Multi-effect graded initial rain storage tank

Abstract

The present invention discloses a multi-effect graded initial rain regulating and storage tank, including a diversion device for collecting initial rain and diverting the initial rain to a regulating and storage tank group, and an artificial wetland and a sewage treatment plant for treating the initial rain, wherein the diversion device includes: a rainwater pipe network group, which is connected to the artificial wetland; a first sewage pipe network, which is connected to the artificial wetland and the sewage treatment plant; the regulating and storage tank group includes: a plurality of reservoirs, which are arranged on the rainwater pipe network group at intervals along the water flow direction; a plurality of initial rain water inlet pipes provided with second gates, which correspond to the reservoirs and the rainwater pipe network group respectively; a plurality of second sewage pipe networks, which correspond to the reservoirs and the first sewage pipe network respectively, and an integrated pump station is provided inside any reservoir. The initial rain regulating and storage tank described in the present invention stores rainwater of different concentration gradients in different reservoirs, and the rainwater between the reservoirs does not interfere with each other, so the deterioration of water quality will not affect the water quality of the overall collected water body, greatly reducing the sewage treatment cost.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental engineering, and more specifically, to a multi-effect graded initial rain storage pond. Background Art

[0002] Existing initial rain storage tanks are mainly divided into decentralized small storage tanks and centralized large storage tanks according to their construction scale. In actual engineering applications, decentralized small storage tanks have certain requirements for vacant land, and it is difficult to build small storage tanks in multiple locations; centralized large storage tanks have the problem of insufficient energy saving during use. At the same time, in the design process of the above-mentioned storage tanks, the determination of the tank capacity is based on the maximum value determined by the local regional characteristics and rainfall type, and is designed to meet the most unfavorable conditions. Due to the uncertainty and randomness of rainfall, it is difficult to fully call on the operating efficiency of the storage tank. In addition, in actual applications, the concentration of pollutants in the storage tank shows certain dynamic changes at different rainfall times, especially in the early stage of rainfall, the concentration of pollutants in the runoff is relatively high. If rainwater with different gradient concentrations is mixed and stored in the storage tank, it will inevitably increase the cost of sewage treatment.

[0003] In addition, the existing regulating and storage ponds have a single function and are generally only used for temporary storage of initial rainwater. They have little other utilization value, especially on sunny days, when the regulating and storage ponds are basically idle, which greatly wastes resources. At the same time, the existing regulating and storage ponds also have the disadvantages of low collection rate of high-concentration rainwater, extensive pollutant treatment mode, low operating efficiency, high equipment failure rate, high operation and maintenance costs, and relatively fixed location. Summary of the invention

[0004] Another object of the present invention is to provide a multi-effect graded initial rain regulating and storing tank, which collects rainwater with higher pollutant concentration in the initial stage of rainfall through the first-level reservoir, and collects rainwater with lower pollutant concentration in the second and third-level reservoirs, so that rainwater with different concentration gradients is stored in different reservoirs, and the rainwater between the reservoirs does not interfere with each other. Therefore, the deterioration of water quality will not affect the water quality of the overall collected water body, especially the water body that is prone to produce odor, which will not pollute each other, greatly reducing the cost of sewage treatment.

[0005] In order to achieve these purposes and other advantages according to the present invention, a multi-effect hierarchical initial rain storage tank is provided, including a diversion device for collecting initial rain and diverting the initial rain to a storage tank group, and an artificial wetland and a sewage treatment plant for treating the initial rain, wherein:

[0006] The diversion device comprises:

[0007] A rainwater pipe network group, whose water inlet is used for taking in primary rainwater and whose water outlet is connected to the artificial wetland, and a first gate is arranged at one end of the rainwater pipe network group close to the artificial wetland;

[0008] A first sewage pipe network connecting the artificial wetland and the sewage treatment plant;

[0009] The storage tank group comprises:

[0010] A plurality of water storage tanks are arranged on the rainwater pipe network group at intervals along the water flow direction;

[0011] A plurality of primary rainwater inlet pipes, which are respectively connected to the water storage tank and the rainwater pipe network group, and the plurality of primary rainwater inlet pipes are located between the water inlet of the rainwater pipe network group and the first gate, and a second gate is provided on any primary rainwater inlet pipe;

[0012] A plurality of second sewage pipe networks, which are respectively connected to the water reservoir and the first sewage pipe network, and an integrated pump station is provided inside any water reservoir to transport the initial rainwater in the water reservoir to the second sewage pipe network;

[0013] Wherein, a one-way valve is provided at the connection point between the second sewage pipe network far away from the artificial wetland and the first sewage pipe network, which is used to prevent initial rain from flowing to the artificial wetland.

[0014] Preferably, the regulating reservoir group further includes a plurality of connecting pipes, one of which is provided between each adjacent water reservoir for connecting the water reservoirs, and a third gate is provided on any connecting pipe.

[0015] Preferably, any of the water reservoirs comprises a water collection tank, a grille tank and a grit tank which are connected in sequence and are all arranged inside the water reservoir. The water collection tank is connected to the initial rain water inlet pipe, the grille tank is provided with a grille along its width direction, the grit tank is connected to the second sewage pipe network, and the grit tank is connected to the integrated pumping station through a pump pipe.

[0016] Preferably, the grit chamber further comprises:

[0017] An inner circulation trough, which is fixedly arranged inside the grit chamber and is connected to the second sewage pipe network and the pump pipe respectively, a plurality of convection slits for connecting the inner circulation trough and the grit chamber are arranged on the side wall below the inner circulation trough, a water inlet is arranged on the side wall above the inner circulation trough, and the height of the water inlet is higher than the connection point between the grit chamber and the grille tank;

[0018] A plurality of first baffles are arranged at intervals along the circumference of the inner circulation groove, any first baffle is fixedly arranged on the inner side wall of the inner circulation groove and does not contact the convection slot, and the first baffle and the convection slot are located in the same horizontal plane;

[0019] A plurality of second baffles are arranged on the bottom surface of the inner circulation groove at intervals along the length direction of the inner circulation groove. The outer periphery of any second baffle is serrated. Any second baffle is arranged at an acute angle to the bottom surface of the inner circulation groove. The plurality of second baffles are arranged in parallel.

[0020] Preferably, any of the water reservoirs further comprises:

[0021] A water tank, which is arranged inside the water storage tank and communicated with the inner circulation groove, wherein a first guide wall is arranged inside the water storage tank, which is a W-shaped structure and whose opening faces the grit chamber, and the outer periphery of the first guide wall does not contact the water storage tank; a pair of second guide walls, which are arranged relatively parallel to each other at two openings of the first guide wall along the width direction of the water storage tank, wherein one end of any second guide wall is arranged on the inner side wall of the water storage tank, and the other end does not contact the first guide wall, and the initial rain forms a loop in the area formed by the first guide wall, the second guide wall and the water storage tank;

[0022] A plurality of ejectors are arranged at intervals inside the water storage tank to return the initial rain in the water storage tank to the inner circulation trough along the direction of the reverse loop;

[0023] A fourth gate is arranged between the inner circulation groove and the pump pipe.

[0024] Preferably, the rainwater pipe network group includes a first rainwater pipe network and a second rainwater pipe network which are interconnected, a diversion well is connected between the first rainwater pipe network and the second rainwater pipe network, the first rainwater pipe network is used to take in initial rain, the second rainwater pipe network is connected to the artificial wetland, and the second rainwater pipe network is also connected to a plurality of initial rain inlet pipes, a first water level monitoring device is provided inside the diversion well for monitoring the water level of the diversion well; and a water quality monitoring device is provided for monitoring the concentration of initial rain.

[0025] Preferably, a second water level monitoring device is provided inside the water tank for monitoring the water level of the water tank.

[0026] Preferably, it also includes a control device, which is electrically connected to the integrated pump station, the fourth gate and the plurality of injectors.

[0027] Preferably, a grit chamber is provided between any one of the second sewage pipe networks and the first sewage pipe network.

[0028] Preferably, it further comprises a control system, which comprises:

[0029] A storage unit, which is used to store a preset value of the water level in the diversion well, a preset value of the initial rain concentration, and a preset value of the water level in the water storage tank;

[0030] A calculation unit, which obtains water level data monitored by the first water level monitoring device and compares the data with a preset value of the water level in the diversion well, the calculation unit also obtains initial rain concentration data monitored by the water quality monitoring device and compares the data with a preset value of the initial rain concentration, the calculation unit also obtains water level data monitored by the second water level monitoring device and compares the data with a preset value of the water level in the water storage tank;

[0031] A control unit, which obtains a comparison value between the water level data monitored by the first water level monitoring device in the calculation unit and a preset value of the water level in the diversion well, a comparison value between the initial rain concentration data monitored by the water quality monitoring device and a preset value of the initial rain concentration, and a comparison value between the water level data monitored by the second water level monitoring device and a preset value of the water level in the water storage tank, and controls the plurality of the second gates, the first gate, and the control device;

[0032] When the water level data monitored by the first water level monitoring device in the calculation unit and the initial rain concentration data monitored by the water quality monitoring device are both greater than the preset value, the control unit opens the second gate on the first water storage tank, and determines whether to open the second gate on the next water storage tank and the first gate on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device and the preset value of the water level in the water storage tank;

[0033] When the water level data monitored by the first water level monitoring device in the calculation unit is greater than the preset value, but the initial rain concentration data monitored by the water quality monitoring device are all less than the preset value, the control unit opens the second gate on the second water storage tank, and determines whether to open the second gate on the next water storage tank and the first gate on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device and the preset value of the water level in the water storage tank;

[0034] When the data monitored by the first water level monitoring device in the calculation unit is lower than the preset value, the control unit starts the control device, and the control device controls the fourth gate to open, and at the same time controls the ejector and the integrated pump station to work, so as to transport the initial rain to the sewage treatment plant or artificial wetland for treatment;

[0035] Wherein, the storage unit, the calculation unit, the control unit and the control device transmit information to each other.

[0036] The present invention has at least the following beneficial effects:

[0037] 1. The initial rain regulating reservoir of the present invention collects rainwater with a higher pollutant concentration in the initial stage of rainfall through the first-level reservoir, and collects rainwater with a lower pollutant concentration in the second and third-level reservoirs, so that rainwater with different concentration gradients is stored in different reservoirs, and the rainwater between the reservoirs does not interfere with each other. Therefore, the deterioration of water quality will not affect the water quality of the overall collected water body, especially the water body that is prone to produce odor, which will not pollute each other, greatly reducing the cost of sewage treatment;

[0038] 2. The initial rain in the secondary water storage tank of the present invention can be transported to the adjacent water storage tank through the connecting pipe, which strengthens the linkage between the water storage tanks at all levels and fully utilizes the operating efficiency of the water storage tanks;

[0039] 3. The grid tank and the grit tank described in the present invention perform preliminary treatment on larger debris and coarse particles such as mud and sand in the initial rain, thereby ensuring the water quality requirements for the sewage treatment plant and the artificial wetland.

[0040] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the structure of a multi-effect graded initial rain storage tank according to an embodiment of the present invention;

[0042] Figure 2 It is a structural schematic diagram of the grit chamber of the present invention;

[0043] Figure 3 It is a process flow chart of the treatment of initial rain by the multi-effect graded initial rain storage tank described in the above embodiment.

[0044] 1. Artificial wetland, 2. Sewage treatment plant, 3. First sewage pipe network, 301. Second rainwater pipe network, 302. First gate, 303. First rainwater pipe network, 304. Second sewage pipe network, 305. Diversion well, 306. First water level monitoring device, 307. Water quality monitoring device, 4. Primary reservoir, 401. Secondary reservoir, 402. Third reservoir, 403. Initial rainwater inlet pipe, 404. Primary gate, 405. Secondary gate, 406. Third gate, 407. Integrated pump station, 408, connecting pipe, 409, third gate, 5, water collection tank, 6, grille tank, 601, grille, 7, sand settling tank, 701, inner circulation trough, 702, convection gap, 703, first baffle, 704, second baffle, 8, control device, 801, pump pipe, 802, fourth gate, 9, water storage tank, 901, first diversion wall, 902, ejector, 903, second water level monitoring device, 904, second diversion wall, 10, control system, 11, loop. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0046] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0047] like Figure 1 , 3 As shown, the present invention provides a multi-effect graded initial rain storage tank, including a diversion device for collecting initial rain and diverting the initial rain to a storage tank group, and an artificial wetland 1 and a sewage treatment plant 2 for treating the initial rain, wherein:

[0048] The diversion device comprises:

[0049] A rainwater pipe network group, whose water inlet is used for taking in initial rainwater, and whose water outlet is connected to the artificial wetland 1, and a first gate 302 is provided at one end of the rainwater pipe network group close to the artificial wetland 1;

[0050] A first sewage pipe network 3, which connects the artificial wetland 1 and the sewage treatment plant 2;

[0051] The storage tank group comprises:

[0052] A plurality of water storage tanks are arranged on the rainwater pipe network group at intervals along the water flow direction;

[0053] A plurality of initial rainwater inlet pipes 403, which are respectively connected to the water reservoir and the rainwater pipe network group, and the plurality of initial rainwater inlet pipes 403 are located between the water inlet of the rainwater pipe network group and the first gate 302, and a second gate is provided on any initial rainwater inlet pipe 403;

[0054] A plurality of second sewage pipe networks 304, which are respectively connected to the water reservoir and the first sewage pipe network 3, and an integrated pump station is provided inside any water reservoir to transport the initial rainwater in the water reservoir to the second sewage pipe network 304;

[0055] A one-way valve is provided at the connection point between the second sewage pipe network 304 far away from the artificial wetland 1 and the first sewage pipe network 3 , which is used to prevent initial rain from flowing to the artificial wetland 1 .

[0056] In the above technical scheme, there are three water storage tanks, the water inlet of the rainwater pipe network group is used for taking in initial rain, the water outlet is connected with the artificial wetland 1, and a first gate 302 is provided at one end of the rainwater pipe network group close to the artificial wetland 1, by opening the first gate 302, the initial rain can be discharged to the artificial wetland 1 after passing through the rainwater pipe network group; the artificial wetland 1 and the sewage treatment plant 2 are connected through the first sewage pipe network 3, and a plurality of water storage tanks are arranged along the water flow direction and are connected with the rainwater pipe network group and the first sewage pipe network 3 through the initial rain water inlet pipe 403 and the second sewage pipe network 304 respectively, and a second gate is provided on any initial rain water inlet pipe 403, by opening the second gate and closing the first gate 3 02, after the initial rain passes through the rainwater pipe network group, it can flow to the corresponding water storage tank through the initial rain inlet pipe 403. The integrated pump station inside any water storage tank can transport the initial rain in the water storage tank to the second sewage pipe network 304 in the form of pumping and then discharge it to the artificial wetland 1 or sewage treatment plant 2 connected thereto. Among them, a one-way valve is provided at the connection between the second sewage pipe network 304 far away from the artificial wetland 1 and the first sewage pipe network 3, which is used to prevent the initial rain in the water storage tank 9 close to the sewage treatment plant 2 from flowing to the artificial wetland 1. When the number of water storage tanks is greater than 3, the initial rain in the water storage tank 9 close to the water inlet of the rainwater pipe network group can only be discharged to the sewage treatment plant 2 for treatment.

[0057] The multiple reservoirs are named as the primary reservoir 4, the secondary reservoir 401 and the tertiary reservoir 402 in sequence along the water flow direction, and the corresponding second gates are named as the primary gate 404, the secondary gate 405 and the tertiary gate 406 respectively. In the initial state of the regulating reservoir described in the present application, all the gates are closed. When it rains, the primary gate 404 is opened manually, and the initial rain flows into the primary reservoir 4 for storage. When the primary reservoir 4 is full, the primary gate 404 is closed, the secondary gate 405 is opened, and the initial rain flows into the secondary reservoir 401 for storage. When the secondary reservoir 401 is full, the secondary gate 405 is closed, and the tertiary gate 406 is opened. Gate 406, the initial rain flows to the tertiary water storage tank 402 for storage. When there is still rainfall after the tertiary water storage tank 402 is full, the tertiary gate 406 is closed and the first gate 302 is opened to allow the initial rain to flow directly to the artificial wetland 1 through the rainwater pipe network group for ecological purification and then discharged into the urban water body; after the rainfall is over, the integrated pumping stations in the three water storage tanks are manually started, and the integrated pumping station 407 in the primary water storage tank 4 discharges the initial rain through the second sewage pipe network 304 to the sewage treatment plant for treatment, and the integrated pumping stations 407 in the secondary and tertiary water storage tanks 402 discharge the initial rain through the corresponding second sewage pipe network 304 to the sewage treatment plant 2 and the artificial wetland 1 for treatment. The initial rain regulating and storage tank described in the present application collects rainwater with a higher pollutant concentration in the initial stage of rainfall through the first-level water reservoir 4, and then directly discharges it to the sewage treatment plant 2 for treatment. The second and third-level water reservoirs 402 collect rainwater with a lower pollutant concentration and then flow to the artificial wetland 1 and the sewage treatment plant 2 for treatment through the self-weight of the rainwater, so that rainwater with different concentration gradients is stored in different water reservoirs, and the rainwater between the water reservoirs does not interfere with each other. Therefore, the deterioration of water quality will not affect the water quality of the overall collected water body, especially the water body that is prone to produce odor, and will not pollute each other, which greatly reduces the cost of sewage treatment. In addition, the multiple water reservoirs in the regulating and storage tank described in the present invention are independent of each other, and their construction method and location setting can be reasonably arranged according to actual conditions, without being limited and constrained by large areas, which greatly reduces the construction cost.

[0058] In another technical solution, the regulating reservoir group further includes a plurality of connecting pipes 408 , one of which is provided between each adjacent reservoir for connecting the reservoirs, and a third gate 409 is provided on any connecting pipe 408 .

[0059] In the present technical solution, a connecting pipe 408 is provided between adjacent water reservoirs, and a third gate 409 is provided on the connecting pipe 408. Under normal circumstances, the third gate 409 is in a closed state, and the water reservoirs do not interfere with each other. However, when the secondary water reservoir 401 needs emergency maintenance and cannot continue to store the initial rain, the initial rain in the secondary water reservoir 401 can be temporarily discharged into other water reservoirs for storage through the connecting pipe 408 by opening the third gate 409, and then discharged to the artificial wetland 1 or the sewage treatment plant 2 for treatment, which enhances the linkage between the water reservoirs; when the rainfall is less, only some of the water reservoirs need to be opened to store and process the initial rain, which reduces the operation of the corresponding equipment, not only reduces energy consumption, but also increases the service life of the equipment.

[0060] In another technical solution, any of the water reservoirs comprises a water collection tank 5, a grille tank 6 and a grit tank 7 which are connected in sequence and are all arranged inside the water reservoir. The water collection tank 5 is connected to the initial rain inlet pipe 403, and a grille 601 is provided inside the grille tank 6 along its width direction. The grit tank 7 is connected to the second sewage pipe network 304, and the grit tank 7 is connected to the integrated pumping station through a pump pipe 801.

[0061] In the present technical scheme, the grille 601 in the grille pool 6 is used to intercept larger debris, the grit tank 7 can deposit mud and sand, the water collection tank 5 is connected to the initial rain inlet pipe 403, the grit tank 7 is connected to the second sewage pipe network 304, and the grit tank 7 is also connected to the integrated pump station 407 through the pump pipe 801. When the rainfall ends and the initial rain needs to be treated, the initial rain first enters the water collection tank 5 through the initial rain inlet pipe 403, then flows to the grille pool 6 to intercept larger debris, and finally enters the grit tank 7 to deposit mud and sand. At the same time, the integrated pump station 407 transports the initial rain in the grit tank 7 to the second sewage pipe network 304 through the pump pipe 801, and is discharged to the artificial wetland 1 or the sewage treatment plant 2 for treatment via the second sewage pipe network 304. The initial rain passes through the grille pool 6 and the grit tank 7 in turn, which can remove larger debris and coarse particles such as mud and sand contained in the initial rain, thereby ensuring the water quality requirements of the sewage treatment plant 2 and the artificial wetland 1 for inlet water.

[0062] In another technical solution, the grit chamber 7 further comprises:

[0063] An inner circulation groove 701 is fixedly arranged inside the grit chamber 7 and is connected to the second sewage pipe network 304 and the pump pipe 801 respectively. A plurality of convection slits 702 for connecting the inner circulation groove 701 and the grit chamber 7 are arranged on the side wall below the inner circulation groove 701. A water inlet is arranged on the side wall above the inner circulation groove 701, and the height of the water inlet is higher than the connection point between the grit chamber 7 and the grille chamber 6.

[0064] A plurality of first baffles 703 are arranged at intervals along the circumference of the inner circulation groove 701, and any first baffle 703 is fixedly arranged on the inner side wall of the inner circulation groove 701 and does not contact the convection slot 702, and the first baffle 703 and the convection slot 702 are located in the same horizontal plane;

[0065] A plurality of second baffles 704 are arranged on the bottom surface of the inner circulation groove 701 at intervals along the length direction of the inner circulation groove 701. The outer periphery of any second baffle 704 is serrated. Any second baffle 704 is arranged at an acute angle to the bottom surface of the inner circulation groove 701. The plurality of second baffles 704 are arranged in parallel.

[0066] In this technical solution, if Figure 2 As shown, an inner circulation groove 701 is fixedly provided inside the grit chamber 7, a convection slit 702 is provided on the side wall below the grit chamber 7, a water inlet is provided on the side wall above the grit chamber 7, and the height of the water inlet is higher than the connection point between the grit chamber 7 and the grille chamber 6, a plurality of first baffles 703 are arranged at intervals on the inner side wall of the inner circulation groove 701, and a plurality of second baffles 704 are arranged at intervals on the bottom surface, the outer periphery of the second baffles 704 is serrated, and the second baffles 704 are arranged at an acute angle to the bottom surface of the inner circulation groove 701; when the initial rain is processed, the initial rain located in the grille chamber 6 first enters the grit chamber 7 through the connection point between the grit chamber 7 and the grille chamber 6, and then flows into the inner circulation groove 70 through the convection slit 702 1, when the liquid level of the initial rain reaches the water inlet of the inner circulation trough 701, the initial rain flows into the inner circulation trough 701 through the water inlet, collides with the initial rain flowing in from the convection slit 702, accelerates the sedimentation of sand and gravel in the initial rain, and the initial rain is diverted by the first baffle 703, which can slow down the flow speed of the initial rain, increase the collision chance between the initial rain, and improve the sedimentation efficiency of the grit chamber 7. At the same time, the serrated shape of the outer periphery of the second baffle 704 can, to a certain extent, block the impact of the newly entered initial rain on the settled sand and gravel, prevent the settled sand and gravel in the inner circulation trough 701 from turbulence, and improve the stability of the water flow inside the inner circulation trough 701.

[0067] In another technical solution, any of the water reservoirs further comprises:

[0068] A water tank 9, which is arranged inside the water tank and communicated with the inner circulation groove 701, and a first guide wall 901 is arranged inside the water tank 9, which is a W-shaped structure and its opening faces the grit chamber 7, and the outer periphery of the first guide wall 901 does not contact the water tank 9; a pair of second guide walls 904, which are arranged relatively parallel to the two openings of the first guide wall 901 along the width direction of the water tank 9, one end of any second guide wall 904 is arranged on the inner side wall of the water tank 9, and the other end does not contact the first guide wall 901, and the initial rain forms a loop 11 in the area formed by the first guide wall 901, the second guide wall 904 and the water tank 9;

[0069] A plurality of ejectors 902 are arranged at intervals inside the water storage tank 9 to return the initial rain in the water storage tank 9 to the inner circulation trough 701 along the direction of the reverse loop 11;

[0070] The fourth gate 802 is disposed between the inner circulation groove 701 and the pump pipe 801 .

[0071] In the technical solution, any water storage tank is provided with a water storage tank 9 connected to the inner circulation groove 701. When storing the initial rain, the fourth gate 802 is closed. The interior of the water storage tank is provided with a first guide wall 901 and a pair of second guide walls 904. The first guide wall 901 is a W-shaped structure with an opening facing the sand settling tank 7. The pair of second guide walls 904 are relatively parallel and arranged at the two openings of the first guide wall 901. The outer periphery of the first guide wall 901 does not contact the water storage tank 9. Any second guide wall 90 One end of the first guide wall 901 is connected to the inner wall of the water storage tank 9, and the other end is not in contact with the first guide wall 901. After the initial rain enters the inner circulation groove 701 through the initial rain inlet pipe 403, the water collection tank 5, and the grille tank 6, the initial rain in the inner circulation groove 701 enters the interior of the water storage tank 9 through the connection between the inner circulation groove 701 and the water storage tank 9, and forms a loop 11 in the water storage tank 9 under the action of the first guide wall 901 and the second guide wall 904, wherein the direction marked by the arrow in the loop 11 is the direction of water flow, and the guide wall 904 is used to guide the water flow. The flow wall can enhance the fluidity of the initial rain flowing from the inner circulation trough 701 into the water storage tank 9. When the initial rain needs to be processed after the rainfall ends, the fourth gate 802 is manually opened and the ejector 902 and the integrated pump station 407 are started. Multiple ejectors 902 are arranged at intervals inside the water storage tank 9, which return the initial rain in the water storage tank 9 to the inner circulation trough 701 along the direction of the reverse loop 11. At the same time, the integrated pump station 407 transports the initial rain flowing into the inner circulation trough 701 again to the second sewage pipe network 304 for corresponding treatment. The second baffle 704 located at the bottom of the inner circulation trough 701 can block the sand and gravel in the initial rain to a certain extent, prevent the settled sand and gravel from flowing back again, and improve the water quality of the treated initial rain. The arrangement of the guide wall and the ejector 902 can enhance the fluidity of the water body and prevent sludge accumulation on the one hand, and transport the initial rain to the inner circulation trough 701 in the form of injection on the other hand, so that the regulating reservoir does not need to be flushed, reducing the operation and maintenance costs.

[0072] In another technical solution, the rainwater pipe network group includes a first rainwater pipe network 303 and a second rainwater pipe network 301 which are interconnected, a diversion well 305 is connected between the first rainwater pipe network 303 and the second rainwater pipe network 301, the first rainwater pipe network 303 is used to take in initial rain, the second rainwater pipe network 301 is connected to the artificial wetland 1, and the second rainwater pipe network 301 is also connected to multiple initial rain inlet pipes 403, a first water level monitoring device 306 is provided inside the diversion well 305 for monitoring the water level of the diversion well 305; a water quality monitoring device 307 is provided for monitoring the concentration of initial rain; and a second water level monitoring device 903 is provided inside the water storage tank 9 for monitoring the water level of the water storage tank 9.

[0073] In the technical solution, a diversion well 305 is provided between the first rainwater pipe network 303 and the second rainwater pipe network 301. The diversion well 305 is provided with a first water level monitoring device 306 and a water quality monitoring device 307, which are used to monitor the water level in the diversion well 305 and the concentration of the initial rain in the diversion well 305 respectively. The first rainwater pipe network 303 is used to take in the initial rain, and the second rainwater pipe network 301 is connected with the artificial wetland 1 and the initial rain inlet pipe 403. The second water level monitoring device 903 is arranged inside the water storage tank 9 to monitor the water level of the water storage tank 9. The staff can check the water level changes displayed on the first water level monitoring device 306 and the second water level monitoring device 903 and the concentration of the initial rain displayed on the water quality monitoring device 307, so as to deal with the devices in the regulating reservoir accordingly. When the water level of the first water level monitoring device 306 changes, it means raining, and at the same time, the pollutant concentration of the initial rain displayed on the water quality monitoring device 307 is higher than the initial rain concentration that can be input by the artificial wetland 1 built locally, the staff must first open the first-level gate 404 to store the initial rain in the first-level reservoir 4. , and judge whether to open the gate of the next level to store the initial rain in the next level water tank according to the data displayed by the second water level monitoring device 903 in the first level water tank 4. If the data monitored by the second water level monitoring device 903 reaches the water level that the water tank 9 in the first level water tank 4 can store, it is necessary to open the gate of the next level 404, otherwise, it is not necessary; if the first water level monitoring device 306 has a water level change, but the water quality monitoring device 307 shows that the pollutant concentration of the initial rain is lower than the initial rain concentration that can be input by the artificial wetland 1 built locally The staff can directly open the secondary gate 405 to store the initial rain in the secondary water reservoir 401. During the storage of the initial rain, if the water level in the first water level monitoring device 306 does not change, it means that the rainfall is over. The staff can open the corresponding device to discharge the initial rain in the water reservoir to the artificial wetland 1 or the sewage treatment plant 2 for treatment. By checking the first water level monitoring device 306, the second water level monitoring device 903 and the water quality monitoring device 307, the staff can be reminded to perform corresponding operations, thereby improving the timeliness of the initial rain treatment.

[0074] In another technical solution, it also includes a control device 8, which is electrically connected to the integrated pump station 407, the fourth gate 802 and the plurality of injectors 902.

[0075] In the present technical solution, the control device 8 is electrically connected to the integrated pump station 407, the fourth gate 802 and the ejector 902. When the initial rain needs to be processed after the rainfall ends, the staff can start the control device 8 outside the water storage tank storing the initial rain. The control device 8 controls the fourth gate 802 to open, and at the same time controls the ejector 902 and the integrated pump station to transport the initial rain to the sewage treatment plant 2 or the artificial wetland 1 for treatment. The control device 8 can replace manual control of the device in the water storage tank 9, thereby reducing the workload of the staff.

[0076] In another technical solution, a grit chamber 7 is provided between any of the second sewage pipe networks 304 and the first sewage pipe network 3 .

[0077] In the present technical solution, a grit chamber 7 with the same structure as that in the water reservoir is connected between any second sewage pipe network 304 and the first sewage pipe network 3, so that the mud and sand in the initial rain are subjected to secondary treatment in the grit chamber 7 before being discharged into the artificial wetland 1 or the sewage treatment plant 2, thereby improving the quality of the water body and further reducing the sewage treatment cost.

[0078] In another technical solution, a control system 10 is also included, which includes:

[0079] A storage unit, which is used to store a preset value of the water level in the diversion well 305, a preset value of the initial rain concentration and a preset value of the water level in the water storage tank 9;

[0080] A calculation unit, which obtains the water level data monitored by the first water level monitoring device 306 and compares the data with the preset value of the water level in the diversion well 305, the calculation unit also obtains the initial rain concentration data monitored by the water quality monitoring device 307 and compares the data with the preset value of the initial rain concentration, the calculation unit also obtains the water level data monitored by the second water level monitoring device 903 and compares the data with the preset value of the water level in the water storage tank 9;

[0081] A control unit, which obtains a comparison value between the water level data monitored by the first water level monitoring device 306 in the calculation unit and a preset value of the water level in the diversion well 305, a comparison value between the initial rain concentration data monitored by the water quality monitoring device 307 and a preset value of the initial rain concentration, and a comparison value between the water level data monitored by the second water level monitoring device 903 and a preset value of the water level in the water storage tank 9, and controls the plurality of the second gates, the first gate 302 and the control device 8;

[0082] When the water level data monitored by the first water level monitoring device 306 in the calculation unit and the initial rain concentration data monitored by the water quality monitoring device 307 are both greater than the preset value, the control unit opens the second gate on the first water storage tank 9, and determines whether to open the second gate on the next water storage tank 9 and the first gate 302 on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device 903 and the preset value of the water level in the water storage tank 9;

[0083] When the water level data monitored by the first water level monitoring device 306 in the calculation unit is greater than the preset value, but the initial rain concentration data monitored by the water quality monitoring device 307 are all less than the preset value, the control unit opens the second gate on the second water storage tank 9, and determines whether to open the second gate on the next water storage tank 9 and the first gate 302 on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device 903 and the preset value of the water level in the water storage tank 9;

[0084] When the data monitored by the first water level monitoring device 306 in the calculation unit is lower than the preset value, the control unit starts the control device 8, and the control device 8 controls the fourth gate 802 to open, and at the same time controls the ejector 902 and the integrated pump station to work, so as to transport the initial rain to the sewage treatment plant 2 or the artificial wetland 1 for treatment;

[0085] The storage unit, the calculation unit, the control unit and the control device 8 transmit information to each other.

[0086] In the present technical solution, the preset value in the storage unit can be set according to the local rainfall amount and the degree of rainwater pollution. In the initial state of the regulating reservoir, all the gates are closed. When the data monitored by the first water level monitoring device 306 and the water quality monitoring device 307 calculated by the calculation unit in the control system 10 are higher than the preset value in the storage unit, the initial rain enters the primary reservoir 4, the secondary reservoir 401 and the tertiary reservoir 402 in sequence for storage. First, the control unit in the control system 10 opens the primary gate 404, and the initial rain enters the primary reservoir 4 for storage; then The post-calculation unit compares the data monitored by the second water level monitoring device 903 with the preset value of the water level in the water storage tank 9 to determine whether to open the next-level gate to store the initial rain in the next-level water storage tank. If the monitored data is greater than the preset value, the control unit controls the first-level gate 404 to close and opens the second-level gate 405, and the initial rain enters the next-level water storage tank 4 for storage. Otherwise, it is not necessary. If all three water storage tanks are full of water and the data monitored by the first monitoring device is still higher than the preset value, the control unit opens the first-level gate 404, and the initial rain is directly discharged to the artificial wetland 1 for treatment.

[0087] When the data monitored by the first water level monitoring device 306 calculated by the calculation unit in the control system 10 is higher than the preset value, but the data monitored by the water quality monitoring device 307 is lower than the preset value, the control unit opens the secondary gate 405, and the initial rain is first transported to the secondary water reservoir 401 for storage. Then, the control unit determines whether to open the gate of the next level to store the initial rain in the next level water reservoir according to the comparison data in the calculation unit. When the secondary water reservoir 401 and the tertiary water reservoir 402 are full of water, the control unit opens the primary gate 404, and the initial rain is directly discharged to the artificial wetland 1 for treatment;

[0088] In the process of storing the initial rain, if the data monitored by the first water level monitoring device 306 calculated by the calculation unit is lower than the preset value, it means that the rainfall is over, and the control unit controls the fourth gate 802 to open by starting the control device 8, and controls the ejector 902 and the integrated pump station to work, and transports the initial rain to the sewage treatment plant 2 or the artificial wetland 1 for treatment. The working state of the regulating reservoir is controlled and adjusted by the control system 10, so that rainwater with different concentration gradients is stored in different reservoirs, which greatly reduces the cost of sewage treatment.

[0089] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-effect graded initial rain storage tank, characterized in that: It includes diversion equipment for collecting initial rain and diverting it to a storage tank group, as well as artificial wetlands and sewage treatment plants for treating initial rain, among which: The diversion device comprises: A rainwater pipe network group, whose water inlet is used for taking in primary rainwater and whose water outlet is connected to the artificial wetland, and a first gate is arranged at one end of the rainwater pipe network group close to the artificial wetland; A first sewage pipe network connecting the artificial wetland and the sewage treatment plant; The storage tank group comprises: A plurality of water storage tanks are arranged on the rainwater pipe network group at intervals along the water flow direction; A plurality of primary rainwater inlet pipes, which are respectively connected to the water storage tank and the rainwater pipe network group, and the plurality of primary rainwater inlet pipes are located between the water inlet of the rainwater pipe network group and the first gate, and a second gate is provided on any primary rainwater inlet pipe; A plurality of second sewage pipe networks, which are respectively connected to the water reservoir and the first sewage pipe network, and an integrated pump station is provided inside any water reservoir to transport the initial rainwater in the water reservoir to the second sewage pipe network; Wherein, a one-way valve is provided at the connection point between the second sewage pipe network far away from the artificial wetland and the first sewage pipe network, which is used to prevent initial rain from flowing to the artificial wetland; The rainwater pipe network group includes a first rainwater pipe network and a second rainwater pipe network that are mutually nested, a diversion well is connected between the first rainwater pipe network and the second rainwater pipe network, the first rainwater pipe network is used to take in primary rain, the second rainwater pipe network is connected to the artificial wetland, and the second rainwater pipe network is also connected to a plurality of primary rain inlet pipes, a first water level monitoring device is provided inside the diversion well for monitoring the water level of the diversion well; a water quality monitoring device is used to monitor the concentration of primary rain; Any of the water storage tanks comprises a water collection tank, a grille tank and a grit tank which are connected in sequence, and are all arranged inside the water storage tank. The water collection tank is connected to the initial rainwater inlet pipe, the grille tank is provided with a grille along its width direction, the grit tank is connected to the second sewage pipe network, and the grit tank is connected to the integrated pump station through a pump pipe; The grit chamber also includes: An inner circulation trough, which is fixedly arranged inside the grit chamber and is connected to the second sewage pipe network and the pump pipe respectively, a plurality of convection slits for connecting the inner circulation trough and the grit chamber are arranged on the side wall below the inner circulation trough, a water inlet is arranged on the side wall above the inner circulation trough, and the height of the water inlet is higher than the connection point between the grit chamber and the grille tank; A plurality of first baffles are arranged at intervals along the circumference of the inner circulation groove, any first baffle is fixedly arranged on the inner side wall of the inner circulation groove and does not contact the convection slot, and the first baffle and the convection slot are located in the same horizontal plane; A plurality of second baffles are arranged at intervals along the length direction of the inner circulation groove on the bottom surface of the inner circulation groove, the outer periphery of any second baffle is sawtooth-shaped, any second baffle is arranged at an acute angle with the bottom surface of the inner circulation groove, and the plurality of second baffles are arranged in parallel; Any of the water reservoirs also includes: A water tank, which is arranged inside the water storage tank and communicated with the inner circulation groove, a first guide wall is arranged inside the water storage tank, which is a W-shaped structure and its opening faces the sand settling tank, and the outer periphery of the first guide wall does not contact the water storage tank; a pair of second guide walls are arranged relatively parallel to the width direction of the water storage tank at two openings of the first guide wall, one end of any second guide wall is arranged on the inner wall of the water storage tank, and the other end does not contact the first guide wall, and the initial rain forms a loop in the area formed by the first guide wall, the second guide wall and the water storage tank; a second water level monitoring device is arranged inside the water storage tank for monitoring the water level of the water storage tank; A plurality of ejectors are arranged at intervals inside the water storage tank to return the initial rain in the water storage tank to the inner circulation trough along the direction of the reverse loop; a fourth gate, which is arranged between the inner circulation groove and the pump pipe; Also included is a control device electrically connected to the integrated pump station, the fourth gate and the plurality of injectors; Also included is a control system comprising: A storage unit, which is used to store a preset value of the water level in the diversion well, a preset value of the initial rain concentration, and a preset value of the water level in the water storage tank; A calculation unit, which obtains water level data monitored by the first water level monitoring device and compares the data with a preset value of the water level in the diversion well, the calculation unit also obtains initial rain concentration data monitored by the water quality monitoring device and compares the data with a preset value of the initial rain concentration, the calculation unit also obtains water level data monitored by the second water level monitoring device and compares the data with a preset value of the water level in the water storage tank; A control unit, which obtains a comparison value between the water level data monitored by the first water level monitoring device in the calculation unit and a preset value of the water level in the diversion well, a comparison value between the initial rain concentration data monitored by the water quality monitoring device and a preset value of the initial rain concentration, and a comparison value between the water level data monitored by the second water level monitoring device and a preset value of the water level in the water storage tank, and controls the plurality of the second gates, the first gate, and the control device; When the water level data monitored by the first water level monitoring device in the calculation unit and the initial rain concentration data monitored by the water quality monitoring device are both greater than the preset value, the control unit opens the second gate on the first water storage tank, and determines whether to open the second gate on the next water storage tank and the first gate on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device and the preset value of the water level in the water storage tank; When the water level data monitored by the first water level monitoring device in the calculation unit is greater than the preset value, but the initial rain concentration data monitored by the water quality monitoring device are all less than the preset value, the control unit opens the second gate on the second water storage tank, and determines whether to open the second gate on the next water storage tank and the first gate on the rainwater pipe network group according to the comparison between the data monitored by the second water level monitoring device and the preset value of the water level in the water storage tank; When the data monitored by the first water level monitoring device in the calculation unit is lower than the preset value, the control unit starts the control device, and the control device controls the fourth gate to open, and at the same time controls the ejector and the integrated pump station to work, so as to transport the initial rain to the sewage treatment plant or artificial wetland for treatment; Wherein, the storage unit, the calculation unit, the control unit and the control device transmit information to each other.

2. The multi-effect graded initial rain storage tank according to claim 1, characterized in that: The regulating reservoir group also includes a plurality of connecting pipes, one of which is provided between each of the adjacent water reservoirs for connecting the water reservoirs, and a third gate is provided on any connecting pipe.

3. The multi-effect graded initial rain storage tank according to claim 1, characterized in that: A sand settling tank is provided between any of the second sewage pipe networks and the first sewage pipe network.

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