom surfaces of the drying tank 1, the drying tank 2 and the drying tank 3 below the filter layer.
[0007] Furthermore, the first drying pool, the second drying pool and the third drying pool are all funnel-shaped structures that are wide at the top and narrow at the bottom.
[0008] Furthermore, the first drain pipe, the second drain pipe and the third drain pipe are connected, and the end of the first drain pipe extends out of the side wall of the drying pool.
[0009] Furthermore, the thickness of the filter layer is 200 mm.
[0010] Furthermore, the distance between the filter layer and the top of the drying tank body is 1000 mm.
[0011] Compared with the prior art, the utility model has at least one of the following beneficial effects:
[0012] The utility model sludge drying tank is a traditional sludge drying tank combined with engineering practice experience, and is transformed from a traditional single sludge drying tank into an existing three-tank parallel sludge drying tank through engineering practice. This technology focuses on sludge dehydration, and its construction changes the structure of the traditional sludge drying tank. First, a capillary percolation layer of filter material is added, and a drainage pipe is added at the lower end of the filter layer. After the concentrated sludge and mud-water mixture of the sewage treatment plant are discharged into the drying tank, large particles of sludge are intercepted by the filter layer, and the water passes through the filter layer and is discharged back to the original sewage treatment system. Furthermore, the sludge drying tank structure with three tanks in parallel is adopted to ensure the continuity of sludge dehydration treatment and improve the sludge dehydration efficiency.
[0013] The dehydration mechanism can be divided into three parts:
[0014] ① The interception effect of the filter layer is to use filter materials with stable performance and high water permeability to form a percolation layer, and separate mud and water through physical interception.
[0015] ②The function of the drainage pipe is to effectively discharge the leachate and return it to the sewage treatment station for recycling treatment to prevent secondary pollution caused by external discharge.
[0016] ③ The parallel treatment of three sludge drying tanks can enable continuous sludge dehydration and ensure the stable operation of the treatment station. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is the plan view of the utility model;
[0018] Figure 2 It is a cross-sectional view of the utility model.
[0019] In the figure, 1-drying pool 1; 2-drying pool 2; 3-drying pool 3; 4-filter layer; 5-first drain pipe; 6-second drain pipe; 7-third drain pipe. DETAILED DESCRIPTION
[0020] like Figure 1-2In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0021] Example
[0022] A sludge drying tank suitable for sludge dehydration in a village sewage treatment station comprises a drying tank body, which is divided into a first drying tank 1, a second drying tank 2 and a third drying tank 3 by a partition, and a filter layer 4 is arranged in each of the first drying tank 1, the second drying tank 2 and the third drying tank 3, and a first drainage pipe 5, a second drainage pipe 6 and a third drainage pipe 7 are respectively arranged on the bottom surfaces of the first drying tank 1, the second drying tank 2 and the third drying tank 3 under the filter layer 4;
[0023] The utility model sludge drying tank is a traditional sludge drying tank combined with engineering practice experience, and is transformed from a traditional single sludge drying tank into an existing three-tank parallel sludge drying tank through engineering practice. This technology focuses on sludge dehydration, and its construction changes the structure of the traditional sludge drying tank. First, a capillary percolation layer of filter material is added, and a drainage pipe is added at the lower end of the filter layer. After the concentrated sludge and mud-water mixture of the sewage treatment plant are discharged into the drying tank, large particles of sludge are intercepted by the filter layer, and the water passes through the filter layer and is discharged back to the original sewage treatment system. Furthermore, the sludge drying tank structure with three tanks in parallel is adopted to ensure the continuity of sludge dehydration treatment and improve the sludge dehydration efficiency.
[0024] More specifically, the first drying pool 1, the second drying pool 2 and the third drying pool 3 are all funnel-shaped structures that are wide at the top and narrow at the bottom to facilitate water discharge. The water collecting buckets are built with C10 plain concrete, and the surface layer is plastered with 1:2 cement mortar three times, with a total thickness of 20 mm.
[0025] More specifically, the first drain pipe 5, the second drain pipe 6 and the third drain pipe 7 are interconnected, and the end of the first drain pipe 5 extends out of the side wall of the drying pool 1. The drain pipes are correctly pre-buried during construction. The function of the drain pipes is to effectively discharge the leachate and return it to the sewage treatment station for recycling treatment to prevent secondary pollution caused by external discharge.
[0026] More specifically, the thickness of the filter layer 4 is 200 mm.
[0027] More specifically, the distance between the filter layer 4 and the top of the drying tank body is 1000 mm.
[0028] The dehydration mechanism can be divided into three parts:
[0029] ① The interception effect of the filter layer is to use filter materials with stable performance and high water permeability to form a percolation layer, and separate mud and water through physical interception.
[0030] ②The function of the drainage pipe is to effectively discharge the leachate and return it to the sewage treatment station for recycling treatment to prevent secondary pollution caused by external discharge.
[0031] ③ The parallel treatment of three sludge drying tanks can enable continuous sludge dehydration and ensure the stable operation of the treatment station.
[0032] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.
Claims
1. Sludge drying tank suitable for sludge dehydration in village sewage treatment plants, characterized by: The invention comprises a drying pool body, wherein the drying pool body is divided into a first drying pool (1), a second drying pool (2) and a third drying pool (3) by a partition plate, and a filter layer (4) is arranged in each of the first drying pool (1), the second drying pool (2) and the third drying pool (3), and a first drainage pipe (5), a second drainage pipe (6) and a third drainage pipe (7) are respectively arranged on the bottom surfaces of the first drying pool (1), the second drying pool (2) and the third drying pool (3) below the filter layer (4).
2. The sludge drying tank suitable for sludge dehydration in village sewage treatment plants according to claim 1 is characterized by: The first drying pool (1), the second drying pool (2) and the third drying pool (3) are all funnel-shaped structures that are wide at the top and narrow at the bottom.
3. The sludge drying tank suitable for sludge dehydration in village sewage treatment plants according to claim 1, characterized in that: The first drainage pipe (5), the second drainage pipe (6) and the third drainage pipe (7) are interconnected, and the end of the first drainage pipe (5) extends out of the side wall of the drying pool (1).
4. The sludge drying tank suitable for sludge dehydration in village sewage treatment plants according to claim 1, characterized in that: The thickness of the filter layer (4) is 200 mm.
5. The sludge drying tank suitable for sludge dehydration in village sewage treatment plants according to claim 1 or 4, characterized in that: The distance between the filter layer (4) and the top of the drying tank body is 1000 mm.