A sewage treatment floating sludge cleaning device

Abstract

The utility model provides a kind of sewage treatment floating sludge cleaning device, belong to sewage treatment technical field, including secondary sedimentation tank and stripping device, the stripping device includes fan, fan is connected with stripping pipe, stripping pipe is used to transport sludge, the stripping pipe is connected with mud removal air pipe by three-way, the air outlet of mud removal air pipe is located below to secondary sedimentation tank liquid surface, and air is transported below secondary sedimentation tank liquid surface by mud removal air pipe to make floating sludge break up and sink.This scheme is by setting mud removal air pipe on stripping pipe, and the air outlet of mud removal air pipe is introduced below secondary sedimentation tank liquid surface, with fan starting, air is discharged from the air outlet of mud removal air pipe, and water surface is stirred by air, and floating sludge on water surface is broken up, and then floating sludge slowly sinks to the bottom of secondary sedimentation tank, to achieve the effect of cleaning floating sludge.This scheme is used, and the sludge amount of secondary sedimentation tank is greatly reduced, and the water quality of flocculator and inclined tube sedimentation tank is further optimized.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater treatment sludge removal device. Background Technology

[0002] Secondary sedimentation tanks are an important component of wastewater treatment systems, typically located after biological treatment units. Their primary function is to separate activated sludge from the biologically treated wastewater. The operation of secondary sedimentation tanks is based on solid-liquid separation technology, specifically utilizing the density difference between activated sludge particles and water to achieve sludge settling, while the purified water flows out from the surface. However, sometimes, due to sludge aging, insufficient dissolved oxygen, influent load fluctuations, or temperature changes, sludge may float to the surface, forming floating sludge, which negatively impacts wastewater treatment.

[0003] Currently, a large amount of floating sludge exists in the secondary sedimentation tank of a certain agricultural wastewater treatment project. The project operates intermittently, and the floating sludge will have the following effects: 1. As the booster pump runs in the next cycle, it will wash the floating sludge from the secondary sedimentation tank to the subsequent flocculation tank and inclined tube sedimentation tank, which will seriously affect the effluent quality and effluent effect, and increase the sludge removal work of on-site staff; 2. The floating sludge accumulates on the surface of the secondary sedimentation tank and clumps together, affecting the appearance of the secondary sedimentation tank. Utility Model Content

[0004] The purpose of this invention is to provide a sewage treatment sludge removal device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A wastewater treatment sludge removal device includes: a secondary sedimentation tank and a stripping device. The stripping device has a stripping pipe for transporting sludge. The stripping pipe is connected to a sludge removal air pipe via a tee. The air outlet of the sludge removal air pipe is located below the liquid surface of the secondary sedimentation tank. Air is supplied to the liquid surface of the secondary sedimentation tank through the sludge removal air pipe to disperse and sink the sludge.

[0007] Preferably, a desliming valve is provided on the desliming gas pipe, which is used to control the opening and closing of the desliming gas pipe; a stripping valve is provided on the stripping pipe, which is used to control the opening and closing of the stripping pipe section downstream of the desliming gas pipe.

[0008] Preferably, the three-way valve is a three-way valve used to control the flow direction of gas.

[0009] Preferably, the outlet of the sludge removal air pipe is located 10-15 cm below the liquid surface of the secondary sedimentation tank.

[0010] Preferably, the outlet of the sludge removal air pipe is located at the horizontal center of the secondary sedimentation tank.

[0011] Preferably, several mud removal air pipes are arranged in parallel, and the air outlets of the several mud removal air pipes are evenly distributed horizontally.

[0012] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0013] This solution involves installing a sludge removal air pipe on the stripping pipe and introducing the air outlet of the sludge removal air pipe below the liquid surface in the secondary sedimentation tank. As the blower starts, air is discharged from the air outlet of the sludge removal air pipe, agitating the water surface and breaking up the floating sludge. The floating sludge then slowly sinks to the bottom of the secondary sedimentation tank, achieving the desired sludge removal effect. After implementing this solution, the amount of sludge loss in the secondary sedimentation tank is significantly reduced, and the water quality in the flocculation tank and inclined tube sedimentation tank is further optimized.

[0014] Based on the on-site equipment operation mode, this solution leverages existing stripping devices to achieve significant results with minimal modifications. The modifications are easy and time-saving, reducing the daily workload of maintenance personnel, reducing energy consumption, and further improving the automation capabilities of the equipment. For rural sewage treatment plants that are widely distributed and numerous, further promotion of this solution will greatly reduce the workload of maintenance personnel, reduce energy consumption, and improve the quality of inspections. Attached Figure Description

[0015] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0016] Figure 1 This is a simplified front view of the present invention.

[0017] Figure 2 This is a simplified top view of the structure of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Secondary sedimentation tank; 2. Steam stripping pipe; 3. Desliming gas pipe; 4. Desliming valve; 5. Steam stripping valve; 6. Tee; 7. Gas outlet; 8. Inspection well. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] To address the issue of excessive floating sludge in the secondary sedimentation tank 1 affecting effluent quality and increasing the workload for staff, this solution utilizes existing technology in the wastewater treatment plant for modification. A sludge removal air pipe 3 is installed on the stripping pipe 2, and the air outlet 7 of the sludge removal air pipe 3 is introduced below the liquid surface in the secondary sedimentation tank 1. Aeration is then carried out through the sludge removal air pipe 3 to the area below the liquid surface, thereby agitating the water surface and breaking up the surface sludge. Subsequently, the sludge slowly sinks to the bottom of the secondary sedimentation tank 1, achieving the effect of cleaning the floating sludge.

[0022] After introducing the basic principles of this utility model, various non-limiting embodiments of this utility model are described in detail below. Any quantity of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0023] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0024] Example 1

[0025] A sewage treatment sludge removal device, such as Figure 1-2 As shown, it includes a secondary sedimentation tank 1 and a stripping device. The stripping device includes a blower, and a stripping pipe 2 is connected to the blower. The stripping pipe 2 is connected to a sludge removal air pipe 3 through a tee 6. The air outlet 7 of the sludge removal air pipe 3 is located below the liquid surface of the secondary sedimentation tank 1. The stripping device delivers air to the liquid surface of the secondary sedimentation tank 1 through the sludge removal air pipe 3, causing the floating sludge to disperse and sink.

[0026] The end of the stripping pipe 2 is connected to the sludge pipe of the secondary sedimentation tank 1. The stripping device (air-steam lifter) technology uses air bubbles generated by injecting gas into the sludge pipe to lift the sludge, realize sludge transportation, and then promote sludge return or discharge of excess sludge. The stripping device is a commonly used existing technology in wastewater treatment.

[0027] In this embodiment, the sludge removal air pipe 3 is connected to the stripping pipe 2 above the liquid surface of the secondary settling tank 1 via a tee 6. The air outlet 7 of the sludge removal air pipe 3 is inserted obliquely downwards into the liquid surface of the secondary settling tank 1 by 10-15 cm, and the position of the air outlet 7 is close to the horizontal center area of ​​the secondary settling tank 1. The sludge removal air pipe 3 is equipped with a sludge removal valve 4, which is a ball valve, for controlling its on / off state. On the stripping pipe 2, downstream of the connection between the tee 6 and the sludge removal air pipe 3 along the air flow direction, another ball valve is installed as a stripping valve 5 to control the on / off state of the stripping pipe 2 section after the tee 6.

[0028] The air outlet 7 of the sludge removal air pipe 3 is located 10-15 cm below the liquid surface of the secondary sedimentation tank 1, neither too deep nor too shallow, ensuring that the air supplied from the outlet 7 can fully agitate the water surface and thus disturb the floating sludge. Furthermore, the outlet 7 is located in the horizontal center of the secondary sedimentation tank 1, causing the water surface agitation to radiate outwards from the center, disturbing the floating sludge across the entire surface and causing it to sink. During operation, operators can quickly adjust the sludge removal valve 4 and the stripping valve 5 through the inspection well 8 to regulate sludge cleaning or sludge transportation: when sludge discharge is required, the sludge removal valve 4 is closed and the stripping valve 5 is opened, allowing air supplied by the blower to enter the sludge discharge pipe and push the sludge out; when sludge cleaning is required, the stripping valve 5 is closed and the sludge removal valve 4 is opened, allowing the sludge removal air pipe 3 to aerate and disturb the floating sludge, causing it to sink.

[0029] Existing wastewater treatment methods typically use sludge scrapers to remove floating sludge from the surface of secondary sedimentation tank 1. However, sludge scrapers are costly and only suitable for secondary sedimentation tank 1 in large wastewater treatment plants. They are not suitable for rural wastewater treatment projects with smaller flow rates and limited space. Another method is spraying to remove floating sludge, but this requires additional pumps and pipes, resulting in higher costs. This proposed solution utilizes existing wastewater treatment plant technology by installing a sludge removal air pipe 3 on the stripping pipe 2. The air outlet 7 of the sludge removal air pipe 3 is introduced below the liquid surface in secondary sedimentation tank 1. Aeration is then applied below the liquid surface through the sludge removal air pipe 3, agitating the water surface and breaking up the surface sludge. The sludge then slowly settles to the bottom of secondary sedimentation tank 1, achieving the desired sludge removal effect. This solution has been applied to approximately 20 sites with capacities of 10t, 20t, 30t, and 50t. After nearly a month of operation, the solution has shown significant effectiveness in removing floating sludge from secondary sedimentation tank 1, with no sludge flocs observed at the bottom of the flocculation tank and inclined tube sedimentation tank.

[0030] Example 2

[0031] Its main difference from Example 1 is:

[0032] The sludge removal pipe is not equipped with a sludge removal valve, and the stripping pipe is not equipped with a stripping valve. Instead, the tee connecting the stripping pipe and the sludge removal pipe is replaced with a three-way valve. This solution can adjust sludge transportation or floating sludge cleaning through a single three-way valve, saving time and effort.

[0033] Example 3

[0034] Its main difference from Example 1 is:

[0035] Several desludge air pipes are installed in parallel on the stripping pipe. The desludge air pipes and the stripping pipe are connected by a T-junction. The air outlets of the desludge air pipes are evenly distributed below the water surface of the secondary sedimentation tank. When in use, the water surface of the entire secondary sedimentation tank is fully agitated, avoiding the problem of insufficient agitation and incomplete settling of floating sludge caused by a single desludge air pipe.

[0036] Example 4

[0037] Its main difference from Example 1 is:

[0038] The sludge removal air pipe has several holes in the part below the water surface. When in use, the gas radiates outward through the holes, which intensifies the disturbance of the water surface in the secondary sedimentation tank and improves the effect of removing floating sludge.

[0039] The above-described preferred embodiments of the present invention are provided for guidance, but it will be apparent to those skilled in the art that such embodiments are provided merely by way of example. Many modifications, alterations, and alternatives will arise in the mind and spirit of the present invention without departing from its intent. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover the modular compositions, equivalents, or alternatives within the scope of these claims.

Claims

1. A sewage treatment sludge removal device, comprising a secondary sedimentation tank (1) and a stripping device, wherein the stripping device has a stripping pipe (2) for conveying sludge, characterized in that, The stripping pipe (2) is connected to a sludge removal air pipe (3) via a tee (6). The air outlet (7) of the sludge removal air pipe (3) is located below the liquid surface of the secondary sedimentation tank (1). Air is delivered to the liquid surface of the secondary sedimentation tank (1) through the sludge removal air pipe (3) to disperse and sink the floating mud.

2. The sewage treatment sludge removal device according to claim 1, characterized in that: A desliming valve (4) is provided on the desliming gas pipe (3), and the desliming valve (4) is used to control the opening and closing of the desliming gas pipe (3); a stripping valve (5) is provided on the stripping pipe (2), and the stripping valve (5) is used to control the opening and closing of the stripping pipe (2) section downstream of the desliming gas pipe (3).

3. The sewage treatment sludge removal device according to claim 1, characterized in that: The three-way valve (6) is a three-way valve used to control the flow direction of gas.

4. The sewage treatment sludge removal device according to claim 1, characterized in that: The air outlet (7) of the sludge removal pipe (3) is located 10-15 cm below the liquid surface of the secondary sedimentation tank (1).

5. The sewage treatment sludge removal device according to claim 4, characterized in that: The outlet (7) of the sludge removal pipe (3) is located at the horizontal center of the secondary sedimentation tank (1).

6. The sewage treatment sludge removal device according to claim 4, characterized in that: Several sludge removal air pipes (3) are arranged in parallel, and the air outlets (7) of the several sludge removal air pipes (3) are evenly distributed horizontally.

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