Sedimentation tank for sewage treatment

Abstract

The utility model discloses a sedimentation tank for sewage treatment, which comprises a tank body, the tank body is sequentially divided into a sedimentation area, a water accumulation area and a sludge accumulation area, and the bottom of the sedimentation area is provided with a channel for connecting the sedimentation area and the sludge accumulation area in series; a driving wheel of the conveyor belt assembly is rotatably mounted on the side wall of the sludge deposition area and horizontally arranged at the upper part of the sludge deposition area, and a driven wheel of the conveyor belt assembly is rotatably mounted on the side wall of the settling area and horizontally arranged in the settling area; a conveyor belt of the conveyor belt assembly passes through the settling zone, the water accumulation zone, the sludge accumulation zone and the channel and is assembled with the driving wheel and the driven wheel; the conveyor belt passing through the settling zone is partially located at the bottom of the settling zone and is parallel to the bottom of the settling zone; a scraper of the scraper assembly is fixedly mounted in the sludge deposition area and is matched with the conveying terminal of the conveying belt positioned at the upper part of the sludge deposition area so as to scrape sediments on the conveying belt and enable the sediments to enter the sludge deposition area.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sedimentation tank for sewage treatment. Background Technique

[0002] A sedimentation tank is a structure that uses sedimentation to remove suspended solids in sewage. In practical applications, due to the large amount of domestic and industrial sewage to be treated every day, a large amount of sludge will accumulate in the sedimentation tank. In order to maintain normal sewage treatment work, it is necessary to timely remove the sludge deposited at the bottom of the tank. In the prior art, generally, the method of manually entering the tank to remove sludge with low efficiency and high labor intensity or using a sludge scraper with high cost is used for sludge removal. Content of the Utility Model

[0003] To solve the technical problems in the background technique, the utility model proposes a sedimentation tank for sewage treatment.

[0004] The specific technical solutions are as follows:

[0005] The sedimentation tank for sewage treatment includes: a tank body, which is successively divided into a sedimentation area, a water accumulation area, and a sludge accumulation area. A channel connecting the sedimentation area and the sludge accumulation area is opened at the bottom of the sedimentation area;

[0006] A conveyor belt assembly, the driving wheel of the conveyor belt assembly is rotatably installed on the side wall of the sludge accumulation area and horizontally arranged above the sludge accumulation area, the driven wheel of the conveyor belt assembly is rotatably installed on the side wall of the sedimentation area and horizontally arranged in the sedimentation area. The conveyor belt of the conveyor belt assembly passes through the sedimentation area, the water accumulation area, the sludge accumulation area, and the channel and forms an assembly with the driving wheel and the driven wheel. The part of the conveyor belt passing through the sedimentation area is located at the bottom of the sedimentation area and is arranged parallel to the bottom of the sedimentation area;

[0007] A scraper assembly, the sludge scraper of the scraper assembly is fixedly installed in the sludge accumulation area and cooperates with the transmission terminal of the conveyor belt located above the sludge accumulation area to scrape the sediment on the conveyor belt and fall into the sludge accumulation area.

[0008] Optimally, the two sides of the conveyor belt located in the sedimentation area are correspondingly close to the two side walls of the sedimentation area, and there is an overflow gap between the two sides of the conveyor belt located in the water accumulation area and the two side walls of the water accumulation area.

[0009] Optimally, the sedimentation tank for sewage treatment further includes: two mud baffles, which are installed in the water accumulation area and respectively form a close contact with the two sides of the upper surface of the conveyor belt located in the water accumulation area to prevent the sediment on the conveyor belt from falling into the water accumulation area through the gap along with the water flow.

[0010] Optimally, the arrangement height of the driving wheel is higher than that of the driven wheel.

[0011] Optimally, a first flow channel communicating the bottom of the water accumulation area with the outside of the tank body is provided at the bottom of the tank body, and the first flow channel is communicated with the channel.

[0012] Optimally, the sedimentation tank for sewage treatment further includes a spiral transmission mechanism. A sludge discharge channel communicating with the outside of the tank body is also provided at the bottom of the tank body. A second flow channel communicating with the bottom of the sludge accumulation area is provided at the bottom of the tank body. The second flow channel is vertically arranged and communicates with the sludge discharge channel. The transmission screw of the spiral transmission mechanism is assembled in the sludge discharge channel to output the sediment that has fallen into the sludge discharge channel by its own weight via the second flow channel in the sludge accumulation area from the sludge discharge channel.

[0013] Optimally, the lower part of the sludge accumulation area is gradually narrowed to connect with the second flow channel. The upper area of the sludge accumulation area, the lower area of the sludge accumulation area, and the second flow channel are coaxially arranged in the vertical direction.

[0014] Optimally, the width of the sludge scraping plate is adapted to the conveyor belt. There are a number of openings for the sediment to fall by its own weight along the width direction of the sludge scraping plate located in front of the conveying end of the conveyor belt. The openings are all directly above the second flow channel.

[0015] Optimally, a number of idler rollers abutting against the conveyor belt are installed on the bottom wall of the sedimentation area.

[0016] The beneficial effects of the present utility model are as follows:

[0017] By arranging a conveyor belt conveying device at the bottom of the sedimentation tank, the sludge deposited at the bottom of the tank can be directly discharged from the bottom of the tank, without having to use the method of manually entering the tank to remove sludge with low efficiency and high labor intensity or using a sludge scraping plate with high cost for sludge cleaning. Description of the Drawings

[0018] Figure 1 It is the front view of a sedimentation tank for sewage treatment proposed by the present utility model.

[0019] Figure 2 It is the top view of a sedimentation tank for sewage treatment proposed by the present utility model. Detailed Embodiment

[0020] Now, the technical solution of the present utility model will be described in detail and specifically in combination with the drawings.

[0021] As Figure 1 、 Figure 2 shown, the sedimentation tank for sewage treatment includes: a tank body 1, and the tank body 1 is successively divided into a sedimentation area 2, a water accumulation area 3, and a sludge accumulation area 4. A channel 5 connecting the sedimentation area 2 and the sludge accumulation area 4 is opened at the bottom of the sedimentation area 2;

[0022] The conveyor belt assembly 6, the driving wheel 62 of the conveyor belt assembly 6 is rotatably installed on the side wall of the sediment accumulation area 4 and horizontally arranged above the sediment accumulation area 4. The driven wheel 61 of the conveyor belt assembly 6 is rotatably installed on the side wall of the sedimentation area 2 and horizontally arranged in the sedimentation area 2. The conveyor belt 63 of the conveyor belt assembly 6 passes through the sedimentation area 2, the water accumulation area 3, the sediment accumulation area 4 and the channel 5 and forms an assembly with the driving wheel 62 and the driven wheel 61. The part of the conveyor belt 63 passing through the sedimentation area 2 is at the bottom of the sedimentation area 2 and is arranged parallel to the bottom of the sedimentation area 2;

[0023] The slope of the bottom of the sedimentation area 2 can provide support for the upper return part of the conveyor belt 63, avoiding the conveyor belt 63 being depressed by the sediment on it and affecting the transmission performance. The lower return part of the conveyor belt 63 passes through the channel 5 and is arranged parallel to the bottom of the sedimentation area 2. The lower return part of the conveyor belt 63 is as close as possible to the parallel bottom below to avoid sediment accumulation here.

[0024] The scraping plate assembly 7, the mud scraping plate 711 of the scraping plate assembly 7 is fixedly installed in the sediment accumulation area 4 and cooperates with the transmission terminal of the conveyor belt 63 located above the sediment accumulation area 4 to scrape the sediment on the conveyor belt 63 and fall into the sediment accumulation area 4.

[0025] The sewage flowing into the sedimentation area 2 from the top end of one side of the pool body 1 along the direction of the arrow 14 first precipitates on the slowly moving conveyor belt 63 arranged at the bottom of the pool. Subsequently, the sediment is transported to the upper part of the sediment accumulation area 4 along with the conveyor belt 63. When encountering the mud scraping plate 71, the sediment is scraped into the sediment accumulation area 4. The clarified water in the upper part of the sedimentation area 2 then enters the water accumulation area 3.

[0026] The two sides of the conveyor belt 63 located in the sedimentation area 2 are correspondingly close to the two side walls of the sedimentation area 2, ensuring that the sediment on the conveyor belt 63 does not fall from both sides of the conveyor belt 63 to the bottom of the sedimentation tank 2. There is an overflow gap 31 between the two sides of the conveyor belt 63 located in the water accumulation area 3 and the two side walls of the water accumulation area 3. The clarified water in the sewage after removing the sediment can smoothly flow into the water accumulation area 3 through the overflow gap 31 along the direction of the arrow 19 in the figure.

[0027] The sewage treatment sedimentation tank further includes: two mud baffle plates 64, installed in the water accumulation area 3 and respectively forming a close contact with both sides of the upper surface of the conveyor belt 63 located in the water accumulation area 3 to prevent the sediment on the conveyor belt 63 from falling into the water accumulation area 3 along with the water flow through the gap 31.

[0028] The arrangement height of the driving wheel 62 is higher than that of the driven wheel 61. This kind of high-low design can form a certain resistance to the water flow of the sewage above the conveyor belt 63, thereby slowing down the water flow speed and making the suspended matter in the sewage easier to precipitate on the conveyor belt 63.

[0029] A first flow channel 8 communicating the bottom of the water accumulation area 3 with the outside of the pool body 1 is provided at the bottom of the pool body 1. The first flow channel 8 is communicated with the channel 5, as Figure 1As shown, the clarified water part in the water accumulation area 3 will flow into the channel 5, then flow into the first flow channel 8 through the notch 85 at the bottom of the pool, and finally be discharged from the pool body 1.

[0030] It further includes a spiral transmission mechanism 9. A sludge discharge channel 11 communicating with the outside of the pool body 1 is provided at the bottom of the pool body 1. A second flow channel 12 communicating with the bottom of the sludge accumulation area 4 is provided at the bottom of the pool body 1. The second flow channel 12 is vertically arranged and communicates with the sludge discharge channel 11. The transmission screw 91 of the spiral transmission mechanism 9 is assembled in the sludge discharge channel 11 to output the sediment that has fallen into the sludge discharge channel 11 by its own weight from the sludge accumulation area 4 via the second flow channel 12. The spiral transmission mechanism 9 can ensure that the sludge is discharged from the pool body 1 in a timely and efficient manner.

[0031] The lower part of the sludge accumulation area 4 is gradually tapered to connect with the second flow channel 12. The upper area, the lower area of the sludge accumulation area 4, and the second flow channel 12 are coaxially arranged in the vertical direction. In a specific embodiment, the lower part of the sludge accumulation area 4 can be a conical structure with a larger upper part and a smaller lower part. The above structural design can enable the sludge sediment to smoothly pass through the sludge accumulation area 4 and the second flow channel 12.

[0032] The width of the scraping plate 71 is adapted to the conveyor belt 63. There are a number of openings 15 for the sediment to fall by its own weight along the width direction of the scraping plate 71 on the scraping plate 71 located in front of the conveying end of the conveyor belt 63. The openings 15 are all located directly above the second flow channel 12.

[0033] As Figure 1 shown, a number of idler rollers 13 abutting against the conveyor belt are installed on the bottom wall of the sedimentation area 2. The idler rollers 13 can reduce the friction during the conveyance of the conveyor belt 63, and at the same time can provide support for the conveyor belt 63 to ensure the stability of the operation of the conveyor belt assembly 63.

[0034] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A sedimentation tank for sewage treatment, characterized in that: The invention comprises: a pool body (1), wherein the pool body (1) is divided into a sedimentation area (2), a water accumulation area (3), and a mud accumulation area (4) in sequence, and a channel (5) is provided at the bottom of the sedimentation area (2) to connect the sedimentation area (2) and the mud accumulation area (4) in series; A conveyor belt assembly (6), wherein a driving wheel (62) of the conveyor belt assembly (6) is rotatably mounted on a side wall of a mud accumulation area (4) and is horizontally arranged at an upper portion of the mud accumulation area (4); a driven wheel (61) of the conveyor belt assembly (6) is rotatably mounted on a side wall of a sedimentation area (2) and is horizontally arranged at the sedimentation area (2); a conveyor belt (63) of the conveyor belt assembly (6) passes through the sedimentation area (2), the water accumulation area (3), the mud accumulation area (4) and the passage (5) and forms an assembly with the driving wheel (62) and the driven wheel (61); a portion of the conveyor belt (63) passing through the sedimentation area (2) is located at the bottom of the sedimentation area (2) and is arranged parallel to the bottom of the sedimentation area (2); A scraper assembly (7), wherein a scraper blade (71) of the scraper assembly (7) is fixedly installed in the mud accumulation area (4) and cooperates with a transmission terminal of a conveyor belt (63) located above the mud accumulation area (4) to scrape off sediment on the conveyor belt (63) and allow the sediment to enter the mud accumulation area (4).

2. The sewage treatment sedimentation tank according to claim 1, characterized in that: The two sides of the conveyor belt (63) located in the sedimentation area (2) are correspondingly close to the two side walls of the sedimentation area (2), and overflow gaps (31) are left between the two sides of the conveyor belt (63) located in the water accumulation area (3) and the two side walls of the water accumulation area (3).

3. The sewage treatment sedimentation tank according to claim 1, characterized in that: Also includes: Two fenders (64) are installed in the water accumulation area (3) and are respectively in contact with both sides of the upper surface of the conveyor belt (63) located in the water accumulation area (3) to prevent sediment on the conveyor belt (63) from falling into the water accumulation area (3) through the gap (31) along with the water flow.

4. The sewage treatment sedimentation tank according to claim 1, characterized in that: The arrangement height of the driving wheel (62) is higher than that of the driven wheel (61).

5. The sewage treatment sedimentation tank according to claim 1, characterized in that: A first flow channel (8) is provided at the bottom of the pool body (1) and connects the bottom of the water accumulation area (3) with the outside of the pool body (1), and the first flow channel (8) is connected with the channel (5).

6. The sedimentation tank for sewage treatment according to claim 1, characterized in that: The invention also comprises a spiral transmission mechanism (9); a mud outlet channel (11) communicating with the outside of the pool body (1) is provided at the bottom of the pool body (1); a second flow channel (12) communicating with the bottom of the mud accumulation area (4) is provided at the bottom of the pool body (1); the second flow channel (12) is arranged vertically; the second flow channel (12) is communicated with the mud outlet channel (11); a transmission screw (91) of the spiral transmission mechanism (9) is assembled in the mud outlet channel (11) to output the sediment in the mud accumulation area (4) that falls into the mud outlet channel (11) by its own weight through the second flow channel (12) to the mud outlet channel (11).

7. The sedimentation tank for sewage treatment according to claim 6, characterized in that: The lower portion of the mud accumulation area (4) gradually narrows until it is connected to the second flow channel (12), and the upper region of the mud accumulation area (4), the lower region of the mud accumulation area (4) and the second flow channel (12) are coaxially arranged in the vertical direction.

8. The sedimentation tank for sewage treatment according to claim 6, characterized in that: The scraper plate (71) is adapted to the conveyor belt (63) in the width direction, and the scraper plate (71) located in front of the conveying end of the conveyor belt (63) has a plurality of openings (15) along the width direction of the scraper plate (71) for sediment to fall due to its own weight, and the openings (15) are all located directly above the second flow channel (12).

9. The sedimentation tank for sewage treatment according to claim 1, characterized in that: A plurality of rollers (13) are mounted on the bottom wall of the sedimentation zone (2) and are supported against the conveyor belt.

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