Sludge discharge system for final sedimentation tank

Abstract

The utility model discloses a sludge discharge system for a final sedimentation tank, which comprises a final sedimentation tank, a flushing pipe and an outlet return pipe, the flushing pipe and the outlet return pipe are both mounted on the periphery of the final sedimentation tank, and the final sedimentation tank is sequentially divided into an upper tank space, a middle tank space and a lower tank space from top to bottom. Siphons are installed on the peripheries of the outer sides of the upper pond space, the middle pond space and the lower pond space, and exhaust valves are installed on the siphons. According to the sludge discharge system for the final sedimentation tank, air pressure in the siphon is changed through the exhaust valves, deposited sludge in the final sedimentation tank is discharged through the siphon without being discharged through a pump body, the blockage of the pump body caused by blockage can be avoided, the number of the exhaust valves is set according to the length of each surface of the final sedimentation tank, the number of the exhaust valves is gradually increased from the lower part to the upper part, and the sludge discharge efficiency is improved. Due to the fact that each exhaust valve is small in size, only deposited mud on the periphery of an outlet of the exhaust valve can be flushed away after the exhaust valve is opened, and the whole fluid cannot be affected.

Description

Technical Field

[0001] The utility model relates to the technical field of mud discharge, in particular to a mud discharge system for a final sedimentation tank. Background Art

[0002] The wastewater produced by some enterprises is high-calcium and high-salt wastewater. The properties of the sludge produced are very different from those of general biochemical sludge. Because it contains a large amount of calcium salts, it is particularly easy to deposit. When treating the sediment at the bottom of the final sedimentation tank, it cannot be flushed on a large scale. Otherwise, the accumulated sludge at the bottom will be dispersed, and some of the sludge will be discharged with the water flow, resulting in unqualified external drainage. At the same time, the deposited sludge is difficult to discharge. Since the bottom sludge cannot be sucked out for a long time, the inlet of the sludge pump is blocked, and the bottom sludge accumulates and floats to the water surface of the final sedimentation tank. The gas generated by the sludge accumulated at the bottom for a long time carries the sludge to float, resulting in poor appearance of the discharged water quality, excessive suspended solids in the discharged water, and COD indicators that exceed the standard from time to time, affecting the continuous and stable operation of the water treatment.

[0003] For example, the mud discharge system with publication number CN114570070A includes a sedimentation tank, a mud and water conveying component, a filter press device and a transfer component. The sedimentation tank is used to precipitate mud and water. One end of the mud and water conveying component is connected to the sedimentation tank, and the other end of the mud and water conveying component is connected to the filter press device. The filter press device is used to filter the mud and water and separate it into mud cake and clean water. One end of the transfer component is connected to the filter press device, and the transfer component is used to transport the mud cake generated by the filter press device to a preset position.

[0004] The above-mentioned sludge discharge system discharges water through the sludge and water conveying assembly by placing a submersible sewage pump inside the final sedimentation tank. Due to the large amount of sediment in the wastewater, the submersible sewage pump is prone to blockage during the wastewater discharge process, which affects the service life of the submersible sewage pump and the sludge discharge effect. Utility Model Content

[0005] The purpose of the utility model is to provide a sludge discharge system for a final sedimentation tank, so as to solve the problem in the current market proposed in the above background technology that a submersible sewage pump is placed inside the final sedimentation tank to discharge water through a mud and water conveying assembly, and the submersible sewage pump is easily blocked during the wastewater discharge process, thereby affecting the sludge discharge effect.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sludge discharge system for a final sedimentation tank, comprising a final sedimentation tank, a flushing pipe and an outlet return pipe, the flushing pipe and the outlet return pipe being installed around the final sedimentation tank, the final sedimentation tank being divided into three spaces from top to bottom, namely, an upper pool space, a middle pool space and a lower pool space, siphon pipes being installed around the outer sides of the upper pool space, the middle pool space and the lower pool space, and an exhaust valve being installed on the siphon pipes.

[0007] Preferably, each of the siphon pipes consists of two branches, siphon pipes are installed around the final settling tank, and the number of exhaust valves increases gradually from the bottom to the top;

[0008] The two branches of the siphon pipe on the east and west sides of the pool space are respectively equipped with 5 exhaust valves and 4 exhaust valves, and the two branches of the siphon pipe on the north and south sides of the pool space are respectively equipped with 6 exhaust valves and 5 exhaust valves;

[0009] The two branches of the siphon pipe on the east and west sides of the pool space are respectively equipped with 4 exhaust valves and 3 exhaust valves, and the two branches of the siphon pipe on the north and south sides of the pool space are respectively equipped with 5 exhaust valves and 4 exhaust valves;

[0010] The two branch pipes of the siphon pipe on the east and west sides of the space under the pool are respectively installed with 2 exhaust valves and 2 exhaust valves, and the two branch pipes of the siphon pipe on the north and south sides of the space above the pool are respectively installed with 4 exhaust valves and 3 exhaust valves.

[0011] Preferably, a flushing head is installed at the end of the flushing pipe, a plurality of valves are installed on the flushing pipe and the siphon pipe, and two bottom mud pumps are installed on the outlet return pipe.

[0012] Preferably, the final sedimentation tank is arranged in a quadrangular pyramid structure, and the size of the final sedimentation tank gradually decreases from top to bottom.

[0013] Preferably, the siphon tubes are evenly distributed, and the distance between two adjacent siphon tubes is 0.7 m.

[0014] Preferably, the siphon tube is connected to the outlet return pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The utility model is provided with a siphon and an exhaust valve. The exhaust valve changes the air pressure inside the siphon, and the accumulated mud inside the final sedimentation tank is discharged through the siphon. It does not need to be discharged through the pump body, which can avoid the blockage of the pump body due to blockage. At the same time, the use of electrical equipment is reduced, and the use and damage of electrical equipment are greatly reduced. The number of exhaust valves is set according to the length of each surface of the final sedimentation tank, and the number of exhaust valves gradually increases from the bottom to the top. Since the size of each exhaust valve is very small, it is ensured that after the exhaust valve is opened, only the accumulated mud around the exhaust valve outlet can be flushed away, and the entire fluid will not be affected.

[0017] 2. The utility model is provided with a flushing head and an outlet return pipe, and the flushing heads at the bottom of the final sedimentation tank are opened and closed one by one to disperse the accumulated materials attached to the tank wall. Since the flushing area of ​​the flushing head is small, it only acts on the sediment near the flushing head, and the disturbance to the system is small, and the water outlet of the system is not affected. Therefore, it can effectively prevent a large amount of material from accumulating at the bottom of the sedimentation tank, and the dispersed sediments are discharged through the bottom mud pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the mud discharge system of the utility model;

[0019] Figure 2 For this utility model Figure 1 Schematic diagram of the east and west sides of point B in the middle;

[0020] Figure 3 For this utility model Figure 1 Schematic diagram of the south and north sides of point B in the middle;

[0021] Figure 4 For this utility model Figure 1 Schematic diagram of the east and west sides of point A in the middle;

[0022] Figure 5 For this utility model Figure 1 Schematic diagram of the south and north sides of point A in the middle;

[0023] Figure 6 For this utility model Figure 1 Schematic diagram of the east and west sides of point C in the middle;

[0024] Figure 7 For this utility model Figure 1 Schematic diagram of the south and north sides of point C in the middle.

[0025] In the figure: 1. Space above the pool; 2. Space in the pool; 3. Space below the pool; 4. Flushing head; 5. Siphon; 6. Flushing pipe; 7. Bottom mud pump; 8. Outlet return pipe; 9. Exhaust valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 7 , the utility model provides the following technical solutions:

[0028] A sludge discharge system for a final sedimentation tank includes a final sedimentation tank, a flushing pipe 6 and an outlet return pipe 8. The flushing pipe 6 and the outlet return pipe 8 are both installed around the final sedimentation tank. The final sedimentation tank is divided into three spaces from top to bottom: an upper pool space 1, a middle pool space 2 and a lower pool space 3. A flushing head 4 is installed at the end of the flushing pipe 6. Multiple valves are installed on the flushing pipe 6 and the siphon pipe 5. Two bottom sludge pumps 7 are installed on the outlet return pipe 8. The final sedimentation tank is arranged in a quadrangular pyramid structure. The size of the final sedimentation tank gradually decreases from top to bottom. The siphon pipe 5 is connected to the outlet return pipe 8.

[0029] During normal operation, first open the mud pump 7 at the bottom of the final sedimentation tank, and let the flushing water flow into the flushing pipe 6. Use the outlet return pipe 8 of the bottom mud pump 7 to open and close the flushing head 4 at the bottom of the final sedimentation tank one by one to disperse the accumulated materials attached to the tank wall. Because the flushing area of ​​the flushing head 4 is small, it only acts on the sediment near the flushing head 4, which has little disturbance to the system and will not affect the water outlet of the system. Therefore, it can effectively prevent a large amount of material from accumulating at the bottom of the final sedimentation tank. The dispersed sediment is then discharged through the bottom mud pump 7. Only one valve is opened and closed at a time to flush the accumulated mud near the flushing head 4 and ensure that the disturbance to the fluid in the final sedimentation tank is minimized. If the suction port of the bottom mud pump 7 is blocked, flush the corresponding pipeline with flushing water. After the mud around the lower mud outlet is discharged, open the upper suction port of the bottom mud pump 7 to flush and pump away the mud around the suction port. In this way, online mud cleaning can be achieved and the impact on the final sedimentation tank is minimized.

[0030] Siphon pipes 5 are installed around the outside of the upper pool space 1, the middle pool space 2, and the lower pool space 3. Siphon pipes 5 are installed on the siphon pipes 5. Exhaust valves 9 are installed on the siphon pipes 5. Each siphon pipe 5 consists of two branches. Siphon pipes 5 are installed around the final settling tank. The number of exhaust valves 9 increases gradually from the bottom to the top.

[0031] The two branch pipes of the siphon pipe 5 on the east and west sides of the pool space 1 are respectively installed with 5 exhaust valves 9 and 4 exhaust valves 9, and the two branch pipes of the siphon pipe 5 on the north and south sides of the pool space 1 are respectively installed with 6 exhaust valves 9 and 5 exhaust valves 9;

[0032] The two branch pipes of the siphon pipe 5 on the east and west sides of the pool space 2 are respectively installed with 4 exhaust valves 9 and 3 exhaust valves 9, and the two branch pipes of the siphon pipe 5 on the north and south sides of the pool space 1 are respectively installed with 5 exhaust valves 9 and 4 exhaust valves 9;

[0033] The two branch pipes of the siphon pipe 5 on the east and west sides of the under-pool space 3 are respectively installed with 2 exhaust valves 9 and 2 exhaust valves 9, and the two branch pipes of the siphon pipe 5 on the north and south sides of the above-pool space 1 are respectively installed with 4 exhaust valves 9 and 3 exhaust valves 9. The siphon pipes 5 are evenly distributed, and the distance between two adjacent siphon pipes 5 is 0.7m.

[0034] The sludge deposited on the upper part of the final sedimentation tank is removed by siphoning. At this time, the water discharge from the final sedimentation tank is stopped and the corresponding valve is closed. Before operation, pressurized water is injected to disperse the accumulated sludge at each suction port and discharge the air in the siphon tube 5. The accumulated sludge in the tank is extracted by siphoning. The number of exhaust valves 9 is set according to the length of each surface of the final sedimentation tank. The number of exhaust valves 9 gradually increases from the bottom to the top. Because the size of each exhaust valve 9 is very small, it is ensured that after the exhaust valve 9 is opened, only the accumulated sludge around the outlet of the exhaust valve 9 can be flushed away, and the entire fluid will not be affected.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sludge discharge system for a final sedimentation tank, comprising a final sedimentation tank, a flushing pipe (6) and an outlet return pipe (8), wherein the flushing pipe (6) and the outlet return pipe (8) are both installed around the final sedimentation tank, and characterized in that: The final sedimentation tank is divided into three spaces from top to bottom, namely, an upper space (1), a middle space (2) and a lower space (3). Siphon pipes (5) are installed around the outer sides of the upper space (1), the middle space (2) and the lower space (3), and an exhaust valve (9) is installed on the siphon pipes (5).

2. A sludge discharge system for a final sedimentation tank according to claim 1, characterized in that: Each of the siphon pipes (5) consists of two branches, and the siphon pipes (5) are installed around the final sedimentation tank. The number of exhaust valves (9) increases gradually from the bottom to the top; The two branch pipes of the siphon pipe (5) on the east and west sides of the pool space (1) are respectively installed with 5 exhaust valves (9) and 4 exhaust valves (9), and the two branch pipes of the siphon pipe (5) on the north and south sides of the pool space (1) are respectively installed with 6 exhaust valves (9) and 5 exhaust valves (9); The two branch pipes of the siphon pipe (5) on the east and west sides of the pool space (2) are respectively installed with four exhaust valves (9) and three exhaust valves (9), and the two branch pipes of the siphon pipe (5) on the north and south sides of the pool space (1) are respectively installed with five exhaust valves (9) and four exhaust valves (9); The two branch pipes of the siphon pipe (5) on the east and west sides of the pool space (3) are respectively installed with two exhaust valves (9) and two exhaust valves (9), and the two branch pipes of the siphon pipe (5) on the north and south sides of the pool space (1) are respectively installed with four exhaust valves (9) and three exhaust valves (9).

3. The sludge discharge system for a final sedimentation tank according to claim 1, characterized in that: A flushing head (4) is installed at the end of the flushing pipe (6), multiple valves are installed on the flushing pipe (6) and the siphon pipe (5), and two bottom mud pumps (7) are installed on the outlet return pipe (8).

4. A sludge discharge system for a final sedimentation tank according to claim 1, characterized in that: The final sedimentation tank is arranged in a quadrangular pyramid structure, and the size of the final sedimentation tank gradually decreases from the top to the bottom.

5. The sludge discharge system for a final sedimentation tank according to claim 1, characterized in that: The siphon tubes (5) are evenly distributed, and the distance between two adjacent siphon tubes (5) is 0.7 m.

6. The sludge discharge system for a final sedimentation tank according to claim 1, characterized in that: The siphon tube (5) is connected to the outlet return pipe (8).

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