A sludge backwash system

Abstract

The present invention provides a sludge backwashing system for flushing a sludge pipe, comprising a flushing component, a sensor, and a controller. The flushing component comprises a flushing three-way valve, a first port of the flushing three-way valve being connected to a flushing tank, a second port of the flushing three-way valve being connected to a first flushing pipe, a bottom end of the first flushing pipe being connected to a starting end of the sludge pipe, a third port of the flushing three-way valve being connected to a second flushing pipe, a third flushing pipe being vertically arranged at the bottom end of the second flushing pipe, a plurality of first water outlets being arranged at the bottom of the third flushing pipe, and the plurality of first water outlets being connected to an upper wall of the sludge pipe, a sensor being arranged in the sludge pipe for detecting a sludge state in the sludge pipe, a controller being arranged on the flushing three-way valve and electrically connected to the sensor, and the controller being used to receive a sludge state signal detected by the sensor, and to control the switch state of the three ports of the flushing three-way valve according to the sludge state signal.

Description

Technical Field

[0001] The invention relates to the field of sludge treatment, and in particular to a sludge backwashing system. Background Art

[0002] Sewage and wastewater are unavoidable in people's daily lives. Discharging untreated sewage and wastewater directly into natural water bodies can cause eutrophication, excessive levels of heavy metals, and other pollution. Therefore, sewage and wastewater generally need to be treated before being discharged into natural water bodies.

[0003] Biological sewage treatment primarily utilizes the metabolism of microorganisms to remove pollutants from water and is often preferred due to its low cost and high effectiveness. Currently used biological sewage treatment methods mainly include the A / O process and the oxidation ditch process. Sludge tanks are an important component of sewage treatment and are generally used to precipitate impurities. After the liquid in the upper layer of the sludge tank is extracted, the sludge at the bottom of the sludge tank needs to be extracted using a sludge pipeline before being processed. Sludge pipelines are only used when extracting sludge. Horizontal sections of sludge pipelines are prone to sedimentation and clogging, making subsequent inspection and dredging of the pipelines complex, time-consuming, and labor-intensive.

[0004] At present, the commonly used method for flushing sludge pipes is mainly to connect a water pipe at one end of the sludge pipe to flush the inside of the pipe to clean the sludge inside the sludge pipe. However, when the sludge in the sludge pipe is relatively full or the water content in the sludge is relatively low, the conventional flushing method takes a long time to flush, the flushing effect is poor and it is easy to cause a waste of water resources. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a sludge backwashing system to solve the problem in the prior art that when the sludge in the sludge pipe is relatively full or the sludge contains relatively little water, the conventional flushing method takes a long time, has poor flushing effect and easily causes waste of water resources.

[0006] The present invention provides a sludge backwashing system for flushing a sludge pipe, comprising a flushing component, a sensor, and a controller. The flushing component comprises a flushing three-way valve, a first port of the flushing three-way valve being connected to a flushing tank, a second port of the flushing three-way valve being connected to a first flushing pipe, a bottom end of the first flushing pipe being connected to a starting end of the sludge pipe, a third port of the flushing three-way valve being connected to a second flushing pipe, a third flushing pipe being vertically provided at the bottom end of the second flushing pipe, a plurality of first water outlets being provided at the bottom of the third flushing pipe, and the plurality of first water outlets being connected to an upper wall of the sludge pipe, the sensor being provided in the sludge pipe for detecting the sludge state in the sludge pipe, the controller being provided on the flushing three-way valve and electrically connected to the sensor, the controller being used to receive a sludge state signal detected by the sensor, and to control the switch state of the three ports of the flushing three-way valve according to the sludge state signal.

[0007] The beneficial effects of the present invention are as follows: the present invention provides a sludge backwashing system for flushing a sludge pipe, comprising a flushing component, a sensor, and a controller, wherein the flushing component comprises a flushing three-way valve, a first port of the flushing three-way valve is connected to a flushing tank, a second port of the flushing three-way valve is connected to a first flushing pipe, a port of the first flushing pipe is connected to the starting end of the sludge pipe, a third port of the flushing three-way valve is connected to the second flushing pipe, a third flushing pipe is vertically arranged at the bottom end of the second flushing pipe, a plurality of first water outlets are arranged at the bottom of the third flushing pipe, the water outlet pressure of the plurality of first water outlets is greater than the water outlet pressure of the first flushing pipe; the plurality of first water outlets are connected to the upper wall of the sludge pipe, a sensor is arranged in the sludge pipe for detecting the sludge state in the sludge pipe, a controller is arranged on the flushing three-way valve and electrically connected to the sensor, the controller is used to receive a sludge state signal detected by the sensor, and control the switch state of the three ports of the flushing three-way valve according to the sludge state signal. The sludge backwashing system proposed in the present invention is provided with a first flushing pipe, a second flushing pipe and a third flushing pipe, a sensor is provided in the sludge pipe, and a controller is provided on the flushing three-way valve. The sensor is electrically connected to the controller, and the sludge state in the sludge pipe is detected by the sensor. The controller receives the sludge state signal detected by the sensor and controls the switch state of the three ports of the flushing three-way valve according to the sludge state signal in the sludge pipe, so as to adjust the working state of each flushing pipe to flush the sludge pipe and improve the flushing effect of the sludge pipe.

[0008] Preferably, the water outlet cross-sectional areas of the plurality of first water outlets are adjustable.

[0009] Preferably, the flushing assembly includes a baffle, which is provided with a plurality of second water outlets, and the plurality of second water outlets are adapted to the plurality of first water outlets. A slot is provided on the third flushing pipe, and the width of the slot is adapted to the thickness of the baffle. When the baffle slides in the slot, the axes of the first water outlet and the second water outlet coincide or stagger to adjust the water outlet cross-sectional area of ​​the first water outlet.

[0010] Preferably, an elastic sealing ring is provided on the card slot, and the elastic sealing ring is used to seal the gap between the card slot and the baffle.

[0011] Preferably, a guide rail is provided on the inner wall of the third flushing pipe, and the guide rail extends to the slot, and the width of the guide rail is adapted to the thickness of the baffle.

[0012] Preferably, the first water outlet and the second water outlet are arranged at an angle.

[0013] Preferably, the outlet end of the sludge pipe is connected to a sludge three-way valve, the second port of the sludge three-way valve is connected to the sludge collection tank, and the third port of the sludge three-way valve is connected to the sewage collection tank.

[0014] Preferably, the flushing three-way valve and the sludge three-way valve are both electric valves.

[0015] Preferably, the sensor is a distance sensor, which is arranged at the top end of the inner wall of the sludge pipe, and is used to detect the filling degree of sludge in the sludge pipe.

[0016] Preferably, the sensor is a water content sensor, which is arranged at the bottom end of the inner wall of the sludge pipe and is used to detect the water content of the sludge in the sludge pipe.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of a first embodiment of a sludge backwashing system provided by the present invention;

[0019] Figure 2 This is a partially enlarged structural diagram of point A in the first embodiment of the sludge backwashing system provided by the present invention;

[0020] Figure 3 This is a partially enlarged structural diagram of point B in the first embodiment of the sludge backwashing system provided by the present invention;

[0021] Figure 4This is a partially enlarged structural diagram of point C of the first embodiment of the sludge backwashing system provided by the present invention;

[0022] Figure 5 This is a partially enlarged structural diagram of point D of the first embodiment of the sludge backwashing system provided by the present invention;

[0023] Figure 6 A schematic cross-sectional view of the third flushing pipe of the first embodiment of the sludge backwashing system provided by the present invention;

[0024] Figure 7 A schematic structural diagram of a baffle in a first embodiment of a sludge backwashing system provided by the present invention;

[0025] Figure 8 A schematic structural diagram of the coordination of the third flushing pipe and the baffle of the first embodiment of the sludge backwashing system provided by the present invention;

[0026] Figure 9 A schematic cross-sectional view of the third flushing pipe and the baffle in the first embodiment of the sludge backwashing system provided by the present invention;

[0027] Figure 10 A schematic structural diagram of a second embodiment of a sludge backwashing system provided by the present invention;

[0028] Figure 11 This is a schematic diagram of the partially enlarged structure of point E of the second embodiment of the sludge backwashing system provided by the present invention.

[0029] Description of main component symbols:

[0030] Flushing three-way valve 11 Flush the first port of the three-way valve 111 Flush the second port of the three-way valve 112 Flush the third port of the three-way valve 113 flushing pool 12 First flushing pipe 13 Second flushing pipe 14 The third flushing pipe 15 First water outlet 151 card slot 152 guide 153 bezel 16 Second water outlet 161 flushing pump 17 sludge pipe 21 sludge pool 22 Check valve 23 sludge pump 24 Sludge three-way valve 25 Sludge three-way valve first port 251 Sludge three-way valve second port 252 Sludge three-way valve third port 253 Sludge collection tank 26 sewage collection tank 27 distance sensor 31 Moisture content sensor 32 Controller 40

[0031] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] Specifically, such as Figures 1 to 9 As shown, in the embodiment of the present invention, the sludge backwashing system includes a flushing component, a sensor, and a controller 40. The flushing component includes a flushing three-way valve 11. The three ports of the flushing three-way valve 11 can be switched by separate valves. The first port 111 of the flushing three-way valve is connected to the flushing tank 12. The flushing tank 12 stores water required for flushing the pipeline. The second port 112 of the flushing three-way valve is connected to the first flushing pipe 13. Preferably, the first flushing pipe 13 is vertically arranged with the sludge pipe 21, and the bottom end of the first flushing pipe 13 is connected to the sludge pipe 21. The starting end is connected, and the water from the flushing tank 12 can flush the sludge deposited in the sludge pipe 21 after passing through the first flushing pipe 13. The third port 113 of the flushing three-way valve is connected to the second flushing pipe 14. A third flushing pipe 15 is vertically provided at the bottom end of the second flushing pipe 14. A plurality of first water outlets 151 are provided at the bottom of the third flushing pipe 15. Preferably, when the first flushing pipe 13 and the third flushing pipe 15 are used separately, the water outlet pressure of the first water outlet 151 is greater than the water outlet pressure of the first flushing pipe 13, and the first water outlet 151 is connected to the upper wall of the sludge pipe 21. The sensor is provided in the sludge pipe 21 for detecting the sludge state in the sludge pipe 21. The controller 40 is provided on the flushing three-way valve 11 and is electrically connected to the sensor. The controller 40 is used to receive the sludge state signal detected by the sensor and control the switch state of the three ports of the flushing three-way valve 11 according to the sludge state signal. By setting the sensor and the controller 40, the switch state of the three ports of the flushing three-way valve 11 is controlled, and then the working state of the first flushing pipe 13, the second flushing pipe 14 and the third flushing pipe 15 is controlled. When the first port 11 of the flushing three-way valve is opened, the second flushing pipe 14 and the third flushing pipe 15 are opened. When the first port 111 and the second port 112 of the flushing three-way valve are opened at the same time, the first flushing pipe 13 flushes the sludge pipe 21 alone. When the first port 111 and the third port 113 of the flushing three-way valve are opened at the same time, the third flushing pipe 15 flushes the sludge pipe 21 alone. When the first port 111, the second port 112 and the third port 113 of the flushing three-way valve are opened at the same time, the first flushing pipe 13 and the third flushing pipe 15 are used in conjunction to effectively flush the sludge in the sludge pipe 21 and improve the flushing effect.

[0036] In this embodiment, the water outlet cross-sectional area of ​​the first water outlets 151 is adjustable. It can be understood that when the water flow in the third flushing pipe 15 is constant, the smaller the water outlet cross-sectional area of ​​the first water outlet 151, the greater the pressure of the water outlet, and the greater the water outlet pressure, the better the sludge flushing effect in the sludge pipe 21. In particular, when the sludge pipe 21 is filled with a lot of sludge or the sludge water content is relatively low, a greater water outlet pressure is often required for flushing. The present invention sets the water outlet cross-sectional area of ​​the first water outlet 151 to be adjustable, and the water outlet pressure of the first water outlet 151 can be adjusted to flush different sludge states and improve the flushing effect.

[0037] like Figures 6 to 9 As shown, the flushing assembly also includes a baffle 16, which is provided with a plurality of second water outlets 161, and the second water outlets 161 are adapted to the first water outlet 151. A slot 152 is provided at the bottom end of the third flushing pipe 15, wherein the width of the slot 152 is adapted to the thickness of the baffle 16, so that the baffle 16 can slide in the slot 152. The baffle 16 slides in the slot 152. When the axis of the first water outlet 151 coincides with the axis of the second water outlet 161, the water outlet cross-sectional area of ​​the first water outlet 151 is the largest. Preferably, a sealing ring (not shown in the figure) is provided on the slot 152, and the sealing ring is used to seal the gap between the opening of the slot 152 and the baffle 16 to prevent liquid leakage. Preferably, guide rails 153 are provided on both inner walls of the third flushing pipe 15. The guide rails 153 extend to the slot 152. The width of the guide rails 153 matches the thickness of the baffle 16. The baffle 16 can slide within the guide rails 153, thereby improving the stability of the baffle 16 sliding within the slot 152. As the baffle 16 slides within the guide rails 153, when the axes of the first water outlet 151 and the second water outlet 161 are offset and gradually move away from each other, the water outlet cross-sectional area of ​​the first water outlet 151 gradually decreases, and the water outlet pressure of the first water outlet 151 gradually increases until the first water outlet 151 is completely closed. By sliding the baffle 16 within the guide rails 153, the water outlet cross-sectional area of ​​the first water outlet 151, and thus the water outlet pressure of the first water outlet 151, is adjusted to flush sludge in different states.

[0038] In this embodiment, if Figure 3 As shown, the first water outlet 151 can be tilted, and similarly, the second water outlet 161 can also be tilted. Preferably, the angle between the first water outlet 151 and the horizontal plane can be set to 65-80 degrees. The tilted setting of the first water outlet 151 can effectively disperse the sludge blocks and improve the flushing efficiency of the system. Preferably, in this embodiment, as shown Figure 1 As shown, a flushing pump 17 can be provided at the water outlet of the flushing tank 12 to provide pressure to the water.

[0039] In this embodiment, if Figure 1As shown, the starting end of the sludge pipe 21 can be connected to the sludge pool 22 through a check valve 23, and a sludge pump 24 is set at the mud outlet of the sludge pool 22. Preferably, the check valve 23 can be a one-way valve to prevent sewage from flowing back into the sludge pool 22 during the flushing process. Figure 1 and Figure 4 As shown, a sludge three-way valve 25 is also provided at the tail end of the sludge pump 24. The first port 251 of the sludge three-way valve is connected to the sludge pipe 21, the second port 252 of the sludge three-way valve is connected to the sludge collection tank 26, and the third port 253 of the sludge three-way valve is connected to the sewage collection tank 27. Each of the three ports of the sludge three-way valve 25 is equipped with an independent valve. When extracting sludge, the valves of the first port 251 and the second port 252 of the sludge three-way valve can be opened simultaneously to extract sludge from the sludge tank 22 into the sludge collection tank 26. When flushing the sludge pipe 21, the valves of the first port 251 and the third port 253 of the sludge three-way valve can be opened simultaneously to collect sewage generated by cleaning the sludge pipe 21 into the sewage collection tank 27 and then be processed to prevent pollution. Preferably, in this embodiment, the flushing three-way valve 11, the check valve 23, and the sludge three-way valve 25 are all electric valves.

[0040] In this embodiment, if Figure 1 and Figure 5As shown, the sensor may be a distance sensor 31, which is provided at the top of the inner wall of the sludge pipe 21. The distance sensor 31 is used to detect the filling degree of the sludge in the sludge pipe 21. It can be understood that the less the sludge in the sludge pipe 21 is filled, the easier it is to flush. Preferably, a first distance threshold and a second distance threshold are preset in the distance sensor 31, wherein the first distance threshold is greater than the second distance threshold. When in use, when the distance sensor 31 detects that the distance from the distance sensor 31 to the top of the sludge in the sludge pipe 21 is greater than the first distance threshold, it indicates that the sludge in the sludge pipe 21 is not much at this time, and this When the distance sensor 31 sends the detection signal to the controller 40, the controller 40 receives the detection signal and controls the first port 111 and the second port 112 of the flushing three-way valve to open and the third port 113 of the flushing three-way valve to close according to the detection signal, and water enters the sludge pipe 21 through the first flushing pipe 13 to flush the sludge pipe 21; when the distance sensor 31 detects that the distance from the distance sensor 31 to the top of the sludge in the sludge pipe 21 is less than the first distance threshold and greater than the second distance threshold, the sludge pipe 21 is filled with more sludge, and the controller 40 controls the three ports of the flushing three-way valve 11 to close. The ports are opened at the same time, and water enters the first flushing pipe 13 and the third flushing pipe 15 at the same time, flushing the sludge in the sludge pipe 21 in multiple directions. When the distance sensor 31 detects that the distance from the distance sensor 31 to the top of the sludge in the sludge pipe 21 is less than the second distance threshold, the sludge pipe 21 is filled with a lot of sludge. At this time, the controller 40 first controls the first port 111 and the third port 113 of the flushing three-way valve to open, and the second port 112 of the flushing three-way valve to close, and water enters the sludge pipe 21 through the third flushing pipe 15. At this time, there is no water supply in the first flushing pipe 13, and only water is supplied to the third flushing pipe 15. Therefore, The water outlet pressure of the first water outlet 151 is very high, which can effectively dilute and pre-treat the sludge filled in the sludge pipe 21. After a period of time, the controller 40 controls the first port 111 and the second port 112 of the flushing three-way valve to open, and the third port 113 of the flushing three-way valve to close. Water enters the sludge pipe 21 through the first flushing pipe 13 to flush the diluted sludge in the sludge pipe 21. The distance sensor 31 and the controller 40 cooperate to control the switching status of the three ports of the flushing three-way valve 11, so that sludge with different filling degrees in the sludge pipe 21 can be flushed to improve the flushing effect.

[0041] The second embodiment of the present invention also provides a sludge backwashing system. The sludge backwashing system provided in this embodiment differs from the sludge backwashing system provided in the first embodiment in that:

[0042] like Figure 10 and Figure 11As shown, the sensor can be a water content sensor 32, which is arranged at the bottom end of the inner wall of the sludge pipe 21 and is used to detect the water content of the sludge in the sludge pipe 21. It can be understood that the higher the water content of the sludge, the softer the sludge and the easier it is to flush, and the lower the water content of the sludge, the harder the sludge and the more difficult it is to flush; similarly, the water content sensor 32 is preset with a first water content threshold and a second water content threshold, wherein the first water content threshold is greater than the second water content threshold. When in use, when the water content sensor 32 detects that the water content of the sludge in the sludge pipe 21 is greater than the first water content threshold, the sludge is The water content of the sludge is high, and the sludge is soft and easy to flush. At this time, the water content sensor 32 sends the detection signal to the controller 40. After detecting the signal, the controller 40 controls the first port 111 and the second port 112 of the flushing three-way valve to open, and the third port 113 of the flushing three-way valve to close. Water enters the sludge pipe 21 through the first flushing pipe 13 to flush the sludge pipe 21. Similarly, when the water content sensor 32 detects that the water content in the sludge is less than the first water content threshold and greater than the second water content threshold, and when the water content sensor 32 detects that the water content in the sludge is less than the second water content threshold. The controller 40 receives the detection signal of the water content sensor 32 and controls the switch state of the three ports of the flushing three-way valve 11, which is similar to the previous embodiment and will not be repeated here. By cooperating with the water content sensor 32 and the controller 40 to control the switch state of the three ports of the flushing three-way valve 11, sludge with different water contents in the sludge pipe 21 can be flushed to improve the flushing effect.

[0043] In summary, the sludge backwashing system disclosed in the present invention is provided with a first flushing pipe 13, a second flushing pipe 14 and a third flushing pipe 15, a sensor is provided in the sludge pipe 21, the sensor can be a distance sensor 31 or a water content sensor 32, a controller 40 is provided on the flushing three-way valve 11, the sensor is electrically connected to the controller 40, the sludge filling degree in the sludge pipe is detected by the distance sensor 31, the controller receives the sludge filling degree signal detected by the distance sensor 31, and controls the switch state of the three ports of the flushing three-way valve 11 according to the sludge filling degree signal, so as to adjust the working state of each flushing pipe to flush the sludge pipe, thereby improving the flushing effect of the sludge pipe, and The water content sensor 32 detects the water content of the sludge in the sludge pipe 21, and the controller 40 receives the sludge water content signal detected by the water content sensor 32, and controls the switch status of the three ports of the flushing three-way valve according to the sludge water content signal, so as to adjust the working status of each flushing pipe to flush the sludge pipe and improve the flushing effect of the sludge pipe. By setting the cross-sectional area of ​​the first water outlet 151 of the third flushing pipe 15 to be adjustable, the water outlet pressure of the first water outlet 151 can be adjusted to improve the flushing effect of the sludge pipe. Furthermore, a sewage collection tank 27 can be set at the tail end of the sludge pipe 21, and the sewage generated by flushing the sludge pipe 21 can be collected through the sewage collection tank 27 to prevent pollution.

[0044] It should be noted that the above implementation process is only to illustrate the feasibility of this application, but this does not mean that the sludge backwash system of this application has only the above-mentioned implementation process. On the contrary, as long as the sludge backwash system of this application can be implemented, it can be included in the feasible implementation plan of this application.

[0045] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0046] The above embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A sludge backwashing system for flushing a sludge pipe, characterized in that: The flushing device comprises a flushing component, a sensor, and a controller, wherein the flushing component comprises a flushing three-way valve, a first port of the flushing three-way valve is connected to a flushing tank, a second port of the flushing three-way valve is connected to a first flushing pipe, a bottom end of the first flushing pipe is connected to a starting end of the sludge pipe, a third port of the flushing three-way valve is connected to a second flushing pipe, a third flushing pipe is vertically provided at the bottom end of the second flushing pipe, a plurality of first water outlets are provided at the bottom of the third flushing pipe, and the plurality of first water outlets are connected to an upper wall of the sludge pipe, the sensor is provided in the sludge pipe for detecting a sludge state in the sludge pipe, the controller is provided on the flushing three-way valve and is electrically connected to the sensor, the controller is used to receive a sludge state signal detected by the sensor, and control the switch state of the three ports of the flushing three-way valve according to the sludge state signal; The water outlet cross-sectional areas of the first water outlets are adjustable; The flushing assembly includes a baffle, which is provided with a plurality of second water outlets, which are adapted to the plurality of first water outlets. The third flushing pipe is provided with a slot, the width of which is adapted to the thickness of the baffle. When the baffle slides in the slot, the axes of the first water outlet and the second water outlet coincide with or are staggered, so as to adjust the water outlet cross-sectional area of ​​the first water outlet. The sensor is a water content sensor, which is arranged at the bottom end of the inner wall of the sludge pipe. The water content sensor is used to detect the water content of the sludge in the sludge pipe. The water content is inversely proportional to the flushing force.

2. The sludge backwashing system according to claim 1, characterized in that: An elastic sealing ring is provided on the card slot, and the elastic sealing ring is used to seal the gap between the card slot and the baffle.

3. The sludge backwashing system according to claim 2, characterized in that: A guide rail is provided on the inner wall of the third flushing pipe. The guide rail extends to the clamping groove. The width of the guide rail is adapted to the thickness of the baffle.

4. The sludge backwashing system according to claim 3, characterized in that: The first water outlet and the second water outlet are arranged obliquely.

5. The sludge backwashing system according to claim 1, characterized in that: The outlet end of the sludge pipe is connected to a sludge three-way valve, the second port of the sludge three-way valve is communicated with a sludge collection tank, and the third port of the sludge three-way valve is communicated with a sewage collection tank.

6. The sludge backwashing system according to claim 5, characterized in that: The flushing three-way valve and the sludge three-way valve are both electric valves.

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