Closed automatic sludge discharge device

Abstract

The utility model relates to the technical field of sewage treatment, and provides a closed automatic sludge discharge device which comprises a secondary sedimentation tank, a chain plate type sludge scraper, a cover plate and a gas collection device, and a pair of rails is arranged in the secondary sedimentation tank along the length direction of the secondary sedimentation tank; a chain plate type mud scraper moves along the pair of rails, the chain plate type mud scraper is used for scraping mud, and the chain plate type mud scraper is a corrosion-resistant chain plate type mud scraper; the cover plate covers the secondary sedimentation tank so as to seal the secondary sedimentation tank; a part of the gas collecting device penetrates through the cover plate and extends into the secondary sedimentation tank, and the gas collecting device is used for collecting gas in the secondary sedimentation tank. According to the closed type automatic sludge discharging device, the chain plate type sludge scraper is integrally arranged to be a corrosion-resistant chain plate type sludge scraper, so that the chain plate type sludge scraper can normally work in a closed space and cannot be corroded; by arranging the cover plate and the gas collecting device, gas leakage is avoided, and pollution to the environment is avoided.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a closed automatic sludge discharge device. Background Technology

[0002] In existing activated sludge wastewater treatment processes, the secondary sedimentation tank plays a crucial role as a key process step. The secondary sedimentation tank effectively separates sludge from water, maintaining the sludge age of the system by periodically removing excess and dead sludge, and ensuring the stability of sludge concentration within the biological reaction tank, thereby guaranteeing the normal operation of the wastewater treatment process.

[0003] However, during the operation of secondary sedimentation tanks, odorous gases such as ammonia and hydrogen sulfide are inevitably produced. These gases, once released from the water surface, can have a negative impact on the surrounding air environment. To solve this odor problem, secondary sedimentation tanks are usually covered, and the emitted odors are collected and treated to reduce environmental pollution.

[0004] Despite this, during the operation of the secondary sedimentation tank, surface sludge and bottom sludge will accumulate. These sludge particles need to be removed regularly; otherwise, the overall operational efficiency of the secondary sedimentation tank and the biological reaction tank will be affected. Currently, a sludge scraper / suction machine is typically used to scrape surface sludge and suction bottom sludge. The scraper / suction machine travels back and forth along the length of the tank to complete the sludge removal operation. If the secondary sedimentation tank is directly covered, sealing the scraper / suction machine inside, corrosive gases such as ammonia and hydrogen sulfide emitted from the tank will quickly corrode and damage the machine, and will also make it extremely difficult for maintenance personnel to access it. If only the surface of the tank is covered, multiple pipes and supports for the scraper / suction machine extend to the bottom of the tank. To facilitate the machine's movement, several gaps need to be left in the cover. While this design allows the scraper / suction machine to operate normally, it severely affects the collection of odors, causing odors to overflow and failing to effectively solve the odor problem.

[0005] Therefore, how to effectively cover and seal the secondary sedimentation tank while ensuring the normal discharge of floating sludge and bottom sludge, and at the same time avoid corrosion and damage to the sludge scraper and suction machine and facilitate maintenance by maintenance personnel, has become an urgent technical problem to be solved. Utility Model Content

[0006] This invention provides a sealed automatic sludge discharge device to solve the defects of the prior art in preventing odor leakage and corrosion of the sludge scraper.

[0007] This utility model provides a closed automatic sludge discharge device, comprising: a secondary sedimentation tank, wherein a pair of tracks are provided along the length of the secondary sedimentation tank; a chain plate scraper that moves along the pair of tracks, the chain plate scraper being used for scraping sludge, the chain plate scraper being a corrosion-resistant chain plate scraper cover plate, which is placed on the secondary sedimentation tank to seal the secondary sedimentation tank; and a gas collection device, a portion of which extends through the cover plate into the secondary sedimentation tank, the gas collection device being used to collect gas in the secondary sedimentation tank.

[0008] According to the present invention, a closed automatic sludge discharge device is provided, wherein the bottom surface of the secondary sedimentation tank is covered with a steel plate, the steel plate includes a first steel plate and a second steel plate connected together, the first steel plate is inclined, the second steel plate is horizontally arranged, and the distance between the second steel plate and the cover plate is greater than the distance between the first steel plate and the cover plate; the secondary sedimentation tank has a first inner wall and a second inner wall opposite to each other, the first inner wall is adjacent to the first steel plate, and the second inner wall is adjacent to the second steel plate.

[0009] According to the present invention, a closed automatic sludge discharge device further includes: multiple pumps, which are arranged sequentially along the length of the secondary sedimentation tank and mounted on the second steel plate; and multiple sludge discharge pipes, the first end of each sludge discharge pipe being connected to one of the pumps and the second end of each sludge discharge pipe extending through the second inner wall to the outside of the secondary sedimentation tank.

[0010] According to the present invention, a closed automatic sludge discharge device further includes: multiple cleaning pipes, each of which is connected to a sludge discharge pipe; multiple control valves, each of which is disposed on a cleaning pipe; and a controller electrically connected to the control valves, the controller being used to control the control valves to open when the sludge discharge pipe is connected to an external water source.

[0011] According to the present invention, a closed automatic mud discharge device is provided, wherein the outlet of each of the cleaning pipes faces the second inner wall.

[0012] According to the present invention, a closed automatic sludge discharge device further includes multiple cleaning mechanisms, which are spaced apart from multiple pumps. Each cleaning mechanism is used to flush the sludge on the second steel plate.

[0013] According to the present invention, a closed automatic sludge discharge device is provided, each of the cleaning mechanisms includes: a main pipeline having a bend, a first end of the main pipeline being connected to the second steel plate, and a second end of the main pipeline extending to the outside of the secondary sedimentation tank; and a plurality of branch pipes, the first end of each branch pipe being connected to the main pipeline, and the second end of each branch pipe facing the second inner wall, or the second end of each branch pipe facing the wall adjacent to the second inner wall.

[0014] According to the present invention, a closed automatic sludge discharge device is provided, wherein each branch pipe is inclined to the main pipe, and the second end of each branch pipe is downward.

[0015] According to the present invention, a closed automatic sludge discharge device further includes multiple moving mechanisms. The cover plate has multiple through holes along its length, each through hole being aligned with one of the pumps. The size of each through hole is larger than the size of the pump. The multiple moving mechanisms are arranged one-to-one with the multiple pumps. Each moving mechanism includes: a slide rail disposed in the secondary sedimentation tank; and a moving plate whose size is larger than the size of the through hole. The moving plate is slidably connected to the slide rail to close or open the through hole.

[0016] According to the present invention, a closed automatic sludge discharge device is provided, wherein the gas collection device includes: an air outlet pipe, the first end of which extends into the secondary sedimentation tank; and a gas collection box, which is connected to the second end of the air outlet pipe.

[0017] The closed automatic sludge discharge device provided by this utility model, by setting the entire chain plate sludge scraper as a corrosion-resistant chain plate sludge scraper, allows the chain plate sludge scraper to work normally in a closed space without being corroded; by setting a cover plate and a gas collection device, gas leakage is avoided, thus preventing pollution to the environment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front view of the sealed automatic sludge discharge device provided by this utility model.

[0020] Figure 2 yes Figure 1 The enlarged view of point A shown in the image.

[0021] Figure label:

[0022] 1. Secondary sedimentation tank; 11. First inner wall; 12. Second inner wall; 13. Steel plate; 131. First steel plate; 132. Second steel plate; 2. Chain-type sludge scraper; 3. Cover plate; 31. Through hole; 41. Air outlet pipe; 42. Air collection box; 51. Slide rail; 52. Moving plate; 61. Pump; 611. Lifting ring; 62. Sludge discharge pipe; 71. Cleaning pipe; 72. Control valve. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0024] The following is combined with Figure 1 and Figure 2 This invention describes a closed-type automatic sludge discharge device.

[0025] like Figure 1 As shown in the embodiment of this utility model, the sealed automatic sludge discharge device includes: a secondary settling tank 1, a chain-plate scraper 2, a cover plate 3, and a gas collection device. A pair of tracks are arranged along the length of the secondary settling tank 1, and the chain-plate scraper 2 moves along these tracks. The cover plate 3 is placed over the secondary settling tank 1 to seal it. A portion of the gas collection device extends through the cover plate 3 into the secondary settling tank 1, and the gas collection device is used to collect gas within the secondary settling tank 1.

[0026] Specifically, the secondary sedimentation tank 1 is equipped with a pair of chain-type tracks. As the chain-plate scraper 2 moves along these tracks, it scrapes the settled floating sludge into the discharge trough. The secondary sedimentation tank 1 is covered with a cover plate 3. The chain-plate scraper 2 operates within the secondary sedimentation tank 1 in a sealed environment. In this embodiment, the chain-plate scraper 2 is constructed entirely of corrosion-resistant materials to prevent corrosion from gases within the secondary sedimentation tank 1. Optionally, the chain-plate scraper 2 can be made of corrosion-resistant rubber, nylon, or 304 stainless steel. Gases within the secondary sedimentation tank 1 are collected by a gas collection device. In this embodiment, the chain-plate scraper 2 operates normally without corrosion, while simultaneously collecting odors to prevent leakage and environmental pollution.

[0027] Optionally, in an embodiment of this utility model, the cover plate 3 can be a fiberglass plate to facilitate observation of the secondary sedimentation tank 1.

[0028] The sealed automatic sludge discharge device provided in this embodiment of the utility model, by setting the entire chain plate sludge scraper as a corrosion-resistant chain plate sludge scraper, allows the chain plate sludge scraper to work normally in a closed space without being corroded; by setting a cover plate and a gas collection device, gas leakage is avoided, thus preventing pollution to the environment.

[0029] like Figure 1 As shown in the embodiment of this utility model, a steel plate 13 is laid on the bottom surface of the secondary sedimentation tank 1. The steel plate 13 includes a first steel plate 131 and a second steel plate 132 connected together. The first steel plate 131 is inclined, and the second steel plate 132 is horizontal. The distance between the second steel plate 132 and the cover plate 3 is greater than the distance between the first steel plate 131 and the cover plate 3. The first steel plate 131 and the second steel plate 132 form a sludge hopper to increase the sludge concentration on the second steel plate 132.

[0030] Furthermore, the secondary sedimentation tank 1 has a first inner wall 11 and a second inner wall 12, the first inner wall 11 being adjacent to the first steel plate 131 and the second inner wall 12 being adjacent to the second steel plate 132.

[0031] like Figure 1 As shown in the embodiment of this utility model, the closed-type automatic sludge discharge device further includes: multiple pumps 61 and multiple sludge discharge pipes 62. The multiple pumps 61 are arranged sequentially along the length direction of the secondary sedimentation tank 1, and the multiple pumps 61 are mounted on the second steel plate 132. The first end of each sludge discharge pipe 62 is connected to a pump 61, and the second end of each sludge discharge pipe 62 penetrates the second inner wall 12 and extends to the outside of the secondary sedimentation tank 1.

[0032] Specifically, the settled sludge is divided into floating sludge and bottom sludge. In this embodiment of the invention, when the chain-plate scraper 2 moves along the track, it can scrape the floating sludge into the sludge discharge trough. The bottom sludge accumulates on the second steel plate 132 and is drawn into the sludge discharge trough through the sludge discharge pipe 62 by multiple pumps 61. In this embodiment, by setting an inclined first steel plate 131 and a horizontal second steel plate 132 in the secondary sedimentation tank 1, the settled sludge can accumulate on the second steel plate 132 as much as possible, thereby increasing the sludge concentration on the second steel plate 132, facilitating the pump 61 to draw it in, and thus improving the sludge discharge efficiency.

[0033] Furthermore, when there are a large number of secondary sedimentation tanks 1, such as two secondary sedimentation tanks 1, the pumps 61 in each secondary sedimentation tank 1 can be operated in turn. This can ensure that the sludge in the secondary sedimentation tank 1 has a certain settling time, and can also avoid the problem of excessive instantaneous sludge discharge and the inability of the sludge discharge trough to discharge sludge smoothly.

[0034] Furthermore, because the sludge hopper formed by the first steel plate 131 and the second steel plate 132 is relatively large, the pumping capacity of the pump 61 is limited. To prevent sludge from accumulating in the corners of the sludge hopper and causing caking, thus affecting the pumping effect...

[0035] In an optional embodiment of this utility model, such as Figure 2 As shown, the closed-loop automatic sludge discharge device also includes: multiple cleaning pipes 71, multiple control valves 72, and a controller. Each cleaning pipe 71 is connected to a sludge discharge pipe 62, and each cleaning pipe 71 is equipped with a control valve 72. When the pump 61 draws sludge outward, the control valve 72 is closed, and the sludge cannot be discharged from the cleaning pipe 71. When the sludge discharge pipe 62 is connected to an external water source, the control valve 72 is open, and water enters the cleaning pipe 71 from the sludge discharge pipe 62 and then exits from the cleaning pipe 71 to flush the sludge in the corners of the sludge hopper and prevent sludge from caking.

[0036] In this embodiment, since the secondary sedimentation tank 1 is a closed space, the opening of the control valve 72 cannot be operated manually. Therefore, in this embodiment of the present invention, the closed automatic sludge discharge device also includes a controller. The controller is electrically connected to the control valve 72. When the sludge discharge pipe 62 is connected to the external water source, the controller is operated manually to open the control valve 72. After flushing is completed, the controller is operated manually again to close the control valve 72.

[0037] Furthermore, the outlet of each cleaning pipe 71 faces the second inner wall 12 to flush the sludge at the corner formed by the second steel plate 132 and the second inner wall 12, so as to prevent the sludge from caking and affecting the pumping effect of the pump 61.

[0038] In the above embodiments, the steel plate 13, pump 61, sludge discharge pipe 62, cleaning pipe 71 and control valve 72 are all made of corrosion-resistant materials.

[0039] In another optional embodiment of the present invention, the closed automatic sludge discharge device includes multiple cleaning mechanisms, which are spaced apart from multiple pumps 61. Each cleaning mechanism is used to flush the sludge on the second steel plate 132.

[0040] Furthermore, each cleaning unit includes a main pipe and multiple branch pipes. The main pipe has a bend, a first end of which is connected to the second steel plate 132, and a second end of which extends to the outside of the secondary sedimentation tank 1. The first end of each branch pipe is connected to the main pipe, and the second end of each branch pipe faces the second inner wall 12, or the second end of each branch pipe faces the wall adjacent to the second inner wall 12.

[0041] Specifically, in this embodiment, the main pipeline includes a first pipeline and a second pipeline. The first pipeline and the second pipeline are arranged perpendicularly and connected. One end of the first pipeline extends through the second inner wall 12 to the outside of the secondary sedimentation tank 1, and the second pipeline is connected to the second steel plate 132. Multiple branch pipes are connected to the second pipeline, each branch pipe facing the second inner wall 12, or each branch pipe facing a wall adjacent to the second inner wall 12. The branch pipes facing the second inner wall 12 can flush the sludge at the corner formed by the second inner wall 12 and the second steel plate 132; the branch pipes facing the wall adjacent to the second inner wall 12, such as the front wall or the rear wall, can flush the sludge at the corner formed by the front wall and the second steel plate 132, or the corner formed by the rear wall and the second steel plate 132.

[0042] Furthermore, in the embodiments described above, each branch pipe is inclined to the main pipe, and the outlet end of each branch pipe is set downwards, so that water can be sprayed directly to the corners to enhance the flushing effect.

[0043] After the cover plate 3 is installed on the secondary sedimentation tank 1, a closed space is formed inside the secondary sedimentation tank 1, preventing operators from entering the maintenance area. Therefore, the cover plate 3 has multiple through holes 31, each aligned with a pump 61. The size of each through hole 31 is larger than the size of the pump 61, facilitating the lifting of the pump 61 through the through hole 31 for maintenance. Furthermore, the pump 61 is equipped with lifting rings 611 for easy lifting.

[0044] In an optional embodiment of this utility model, a cover body can be provided at the through hole 31 of the cover plate 3, and a sealing ring is provided at the through hole 31. One side of the cover body is rotatably connected to the cover plate 3. When the cover body is lifted, the pump 61 can be lifted.

[0045] In another optional embodiment of this utility model, the closed-type automatic sludge discharge device further includes multiple moving mechanisms, each corresponding to one of the multiple pumps 61. Each moving mechanism includes a slide rail 51 and a moving plate 52. The slide rail 51 is disposed inside the secondary sedimentation tank 1, and the moving plate 52 can move along the slide rail 51. The size of the moving plate 52 is larger than the size of the through hole 31. When the moving plate 52 moves to the through hole 31, it can block the through hole 31, thereby preventing gas from escaping from the through hole 31; when maintenance of the pump 61 is required, the moving plate 52 can be pushed away from the through hole 31 to lift the pump 61 out from the through hole 31.

[0046] like Figure 1 As shown, in an embodiment of this utility model, the gas collection device includes: an outlet pipe 41 and a gas collection box 42. The first end of the outlet pipe 41 extends through the cover plate 3 into the secondary sedimentation tank 1, and the second end of the outlet pipe 41 is connected to the gas collection box 42 to collect odorous gas.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A closed type automatic sludge discharge device, characterized by comprising: The utility model relates to a two-sedimentation tank, which comprises a pair of rails arranged along the length direction of the two-sedimentation tank; a chain scraper for scraping sludge, which moves along the pair of rails, wherein the chain scraper is a corrosion-resistant chain scraper; a cover plate arranged on the two-sedimentation tank to seal the two-sedimentation tank; and a gas collecting device, part of which extends into the two-sedimentation tank through the cover plate, for collecting gas in the two-sedimentation tank. The bottom surface of the two-sedimentation tank is paved with a steel plate, which comprises a first steel plate and a second steel plate connected together, wherein the first steel plate is arranged obliquely, and the second steel plate is arranged horizontally, and the distance between the second steel plate and the cover plate is greater than the distance between the first steel plate and the cover plate. The two-sedimentation tank has opposite first and second inner walls, wherein the first inner wall is adjacent to the first steel plate, and the second inner wall is adjacent to the second steel plate. The utility model further comprises a plurality of pumps arranged along the length direction of the two-sedimentation tank, wherein the plurality of pumps are arranged on the second steel plate; a plurality of sludge discharge pipes, wherein the first end of each sludge discharge pipe is in communication with one of the pumps, and the second end of each sludge discharge pipe extends out of the two-sedimentation tank through the second inner wall. The utility model further comprises a plurality of cleaning pipes, wherein each cleaning pipe is in communication with one of the sludge discharge pipes; a plurality of control valves, wherein each control valve is arranged in one of the cleaning pipes; and a controller electrically connected to the control valves, wherein the controller is configured to control the control valves to open when the sludge discharge pipes are in communication with an external water source.

2. The closed automatic sludge discharge device according to claim 1, characterized in that The outlet of each cleaning pipe is directed towards the second inner wall. The utility model further comprises a plurality of cleaning mechanisms, wherein the plurality of cleaning mechanisms are arranged at intervals with the plurality of pumps, and each cleaning mechanism is configured to flush the sludge on the second steel plate.

3. The closed automatic sludge discharge device according to claim 2, characterized in that Each cleaning mechanism comprises a main pipe having a bend, wherein the first end of the main pipe is connected to the second steel plate, and the second end of the main pipe extends out of the two-sedimentation tank; and a plurality of branch pipes, wherein the first end of each branch pipe is in communication with the main pipe, and the second end of each branch pipe is directed towards the second inner wall or a wall surface adjacent to the second inner wall. Each branch pipe is arranged obliquely with the main pipe, and the second end of each branch pipe is arranged downward. The utility model further comprises a plurality of moving mechanisms, wherein the cover plate is provided with a plurality of through holes along the length direction of the cover plate, each through hole is aligned with one of the pumps, the size of each through hole is greater than the size of the pump, and each moving mechanism is arranged in one-to-one correspondence with one of the pumps.

4. The closed automatic sludge discharge device according to claim 3, characterized in that Each moving mechanism comprises a slide rail arranged in the two-sedimentation tank; and a moving plate, wherein the size of the moving plate is greater than the size of the through hole, and the moving plate is in sliding connection with the slide rail to close or open the through hole. The gas collecting device comprises an air outlet pipe, wherein the first end of the air outlet pipe extends into the two-sedimentation tank; and a gas collecting tank in communication with the second end of the air outlet pipe. ​ ​ 5. The closed automatic sludge discharge device according to claim 4, characterized in that ​ 6. The closed automatic sludge discharge device according to claim 3, characterized in that ​ 7. The closed automatic sludge discharge device according to claim 6, characterized in that ​ ​ ​ 8. The closed automatic sludge discharge device according to claim 7, characterized in that ​ 9. The closed automatic sludge discharge device according to claim 3, characterized by ​ ​ ​ ​ 10. The closed automatic sludge discharge device according to claim 1, characterized by ​ ​ ​

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