Initial rainwater collection pool with precipitation function
By integrating sedimentation and intelligent control, the initial rainwater collection tank solves the problems of large footprint and high treatment cost of initial rainwater collection tanks, achieves efficient sedimentation and collection, ensures the quality of effluent, and is suitable for the reuse of initial rainwater in industrial plants.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-07
AI Technical Summary
Existing initial rainwater collection ponds suffer from problems such as the use of submersible pumps to collect initial rainwater containing sediment, making the water difficult to reuse directly, and the facilities require a large area and have high treatment costs.
Design a simple initial rainwater collection tank that integrates a collection channel, collection pool, partition wall, baffle plate, and decanter to achieve collection and sedimentation in one. The baffle plate reduces turbulence, the partition wall allows for zoned sedimentation, and an interlocking circuit between the intelligent controller and the pump ensures the separation of clean water and sludge.
It achieves efficient sedimentation and collection of initial rainwater, reduces land area and construction costs, ensures the quality of effluent, and enables direct reuse of water for production or as a pretreatment facility, thereby improving work efficiency and equipment operation stability.
Smart Images
Figure CN224092608U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment technology, specifically relating to an initial rainwater collection tank with sedimentation function that has a simple structure, integrates collection and sedimentation, and produces good effluent quality. Background Technology
[0002] Initial rainwater refers to the rainwater collected in the first 15-30 minutes after the initial rainfall washes away surface pollutants. Compared to later-stage rainwater, initial rainwater typically contains higher concentrations of impurities, oils, heavy metals, COD, and other pollutants, especially in heavily polluted industrial areas where it carries a wider variety and higher concentrations of pollutants. Direct discharge of untreated initial rainwater into water bodies will cause environmental pollution. Therefore, many standards and regulations now require the collection and treatment of initial rainwater. The calculation of initial rainwater volume includes two types: one based on the duration of initial rainfall, and the other based on the depth of initial rainfall. Different industries have different requirements for rainfall duration or depth, but all require that the effective volume of the initial rainwater collection pond be no less than the initial rainwater volume, ensuring that as much initial rainwater as possible is collected and preventing the mixing of later-stage rainwater.
[0003] The reuse of initial rainwater collected in industrial plants is a key aspect of initial rainwater collection tank design. Currently, reuse typically involves setting up a collection pit at the bottom of the tank, where submersible pumps lift the water to reuse points or to an initial rainwater treatment system for further treatment. However, existing rainwater reuse methods suffer from several drawbacks. The initial rainwater pumped by the submersible pumps contains sediment, making it difficult to use directly even at production water points with low water quality requirements. Furthermore, as the upstream of the initial rainwater treatment station, existing initial rainwater collection tanks only serve a regulating function. Since these tanks are generally large, their single regulating function not only results in economic waste but also necessitates the addition of sedimentation and filtration systems, leading to large land areas for treatment facilities and high subsequent treatment costs. Utility Model Content
[0004] To optimize initial rainwater reuse measures, this utility model provides an initial rainwater collection tank with sedimentation function that has a simple structure, integrates collection and sedimentation, and produces good effluent quality. The initial rainwater collection tank can collect and settle rainwater, so that it can be directly reused in production processes with low water requirements or used as a pretreatment facility for an initial rainwater treatment system.
[0005] The initial rainwater collection tank with sedimentation function of this utility model is implemented as follows: it includes a water collection channel and a water collection pool, the water collection channel being connected to the water collection pool; a partition wall is fixedly installed on the side of the water collection pool away from the water collection channel to form an independent clear water area; water collection pits are respectively set at the bottom of the pool on both sides of the partition wall; a decanter connecting the water collection pool and the clear water area is installed at the lower part of the partition wall; a sludge lifting pump and a clear water lifting pump are respectively installed in the water collection pits on both sides of the partition wall.
[0006] Furthermore, the water collection channel is a pipe, open channel, or culvert used to collect initial rainwater, and a grating is provided inside the water collection channel or at the outlet end of the water collection channel.
[0007] Furthermore, a baffle plate is provided on one side of the water collection tank near the water collection channel to separate the water collection tank, and the baffle plate is provided with several water passage holes.
[0008] Furthermore, the baffle plate is a perforated flower wall or grating plate, and the baffle plate is longitudinally arranged in the water collection pool with its two ends fixedly connected to the two side walls of the water collection pool and its bottom end abutting the bottom of the water collection pool.
[0009] Furthermore, the perforations or gratings on the water baffle are distributed on both sides facing the outlet end of the water collection channel.
[0010] Furthermore, a water level sensor is installed in the clear water zone, and the water level sensor is electrically connected to a controller outside the water collection tank. The clear water lift pump is also electrically connected to the controller.
[0011] Furthermore, the controller is equipped with an interlock control circuit that controls the interlock between the sludge lift pump, the clean water lift pump, and the decanter.
[0012] Furthermore, the decanter is a siphon decanter, a rotary decanter, a self-floating decanter, or a mechanical decanter.
[0013] Furthermore, the outlet of the decanter on the partition wall is connected to the lower part of the clear water zone.
[0014] Furthermore, the water collection pit is located at one end along the length of the partition wall, and the decanter on the partition wall is located on the outside of the water collection pit.
[0015] This utility model has the following beneficial effects:
[0016] 1. This utility model sets up a water collection pit, partition wall, decanter and other components in the water collection tank. Since there are no complicated components, the difficulty of design, construction and maintenance is reduced, so the structure is relatively simple. Moreover, it can form a "collection + sedimentation" two-in-one structure with both regulation and sedimentation functions, avoiding the disadvantage of the traditional solution that requires the addition of a sedimentation tank, reducing the footprint and reducing construction and maintenance costs.
[0017] 2. The present invention incorporates baffles and partitions within the collection tank to aid sedimentation. The water passages on the baffles reduce the scouring force of initial rainwater, slow turbulence, and distribute water evenly, thereby enhancing the sedimentation effect of suspended solids and improving the sedimentation rate and effectiveness of suspended solids in the initial rainwater collection tank. Furthermore, the separation design between the clear water zone and the sludge zone (partition wall + decanter) effectively separates the clear water and sludge, preventing disturbance of the settled sludge during the operation of the clear water lift pump, ensuring the quality of the effluent. This effluent can be directly reused in production processes with low water requirements or used as a pretreatment facility for the initial rainwater treatment system, thus reducing the burden on the initial rainwater treatment system.
[0018] 3. This utility model, by installing a water level sensor and controller in the clear water zone, and the controller equipped with an interlocking control circuit to control the sludge lift pump and the clear water lift pump, achieves intelligent control while preventing sludge stirred up by the sludge lift pump from mixing into the effluent through interlocking. Furthermore, the decanter can automatically adapt to different water level changes in the collection tank, accurately discharging the upper clear water and reducing manual intervention. Therefore, the technical solution of this utility model not only ensures the orderly operation of the equipment and the quality of the effluent, but also improves work efficiency.
[0019] In summary, this utility model achieves comprehensive advantages of "small footprint, low cost, excellent water quality, and easy maintenance" by integrating sedimentation function, optimizing hydraulic flow, and introducing intelligent control. It also specifically solves the core problems of low sedimentation efficiency, redundant facilities, and complex operation and maintenance in traditional initial rainwater collection and reuse measures. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the plan layout of this utility model;
[0021] Figure 2 yes Figure 1 Sectional view along line I-I;
[0022] Figure 3 yes Figure 1 Sectional view along line II-II;
[0023] In the diagram, 1-water collection channel, 2-water collection pool, 3-water baffle, 4-partition wall, 5-clean water area, 6-water collection pit, 7-decanter, 8-sludge lifting pump, 9-clean water lifting pump, 10-grid. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.
[0025] like Figure 1 ,2 As shown in Figure 3, this utility model includes a water collection channel 1 and a water collection tank 2, wherein the water collection channel 1 is connected to the water collection tank 2; a partition wall 4 is fixedly installed on the side of the water collection tank 2 away from the water collection channel 1 to form an independent clear water area 5; water collection pits 6 are respectively installed at the bottom of the water collection tank 2 on both sides of the partition wall 4; a decanter 7 is installed at the lower part of the partition wall 4 to connect the water collection tank 2 and the clear water area 5; and a sludge lifting pump 8 and a clear water lifting pump 9 are respectively installed in the water collection pits 6 on both sides of the partition wall 4.
[0026] The water collection channel 1 is a pipe, open channel or culvert used to collect initial rainwater, and a grid 10 is provided inside the water collection channel 1 or at the outlet end of the water collection channel 1.
[0027] A baffle plate 3 is provided on one side of the water collection tank 2 near the water collection channel 1 to separate the water collection tank 2. The baffle plate 3 is provided with several water passage holes.
[0028] The water baffle 3 is a perforated flower wall or grating. The water baffle 3 is longitudinally arranged in the water collection pool 2 and its two ends are fixedly connected to the two side walls of the water collection pool 2, and its bottom end abuts against the bottom of the water collection pool 2.
[0029] The perforations or gratings on the baffle plate 3 are distributed on both sides facing the outlet end of the water collection channel 1.
[0030] A water level sensor is installed in the clear water zone 5. The water level sensor is electrically connected to the controller outside the water collection tank 2. The clear water lift pump 9 is electrically connected to the controller.
[0031] The controller is equipped with an interlock control circuit that controls the interlock between the sludge lift pump 8, the clean water lift pump 9, and the decanter 7. The sludge lift pump 8 starts after the clean water pump 9 and the decanter 7 stop working; the clean water lift pump 9 starts when the water level in the clean water zone is high and stops when the water level is low; the decanter 7 is normally open.
[0032] The decanter 7 is a siphon decanter, a rotary decanter, a self-floating decanter, or a mechanical decanter. The decanter 7 enables the upper layer of clear water to be discharged from the collection tank 2 at different liquid levels, thereby ensuring the water quality of the clear water zone 5 and the effluent.
[0033] The outlet of the decanter 7 on the partition wall 4 is connected to the lower part of the clear water zone 5.
[0034] The water collection pit 6 is located at one end along the length of the partition wall 4, and the decanter 7 on the partition wall 4 is located on the outside of the water collection pit 6.
[0035] The design of the water collection tank 2 is based on that of a horizontal flow sedimentation tank.
[0036] The working principle and process of this utility model:
[0037] like Figure 1 , 2 As shown in Figure 3, during rainfall, the initial rainwater passes through the grid 10 in the collection channel 1 (such as a pipe, open channel, or culvert) to intercept suspended and floating matter in the initial rainwater, and then enters the collection tank 2; subsequently, it passes through the baffle 3 (such as a perforated flower wall or grating) to reduce turbulence and achieve uniform water distribution, causing the suspended matter in the initial rainwater to gradually settle; after the initial rainwater from a rain event has been collected and the water in the collection tank 2 has become clear, the decanter 7 is opened to send the upper layer of clear water in the collection tank 2 into the clear water zone 5. When the water level in the clear water zone 5 is high, the clear water lift pump 9 is started to lift the clear water to the production water point for direct reuse, or to enter the initial rainwater treatment system for further treatment. The suspended solids in the initial rainwater settle at the bottom of the collection tank 2 to form sludge, which eventually collects in the collection pit 6 outside the clear water zone 5. After the decanter 7 and the clear water lift pump 9 stop, the sludge lift pump 8 is started to lift the sludge in the collection pit 6 outside the clear water zone 5 to the sludge treatment system for treatment, thus completing the collection and sedimentation of the initial rainwater.
[0038] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A rainwater collection tank with sedimentation function, comprising a water collection channel (1) and a water collection pool (2), wherein the water collection channel (1) is connected to the water collection pool (2); characterized in that: The water collection tank (2) has a partition wall (4) fixedly installed on the side away from the water collection channel (1) to form an independent clear water area (5). The water collection tank (2) has water collection pits (6) respectively installed on the bottom of the tank on both sides of the partition wall (4). The lower part of the partition wall (4) is equipped with a decanter (7) that connects the water collection tank (2) and the clear water area (5). The water collection pits (6) on both sides of the partition wall (4) are respectively equipped with sludge lifting pump (8) and clear water lifting pump (9).
2. The initial rainwater collection tank with sedimentation function according to claim 1, characterized in that: The water collection channel (1) is a pipe, open channel or culvert used to collect initial rainwater, and a grid (10) is provided inside the water collection channel (1) or at the outlet end of the water collection channel (1).
3. The initial rainwater collection tank with sedimentation function according to claim 1, characterized in that: A baffle plate (3) is provided on one side of the water collection pool (2) near the water collection channel (1) to separate the water collection pool (2). The baffle plate (3) has several water passage holes.
4. The initial rainwater collection tank with sedimentation function according to claim 3, characterized in that: The baffle plate (3) is a perforated flower wall or grating. The baffle plate (3) is longitudinally arranged in the water collection pool (2) and its two ends are fixedly connected to the two side walls of the water collection pool (2), and its bottom end abuts against the bottom of the water collection pool (2).
5. The initial rainwater collection tank with sedimentation function according to claim 4, characterized in that: The perforations or gratings on the baffle plate (3) are distributed on both sides facing the outlet end of the water collection channel (1).
6. The initial rainwater collection tank with sedimentation function according to claim 1, characterized in that: A water level sensor is installed in the clear water zone (5), and the water level sensor is electrically connected to the controller outside the water collection tank (2). The clear water lift pump (9) is electrically connected to the controller.
7. The initial rainwater collection tank with sedimentation function according to claim 6, characterized in that: The controller is equipped with an interlock control circuit that controls the interlock between the sludge lift pump (8), the clean water lift pump (9), and the decanter (7).
8. The initial rainwater collection tank with sedimentation function according to claim 1, characterized in that: The decanter (7) is a siphon decanter, a rotary decanter, a self-floating decanter, or a mechanical decanter.
9. The initial rainwater collection tank with sedimentation function according to any one of claims 1 to 8, characterized in that: The outlet of the decanter (7) on the partition wall (4) is connected to the lower part of the clear water area (5).
10. The initial rainwater collection tank with sedimentation function according to claim 9, characterized in that: The water collection pit (6) is located at one end along the length of the partition wall (4), and the decanter (7) on the partition wall (4) is located on the outside of the water collection pit (6).