Sewage treatment system and method

Abstract

The invention relates to a sewage treatment system and method, and belongs to the technical field of sewage treatment. A sewage treatment system comprises: a stirring device; the water inlet end of the high-pressure sewage pump is communicated with the stirring device; the filtering tank body is provided with a containing cavity, the containing cavity is provided with a sewage inlet and an air inlet, the water outlet end of the high-pressure sewage pump is communicated with the sewage inlet, and the air inlet is used for being communicated with a compressed air supply system; the filter element assembly is provided with a mounting cavity, and the mounting cavity is communicated with the air inlet; a main control system; the filtering tank body is provided with a sludge discharge port, the sludge collecting barrel is provided with an opening, and the opening is opposite to the sludge discharge port. The sewage is stirred by the stirring device, so that the sewage is fully mixed before entering the filtering process. The filter element assembly can effectively filter sludge in sewage, and when the sludge on the filter element assembly is accumulated to a certain thickness, compressed air can enter the mounting cavity from the air inlet to clean the sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a sewage treatment system and method. Background Art

[0002] In the sewage treatment process, the role of the filter device is crucial. Its main purpose is to intercept solid particles, suspended matter and other pollutants in the sewage, so as to achieve the initial purification of the sewage. However, the filter device in the traditional sewage treatment system has the problem of poor automatic cleaning effect. Due to long-term operation and accumulation of pollutants, the surface of the filter device is prone to blockage, resulting in reduced filtration efficiency. In addition, the cleaning process of traditional filter devices often relies on manual operation, which is not only inefficient, but also increases operating and maintenance costs. Summary of the invention

[0003] Based on this, it is necessary to provide a sewage treatment system and method to address the problem that the filtering device of traditional sewage treatment equipment has poor self-cleaning effect, resulting in low sewage treatment efficiency.

[0004] A sewage treatment system, comprising: a stirring device, the stirring device is used to receive sewage sent from a workshop; a high-pressure sewage pump, the water inlet end of the high-pressure sewage pump is connected to the stirring device; a filter tank body, the filter tank body is provided with a accommodating chamber, the accommodating chamber is provided with a sewage inlet and an air inlet, the water outlet end of the high-pressure sewage pump is connected to the sewage inlet, and the air inlet is used to communicate with a compressed air supply system; a filter element assembly, the filter element assembly is arranged on the filter tank body and located in the accommodating chamber, the filter element assembly is provided with an installation cavity, and the installation cavity is connected to the air inlet; a main control system, the main control system includes a control assembly and a manipulation assembly, the stirring device, the high-pressure sewage pump and the manipulation assembly are electrically connected to the control assembly respectively; a sludge collection barrel, the filter tank body is provided with a sludge discharge port, the sludge collection barrel is provided with an opening, and the opening is arranged opposite to the sludge discharge port.

[0005] The first aspect of the present application discloses a sewage treatment system, which receives and stirs sewage through a stirring device, so as to ensure that the sewage is fully mixed before entering the filtering process, thereby improving the treatment efficiency. In addition, by adding additives such as flocculants and loosening agents during the stirring process, the sewage can be more fully mixed, which is convenient for the next treatment process. At the same time, this pretreatment can remove most of the pollutants such as microorganisms and heavy metal ions in the sewage, making it easier for the sewage to meet the discharge standard. The setting of the high-pressure sewage pump enables the sewage to be continuously transported to the filter tank after stirring, thereby ensuring the continuity of the treatment process and reducing the risk of treatment interruption. The filter element assembly is arranged on the filter tank and located in the accommodating chamber, and can effectively filter the sludge in the sewage so that the sewage meets the discharge standard. The filter tank is provided with an air inlet for communicating with a compressed air supply system. When the sludge on the filter element assembly accumulates to a certain thickness, the sewage is stopped from being transported, and the compressed air enters the installation chamber from the air inlet to make the sludge fall off, thereby achieving the purpose of cleaning the sludge on the filter element assembly. The stirring device, high-pressure sewage pump and control components are all electrically connected to the control component, so that the operator can realize intelligent operation through the control component and improve the automation of the equipment. The opening of the sludge collection bucket is arranged opposite to the sludge discharge port of the filter tank, which simplifies the sludge discharge process and makes sludge discharge more convenient and quick.

[0006] In any of the above technical solutions, it also includes a filter element cleaning structure, which is arranged on the filter element assembly, and part of the filter element cleaning structure is located in the installation cavity. The filter element cleaning structure is provided with a water outlet, and the filter element cleaning structure is used to clean the sludge attached to the filter element assembly. High-pressure compressed air can enter the installation cavity from the air inlet, and the filter element cleaning structure is installed in the installation cavity, and the filter element cleaning structure is provided with a water outlet. The high-pressure compressed air and a small amount of water sprayed from the water outlet can cooperate to form high-pressure water vapor, thereby cleaning the filter element assembly from the inside to the outside, and effectively removing the sludge attached to the filter element assembly. The automatic cleaning function of the filter element cleaning structure and the high-pressure compressed air helps to efficiently clean the sludge attached to the filter element assembly. This automated cleaning method improves the treatment efficiency of the sewage treatment system.

[0007] In any of the above technical solutions, the filter element assembly includes a filter element body and a mounting portion, the filter element body is arranged on the filter tank body, the filter element body is provided with a filter cavity, the mounting portion is arranged on the filter element body and is located in the filter cavity, and the mounting portion is provided with the mounting cavity; the filter element cleaning structure includes a pipe assembly and an atomizing nozzle, the pipe assembly is arranged on the mounting portion, a part of the pipe assembly is located in the mounting cavity, the pipe assembly is provided with the water outlet, the part of the pipe assembly provided with the water outlet extends out of the mounting cavity, and the atomizing nozzle is arranged on the filter element assembly and the pipe assembly, and the atomizing nozzle is located at the water outlet. The filter element cleaning structure is arranged on the mounting part and is installed on the filter element body through the mounting part and is located in the filter cavity. The high-pressure compressed air entering the mounting cavity cooperates with the filter element cleaning structure to convert the water outputted by the filter element cleaning structure into high-pressure water vapor and diffuse it into the filter cavity, so that the high-pressure water vapor penetrates and cleans the filter element body from the inside to the outside, which helps to make the sludge attached to the filter element body fall off more efficiently and thoroughly. The atomizing nozzle is located at the water outlet. When the water flowing through the pipe assembly is outputted from the water outlet, the high-pressure compressed air entering the mounting cavity can cooperate with the atomizing nozzle to convert the water outputted from the water outlet into high-pressure and fine water vapor, clean the filter element assembly, and completely fall off the sludge attached to the filter element assembly. Effective cleaning can reduce the accumulation of dirt on the filter element assembly, thereby extending the service life of the filter element assembly and reducing the replacement frequency and cost.

[0008] In any of the above technical solutions, the pipe assembly includes a water pipe and a water outlet, the water pipe is arranged on the filter element assembly and is located in the installation cavity, one end of the water outlet is arranged on the water pipe, the end of the water outlet away from the water pipe extends out of the installation cavity, the end of the water outlet away from the water pipe is provided with the water outlet hole, the water outlet hole is connected to the water pipe, and the atomizing nozzle is sleeved on the water outlet. The modular design of the filter element assembly and the pipe assembly allows for quick disassembly and installation when the filter element assembly needs to be replaced or the filter element cleaning structure needs to be maintained. The water outlet part is provided with an end of the water outlet hole extending out of the installation cavity, and the atomizing nozzle is sleeved on the water outlet part. When the water flowing through the water pipe is discharged from the water outlet hole, the high-pressure compressed air entering the installation cavity is sprayed out from the atomizing nozzle, which can convert the water output from the water outlet hole into high-pressure water vapor. The high-pressure water vapor will penetrate and clean the filter element assembly from the inside to the outside, so that the sludge attached to the filter element assembly can be removed more thoroughly and efficiently.

[0009] In any of the above technical solutions, the atomizing nozzle is provided with a limit groove, and part of the filter element assembly is adapted to the limit groove. The design that part of the filter element assembly is adapted to the limit groove can ensure the stability and reliability of the atomizing nozzle during use, thereby improving the overall reliability of the sewage treatment system.

[0010] In any of the above technical solutions, the atomizing nozzle is provided with an adapting hole and a compressed gas through hole, the compressed gas through hole is arranged around the circumference of the adapting hole, the compressed gas through hole is communicated with the installation cavity, and part of the pipe assembly is adapted to the adapting hole. By adapting part of the pipe assembly to the adapting hole, the compressed gas through hole is arranged around the circumference of the adapting hole, and the compressed gas through hole is communicated with the installation cavity, the high-pressure compressed air entering the installation cavity can be output from the compressed gas through hole, and the water output from the pipe assembly is converted into high-pressure water vapor to clean the filter element assembly. The structural design in which part of the pipe assembly is adapted to the adapting hole ensures a tight connection between the atomizing nozzle and the pipe assembly, which not only improves the reliability of the equipment, but also ensures the continuity and stability of the conversion of water into high-pressure water vapor.

[0011] In any of the above technical solutions, the number of the water outlet holes and the atomizing nozzles are both multiple, and the multiple water outlet holes correspond to the multiple atomizing nozzles one-to-one. The multiple water outlet holes correspond to the multiple atomizing nozzles one-to-one, so that the multiple atomizing nozzles work in parallel, forming high-pressure water vapor over a large area, greatly improving the cleaning effect of the filter element assembly.

[0012] In any of the above technical solutions, the mounting part includes a mounting part body and a limiting part, the mounting part body is arranged on the filter element body, the limiting part is arranged on the mounting part body, and part of the filter element cleaning structure is adapted to the limiting part. By arranging the limiting part on the mounting part body, and part of the filter element cleaning structure is adapted to be installed with the limiting part, a stable connection between the filter element cleaning structure and the mounting part is ensured, shaking or displacement of the filter element cleaning structure during operation is avoided, and the stability and reliability of the system are improved.

[0013] In any of the above technical solutions, the stirring device includes a cylinder and a stirrer, the cylinder is provided with a sewage stirring chamber, the stirrer is arranged on the cylinder, and part of the stirrer extends into the sewage stirring chamber. The stirrer part extends into the sewage stirring chamber, so that the sewage is fully stirred in the sewage stirring chamber. When it is necessary to add additives to pre-treat the sewage, the stirring action of the stirrer helps to accelerate the chemical reaction and biological degradation process, thereby improving the effect of sewage treatment.

[0014] In any of the above technical solutions, the stirring device also includes a flocculant adding machine, which is arranged on the cylinder, and the flocculant adding machine is provided with a first additive outlet, which is connected to the sewage stirring chamber. By providing a flocculant adding machine, the flocculant can be dissolved into a liquid flocculant in advance, so that after the fully dissolved flocculant is added to the sewage stirring chamber, it can be more quickly mixed with the sewage and react. The design of the connection between the first additive outlet and the sewage stirring chamber ensures that the flocculant can be quickly added to the sewage, thereby improving the treatment efficiency.

[0015] In any of the above technical solutions, the stirring device further includes a loosening agent adding machine, the loosening agent adding machine is arranged on the cylinder, the loosening agent adding machine is provided with a second additive outlet, and the second additive outlet is connected to the sewage stirring chamber. The integrated design of the loosening agent adding machine and the cylinder makes the overall structure of the stirring device more compact. The second additive outlet of the loosening agent adding machine is directly connected to the sewage stirring chamber, ensuring that the loosening agent can be quickly added to the sewage, thereby improving the sewage treatment effect.

[0016] In any of the above technical solutions, the filtration tank includes a tank body and a sludge discharge valve, the tank body is provided with a sludge discharge port, the sludge discharge valve is arranged on the tank body and located at the sludge discharge port, and the sludge discharge valve is used to control the opening of the sludge discharge port. By integrating the sludge discharge valve on the tank body and locating the sludge discharge valve at the sludge discharge port, additional pipes and connectors are reduced, the system structure is simplified, and the sludge discharge process is made more direct and convenient. The operator can quickly control the discharge of sludge, which improves the convenience and efficiency of operation. In addition, the sludge discharge valve can adopt a butterfly valve, which only needs to rotate the valve stem to control the opening, and can be more easily combined with an automatic control system to achieve automatic control of sludge discharge.

[0017] In any of the above technical solutions, a housing assembly is also included, wherein the housing assembly is provided with an installation space and a filter tank installation cavity, the high-pressure sewage pump is arranged on the housing assembly and is located in the installation space, and the filter tank is arranged on the housing assembly and is located in the filter tank installation cavity. The housing assembly is provided with an installation space and a filter tank installation cavity, and the high-pressure sewage pump and the filter tank are integrated in the internal space of the housing assembly, so that the overall structure of the sewage treatment system is more compact, and the space occupied by the overall equipment is reduced. The high-pressure sewage pump and the filter tank are respectively arranged at specific positions of the housing assembly, so that the equipment is optimized and the equipment is easy to maintain.

[0018] In any of the above technical solutions, a compressed gas supply system is further included, and the gas outlet of the compressed gas supply system is connected to the gas inlet. By connecting the gas outlet of the compressed gas supply system to the gas inlet, high-pressure compressed air can be introduced into the installation cavity from the gas inlet, so that the high-pressure compressed air cooperates with the filter element cleaning structure, thereby achieving a cleaning effect on the filter element assembly.

[0019] In any of the above technical solutions, it also includes a detection device and a circulation device. The detection device is arranged on the filter tank body, and the detection device is used to detect the water quality of the sewage after filtration; the filter tank body is provided with a water outlet, and the water outlet is connected to the accommodating chamber, the water inlet end of the circulation device is connected to the water outlet, and the water outlet end of the circulation device is connected to the stirring device. By setting up a detection device, the water quality of the sewage after filtration is detected to determine whether the filtered sewage meets the discharge standard. The water inlet end and the water outlet end of the circulation device are respectively connected to the water outlet and the stirring device. The setting of the circulation device allows the water that does not meet the discharge standard after detection by the detection device to be sent back to the stirring device for treatment, further improving the automation of the sewage treatment system.

[0020] In any of the above technical solutions, an automatic pressure relief valve is also included, and the automatic pressure relief valve is arranged on the filter tank body, and the automatic pressure relief valve is connected to the accommodating chamber. After the high-pressure compressed air and the filter element cleaning structure complete the cleaning of the filter element assembly, the pressure in the accommodating chamber is too high, and the sludge discharge valve cannot be opened directly to discharge the sludge. The automatic pressure relief valve can quickly relieve the pressure of the accommodating chamber after the step of cleaning the filter element assembly is completed, speeding up the next process, and ensuring the reliability and safety of the sewage treatment system.

[0021] In any of the above technical solutions, a clean water supply system is also included, and the clean water supply system is used to supply clean water to the filter element cleaning structure. By using the clean water supply system to supply clean water to the filter element cleaning structure, it can be ensured that the filter element assembly will not be contaminated again by impurities or pollutants during the cleaning process, thereby improving the cleaning efficiency and the service life of the filter element assembly.

[0022] A sewage treatment method comprises the following steps: S1, starting a stirring device to fully mix the sewage in a sewage stirring chamber; S2, starting a high-pressure sewage pump to transport the sewage in the sewage stirring chamber to a filter tank for filtration; S3, the sewage flows through a filter element assembly for filtration, and the filtered sewage flows through a detection device for detection; S4, monitoring the thickness of a sludge cake in the filter tank, and when the sludge cake reaches a preset thickness, stopping the high-pressure sewage pump; S5, starting a clean water supply system to supply water to a filter element cleaning structure, and starting a compressed gas supply system to clean the filter element assembly; S6, after the filter element assembly is cleaned, closing the clean water supply system and the compressed gas supply system, starting the automatic pressure relief valve, and after the filter tank is fully depressurized, opening the sludge discharge valve to discharge the sludge.

[0023] The second aspect of the present application discloses a sludge treatment method, which fully mixes the sewage in the sewage stirring chamber by starting a stirring device, thereby ensuring the uniformity of the sewage in the subsequent treatment process. The sewage is quickly sent into the filter tank for filtration by a high-pressure sewage pump. Filtering through the filter element assembly can effectively remove pollutants such as suspended matter and impurities in the sewage, so that the filtered sewage meets the discharge standard. When the sludge cake reaches a preset thickness, the filtration step is stopped and the accumulated sludge is cleaned to ensure the sustainable use of the filter element assembly. Through the cooperation of the clean water supply system and the compressed gas supply system, the filter element assembly is cleaned, and the sludge attached to the filter element assembly is effectively and efficiently removed, further improving the efficient conduct of the sewage treatment process. The application of the automatic pressure relief valve makes the pressure relief process of the filter tank safer and more convenient. By accurately controlling the operation of the stirring device, the high-pressure sewage pump, the clean water supply system and the compressed gas supply system, the automation degree of the sewage treatment process is improved. The filtered sewage is detected by the detection device to ensure that the treated water meets the discharge standard.

[0024] In any of the above technical solutions, in step S1, the specific steps of starting the stirring device to fully mix the sewage in the sewage stirring chamber are as follows: S11. When the water level in the sewage stirring chamber reaches the preset water level line, start the agitator to stir and mix the sewage; S12. Start the flocculant adding machine, and after the flocculant is fully dissolved, add the dissolved liquid flocculant into the sewage stirring chamber; S13. Start the loosening agent adding machine to add the loosening agent into the sewage stirring chamber; S14. Keep the agitator turned on to mix the flocculant and loosening agent added to the sewage stirring chamber with the sewage evenly.

[0025] By starting the stirring device, the sewage, flocculant and loosening agent in the sewage stirring chamber are fully mixed, which can further improve the sewage treatment efficiency. By adding the flocculant to the sewage stirring chamber after it is fully dissolved, it is helpful to better remove fine suspended particles and colloidal substances in the sewage. By starting the loosening agent adding machine and adding the loosening agent to the sewage stirring chamber, the sewage treatment effect can be further improved. The loosening agent can help improve the sedimentation performance and dewatering performance of the sludge, thereby optimizing the entire sewage treatment process. Continuously starting the agitator until the added flocculant and loosening agent are stirred and mixed with the sewage evenly, not only helps to improve the treatment effect, but also can avoid problems caused by excessive or low concentrations of local treatment agents. In any of the above technical solutions, in the step S3, the filtered sewage flows through the detection device for detection, and the sewage that meets the qualified discharge standards is discharged or recycled, and the sewage that does not meet the qualified discharge standards is returned to the stirring device through the circulation device to continue mixing and stirring, and the next filtering process is carried out. The filtered sewage is detected in real time by the detection device to ensure that only sewage that meets the qualified discharge standards will be discharged or recycled, thereby protecting the environment and avoiding pollution. For sewage that does not meet the discharge standards, it is returned to the mixing device through the circulation device for further treatment, which improves the automation and efficiency of the treatment process. Automated circulation treatment reduces the need for manual monitoring and operation, thereby reducing the labor cost of sewage treatment.

[0026] In any of the above technical solutions, in step S5, the specific steps for cleaning the filter element assembly are as follows: S51, start the clean water supply system to supply clean water to the filter element cleaning structure; S52, start the compressed gas supply system to deliver high-pressure compressed air to the installation cavity of the filter element assembly; S53, the water and high-pressure compressed air output by the filter element cleaning structure form high-pressure water vapor in the accommodating cavity under the action of the atomizing nozzle, and are sprayed toward the inner wall of the accommodating cavity, so that the sludge falls off the filter element assembly, thereby cleaning the filter element assembly.

[0027] By starting the clean water supply system and the compressed gas supply system, clean water and high-pressure compressed air are supplied at the same time, and high-pressure water vapor is formed. The high-pressure water vapor is sprayed from the inside to the outside in the filter element assembly, which can more effectively remove the sludge from the filter element assembly, greatly improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of the sewage treatment system; Figure 2 It is a structural schematic diagram of a high-pressure sewage pump and a filter tank; Figure 3 It is a schematic diagram of the structure of the filter tank and the sludge collection barrel; Figure 4 It is a first structural schematic diagram of the filter tank and the filter element assembly; Figure 5 A second structural schematic diagram of the filter tank and the filter element assembly; Figure 6 is a cross-sectional view of the filter element assembly; Figure 7 It is a three-dimensional diagram of the filter element cleaning structure; Figure 8 It is a cross-sectional view of the filter element cleaning structure; Fig. 9 It is a structural schematic diagram of the filter element cleaning structure and installation part; Fig.10 is a three-dimensional diagram of a stirring device; Fig.11 is a cross-sectional view of the stirring device; Fig.12 Schematic diagram of the sewage treatment process.

[0029] The corresponding relationship between the reference numerals and the component names is as follows: 1 stirring device, 11 cylinder, 12 stirrer, 13 flocculant adding machine, 14 loosening agent adding machine, 101 sewage stirring chamber; 2 high pressure sewage pump; 3 filter tank body, 31 tank body, 32 sludge discharge valve, 301 accommodating chamber, 302 sewage inlet, 303 air inlet, 304 sludge discharge outlet, 305 water outlet; 4 filter element assembly, 41 filter element body, 42 mounting portion, 421 mounting portion body, 422 limiting portion, 401 mounting cavity, 402 filter cavity; 5 filter element cleaning structure, 51 pipe fitting assembly, 511 water delivery pipe, 512 water outlet, 52 atomizing nozzle, 501 water outlet hole, 502 limiting groove, 503 adapter hole, 504 compressed gas through hole; 6. Main control system; 7. Sludge collection barrel; 8 shell assembly, 801 installation space, 802 filter tank installation cavity. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0032] The sewage treatment system and method according to some embodiments of the present invention are described below with reference to the accompanying drawings.

[0033] Embodiment 1, as Figures 1 to 12 As shown, the present embodiment discloses a sewage treatment system, comprising: a stirring device 1, the stirring device 1 is used to receive sewage sent from a workshop; a high-pressure sewage pump 2, the water inlet end of the high-pressure sewage pump 2 is connected to the stirring device 1; a filter tank body 3, the filter tank body 3 is provided with a accommodating chamber 301, the accommodating chamber 301 is provided with a sewage inlet 302 and an air inlet 303, the water outlet end of the high-pressure sewage pump 2 is connected to the sewage inlet 302, and the air inlet 303 is used to communicate with a compressed air supply system; a filter element assembly 4, the filter element assembly 4 is arranged on the filter tank body 3 and is located in the accommodating chamber 301, the filter element assembly 4 is provided with a mounting chamber 401, and the mounting chamber 401 is connected to the air inlet 303; a main control system 6, the main control system 6 includes a control assembly and a control assembly, the stirring device 1, the high-pressure sewage pump 2 and the control assembly are electrically connected to the control assembly respectively; a sludge collecting barrel 7, the filter tank body 3 is provided with a sludge discharge port 304, the sludge collecting barrel 7 is provided with an opening, and the opening is arranged opposite to the sludge discharge port 304.

[0034] The first aspect of the present application discloses a sewage treatment system. By receiving and stirring sewage through a stirring device 1, it can be ensured that the sewage is fully mixed before entering the filtering process, thereby improving the treatment efficiency. In addition, by adding additives such as flocculants and loosening agents during the stirring process, the sewage can be more fully mixed, which is convenient for the next treatment process. At the same time, this pretreatment can remove most of the pollutants such as microorganisms and heavy metal ions in the sewage, making it easier for the sewage to meet the discharge standard. The setting of the high-pressure sewage pump 2 enables the sewage to be continuously transported to the filter tank body 3 after stirring, ensuring the continuity of the treatment process and reducing the risk of treatment interruption. The filter element assembly 4 is arranged on the filter tank body 3 and located in the accommodating chamber 301, and can effectively filter the sludge in the sewage so that the sewage meets the discharge standard. The filter tank body 3 is provided with an air inlet 303 for communicating with a compressed air supply system. When the sludge on the filter element assembly 4 accumulates to a certain thickness, the sewage is stopped from being transported, and the compressed air enters the installation chamber 401 from the air inlet 303 to make the sludge fall off, thereby achieving the purpose of cleaning the sludge on the filter element assembly 4. The stirring device, high-pressure sewage pump and control components are all electrically connected to the control component, so that the operator can realize intelligent operation through the control component and improve the automation of the equipment. The opening of the sludge collection bucket is arranged opposite to the sludge discharge port of the filter tank, which simplifies the sludge discharge process and makes sludge discharge more convenient and quick.

[0035] like Figure 6 , Figure 7 and Figure 8As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines: it also includes a filter element cleaning structure 5, the filter element cleaning structure 5 is arranged on the filter element assembly 4, part of the filter element cleaning structure 5 is located in the installation cavity 401, the filter element cleaning structure 5 is provided with a water outlet 501, and the filter element cleaning structure 5 is used to clean the sludge attached to the filter element assembly 4. High-pressure compressed air can enter the installation cavity 401 from the air inlet 303, the filter element cleaning structure 5 is installed in the installation cavity 401, and the filter element cleaning structure 5 is provided with a water outlet 501. The high-pressure compressed air and a small amount of water sprayed from the water outlet 501 can cooperate to form high-pressure water vapor, thereby cleaning the filter element assembly 4 from the inside to the outside, and effectively removing the sludge attached to the filter element assembly 4. The automatic cleaning function of the filter element cleaning structure 5 and the high-pressure compressed air is helpful to efficiently clean the sludge attached to the filter element assembly 4. This automated cleaning method improves the treatment efficiency of the sewage treatment system.

[0036] like Figure 6 , Figure 7 and Figure 8 As shown, in addition to the features of the above embodiments, the present embodiment further defines: the filter element assembly 4 includes a filter element body 41 and a mounting portion 42, the filter element body 41 is arranged on the filter tank body 3, the filter element body 41 is provided with a filter cavity 402, the mounting portion 42 is arranged on the filter element body 41 and located in the filter cavity 402, and the mounting portion 42 is provided with a mounting cavity 401; the filter element cleaning structure 5 includes a pipe assembly 51 and an atomizing nozzle 52, the pipe assembly 51 is arranged on the mounting portion 42, a portion of the pipe assembly 51 is located in the mounting cavity 401, the pipe assembly 51 is provided with a water outlet 501, and the portion of the pipe assembly 51 provided with the water outlet 501 extends out of the mounting cavity 401, and the atomizing nozzle 52 is arranged on the filter element assembly 4 and the pipe assembly 51, and the atomizing nozzle 52 is located at the water outlet 501. The filter element cleaning structure 5 is installed on the filter element body 41 through the installation part 42 and is located in the filter cavity 402. The high-pressure compressed air entering the installation cavity 401 cooperates with the filter element cleaning structure 5 to convert the water output by the filter element cleaning structure 5 into high-pressure water vapor and diffuse it into the filter cavity 402, so that the high-pressure water vapor penetrates and cleans the filter element body 41 from the inside to the outside, which helps to make the sludge attached to the filter element body 41 fall off more efficiently and thoroughly. The atomizing nozzle 52 is located at the water outlet 501. When the water flowing through the pipe assembly 51 is output from the water outlet 501, the high-pressure compressed air entering the installation cavity 401 can cooperate with the atomizing nozzle 52 to convert the water output from the water outlet 501 into high-pressure and fine water vapor, clean the filter element assembly 4, and completely fall off the sludge attached to the filter element assembly 4. Effective cleaning can reduce the accumulation of dirt on the filter element assembly 4, thereby extending the service life of the filter element assembly 4 and reducing the replacement frequency and cost.

[0037] like Figure 8 and Fig. 9 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the pipe assembly 51 includes a water pipe 511 and a water outlet 512, the water pipe 511 is arranged on the filter element assembly 4 and is located in the installation cavity 401, one end of the water outlet 512 is arranged on the water pipe 511, the end of the water outlet 512 away from the water pipe 511 extends out of the installation cavity 401, the end of the water outlet 512 away from the water pipe 511 is provided with a water outlet hole 501, the water outlet hole 501 is connected with the water pipe 511, and the atomizing nozzle 52 is sleeved on the water outlet 512. Through the modular design of the filter element assembly 4 and the pipe assembly 51, when the filter element assembly 4 needs to be replaced or the filter element cleaning structure 5 needs to be maintained, it can be quickly disassembled and installed. The water outlet portion 512 is provided with an end of the water outlet hole 501 extending out of the installation cavity 401, and the atomizing nozzle 52 is sleeved on the water outlet portion 512. When the water flowing through the water pipe 511 is output from the water outlet hole 501, the high-pressure compressed air entering the installation cavity 401 is sprayed out from the atomizing nozzle 52, which can convert the water output from the water outlet hole 501 into high-pressure water vapor. The high-pressure water vapor will penetrate and clean the filter element assembly 4 from the inside to the outside, so that the sludge attached to the filter element assembly 4 can be removed more thoroughly and efficiently.

[0038] like Figure 8 and Fig. 9 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the atomizing nozzle 52 is provided with a limiting groove 502, and a portion of the filter element assembly 4 is adapted to the limiting groove 502. By designing that a portion of the filter element assembly 4 is adapted to the limiting groove 502, the stability and reliability of the atomizing nozzle 52 during use can be ensured, thereby improving the overall reliability of the sewage treatment system.

[0039] like Figure 8 and Fig. 9 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the atomizing nozzle 52 is provided with an adapting hole 503 and a compressed gas through hole 504, the compressed gas through hole 504 is arranged around the circumference of the adapting hole 503, the compressed gas through hole 504 is communicated with the installation cavity 401, and part of the pipe assembly 51 is adapted to the adapting hole 503. By adapting part of the pipe assembly 51 to the adapting hole 503, the compressed gas through hole 504 is arranged around the adapting hole 503, and the compressed gas through hole 504 is communicated with the installation cavity 401, the high-pressure compressed air entering the installation cavity 401 can be output from the compressed gas through hole 504, and the water output from the pipe assembly 51 is converted into high-pressure water vapor to clean the filter element assembly 4. The structural design of the part of the pipe assembly 51 being adapted to the adapting hole 503 ensures the close connection between the atomizing nozzle 52 and the pipe assembly 51, which not only improves the reliability of the equipment, but also ensures the continuity and stability of the conversion of water into high-pressure water vapor.

[0040] like Figure 8 and Fig. 9 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the number of water outlet holes 501 and atomizing nozzles 52 are both multiple, and the multiple water outlet holes 501 correspond to the multiple atomizing nozzles 52 one by one. By the one-to-one correspondence between the multiple water outlet holes 501 and the multiple atomizing nozzles 52, the multiple atomizing nozzles 52 work in parallel, forming high-pressure water vapor over a large area, which greatly improves the cleaning effect of the filter element assembly 4.

[0041] like Figure 8 and Fig. 9 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the mounting portion 42 includes a mounting portion body 421 and a limiting portion 422, the mounting portion body 421 is arranged on the filter element body 41, the limiting portion 422 is arranged on the mounting portion body 421, and part of the filter element cleaning structure 5 is adapted to the limiting portion 422. By arranging the limiting portion 422 on the mounting portion body 421, and part of the filter element cleaning structure 5 is adapted to be installed with the limiting portion 422, a stable connection between the filter element cleaning structure 5 and the mounting portion 42 is ensured, and shaking or displacement of the filter element cleaning structure 5 during operation is avoided, thereby improving the stability and reliability of the system.

[0042] like Fig.10 and Fig.11 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the stirring device 1 includes a barrel 11 and a stirrer 12, the barrel 11 is provided with a sewage stirring chamber 101, the stirrer 12 is arranged on the barrel 11, and part of the stirrer 12 extends into the sewage stirring chamber 101. The stirrer 12 partially extends into the sewage stirring chamber 101, so that the sewage is fully stirred in the sewage stirring chamber 101. When it is necessary to add additives to pre-treat the sewage, the stirring action of the stirrer 12 helps to accelerate the chemical reaction and biological degradation process, thereby improving the effect of sewage treatment.

[0043] like Fig.10 and Fig.11 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the stirring device 1 also includes a flocculant adding machine 13, the flocculant adding machine 13 is arranged on the cylinder 11, and the flocculant adding machine 13 is provided with a first additive outlet, and the first additive outlet is connected to the sewage stirring chamber 101. By providing the flocculant adding machine 13, the flocculant can be dissolved into a liquid flocculant in advance, so that after the fully dissolved flocculant is added to the sewage stirring chamber 101, it can be more quickly mixed with the sewage and react. The design of the connection between the first additive outlet and the sewage stirring chamber 101 ensures that the flocculant can be quickly added to the sewage, thereby improving the treatment efficiency.

[0044] like Fig.10 and Fig.11As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the stirring device 1 also includes a loosening agent adding machine 14, which is arranged on the cylinder 11, and the loosening agent adding machine 14 is provided with a second additive outlet, and the second additive outlet is connected to the sewage stirring chamber 101. Through the integrated design of the loosening agent adding machine 14 and the cylinder 11, the overall structure of the stirring device 1 is more compact. The second additive outlet of the loosening agent adding machine 14 is directly connected to the sewage stirring chamber 101, ensuring that the loosening agent can be quickly added to the sewage, thereby improving the sewage treatment effect.

[0045] like Figure 3 , Figure 4 and Figure 5 As shown, in addition to the features of the above-mentioned embodiment, the present embodiment further defines that: the filter tank body 3 includes a tank body 31 and a sludge discharge valve 32, the tank body 31 is provided with a sludge discharge port 304, the sludge discharge valve 32 is arranged on the tank body 31 and located at the sludge discharge port 304, and the sludge discharge valve 32 is used to control the opening of the sludge discharge port 304. By integrating the sludge discharge valve 32 on the tank body 31 and locating the sludge discharge valve 32 at the sludge discharge port 304, additional pipes and connectors are reduced, the system structure is simplified, and the sludge discharge process is made more direct and convenient, the operator can quickly control the discharge of sludge, and the convenience and efficiency of operation are improved. In addition, the sludge discharge valve 32 can be a butterfly valve, which can control the opening by rotating the valve stem, and is more easily combined with the automatic control system to realize the automatic control of sludge discharge.

[0046] like Figure 1 and Figure 2 As shown, in addition to the features of the above-mentioned embodiments, this embodiment is further defined as follows: it also includes a housing assembly 8, the housing assembly 8 is provided with an installation space 801 and a filter tank installation cavity 802, the high-pressure sewage pump 2 is arranged on the housing assembly 8 and is located in the installation space 801, and the filter tank 3 is arranged on the housing assembly 8 and is located in the filter tank installation cavity 802. The housing assembly 8 is provided with an installation space 801 and a filter tank installation cavity 802, and the high-pressure sewage pump 2 and the filter tank 3 are integrated in the internal space of the housing assembly 8, so that the overall structure of the sewage treatment system is more compact, and the occupied space of the overall equipment is reduced. The high-pressure sewage pump 2 and the filter tank 3 are respectively arranged at specific positions of the housing assembly 8, so that the optimized layout of the equipment is realized, and the equipment is easy to maintain.

[0047] In addition to the features of the above embodiment, the present embodiment is further defined as follows: a compressed gas supply system is further included, and the gas outlet of the compressed gas supply system is connected to the gas inlet 303. By connecting the gas outlet of the compressed gas supply system to the gas inlet 303, high-pressure compressed air can be introduced from the gas inlet 303 into the installation cavity 401, so that the high-pressure compressed air cooperates with the filter element cleaning structure 5, and then the filter element assembly 4 is cleaned.

[0048] In addition to the features of the above-mentioned embodiments, this embodiment further defines: it also includes a detection device and a circulation device, the detection device is arranged on the filter tank body 3, and the detection device is used to detect the water quality of the filtered sewage; the filter tank body 3 is provided with a water outlet 305, the water outlet 305 is connected to the accommodating chamber 301, the water inlet end of the circulation device is connected to the water outlet 305, and the water outlet end of the circulation device is connected to the stirring device 1. By setting up the detection device, the water quality of the filtered sewage can be detected to determine whether the filtered sewage meets the discharge standard. The water inlet end and the water outlet end of the circulation device are connected to the water outlet 305 and the stirring device 1 respectively. The setting of the circulation device allows the water that does not meet the discharge standard after detection by the detection device to be sent back to the stirring device 1 for treatment, further improving the automation of the sewage treatment system.

[0049] In addition to the features of the above-mentioned embodiment, the present embodiment further defines that: it also includes an automatic pressure relief valve, which is arranged on the filter tank body 3 and is connected to the accommodating chamber 301. After the high-pressure compressed air and the filter element cleaning structure 5 complete the cleaning of the filter element assembly 4, the pressure in the accommodating chamber 301 is too high, and the sludge discharge valve 32 cannot be opened directly to discharge the sludge. The automatic pressure relief valve can quickly release the pressure of the accommodating chamber 301 after the step of cleaning the filter element assembly 4 is completed, speeding up the next process, and ensuring the reliability and safety of the sewage treatment system.

[0050] In addition to the features of the above embodiment, the present embodiment is further defined as follows: a clean water supply system is further included, and the clean water supply system is used to supply clean water to the filter element cleaning structure 5. By using the clean water supply system to supply clean water to the filter element cleaning structure 5, it can be ensured that the filter element assembly 4 will not be contaminated again by impurities or pollutants during the cleaning process, thereby improving the cleaning efficiency and the service life of the filter element assembly 4.

[0051] Embodiment 2, as Fig.12As shown, the present embodiment discloses a sewage treatment method, comprising the following steps: S1, start the stirring device to fully mix the sewage in the sewage stirring chamber; S2, start the high-pressure sewage pump to transport the sewage in the sewage stirring chamber to the filter tank for filtration; S3, the sewage flows through the filter element assembly for filtration, and the filtered sewage flows through the detection device for detection; S4, monitors the thickness of the sludge cake in the filter tank, and when the sludge cake reaches a preset thickness, stops the high-pressure sewage pump; S5, starts the clean water supply system to supply water to the filter element cleaning structure, starts the compressed gas supply system, and cleans the filter element assembly; S6, after the filter element assembly is cleaned, closes the clean water supply system and the compressed gas supply system, starts the automatic pressure relief valve, and after the filter tank is fully depressurized, opens the sludge discharge valve to discharge the sludge.

[0052] The second aspect of the present application discloses a sludge treatment method, which fully mixes the sewage in the sewage stirring chamber by starting a stirring device, thereby ensuring the uniformity of the sewage in the subsequent treatment process. The sewage is quickly sent into the filter tank for filtration by a high-pressure sewage pump. Filtering through the filter element assembly can effectively remove pollutants such as suspended matter and impurities in the sewage, so that the filtered sewage meets the discharge standard. When the sludge cake reaches a preset thickness, the filtration step is stopped and the accumulated sludge is cleaned to ensure the sustainable use of the filter element assembly. Through the cooperation of the clean water supply system and the compressed gas supply system, the filter element assembly is cleaned, and the sludge attached to the filter element assembly is effectively and efficiently removed, further improving the efficient conduct of the sewage treatment process. The application of the automatic pressure relief valve makes the pressure relief process of the filter tank safer and more convenient. By accurately controlling the operation of the stirring device, the high-pressure sewage pump, the clean water supply system and the compressed gas supply system, the automation degree of the sewage treatment process is improved. The filtered sewage is detected by the detection device to ensure that the treated water meets the discharge standard.

[0053] In addition to the features of the above-mentioned embodiments, the present embodiment further defines: in step S1, the specific steps of starting the stirring device to fully mix the sewage in the sewage stirring chamber are as follows: S11, when the water level in the sewage stirring chamber reaches the preset water level line, start the agitator to stir and mix the sewage; S12, start the flocculant adding machine, and after the flocculant is fully dissolved, add the dissolved liquid flocculant into the sewage stirring chamber; S13, start the loosening agent adding machine, and add the loosening agent into the sewage stirring chamber; S14, keep the agitator turned on to mix the flocculant and loosening agent added to the sewage stirring chamber with the sewage evenly.

[0054] By starting the stirring device to fully mix the sewage, flocculant and loosening agent in the sewage stirring chamber, the sewage treatment efficiency can be further improved. By fully dissolving the flocculant and adding it to the sewage stirring chamber, it helps to better remove fine suspended particles and colloidal substances in the sewage. By starting the loosening agent adding machine and adding loosening agent to the sewage stirring chamber, the sewage treatment effect can be further improved. The loosening agent can help improve the sedimentation performance and dewatering performance of the sludge, thereby optimizing the entire sewage treatment process. Continuously starting the agitator until the added flocculant and loosening agent are evenly mixed with the sewage can not only help improve the treatment effect, but also avoid problems caused by excessive or low concentrations of local treatment agents.

[0055] In addition to the features of the above-mentioned embodiments, this embodiment further defines that: in step S3, the filtered sewage flows through a detection device for detection, and the sewage that meets the qualified discharge standards is discharged or recycled, and the sewage that does not meet the qualified discharge standards is returned to the stirring device through a circulation device to continue mixing and stirring, and then the next filtering process is carried out. The filtered sewage is detected in real time by the detection device to ensure that only sewage that meets the qualified discharge standards will be discharged or recycled, thereby protecting the environment and avoiding pollution. For sewage that does not meet the discharge standards, it is returned to the stirring device through the circulation device for re-treatment, which improves the automation and efficiency of the treatment process. Automated circulation processing reduces the need for manual monitoring and operation, thereby reducing the labor cost of sewage treatment.

[0056] In addition to the features of the above-mentioned embodiments, this embodiment further defines: in step S5, the specific steps for cleaning the filter element assembly are as follows: S51, start the clean water supply system to supply clean water to the filter element cleaning structure; S52, start the compressed gas supply system to deliver high-pressure compressed air to the installation cavity of the filter element assembly; S53, the water and high-pressure compressed air output by the filter element cleaning structure form high-pressure water vapor in the accommodating cavity under the action of the atomizing nozzle, and are sprayed toward the inner wall of the accommodating cavity, so that the sludge falls off the filter element assembly, thereby cleaning the filter element assembly.

[0057] By starting the clean water supply system and the compressed gas supply system, clean water and high-pressure compressed air are supplied at the same time, and high-pressure water vapor is formed. The high-pressure water vapor is sprayed from the inside to the outside in the filter element assembly, which can more effectively remove the sludge from the filter element assembly, greatly improving the cleaning efficiency.

[0058] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sewage treatment system, characterized in that: include: A stirring device (1), the stirring device (1) is used to receive sewage sent from the workshop; A high-pressure sewage pump (2), wherein a water inlet end of the high-pressure sewage pump (2) is connected to the stirring device (1); A filter tank body (3), the filter tank body (3) being provided with a receiving chamber (301), the receiving chamber (301) being provided with a sewage inlet (302) and an air inlet (303), the water outlet of the high-pressure sewage pump (2) being in communication with the sewage inlet (302), and the air inlet (303) being used for communicating with a compressed air supply system; A filter element assembly (4), the filter element assembly (4) being arranged on the filter tank body (3) and located in the accommodating cavity (301), the filter element assembly (4) being provided with an installation cavity (401), the installation cavity (401) being in communication with the air inlet (303); A main control system (6), the main control system (6) comprising a control component and a manipulation component, the stirring device (1), the high-pressure sewage pump (2) and the manipulation component being electrically connected to the control component respectively; A sludge collection barrel (7), wherein the filter tank body (3) is provided with a sludge discharge port (304), and the sludge collection barrel (7) is provided with an opening, wherein the opening is arranged opposite to the sludge discharge port (304).

2. The sewage treatment system according to claim 1, characterized in that: It also comprises a filter element cleaning structure (5), the filter element cleaning structure (5) being arranged on the filter element assembly (4), a portion of the filter element cleaning structure (5) being located in the installation cavity (401), the filter element cleaning structure (5) being provided with a water outlet hole (501), and the filter element cleaning structure (5) being used to clean sludge attached to the filter element assembly (4).

3. The sewage treatment system according to claim 2, characterized in that: The filter element assembly (4) comprises a filter element body (41) and a mounting portion (42); the filter element body (41) is arranged on the filter tank body (3); the filter element body (41) is provided with a filter cavity (402); the mounting portion (42) is arranged on the filter element body (41) and is located in the filter cavity (402); the mounting portion (42) is provided with the mounting cavity (401); the filter element cleaning structure (5) comprises a pipe assembly (51) and an atomizing nozzle (52); the pipe assembly The assembly (51) is arranged on the mounting portion (42), a portion of the pipe assembly (51) is located in the mounting cavity (401), the pipe assembly (51) is provided with the water outlet hole (501), and the portion of the pipe assembly (51) provided with the water outlet hole (501) extends out of the mounting cavity (401), and the atomizing nozzle (52) is arranged on the filter element assembly (4) and the pipe assembly (51), and the atomizing nozzle (52) is located at the water outlet hole (501).

4. The sewage treatment system according to claim 3, characterized in that: The pipe assembly (51) comprises a water pipe (511) and a water outlet (512); the water pipe (511) is arranged on the filter element assembly (4) and is located in the installation cavity (401); one end of the water outlet (512) is arranged on the water pipe (511); one end of the water outlet (512) away from the water pipe (511) extends out of the installation cavity (401); one end of the water outlet (512) away from the water pipe (511) is provided with the water outlet hole (501); the water outlet hole (501) is communicated with the water pipe (511); and the atomizing nozzle (52) is sleeved on the water outlet (512); And / or the atomizing nozzle (52) is provided with a limiting groove (502), and a portion of the filter element assembly (4) is adapted to fit the limiting groove (502); and / or the atomizing nozzle (52) is provided with an adapting hole (503) and a compressed gas through hole (504), the compressed gas through hole (504) is arranged around the circumference of the adapting hole (503), the compressed gas through hole (504) is communicated with the installation cavity (401), and part of the pipe assembly (51) is adapted to the adapting hole (503); and / or the number of the water outlet holes (501) and the number of the atomizing nozzles (52) are both multiple, and the multiple water outlet holes (501) correspond one-to-one to the multiple atomizing nozzles (52); And / or the mounting portion (42) comprises a mounting portion body (421) and a limiting portion (422), the mounting portion body (421) being arranged on the filter element body (41), the limiting portion (422) being arranged on the mounting portion body (421), and a portion of the filter element cleaning structure (5) being adapted to the limiting portion (422).

5. The sewage treatment system according to claim 1, characterized in that: The stirring device (1) comprises a cylinder (11) and a stirrer (12); the cylinder (11) is provided with a sewage stirring chamber (101); the stirrer (12) is arranged on the cylinder (11); a portion of the stirrer (12) extends into the sewage stirring chamber (101).

6. The sewage treatment system according to claim 5, characterized in that: The stirring device (1) further comprises a flocculant adding machine (13), wherein the flocculant adding machine (13) is arranged on the cylinder (11), and the flocculant adding machine (13) is provided with a first additive outlet, wherein the first additive outlet is in communication with the sewage stirring chamber (101); And / or the stirring device (1) further comprises a loosening agent adding machine (14), the loosening agent adding machine (14) being arranged on the cylinder (11), the loosening agent adding machine (14) being provided with a second additive outlet, the second additive outlet being in communication with the sewage stirring chamber (101).

7. The sewage treatment system according to claim 1, characterized in that: The filtering tank (3) comprises a tank body (31) and a sludge discharge valve (32); the tank body (31) is provided with a sludge discharge port (304); the sludge discharge valve (32) is arranged on the tank body (31) and located at the sludge discharge port (304); the sludge discharge valve (32) is used to control the opening of the sludge discharge port (304); and / or further comprising a housing assembly (8), the housing assembly (8) being provided with an installation space (801) and a filter tank installation cavity (802), the high-pressure sewage pump (2) being arranged on the housing assembly (8) and being located in the installation space (801), and the filter tank (3) being arranged on the housing assembly (8) and being located in the filter tank installation cavity (802); and / or further comprising a compressed gas supply system, wherein a gas outlet of the compressed gas supply system is in communication with the gas inlet (303); And / or further comprising a detection device and a circulation device, wherein the detection device is arranged on the filtering tank body (3), and the detection device is used to detect the quality of the filtered sewage; the filtering tank body (3) is provided with a water outlet (305), the water outlet (305) is communicated with the accommodating chamber (301), the water inlet end of the circulation device is communicated with the water outlet (305), and the water outlet end of the circulation device is communicated with the stirring device (1); and / or further comprising an automatic pressure relief valve, the automatic pressure relief valve being arranged on the filter tank body (3), the automatic pressure relief valve being in communication with the accommodating chamber (301); And / or also includes a clean water supply system, wherein the clean water supply system is used to supply clean water to the filter element cleaning structure (5).

8. A sewage treatment method, used in the sewage treatment system according to any one of claims 2 to 4, comprising the following steps: S1. Start the stirring device to fully mix the sewage in the sewage stirring chamber; S2, start the high-pressure sewage pump to transport the sewage in the sewage mixing chamber to the filter tank for filtration; S3, the sewage flows through the filter element assembly for filtration, and the filtered sewage flows through the detection device for detection; S4, monitor the thickness of the sludge cake in the filter tank, and stop the high-pressure sewage pump when the sludge cake reaches a preset thickness; S5, start the clean water supply system to supply water to the filter element cleaning structure, start the compressed gas supply system to clean the filter element assembly; S6. After the filter element assembly is cleaned, close the clean water supply system and the compressed gas supply system, start the automatic pressure relief valve, and after the filter tank is fully depressurized, open the sludge discharge valve to discharge the sludge.

9. The sewage treatment method according to claim 8, characterized in that: In step S1, the specific steps of starting the stirring device to fully mix the sewage in the sewage stirring chamber are as follows: S11. When the water level in the sewage mixing chamber reaches a preset water level, the agitator is started to mix the sewage; S12, starting the flocculant adding machine, and after the flocculant is fully dissolved, adding the dissolved liquid flocculant into the sewage stirring chamber; S13, start the loosening agent adding machine to add loosening agent into the sewage mixing chamber; S14. Keep the agitator on to evenly mix the flocculant and loosening agent added into the sewage mixing chamber with the sewage.

10. The sewage treatment method according to claim 8, characterized in that: In step S5, the specific steps of cleaning the filter element assembly are as follows: S51, start the clean water supply system to supply clean water to the filter element cleaning structure; S52, starting the compressed gas supply system to deliver high-pressure compressed air into the installation cavity of the filter element assembly; S53. The water outputted by the filter element cleaning structure and the high-pressure compressed air form high-pressure water vapor in the accommodating chamber under the action of the atomizing nozzle, and spray toward the inner wall of the accommodating chamber, so that the sludge falls off the filter element assembly, thereby cleaning the filter element assembly.

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