A sludge discharge system for an aerated grit chamber

Abstract

The utility model discloses a kind of sludge discharging systems for aeration grit chamber, including the pool body with pool cover, the aeration device being set in pool body, the mud gathering mechanism being set in the bottom of pool body, the flow guide mechanism being set in the bottom of pool body and being communicated with mud gathering mechanism arrangement and the sedimentation mechanism being communicated with the output end of flow guide mechanism arrangement, flow guide groove is communicated and arranged on the pool body, the mud gathering mechanism includes the mud gathering groove being arranged in the bottom of pool body and spiral shaft, the flow guide mechanism includes the guide groove being arranged in the bottom of pool body and being communicated with one side of mud gathering groove and first suction dredger;The side of the sedimentation mechanism is communicated with pool body by pumping unit, and the other side is communicated with anaerobic tank by sludge discharge component arrangement.The utility model is equipped with pool body and sedimentation groove, and the mud and sand deposited after aeration treatment in pool body is discharged into sedimentation groove, and the water separated out is discharged back to pool body, and the sludge separated out is supplemented into anaerobic tank, which not only can improve the degradation efficiency of organic matter, but also can reduce the energy consumption of sewage treatment.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a sludge removal system for an aerated grit chamber. Background Technology

[0002] Existing technology uses a scraper to push the mud and sand at the bottom of the aeration sand-scraping tank to one side of the aeration sand-scraping tank, and then filters it through the sand discharge tank. Because the sewage contains a lot of mud and sand, the thickness of the sediment at the bottom of the aeration sand-scraping tank is relatively large, which makes the scraper easy to break and the drive device that drives the scraper easy to be damaged. As a result, the continuous operation of sewage purification is seriously affected. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an aerated grit chamber that facilitates rapid sludge discharge and helps reduce the organic matter content of sludge and sand.

[0004] To solve the above-mentioned technical problems, the present invention provides a sludge removal system for an aerated grit chamber, comprising a chamber body with a cover, an aeration device disposed within the chamber body, a sludge-gathering mechanism disposed at the bottom of the chamber body, a flow guiding mechanism disposed at the bottom of the chamber body and connected to the sludge-gathering mechanism, and a sedimentation mechanism connected to the output end of the flow guiding mechanism. A sealed flow guiding channel connected to the outlet is provided at the upper part of the chamber body. The sludge-gathering mechanism includes a sludge-gathering trough disposed at the bottom of the chamber body and a spiral shaft disposed within the sludge-gathering trough. The flow guiding mechanism includes a guide channel disposed at the bottom of the chamber body and connected to one side of the sludge-gathering trough, and a first sludge suction machine disposed outside the chamber body corresponding to the position of the guide channel. One side of the sedimentation mechanism is connected to the chamber body via a pumping component, and the other side is connected to the anaerobic tank via a sludge discharge component.

[0005] With the above structure, the aerated wastewater flows into the primary sedimentation tank through the outlet at the top of the tank and the sealed guide channel. The sludge in the tank is continuously pushed to the guide mechanism inside the tank by the sludge collection mechanism, and then enters the sedimentation mechanism. In the sedimentation mechanism, particulate matter in the mixed wastewater is further removed, reducing its suspended solids concentration. The sludge is then pumped back into the tank for aeration treatment by the pumping component. At the same time, the sludge containing a large amount of organic matter after sedimentation can be guided back to the anaerobic tank by the sludge discharge component, providing energy and nutrients for the growth of anaerobic microorganisms and reducing the energy consumption of wastewater treatment. This not only helps remove particulate matter from the wastewater, but also improves the degradation efficiency of organic matter in the anaerobic tank by timely replenishing sludge.

[0006] To improve the efficiency of aeration treatment, preferably, the aeration device includes a blower fixed on the pool cover, a first air outlet pipe connected to the blower and extending downward through the pool cover, and a branch pipe connected to the outlet end of the first air outlet pipe. The branch pipe is arranged along the axial direction of the pool body, and several air distribution pipes arranged along the longitudinal direction of the pool body are connected to the branch pipe. Multiple aeration pipes are connected along the axial direction of each air distribution pipe.

[0007] To facilitate sludge accumulation, preferably, the sludge accumulation mechanism also includes an inclined wall provided at the lower part of the side wall of the pool, the sludge accumulation trough is connected to the pool along the axial direction of the pool, and one side of the spiral shaft is connected to the output end of a motor provided on the outside of the pool.

[0008] To avoid interfering with the movement of sludge, preferably, the upper end of the guide channel is connected to the pool body, and the bottom of the guide channel is a sloping structure, with the feed end of the first sludge suction machine located at the lower end of the sloping structure.

[0009] To facilitate leveling the sludge in the sedimentation tank, preferably, the sedimentation mechanism includes a sedimentation tank located on the outside of the tank body and connected to the discharge end of the first sludge suction machine, and a pushing device located on the upper part of the sedimentation tank. The pushing device includes a servo motor located on the sedimentation tank, a lead screw connected to the output end of the servo motor, a fixing block screwed to the lead screw, a linear motor fixed on the fixing block, and a push plate connected to the output end of the linear motor. A guide rod is provided at the opening of the sedimentation tank, and one side of the fixing block passes through the guide rod.

[0010] To simplify the structure and facilitate installation, preferably, the pumping assembly includes a pump located on one side of the sedimentation tank opening, with a drain pipe connected to the outlet of the pump, and the drain pipe passing through the tank cover and communicating with the tank body.

[0011] To facilitate rapid sludge removal, preferably, the sludge removal assembly includes a second sludge suction machine located outside the sedimentation tank. A transition inclined wall is provided on the inner wall of the sedimentation tank on one side. The feed end of the second sludge suction machine extends into the sedimentation tank and is connected to the lower end of the transition inclined wall. The discharge end of the second sludge suction machine is connected to the anaerobic tank.

[0012] To facilitate proper dilution of the sludge returned to the anaerobic tank and to facilitate the discharge of excess sludge, preferably, a sludge discharge pipe is connected to the discharge end of the second sludge suction machine. The discharge end of the sludge discharge pipe is connected to a dilution tank, and a pressure pump is connected to the dilution tank. The output end of the pressure pump is connected to the anaerobic tank via a receiving pipe. A discharge valve is connected to the receiving pipe, and a check valve is connected to the receiving pipe at a position corresponding to the discharge valve and the anaerobic tank.

[0013] To facilitate deodorization of the air inside the pool, preferably, a second air outlet pipe is provided on the pool cover, and the outlet end of the second air outlet pipe is connected to an activated carbon adsorption cylinder fixed on the pool cover.

[0014] Beneficial effects: This utility model is equipped with a pool and a sedimentation tank. After aeration treatment in the pool, the sediment deposited mud and sand are discharged into the sedimentation tank, the settled water is discharged back into the pool, and the settled sludge is added to the anaerobic tank. This not only improves the degradation efficiency of organic matter, but also reduces the energy consumption of sewage treatment. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 Top view.

[0017] Figure 3 This is a schematic diagram of the installation structure of the pool.

[0018] Figure 4 This is a schematic diagram of the installation structure of the sedimentation tank.

[0019] The meanings of the labels in the attached diagram are as follows: Pool body-1; Pool cover-10; Second vent pipe-101; Activated carbon adsorption cylinder-102; Sludge collection tank-11; Spiral shaft-12; Guide groove-13; First sludge suction machine-14; Inclined wall-15; Motor-16; Blower-2; First air outlet pipe-20; Branch pipe-21; Air distribution pipe-22; Aeration pipe-23; Sedimentation tank-3; Servo motor-30; Lead screw-31; Fixing block-32; Linear motor-33; Push plate-34; Guide rod-35; Second sludge suction machine-36; Pump - 4; Drainage pipe - 40; Transition inclined wall - 41; Sewage pipe - 42; Dilution tank - 43; Pressure pump - 44; Material receiving pipe - 45; Discharge valve - 46; Check valve - 47; Guide channel - 7. Detailed Implementation

[0020] like Figures 1 to 4As shown, this utility model includes a pool body 1 with a pool cover 10, an aeration device installed inside the pool body 1, a sludge-gathering mechanism installed at the bottom of the pool body 1, a flow guiding mechanism installed at the bottom of the pool body 1 and connected to the sludge-gathering mechanism, and a sedimentation mechanism connected to the output end of the flow guiding mechanism. A sealed flow guiding channel 7 connected to the outlet is provided at the upper part of the pool body 1. The sludge-gathering mechanism includes a sludge-gathering trough 11 installed at the bottom of the pool body 1 and a spiral shaft 12 installed inside the sludge-gathering trough 11. The flow guiding mechanism includes a guide channel 13 installed at the bottom of the pool body 1 and connected to one side of the sludge-gathering trough 11, and a first sludge suction machine 14 installed outside the pool body 1 and corresponding to the position of the guide channel 13. One side of the sedimentation mechanism is connected to the pool body 1 by a water pumping component, and the other side is connected to an anaerobic tank (not shown) by a sludge discharge component.

[0021] Specifically, the aeration device includes a blower 2 fixed on the pool cover 10, a first air outlet pipe 20 connected to the blower 2 and extending downward through the pool cover 10, and a branch pipe 21 connected to the outlet end of the first air outlet pipe 20. The branch pipe 21 is arranged along the axial direction of the pool body 1, and several air distribution pipes 22 arranged along the longitudinal direction of the pool body 1 are connected to the branch pipe 21. Multiple aeration pipes 23 are connected along the axial direction of each air distribution pipe 22.

[0022] The sludge-gathering mechanism also includes an inclined wall 15 provided at the lower part of the side wall of the pool body 1, the sludge-gathering trough 11 is connected to the pool body 1 along the axial direction of the pool body 1, and one side of the spiral shaft 12 is connected to the output end of the motor 16 provided on the outside of the pool body 1.

[0023] The upper end of the guide groove 13 is connected to the pool body 1. The bottom of the guide groove 13 is a sloping structure, and the feeding end of the first sludge suction machine 14 is located at the lower end of the sloping structure.

[0024] The sedimentation mechanism includes a sedimentation tank 3 located outside the tank body 1 and connected to the discharge end of the first sludge suction machine 14, and a pushing device located on the upper part of the sedimentation tank 3. The pushing device includes a servo motor 30 located on the sedimentation tank 3, a lead screw 31 connected to the output end of the servo motor 30, a fixing block 32 screwed to the lead screw 31, a linear motor 33 fixed on the fixing block 32, and a push plate 34 connected to the output end of the linear motor 33. A guide rod 35 is provided at the opening of the sedimentation tank 3, and one side of the fixing block 32 passes through the guide rod 35.

[0025] The pumping assembly includes a pump 4 installed on one side of the opening of the sedimentation tank 3. The outlet end of the pump 4 is connected to a drain pipe 40, which passes through the tank cover 10 and is connected to the tank body 1.

[0026] The sludge removal assembly includes a second sludge suction machine 36 disposed outside the sedimentation tank 3. A transition inclined wall 41 is provided on the inner wall of the sedimentation tank 3. The feed end of the second sludge suction machine 36 extends into the sedimentation tank 3 and is connected to the lower end of the transition inclined wall 41. The discharge end of the second sludge suction machine 36 is connected to the anaerobic tank.

[0027] A sewage pipe 42 is connected to the discharge end of the second sludge suction machine 36. A dilution tank 43 is connected to the discharge end of the sewage pipe 42. A pressure pump 44 is connected to the dilution tank 43. The output end of the pressure pump 44 is connected to the anaerobic tank via a receiving pipe 45. A discharge valve 46 is connected to the receiving pipe 45. A check valve 47 is connected to the receiving pipe 45 at a position corresponding to the discharge valve 46 and the anaerobic tank.

[0028] A second vent pipe 101 is connected to the pool cover 10, and the vent end of the second vent pipe 101 is connected to the activated carbon adsorption cylinder 102 fixed on the pool cover 10.

[0029] The working principle of this utility model is as follows: like Figures 1 to 4 As shown, blower 2 is turned on first. Gas is discharged from the air hole on aeration pipe 23 through the first air outlet pipe 20, branch pipe 21 and air distribution pipe 22, forming bubbles in the water in tank 1, thereby achieving the purpose of aeration treatment. The water after aeration treatment flows into the primary sedimentation tank (not shown) through the water outlet at the top of tank 1 and the closed guide channel 7.

[0030] As the aeration process proceeds, the sludge and sand in the wastewater gradually sink and collect in the sludge collection tank 11 along the inclined wall 15, continuously forming an accumulation along the inclined wall 15. At this time, since the upper end of the guide channel 13 is also connected to the tank body 1, some sludge and sand have also been deposited in the guide channel 13. Since the sludge collection tank 11 and the guide channel 13 are connected, the first sludge suction machine 14 is started first to suck out the deposited sludge and sand at the lower end of the guide channel 13, which will also carry some water. Then, the motor 16 is turned on, and the spiral shaft 12 rotates in the sludge collection tank 11 to push the sludge and sand in the sludge collection tank 11 into the guide channel 13, thereby discharging the sludge and sand in the tank body 1.

[0031] The mud and sand discharged by the first sludge suction machine 14 are guided into the sedimentation tank 3. In order to prevent local accumulation at the inflow position in the sedimentation tank 3 and prevent more mud and sand from entering the sedimentation tank 3, the servo motor 30 needs to be started. The lead screw 31 rotates and drives the fixed block 32 to move horizontally along the axial direction of the guide rod 35, thereby driving the push plate 34 to move synchronously and level the mud and sand at the inlet position of the sedimentation tank 3. As the accumulation height of the mud and sand increases, the length of mud and sand that needs to be leveled at the same height also increases. Since there is a continuous inflow of mud and sand during the movement of the push plate 34, in order to avoid the push plate 34 being damaged due to high resistance, the linear motor 33 is started to drive the push plate 34 to move upward a certain distance, so as to achieve the purpose of gradually leveling and spreading the mud and sand in the sedimentation tank 3 from bottom to top.

[0032] After each sedimentation of mud and sand in sedimentation tank 3, pump 4 is started to pump the filtered upper layer of water from the tank to drain pipe 40 and into pool 1. This water is then aerated again and flows into the primary sedimentation tank. This process is repeated. The sediment accumulated in sedimentation tank 3 is pumped out to sewage pipe 42 by second sludge suction machine 36 and enters dilution tank 43. After dilution treatment in dilution tank 43, discharge valve 46 is closed, check valve 47 is opened and pressure pump 44 is started to discharge the diluted mud and sand mixture into anaerobic tank through receiving pipe 45.

[0033] It should be noted that, in order to ensure that as little sediment as possible is carried out at the pumping point, the level height of the sediment should not exceed half the depth of the sedimentation tank 3. If there is a lot of sediment in the guide trough 13 and the mud collection trough 11, and the sediment in the sedimentation tank 3 cannot be treated in time, the second sludge suction machine 36 should be opened in time to pump it into the sewage pipe 42, and then enter the dilution tank 43 for temporary storage. At this time, the sediment is still in a solid-liquid mixed state. If the amount in the dilution tank 43 also increases and it is not suitable for timely dilution, the discharge valve 46 should be opened in time, the stop valve 47 should be closed, and the pressure pump 44 should be started to discharge the temporarily stored sediment in the dilution tank 43 through the discharge valve 46 for collection. If the collected sediment remains in a solid-liquid state, it can be poured into the sedimentation tank 3 to complete the sedimentation treatment. If it begins to dry (in the high temperature of summer), depending on the main components of the sediment, it can be sanitary landfilled or applied to farmland while meeting environmental protection requirements.

[0034] The dilution process in dilution tank 43 requires controlling the sludge return ratio to adjust the concentration of activated sludge, and this existing technology will not be described in detail here.

[0035] Throughout the entire process, the odor brought in by the sewage in the tank 1 flows out with the air through the second vent pipe 101. The odor particles contained therein are adsorbed and treated by the activated carbon adsorption cylinder 102. In addition, the sealed guide channel 7 can also prevent the water after aeration from directly carrying the odor around the tank 1. This not only purifies the air quality around the tank 1, but also solves the discomfort caused to the staff by the odor gas in a timely manner. The primary sedimentation tank has deodorization control measures, which will not be described in detail here.

[0036] In addition, the pool cover 10 is made of a visible material, preferably a glass plate, which makes it easy to observe the state of the water after aeration and to adjust the aeration output in a timely manner to improve the efficiency of aeration and sedimentation treatment.

Claims

1. A sludge removal system for an aerated grit chamber, characterized in that: The system includes a pool body (1) with a pool cover (10), an aeration device installed in the pool body (1), a sludge-gathering mechanism installed at the bottom of the pool body (1), a flow guiding mechanism installed at the bottom of the pool body (1) and connected to the sludge-gathering mechanism, and a sedimentation mechanism connected to the output end of the flow guiding mechanism. A closed flow guiding channel (7) connected to the outlet is provided at the upper part of the pool body (1). The sludge-gathering mechanism includes a sludge-gathering trough (11) installed at the bottom of the pool body (1) and a spiral shaft (12) installed in the sludge-gathering trough (11). The flow guiding mechanism includes a guide channel (13) installed at the bottom of the pool body (1) and connected to one side of the sludge-gathering trough (11) and a first sludge suction machine (14) installed on the outside of the pool body (1) and corresponding to the position of the guide channel (13). One side of the sedimentation mechanism is connected to the pool body (1) by a water pumping component, and the other side is connected to the anaerobic tank by a sludge discharge component.

2. The sludge removal system for an aerated grit chamber as described in claim 1, characterized in that: The aeration device includes a blower (2) fixed on the pool cover (10), a first air outlet pipe (20) connected to the blower (2) and extending downward through the pool cover (10), and a branch pipe (21) connected to the outlet end of the first air outlet pipe (20). The branch pipe (21) is arranged along the axial direction of the pool body (1), and several air distribution pipes (22) arranged along the longitudinal direction of the pool body (1) are connected to the branch pipe (21). Multiple aeration pipes (23) are connected along the axial direction of each air distribution pipe (22).

3. The sludge removal system for an aerated grit chamber as described in claim 1, characterized in that: The mud-gathering mechanism also includes an inclined wall (15) provided on the lower part of the side wall of the pool body (1), the mud-gathering trough (11) is connected to the pool body (1) along the axial direction of the pool body (1), and one side of the spiral shaft (12) is connected to the output end of the motor (16) provided on the outside of the pool body (1).

4. The sludge removal system for an aerated grit chamber as described in claim 1, characterized in that: The upper end of the guide groove (13) is connected to the pool body (1). The bottom of the guide groove (13) is a sloping structure, and the feeding end of the first sludge suction machine (14) is located at the lower end of the sloping structure.

5. A sludge removal system for an aerated grit chamber as described in claim 4, characterized in that: The sedimentation mechanism includes a sedimentation tank (3) located outside the tank body (1) and connected to the discharge end of the first sludge suction machine (14), and a pushing device located on the upper part of the sedimentation tank (3). The pushing device includes a servo motor (30) located on the sedimentation tank (3), a lead screw (31) connected to the output end of the servo motor (30), a fixing block (32) screwed to the lead screw (31), a linear motor (33) fixed on the fixing block (32), and a push plate (34) connected to the output end of the linear motor (33). A guide rod (35) is provided at the opening of the sedimentation tank (3), and one side of the fixing block (32) passes through the guide rod (35).

6. A sludge removal system for an aerated grit chamber as described in claim 5, characterized in that: The pumping assembly includes a pump (4) installed on one side of the outlet of the sedimentation tank (3). The outlet of the pump (4) is connected to a drain pipe (40), which passes through the tank cover (10) and is connected to the tank body (1).

7. A sludge removal system for an aerated grit chamber as described in claim 6, characterized in that: The sludge removal assembly includes a second sludge suction machine (36) located outside the sedimentation tank (3). The bottom of the sedimentation tank (3) is a sloping structure. A transition sloping wall (41) is provided on the inner wall of one side of the sedimentation tank (3). The feed end of the second sludge suction machine (36) extends into the sedimentation tank (3) and is connected to the lower end of the sedimentation tank (3). The discharge end of the second sludge suction machine (36) is connected to the anaerobic tank.

8. A sludge removal system for an aerated grit chamber as described in claim 7, characterized in that: A sewage pipe (42) is connected to the discharge end of the second sludge suction machine (36). A dilution tank (43) is connected to the discharge end of the sewage pipe (42). A pressure pump (44) is connected to the dilution tank (43). The output end of the pressure pump (44) is connected to the anaerobic tank via a receiving pipe (45). A discharge valve (46) is connected to the receiving pipe (45). A stop valve (47) is connected to the receiving pipe (45) at the position between the discharge valve (46) and the anaerobic tank.

9. A sludge removal system for an aerated grit chamber as described in claim 1, characterized in that: A second vent pipe (101) is connected to the pool cover (10), and the vent end of the second vent pipe (101) is connected to the activated carbon adsorption cylinder (102) fixed on the pool cover (10).

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