Sewage treatment method and sewage treatment system

Abstract

The present application relates to a sewage treatment method and a sewage treatment system, which includes a primary treatment device, a secondary treatment device, and a tertiary treatment device arranged in sequence; a first delivery pipe and a first siphon are connected between the primary treatment device and the secondary treatment device, and a second delivery pipe and a second siphon are connected between the secondary treatment device and the tertiary treatment device; wherein the first delivery pipe and the second delivery pipe are both provided with a one-way valve, the secondary treatment device is provided with a first temporary storage area, and the tertiary treatment device is provided with a second temporary storage area; the tertiary treatment device is connected to a discharge pipe, and the discharge pipe is provided with a water quality monitoring component and a discharge valve in sequence; when the water quality data obtained by detection meets the safe discharge standard, the discharge valve on the discharge pipe is opened to discharge the water that meets the safe discharge standard. There is no need to use high-energy-consuming and high-noise equipment such as water pumps, thereby reducing sewage treatment costs and reducing the impact and harm of noise on the lives of people and nearby residents.

Description

Technical Field

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

[0002] Sewage treatment plants are industrial equipment that effectively treat urban domestic sewage, industrial wastewater, and other wastewater, preventing it and pollutants from flowing directly into waterways. These plants are crucial for improving the ecological environment, enhancing urban quality, and promoting economic development. Traditional underground sewage treatment equipment primarily treats domestic sewage and similar industrial organic wastewater to meet water quality requirements for reuse, enabling wastewater to be reused as a resource. However, these traditional sewage treatment plants are simple, with simplistic treatment processes, and are unable to fully remove pollutants from wastewater.

[0003] Traditional sewage treatment systems typically require a large amount of energy to maintain operation. For example, water pumps are usually required to transport sewage to various levels of equipment. Over the years, not only is there a serious energy loss and repeated maintenance required, which increases sewage treatment costs, but the noise generated during use also endangers personnel and affects the lives of nearby residents. Summary of the Invention

[0004] In order to solve the above problems, the present application provides a sewage treatment method and a sewage treatment system.

[0005] In the first aspect, the above-mentioned invention object of the present application is achieved through the following technical solutions:

[0006] A sewage treatment system comprises a primary treatment device, a secondary treatment device and a tertiary treatment device arranged in sequence;

[0007] A first delivery pipe and a first siphon are connected between the primary treatment device and the secondary treatment device, and a second delivery pipe and a second siphon are connected between the secondary treatment device and the tertiary treatment device; wherein the first delivery pipe and the second delivery pipe are both provided with a one-way valve, the secondary treatment device is provided with a first temporary storage area, and the tertiary treatment device is provided with a second temporary storage area;

[0008] When the first siphon is in operation, the one-way valve on the first delivery pipe is closed, the suction end of the first siphon is in the liquid filtered by the primary treatment device, and the delivery end of the first siphon is in the liquid in the first temporary storage area. The suction end of the first siphon is located higher than the delivery end of the first siphon, so that the suction end of the first siphon generates negative pressure after the liquid level in the first temporary storage area drops, and can suck the liquid filtered by the primary treatment device into the first temporary storage area of the secondary treatment device for temporary storage, so as to separate impurities in the secondary treatment device.

[0009] When the second siphon is in operation, the one-way valve on the second delivery pipe is closed, the suction end of the second siphon is in the liquid after impurities are separated by the secondary treatment device, and the delivery end of the second siphon is in the liquid in the second temporary storage area. The suction end of the second siphon is located higher than the delivery end of the second siphon, so that the suction end of the second siphon generates negative pressure after the level of the liquid pre-treated by the tertiary treatment device drops, and can suck the liquid after impurities are separated by the secondary treatment device into the second temporary storage area for temporary storage so that the tertiary treatment device can be disinfected.

[0010] The tertiary treatment device is connected to a discharge pipe, on which a water quality monitoring component and a discharge valve are sequentially arranged; wherein, when the water quality data detected by the water quality monitoring component reaches the safe discharge standard, the discharge valve on the discharge pipe opens to discharge the water that meets the safe discharge standard.

[0011] By adopting the above technical solution, when the liquid filtered by the primary treatment device is transported to the secondary treatment device, it can be automatically transported through the first delivery pipe or automatically sucked up by the first siphon; and when the liquid after impurity separation in the secondary treatment device is transported to the tertiary treatment device, it can be automatically transported through the second delivery pipe or automatically sucked up by the second siphon, without the need to use high-energy-consuming and high-noise equipment such as water pumps, thereby reducing the cost of sewage treatment and reducing the impact and harm of noise on the lives of people and nearby residents; at the same time, since the first siphon and the second siphon are based on the siphon effect for transportation, the first siphon and the second siphon can be used to automatically transport the liquid, reducing equipment loss and equipment cost, and eliminating the need for repeated maintenance, further reducing the cost of sewage treatment, and can further achieve stable and accurate transportation to ensure the supply and demand balance of the system.

[0012] In a preferred example, the present application may be further configured as follows: the primary treatment device includes a box;

[0013] The box body is provided with a protrusion and a partition, and a coarse grid is connected between the partition and the protrusion; the interior of the box body is divided by the protrusion, the partition and the coarse grid to form a collection area and a filtration area, the bottom surface of the collection area is lower than the top surface of the protrusion, and the filtration area is above the top surface of the protrusion. The box body is also connected to a water inlet pipe for conveying sewage, and the water inlet pipe is in communication with the collection area;

[0014] A fine grid is provided in the collection area, and the fine grid is respectively connected to the partition plate and the inner wall of the box to divide the filtration area into a primary filtration area and a secondary filtration area, and the primary filtration area is below the fine grid, and the secondary filtration area is above the fine grid;

[0015] Wherein, both ends of the first delivery pipe are connected to the secondary filtration area and the first temporary storage area respectively, and the first siphon pipe is respectively arranged in the secondary filtration area and the first temporary storage area.

[0016] By adopting the above technical solution, partitions and coarse grids are set in the box body, and the coarse grids and the partitions are connected to separate the inside of the box body into a collection area and a filtration area, and the filtration area is above the top surface of the protrusion. At this time, since the bottom of the filtration area is higher than the collection area, under the action of gravity, the impurities in the sewage can be preliminarily precipitated, and since the collection area and the filtration area are separated by partitions and coarse grids, the liquid entering the filtration area is further filtered and isolated by the coarse grids. At the same time, fine grids are installed in the filtration area, and the fine grids are connected to the partitions and the wall of the box body, which can divide the filtration area into a primary filtration area and a filter area above the primary filtration area. The secondary filtration area receives the liquid filtered by the coarse grid through the primary filtration area, and receives the liquid filtered by the fine grid through the secondary filtration area, thereby realizing multi-level real-time filtration effect of the raw sewage through the box, without the need for multiple devices to be used in combination, reducing equipment cost and floor space. At the same time, under the action of gravity, impurities can continue to settle downward, thereby ensuring that the liquid in the secondary filtration area is the optimally filtered liquid (that is, the cleanest liquid in the box), so that it can be transported to the subsequent process through the first siphon or the first delivery pipe, reducing the processing difficulty of the subsequent process and reducing the subsequent processing steps, thereby greatly improving the sewage treatment efficiency and treatment effect.

[0017] In a preferred embodiment of the present application, the partition plate may be further configured as follows: the partition plate includes an inclined section and a vertical section sequentially connected from top to bottom, the vertical section is arranged parallel to an opposite surface of the box body, the vertical section of the partition plate is connected to the protrusion via the fine grid, and the inclined section is arranged to be gradually inclined from top to bottom along the direction of the collection area;

[0018] The coarse grid is arranged in an inclined manner, and the coarse grid is gradually inclined from top to bottom along the direction of the primary filtration area;

[0019] The fine grid is arranged obliquely, and the fine grid is gradually inclined from left to right along the direction of the primary filtration area;

[0020] The top surface of the protrusion is inclined, and the top surface of the protrusion is gradually inclined downward from right to left;

[0021] A filter layer is further provided above the fine grid, with a distance between the filter layer and the fine grid, and the filter layer is located below the first delivery pipe and the first siphon pipe, wherein the filter layer includes filter cloth.

[0022] By adopting the above technical solution, since the partition includes an inclined section and a vertical section connected in sequence from top to bottom, and the vertical section is connected to the protrusion through a fine grid, the interior of the box is divided into a collection area and a filtration area, and the inclined section is gradually inclined from top to bottom in the direction of the collection area to increase the accommodating space and the collection opening of the collection area, thereby facilitating the collection and sedimentation of sewage, preventing impurities and pollutants from entering the filtration area, and facilitating the salvage and cleaning of floating objects; in addition, by arranging the coarse grid at an angle, and the coarse grid is gradually inclined from top to bottom in the direction of the primary filtration area, avoiding When impurities and pollutants enter the collection area from the water inlet pipe, they are not easy to enter the primary filtration area when they settle down under the action of gravity, so that the sewage can be well filtered. Moreover, due to the inclined setting of the coarse grid, the filtration in the inclined direction is achieved, which is better than the filtration in the horizontal and vertical directions during use, and the filtration effect is further improved. And by setting the fine grid at an angle, and the fine grid is gradually inclined from left to right along the direction of the primary filtration area, due to the inclined setting of the coarse grid, the filtration in the inclined direction is achieved, which is better than the filtration in the horizontal and vertical directions during use, and the impurities are avoided from being transported by the first conveying pipe or the first siphon. The filter element is sucked into the secondary treatment device by the pipe, thereby further improving the filtering effect; and by tilting the top surface of the protrusion, the top surface of the protrusion is gradually tilted downward from right to left. Under the action of gravity, the impurities in the primary filtration area and the secondary filtration area can be accurately deposited on the inclined top surface of the protrusion when they settle downward, and slide into the collection area through the inclined top surface of the protrusion, thereby achieving a real-time filtration effect and ensuring that impurities and pollutants can be centrally processed and collected, thereby further improving the sewage filtration and treatment effect; further, by arranging a filter layer above the fine grid, with a spacing between the filter layer and the fine grid, the filter The layer includes filter cloth, which can effectively filter the sewage. When the water inlet pipe transports the sewage into the box, the sewage first enters the collection area. When the sewage level reaches the top surface of the convex block, it enters the primary filtration area after being filtered through the coarse grid. When the sewage level in the primary filtration area reaches the fine grid, it reaches the bottom of the filter layer after being filtered through the fine grid. After passing through the filter layer, it enters the secondary filtration area, so that it can be transported by the first delivery pipe and sucked into the secondary treatment device by the first siphon for treatment. At the same time, during the working process, impurities and pollutants can be continuously precipitated in the collection area, so as to facilitate centralized collection and treatment and achieve multi-level filtration effects.

[0023] In a preferred embodiment, the present application may be further configured as follows: the secondary treatment device is further provided with a biological filtration area, a membrane filtration area, and a first output area in sequence; the first temporary storage area is connected to the biological filtration area, the biological filtration area is connected to the membrane filtration area, and the membrane filtration area is connected to the first output area; the biological filtration area is used to degrade organic matter in the liquid, and the membrane filtration area is used to separate impurities in the liquid;

[0024] The three-stage treatment device is further provided with an activated carbon area, a disinfection area, and a second output area in sequence. The second temporary storage area is connected to the activated carbon area, the activated carbon area is connected to the disinfection area, and the disinfection area is connected to the second output area. The activated carbon area is used to remove organic matter and heavy metals in the liquid, and the disinfection area is used to disinfect the liquid.

[0025] Wherein, two ends of the second delivery pipe are respectively connected to the first area to be output and the second temporary storage area, and two ends of the second siphon pipe are respectively arranged in the first area to be output and the second temporary storage area.

[0026] By adopting the above technical solution, by sequentially arranging a biological filtration zone, a membrane filtration zone and a first area to be output in the secondary treatment device, and the membrane filtration zone is connected to the first area to be output, it is possible to sequentially process the liquid output through the first temporary storage area, and after reaching the first area to be output, it can be transported by the second transport pipe or sucked by the second siphon pipe to the tertiary treatment device for treatment. By sequentially arranging an activated carbon zone, a disinfection zone and a second area to be output in the tertiary treatment device, and the second temporary storage zone is connected to the activated carbon zone, it is possible to sequentially process the liquid output through the second temporary storage area, and after reaching the second area to be output, it can be discharged by the discharge pipe or refluxed by the reflux pipe for secondary treatment, thereby achieving stable and efficient treatment of sewage, reducing floor space, and lowering treatment costs.

[0027] In a preferred example, the present application may be further configured as follows: a first liquid level monitor is provided in the primary treatment device, and when the liquid in the primary treatment device does not reach the first liquid level, the one-way valve on the first delivery pipe is closed, and the first siphon pipe does not operate;

[0028] A second liquid level monitor is provided in the secondary treatment device. When the liquid in the primary treatment device reaches a first liquid level and the liquid in the secondary treatment device does not reach a second liquid level, the one-way valve on the first delivery pipe opens and the first siphon pipe does not work.

[0029] When the liquid in the primary treatment device reaches a first liquid level and the liquid in the secondary treatment device reaches a second liquid level, the one-way valve on the first delivery pipe is closed and the first siphon pipe is operated;

[0030] The suction end of the first siphon tube is located at a position higher than or equal to the first liquid level, and the delivery end of the first siphon tube is located at a position higher than or equal to the second liquid level.

[0031] By adopting the above technical solution, the liquid delivery work of the first delivery pipe and the first siphon pipe can be accurately controlled according to the liquid level conditions in the primary treatment device and the secondary treatment device. When the liquid level in the primary treatment device reaches the first liquid level, the one-way valve on the first delivery pipe is controlled to open, so that the liquid filtered by the primary treatment device is quickly delivered to the secondary treatment device. When the liquid in the primary treatment device and the secondary treatment device reaches the second liquid level, the one-way valve is closed, so that the first siphon pipe generates negative pressure as the liquid level in the secondary treatment device drops and absorbs it into the secondary treatment device, ensuring that the liquid in the primary treatment device is stably delivered to the secondary treatment device for treatment as needed, and achieving a precise supply and demand balance effect.

[0032] In a preferred example, the present application may be further configured as follows: when the liquid in the secondary treatment device does not reach the third liquid level, the one-way valve on the second delivery pipe is closed, and the second siphon pipe does not work;

[0033] A third liquid level monitor is provided in the tertiary treatment device. When the liquid in the secondary treatment device reaches the third liquid level and the liquid in the tertiary treatment device has not reached the fourth liquid level, the one-way valve on the second delivery pipe is opened and the second siphon pipe is not operated.

[0034] When the liquid in the secondary treatment device reaches a third liquid level and the liquid in the tertiary treatment device reaches a fourth liquid level, the one-way valve on the second delivery pipe is closed and the second siphon pipe is operated;

[0035] The suction end of the second siphon tube is located at a position higher than or equal to the third liquid level, and the suction end of the second siphon tube is located at a position higher than or equal to the fourth liquid level.

[0036] By adopting the above technical solution, the liquid delivery work of the second delivery pipe and the second siphon pipe can be accurately controlled according to the liquid level conditions in the secondary treatment device and the tertiary treatment device. When the liquid level in the secondary treatment device reaches the third liquid level, the one-way valve on the second delivery pipe is controlled to open, so that the liquid filtered by the secondary treatment device is quickly delivered to the tertiary treatment device. When the liquid in the secondary treatment device and the tertiary treatment device reaches the fourth liquid level, the one-way valve is closed, so that the second siphon pipe generates negative pressure as the liquid level in the tertiary treatment device drops and is sucked into the tertiary treatment device, thereby ensuring that the liquid in the secondary treatment device is stably delivered to the tertiary treatment device for treatment as needed, and achieving a precise supply and demand balance effect.

[0037] In a preferred example, the present application may be further configured as follows: a return pipe is connected between the discharge pipe and the first delivery pipe and the second delivery pipe;

[0038] The return pipe is provided with a third one-way valve and a fourth one-way valve. The third one-way valve is provided between the discharge pipe and the first delivery pipe, and the fourth one-way valve is provided between the discharge pipe and the second delivery pipe.

[0039] By adopting the above technical solution and setting up a reflux pipe, when it is monitored that the liquid does not meet the safety discharge standards, the liquid is refluxed through the reflux pipe according to the water quality monitoring results to perform secondary treatment on the liquid, thereby ensuring that the discharged liquid is within the provisions of the safety discharge standards.

[0040] In a preferred example, the present application may be further configured as follows: further comprising a control device, the control device comprising a first control module, a second control module, and a third control module;

[0041] The primary treatment device is connected to a water inlet pipe, the water inlet pipe is provided with a water inlet valve, and the first delivery pipe and the first siphon are provided with a first flow monitor; the first control module is used to determine a first target opening of the water inlet valve based on a flow monitoring result of the first flow monitor and a liquid level monitoring result of the first liquid level monitor, and control the water inlet valve to operate at the first target opening;

[0042] The second delivery pipe and the second siphon pipe are provided with a second flow monitor; the second control module is used to determine a second target opening of the one-way valve on the first delivery pipe based on the flow monitoring result of the second flow monitor and the liquid level monitoring result of the second liquid level monitor, and control the one-way valve on the first delivery pipe to operate at the second target opening;

[0043] The discharge pipe is provided with a third flow monitor, and the third flow monitor and the water quality monitoring component are arranged in sequence. The third control module is used to determine the third target opening of the one-way valve on the second delivery pipe according to the flow monitoring result of the third flow monitor and the liquid level monitoring result of the third liquid level monitor, and control the one-way valve on the second delivery pipe to operate at the third target opening.

[0044] By adopting the above technical solution, the first control module, the second control module and the third control module can achieve precise control of the water inlet valve and the one-way valves on the first delivery pipe and the second delivery pipe, thereby ensuring the effect of precise delivery of liquid.

[0045] In a preferred example, the present application can be further configured as follows: the first control module, the second control module and the third control module each include a first determination unit, a second determination unit, a third determination unit, a calculation unit and a control unit,

[0046] The first determining unit is used to determine a first membership value corresponding to the liquid level monitoring result and a second membership value corresponding to the flow monitoring result;

[0047] The second determining unit is used to obtain a current liquid level error and a liquid level change rate, and determine a target fuzzy rule based on the current liquid level error and the liquid level change rate;

[0048] The third determining unit is configured to determine the membership distribution corresponding to the first membership value and the second membership value according to the target fuzzy rule;

[0049] The calculation unit is used to calculate the output value corresponding to the membership distribution according to a preset algorithm;

[0050] The control unit is used to use the output value as the corresponding first target opening, second target opening or third target opening, so as to control the operation of the water inlet valve, the one-way valve on the first delivery pipe or the one-way valve on the second delivery pipe according to the first target opening, the second target opening or the third target opening.

[0051] By adopting the above technical solution,

[0052] In the second aspect, the above-mentioned invention object of this application is achieved through the following technical solutions:

[0053] A sewage treatment method comprises the following steps:

[0054] A primary treatment device, a secondary treatment device, and a tertiary treatment device are sequentially arranged; wherein a first delivery pipe and a first siphon are connected between the primary treatment device and the secondary treatment device, a second delivery pipe and a second siphon are connected between the secondary treatment device and the tertiary treatment device, a one-way valve is provided on each of the first delivery pipe and the second delivery pipe, the secondary treatment device is provided with a first temporary storage area, the tertiary treatment device is provided with a second temporary storage area, the tertiary treatment device is connected to a discharge pipe, and a water quality monitoring component and a discharge valve are sequentially provided on the discharge pipe;

[0055] When the first siphon pipe is in operation, the one-way valve on the first delivery pipe is controlled to be closed, the suction end of the first siphon pipe is in the liquid filtered by the primary treatment device, and the delivery end of the first siphon pipe is in the liquid in the first temporary storage area. The suction end of the first siphon pipe is located higher than the delivery end of the first siphon pipe, so that the suction end of the first siphon pipe generates negative pressure after the liquid level in the first temporary storage area drops, and can suck the liquid filtered by the primary treatment device into the first temporary storage area of the secondary treatment device for temporary storage, so as to separate impurities in the secondary treatment device.

[0056] When the second siphon is in operation, the one-way valve on the second delivery pipe is controlled to be closed, the suction end of the second siphon is located in the liquid after impurities have been separated by the secondary treatment device, and the delivery end of the second siphon is located in the liquid in the second temporary storage area. The suction end of the second siphon is located higher than the delivery end of the second siphon, so that the suction end of the second siphon generates negative pressure after the level of the liquid pre-treated by the tertiary treatment device drops, and can suck the liquid after impurities have been separated by the secondary treatment device into the second temporary storage area for temporary storage, so as to facilitate disinfection of the tertiary treatment device.

[0057] When the water quality data detected by the water quality monitoring component reaches the safe discharge standard, the discharge valve on the discharge pipe is controlled to open to discharge the water that reaches the safe discharge standard.

[0058] By adopting the above technical solution, partitions and coarse grids are set in the box body, and the coarse grids and the partitions are connected to separate the inside of the box body into a collection area and a filtration area, and the filtration area is above the top surface of the protrusion. At this time, since the bottom of the filtration area is higher than the collection area, under the action of gravity, the impurities in the sewage can be preliminarily precipitated, and since the collection area and the filtration area are separated by partitions and coarse grids, the liquid entering the filtration area is further filtered and isolated by the coarse grids. At the same time, fine grids are installed in the filtration area, and the fine grids are connected to the partitions and the wall of the box body, which can divide the filtration area into a primary filtration area and a filter area above the primary filtration area. The secondary filtration area receives the liquid filtered by the coarse grid through the primary filtration area, and receives the liquid filtered by the fine grid through the secondary filtration area, thereby realizing multi-level real-time filtration effect of the raw sewage through the box, without the need for multiple devices to be used in combination, reducing equipment cost and floor space. At the same time, under the action of gravity, impurities can continue to settle downward, thereby ensuring that the liquid in the secondary filtration area is the optimally filtered liquid (that is, the cleanest liquid in the box), so that it can be transported to the subsequent process through the first siphon or the first delivery pipe, reducing the processing difficulty of the subsequent process and reducing the subsequent processing steps, thereby greatly improving the sewage treatment efficiency and treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 2 is a working principle diagram of the sewage treatment system of this embodiment.

[0060] Figure 2 It is a simplified structural diagram of the primary treatment device in the sewage treatment system of this embodiment.

[0061] Figure 3 It is a schematic diagram of the working principle of the primary processing device of this embodiment.

[0062] Figure 4This is a working principle diagram of the first delivery pipe and the second delivery pipe of the sewage treatment system of this embodiment.

[0063] Figure 5 This is a working principle diagram of the return pipe in the sewage treatment system of this embodiment.

[0064] Figure 6 This is another schematic diagram of the working principle of the return pipe in the sewage treatment system of this embodiment.

[0065] Figure numbers: 1. Primary treatment device, 11. First conveying pipe, 12. First siphon, 13. Bump, 14. Partition, 141. Inclined section, 142. Vertical section, 15. Coarse grid, 16. Fine grid, 17. Collection area, 18. Filtration area, 181. Primary filtration area, 182. Secondary filtration area, 19. Filtration layer, 101. Water inlet pipe, 2. Secondary treatment device, 21. Second conveying pipe, 22. Second siphon, 23. First temporary storage area, 24. Biological filtration area, 25. Membrane filtration area, 26. First output area, 3. Tertiary treatment device, 31. Discharge pipe, 32. Second temporary storage area, 33. Activated carbon area, 34. Disinfection area, 35. Second output area, 36. Reflux pipe. DETAILED DESCRIPTION

[0066] The present application is further described in detail below with reference to the accompanying drawings.

[0067] In one embodiment, if Figure 1-6 As shown, the present application discloses a sewage treatment system, comprising a primary treatment device 1, a secondary treatment device 2 and a tertiary treatment device 3 arranged in sequence;

[0068] A first delivery pipe 11 and a first siphon pipe 12 are connected between the primary treatment device 1 and the secondary treatment device 2, and a second delivery pipe 21 and a second siphon pipe 22 are connected between the secondary treatment device 2 and the tertiary treatment device 3; wherein, each of the first delivery pipe 11 and the second delivery pipe 21 is provided with a one-way valve, the secondary treatment device 2 is provided with a first temporary storage area 23, and the tertiary treatment device 3 is provided with a second temporary storage area 32;

[0069] When the first siphon tube 12 is working, the one-way valve on the first delivery pipe 11 is closed, the suction end of the first siphon tube 12 is in the liquid filtered by the primary treatment device 1, and the delivery end of the first siphon tube 12 is in the liquid in the first temporary storage area 23. The suction end of the first siphon tube 12 is located higher than the delivery end of the first siphon tube 12, so that the suction end of the first siphon tube 12 generates negative pressure after the liquid level in the first temporary storage area 23 drops, and can suck the liquid filtered by the primary treatment device 1 into the first temporary storage area 23 of the secondary treatment device 2 for temporary storage, so as to separate impurities in the secondary treatment device 2.

[0070] When the second siphon 22 is working, the one-way valve on the second delivery pipe 21 is closed, the suction end of the second siphon 22 is in the liquid after the impurities are separated by the secondary treatment device 2, and the delivery end of the second siphon 22 is in the liquid in the second temporary storage area 32. The suction end of the second siphon 22 is located higher than the delivery end of the second siphon 22, so that the suction end of the second siphon 22 generates negative pressure after the liquid level of the liquid pre-treated by the tertiary treatment device 3 drops, and can suck the liquid after the impurities are separated by the secondary treatment device 2 into the second temporary storage area 32 for temporary storage, so as to disinfect the tertiary treatment device 3;

[0071] The tertiary treatment device 3 is connected to a discharge pipe 31, on which a water quality monitoring component and a discharge valve are sequentially arranged; wherein, when the water quality data detected by the water quality monitoring component reaches the safe discharge standard, the discharge valve on the discharge pipe 31 opens to discharge the water that meets the safe discharge standard.

[0072] By adopting the above technical solution, when the liquid filtered by the primary treatment device 1 is transported to the secondary treatment device 2, it can be automatically transported through the first delivery pipe 11 or automatically sucked by the first siphon 12, and when the liquid after impurity separation in the secondary treatment device 2 is transported to the tertiary treatment device 3, it can be automatically transported through the second delivery pipe 21 or automatically sucked by the second siphon 22, without the need to use high-energy-consuming and high-noise equipment such as water pumps, thereby reducing the cost of sewage treatment and reducing the impact and harm of noise on the lives of people and nearby residents; at the same time, since the first siphon 12 and the second siphon 22 are based on the siphon effect for transportation, the first siphon 12 and the second siphon 22 can be used to automatically transport the liquid, reducing equipment loss and equipment cost, and no repeated maintenance is required, further reducing the cost of sewage treatment, and can further achieve stable and accurate transportation to ensure the supply and demand balance of the system.

[0073] As needed, the first siphon tube 12 and the second siphon tube 22 are shaped like an inverted "U", and a telescopic tube or a folding tube is respectively provided at both ends of the first siphon tube 12 and the second siphon tube 22, and an adjusting part for driving the telescopic tube or the folding tube is also correspondingly provided at both ends of the first siphon tube 12 and the second siphon tube 22; wherein the folding tube can be switched between an extended state and a folded state as driven by the adjusting part, and the telescopic tube can be switched between an extended state and a contracted state as driven by the adjusting part.

[0074] According to needs, the adjusting member may include a driving member and a transmission member. The driving member may include a cylinder or a motor, and the transmission member may include a rod and a rack. For example, when the driving member is a cylinder, the driving end of the cylinder is connected to the end of the telescopic tube or folding tube close to the liquid through the rod, thereby realizing the length change of the telescopic tube or folding tube driven by the cylinder; or, when the driving member is a motor, the driving end of the motor is installed with a gear that meshes with the rack and is connected to the end of the telescopic tube or folding tube close to the liquid through the rack, so that when the motor rotates, the rack is driven up and down by the gear to realize the driving of the telescopic tube or folding tube to change the length; so that the liquid at the end can be sucked to the lower-level processing device.

[0075] For example, when the level of the absorbed liquid rises, the driving member drives the end of the telescopic tube or folded tube to rise, thereby absorbing the liquid on the top surface and ensuring that the absorbed liquid is a relatively clean liquid after sedimentation; when the liquid level at the delivery end drops, the driving member drives the end of the telescopic tube or folded tube to drop to ensure that the end is in the liquid, thereby absorbing the liquid and ensuring the stable delivery work, or after negative pressure is generated at the absorption end, the delivery end is controlled to rise to allow the output liquid to contact with the air, increase oxygen, promote microbial metabolism, and remove COD.

[0076] like Figure 2-3 As shown, the present application can be further configured in a preferred example as follows: the primary treatment device 1 includes a box body;

[0077] The box body is provided with a protrusion 13 and a partition 14, and a coarse grid 15 is connected between the partition 14 and the protrusion 13. The accommodating space inside the box body is divided by the protrusion 13, the partition 14 and the coarse grid 15 to form a collection area 17 and a filtration area 18. The bottom surface of the collection area 17 is lower than the top surface of the protrusion 13, and the filtration area 18 is above the top surface of the protrusion 13. The box body is also connected to a water inlet pipe 101 for conveying sewage, and the water inlet pipe 101 is in communication with the collection area 17.

[0078] A fine grid 16 is provided in the collection area 17. The fine grid 16 is connected to the partition 14 and the inner wall of the box, respectively, to divide the filtration area 18 into a primary filtration area 181 and a secondary filtration area 182. The primary filtration area 181 is below the fine grid 16, and the secondary filtration area 182 is above the fine grid 16.

[0079] The two ends of the first delivery pipe 11 are connected to the secondary filtration area 182 and the first temporary storage area 23 respectively, and the first siphon pipe 12 is respectively arranged in the secondary filtration area 182 and the first temporary storage area 23.

[0080] By adopting the above technical solution, a partition 14 and a coarse grid 15 are set in the box body, and the coarse grid 15 is connected to the partition 14 to separate the inside of the box body into a collection area 17 and a filtration area 18, and the filtration area 18 is above the top surface of the protrusion 13. At this time, since the bottom of the filtration area 18 is higher than the collection area 17, under the action of gravity, the impurities in the sewage can be preliminarily precipitated, and since the collection area 17 and the filtration area 18 are separated by the partition 14 and the coarse grid 15, the liquid entering the filtration area 18 is further filtered and isolated by the coarse grid 15. At the same time, a fine grid 16 is installed in the filtration area 18, and the fine grid 16 is connected to the partition 14 and the wall of the box body, which can divide the filtration area 18 into a primary filtration area 1 81 and the secondary filtration area 182 above the primary filtration area 181 receive the liquid filtered by the coarse grid 15 through the primary filtration area 181, and receive the liquid filtered by the fine grid 16 through the secondary filtration area 182, thereby realizing multi-level real-time filtration effect of the raw sewage through the box body, without the need to use multiple devices in combination, reducing equipment cost and floor space, and at the same time, under the action of gravity, impurities can continue to settle downward, thereby ensuring that the liquid in the secondary filtration area 182 is the optimally filtered liquid (that is, the cleanest liquid in the box body), so that after being transported to the subsequent process through the first siphon 12 or the first delivery pipe 11, the processing difficulty of the subsequent process is reduced and the subsequent processing steps are reduced, thereby greatly improving the treatment efficiency and treatment effect of the sewage.

[0081] As needed, a pollutant collection port can also be provided at the bottom of the box, and the pollutant collection port is connected to the collection area 17. The pollutant collection port is installed with a sealing cover. When it is necessary to collect pollutants in the collection area 17, the sealing cover can be opened to facilitate the discharge and cleaning of the pollutants.

[0082] like Figure 2-3As shown, in a preferred example, the present application can be further configured as follows: the partition 14 includes an inclined section 141 and a vertical section 142 connected sequentially from top to bottom, the vertical section 142 is arranged parallel to an opposite surface of the box body, the vertical section 142 of the partition 14 is connected to the protrusion 13 through the fine grid 16, and the inclined section 141 is gradually inclined from top to bottom along the direction of the collection area 17;

[0083] As required, the coarse grid 15 is tilted, and the coarse grid 15 is gradually tilted from top to bottom along the direction of the primary filtration area 181;

[0084] As needed, the fine grid 16 is arranged at an angle, and the fine grid 16 is gradually inclined from left to right along the direction of the primary filtration area 181;

[0085] As needed, the top surface of the protrusion 13 is tilted, and the top surface of the protrusion 13 is gradually tilted downward from right to left;

[0086] As needed, a filter layer 19 is further provided above the fine grid 16 , with a distance between the filter layer 19 and the fine grid 16 , and the filter layer 19 is located below the first conveying pipe 11 and the first siphon pipe 12 , wherein the filter layer 19 includes filter cloth.

[0087] By adopting the above technical solution, since the partition 14 includes an inclined section 141 and a vertical section 142 connected in sequence from top to bottom, the vertical section 142 is connected to the protrusion 13 through the fine grid 16, thereby realizing the division of the interior of the box into a collection area 17 and a filtration area 18, and by gradually tilting the inclined section 141 from top to bottom in the direction of the collection area 17, the accommodation space and the collection opening of the collection area 17 are increased, thereby facilitating the collection and sedimentation of sewage, preventing impurities and pollutants from entering the filtration area 18, and facilitating the salvage and cleaning of floating objects; in addition, by tilting the coarse grid 15, and gradually tilting the coarse grid 15 from top to bottom in the direction of the primary filtration area 181 The arrangement prevents impurities and pollutants from entering the collection area 17 from the water inlet pipe 101. When they settle downward under the action of gravity, they are not easy to enter the primary filtration area 181 domain 18, thereby achieving good filtration of the sewage. Moreover, due to the inclined arrangement of the coarse grid 15, filtration in the inclined direction is achieved, which is better than filtration in the horizontal and vertical directions during use, thereby further improving the filtration effect. Furthermore, by arranging the fine grid 16 in an inclined manner, and the fine grid 16 is gradually inclined from left to right along the direction of the primary filtration area 181, due to the inclined arrangement of the coarse grid 15, filtration in the inclined direction is achieved, which is better than filtration in the horizontal and vertical directions during use, thereby avoiding impurities from being transported by the first conveying pipe 11 or the first siphon 1 2 is sucked into the secondary treatment device 2, further improving the filtering effect; and by tilting the top surface of the protrusion 13, the top surface of the protrusion 13 is gradually tilted downward from right to left. Under the action of gravity, the impurities in the primary filtration area 181 and the secondary filtration area 182 can accurately settle on the inclined top surface of the protrusion 13 when they settle downward, and slide through the inclined top surface of the protrusion 13 to the collection area 17, achieving a real-time filtration effect and ensuring that impurities and pollutants can be centrally processed and collected, further improving the sewage filtration and treatment effect; further, a filter layer 19 is set above the fine grid 16, and there is a gap between the filter layer 19 and the fine grid 16, and the filter layer 19 includes The filter cloth can effectively filter the sewage. When the water inlet pipe 101 transports the sewage into the box, the sewage first enters the collection area 17. When the sewage level reaches the top surface of the protrusion 13, it is filtered through the coarse grid 15 and then enters the primary filter area 181. When the sewage level in the primary filter area 181 reaches the fine grid 16, it is filtered through the fine grid 16 and reaches the bottom of the filter layer 19. After passing through the filter layer 19, it enters the secondary filter area 182, so that it can be transported by the first delivery pipe 11 and sucked into the secondary treatment device 2 by the first siphon pipe 12 for treatment. At the same time, during the working process, impurities and pollutants can be continuously precipitated in the collection area 17, so as to facilitate centralized collection and treatment and achieve multi-level filtering effects.

[0088] like Figure 2As shown, in a preferred example, the present application can be further configured as follows: the secondary treatment device 2 is further provided with a biological filtration area 24, a membrane filtration area 25 and a first output area 26 in sequence; the first temporary storage area 23 is connected to the biological filtration area 24, the biological filtration area 24 is connected to the membrane filtration area 25, and the membrane filtration area 25 is connected to the first output area 26; the biological filtration area 24 is used to degrade organic matter in the liquid, and the membrane filtration area 25 is used to separate impurities in the liquid;

[0089] The three-stage treatment device 3 is further provided with an activated carbon area 33, a disinfection area 34, and a second output area 35 in sequence. The second temporary storage area 32 is connected to the activated carbon area 33, the activated carbon area 33 is connected to the disinfection area 34, and the disinfection area 34 is connected to the second output area. The activated carbon area 33 is used to remove organic matter and heavy metals in the liquid, and the disinfection area 34 is used to disinfect the liquid.

[0090] The two ends of the second delivery pipe 21 are respectively connected to the first output area 26 and the second temporary storage area 32 , and the two ends of the second siphon pipe 22 are respectively arranged in the first output area 26 and the second temporary storage area 32 .

[0091] By adopting the above technical solution, by sequentially arranging the biological filtration area 24, the membrane filtration area 25 and the first area to be output 26 in the secondary treatment device 2, and the membrane filtration area 25 is connected to the first area to be output 26, it is possible to sequentially process the liquid output through the first temporary storage area 23, and after reaching the first area to be output 26, it can be transported by the second transport pipe 21 or sucked by the second siphon 22 to the tertiary treatment device 3 for treatment. By sequentially arranging the activated carbon area 33, the disinfection area 34 and the second area to be output 35 in the tertiary treatment device 3, and the second temporary storage area 32 is connected to the activated carbon area 33, it is possible to sequentially process the liquid output through the second temporary storage area 32, and after reaching the second area to be output 35, it can be discharged by the discharge pipe 31 or refluxed by the reflux pipe 36 for secondary treatment, thereby achieving stable and efficient treatment of sewage, reducing floor space, and lowering treatment costs.

[0092] Among them, as needed, the size of the first temporary storage area 23 and the second temporary storage area 32 can be set to only accommodate the corresponding first siphon tube 12 or second siphon tube 22, so as to ensure that the liquid in the upper processing device can be absorbed when the liquid level drops, so as to facilitate the subsequent process to process the liquid transported in sequence and reduce contamination of the liquid processed in the subsequent area.

[0093] It is understood that the primary treatment unit 1, secondary treatment unit 2, and tertiary treatment unit 3 may be provided with openings at the top as needed. Specifically, the biological filtration zone 24 and membrane filtration zone 25 in the secondary treatment unit 2, and the activated carbon zone 33 and disinfection zone 34 in the tertiary treatment unit 3 may be equipped with corresponding treatment equipment as needed to treat the liquid and / or administer pharmaceuticals for complementary treatment. For example, the biological filtration zone 24 may decompose organic matter using biological filters and bio-inoculation agents, while the membrane filtration zone 25 may further filter and separate impurities using membrane separation equipment. The activated carbon zone 33 may further remove residual suspended and dissolved matter, organic matter, and heavy metal ions using sand filters and activated carbon filters. The disinfection zone 34 may disinfect the water using methods such as ultraviolet light, ozone, and chlorine to kill residual bacteria and pathogens, and use advanced oxidants such as ozone to further remove refractory substances. As needed, sodium hypochlorite and other agents may be used to neutralize the chlorine to ensure effluent quality.

[0094] The first temporary storage area 23 or the biological filtration area 24 can increase oxygen through aeration equipment to promote microbial metabolism and COD removal;

[0095] Among them, flocculants can also be added into the primary treatment device 1 to promote the aggregation of tiny particles into larger particles, which is convenient for subsequent solid-liquid separation.

[0096] In a preferred example, the present application may be further configured as follows: a first liquid level monitor is provided in the primary treatment device 1, and when the liquid in the primary treatment device 1 does not reach the first liquid level, the one-way valve on the first delivery pipe 11 is closed, and the first siphon pipe 12 does not operate;

[0097] like Figure 4 As shown, a second liquid level monitor is provided in the secondary treatment device 2. When the liquid in the primary treatment device 1 reaches the first liquid level and the liquid in the secondary treatment device 2 does not reach the second liquid level, the one-way valve on the first delivery pipe 11 opens and the first siphon pipe 12 does not work.

[0098] like Figure 1-2 As shown, when the liquid in the primary treatment device 1 reaches a first liquid level and the liquid in the secondary treatment device 2 reaches a second liquid level, the one-way valve on the first delivery pipe 11 is closed and the first siphon pipe 12 is in operation;

[0099] like Figure 2 As shown, the suction end position of the first siphon tube 12 is higher than or equal to the first liquid level position, and the delivery end position of the first siphon tube 12 is higher than or equal to the second liquid level position.

[0100] By adopting the above technical solution, the liquid delivery work of the first delivery pipe 11 and the first siphon pipe 12 is precisely controlled according to the liquid level conditions in the primary treatment device 1 and the secondary treatment device 2. When the liquid level in the primary treatment device 1 reaches the first liquid level, the one-way valve on the first delivery pipe 11 is controlled to open, so that the liquid filtered by the primary treatment device 1 is quickly delivered to the secondary treatment device 2. When the liquid in the primary treatment device 1 and the secondary treatment device 2 reaches the second liquid level, the one-way valve is closed, so that the first siphon pipe 12 generates negative pressure as the liquid level in the secondary treatment device 2 drops and is sucked into the secondary treatment device 2, thereby ensuring that the liquid in the primary treatment device 1 is stably delivered to the secondary treatment device 2 for treatment as needed, and achieving a precise supply and demand balance effect.

[0101] In a preferred example, the present application may be further configured as follows: when the liquid in the secondary treatment device 2 does not reach the third liquid level, the one-way valve on the second delivery pipe 21 is closed, and the second siphon pipe 22 does not work;

[0102] like Figure 4 As shown, a third liquid level monitor is provided in the tertiary treatment device 3. When the liquid in the secondary treatment device 2 reaches the third liquid level and the liquid in the tertiary treatment device 3 does not reach the fourth liquid level, the one-way valve on the second delivery pipe 21 is opened and the second siphon pipe 22 does not work.

[0103] like Figure 1-2 As shown, when the liquid in the secondary treatment device 2 reaches the third liquid level and the liquid in the tertiary treatment device 3 reaches the fourth liquid level, the one-way valve on the second delivery pipe 21 is closed and the second siphon pipe 22 is in operation;

[0104] The suction end of the second siphon tube 22 is located at a position higher than or equal to the third liquid level, and the suction end of the second siphon tube 22 is located at a position higher than or equal to the fourth liquid level.

[0105] By adopting the above technical solution, the liquid delivery work of the second delivery pipe 21 and the second siphon pipe 22 is precisely controlled according to the liquid level conditions in the secondary treatment device 2 and the tertiary treatment device 3. When the liquid level in the secondary treatment device 2 reaches the third liquid level, the one-way valve on the second delivery pipe 21 is controlled to open, so that the liquid filtered by the secondary treatment device 2 is quickly delivered to the tertiary treatment device 3. When the liquid in the secondary treatment device 2 and the tertiary treatment device 3 reaches the fourth liquid level, the one-way valve is closed, so that the second siphon pipe 22 generates negative pressure as the liquid level in the tertiary treatment device 3 drops and is sucked into the tertiary treatment device 3, thereby ensuring that the liquid in the secondary treatment device 2 is stably delivered to the tertiary treatment device 3 for treatment as needed, and achieving a precise supply and demand balance effect.

[0106] like Figure 5-6 As shown, in a preferred example, the present application can be further configured as follows: a return pipe 36 is connected between the discharge pipe 31 and the first delivery pipe 11 and the second delivery pipe 21;

[0107] The return pipe 36 is provided with a third one-way valve and a fourth one-way valve. The third one-way valve is provided between the discharge pipe 31 and the first delivery pipe 11 , and the fourth one-way valve is provided between the discharge pipe 31 and the second delivery pipe 21 .

[0108] By adopting the above technical solution and setting up a reflux pipe 36, when it is monitored that the liquid does not meet the safety discharge standard, the liquid is refluxed through the reflux pipe 36 according to the water quality monitoring result to perform secondary treatment on the liquid, thereby ensuring that the discharged liquid is within the provisions of the safety discharge standard.

[0109] It can be understood that the water quality monitoring component is equipped with corresponding monitoring instruments according to the treatment process of the secondary treatment device 2 and the tertiary treatment device 3 or the monitoring factors of the emission standards, such as turbidity meter, iron and manganese ion monitor, bromide ion monitor, chloride ion monitor, flow monitor and conductivity monitor, etc., to facilitate the corresponding monitoring of the water quality of the output liquid to monitor whether the output liquid meets the emission standards.

[0110] In a preferred example, the present application may be further configured as follows: further comprising a control device, the control device comprising a first control module, a second control module, and a third control module;

[0111] The primary treatment device 1 is connected to a water inlet pipe 101, and a water inlet valve is provided on the water inlet pipe 101. The first delivery pipe 11 and the first siphon pipe 12 are provided with a first flow monitor; the first control module is used to determine a first target opening of the water inlet valve based on the flow monitoring result of the first flow monitor and the liquid level monitoring result of the first liquid level monitor, and control the water inlet valve to operate at the first target opening;

[0112] The second delivery pipe 21 and the second siphon pipe 22 are provided with a second flow monitor; the second control module is used to determine a second target opening of the one-way valve on the first delivery pipe 11 based on the flow monitoring result of the second flow monitor and the liquid level monitoring result of the second liquid level monitor, and control the one-way valve on the first delivery pipe 11 to operate at the second target opening;

[0113] The discharge pipe 31 is provided with a third flow monitor, and the third flow monitor and the water quality monitoring component are arranged in sequence. The third control module is used to determine the third target opening of the one-way valve on the second delivery pipe 21 according to the flow monitoring result of the third flow monitor and the liquid level monitoring result of the third liquid level monitor, and control the one-way valve on the second delivery pipe 21 to operate at the third target opening.

[0114] By adopting the above technical solution, the first control module, the second control module and the third control module can achieve precise control of the water inlet valve and the one-way valves on the first delivery pipe 11 and the second delivery pipe 21, thereby ensuring the effect of precise delivery of liquid.

[0115] In a preferred example, the present application can be further configured as follows: the first control module, the second control module and the third control module each include a first determination unit, a second determination unit, a third determination unit, a calculation unit and a control unit,

[0116] The first determining unit is used to determine a first membership value corresponding to the liquid level monitoring result and a second membership value corresponding to the flow monitoring result;

[0117] The second determining unit is used to obtain a current liquid level error and a liquid level change rate, and determine a target fuzzy rule based on the current liquid level error and the liquid level change rate;

[0118] The third determining unit is configured to determine the membership distribution corresponding to the first membership value and the second membership value according to the target fuzzy rule;

[0119] The calculation unit is used to calculate the output value corresponding to the membership distribution according to a preset algorithm;

[0120] The control unit is used to use the output value as the corresponding first target opening, second target opening or third target opening, so as to control the operation of the water inlet valve, the one-way valve on the first delivery pipe 11 or the one-way valve on the second delivery pipe 21 according to the first target opening, the second target opening or the third target opening.

[0121] By adopting the above technical solution, for the control of the water inlet valve and the one-way valve, the target opening of the water inlet valve and the one-way valve can be calculated according to the liquid level value in the liquid level monitoring result, the flow value in the flow monitoring result, and the current liquid level error and liquid level change rate, so as to control the water inlet valve and the one-way valve to operate according to the target opening, thereby ensuring that the liquid supply and demand in the sewage treatment system is balanced and stable during the sewage treatment process.

[0122] The following is an example of how to calculate the first target opening of the water inlet valve based on the above conditions. Here, the fuzzy control model is used to calculate the opening:

[0123] First, determine the first membership value corresponding to the liquid level value in the monitoring result of the first liquid level monitor, and the second membership value corresponding to the flow rate value of the first flow rate monitor. In this example, a corresponding fuzzy set is predefined for each input quantity (i.e., liquid level value, flow rate value), and the membership value is characterized by the degree of membership between the input quantity and the fuzzy set. The membership value can be calculated using a Gaussian function, a triangular function, and a gradient function as the membership function. The specific numerical value can be obtained by relevant tests by those skilled in the art.

[0124] After calculating the membership, the current liquid level error and liquid level change rate in the primary processing device 1 are obtained, and a target fuzzy rule is determined based on the current liquid level error and liquid level change rate. In this embodiment, considering that different current liquid level errors and liquid level change rates correspond to different delivery volumes, different fuzzy rules are predefined based on the current liquid level error and liquid level change rate. The corresponding fuzzy rule is then selected based on the obtained current liquid level error and liquid level change rate.

[0125] Initialize and set up fuzzy sets: First, we need to define the input and output variables of the fuzzy controller and create the corresponding fuzzy sets.

[0126] Input variables: 1. Liquid level error (E): The deviation between the actual liquid level and the set level. If needed, the target level can be set to a level that satisfies or exceeds the liquid level in the first and second siphon tubes 12, 22 to ensure rapid reaching of the target level, ensuring stable operation of the first and second siphon tubes 12, 22 and achieving automated operation. 2. Liquid level change rate (ΔE): The rate of change of the liquid level error.

[0127] Output variables: 1. Water inlet valve opening adjustment (Δu): the adjustment value of the water inlet valve opening.

[0128] Each variable is usually divided into several fuzzy sets. For example:

[0129] Liquid level error (E): {negative, zero, positive}.

[0130] Liquid level change rate (ΔE): {falling, stable, rising}.

[0131] Water inlet valve opening value (Δu): {large opening area, medium opening area, small opening area}.

[0132] The definition of fuzzy rules is as follows:

[0133] If the liquid level error (E) is negative and the liquid level change rate (ΔE) is decreasing, the water inlet valve opening value (Δu) is in the large opening range;

[0134] If the liquid level error (E) is positive and the liquid level change rate (ΔE) is increasing, the water inlet valve opening value (Δu) is in the small opening range;

[0135] Otherwise, the opening value is in the medium opening range.

[0136] It should be noted that the liquid level error (E) and liquid level change rate (ΔE) can be calculated using the following formula:

[0137] E = target liquid level - current liquid level; ΔE = current liquid level error - previous liquid level error;

[0138] Furthermore, based on the selected target fuzzy rule, the membership distribution corresponding to the first membership value and the second membership value is determined, thereby performing defuzzification. Optionally, the membership distribution can be determined by taking the maximum value among the various memberships, and then the output value corresponding to the membership distribution is calculated, and the calculation method can adopt a weighted average method.

[0139] For example, if the selected target fuzzy rule is: the opening value is in the medium opening range [50-70], and the calculated output value is 65, then the first target opening of the water inlet valve is set to 65.

[0140] In the technical solution provided in the above embodiment, since the liquid level and flow rate are dynamically changing, and the liquid level error and liquid level change rate are also dynamically changing, in order to adapt to such dynamic changes, the opening of the corresponding water inlet valve or one-way valve is controlled according to the liquid level value in the liquid level monitoring result, the flow value in the flow monitoring result, and the current liquid level error and liquid level change rate, so that the amount of water entering the treatment changes adaptively, ensuring that each treatment device is not overloaded, extending the service life, and also ensuring the balance and stability of liquid supply and demand. At the same time, it can quickly ensure that the working conditions of the first siphon tube 12 are met, thereby realizing automated operation.

[0141] By dynamically adjusting the opening of the water inlet valve and the one-way valve according to the changes in the liquid level and the corresponding flow value of the corresponding treatment device, the sewage is effectively transported to each treatment device to ensure stable operation of the system.

[0142] The use of sewage treatment systems can reduce investment and operating costs, optimize process flow, reduce maintenance and management difficulties, and reduce ancillary equipment and floor space, which is conducive to the promotion and use of sewage treatment. Specifically, it also has the following beneficial effects:

[0143] Reduced energy consumption: No need for large amounts of energy to maintain operations, reducing excessive pump operation, etc., reducing treatment costs and reducing environmental impact.

[0144] Improved treatment efficiency: The primary treatment device 1 can filter the sewage well without the need for additional or excessive processes for multiple filtration treatments, thereby reducing the complexity and cost of subsequent processes.

[0145] Achieve treatment of multiple pollutants: A variety of pollutants, such as heavy metals, organic matter, etc., can be treated through the secondary treatment device 2 and the tertiary treatment device 3.

[0146] Reduction of equipment maintenance costs: Automatic transportation is achieved by adopting the first siphon 12 and the second siphon 22, thereby reducing equipment maintenance costs and equipment expenses, and the sewage is collected centrally by the primary treatment device 1, thereby facilitating centralized treatment of pollutants, avoiding impact on subsequent equipment, reducing equipment damage rate and extending equipment life, and reducing maintenance costs.

[0147] Avoiding water waste: Automatic water delivery and precise control of the inlet and check valves via the first and second siphons 12 and 22 ensure a balanced supply and demand, avoiding water waste and fluctuations in water volume during the treatment process. This sewage treatment technology offers simple management, stable operation, and easy maintenance, allowing for unattended operation.

[0148] In the second aspect, the above-mentioned invention object of this application is achieved through the following technical solutions:

[0149] A sewage treatment method comprises the following steps:

[0150] A primary treatment device 1, a secondary treatment device 2, and a tertiary treatment device 3 are sequentially arranged; wherein a first delivery pipe 11 and a first siphon pipe 12 are connected between the primary treatment device 1 and the secondary treatment device 2, a second delivery pipe 21 and a second siphon pipe 22 are connected between the secondary treatment device 2 and the tertiary treatment device 3, a one-way valve is provided on each of the first delivery pipe 11 and the second delivery pipe 21, the secondary treatment device 2 is provided with a first temporary storage area 23, the tertiary treatment device 3 is provided with a second temporary storage area 32, the tertiary treatment device 3 is connected to a discharge pipe 31, and a water quality monitoring component and a discharge valve are sequentially provided on the discharge pipe 31;

[0151] When the first siphon pipe 12 is in operation, the one-way valve on the first delivery pipe 11 is controlled to be closed, the suction end of the first siphon pipe 12 is in the liquid filtered by the primary treatment device 1, and the delivery end of the first siphon pipe 12 is in the liquid in the first temporary storage area 23. The suction end of the first siphon pipe 12 is located higher than the delivery end of the first siphon pipe 12, so that the suction end of the first siphon pipe 12 generates negative pressure after the liquid level in the first temporary storage area 23 drops, and can suck the liquid filtered by the primary treatment device 1 into the first temporary storage area 23 of the secondary treatment device 2 for temporary storage, so as to separate impurities in the secondary treatment device 2;

[0152] When the second siphon pipe 22 is in operation, the one-way valve on the second delivery pipe 21 is controlled to be closed, the suction end of the second siphon pipe 22 is in the liquid after impurities are separated by the secondary treatment device 2, and the delivery end of the second siphon pipe 22 is in the liquid in the second temporary storage area 32, and the suction end of the second siphon pipe 22 is located higher than the delivery end of the second siphon pipe 22, so that the suction end of the second siphon pipe 22 generates negative pressure after the liquid level of the liquid pre-treated by the tertiary treatment device 3 drops, and can suck the liquid after impurities are separated by the secondary treatment device 2 into the second temporary storage area 32 for temporary storage, so as to disinfect the tertiary treatment device 3;

[0153] When the water quality data detected by the water quality monitoring component reaches the safe discharge standard, the discharge valve on the discharge pipe 31 is controlled to open to discharge the water that reaches the safe discharge standard.

[0154] By adopting the above technical solution, a partition 14 and a coarse grid 15 are set in the box body, and the coarse grid 15 is connected to the partition 14 to divide the interior of the box body into a collection area 17 and a filtration area 18, and the filtration area 18 is above the top surface of the protrusion 13. At this time, since the bottom of the filtration area 18 is higher than the collection area 17, under the action of gravity, the impurities in the sewage can be preliminarily precipitated, and since the collection area 17 and the filtration area 18 are separated by the partition 14 and the coarse grid 15, the liquid entering the filtration area 18 is further filtered and isolated by the coarse grid 15. At the same time, a fine grid 16 is installed in the filtration area 18, and the fine grid 16 is connected to the partition 14 and the wall of the box body, which can divide the filtration area 18 into a primary filtration area 18 1 and the secondary filtration area 182 above the primary filtration area 181, receive the liquid filtered by the coarse grid 15 through the primary filtration area 181, and receive the liquid filtered by the fine grid 16 through the secondary filtration area 182, thereby realizing a multi-level real-time filtration effect on the raw sewage through the box body, without the need to use multiple devices in combination, reducing equipment costs and floor space, and at the same time, under the action of gravity, impurities can continue to settle downward, thereby ensuring that the liquid in the secondary filtration area 182 is the optimally filtered liquid (that is, the cleanest liquid in the box body), so that after being transported to the subsequent process through the first siphon 12 or the first delivery pipe 11, the processing difficulty of the subsequent process is reduced and the subsequent processing steps are reduced, thereby greatly improving the treatment efficiency and treatment effect of the sewage.

[0155] For the specific definition of the system, please refer to the definition of the method above and will not be repeated here. Each module in the above system can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software so that the processor can call and execute the operations corresponding to each of the above modules.

[0156] Those skilled in the art will clearly understand that for the sake of convenience and brevity in description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above.

[0157] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A sewage treatment method, using a sewage treatment system, characterized in that: The sewage treatment system includes a primary treatment device, a secondary treatment device, a tertiary treatment device and a control device, the primary treatment device is connected to a water inlet pipe, the water inlet pipe is provided with a water inlet valve, a first delivery pipe and a first siphon pipe are connected between the primary treatment device and the secondary treatment device, and a second delivery pipe and a second siphon pipe are connected between the secondary treatment device and the tertiary treatment device; wherein, a one-way valve is provided on both the first delivery pipe and the second delivery pipe, the first delivery pipe and the first siphon are provided with a first flow monitor; the second delivery pipe and the second siphon are provided with a second flow monitor; a first liquid level monitor is provided in the primary treatment device; the secondary treatment device is provided with a first temporary storage area and a second liquid level monitor, and the tertiary treatment device is provided with a second temporary storage area and a third liquid level monitor; the tertiary treatment device is connected to a discharge pipe, and a third flow monitor, a water quality monitoring component and a discharge valve are provided on the discharge pipe in sequence; The sewage treatment method comprises: The primary treatment unit, the secondary treatment unit and the tertiary treatment unit are arranged in sequence; When the liquid in the primary treatment device does not reach the first liquid level, the one-way valve on the first delivery pipe is closed and the first siphon pipe does not work; When the liquid in the primary treatment device reaches a first liquid level and the liquid in the secondary treatment device has not reached a second liquid level, the one-way valve on the first delivery pipe opens and the first siphon pipe does not operate; wherein the suction end of the first siphon pipe is located at a position higher than or equal to the first liquid level, and the delivery end of the first siphon pipe is located at a position higher than or equal to the second liquid level; When the liquid in the primary treatment device reaches a first liquid level and the liquid in the secondary treatment device reaches a second liquid level, the one-way valve on the first delivery pipe is closed and the first siphon tube is operated; wherein, when the first siphon tube is in operation, the suction end of the first siphon tube is in the liquid filtered by the primary treatment device, and the delivery end of the first siphon tube is in the liquid in the first temporary storage area, and the suction end of the first siphon tube is located higher than the delivery end of the first siphon tube, so that the suction end of the first siphon tube generates negative pressure after the liquid level in the first temporary storage area drops, and can suck the liquid filtered by the primary treatment device into the first temporary storage area of the secondary treatment device for temporary storage, so as to separate impurities in the secondary treatment device; When the liquid in the secondary treatment device does not reach the third liquid level, the one-way valve on the second delivery pipe is closed and the second siphon pipe does not work; When the liquid in the secondary treatment device reaches a third liquid level and the liquid in the tertiary treatment device has not reached a fourth liquid level, the one-way valve on the second delivery pipe opens and the second siphon pipe stops operating; wherein the suction end of the second siphon pipe is located at a position higher than or equal to the third liquid level and the suction end of the second siphon pipe is located at a position higher than or equal to the fourth liquid level; When the liquid in the secondary treatment device reaches a third liquid level and the liquid in the tertiary treatment device reaches a fourth liquid level, the one-way valve on the second delivery pipe is closed and the second siphon is operated; wherein, when the second siphon is in operation, the suction end of the second siphon is in the liquid after impurities are separated by the secondary treatment device, and the delivery end of the second siphon is in the liquid in the second temporary storage area, and the suction end of the second siphon is located higher than the delivery end of the second siphon, so that the suction end of the second siphon generates negative pressure after the liquid level of the pre-treated liquid in the tertiary treatment device drops, and can suck the liquid after impurities are separated by the secondary treatment device into the second temporary storage area for temporary storage, so as to facilitate disinfection of the tertiary treatment device; When the water quality data detected by the water quality monitoring component reaches the safe discharge standard, the discharge valve on the discharge pipe is opened to discharge the water that reaches the safe discharge standard; Wherein, the control device includes a first control module, a second control module and a third control module; the first control module is used to determine a first target opening of the water inlet valve according to the flow monitoring result of the first flow monitor and the liquid level monitoring result of the first liquid level monitor, and control the water inlet valve to operate at the first target opening; the second control module is used to determine a second target opening of the one-way valve on the first delivery pipe according to the flow monitoring result of the second flow monitor and the liquid level monitoring result of the second liquid level monitor, and control the one-way valve on the first delivery pipe to operate at the second target opening; the third control module is used to determine a third target opening of the one-way valve on the second delivery pipe according to the flow monitoring result of the third flow monitor and the liquid level monitoring result of the third liquid level monitor, and control the one-way valve on the second delivery pipe to operate at the third target opening; The first control module, the second control module and the third control module all include a first determination unit, a second determination unit, a third determination unit, a calculation unit and a control unit; the first determination unit is used to determine the first membership value corresponding to the liquid level monitoring result, and the second membership value corresponding to the flow monitoring result; the second determination unit is used to obtain the current liquid level error and the liquid level change rate, and determine the target fuzzy rule based on the current liquid level error and the liquid level change rate; the third determination unit is used to determine the membership distribution corresponding to the first membership value and the second membership value according to the target fuzzy rule; the calculation unit is used to calculate the output value corresponding to the membership distribution according to a preset algorithm; the control unit is used to use the output value as the corresponding first target opening, second target opening or third target opening.

2. A sewage treatment method according to claim 1, characterized in that: The primary treatment device includes a box; The box body is provided with a protrusion and a partition, and a coarse grid is connected between the partition and the protrusion; the interior of the box body is divided by the protrusion, the partition and the coarse grid to form a collection area and a filtration area, the bottom surface of the collection area is lower than the top surface of the protrusion, and the filtration area is above the top surface of the protrusion. The box body is also connected to a water inlet pipe for conveying sewage, and the water inlet pipe is in communication with the collection area; A fine grid is provided in the collection area, and the fine grid is respectively connected to the partition plate and the inner wall of the box to divide the filtration area into a primary filtration area and a secondary filtration area, and the primary filtration area is below the fine grid, and the secondary filtration area is above the fine grid; Wherein, both ends of the first delivery pipe are connected to the secondary filtration area and the first temporary storage area respectively, and the first siphon pipe is respectively arranged in the secondary filtration area and the first temporary storage area.

3. A sewage treatment method according to claim 2, characterized in that: The partition includes an inclined section and a vertical section connected in sequence from top to bottom, the vertical section is arranged parallel to an opposite surface of the box body, the vertical section of the partition is connected to the protrusion through the fine grid, and the inclined section is arranged to be gradually inclined from top to bottom along the direction of the collection area; The coarse grid is arranged in an inclined manner, and the coarse grid is gradually inclined from top to bottom along the direction of the primary filtration area; The fine grid is arranged obliquely, and the fine grid is gradually inclined from left to right along the direction of the primary filtration area; The top surface of the protrusion is inclined, and the top surface of the protrusion is gradually inclined downward from right to left; A filter layer is further provided above the fine grid, with a distance between the filter layer and the fine grid, and the filter layer is located below the first delivery pipe and the first siphon pipe, wherein the filter layer includes filter cloth.

4. A sewage treatment method according to claim 1, characterized in that: The secondary treatment device is further provided with a biological filtration area, a membrane filtration area and a first output area in sequence, the first temporary storage area is connected to the biological filtration area, the biological filtration area is connected to the membrane filtration area, and the membrane filtration area is connected to the first output area; the biological filtration area is used to degrade organic matter in the liquid, and the membrane filtration area is used to separate impurities in the liquid; The three-stage treatment device is further provided with an activated carbon area, a disinfection area, and a second output area in sequence. The second temporary storage area is connected to the activated carbon area, the activated carbon area is connected to the disinfection area, and the disinfection area is connected to the second output area. The activated carbon area is used to remove organic matter and heavy metals in the liquid, and the disinfection area is used to disinfect the liquid. Wherein, two ends of the second delivery pipe are respectively connected to the first area to be output and the second temporary storage area, and two ends of the second siphon pipe are respectively arranged in the first area to be output and the second temporary storage area.

5. A sewage treatment method according to claim 1, characterized in that: A return pipe is connected between the discharge pipe and the first delivery pipe and the second delivery pipe; The return pipe is provided with a third one-way valve and a fourth one-way valve. The third one-way valve is provided between the discharge pipe and the first delivery pipe, and the fourth one-way valve is provided between the discharge pipe and the second delivery pipe.

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