A system for adjusting and storing initial rain of reclaimed water based on quality-based treatment

Abstract

This utility model belongs to the field of wastewater treatment technology and discloses a first-flush rainwater storage tank system for reclaimed water based on differentiated treatment. It includes an integrated tank body and an intelligent monitoring and control device. The integrated tank body is divided into interconnected grid channels, peak shaving and storage areas, pretreatment areas, deep treatment areas, disinfection areas, and reclaimed water reuse areas by partition walls. This utility model improves treatment efficiency by 40%-50% through efficient graded treatment and differentiated flow, achieving effluent that meets urban wastewater reuse standards. Intelligent peak shaving and storage reduces peak flow from heavy rainstorms by more than 30%, reducing the risk of urban flooding. Full-process automation saves 30% on chemical energy consumption. Technologies such as ultra-nano-oxygenation reduce energy consumption by 30%-60% compared to traditional processes, and ultraviolet disinfection consumes no chemicals. Modular design supports flexible expansion and replacement, adapts to multiple water quality standards, reduces operation and maintenance costs by 50%, and integrated design saves 40% on land area and construction costs, achieving efficient, energy-saving, intelligent, and flexible wastewater treatment and resource utilization.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to a rainwater storage tank system for reuse of recycled water based on differentiated treatment. Background Technology

[0002] In the field of urban stormwater management and water resource recycling, initial stormwater pollution control, peak storm flow regulation, and efficient greywater reuse are key technological challenges that urgently need to be addressed. Existing technologies have significant shortcomings in system integration, processing accuracy, and resource utilization efficiency, specifically as follows:

[0003] I. Deficiencies in Initial Rainwater Pollution Control Technology

[0004] Initial rainwater carries pollutants such as road surface oil, heavy metals, and suspended solids (COD often exceeds 100 mg / L, SS > 200 mg / L), making it a major carrier of urban non-point source pollution. However, traditional interception facilities (such as intercepting wells) rely on a fixed interception ratio design, which can only cope with normal rainfall conditions. Under the impact of sudden large-volume storm surges, highly polluted initial rainwater is prone to overflow and direct discharge due to insufficient interception capacity, leading to ecological problems such as eutrophication and heavy metal accumulation in receiving water bodies. At the same time, existing interception equipment lacks real-time monitoring and dynamic response mechanisms for water quality, making it impossible to achieve precise interception based on differences in pollutant concentrations, thus making it difficult to guarantee the effectiveness of initial rainwater pollution control.

[0005] Second, water storage tanks have limited functionality and high operation and maintenance costs.

[0006] Traditional rainwater storage tanks are primarily used for temporary rainwater storage, with their function limited to "peak shaving and valley filling." They lack effective integration with greywater reuse systems, resulting in the failure to utilize the stored rainwater as a resource, thus contradicting the water resource recycling goals of water-saving city construction. Furthermore, the technology for cleaning sediment from inside the storage tanks is outdated, relying on manual or extensive flushing, leading to low cleaning efficiency, high risk of secondary pollution, and rapid depletion of storage capacity. Over long-term operation, the accumulation of silt at the bottom of the tanks not only affects storage capacity but also exacerbates the load on subsequent treatment systems (e.g., COD degradation energy consumption increases by 20%-30%), resulting in a significant increase in operation and maintenance costs.

[0007] III. Insufficient Coordination Between Reclaimed Water Reuse and Storage Systems

[0008] Existing greywater treatment facilities and rainwater storage tanks are mostly constructed independently, lacking coordinated design in terms of spatial layout, treatment processes, and control logic. This leads to redundant investment in equipment (such as independently configuring aeration and disinfection devices), redundant piping systems, and wasted land resources (occupying 30%-40% more land than integrated designs). Under the separate construction model, the two systems cannot dynamically adjust the operating parameters of the treatment units according to changes in the water level and water quality of the storage tanks, easily resulting in equipment idleness or overload, low overall system energy efficiency (such as a chemical waste rate of over 25%), and difficulty in meeting the construction needs of urban areas with limited land.

[0009] IV. The processing flow lacks dynamic quality control capabilities.

[0010] There are significant differences in pollution load between initial and secondary rainwater runoff (COD in secondary rainwater can be reduced to below 50 mg / L and SS ≤ 50 mg / L), but existing treatment systems lack intelligent switching mechanisms based on water quality thresholds, leading to widespread mixed treatment of highly polluted initial rainwater and low-pollution secondary rainwater. This mixed treatment results in uneven load distribution across treatment units (e.g., premature saturation and failure of phosphorus removal packing layers), waste of chemicals and energy (consuming more than 30% more than separate treatment), and significant fluctuations in effluent quality, making it difficult to consistently meet the reuse requirements for greening and landscape water replenishment as stipulated in the "Standard for Reuse of Urban Wastewater" (GB / T18920).

[0011] With the deepening of the "sponge city" construction and the intensification of water shortage problems, the shortcomings of existing technologies in initial rainwater pollution control, integrated regulation and reuse, and intelligent differentiated treatment are becoming increasingly apparent. How to provide an integrated system that combines efficient interception of sewage, intelligent regulation and storage, differentiated treatment, and resource reuse has become an urgent technical challenge to be solved in the field of municipal engineering. Utility Model Content

[0012] In view of this, the purpose of this utility model is to provide a rainwater storage tank system for reuse of recycled water based on separate treatment, so as to solve the problems existing in the prior art.

[0013] To achieve the above objectives, the present invention adopts the following technical solution:

[0014] A rainwater storage tank system for reclaimed water reuse based on differentiated treatment includes an integrated tank body and an intelligent monitoring and control device. The integrated tank body is internally divided into interconnected sections: a bar screen channel, a peak shaving and storage area, a pretreatment area, a deep treatment area, a disinfection area, and a reclaimed water reuse area, by partition walls. The bar screen channel is located in the middle of the integrated tank body, the peak shaving and storage area is located on one side of the long side of the bar screen channel, and the pretreatment area, the deep treatment area, the disinfection area, and the reclaimed water reuse area are located on the other side of the long side of the bar screen channel along the water flow direction.

[0015] The two ends of the grid channel are respectively equipped with sewage inlet pipe and flood discharge pipe. The two inner walls with opposite long sides and close to the flood discharge pipe are respectively equipped with a greywater flow restriction gate and a storage flow restriction gate. The grid channel is connected to the peak shaving and storage area and the pretreatment area through the greywater flow restriction gate and the storage flow restriction gate respectively. The pretreatment area is equipped with an ultra-nano dissolved oxygenation device.

[0016] A coarse screen and a fine screen are sequentially installed along the water flow direction in the screen channel and near the sewage inlet pipe. The coarse screen and the fine screen are located in an independent space in the screen channel separated by a partition wall.

[0017] Water control gates are installed on the surface of the partition wall of the independent space, at the sewage inlet pipe, and at the flood discharge pipe.

[0018] In a preferred embodiment of this utility model, the peak shaving and storage area is divided into multiple storage tanks parallel to the grid channel by partition walls. Each storage tank is interconnected, and each tank is equipped with a gate flushing device at its upstream end and a storage drainage pump at the lowest point of its downstream section. The output end of the storage drainage pump extends out of the integrated tank body through a pipe, and the sludge deposited in the peak shaving and storage area is pumped out of the integrated tank body by the storage drainage pump.

[0019] In a preferred embodiment of this utility model, a shredding grid is provided on the inner wall of the pretreatment zone and at the location corresponding to the greywater flow restriction gate, through which garbage from the grid channel is shredded.

[0020] In a preferred embodiment of this utility model, the ultra-nano dissolved aerobic reoxygenation device includes a reoxygenation host, which is disposed outside the integrated pool body. The input end of the reoxygenation host is connected to one end of the reoxygenation inlet pipe, and the other end of the reoxygenation inlet pipe extends into the greywater reuse area. The output end of the reoxygenation host is connected to one end of the reoxygenation outlet pipe, and the other end of the reoxygenation outlet pipe extends into the pretreatment area and is provided with a release device.

[0021] In a preferred embodiment of this utility model, the deep treatment zone is arranged into two packing zones in the direction of water flow, and the two packing zones are filled with phosphorus removal packing and nitrogen reduction packing in the direction of water flow.

[0022] In a preferred embodiment of this utility model, multiple ultraviolet disinfection modules are evenly arranged in the disinfection zone.

[0023] In a preferred embodiment of this utility model, a greywater reuse pump is provided in the greywater reuse area, and the output end of the greywater reuse pump extends out of the integrated pool body through a pipe;

[0024] The greywater reuse area is equipped with automatic water quality monitoring equipment, which is located outside the integrated water tank and has its collection pipe extending into the greywater reuse area.

[0025] In a preferred embodiment of this utility model, the intelligent monitoring and control device includes a waterproof camera, an ultrasonic level gauge, a COD water quality analyzer, and an intelligent control cabinet. The waterproof camera and the ultrasonic level gauge are installed on the inner wall of both the peak shaving and storage area and the bar screen channel. The COD water quality analyzer is also installed on the inner wall of the bar screen channel. Only the ultrasonic level gauge is installed on the inner wall of the reclaimed water reuse area. The intelligent control cabinet is electrically connected to the waterproof camera, the ultrasonic level gauge, and the COD water quality analyzer via wires.

[0026] In a preferred embodiment of this utility model, the intelligent control cabinet is electrically connected to the water control gate, the coarse screen, the fine screen, the pulverizing screen, the greywater flow limiting gate, the storage flow limiting gate, the storage drain pump, the gate flushing device, the ultraviolet disinfection module, the greywater reuse pump, the ultra-nano dissolved oxygenation device, and the automatic water quality monitoring device via wires.

[0027] In a preferred embodiment of this utility model, the peak shaving and storage area of ​​the integrated pool is buried deep underground, while the remaining areas are buried deep underground or located above ground; the reoxygenation unit, the intelligent control cabinet, and the automatic water quality monitoring equipment are located above ground.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This utility model improves treatment efficiency by 40%-50% through efficient graded treatment and differentiated flow, achieving effluent that meets urban wastewater reuse standards; intelligent regulation and peak shaving reduce peak flow during rainstorms by more than 30%, lowering the risk of urban flooding; full-process automation saves 30% on chemical energy consumption; ultra-nano reoxygenation and other technologies reduce energy consumption by 30%-60% compared to traditional processes; ultraviolet disinfection consumes no chemicals; modular design supports flexible expansion and replacement, adapts to multiple water quality standards, reduces operation and maintenance costs by 50%, and integrated design saves 40% on land use and construction costs, achieving efficient, energy-saving, intelligent, and flexible wastewater treatment and resource utilization. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall planar structure of this utility model;

[0031] Figure 2 This is the control flowchart of this utility model.

[0032] In the diagram: 100. Integrated pool; 1. Bar screen channel; 11. Sewage inlet pipe; 12. Water control gate; 13. Coarse bar screen; 14. Fine bar screen; 15. Crushing bar screen; 16. Flood discharge pipe; 17. Reclaimed water flow restriction gate; 18. Storage flow restriction gate; 2. Peak shaving and storage area; 21. Storage and emptying pump; 22. Portal flushing equipment; 3. Pretreatment area; 4. Deep treatment area; 41. Phosphorus removal packing; 42. Nitrogen reduction packing; 5. Disinfection area; 51. Ultraviolet disinfection module; 6. Reclaimed water reuse area; 61. Reclaimed water reuse pump; 7. Ultra-nano dissolved oxygenation equipment; 71. Release device; 72. Oxygenation outlet pipe; 73. Oxygenation main unit; 74. Oxygenation inlet pipe; 8. Automatic water quality monitoring equipment; 9. Intelligent monitoring and control device; 91. Waterproof camera; 92. Ultrasonic level gauge; 93. COD water quality analyzer; 94. Intelligent control cabinet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] Please refer to Figure 1-2 As shown, an embodiment of this application provides a rainwater storage tank system for reuse of recycled water based on differentiated treatment, including an integrated tank body 100 and an intelligent monitoring and control device 9. The integrated tank body 100 is divided into interconnected bar screen channel 1, peak shaving and storage area 2, pretreatment area 3, deep treatment area 4, disinfection area 5 and recycled water reuse area 6 by partition walls. The bar screen channel 1 is located in the middle of the integrated tank body 100, the peak shaving and storage area 2 is located on one side of the long side of the bar screen channel 1, and the pretreatment area 3, deep treatment area 4, disinfection area 5 and recycled water reuse area 6 are located on the other side of the long side of the bar screen channel 1 along the water flow direction.

[0036] The two ends of the bar screen channel 1 are respectively equipped with a sewage inlet pipe 11 and a flood discharge pipe 16. The two inner walls with opposite long sides and close to the flood discharge pipe 16 are respectively equipped with a greywater flow restriction gate 17 and a storage flow restriction gate 18. The bar screen channel 1 is connected to the peak shaving and storage area 2 and the pretreatment area 3 through the greywater flow restriction gate 17 and the storage flow restriction gate 18 respectively. The pretreatment area 3 is equipped with an ultra-nano dissolved oxygenation device 7.

[0037] Coarse screen 13 and fine screen 14 are sequentially installed in the grit channel 1 and near the sewage inlet pipe 11 along the water flow direction. Coarse screen 13 and fine screen 14 are located in the independent space of the grit channel 1 separated by the partition wall.

[0038] Water control gates 12 are installed on the surface of the partition wall of the independent space, the sewage inlet pipe 11, and the flood discharge pipe 16.

[0039] Specifically, such as Figure 1 As shown, each component of this system will be explained in detail:

[0040] (1) Grille Channel 1:

[0041] The sewage inlet pipe 11 is used to connect to the municipal stormwater pipe network, and a water control gate 12 is installed at its inlet.

[0042] The coarse screen 13 and fine screen 14 are combined to intercept large particles of debris. A water control gate 12 is also installed at the water inlet and outlet, which also serves as a maintenance gate.

[0043] Waterproof camera 91: Monitors the real-time operating status of grating channel 1;

[0044] Ultrasonic level gauge 92: Real-time monitoring of water volume in the bar screen channel 1, determining the destination of the water, and providing operational logic data for the intelligent monitoring and control device 9;

[0045] COD water quality sensor: Real-time monitoring of incoming water quality to determine the destination of incoming water;

[0046] Reclaimed water flow control gate 17: precisely controls the inflow of water into the reclaimed water treatment zone (pretreatment zone 3, deep treatment zone 4, disinfection zone 5, and reclaimed water reuse zone 6).

[0047] Regulating and limiting gate 18: Precisely controls the inflow of water into peak shaving and regulating storage area 2;

[0048] Water control gate 12 at the outlet of flood discharge pipe 16: controls the amount of water discharged during later rainwater and in extreme situations requiring flood discharge;

[0049] (2) Peak shaving and storage area 2 (peak shaving and initial rainwater storage pond):

[0050] Peak shaving and regulation reservoir: adopts a rectangular underground structure (volume example: 1000m³) to temporarily store highly polluted initial rainwater;

[0051] 22. Portal flushing equipment: High-pressure flushing device for pool walls, regularly cleaning sediment from the bottom of the pool;

[0052] Waterproof camera 91: Monitors the real-time operating conditions of peak shaving and storage area 2;

[0053] Ultrasonic level gauge 92: Real-time monitoring of the liquid level in the initial rain and peak shaving storage area 2, determining the opening and closing of each flow limiting gate in the peak shaving storage area 2 and the start and stop of the storage and drainage pump 21, providing operational logic data for the intelligent monitoring and control device 9.

[0054] Regulating and draining pump 21: A draining pump (power 5.5kW) is installed at the bottom of the pool to drain the sedimented sewage;

[0055] (3) Greywater treatment area:

[0056] A. Preprocessing Zone 3:

[0057] Crushing Grille 15: Highly efficient at intercepting and crushing debris, requiring no manual cleaning;

[0058] Ultra-nano dissolved oxygenation equipment 7: Generates nano-sized bubbles, and injects oxygen-enriched water into the water body of the pretreatment zone 3 through the release device 71, increasing the dissolved oxygen to more than 8 mg / L, effectively improving the water quality.

[0059] B. Deep Processing Area 4:

[0060] 41 layers of phosphorus removal packing: modified zeolite adsorbent (phosphorus removal rate ≥90%).

[0061] 42 layers of nitrogen-reducing packing: sulfur autotrophic denitrification packing (total nitrogen removal rate > 85%);

[0062] C. Disinfection Zone 5:

[0063] UV disinfection module 51: Low-pressure high-intensity ultraviolet lamp assembly (irradiance ≥40mJ / cm²).

[0064] D. Wastewater Reuse Zone 6:

[0065] Ultrasonic level gauge 92: Real-time monitoring of the liquid level in the reclaimed water reuse zone 6, determining the opening and closing of the reclaimed water flow restriction gate 17 and the start and stop of the reclaimed water reuse pump 61; providing operational logic data for the intelligent monitoring and control device 9;

[0066] Automatic water quality monitoring equipment 8: detects indicators such as COD, SS, TN, and TP;

[0067] Reclaimed water pump 61: Variable frequency controlled water pump (3kW power), which delivers qualified reclaimed water to storage facilities;

[0068] Greywater storage facility: Connected to greywater reuse pump 61, it stores treated greywater that meets standards for later use.

[0069] In a preferred embodiment of this utility model, the peak shaving and storage area 2 is further divided into multiple storage tanks parallel to the grid channel 1 by partition walls. Each storage tank is interconnected, and each tank is equipped with a gate flushing device 22 at its upstream end. A storage and drainage pump 21 is installed at the lowest point of the downstream section. The output end of the storage and drainage pump 21 extends out of the integrated tank body 100 through a pipe. The sludge deposited in the peak shaving and storage area 2 is pumped out of the integrated tank body 100 by the storage and drainage pump 21.

[0070] In a preferred embodiment of this utility model, a crushing grid 15 is further provided on the inner wall of the pretreatment zone 3 and at the location corresponding to the greywater flow restriction gate 17, so that the garbage from the grid channel 1 is crushed by the crushing grid 15.

[0071] In a preferred embodiment of this utility model, the ultra-nano dissolved aerobic reoxygenation device 7 further includes a reoxygenation host 73, which is disposed outside the integrated pool body 100. The input end of the reoxygenation host 73 is connected to one end of the reoxygenation inlet pipe 74, and the other end of the reoxygenation inlet pipe 74 extends into the greywater reuse area 6. The output end of the reoxygenation host 73 is connected to one end of the reoxygenation outlet pipe 72, and the other end of the reoxygenation outlet pipe 72 extends into the pretreatment area 3 and is provided with a release device 71.

[0072] In a preferred embodiment of this utility model, the deep treatment zone 4 is further configured as two packing zones in the direction of water flow, and the two packing zones are filled with phosphorus removal packing 41 and nitrogen reduction packing 42 in the direction of water flow.

[0073] In a preferred embodiment of this utility model, a plurality of ultraviolet disinfection modules 51 are evenly arranged in the disinfection zone 5.

[0074] In a preferred embodiment of this utility model, a greywater reuse pump 61 is further provided in the greywater reuse area 6, and the output end of the greywater reuse pump 61 extends out of the integrated pool body 100 through a pipe.

[0075] The greywater reuse area 6 is equipped with an automatic water quality monitoring device 8, which is located outside the integrated water tank and its collection pipe extends into the greywater reuse area 6.

[0076] In a preferred embodiment of this utility model, the intelligent monitoring and control device 9 further includes a waterproof camera 91, an ultrasonic level gauge 92, a COD water quality analyzer, and an intelligent control cabinet 94. The waterproof camera 91 and the ultrasonic level gauge 92 are installed on the inner walls of the peak shaving and storage area 2 and the bar screen channel 1. The COD water quality analyzer is also installed on the inner wall of the bar screen channel 1. Only the ultrasonic level gauge 92 is installed on the inner wall of the reclaimed water reuse area 6. The intelligent control cabinet 94 is electrically connected to the waterproof camera 91, the ultrasonic level gauge 92, and the COD water quality analyzer via wires.

[0077] In a preferred embodiment of this utility model, the intelligent control cabinet 94 is further electrically connected to the water control gate 12, the coarse screen 13, the fine screen 14, the pulverizing screen 15, the greywater flow limiting gate 17, the storage flow limiting gate 18, the storage drain pump 21, the gate flushing device 22, the ultraviolet disinfection module 51, the greywater reuse pump 61, the ultra-nano dissolved oxygenation device 7, and the automatic water quality monitoring device 8 via wires.

[0078] In a preferred embodiment of this utility model, the peak shaving and storage area 2 of the integrated pool 100 is buried deep below ground, while the remaining areas are buried deep below ground or set above ground; the reoxygenation host 73, the intelligent control cabinet 94, and the automatic water quality monitoring equipment 8 are set above ground.

[0079] Specifically, such as Figure 1-2 As shown, the working principle of this system is as follows:

[0080] The separation process is as follows:

[0081] (1) Initial rainwater treatment pathway:

[0082] a. Water intake stage:

[0083] At the beginning of rainfall, the water control gates 12 at the sewage inlet pipe 11, coarse screen 13, fine screen 14 and the regulating and limiting gate 18 are opened, while the water control gate 12 and the reclaimed water limiting gate 17 of the flood discharge pipe 16 are closed, so that the rainwater with poor water quality (COD>100mg / L, SS>200mg / L) enters the peak shaving and regulating area 2 through the sewage inlet pipe 11;

[0084] b. Sewage interception and storage:

[0085] Large particulate pollutants are intercepted by coarse screen 13 and fine screen 14, and rainwater is temporarily stored in the regulating pool to reduce the peak flow.

[0086] c. Draining and cleaning:

[0087] After the rainfall ends, the regulating and emptying pump 21 discharges the sewage into the municipal sewage pipe network;

[0088] The gantry flushing system 22 regularly cleans the sediment at the bottom of the pool;

[0089] (2) Rainwater treatment pathways in the middle and later stages:

[0090] a. Switch the water inlet:

[0091] During the later stages of rainfall, after the water quality improves (COD≤50mg / L, SS≤50mg / L), the inlet gate is switched to the greywater treatment area. At this time, the water control gates 12 at the sewage inlet pipe 11, coarse screen 13, fine screen 14, and greywater flow restriction gate 17 are opened, while the water control gate 12 and the regulating flow restriction gate 18 at the flood discharge pipe 16 are closed.

[0092] b. Pretreatment:

[0093] The ultra-nano dissolved oxygenation equipment 7 oxygenates and degrades organic matter in the pretreatment zone 3 of the water (COD removal rate ≥30%).

[0094] c. Deep purification:

[0095] Rainwater flows through 41 layers of phosphorus removal packing, where phosphorus and heavy metals in the water are adsorbed, and then passes through 42 layers of nitrogen reduction packing, where sulfur is adsorbed and denitrified through autotrophic denitrification.

[0096] d. Disinfection treatment:

[0097] The ultraviolet disinfection module 51 kills pathogenic microorganisms.

[0098] (3) Extreme situations and floodwater treatment pathways:

[0099] In extreme cases, the upstream water volume increases rapidly, and the flood discharge mode needs to be activated. At this time, by opening the water control gates 12 at the sewage inlet pipe 11, coarse screen 13, fine screen 14 and the water control gate 12 at the flood discharge pipe 16, and at the same time closing the regulating and limiting gate 18 and the reclaimed water limiting gate 17, the flood is discharged to the outside of the integrated pool 100 through the flood discharge pipe 16.

[0100] (4) Wastewater disinfection and intelligent reuse:

[0101] The qualified reclaimed water is stored in the reclaimed water reuse area 6. The water quality data is detected by the automatic water quality monitoring equipment 8 and fed back to the intelligent monitoring and control device 9 in real time. The ultrasonic level gauge 92 in the reclaimed water reuse area 6 triggers the reclaimed water reuse pump 61 to supply water as needed for greening or river and lake replenishment.

[0102] (5) Intelligent dynamic control:

[0103] a. Water quality threshold control:

[0104] When the COD of the influent is greater than 80 mg / L, the system will automatically close the reclaimed water flow restriction gate 17 and force the initial rainwater into the storage tank.

[0105] When COD≤50mg / L, the water body is diverted to the reclaimed water treatment area by closing the regulating and limiting gate 18 and opening the reclaimed water limiting gate 17.

[0106] b. Energy-saving operation:

[0107] The wastewater reuse pump 61 operates at a variable frequency based on the data from the ultrasonic level gauge 92, thus reducing energy consumption.

[0108] The number of UV disinfection modules 51 that are turned on is adjusted according to the water volume. By default, 50% of the lamps are turned on, and they are fully turned on when the water volume increases.

[0109] This rainwater storage tank system for reclaimed water reuse based on separate treatment has the following advantages:

[0110] 1. Highly efficient hierarchical processing

[0111] The pretreatment zone 3 features an integrated "interception-pulverization-reoxygenation" design, which improves the efficiency of subsequent treatment; the deep treatment zone 4 specifically removes phosphorus and nitrogen, and the effluent quality meets the "Standard for Reuse of Urban Wastewater" (GB / T18920).

[0112] 2. Intelligent regulation and peak shaving

[0113] Peak shaving and storage area 2 is linked with storage and drainage pump 21 via ultrasonic level gauge 92, which can accommodate instantaneous rainstorm flow. With the help of intelligent gate control, it can reduce peak flow by more than 30% during rainstorms, thereby reducing the risk of urban flooding.

[0114] 3. Green and energy-saving technologies

[0115] The ultra-nano aerosol reoxygenation equipment 7 consumes only 40% of the energy of traditional aeration equipment, and the ultraviolet disinfection module 51 consumes no chemicals, making it highly environmentally friendly.

[0116] 4. Full-process automated control

[0117] Data from instruments and monitoring equipment is uploaded to the central control system in real time, enabling fully automated fault warning, parameter adjustment, and emergency response. Through water quality-quantity linkage control, "on-demand treatment" is achieved, saving over 30% in reagents and energy consumption.

[0118] 5. Modular and flexible expansion

[0119] Each functional module supports independent expansion or replacement to adapt to different scale scenarios (such as residential areas and industrial parks). It supports flexible addition or removal of treatment units (such as adding membrane filtration modules) to adapt to different water quality standards (such as greening water and landscape water replenishment).

[0120] 6. Integrated design

[0121] The water storage, reoxygenation, and greywater treatment are integrated into a single tank, saving more than 40% of the land area and reducing construction costs;

[0122] 7. Ultra-nano dissolved oxygenation technology

[0123] Nanoscale bubbles achieve an oxygen transfer efficiency of 95%, consume only 1 / 3 the energy of traditional aeration equipment, and increase the COD degradation rate by 50%.

[0124] 8. Highly efficient and precise separation processing

[0125] Initial and later-stage rainwater are treated separately to avoid dilution of highly polluted water, improving treatment efficiency by 40%.

[0126] 9. Intelligent switching and energy saving

[0127] Automatic gate switching based on water quality thresholds, variable frequency water pump and ultraviolet disinfection module 51-point control, overall energy consumption reduced by 35%;

[0128] 10. Modular packing design:

[0129] The phosphorus removal packing layer 41 and the nitrogen reduction packing layer 42 can be replaced independently to adapt to different pollution loads, reducing operation and maintenance costs by 50%.

[0130] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A system for treating and storing initial rainwater based on quality-based treatment, comprising an integrated pool body (100) and an intelligent monitoring and control device (9), characterized in that: The integrated pool (100) is divided into interconnected grid channels (1), peak shaving and storage area (2), pretreatment area (3), deep treatment area (4), disinfection area (5) and greywater reuse area (6) by partition walls. The grid channel (1) is located in the middle of the integrated pool (100), the peak shaving and storage area (2) is located on one side of the long side of the grid channel (1), and the pretreatment area (3), the deep treatment area (4), the disinfection area (5) and the greywater reuse area (6) are located on the other side of the long side of the grid channel (1) along the water flow direction. The two ends of the grid channel (1) are respectively provided with a sewage inlet pipe (11) and a flood discharge pipe (16). The two inner walls with opposite long sides and close to the flood discharge pipe (16) are respectively provided with a water flow restriction gate (17) and a storage flow restriction gate (18). The grid channel (1) is connected to the peak shaving and storage area (2) and the pretreatment area (3) through the water flow restriction gate (17) and the storage flow restriction gate (18). The pretreatment area (3) is provided with an ultra-nano dissolved oxygenation device (7). A coarse screen (13) and a fine screen (14) are sequentially arranged along the water flow direction in the screen channel (1) and near the sewage inlet pipe (11). The coarse screen (13) and the fine screen (14) are located in an independent space in the screen channel (1) separated by a partition wall. Water control gates (12) are installed on the surface of the partition wall of the independent space, the sewage inlet pipe (11), and the flood discharge pipe (16).

2. The system according to claim 1, wherein the system is characterized in that: The peak shaving and storage area (2) is divided into multiple storage tanks parallel to the grid channel (1) by partition walls. Each storage tank is interconnected, and each tank is equipped with a gate flushing device (22) at its upstream end and a storage and drainage pump (21) at the lowest point of its downstream section. The output end of the storage and drainage pump (21) extends out of the integrated tank body (100) through a pipe. The sludge deposited in the peak shaving and storage area (2) is pumped out of the integrated tank body (100) by the storage and drainage pump (21).

3. The system according to claim 2, wherein the system is characterized in that: A shredder (15) is provided on the inner wall of the pretreatment zone (3) and at the location corresponding to the greywater flow restriction gate (17) to shred the garbage from the grate channel (1).

4. The system according to claim 3, wherein the system is characterized in that: The ultra-nano dissolved aerobic reoxygenation device (7) includes a reoxygenation host (73), which is located outside the integrated pool (100). The input end of the reoxygenation host (73) is connected to one end of the reoxygenation inlet pipe (74), and the other end of the reoxygenation inlet pipe (74) extends into the greywater reuse area (6). The output end of the reoxygenation host (73) is connected to one end of the reoxygenation outlet pipe (72), and the other end of the reoxygenation outlet pipe (72) extends into the pretreatment area (3) and is equipped with a release device (71).

5. The system according to claim 4, wherein the system is characterized in that: The deep treatment zone (4) is set up as two packing zones in the direction of water flow, and the two packing zones are filled with phosphorus removal packing (41) and nitrogen reduction packing (42) in the direction of water flow.

6. The system according to claim 5, wherein the system is characterized in that: Multiple ultraviolet disinfection modules (51) are evenly arranged in the disinfection zone (5).

7. The system according to claim 6, wherein the system is characterized in that: The greywater reuse area (6) is equipped with a greywater reuse pump (61), and the output end of the greywater reuse pump (61) extends out of the integrated pool body (100) through a pipe; The greywater reuse area (6) is equipped with an automatic water quality monitoring device (8), which is located outside the integrated water tank and its collection pipe extends into the greywater reuse area (6).

8. The system according to claim 7, wherein the system is characterized in that: The intelligent monitoring and control device (9) includes a waterproof camera (91), an ultrasonic level gauge (92), a COD water quality detector, and an intelligent control cabinet (94). The waterproof camera (91) and the ultrasonic level gauge (92) are installed on the inner walls of the peak shaving and storage area (2) and the bar screen channel (1). The COD water quality detector is also installed on the inner wall of the bar screen channel (1). Only the ultrasonic level gauge (92) is installed on the inner wall of the greywater reuse area (6). The intelligent control cabinet (94) is electrically connected to the waterproof camera (91), the ultrasonic level gauge (92), and the COD water quality detector via wires.

9. The system according to claim 8, wherein the system is characterized in that: The intelligent control cabinet (94) is electrically connected to the water control gate (12), the coarse screen (13), the fine screen (14), the crushing screen (15), the greywater flow limiting gate (17), the storage flow limiting gate (18), the storage drainage pump (21), the gate flushing device (22), the ultraviolet disinfection module (51), the greywater reuse pump (61), the ultra-nano dissolved oxygenation device (7), and the automatic water quality monitoring device (8) via wires.

10. The system according to claim 9, wherein the system is characterized in that: The peak shaving and storage area (2) of the integrated pool (100) is buried deep below ground, while the remaining areas are buried deep below ground or set above ground; the reoxygenation host (73), the intelligent control cabinet (94) and the automatic water quality monitoring equipment (8) are set above ground.

Images