CN215653967U

CN215653967U - Mud-water separation system with backwashing function

Info

Publication number: CN215653967U
Application number: CN202122351506.5U
Authority: CN
Inventors: 何京钟; 肖波; 孙竟; 李宗华; 刘羿; 唐宇
Original assignee: CSCEC Scimee Sci and Tech Co Ltd
Current assignee: CSCEC Scimee Sci and Tech Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-01-28
Anticipated expiration: 2031-09-27

Abstract

The utility model relates to a sludge-water separation system with a backwashing function, which comprises a sedimentation tank and is characterized by also comprising a gas stripping mechanism, a gas backwashing mechanism and a controller, wherein the gas stripping mechanism is communicated with the sedimentation tank; the system has the advantages of compact structure, more reasonable design and controllable whole backwashing process, can automatically clean the sedimentation tank, avoid the blockage of the filler and/or the sedimentation tank, and can not influence the water quality of discharged water and the normal operation of the system due to the discharge of sludge.

Description

Mud-water separation system with backwashing function

Technical Field

The utility model relates to the technical field of sewage treatment equipment, in particular to a mud-water separation system with a backwashing function.

Background

A typical sewage treatment process usually adopts an activated sludge or biological membrane process, a sludge-water separation system is required to be arranged at the rear end of the sewage treatment process so as to separate sludge, and the sludge-water separation effect usually affects the operation of the whole system; in the prior art, in order to reduce the occupied area, a sedimentation tank for separating sludge from water in a general sewage treatment plant or integrated sewage treatment equipment needs to be provided with an inclined pipe (plate) or similar filler to improve the load, but after the sedimentation tank runs for a long time, the sludge usually can be attached to the filler and the tank wall in a large amount and is accumulated at the bottom of the tank, so that the filler and the sedimentation tank are easy to block, the problems of unsmooth sludge backflow, sludge floating and the like can be caused, and the water outlet effect and the stable running of the system are seriously influenced.

In order to solve the problem, some backwashing design schemes for cleaning a sedimentation tank are disclosed in the prior art, but in the actual operation process, some defects generally exist, for example, an inclined tube sedimentation device with a sludge gas washing function disclosed in chinese patent CN 212491698U, an inclined tube sedimentation tank of an inclined tube flushing device disclosed in chinese patent CN 206152408U, and the like, all adopt the gas washing function to backwash an inclined plate (tube) in the sedimentation tank, but in the gas backwashing process, the liquid level in the sedimentation tank can be lifted, so that muddy water mixed liquid is easily caused to enter the next process section, such as a clean water tank or a disinfection tank, and the quality of effluent water is influenced; for another example, in the anti-clogging device for a sewage inclined plate sedimentation tank and the application method thereof disclosed in chinese patent CN 111514621 a, in order to clean the inclined tube, a sludge discharge manner is required to be adopted to reduce the liquid level, the height of the reduced liquid level is usually 10-20cm, but the sludge discharge process usually causes a large amount of sludge to be lost, and for the system at the initial operation stage or with a low sludge concentration, the operation manner seriously affects the normal operation of the whole system; therefore, the prior art needs a backwashing scheme which is more reasonable and reliable, does not affect the quality of the effluent water and the normal operation of the system to clean the sedimentation tank.

Disclosure of Invention

The utility model aims to solve the problems that the backwashing design scheme for cleaning a sedimentation tank disclosed by the prior art is not reasonable enough in design and the washing process can influence the effluent quality or the normal operation of the system, and provides a sludge-water separation system with more reasonable design, which can automatically clean the sedimentation tank, avoid the blockage of a filler and the sedimentation tank and can not influence the effluent quality and the normal operation of the system, and has the main conception that:

a mud-water separation system with backwashing function comprises a sedimentation tank for providing a sedimentation space,

also comprises a gas stripping mechanism, a gas backwashing mechanism and a controller, wherein,

the air stripping mechanism is communicated with the sedimentation tank,

the gas backwashing mechanism comprises a backwashing pipe arranged in the sedimentation tank, an air inlet pipe communicated with the backwashing pipe and a first control component for controlling the on/off of the air inlet pipe, the backwashing pipe is provided with a plurality of vent holes,

the controller is respectively connected with the air lifting mechanism and the first control part and is used for controlling the air lifting mechanism to be started to reduce the liquid level height in the sedimentation tank before backwashing and controlling the first control part to be started to carry out backwashing after the liquid level height is reduced. In the scheme, a gas stripping mechanism is constructed so as to enable liquid in the sedimentation tank to flow back to the upstream in a gas stripping mode, so that the problem of reducing the liquid level height in the sedimentation tank before backwashing is solved; by constructing the gas backwashing mechanism, the gas backwashing mechanism comprises a backwashing pipe arranged in the sedimentation tank, an air inlet pipe communicated with the backwashing pipe and a first control part for controlling the on/off of the air inlet pipe, when the first control part is in an open state, pressure gas can enter the backwashing pipe through the air inlet pipe and enter the sedimentation tank through an air vent of the backwashing pipe, so that sludge attached to fillers such as the bottom, the side wall, an inclined pipe (plate) and the like of the sedimentation tank is flushed by the gas, the backwashing purpose is achieved, and the problem of preventing the fillers and the sedimentation tank from being blocked is solved; the controller is constructed and is respectively connected with the air lifting mechanism and the first control part, so that the air lifting process and the backwashing process are controlled by the controller, the controller can control the air lifting mechanism to start in advance before backwashing, the liquid level in the sedimentation tank is reduced to a preset liquid level or below, and the subsequent muddy water mixed liquor in the sedimentation tank can be prevented from directly entering the next process section to influence the effluent quality after the liquid level in the sedimentation tank is lifted in the backwashing process; when the liquid level in the sedimentation tank is reduced to the set liquid level or below, the controller controls the gas backwashing mechanism to start so as to start backwashing; compared with the prior art, the design is more reasonable, and whole backwash process is controllable, not only can the self-cleaning sedimentation tank, avoid packing and sedimentation tank to take place to block up, can not influence out water quality of water moreover, also need not influence the normal operating of system because of discharging mud.

In order to solve the problem of reducing the liquid level in the sedimentation tank by using a gas stripping mode, the gas stripping mechanism further comprises a guide pipe communicated with the sedimentation tank, a gas stripping pipe communicated with the guide pipe and a second control part for controlling the on/off of the gas stripping pipe, and the controller is connected with the second control part. The controller can control the on/off of the air stripping pipe by controlling the on/off of the second control part, so that the start and the end of the air stripping process can be effectively controlled; and when the second control part is in an opening state, the pressure gas can enter the flow guide pipe through the gas stripping pipe and generate rising bubbles in the flow guide pipe, so that the rising bubbles are utilized to drive liquid in the sedimentation tank to flow back to the upstream, and the aim of reducing the liquid level height in the sedimentation tank is fulfilled.

For better realizing the effect of air stripping reflux, the flow guide pipe comprises a vertical pipe section, the vertical pipe section is communicated with the sedimentation tank, and the air stripping pipe is communicated with the vertical pipe section. The vertical rising of bubbles is facilitated, and the better air stripping reflux effect is realized.

In order to facilitate uniform distribution of water, the lower end of the flow guide pipe is further connected with a water distribution pipe, and the water distribution pipe is provided with a plurality of water distribution holes. So as to distribute water uniformly in the sedimentation tank.

Preferably, the water distribution holes are respectively arranged along the horizontal direction; and/or the water distribution pipe is horizontally arranged in the sedimentation tank.

Preferably, the first control component is a controllable valve; and/or the second control component is a controllable valve.

Preferably, the first control component adopts a solenoid valve; and/or the second control component adopts a solenoid valve.

In order to solve the problem of controlling the liquid level height in the sedimentation tank, the sedimentation tank further comprises a timing module, wherein the timing module is connected with the controller and is used for starting timing when the gas stripping mechanism is started, and when the set time length is reached, the controller controls the first control part to be started;

or the device also comprises a liquid level sensor, wherein the liquid level sensor is arranged in the sedimentation tank, is connected with the controller and is used for monitoring the liquid level height of the sedimentation tank, and when the monitored liquid level height is lower than the set threshold value, the controller controls the first control component to be started.

In order to improve the load, further, a filler is arranged in the sedimentation tank, and the lower end of the flow guide pipe is positioned below the filler.

Preferably, the controller is a single chip microcomputer, a PC (personal computer) or a PLC (programmable logic controller).

Preferably, the backwashing pipe is horizontally arranged at the bottom of the sedimentation tank.

To prevent the backwash pipe from being clogged, further, the vent holes are respectively formed at one side corresponding to the bottom of the settling tank.

In order to solve the problem of improving the air flow washing area, preferably, the included angle between each vent hole and the vertical direction is 45 degrees, and/or the vent holes are distributed in a staggered manner along the length direction of the backwashing pipe.

In order to meet the process requirement of sewage treatment, the sewage treatment device further comprises an upstream water tank, wherein the flow guide pipe is communicated with the upstream water tank and used for enabling liquid in the sedimentation tank to flow back to the upstream water tank through air stripping. After the air stripping process is finished, the muddy water mixed liquid in the upstream water tank can flow into the settling tank under the guidance of the guide pipe.

Preferably, the upstream water tank adopts an aerobic tank or a facultative tank. So as to meet the process requirement of sewage treatment.

In order to effectively control the whole backwashing process, the backwashing device further comprises a third control part for controlling the sewage delivery to the upstream water tank, and the third control part is connected with the controller. So that the controller can control whether to continue to convey sewage into the upstream water tank in the backwashing process, and the whole backwashing process can be completed more smoothly.

Preferably, the third control part is a water inlet pump, the water inlet pump is communicated with the upstream water pool through a pipeline, and the controller is connected with the water inlet pump and used for controlling the start/stop of the water inlet pump;

or, the third control part is a controllable valve arranged on a water inlet channel communicated with the upstream water tank, and the controller is connected with the controllable valve and is used for controlling the opening/closing of the controllable valve.

In order to solve the problem of providing pressure gas, the gas supply device further comprises a gas booster, the gas inlet pipe and the gas stripping pipe are respectively communicated with the gas booster, and the first control part are respectively arranged on the gas inlet pipe and the gas stripping pipe.

Preferably, the gas booster is a gas pump or a gas station.

Compared with the prior art, the mud-water separation system with the backwashing function has the advantages of compact structure, more reasonable design and controllable whole backwashing process, can automatically clean the sedimentation tank, avoid the blockage of the filler and/or the sedimentation tank, and can not influence the quality of effluent water and the normal operation of the system due to the sludge discharge, thereby effectively solving the defects in the prior art.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a mud-water separation system according to an embodiment of the present invention (a dashed line represents a signal line in the figure).

Fig. 2 is a schematic structural diagram of another mud-water separation system provided in an embodiment of the present invention, during normal water intake operation.

FIG. 3 is a schematic cross-sectional view of a backwash pipe in a mud-water separation system according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a mud-water separation system when the liquid level height is reduced according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a mud-water separation system during backwashing according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a mud-water separation system when standing still according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a mud-water separation system provided in an embodiment of the present invention after water is re-introduced.

Description of the drawings

An upstream water tank 101, a sedimentation tank 102, a packing 103, a communication hole 104, and a drain outlet 105

The draft tube 201, the vertical tube section 202, the water distribution tube 203, the air stripping tube 204 and the second control part 205

A backwash pipe 301, a vent hole 302, an intake pipe 303, and a first control member 304

Water intake pump 400, pipeline 401

Controller 500

A gas booster 600.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the present embodiment provides a sludge-water separation system with backwashing function, which includes a sedimentation tank 102 for providing a sedimentation space, a stripping mechanism, a gas backwashing mechanism and a controller 500, wherein,

the gas stripping mechanism is communicated with the sedimentation tank 102 so as to make the liquid in the sedimentation tank 102 flow back to the upstream by gas stripping, thereby reducing the liquid level in the sedimentation tank 102 before backwashing;

as shown in fig. 1, the gas backwashing mechanism comprises a backwashing pipe 301 arranged in the sedimentation tank 102, an air inlet pipe 303 communicated with the backwashing pipe 301, and a first control part 304 for controlling the on/off of the air inlet pipe 303, wherein, in the present embodiment, the backwashing pipe 301 is preferably horizontally arranged at the bottom of the sedimentation tank 102, as shown in fig. 1, the backwashing pipe 301 is configured with a plurality of vent holes 302 for allowing gas to enter the sedimentation tank 102, and in order to prevent the backwashing pipe 301 from being blocked, the vent holes 302 are generally configured at the lower surface of the backwashing pipe 301, that is, the vent holes 302 can be configured at one side corresponding to the bottom of the sedimentation tank 102, the arrangement mode of the vent holes 302 can be determined according to actual requirements, for example, the included angle between each vent hole 302 and the vertical direction can preferably be 45 degrees, as shown in fig. 3, and the vent holes 302 can be distributed in a staggered manner along the length direction of the backwashing pipe 301.

In the present embodiment, the first control component 304 may adopt a controllable valve so as to act under the control of the controller 500, and for example, the first control component 304 may preferably adopt a solenoid valve; when the first control part 304 is in an open state, the pressure gas enters the backwashing pipe 301 through the gas inlet pipe 303 and enters the sedimentation tank 102 through the vent hole 302 of the backwashing pipe 301, so that the sludge attached to the packing 103 such as the bottom, the side wall and the inclined pipe (plate) of the sedimentation tank 102 is flushed away by the gas, the purpose of backwashing is achieved, and the problem of blockage of the packing 103 and the sedimentation tank 102 can be prevented.

As shown in fig. 1, the controller 500 is connected to the stripper mechanism and the first control component 304, such that, prior to backwashing, the controller 500 may control the activation of the stripping mechanism to reduce the liquid level in the settling tank 102, when the liquid level is lowered, the controller 500 can control the first control element 304 to turn on, thereby, the backwashing of the sedimentation tank 102 is started, specifically, by constructing the controller 500, and connecting the controller 500 to the air stripping mechanism and the first control part 304, so that the controller 500 controls the gas stripping process and the backwashing process, so that the controller 500 can control the gas stripping mechanism to start in advance before backwashing, so as to reduce the liquid level height in the sedimentation tank 102 to the set liquid level height or below, and prevent subsequent liquid level discharge during backwashing, after the liquid level in the sedimentation tank 102 is lifted, the mud-water mixed liquid in the sedimentation tank 102 can directly enter the next process section to influence the effluent quality; when the liquid level in the sedimentation tank 102 is reduced to the set liquid level or below, the controller 500 controls the gas backwashing mechanism to start so as to start backwashing; compared with the prior art, the design is more reasonable, the whole backwashing process is controllable, the sedimentation tank 102 can be automatically cleaned, the blockage of the filler 103 and the sedimentation tank 102 is avoided, the effluent quality is not influenced, and the normal operation of the system is not influenced due to the discharge of sludge.

To facilitate the controller 500 to monitor the liquid level in the sedimentation tank 102, in an embodiment, the liquid level may be controlled by recording the working time of the stripping mechanism, and at this time, a timing module is further included, the timing module is connected to the controller 500 and may be integrated with the controller 500, when the stripping mechanism starts to start, the timing module starts to time, when the set time (e.g., 1 min) is reached, the liquid level in the sedimentation tank 102 may be just lowered to a desired position, and at this time, the controller 500 may control the gas backwashing mechanism to start backwashing (i.e., control the first control component 304 to start); in another embodiment, a liquid level sensor may be disposed in the sedimentation tank 102, and the liquid level sensor is connected to the controller 500 and is used for monitoring the liquid level height of the sedimentation tank 102, when the monitored liquid level height is lower than a set threshold, the liquid level height in the sedimentation tank 102 may be just lowered to a required position, and at this time, the controller 500 may also control the gas backwashing mechanism to start backwashing;

the duration of the backwashing process is determined according to actual requirements, and can be controlled by using the controller 500, for example, a timing module can be set to record the duration of the backwashing process, and the like, which is not illustrated here.

In this embodiment, the controller 500 may be an existing controller 500, preferably, the controller 500 may preferably employ a single chip, a PC, or a PLC, for example, in this embodiment, the controller 500 employs a PLC, so as to precisely control a backwashing period (for example, one backwashing for 24 h), a start time of the gas stripping mechanism, a working time of the gas backwashing mechanism, a standing time of the liquid in the sedimentation tank 102, and the like by using the PLC, thereby achieving an online automatic control.

In a more sophisticated scheme, for example, the stripping mechanism includes a flow guide pipe 201 communicated with the sedimentation tank 102, a stripper tube 204 communicated with the flow guide pipe 201, and a second control component 205 for controlling on/off of the stripper tube 204, as shown in fig. 1 or fig. 2, the controller 500 is connected to the second control component 205, so that the controller 500 can control on/off of the stripper tube 204 by controlling on/off of the second control component 205, thereby effectively controlling start and end of the stripping process; and when the second control part 205 is in an open state, the pressure gas can enter the draft tube 201 through the gas stripping pipe 204 and generate rising bubbles in the draft tube 201, so that the rising bubbles can be used for driving the liquid in the sedimentation tank 102 to flow back to the upstream, thereby achieving the purpose of reducing the liquid level in the sedimentation tank 102.

In order to increase the load, in a further scheme, the sedimentation tank 102 is usually provided with a filler 103, the filler 103 can be an inclined plate filler 103 or an inclined tube filler 103, etc. commonly used in the prior art, and the lower end of the draft tube 201 is located below the filler 103, as shown in fig. 1 or fig. 2.

In specific implementation, the draft tube 201 comprises a vertical tube section 202, as shown in fig. 1 or fig. 2, the vertical tube section 202 is communicated with the sedimentation tank 102, and the gas stripping tube 204 is communicated with the vertical tube section 202, so that bubbles can rise vertically, and a better gas stripping reflux effect can be realized; the second control component 205 may employ a controllable valve to act under the control of the controller 500, e.g., the second control component 205 may preferably employ a solenoid valve; it will be appreciated that where packing 103 is provided, the lower end of the vertical tube section 202 should be located below the packing 103, as shown in fig. 1 or 2.

In order to facilitate uniform distribution of water, in a further scheme, the lower end of the draft tube 201 is further connected with a water distribution pipe 203, as shown in fig. 1 or fig. 2, the water distribution pipe 203 is configured with a plurality of water distribution holes so as to distribute water uniformly in the sedimentation tank 102; for example, the water distribution pipes 203 are preferably horizontally disposed in the sedimentation tank 102, and the water distribution holes may be respectively disposed along a horizontal direction, i.e., the central axes of the water distribution holes are all in a horizontal plane, so as to distribute water horizontally.

In order to provide the pressurized gas for the system, in a further embodiment, the system further includes a gas booster 600, the gas inlet pipe 303 and the gas stripping pipe 204 may be respectively communicated with the gas booster 600, the first control component 304 and the first control component 304 are respectively installed on the gas inlet pipe 303 and the gas stripping pipe 204, as shown in fig. 1 or fig. 2, and the gas booster 600 may be a gas pump or a gas station, etc. to continuously generate the pressurized gas.

In order to meet the process requirement of sewage treatment, in a more complete scheme, the system further comprises an upstream water tank 101, wherein the guide pipe 201 is communicated with the upstream water tank 101 and is used for enabling liquid in the sedimentation tank 102 to flow back to the upstream water tank 101 through air stripping, and after the air stripping process is finished, muddy water mixed liquid in the upstream water tank 101 can flow into the sedimentation tank 102 under the guidance of the guide pipe 201; in specific implementation, the upstream water tank 101 may preferentially adopt an aerobic tank or a facultative tank, so as to meet the process requirements of sewage treatment; as shown in fig. 1 or 2, the upstream water tank 101 may be integrally connected to the sedimentation tank 102, a communication hole 104 for communicating the upstream water tank 101 is formed in a side wall of the sedimentation tank 102, an upper end of the draft tube 201 may be installed at the communication hole 104, and a drain outlet 105 or an overflow outlet for discharging the supernatant is formed in a side wall of the sedimentation tank 102, as shown in fig. 1 or 2.

In order to facilitate the controller 500 to control the whole backwashing process more effectively, in a more complete scheme, the system further comprises a third control unit for controlling whether to convey sewage into the upstream water tank 101, wherein the third control unit is connected with the controller 500, so that the controller 500 can control whether to convey sewage into the upstream water tank 101 continuously in the backwashing process, and the whole backwashing process can be completed more smoothly; in one embodiment, the third control component may be a water inlet pump 400, as shown in fig. 2, the water inlet pump 400 may be in communication with the upstream water tank 101 through a pipe 401, and the controller 500 is connected to the water inlet pump 400 to control the on/off of the water inlet pump 400.

Of course, in another preferred embodiment, the third control unit may be a controllable valve which is disposed on the water inlet channel communicated with the upstream water tank 101, and the controller 500 is connected to the controllable valve to control the opening/closing of the controllable valve, and the controllable valve may be, for example, a solenoid valve.

The system works in backwashing as follows:

when the system normally operates in water inlet and outlet, muddy water mixed liquor in the upstream water tank 101 uniformly enters the sedimentation tank 102 through the guide pipe 201 and the water distribution pipe 203, muddy water is separated after passing through the filler 103, sludge sinks to the bottom, and purified water is discharged from the water outlet 105;

when the set backwashing time is reached, the controller 500 controls the water inlet pump 400 to stop and starts the second control part 205, so that the liquid in the sedimentation tank 102 flows back to the upstream water tank 101, the liquid level in the sedimentation tank 102 begins to fall, and the liquid level in the upstream water tank 101 rises; when the set time is reached (for example, about 1 min), the controller 500 starts the first control part 304 to start backwashing, so that sludge attached to the packing 103, such as the bottom of the sedimentation tank 102, the wall of the mud bucket, the inclined pipe (plate) and the like, is washed by gas and falls off; when the backwashing time reaches the set time, the controller 500 closes the first control part 304 and the second control part 205, the liquid in the upstream water tank 101 starts to flow into the sedimentation tank 102, and the standing starts; when the set standing time is reached, the supernatant is clarified, at this time, the controller 500 controls the water inlet pump 400 to be started so as to continuously feed water, so that the whole system can normally operate, and at this time, the backwashing process is ended; when the next set backwashing time is reached, the steps are repeatedly executed, so that the automatic online backwashing function can be realized.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.

Claims

1. A mud-water separation system with backwashing function comprises a sedimentation tank for providing a sedimentation space, and is characterized by also comprising a gas stripping mechanism, a gas backwashing mechanism and a controller, wherein,

the air stripping mechanism is communicated with the sedimentation tank,

the controller is respectively connected with the air lifting mechanism and the first control part and is used for controlling the air lifting mechanism to be started to reduce the liquid level height in the sedimentation tank before backwashing and controlling the first control part to be started to carry out backwashing after the liquid level height is reduced.

2. The backwashing water-sludge separating system of claim 1 wherein the air-stripping mechanism comprises a draft tube in communication with the sedimentation tank, an air-stripping tube in communication with the draft tube, and a second control unit for controlling on/off of the air-stripping tube, the controller being connected to the second control unit.

3. The backwash-capable sludge-water separation system according to claim 2, wherein the draft tube comprises a vertical tube section, the vertical tube section is communicated with the sedimentation tank, and the stripper tube is communicated with the vertical tube section;

and/or, the first control component is a controllable valve;

and/or the second control component is a controllable valve;

and/or the controller is a single chip microcomputer, a PC (personal computer) or a PLC (programmable logic controller).

4. The backwashing water-mud separating system of claim 3, wherein the lower end of the draft tube is further connected with a water distribution pipe, and the water distribution pipe is provided with a plurality of water distribution holes;

and/or a filler is also arranged in the sedimentation tank, and the lower end of the flow guide pipe is positioned below the filler.

5. The backwashing water-mud separating system of claim 4, wherein the water distribution holes are respectively arranged in a horizontal direction;

and/or the water distribution pipe is horizontally arranged in the sedimentation tank;

and/or the first control component adopts an electromagnetic valve;

and/or the second control component adopts a solenoid valve.

6. A backwash function sludge-water separation system as defined in any one of claims 1 to 5 wherein the air holes are formed on the respective sides corresponding to the bottom of the sedimentation tank;

and/or the included angle between each vent hole and the vertical direction is 45 degrees;

and/or the vent holes are distributed in a staggered way along the length direction of the backwashing pipe.

7. A sludge-water separation system with a backwashing function according to any one of claims 1 to 5, further comprising a timing module, wherein the timing module is connected with the controller, the timing module is used for starting timing when the air stripping mechanism is started, and when the set time length is reached, the controller controls the first control part to be started;

8. A backwash sludge-water separation system according to any one of claims 1 to 5 further comprising an upstream water basin, wherein the draft tube is in communication with the upstream water basin for flowing liquid in the sedimentation tank back to the upstream water basin by gas stripping;

and/or the gas booster is further included, the gas inlet pipe and the gas stripping pipe are respectively communicated with the gas booster, and the first control part are respectively arranged on the gas inlet pipe and the gas stripping pipe.

9. A backwash-function sludge-water separation system as defined in claim 8, wherein the upstream water tank is an aerobic tank or a facultative tank;

and/or the gas supercharger is a gas pump or a gas station;

and/or the sewage treatment system further comprises a third control component for controlling the sewage to be delivered to the upstream water pool, and the third control component is connected with the controller.

10. The backwashing water mud and water separating system of claim 9 wherein the third control component is a water inlet pump which is in communication with the upstream basin through a pipe, and the controller is connected to the water inlet pump for controlling the on/off of the water inlet pump;