Integrated sewage purification system and method

Abstract

The invention provides an integrated sewage purification system and method. The integrated sewage purification system comprises a pretreatment unit, a main body treatment unit, an advanced treatment unit and a sludge treatment unit. The pretreatment unit comprises a grating tank and an integration tank; the main body treatment unit comprises a plurality of purification treatment assemblies which are arranged in sequence, and each purification treatment assembly comprises a sewage circulating part, a sewage standing part and a connecting part. The connecting part comprises a driving assembly used for opening or closing an outlet of the sewage circulating part and a connecting pipe connected to the outlet and arranged in a zigzag mode, the sewage circulating part is provided with a water inlet pipeline communicated with the outlet of the integrated pool, the sewage standing part is provided with an outlet pipeline, and the outlet pipeline is connected with a pure water pipeline communicated with the deep treatment unit. A water injection pump is arranged on the sewage circulation part, a water return pipeline is arranged on the outlet pipeline, and a water injection pipeline is arranged between the water injection pump and the sewage circulation part. The defect of intermittent wastewater treatment in the prior art is avoided, and the treatment efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage purification, and in particular to an integrated sewage purification system. This example also relates to a method for purifying sewage using the integrated sewage purification system. Background Art

[0002] Most rural sewage is directly discharged after treatment. Traditional urban sewage treatment technology has high investment and operating costs, and urban sewage is collected in a centralized manner. Kitchen water in rural sewage contains oil and food residues. If it is discharged directly, it is easy to cause eutrophication of water bodies and algae in the water. In addition, since there is no complete sewage discharge network in rural areas, some sewage will flow into nearby rivers and ponds, causing water pollution.

[0003] The process flow of rural integrated sewage treatment equipment mainly includes the following stages: pretreatment, biological treatment, deep treatment, disinfection and sludge treatment. In the pretreatment stage, sewage first enters the screen pool, where large suspended particles such as paper and plastic are intercepted by the screen. Then it enters the regulating tank to adjust and balance the water quality and water volume, reducing the load impact of subsequent treatment units.

[0004] In the biological treatment stage, sewage enters the primary sedimentation tank for sedimentation to remove suspended solids and some organic matter, and then enters the biological reaction tank. The sewage enters the anaerobic tank. In the anaerobic environment, microorganisms decompose organic matter into small molecular organic matter and inorganic matter. Then the sewage enters the anoxic tank. In the anoxic environment, microorganisms further decompose small molecular organic matter into inorganic matter. Finally, the sewage enters the aerobic tank. In the aerobic environment, microorganisms completely oxidize and decompose organic matter into carbon dioxide and water. At the same time, nitrifying bacteria oxidize ammonia nitrogen into nitrates. Organic matter is decomposed into inorganic matter by the metabolism of microorganisms. The biological reaction tank usually adopts the activated sludge method or the biofilm method. Aerobic bacteria and anaerobic bacteria attach to the biofilm to oxidize and decompose organic matter.

[0005] In the prior art, there are a variety of methods for purifying sewage in the biological treatment stage, such as biochemical method, biological flocculation method, aerobic biological treatment method, anaerobic biological treatment method, activated sludge method, biofilm method and oxidation pond method.

[0006] Among them, the activated sludge method mainly uses a combination of biological reactions and physical and chemical reactions to treat sewage. The main process flow of this method includes water intake, mixing, aerobic aeration, sedimentation, waterproofing, and static stages. The existing SBR sewage treatment process is an improved method of the activated sludge method. It is widely used in the field of small and medium-sized water treatment and is suitable for rural sewage treatment conditions. However, due to its discontinuous water discharge, the treatment container is large and cannot be treated in real time with other continuous processes. In addition, sedimentation cannot be achieved at the same time during mixing and aerobic aeration, which causes the equipment to be idle for part of the time, resulting in low equipment utilization efficiency. Summary of the invention

[0007] In view of this, the present invention aims to propose an integrated sewage purification system that does not require a secondary sedimentation tank and a sludge return system, can be flexibly used in rural domestic sewage treatment, avoids the defects of discontinuous wastewater treatment in the prior art, and improves treatment efficiency.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows: An integrated sewage purification system includes a pretreatment unit, a main treatment unit, a deep treatment unit, and a sludge treatment unit; The pretreatment unit includes a grid pool and an integrated pool; The main treatment unit includes a plurality of purification treatment components arranged in sequence, wherein the purification treatment components include a sewage circulation part located at the upper part, a sewage static part located at the lower part, and a connecting part provided between the sewage circulation part and the sewage static part; The connecting part includes a driving assembly for opening or closing the outlet of the sewage circulation part, and a connecting pipe connected to the outlet in a zigzag arrangement; The sewage circulation part is provided with a water inlet pipeline connected to the outlet of the integrated pool, and the sewage static part is provided with an outlet pipeline, and the outlet pipeline is connected to a pure water pipeline connected to the deep treatment unit; The sewage circulation part is also provided with a water injection pump, and the outlet pipeline is provided with a return water pipeline connected with the water inlet of the water injection pump; A water injection pipeline is provided between the water injection pump and the sewage circulation part; The sludge treatment unit comprises a sedimentation tank and a sludge storage tank. The sedimentation tank is used to collect the debris of the pretreatment unit, and the sludge storage tank is used to collect the sludge generated by the sewage standing part.

[0009] Furthermore, the sewage circulation part includes an upper box body having a cavity, an inner cylinder arranged in the middle of the upper box body, and the inner cylinder is arranged in the cavity; The inner cylinder is formed with two upper sub-cavities and a lower sub-cavity spaced apart from each other from top to bottom; The cylinder body of the inner cylinder is located at the upper sub-chamber and is provided as a first mesh screen, and the cylinder body of the inner cylinder is located at the lower sub-chamber and is provided as a second mesh screen; The upper sub-chamber and the lower sub-chamber are both communicated with the cavity.

[0010] Furthermore, a water pump is provided above the upper box body, the inlet end of the water pump is connected to a water pumping pipe, the water pumping port of the water pumping pipe is arranged in the lower chamber, and the water outlet of the water pumping pipe is arranged in the upper chamber; An air injection pump is also provided above the inner cylinder, and the air injection pump is connected to an air injection pipe, which is inserted into the inner cylinder. The air injection pipe is respectively provided with a first air outlet located in the upper sub-chamber and a second air outlet located in the lower sub-chamber.

[0011] Furthermore, the sewage settling part includes a lower box body having an inner cavity, a primary settling tank arranged at the bottom of the inner cavity, a filtering channel arranged above the primary settling tank, and a final settling tank connected to the filtering channel; A circulation pump is arranged between the filtering channel and the final static pool, and the circulation pump and the circulation pipeline are provided with a device for adding a treatment agent.

[0012] Furthermore, a first water inlet connected to the connecting portion is provided at the upper end of the lower box, a second water inlet is provided on the primary static pool, and the first water inlet and the second water inlet are respectively provided on both sides of the length direction of the lower box; The filter channel is provided with an elbow corresponding to the upper part of the second water inlet, the filter channel is in a "7" shape, the two ends of the filter channel abut against the inner wall of the lower box, and the filter channel and the primary static pool form the ultimate static pool; One end of the filtration channel away from the elbow is provided with a notch communicating with the ultimate static pool.

[0013] Furthermore, the filtering channel includes a vertical section and a horizontal section connected vertically; the elbow is arranged on the vertical section; The vertical section is connected to the primary still tank, a buffer chamber is provided on a side of the horizontal section away from the vertical section, the buffer chamber is connected to the inlet of the circulation pump, and the buffer part is communicated with the ultimate still tank.

[0014] Furthermore, a first grid is provided at the elbow, a second grid is provided at the horizontal section, and a third grid is provided in the buffer chamber.

[0015] Furthermore, a constant pressure valve is provided on the elbow, and a pressure valve is provided on the horizontal section, and the pressure valve is used to adjust the water pressure of the horizontal section.

[0016] Furthermore, a scraper assembly is also provided in the primary static pool, and the scraper assembly includes a plurality of rotating shafts pivotally connected to the primary static pool, a driving part for driving one rotating shaft to rotate, and a transmission chain sleeved on the outer side of the rotating shaft; The transmission chain is provided with a plurality of vertical plates arranged at intervals; Along the length direction, one end of the primary static pool is provided with a downwardly recessed collection area; The driving unit drives the vertical plate to push the separated sludge to the collecting area, and the sludge in the collecting area is transported to the sludge treatment unit for treatment.

[0017] Compared with the prior art, the present invention has the following advantages: The integrated sewage purification system of the present invention screens out large particles and suspended solids in the collected rural domestic sewage by setting up a pretreatment unit, and provides relatively clean sewage for the main treatment unit by sedimentation, oil removal, and water quantity and quality adjustment in the integrated pool. By setting up an upper and lower integrated sewage circulation part and a sewage static part in the main treatment unit, and a connecting part arranged between the two, the sewage is aerated in the sewage circulation part to biodegrade organic matter and remove organic pollutants in the sewage. After the sewage treatment is completed, it is transported to the sewage static part through the connecting part for multi-stage sedimentation, and the supernatant is extracted. The supernatant is transported to the deep treatment unit for further treatment, and the sludge treatment unit collects and reprocesses the sludge obtained by precipitation in the pretreatment unit and the sewage static part.

[0018] The integrated sewage purification system of the present invention does not need to be equipped with a secondary sedimentation tank and a sludge return system, can be flexibly used in rural domestic sewage treatment, avoids the defects of discontinuous wastewater treatment in the prior art, and improves the treatment efficiency.

[0019] In addition, another object of the present invention is to provide a method for treating sewage using an integrated sewage purification system, which uses the integrated sewage purification system as described above and includes the following steps: Step 1: Pretreatment unit: After the sewage is passed through the screen tank to remove large particles and suspended solids, it is transported to the integrated tank for sedimentation, oil removal, and water quantity and quality adjustment to provide relatively clean sewage for the subsequent treatment stage; Step 2: The sewage pretreated in step 1 flows into the sewage circulation part through the water inlet pipe, biological fillers and aeration are placed in the sewage circulation part, and after a predetermined reaction time, the sewage is transported to the sewage static part through the connection part for sedimentation, and the upper clear water after sedimentation is returned to the sewage circulation part through the outlet pipe and the return pipe by the action of the water injection pump for secondary reaction, and the upper clear water flowing out of the outlet pipe after the secondary reaction is transported to the deep treatment unit; Step three, in the deep treatment unit, the sewage enters the filter tank, where the color, turbidity, odor and trace organic matter in the water are removed by activated carbon adsorption or ozone oxidation; Step 4: The water treated in step 3 is transported to a disinfection pool, and ultraviolet disinfection, greening or ozone treatment are used to kill bacteria and viruses in the water to ensure that the effluent is safe and harmless. The disinfected water is discharged into the environment through a discharge port. The discharge port needs to be equipped with online monitoring equipment to monitor the effluent water quality in real time to ensure that the discharge meets the standards; Step 5: Collect the debris in the screen pool and the integrated pool and put them into the sedimentation tank. Transport the sewage after standing in the sedimentation tank to the sludge storage tank. The sludge in the sludge storage tank needs to be properly treated. The treatment methods include sludge concentration, stabilization and dehydration. The treated sludge is convenient for storage and subsequent treatment for secondary utilization.

[0020] The method for treating sewage in the integrated sewage purification system of the present invention does not require the process of the primary sedimentation tank and the secondary sedimentation tank. The sewage treated by the pretreatment unit is subjected to the reaction treatment of the main treatment unit and the static treatment, and the filtered supernatant can be transported while being static, and the supernatant is transported to the sewage circulation part, which not only dilutes the sewage entering the sewage circulation part, but also plays a flushing role to avoid clogging of the sewage circulation part equipment. The supernatant water obtained by the secondary reaction can be directly discharged to the deep treatment unit for recycling or discharge.

[0021] At the same time, the sludge from the pretreatment unit and the sludge treatment unit is collected through the sludge treatment unit.

[0022] The integrated sewage purification system of the present invention reduces the equipment investment and process steps in the prior art, improves the treatment efficiency, and ensures that the effluent meets the discharge requirements by filtering twice in the main treatment unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings: Figure 1 A schematic diagram of an integrated sewage purification system according to an embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the purification treatment component according to an embodiment of the present invention; Figure 3 The figure is a flow chart of the integrated sewage purification system according to an embodiment of the present invention.

[0024] Description of reference numerals: 1. Pre-processing unit; 2. Main processing unit; 3. Deep processing unit; 101. Grid pool; 102. Integrated pool; 201, sewage circulation part; 202, sewage stationary part; 203, connection part; 204, water pump; 205, water pump pipe; 206, air injection pump; 207, air injection pipe; 2011, water inlet pipeline; 2012, water injection pump; 2013, water return pipeline; 2014, water injection pipeline; 2015, inner tube; 2016, upper box; 2017, upper sub-chamber; 2018, lower sub-chamber; 2021, outlet pipeline; 2022, pure water pipeline; 2023, lower box; 2024, primary static pool; 2025, filtration channel; 2026, ultimate static pool; 2027, circulation pump; 2028, first water inlet; 2029, second water inlet; 2030, elbow; 2031, notch; 2032, buffer chamber; 2033, first grille; 2034, second grille; 2035, third grille; 2036, constant pressure valve; 2037, pressure valve; 2038, scraper assembly; 2039, collection area; 2031, driving assembly; 2032, connecting pipe; Water inlet; 2052, water outlet; The first air outlet; 2072, the second air outlet. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installed", "connected", "connected", and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] This embodiment relates to an integrated sewage purification system, which includes a pretreatment unit 1, a main treatment unit 2, a deep treatment unit 3, and a sludge treatment unit. The pretreatment unit 1 includes a grid tank 101 and an integrated tank 102. The main treatment unit 2 includes a plurality of purification treatment components arranged in sequence, and the purification treatment components include a sewage circulation part 201 located at the upper part, a sewage static part 202 located at the lower part, and a connecting part 203 provided between the sewage circulation part 201 and the sewage static part 202.

[0030] The connection part 203 includes a driving assembly 2031 for opening or closing the outlet of the sewage circulation part 201, and a connecting pipe 2032 connected to the outlet in a zigzag arrangement. The sewage circulation part 201 is provided with a water inlet pipeline 2011 connected to the outlet of the integrated pool 102, and the sewage static part 202 is provided with an outlet pipeline 2021, and the outlet pipeline 2021 is connected with a pure water pipeline 2022 connected to the deep treatment unit 3. The sewage circulation part 201 is also provided with a water injection pump 2012, and the outlet pipeline 2021 is provided with a return water pipeline 2013 connected to the water inlet of the water injection pump 2012. A water injection pipeline 2014 is provided between the water injection pump 2012 and the sewage circulation part 201. The sludge treatment unit includes a sedimentation tank and a sludge storage tank, the sedimentation tank is used to collect debris from the pretreatment unit 1, and the sludge storage tank is used to collect sludge generated by the sewage static part 202.

[0031] The integrated sewage purification system described in this embodiment screens out large particles and suspended solids in the collected rural domestic sewage by setting up a pretreatment unit 1, and provides relatively clean sewage for the main treatment unit 2 by settling, removing oil, and adjusting the water quantity and quality in the integrated pool 102. By setting the sewage circulation part 201 and the sewage static part 202 integrated up and down in the main treatment unit 2, and the connecting part 203 arranged between the two, the sewage is aerated in the sewage circulation part 201, so that the organic matter is biodegraded and the organic pollutants in the sewage are removed. After the sewage treatment is completed, it is transported to the sewage static part 202 through the connecting part 203 for multi-stage precipitation, and the supernatant is extracted. The supernatant is transported to the deep treatment unit 3 for further treatment, and the sludge treatment unit collects and reprocesses the sludge obtained by precipitation in the pretreatment unit 1 and the sewage static part 202. In addition, the system does not need to set up a secondary sedimentation tank and a sludge return system, can be flexibly used in rural domestic sewage treatment, and avoids the defects of discontinuous wastewater treatment in the prior art, thereby improving the treatment efficiency.

[0032] Based on the above overall introduction, the exemplary structure of the integrated sewage purification system of this embodiment is as follows: Figures 1 to 3As shown, the sewage circulation part 201 includes an upper box body 2016 having a cavity, an inner cylinder 2015 disposed in the middle of the upper box body 2016, and the inner cylinder 2015 is disposed in the cavity. The inner cylinder 2015 is formed with two upper sub-cavities 2017 and a lower sub-cavity 2018 spaced from top to bottom. The cylinder body of the inner cylinder 2015 is located at the upper sub-cavity 2017 and is provided with a first mesh screen, and the cylinder body of the inner cylinder 2015 is located at the lower sub-cavity 2018 and is provided with a second mesh screen, and both the upper sub-cavity 2017 and the lower sub-cavity 2018 are connected to the cavity.

[0033] like Figure 2 As shown, by providing an inner cylinder 2015, an upper chamber 2017 and a lower chamber 2018, when the pump 204 is running, the sewage in the lower chamber 2018 is pumped into the upper chamber 2017, and flows through the first mesh screen to the outside of the inner cylinder 2015, and the water flows through the second mesh screen into the lower chamber 2018, so that the circulation of sewage is formed, and aeration is provided in the lower chamber 2018 and the upper chamber 2017, so that the aeration can interact with the circulating water flow to increase the friction between the water flow and the air, which can not only carry organic matter to the upper side through the air to achieve the effect of organic matter separation, but also further improve the reaction effect in the cavity, effectively achieve the removal of pollutants such as organic matter, ammonia nitrogen, total phosphorus in rural sewage, so that the effluent meets the national emission standards or recycling standards.

[0034] Biological agents such as biopromoters and biodetoxifiers are placed in the cavity to enhance the activity and biodiversity of activated sludge, thereby improving the effluent quality and the system's ability to resist shocks. For example, after adding biopromoters and biodetoxifiers, the effluent suspended solids (SS) can be controlled below 150 mg / L, the chemical oxygen demand (COD) removal rate is increased by an average of 3%, and the ammonia nitrogen removal rate is increased by an average of 2%. These biological agents help degrade pollutants by providing nutrients and promoting microbial growth, thereby improving the treatment effect of the system.

[0035] In order to improve the processing efficiency, the main processing unit 2 of this embodiment is sequentially provided with three parallel purification processing components, the inlet of each purification processing component is connected to the same water inlet pipeline 2011, each purification processing component is respectively provided with a separate outlet pipeline 2021 and return water pipeline 2013, and the three pure water pipelines 2022 are all connected to the inlet of the deep processing unit 3. In actual production, the number of purification processing components can be increased or decreased according to actual needs, or different numbers of purification processing components can be enabled by setting a stop valve to meet the sewage treatment needs of different capacities. This embodiment optimizes the water inlet and drainage system, so that the flow of wastewater in the reactor is more uniform, and the mixing effect and processing capacity of the reactor are improved.

[0036] The system introduces a more advanced automatic control system to achieve real-time monitoring and adjustment of various indicators in the reactor. By accurately controlling reaction conditions such as dissolved oxygen, pH value, temperature, etc., the stability and efficiency of the wastewater treatment process are ensured. In addition, new biological fillers with efficient biological attachment and growth capabilities are used in the purification treatment components to increase the biomass in the reactor and improve the biological activity of wastewater treatment.

[0037] Preferably, still as Figure 1 to Figure 2 As shown, a water pump 204 is provided above the upper box body 2016, and a water pump pipe 205 is connected to the inlet end of the water pump 204, and a water pump port 2051 of the water pump pipe 205 is arranged in the lower chamber 2018, and a water outlet 2052 of the water pump pipe 205 is arranged in the upper chamber 2017. An air injection pump 206 is also provided above the inner cylinder 2015, and the air injection pump 206 is connected to an air injection pipe 207, and the air injection pipe 207 is inserted into the inner cylinder 2015, and the air injection pipe 207 is respectively provided with a first air outlet 2071 located in the upper chamber 2017, and a second air outlet 2072 arranged in the lower chamber 2018. Figure 2 As shown, the driving component 2031 of this embodiment includes a telescopic cylinder and a telescopic plate arranged on the telescopic cylinder. The telescopic plate is provided with a flow port. When the flow port corresponds to the outlet of the upper box 2016, water is released. When the flow port is staggered with the outlet, the telescopic plate blocks the flow port, and a reaction is carried out at this time.

[0038] In addition, Figure 1 to Figure 2 As shown, the sewage settling part 202 includes a lower box 2023 with an inner cavity, a primary settling tank 2024 arranged at the bottom of the inner cavity, a filtering channel 2025 arranged above the primary settling tank 2024, and a final settling tank 2026 connected to the filtering channel 2025. A circulation pump 2027 is arranged between the filtering channel 2025 and the final settling tank 2026, and the circulation pump 2027 and a circulation pipeline are provided on the circulation pipeline, and a circuit for adding a treatment agent is provided.

[0039] Furthermore, a first water inlet 2028 communicating with the connecting portion 203 is provided at the upper end of the lower box 2023, a second water inlet 2029 is provided on the primary still pool 2024, and the first water inlet 2028 and the second water inlet 2029 are respectively provided on both sides of the length direction of the lower box 2023. An elbow 2030 corresponding to the upper part of the second water inlet 2029 is provided on the filter channel 2025, and the filter channel 2025 is in a "7" shape, with both ends of the filter channel 2025 abutting against the inner wall of the lower box 2023, and the filter channel 2025 and the primary still pool 2024 enclose a final still pool 2026. A notch 2031 communicating with the final still pool 2026 is provided at one end of the filter channel 2025 away from the elbow 2030.

[0040] Preferably, still as Figure 1 to Figure 2As shown, the filtration channel 2025 includes a vertical section and a horizontal section that are vertically connected; the elbow 2030 is arranged on the vertical section, the vertical section is connected to the primary stilling tank 2024, and a buffer chamber 2032 is provided on the side of the horizontal section away from the vertical section, the buffer chamber 2032 is connected to the inlet of the circulation pump 2027, and the buffer part is connected to the ultimate stilling tank 2026.

[0041] Preferably, a first grid 2033 is provided at the elbow 2030, a second grid 2034 is provided at the horizontal section, and a third grid 2035 is provided in the buffer chamber 2032. The mesh sizes of the first grid 2033, the second grid 2034 and the third grid 2035 of this embodiment gradually decrease, and the sewage enters the sewage circulation channel formed by the filter channel 2025 and the lower box 2023 through the first water inlet 2028, and the sewage flows into the primary still tank 2024 through the channel and the second water inlet 2029. The supernatant after standing in the primary still tank 2024 enters the filter channel 2025 through the elbow 2030. In specific implementation, the water injection pump 2012 reduces the pressure of the outlet pipe by pumping water, thereby promoting the flow of sewage into the final still tank 2026.

[0042] Furthermore, if Figure 2 As shown, a constant pressure valve 2036 is provided on the elbow 2030, and a pressure valve 2037 is provided on the horizontal section. The pressure valve 2037 is used to adjust the water pressure of the horizontal section. The constant pressure valve 2036 is provided on the elbow 2030 to ensure that the pressure of the sewage entering the filter channel 2025 is stable, thereby preventing the sediment entering the primary static tank 2024 from being agitated due to the extraction of the supernatant, thereby improving the cleanliness of the water quality in the filter channel 2025. And by providing the pressure valve 2037, it is ensured that the pressure of the filter channel 2025 reaches a preset pressure value before the sewage is transported to the ultimate static tank 2026.

[0043] like Figure 2 As shown, this embodiment is also provided with a circulation pump 2027. The water injection pump 2012 is turned off and the circulation pump 2027 is turned on to stir the sewage in the final static tank 2026 so that the small-sized suspended matter in the sewage can be aggregated and concentrated, and then the suspended matter in the final static tank 2026 is chemically precipitated by being physically static. In this embodiment, the return water pipeline 2013 and the pure water pipeline 2022 are respectively provided with stop valves. When the circulation pump 2027 is turned on, the stop valve of the pure water pipeline 2022 is closed. When the sewage is filtered and static twice or multiple times and circulates again through the water injection pipeline 2014, the sewage flowing into the final static tank 2026 can gradually remove the process of the circulation pump 2027, and the supernatant is directly collected after the sewage passes through the third grid 2035. In this embodiment, an extraction pump is provided on the pure water pipeline 2022 to extract the supernatant.

[0044] Furthermore, a scraper assembly 2038 is also provided in the primary still tank 2024. The scraper assembly 2038 includes a plurality of rotating shafts pivotally connected to the primary still tank 2024, a driving unit driving one of the rotating shafts to rotate, and a transmission chain sleeved on the outer side of the rotating shaft, on which a plurality of vertical plates arranged at intervals are provided. Along the length direction, a downwardly concave collection area 2039 is provided at one end of the primary still tank 2024. The driving unit drives the vertical plates to push the separated sludge to the collection area 2039, and the sludge in the collection area 2039 is transported to the sludge treatment unit for treatment.

[0045] This embodiment also relates to a method for treating sewage using an integrated sewage purification system, which uses the integrated sewage purification system as described above and includes the following steps: Step 1, pretreatment unit 1, after the sewage passes through the grid pool 101 to remove large particles and suspended matter in the sewage, it is then transported to the integrated pool 102 for sedimentation, oil removal and water quantity and quality adjustment to provide relatively clean sewage for the subsequent treatment stage; Step 2: The sewage pretreated in step 1 flows into the sewage circulation part 201 through the water inlet pipe 2011. Biological fillers and aeration are placed in the sewage circulation part 201. After a predetermined reaction time, the sewage is transported to the sewage static part 202 through the connection part 203 for sedimentation. The upper clear water after sedimentation is returned to the sewage circulation part 201 through the outlet pipe 2021 and the return pipe 2013 by the action of the water injection pump 2012 for secondary reaction. After the secondary reaction, the upper clear water flowing out of the outlet pipe 2021 is transported to the deep treatment unit 3. Step 3, deep treatment unit 3, the sewage enters the filter tank, activated carbon adsorption or ozone oxidation to remove the color, turbidity, odor and trace organic matter in the water; Step 4: The water treated in step 3 is transported to a disinfection pool, and ultraviolet disinfection, greening or ozone treatment are used to kill bacteria and viruses in the water to ensure that the effluent is safe and harmless. The disinfected water is discharged into the environment through a discharge port. The discharge port needs to be equipped with online monitoring equipment to monitor the effluent water quality in real time to ensure that the discharge meets the standards; Step 5: collect the debris in the grille tank 101 and the integrated tank 102 and put them into the sedimentation tank, and transport the sewage after standing in the sedimentation tank to the sludge storage tank. The sludge in the sludge storage tank needs to be properly treated. The treatment methods include sludge concentration, stabilization and dehydration. The treated sludge is convenient for storage and subsequent treatment for secondary utilization.

[0046] For the rural sewage treatment pipe network, the following arrangements are required: It is recommended that the existing combined sewer pipes be used as rainwater pipes and new sewage pipe networks be built. Because the existing combined sewer pipes are generally larger in diameter or have an imperfect cover channel system without waterproofing, it is recommended to use them as rainwater pipes. If the pipe network recently built in a local area is relatively complete, with a smaller pipe diameter, and there is no or very little rainwater inflow, the pipe network can be used on the premise that the elevation flow direction is met, and there is no need to repeat the construction of a new sewage pipe network, which can reduce investment and protect the normal life of local residents.

[0047] It is recommended to adopt a complete diversion system for newly built pipe networks. The interception system may be appropriately considered in the following special circumstances: ① prosperous residential areas with concentrated population and road width less than 3 m; ② newly built residential areas or beautiful villages with high road construction specifications, where the government and residents are unwilling to repeat construction. The scale of the sewage treatment plant should take this part of the water volume into consideration during the design.

[0048] Each household in villages and towns has many sewage outlets, mainly domestic sewage from washing, bathing, kitchen, toilet, etc. In some areas, there are still dry toilets. It is recommended that the government first carry out indoor renovations and build septic tanks in a unified manner, and try to discharge the sewage from each household into one place, and finally merge it into the municipal sewage network to avoid the situation where no water is collected or the amount of water collected is small during later operation.

[0049] When designing the main network, the setting of inverted siphon wells and pump stations should be comprehensively considered. Generally, inverted siphon wells and pump stations are buried deep and large in size. They should be kept away from busy streets and residential areas to avoid difficulties in site selection during later construction and affect the normal life of residents.

[0050] Scientifically predict water volume. The actual situation of villages and towns should be taken into consideration, and the proportion of dry toilets should be investigated on site. The water quota should be selected based on the actual situation to avoid large design errors. There are many migrant workers in villages and towns. Usually, there are only elderly people and children in villages and towns, but there are more people on holidays. Therefore, changes in water volume should be considered during design. When designing, the route should be considered comprehensively to minimize crossing rivers, ditches, railways, highways, etc. When designing the pipeline network, the main pipes, main pipes, and branch pipes should be designed and constructed in a unified manner to avoid separate designs due to investment and other factors, which will lead to incoherent designs, repeated construction that damages the road surface, and affects the actual effect.

[0051] The method for treating sewage in the integrated sewage purification system of this embodiment does not require the process of the primary sedimentation tank and the secondary sedimentation tank. The sewage treated by the pretreatment unit 1 is subjected to the reaction treatment of the main treatment unit 2, and the static treatment can be realized while the filtered supernatant is transported while static, and the supernatant is transported to the sewage circulation part 201, which not only dilutes the sewage entering the sewage circulation part 201, but also plays a flushing role to avoid clogging of the sewage circulation part 201 equipment. The supernatant water obtained by the secondary reaction can be directly discharged to the deep treatment unit 3 for recycling or discharge. At the same time, the sludge of the pretreatment unit 1 and the sludge treatment unit is collected by the sludge treatment unit.

[0052] The method for treating sewage by the integrated sewage purification system of this embodiment reduces the investment in equipment and processes in the prior art, thereby improving the treatment efficiency. In addition, by filtering twice in the main treatment unit 2, it is ensured that the effluent meets the discharge requirements. The purification method of this embodiment can still maintain stable operation in the face of large fluctuations in the quality and amount of the influent water, thereby ensuring the continuity of wastewater treatment.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated sewage purification system, characterized in that: It comprises a pretreatment unit (1), a main treatment unit (2), a deep treatment unit (3), and a sludge treatment unit; The pretreatment unit (1) comprises a grid pool (101) and an integration pool (102); The main treatment unit (2) comprises a plurality of purification treatment components arranged in sequence, wherein the purification treatment components comprise a sewage circulation portion (201) located at the upper portion, a sewage static portion (202) located at the lower portion, and a connection portion (203) provided between the sewage circulation portion (201) and the sewage static portion (202); The connecting part (203) comprises a driving assembly (2031) for opening or closing the outlet of the sewage circulation part (201), and a connecting pipe (2032) connected to the outlet in a zigzag arrangement; The sewage circulation section (201) is provided with a water inlet pipeline (211) connected to the outlet of the integrated pool (102), and the sewage static section (202) is provided with an outlet pipeline (221), and the outlet pipeline (221) is connected to a pure water pipeline (222) connected to the deep treatment unit (3); The sewage circulation part (201) is also provided with a water injection pump (2012), and the outlet pipeline (221) is provided with a water return pipeline (2013) connected to the water inlet of the water injection pump (2012); A water injection pipeline (2014) is provided between the water injection pump (2012) and the sewage circulation unit (201); The sludge treatment unit comprises a sedimentation tank and a sludge storage tank, the sedimentation tank is used to collect debris from the pretreatment unit (1), and the sludge storage tank is used to collect sludge generated by the sewage settling part (202).

2. The integrated sewage purification system according to claim 1, characterized in that: The sewage circulation part (201) comprises an upper box body (2016) having a cavity, an inner cylinder (2015) arranged in the middle of the upper box body (2016), and the inner cylinder (2015) is arranged in the cavity; The inner cylinder (2015) is formed with two upper sub-cavities (2017) and a lower sub-cavity (2018) arranged at intervals from top to bottom; The cylinder body of the inner cylinder (2015) is located at the upper sub-chamber (2017) and is configured as a first mesh screen, and the cylinder body of the inner cylinder (2015) is located at the lower sub-chamber (2018) and is configured as a second mesh screen; The upper sub-chamber (2017) and the lower sub-chamber (2018) are both connected to the cavity.

3. The integrated sewage purification system according to claim 2, characterized in that: A water pump (204) is provided above the upper box body (2016); the inlet end of the water pump (204) is connected to a water pump pipe (205); a water pump port (2051) of the water pump pipe (205) is arranged in the lower chamber (2018); and a water outlet (2052) of the water pump pipe (205) is arranged in the upper chamber (2017); An air injection pump (206) is also provided above the inner cylinder (2015); the air injection pump (206) is connected to an air injection pipe (207); the air injection pipe (207) is inserted into the inner cylinder (2015); and the air injection pipe (207) is provided with a first air outlet (2071) located in the upper sub-chamber (2017) and a second air outlet (2072) located in the lower sub-chamber (2018).

4. The integrated sewage purification system according to claim 3, characterized in that: The sewage settling part (202) comprises a lower box (2023) having an inner cavity, a primary settling pool (2024) arranged at the bottom of the inner cavity, a filtering channel (2025) arranged above the primary settling pool (2024), and a final settling pool (2026) connected to the filtering channel (2025); A circulation pump (2027) is provided between the filtration channel (2025) and the ultimate static pool (2026), and the circulation pump (2027) and a circulation pipeline are provided on the circulation pipeline, wherein a device for adding a treatment agent is provided.

5. The integrated sewage purification system according to claim 4, characterized in that: A first water inlet (2028) in communication with the connecting portion (203) is provided at the upper end of the lower box body (2023); a second water inlet (2029) is provided on the primary static pool (2024); the first water inlet (2028) and the second water inlet (2029) are respectively provided on two sides of the length direction of the lower box body (2023); The filter channel (2025) is provided with an elbow (2030) corresponding to the upper side of the second water inlet (2029); the filter channel (2025) is in the shape of a letter "7", and both ends of the filter channel (2025) abut against the inner wall of the lower box (2023); the filter channel (2025) and the primary still pool (2024) form the final still pool (2026); An end of the filtration channel (2025) away from the elbow (2030) is provided with a notch (2031) that is in communication with the ultimate static pool (2026).

6. The integrated sewage purification system according to claim 5, characterized in that: The filtering channel (2025) comprises a vertical section and a horizontal section which are vertically connected; the elbow (2030) is arranged on the vertical section; The vertical section is connected to the primary still pool (2024), and a buffer chamber (2032) is provided on the side of the horizontal section away from the vertical section. The buffer chamber (2032) is connected to the inlet of the circulation pump (2027), and the buffer portion is in communication with the ultimate still pool (2026).

7. The integrated sewage purification system according to claim 6, characterized in that: A first grid (2033) is provided at the elbow (2030), a second grid (2034) is provided at the horizontal section, and a third grid (2035) is provided in the buffer chamber (2032).

8. The integrated sewage purification system according to claim 7, characterized in that: The elbow (2030) is provided with a constant pressure valve (2036), and the horizontal section is provided with a pressure valve (2037), and the pressure valve (2037) is used to adjust the water pressure of the horizontal section.

9. The integrated sewage purification system according to claim 3, characterized in that: A scraper assembly (2038) is also provided in the primary still pool (2024), and the scraper assembly (2038) comprises a plurality of rotating shafts pivotally connected to the primary still pool (2024), a driving unit driving one of the rotating shafts to rotate, and a transmission chain sleeved on the outside of the rotating shaft; The transmission chain is provided with a plurality of vertical plates arranged at intervals; Along the length direction, one end of the primary static pool (2024) is provided with a downwardly recessed collection area (2039); The driving unit drives the vertical plate to push the separated sludge to the collection area (2039), and the sludge in the collection area (2039) is transported to the sludge treatment unit for treatment.

10. An integrated sewage purification method, characterized in that: The integrated sewage purification system according to any one of claims 1 to 9 comprises the following steps: Step 1, pretreatment unit (1), after the sewage passes through the grid pool (101) to remove large particles and suspended matter in the sewage, it is then transported to the integration pool (102) for sedimentation, oil removal, and water volume and water quality adjustment, so as to provide relatively clean sewage for the subsequent treatment stage; Step 2, the sewage pretreated in step 1 flows into the sewage circulation part (201) through the water inlet pipe (211), biological fillers and aeration are placed in the sewage circulation part (201), and after a predetermined reaction time, the sewage is transported to the sewage static part (202) through the connection part (203) for sedimentation, and the upper clear water after sedimentation is returned to the sewage circulation part (201) through the outlet pipe (221) and the return pipe (2013) by the action of the water injection pump (2012) to react again, and the upper clear water flowing out of the outlet pipe (221) after the secondary reaction is transported to the deep treatment unit (3); Step three, deep treatment unit (3), the sewage enters the filter tank, activated carbon adsorption or ozone oxidation to remove the color, turbidity, odor and trace organic matter in the water; Step 4: The water treated in step 3 is transported to a disinfection pool, and ultraviolet disinfection, greening or ozone treatment are used to kill bacteria and viruses in the water to ensure that the effluent is safe and harmless. The disinfected water is discharged into the environment through a discharge port. The discharge port needs to be equipped with online monitoring equipment to monitor the effluent water quality in real time to ensure that the discharge meets the standards; Step 5: collect the debris in the screen tank (101) and the integrated tank (102) and put them into the sedimentation tank, and transport the sewage after standing in the sedimentation tank to the sludge storage tank. The sludge in the sludge storage tank needs to be properly treated. The treatment methods include sludge concentration, stabilization and dehydration. The treated sludge is convenient for storage and subsequent treatment for secondary utilization.

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