Self-cleaning solid-liquid separation equipment

Abstract

The utility model relates to self-cleaning solid-liquid separation equipment. The self-cleaning solid-liquid separation equipment comprises a main body which is constructed into a tank body structure with a hollow cavity, and a silt collecting structure is arranged at the lower part in the main body; the silt collecting structure is constructed into a funnel structure, the edge of an upper opening of a funnel body of the funnel structure is arranged to be connected with the side wall of the main body, a funnel nozzle is arranged at the bottom of the funnel body of the funnel structure, and the funnel nozzle is arranged to be communicated with an inlet of the solid-liquid separator through a pipeline; and the outlet of the solid-liquid separator is communicated with a first reflux inlet above the silt collecting structure through a pipeline. The self-cleaning solid-liquid separation equipment provided by the utility model can effectively collect solid scale and realize solid-liquid separation, so that the equipment realizes circulating self-cleaning and is convenient to maintain and repair.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, in particular to a self-cleaning solid-liquid separation device. BACKGROUND

[0002] Generally, in the field of water treatment, when an anaerobic reactor is used to treat water containing high solid content or high fouling ions (such as calcium ions or phosphate ions), solid water scale such as calcium carbonate, calcium phosphate or magnesium ammonium phosphate is likely to form on the inner wall of the reactor, the pipeline and the bottom, and inside the anaerobic microorganisms, after a long period of operation. These water scales can cause problems such as sedimentation, blockage or collapse of the water distribution system at the bottom, and then the formation of dead zones at the bottom of the reactor. The effluent pipe is prone to fouling and blockage due to the release of carbon dioxide and the increase in alkalinity, which can cause poor water discharge or the risk of tank rupture. The accumulation of solid water scale inside the three-phase separator can cause the three-phase separator to be blocked and fail. Fouling inside the anaerobic sludge can cause the inorganicization of the anaerobic sludge, resulting in a decrease or failure of the treatment capacity of the anaerobic reactor. These inorganic sludge can further break down and be lost, causing the amount of sludge in the reactor to continuously decrease. The cost of supplementing the lost anaerobic sludge is huge. Fouling can cause the treatment capacity of the anaerobic reactor to decrease, and the reactor to be blocked, which requires cost to clean the reactor. The reactor needs to be shut down for maintenance during the maintenance process, which cannot be used, affecting the overall treatment capacity of the plant.

[0003] Therefore, the prior art still needs to be improved and improved.

[0004] It should be noted that the above introduction to the technical background is only to facilitate a clear and complete description of the technical solutions of the present application, and to facilitate the understanding of those skilled in the art. The above technical solutions cannot be considered as known to those skilled in the art merely because they are described in the background section of the present application. CONTENT OF THE INVENTION

[0005] In order to solve one or more of the above technical problems, the present application provides a self-cleaning solid-liquid separation device, which can effectively collect solid water scale, realize solid-liquid separation and recycle effective sludge, so that the device realizes cyclic self-cleaning and is convenient to maintain and overhaul.

[0006] In a first aspect of the present disclosure, a self-cleaning solid-liquid separation device is provided, which comprises: a main body configured as a tank structure having a hollow chamber, a sludge collection structure arranged at a lower portion inside the main body; the sludge collection structure is configured as a funnel structure, an upper opening edge of a funnel body of the funnel structure is arranged to be connected with a side wall of the main body, a bottom of the funnel body of the funnel structure is provided with a funnel nozzle, the funnel nozzle is arranged to be communicated with an inlet of a solid-liquid separator through a pipeline, and an outlet of the solid-liquid separator is arranged to be communicated with a first backflow port above the sludge collection structure through a pipeline.

[0007] Further, in some embodiments, an upper surface of the funnel body of the funnel structure towards a side of a top of the main body is provided with a liquid outlet, and the liquid outlet is arranged to be directed towards a circumferential direction of the funnel body.

[0008] Further, in some embodiments, along a radial direction of the funnel body, the upper surface of the funnel body is arranged with a plurality of liquid outlets arranged in a line, and the plurality of liquid outlets are arranged to be directed towards a same clockwise circumferential direction or a counterclockwise circumferential direction of the funnel body.

[0009] Further, in some embodiments, along a circumferential direction of the funnel body, the upper surface of the funnel body is arranged with a plurality of liquid outlets arranged in a line, and the plurality of liquid outlets are arranged to be directed towards a same clockwise circumferential direction or a counterclockwise circumferential direction of the funnel body.

[0010] Further, in some embodiments, a lower surface of the funnel body of the funnel structure towards a side of a bottom of the main body is arranged with a liquid storage cavity between the lower surface and an inner wall of the main body.

[0011] Further, in some embodiments, a liquid distribution pipe is arranged in the liquid storage cavity, and the liquid distribution pipe is arranged to be communicated with the liquid inlet and a first treatment liquid outlet through a pipeline.

[0012] Further, in some embodiments, a first liquid concentration sensing device is arranged on a side wall of the main body above the funnel structure, and the first backflow port is arranged to be higher than the first liquid concentration sensing device.

[0013] Further, in some embodiments, a second liquid concentration sensing device is arranged on a side wall of the main body above the funnel structure, and the second liquid concentration sensing device is arranged to be higher than the first backflow port.

[0014] Further, in some embodiments, a plurality of third liquid concentration sensing devices are arranged on a side wall of the main body above the funnel structure from bottom to top.

[0015] Further, in some embodiments, the main body is provided with an overflow port on the sidewall above the funnel structure, and the overflow port is arranged higher than the second liquid concentration sensing device.

[0016] Further, in some embodiments, the main body is provided with a second treatment liquid outlet on the sidewall above the funnel structure, and the second treatment liquid outlet is arranged in communication with the first separation unit through a pipeline; the first separation unit is arranged in communication with the second backflow port through a pipeline; and the second backflow port is arranged inside the main body higher than the first liquid concentration sensing device but lower than the second treatment liquid outlet.

[0017] Further, in some embodiments, the main body is further provided with a second separation unit, and the second separation unit is arranged in communication with the first separation unit through a pipeline via the second treatment liquid outlet.

[0018] Further, in some embodiments, a solid-liquid separation pump is arranged between the funnel nozzle and the inlet of the solid-liquid separator, and the solid-liquid separator is further provided with a heavy residue outlet.

[0019] Further, in some embodiments, the main body is provided with a third separation unit above the funnel structure, and the inlet of the third separation unit is arranged lower than the second liquid concentration sensing device, and the outlet of the third separation unit is arranged in communication with the liquid inlet at the bottom of the main body through a pipeline.

[0020] According to the above and the following some embodiments, the beneficial effects of the present disclosure are that:

[0021] By arranging the main body as a reactor, a sediment collection structure is designed therein for collecting bottom solid scale; further, the sediment collection structure is configured as a funnel structure, the funnel nozzle is arranged in communication with the inlet of the solid-liquid separator through a pipeline, and the outlet of the solid-liquid separator is arranged in communication with the first backflow port above the sediment collection structure through a pipeline, so as to realize clean circulation. Further, the upper surface of the funnel body towards the side of the top of the main body is provided with a liquid outlet, and the liquid outlet is arranged towards the circumference of the funnel body, which is beneficial to the liquid outlet to form a clockwise or counterclockwise rotational flow, and the water rotational flow (similar to water vortex) is more beneficial to collect the bottom solid scale at the funnel nozzle directly below. Further, a first separation unit is designed outside the main body for separating out the scale and recycling effective sludge (i.e. realizing self-cleaning), and is convenient for maintenance and repair. Further, a second separation unit as a front stage can also be arranged inside the main body. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent upon consideration of the following detailed description, taken in conjunction with the accompanying drawings, in which:

[0023] Figure 1 a self-cleaning solid-liquid separation device according to some embodiments of the present disclosure is shown;

[0024] Figure 2 a top view of the upper surface of the funnel body in some embodiments is shown; and

[0025] In the various drawings, like or corresponding elements are denoted by like or corresponding reference numerals, wherein: self-cleaning solid-liquid separation device 100; main body 10; overflow port 12; overflow tank 12-1; second treatment liquid outlet 14; biogas input port 15; main body biogas outlet 16; funnel structure 20; funnel body 21; funnel nozzle 21-1; solid-liquid separator 22; sludge sorting pump 22-1; sludge sorter 22-2; heavy sludge outlet 22-2-1; liquid outlet 23; first backflow port 24-1; second backflow port 24-2; liquid storage cavity 25; liquid distribution pipe 25-1; liquid outlet inlet 25-2; liquid storage cavity inlet 25-3; first treatment liquid outlet 25-4; circulating pump 26; sludge bed 30; liquid to be treated 40; first separation unit 60-1; second separation unit 60-2; third separation unit 60-3; flushing pump 61; purified liquid outlet 60-1-1; sludge outlet 60-1-2; biogas outlet 60-1-3; sludge backflow pump 65. DETAILED DESCRIPTION

[0026] Embodiments of the present disclosure will be described below in greater detail with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be interpreted as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present disclosure are for exemplary purposes only and are not intended to limit the scope of protection of the present disclosure.

[0027] In the description of embodiments of the present disclosure, the term "comprising" and its conjugations are to be understood to be open-ended, i.e., not limiting to an embodiment having additional elements or steps. The term "based on" is to be understood as "based at least in part on". The term "one embodiment" or "an embodiment" are to be understood not to refer to one and the same embodiment; rather, they refer to "at least one". The term "first", "second" and the like can refer to different or corresponding objects. Other explicit or implicit definitions can also be included below.

[0028] It is understood that the existing anaerobic reactor is prone to form calcium carbonate, calcium phosphate or magnesium ammonium phosphate and other solid water scale inside the reactor tank wall, pipeline and bottom, and inside the anaerobic microorganism when treating high-solid or high-scaling ion (such as calcium ion or phosphate) containing wastewater for a long time. These water scales can cause the following problems: sedimentation, blockage or collapse of the distribution system at the bottom. The reactor bottom is prone to form dead zones. Due to the release of carbon dioxide, the alkalinity increases, which is prone to scale and block the effluent pipe, causing poor water discharge or the risk of tank rupture. The solid water scale accumulates inside the three-phase separator, causing the three-phase separator to be blocked and fail. The inside of the anaerobic sludge is scaled, causing the anaerobic sludge to be inorganic, and the treatment capacity of the anaerobic reactor to decrease or fail. These inorganic sludge will further break down and be lost, causing the amount of sludge in the reactor to continuously decrease. It costs a lot to supplement the lost anaerobic sludge. Scaling can cause the treatment capacity of the anaerobic reactor to decrease, and the reactor to be blocked, which requires cost to clean the reactor. The reactor needs to be shut down for maintenance during maintenance, cannot be used, and affects the overall treatment capacity of the plant.

[0029] To solve one or more of the above technical problems, the present disclosure proposes a self-cleaning solid-liquid separation device.

[0030] The following will be described in detail in conjunction with the drawings.

[0031] Figure 1 A diagram of a self-cleaning solid-liquid separation device according to some embodiments of the present disclosure is shown. In this illustrated embodiment, the self-cleaning solid-liquid separation device 100 includes a main body 10 configured as a tank structure having a hollow chamber, a sludge collection structure is provided at the lower part inside the main body 10; the sludge collection structure is configured as a funnel structure 20, the upper opening edge of the funnel body 21 of the funnel structure 20 is provided to be connected with the side wall of the main body 10, the bottom of the funnel body 21 of the funnel structure 20 is provided with a funnel nozzle 21-1, the funnel nozzle 21-1 is provided to communicate with the inlet of a solid-liquid separator 22 (for example, a sludge separator 22-2, which can be pumped by a sludge separation pump 22-1) through a pipeline, the outlet of the solid-liquid separator 22 is provided to communicate with a first backflow port 24-1 above the sludge collection structure through a pipeline. It is understood that the funnel structure 20 can also be designed as an inverted cone structure, since the inverted cone structure maintains a certain slope, so that the solid residues formed inside the main body (reactor) can automatically slide to the bottom of the cone (i.e. the funnel nozzle 21-1 towards the bottom).

[0032] Further, in some embodiments, the funnel body 21 of the funnel structure 20 is provided with liquid outlets 23 on the upper surface of the side of the top of the main body 10, and the liquid outlets 23 are arranged towards the circumferential direction of the funnel body 21. It should be understood that the liquid outlets 23 are arranged towards the circumferential direction of the funnel body 21, which means that the liquid outlets 23 are arranged towards the circumferential direction of the circular structure of the upper surface of the side of the top of the main body 10, for example, as shown in Figure 1 the upper surface of the side of the top of the main body 10 is regarded as a circle (a circular structure with the center axis of the funnel nozzle 21-1 as the center), and the liquid outlets 23 are arranged towards the circumferential direction of the circular structure, for example, as shown in Figure 1 for example, the liquid outlets 23 are arranged exactly towards the paper surface outwardly and perpendicularly to the paper surface, or the liquid outlets 23 are arranged exactly towards the paper surface inwardly and perpendicularly to the paper surface.

[0033] Further, in some embodiments, along the radial direction of the funnel body 21, for example, from the funnel nozzle 21-1 to the upper opening edge of the funnel body 21 (i.e., the connection with the side wall of the main body 10) of the upper surface of the side of the top of the main body 10, the upper surface of the funnel body 21 is provided with a plurality of liquid outlets 23 arranged in a line at intervals, and the plurality of liquid outlets 23 are arranged towards the same clockwise circumferential direction or counterclockwise circumferential direction of the funnel body 21; further, in some embodiments, along the circumferential direction of the funnel body 21 (i.e., the circumferential direction of the circle), the upper surface of the funnel body 21 is provided with a plurality of liquid outlets 23 arranged in a line at intervals, and the plurality of liquid outlets 23 are arranged towards the same clockwise circumferential direction or counterclockwise circumferential direction of the funnel body. Specifically, reference can be made to Figure 2 for example, the upper surface of the side of the top of the main body 10 is regarded as a circle (a circular structure with the center axis of the funnel nozzle 21-1 as the center), and the liquid outlets 23 are arranged towards the circumferential direction of the circular structure, for example, as shown in Figure 2 for example, the liquid outlets 23 are arranged exactly towards the paper surface outwardly and perpendicularly to the paper surface, or the liquid outlets 23 are arranged exactly towards the paper surface inwardly and perpendicularly to the paper surface. Figure 2 for example, the upper surface of the side of the top of the main body 10 is regarded as a circle (a circular structure with the center axis of the funnel nozzle 21-1 as the center), and the liquid outlets 23 are arranged towards the circumferential direction of the circular structure, for example, as shown in Figure 2 for example, the liquid outlets 23 are arranged exactly towards the paper surface outwardly and perpendicularly to the paper surface, or the liquid outlets 23 are arranged exactly towards the paper surface inwardly and perpendicularly to the paper surface.

[0034] Further, in some embodiments, a liquid storage cavity 25 is provided between the lower surface of the funnel body 21 of the funnel structure 20 towards the bottom side of the main body 10 and the inner wall of the main body 10.

[0035] Further, in some embodiments, a liquid distribution pipe 25-1 is provided in the liquid storage cavity 25, which is configured to be connected to the liquid inlet (such as the liquid outlet inlet 25-2 and the liquid storage cavity inlet 25-3 as shown, for providing liquid (e.g. water) to the liquid outlet 23 and the liquid storage cavity 25 respectively) and the first treated liquid outlet 25-4 (for recycling the liquid by a recycling pump 26) via pipes. It should be understood that the liquid storage cavity 25 needs to be filled with liquid to support the funnel body 21 of the funnel structure 20, otherwise the funnel body 21 can be crushed if the pressure difference between the upper and lower surfaces of the funnel body 21 is too large.

[0036] Further, in some embodiments, a first liquid concentration sensing device is provided on the sidewall of the main body 10 above the funnel structure 20, and the first backflow port 24-1 is configured to be higher than the first liquid concentration sensing device (not shown) for monitoring the height of the sludge bed 30, as indicated by the dotted line in the figure.

[0037] Further, in some embodiments, a second liquid concentration sensing device is provided on the sidewall of the main body 10 above the funnel structure 20, and the second liquid concentration sensing device is configured to be higher than the first backflow port 24-1.

[0038] Further, in some embodiments, a plurality of third liquid concentration sensing devices are provided on the sidewall of the main body 10 above the funnel structure 20 from bottom to top. The plurality of third liquid concentration sensing devices can be used to detect the height of the sludge bed 30 and the treated liquid 40. Because in actual use, the main body 10 of the device 100 cannot know the height of the sludge bed 30 and the treated liquid 40.

[0039] Further, in some embodiments, an overflow port 12 is provided on the sidewall of the main body 10 above the funnel structure 20, and the overflow port 12 is configured to be higher than the second liquid concentration sensing device (not shown) for monitoring the height of the treated liquid 40, as indicated by the dotted line in the figure.

[0040] Further, in some embodiments, the main body 10 is provided with a second treated liquid outlet 14 on the sidewall above the funnel structure 20, which is connected to the first separation unit 60-1 through a pipeline; the first separation unit 60-1 is connected to the second backflow port 24-2 through a pipeline; the second backflow port 24-2 is arranged inside the main body 10 higher than the first liquid concentration sensing device (for monitoring the position height of the sludge bed 30) but lower than the second treated liquid outlet 14. It should be understood that the second treated liquid outlet 14 has an overflow function, which is directly connected to the overflow tank 12-1 through a pipeline to deal with the overflow problem and ensure that the position height of the treated liquid 40 is appropriate, so that the entire device does not fail to operate due to the position height problem of the treated liquid 40. It should be understood that the first separation unit 60-1 is used for separating sludge and water; the separated sludge is pumped back into the main body through a low shear pump to maintain the total amount of sludge in the main body.

[0041] Further, in some embodiments, the main body 10 is further provided with a second separation unit 60-2, which is configured to communicate with the inlet of the first separation unit 60-1 via the second treatment liquid outlet 14 through a pipeline; the first separation unit 60-1 is configured to communicate with the second backflow port 24-2 through a pipeline (via a sludge backflow pump 65); the second separation unit 60-2 is further provided with a purified liquid outlet 60-1-1, which is configured to communicate with the inlet of the first separation unit 60-1 through a pipeline via a flushing pump 61; thereby forming a multi-cycle cleaning treatment of the first separation unit 60-1; also via the flushing pump 61, the purified liquid outlet 60-1-1 of the first separation unit 60-1 can be connected to the sludge outlet 61-1-2 of the first separation unit 60-1; it should be understood that generally, the sludge outlet 61-1-2 of the first separation unit 60-1 should be close to the bottom of the first separation unit 60-1 so as to obtain the sludge part in the first separation unit 60-1, and the purified liquid outlet 60-1-1 of the first separation unit 60-1 should be higher than the sludge outlet 61-1-2, generally slightly lower than the liquid level in the first separation unit 60-1, so as to obtain the liquid of the cleaner part on the upper layer. It should be further understood that the liquid from the purified liquid outlet 60-1-1 of the first separation unit 60-1 can be directly connected to the rear end, or can be added with a cleaning agent and then returned to the inlet of the first separation unit 60-1 via the flushing pump 61 (to realize a cycle cleaning to improve the cleaning degree), while another branch is transmitted to the vicinity of the sludge outlet 61-1-2 of the first separation unit 60-1, to improve the flowability of the sludge discharged from the sludge outlet 61-1-2, so that the sludge output from the sludge outlet 61-1-2 returns to the second backflow port 24-2 via the sludge backflow pump 65, thereby entering the rear end to fall into the vicinity of the sludge bed. It should be understood that the second separation unit 60-2 can be designed on the top of the main body, for removing the biogas in the sludge. Alternatively, the second separation unit 60-2 can be designed outside the main body, and the biogas pipe of the second separation unit 60-2 is connected to the top cover of the device 100. Alternatively, the device 100 can further increase one set of second separation unit 60-2, and the water outlet of the second separation unit 60-2 is circulated to the water distribution system by a circulating pump, for maintaining sufficient flow of the inlet water and realizing sufficient stirring at the bottom. In the illustrated embodiment, another set of second separation unit 60-2 can be a third separation unit 60-3. It should be further understood that when the second separation unit 60-2 exists, the first separation unit 60-1 becomes a second-stage separation unit for separating the sludge and water; the separated sludge is pumped back into the reactor by a low-shear pump, to maintain the total amount of sludge in the reactor. The external first separation unit 60-1 is provided with a backwashing pump (flushing pump 61), which can periodically pump the water or additional cleaning agent back to the external separation unit for cleaning.

[0042] Further, in some embodiments, the first separation unit 60-1 further comprises a biogas outlet 60-1-3 to deliver biogas inside the first separation unit 60-1 back to the biogas inlet 15 at the top of the main body 10 via a pipe. In addition, as shown in the illustrated embodiment, a main body biogas outlet 16 can also be provided at the top of the main body 10 to adjust the pressure inside the main body 10.

[0043] Further, in some embodiments, a solid-liquid separation pump 22-1 is provided between the funnel nozzle 21-1 and the inlet of the solid-liquid separator 22-2 to increase the kinetic energy (flow rate) of the liquid to the solid-liquid separator 22-2; and the solid-liquid separator is further provided with a heavy sludge outlet 22-2-1 to discharge heavy sludge.

[0044] Further, in some embodiments, the main body 10 is provided with a third separation unit 60-3 above the funnel structure 20, the inlet (not shown, but provided on the third separation unit 60-3) of the third separation unit 60-3 is provided below the second liquid concentration sensing device (for monitoring the position height of the treated liquid 40), and the first treated liquid outlet 25-4 of the third separation unit 60-3 is provided to communicate with the liquid inlet (such as the illustrated liquid outlet inlet 25-2 and the liquid storage chamber inlet 25-3) at the bottom of the main body via a pipe.

[0045] Further, in some embodiments, the top of the main body 10 directly above is further provided with a water seal tank 18.

[0046] It should be understood that the present disclosure is not intended to invent a new liquid concentration sensing device, which can use corresponding optical, electrical, mechanical sensing devices for liquid concentration monitoring. And by monitoring to confirm that when the sludge bed 30 position is too high, the funnel nozzle 21-1 needs to be opened to quickly discharge sludge, and when it is confirmed that the sludge bed 30 position is appropriate, the funnel nozzle 21-1 can be closed to ensure the effective operation of the entire device 100. Correspondingly, the overflow port 12, the liquid outlet 23, and other liquid inlet and outlet ports can be provided with a switch valve.

[0047] The above has described various embodiments of the present disclosure, and the above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles, practical applications, or technical improvements in the market of the embodiments, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

[0048] The above merely describes optional embodiments of the present disclosure, and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A self-cleaning solid-liquid separation apparatus, characterized by, Comprising: a main body configured as a tank structure having a hollow chamber, a sludge collection structure being provided at a lower portion inside the main body; the sludge collection structure is configured as a funnel structure, an upper opening edge of a funnel body of the funnel structure is provided to be connected with a side wall of the main body, a bottom of the funnel body of the funnel structure is provided with a funnel nozzle, the funnel nozzle is provided to be communicated with an inlet of a solid-liquid separator through a pipeline, an outlet of the solid-liquid separator is provided to be communicated with a first backflow port above the sludge collection structure through a pipeline.

2. The self-cleaning solid-liquid separation device according to claim 1, wherein an upper surface of the funnel body of the funnel structure towards a side of a top of the main body is provided with a liquid outlet, the liquid outlet is provided to be towards a circumferential direction of the funnel body.

3. The self-cleaning solid-liquid separation device according to claim 2, wherein along a radial direction of the funnel body, the upper surface of the funnel body is provided with a plurality of liquid outlets arranged in a line at intervals, the plurality of liquid outlets are provided to be towards a same clockwise circumferential direction or a counterclockwise circumferential direction of the funnel body.

4. The self-cleaning solid-liquid separation device according to claim 3, wherein along a circumferential direction of the funnel body, the upper surface of the funnel body is provided with a plurality of liquid outlets arranged in a line at intervals, the plurality of liquid outlets are provided to be towards a same clockwise circumferential direction or a counterclockwise circumferential direction of the funnel body.

5. The self-cleaning solid-liquid separation device according to claim 2, wherein a liquid storage cavity is provided between a lower surface of the funnel body of the funnel structure towards a side of a bottom of the main body and an inner wall of the main body.

6. The self-cleaning solid-liquid separation device according to claim 5, wherein a liquid distribution pipe is provided in the liquid storage cavity, the liquid distribution pipe is provided to be communicated with an inlet and a first treatment liquid outlet through a pipeline.

7. The self-cleaning solid-liquid separation device according to claim 6, wherein a first liquid concentration sensing device is provided on a side wall of the main body above the funnel structure, the first backflow port is provided to be higher than the first liquid concentration sensing device.

8. The self-cleaning solid-liquid separation device according to claim 7, wherein a second liquid concentration sensing device is provided on the side wall of the main body above the funnel structure, the second liquid concentration sensing device is provided to be higher than the first backflow port.

9. The self-cleaning solid-liquid separation device according to claim 7, wherein a plurality of third liquid concentration sensing devices are provided on the side wall of the main body above the funnel structure from bottom to top.

10. The self-cleaning solid-liquid separation device according to claim 8, wherein an overflow port is provided on the side wall of the main body above the funnel structure, the overflow port is provided to be higher than the second liquid concentration sensing device.

11. The self-cleaning solid-liquid separation device according to claim 8, wherein The side wall of the main body above the funnel structure is provided with a second treatment liquid outlet, which is arranged to communicate with the first separation unit through a pipeline; the first separation unit is arranged to communicate with the second backflow port through a pipeline; the second backflow port is arranged inside the main body higher than the first liquid concentration sensing device but lower than the second treatment liquid outlet.

12. The self-cleaning solid-liquid separation device according to claim 11, characterized in that, The main body is further provided with a second separation unit, which is arranged to communicate with the first separation unit through a pipeline via the second treatment liquid outlet.

13. The self-cleaning solid-liquid separation device according to claim 1, characterized in that, A solid-liquid separation pump is arranged between the funnel nozzle and the inlet of the solid-liquid separator, and the solid-liquid separator is further provided with a heavy residue outlet.

14. The self-cleaning solid-liquid separation device according to claim 7, characterized in that, The main body is provided with a third separation unit above the funnel structure, the inlet of the third separation unit is arranged to be lower than the second liquid concentration sensing device, and the outlet of the third separation unit is arranged to communicate with the liquid inlet at the bottom of the main body through a pipeline.

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