A Type A sludge discharge device and sludge discharge system for sludge discharge

Abstract

The present invention discloses a type-A sludge discharging device for sludge discharge, which includes a sludge discharge pipe and an air delivery pipeline horizontally suspended at the bottom of a water treatment sedimentation tank. The air delivery pipeline is provided with air injection holes for flushing the sediment at the bottom of the sedimentation tank. The sludge discharge pipe is of type-A, with the tip upward. The upper part of the type-A sludge discharge pipe is a triangular pipe body, and the bottom wall of the pipe body is provided with sludge suction holes. The lower part is a plate covering the sludge suction holes, and the plate is of full length. The air delivery pipeline is arranged below the plate. The present invention also discloses a sludge discharging system, where the pipe body is connected to a sludge discharge valve or connected to a conveying trough through a sludge lifting pipe. On the one hand, by setting the sludge discharge pipe as a type-A pipe with the tip upward, it is beneficial for the settled sludge to slide down, avoiding sludge accumulation on the pipe body and the plate. On the other hand, the bottom wall of the pipe body is horizontally arranged, and the sludge suction holes opened on the bottom wall have a low suction distance and a large suction surface, and the air-swept suction is thorough, capable of discharging the accumulated sludge at the bottom of the sedimentation tank completely, and effectively solving and eliminating the problem of water body odor pollution caused by sludge accumulation.

Description

Technical Field

[0001] The present invention relates to the field of sludge discharge in reaction tanks, sedimentation tanks, grit chambers and other sediment accumulation sections in environmental protection water supply and drainage treatment. More specifically, it relates to an A-type sludge discharge device and a sludge discharge system for sludge discharge. Background Art

[0002] The sludge discharge process is one of the important water treatment processes. Its main purpose is to cooperate with the sedimentation treatment process to timely remove the accumulated sludge at the bottom of the water treatment structure, and avoid problems such as the malfunction of the water treatment system and unqualified effluent caused by the untimely removal of the accumulated sludge at the bottom of the tank.

[0003] Currently, the commonly used sludge discharge method is that the sludge discharge device is located below the sedimentation device. The sludge sedimented by the sedimentation device accumulates at the bottom of the tank and is discharged through the perforated sludge discharge pipe. The traditional perforated sludge discharge pipe is a round pipe, and part of the sedimented sludge will accumulate on the round pipe, which is not easy to fall off and difficult to clean. Long-term accumulation not only causes sludge residue and incomplete sludge discharge, but also causes the suction holes to be blocked, unable to achieve the sludge discharge function. In addition, due to the small sludge suction surface and the high suction distance from the sediment interface at the bottom of the tank of the traditional sludge discharge pipe, it is impossible to suck the sludge layer at the bottom interface of the tank clean or thoroughly suck the sludge layer at the bottom of the tank, resulting in the accumulation of silt at the bottom of the tank. Seriously, it will cause the water treatment engineering facilities to be unable to operate normally or even collapse due to silt accumulation; especially for water supply facilities (especially water treatment plants), the accumulation of silt is extremely likely to cause anaerobic odor of the silt, seriously affecting the effluent quality, water volume, drinking water hygiene and health, and safe water supply. Summary of the Invention

[0004] The purpose of the present invention is to provide an A-type sludge discharge device and a sludge discharge system for sludge discharge. On the one hand, by setting the sludge discharge pipe as an A-type pipe with the tip upward, it is extremely beneficial for the sedimented sludge to slide down, avoiding the accumulation of sludge on the pipe body and the plate. On the other hand, the bottom wall of the sludge discharge pipe is horizontally arranged, and the sludge suction holes opened on the bottom wall have a low suction distance from the sediment interface at the bottom of the tank and a large sludge suction surface, and the air-swept suction is thorough, which can drain the accumulated sludge at the bottom of the sedimentation tank, effectively solve and eliminate the problem of water body odor pollution caused by sludge accumulation, improve the water quality and the taste of drinking water, and enhance the safety and health guarantee of the drinking water for the common people.

[0005] The present invention discloses an A-type sludge discharge device for sludge discharge, including a sludge discharge pipe horizontally suspended at the bottom of the water treatment sedimentation tank and an air delivery pipeline. The air delivery pipeline is provided with air injection holes for flushing the sediment at the bottom of the sedimentation tank. The sludge discharge pipe is in an A shape with the tip upward. The upper part of the A-type sludge discharge pipe is a triangular pipe body, and the bottom wall of the pipe body is provided with sludge suction holes. The lower part is a plate covering the sludge suction holes. The plate is of full length, and the air delivery pipeline is arranged below the plate.

[0006] Preferably, the pipe body is an isosceles triangle.

[0007] Preferably, the inclination angles of the two side walls of the pipe body are ≤80°.

[0008] Preferably, the mud suction holes are distributed along the axis of the mud discharge pipe, and the opening rate of the mud suction holes is ≤95%.

[0009] Preferably, the plate is formed by extending downwardly from the side wall of the tube body, and the inclination angle of the plate is the same as the inclination angle of the side wall of the tube body.

[0010] Preferably, the plates are symmetrically arranged along the axis of the mud discharge pipe.

[0011] Preferably, the gas pipeline is attached to the lower end surface of the plate and laid along the length direction of the plate, and the gas holes are distributed axially along the gas pipeline, and the gas holes are inclined downward and toward the closed space formed by the plate.

[0012] Preferably, the mud discharge pipe is installed on the bottom of the pool through a height-adjustable bracket, which includes a mounting plate, a screw and a nut arranged on the plate. The mounting plate is horizontally arranged at the side end of the plate, one end of the screw is fixed to the bottom of the pool, and the other end passes through a hole in the mounting plate and is fixed by a nut.

[0013] The invention also discloses a mud discharge system, wherein one end of a pipe body is closed, and the other end is extended out of the pool to connect with a mud discharge valve. At this time, the mud in the pipe body is discharged through the mud discharge valve.

[0014] Alternatively, a sludge discharge system, in which one end of the pipe body is closed and the other end is connected to a conveying trough through a sludge lifting pipe. The sludge lifting pipe is located in the pool and placed vertically. The sludge in the pipe body is discharged through the sludge lifting pipe and the conveying trough in turn. At this time, the pool body has no holes.

[0015] The working process of the present invention is as follows: the gas with a certain pressure ejected from the air hole impacts and stirs the sludge layer, causing the sludge layer to float and become soft and easy to absorb; at the same time, the pressure difference is used to make the soft and easy to absorb sludge automatically enter the pipe body from the sludge suction hole under the action of gas stirring, and finally enter the conveying trough through the sludge discharge valve outside the pool or through the sludge lifting pipe for discharge.

[0016] Beneficial effects of the present invention:

[0017] 1. The present invention sets the mud discharge pipe as an A-type pipe with the tip at the top, which is conducive to the sliding of the settled mud and avoids mud accumulation on the pipe body and the plate.

[0018] 2. The bottom wall of the pipe body is set horizontally, and the mud suction holes opened on the bottom wall have a low suction distance from the mud interface at the bottom of the pool, a large mud suction surface, and thorough air sweeping and suction, which can drain the mud at the bottom of the pool.

[0019] 3. Plates are arranged below the mud suction holes to not only prevent bubbles from rising and impacting the suspended matter in the water treatment pool and thus destroying the normal operation of the water purification treatment, but also enable the gas to flow in the space below the plates to form the required gas impact force and negative pressure difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of one end structure of the sludge discharging device.

[0021] Figure 2 Schematic diagram of the other end structure of the sludge discharging device.

[0022] Figure 3 Front view of the sludge discharging device.

[0023] Figure 4 For Figure 3 Cross-sectional view taken along the A-A direction in

[0024] Figure 5 The first embodiment of the sludge discharging system.

[0025] Figure 6 For Figure 5 Partial enlarged view of B in

[0026] Figure 7 The second embodiment of the sludge discharging system.

[0027] Identifications in the figure: sedimentation tank 1, pipe body 2, bottom wall 21, sludge suction holes 22, left side wall 231, right side wall 232, gas transmission pipeline 3, gas injection holes 31, pressure gas pipeline 32, plate 4, bracket 5, screw 52, nut 53, sludge discharge valve 6, sludge lifting pipe 7, conveying trough 8. Detailed implementation manners

[0028] The following further describes the structures involved in the present invention or the technical terms used herein. These descriptions are only examples to illustrate how the present invention is implemented and shall not constitute any limitation to the present invention.

[0029] As Figure 1-5 shown, a type-A sludge discharging device for sludge discharge includes a sludge discharge pipe 2 horizontally suspended at the bottom of a water treatment sedimentation tank 1 and a gas transmission pipeline 3. The gas transmission pipeline 3 is provided with gas injection holes 31 for flushing the sediment at the bottom of the sedimentation tank. The sludge discharge pipe is of type-A with the tip upward. The upper part of the type-A sludge discharge pipe is a triangular pipe body 2, and the bottom wall 21 of the pipe body is provided with sludge suction holes 22. The lower part is a plate 4 covering the sludge suction holes 22, and the plate 4 extends throughout. The gas transmission pipeline 3 is arranged below the plate 4.

[0030] Both sides in the sedimentation tank 1 have slopes, and the pipe body 2 is located in the notch formed by the slopes on both sides. In this way, the sludge slides down along the slope and accumulates in the notch. The gas transmission pipeline 3 is connected with a pressure gas pipeline 32, and the pressure gas pipeline 32 extends along the end wall of the pipe body 2 to communicate with an external gas source ( Figure 2As shown in the figure, it is used to provide pressurized gas, which can be accessed from the pressure gas source of the water treatment plant or supplied by an air pump. The gas ejected from the gas injection holes 31 has a certain gas impact pressure. The huge impact force stirs up the sediment layer, making the sediment layer soft and easy to suck. At the same time, by using the pressure difference, the soft and easy-to-suck sludge automatically enters the pipe body 2 from the sludge suction holes 22 under the combined action of the water depth pressure and the gas impact force, achieving the purpose of sludge discharge.

[0031] On the one hand, by setting the sludge discharge pipe into an A-shaped pipe with the tip upward, the present invention is extremely beneficial for the settlement sludge to slide down, avoiding sludge accumulation in the pipe body 2 and the plate 4. On the other hand, the bottom wall 21 of the pipe body is horizontally arranged, and the sludge suction holes 22 opened on the bottom wall 21 have a low suction distance from the sludge accumulation interface at the bottom of the pool, a large suction surface, and thorough air-swept suction, which can drain the sludge accumulated at the bottom of the pool, effectively solve and eliminate the problem of water body odor pollution caused by sludge accumulation, improve the water quality and the taste of drinking water, and enhance the safety and health guarantee of the people's drinking water. At the same time, a plate 4 is arranged below the sludge suction holes 22, which not only prevents the impact of the rising bubbles on the suspended matter in the water treatment pool from floating up and destroying the normal operation of the water purification treatment, but also enables the gas to flow in the space below the plate 4, forming the required gas impact force and negative pressure difference.

[0032] As Figure 4 shown, the two side walls of the pipe body are respectively the left side wall 231 and the right side wall 232. The inclination angle α of the left side wall 231 ≤ 80°, and the inclination angle β of the right side wall 232 ≤ 80°, which is beneficial for the settlement sludge to slide down. Among them, the inclination angle is the angle between the side wall and the vertical line. The inclination angles of the two side walls of the pipe body can be the same or different. When they are different, for example, the inclination angle α of the left side wall 231 is 60°, and the inclination angle β of the right side wall 232 is 50°. Of course, the inclination angles of the two side walls can also be other settings. In this embodiment, the pipe body 2 is an isosceles triangle, and the inclination angles of the two side walls can be 40°, 50°, 60°, 70°, 80°, etc. In this way, not only the sludge sliding amplitude on both sides is consistent, but also the stability of the entire device is higher.

[0033] As Figure 1 and 2 shown, the opening ratio of the sludge suction holes 22 ≤ 95%, specifically, it can be 65%, 75%, 85%, 95%, etc. A large opening ratio is beneficial for increasing the sludge suction speed and improving the sludge suction volume. The sludge suction holes 22 are distributed along the axial direction of the pipe body 2. In this way, sludge suction can be carried out throughout the entire length direction of the pipe body 2. The size, quantity, and arrangement form of the sludge suction holes 22 are not limited. In this embodiment, the arrangement form of the sludge suction holes 22 is equally spaced distribution, and the sludge suction is more uniform.

[0034] As Figure 4As shown, the two side plates 4 are arranged to slope downwards, forming a closing structure that covers above the sludge suction holes 22 and is used to prevent gas from overflowing. The plates 4 are arranged along the entire length, which means the plates 4 are arranged along the axis of the pipe body 2. The inclination angle of the plates 4 can be the same as or different from the inclination angle of the side wall of the pipe body 2. When they are the same, the deposited sludge slides down smoothly, avoiding sludge accumulation on the plates 4. When they are different, the inclination angle of the plates 4 is less than the inclination angle of the side wall of the pipe body 2, so as to prevent sludge accumulation on the plates 4. In this embodiment, the pipe body 2 is an isosceles triangular pipe, and the plates 4 extend downward from the side wall of the pipe body. The inclination angle of the plates 4 is the same as the inclination angle of the side wall of the pipe body. If the inclination angles of the two side walls are 40°, 50°, 60°, etc., then the inclination angles of the plates 4 are correspondingly 40°, 50°, 60°, etc. In this embodiment, the two side plates 4 are symmetrically arranged along the axis of the pipe body 2, and the symmetrical arrangement of the plates 4 ensures uniform sludge suction on both sides of the pipe body 2. The material of the plates 4 is not limited, such as metal, plastic, cement, etc. The width of the plates 4 is appropriate, not too wide to avoid too high a suction distance, nor too narrow to avoid gas overflow.

[0035] In this embodiment, the gas transmission pipeline 3 is closely attached to and fixed on the lower end surface of the plates 4 and is laid along the length direction of the plates 4. The jet holes 31 are distributed along the axis of the gas transmission pipeline 3 to ensure that the sludge suction covers the entire length of the pipe body 2. See Figure 2 . The jet holes 31 slope downward and face the closing space formed by the two side plates 4, so that it has the function of jetting air to sweep the sludge and floating it into the pipe. The size and number of the jet holes 31 are not limited.

[0036] As Figure 5 shown, the sludge discharge pipe is stably installed on the bottom of the pool through a height-adjustable bracket 5. In this embodiment, the height-adjustable bracket 5 includes a mounting plate 51 provided on the plate 4, a screw 52 and a nut 53. The mounting plate 51 is horizontally arranged at the side end of the plate 4. One end of the screw 52 is fixed to the bottom of the pool, and the other end passes through the through hole of the mounting plate 51 and is fixed by the nut 53. See Figure 6 . The height of the sludge discharge pipe can be adjusted through the bracket 5. The distance between the sludge discharge pipe and the bottom of the pool can be determined according to the amount of sludge discharge, but the sludge discharge pipe should be located above the sludge accumulation interface and close to the sludge accumulation interface, so that the suction distance is minimized, thereby effectively sucking out all the sludge.

[0037] The present invention also discloses a sludge discharge system. One end of the pipe body 2 is closed, and the other end extends out of the pool and is connected to a sludge discharge valve 6. At this time, the sludge in the pipe body 2 is discharged through the sludge discharge valve 6. See Figure 5 .

[0038] Alternatively, a sludge discharge system, one end of the pipe body 2 is closed, and the other end is communicated with a conveying trough 8 through a sludge lifting pipe 7. The sludge lifting pipe 7 is located in the pool and is vertically arranged. The sludge in the sludge discharge pipe 2 is discharged through the sludge lifting pipe 7 and the conveying trough 8 in sequence. At this time, no hole is opened on the pool body. See Figure 7 .

[0039] Working process of the present invention: The gas with a certain pressure ejected from the gas injection holes 31 impacts and stirs the sediment layer, making the sediment layer float and turn into a soft and easy-to-absorb state. At the same time, using the pressure difference, the soft and easy-to-absorb sludge automatically enters the pipe body 2 through the sludge suction holes under the action of gas stirring, and finally is discharged through the sludge discharge valve 6 outside the pool or enters the conveying trough 8 through the sludge lifting pipe 7.

[0040] The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept of the present invention.

Claims

1. A type-A sludge discharge device for sludge discharge, comprising a sludge discharge pipe horizontally suspended at the bottom of a water treatment sedimentation tank and a gas transmission pipeline. The gas transmission pipeline is provided with injection air holes for flushing the sludge at the bottom of the sedimentation tank, and is characterized in that : The sludge discharge pipe is in an A shape with the tip upward. The upper part of the A-shaped sludge discharge pipe is a triangular pipe body, and the bottom wall of the pipe body is provided with sludge suction holes. The lower part is a plate covering the sludge suction holes, and the plate is of full length. The air delivery pipeline is arranged below the plate. The pipe body is an isosceles triangle, and the inclination angles of the two side walls of the pipe body are ≤ 80°. The plate is formed by extending downward from the side wall of the pipe body. The inclination angle of the plate is the same as or different from that of the side wall of the pipe body. When they are different, the inclination angle of the plate is smaller than that of the side wall of the pipe body.

2. The A-type sludge discharge device for sludge discharge according to claim 1, characterized in that : The sludge suction holes are distributed along the axial direction of the pipe body, and the opening ratio of the sludge suction holes is ≤ 95%.

3. The A-type sludge discharge device for sludge discharge according to claim 1, characterized in that : The plates are symmetrically arranged along the axis of the pipe body.

4. The A-type sludge discharge device for sludge discharge according to claim 1, characterized in that : The air delivery pipeline is attached to the lower end face of the plate and laid along the length direction of the plate. The air injection holes are distributed along the axial direction of the air delivery pipeline, and the air injection holes are inclined downward and face the closed space formed by the plate.

5. The A-type sludge discharging device for sludge discharge according to claim 1, characterized in that : The sludge discharge pipe is installed on the bottom of the pool through a bracket with adjustable height. The bracket includes a mounting plate arranged on the plate, a screw rod and a nut. The mounting plate is horizontally arranged at the side end of the plate. One end of the screw rod is fixed to the bottom of the pool, and the other end passes through the through hole of the mounting plate and is fixed by the nut.

6. A sludge discharging system, characterized in that : An A-shaped sludge discharge device for sludge discharge including any one of claims 1-5, wherein one end of the pipe body of the sludge discharge pipe is closed, and the other end extends out of the pool and is connected to a sludge discharge valve. Or, one end of the pipe body is closed, and the other end is communicated with a conveying trough through a sludge lifting pipe. The sludge lifting pipe is located in the pool and is vertically placed.

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