Stepped wall-mounted rainwater runoff treatment device

Abstract

The invention discloses a stepped wall-mounted rainwater runoff treatment device, and belongs to the field of rainwater treatment. Comprising a first-stage filter tank, a second-stage filter tank, a first rainwater tank, a floating ball and a connecting rod, the floating ball and the connecting rod control opening and closing of a valve, and the first-stage filter tank and the second-stage filter tank are stepped filter tanks and conduct multi-stage treatment on rainwater runoff. Through combination of the first rain tank and the floating ball device, classification treatment of initial rainwater and later rainwater is achieved, the rainwater runoff pollution control efficiency is improved, and a new mode is provided for urban rainwater runoff pollution treatment.

Description

Technical Field

[0001] The invention relates to a stepped wall-mounted rainwater runoff treatment device, which is a treatment system suitable for reducing rainwater surface runoff pollution, a treatment system that can be used for rivers, lakes and other landscape water bodies, and a system suitable for treating rainwater runoff pollution in the field of urban water environment. Background Art

[0002] With the intensification of climate change and the acceleration of urbanization, the amount of urban rainwater runoff has increased, and the pollutants carried by the runoff are of various types and high concentrations. Rainwater runoff is directly discharged from the shore into rivers or lakes, causing pollution and affecting the urban water environment and water ecological safety. A liftable wall-mounted hardened river ecological protection belt (publication number: CN105133543A) is equipped with steel rails and multi-level trapezoidal troughs at the hardened river bank, and the rainwater is purified by vegetation and filter materials in the trapezoidal troughs. However, considering the heavy weight of the steel rails, the actual installation and operation process requires high strength for the river and lake embankments, making it difficult to achieve continuous installation along the river. In addition, the multi-level trapezoidal troughs use the same filler, and do not consider the changes in water quality characteristics after the rainwater is treated at each level. Summary of the invention

[0003] In order to overcome the problems of the prior art, the present invention proposes a stepped wall-mounted rainwater runoff treatment device. The system adopts multi-stage step-by-step treatment, and purifies the rainwater runoff before entering the receiving water body by setting up a stepped two-stage treatment device. The system can be placed on the banks of rivers, lakes and other urban landscape water bodies to separately treat the initial rainwater and the later rainwater, thereby reducing the pollution of rainwater runoff.

[0004] The object of the present invention is achieved as follows: a stepped wall-mounted rainwater runoff treatment device comprises: a wall-mounted structure (1), a primary filter tank (5), a secondary filter tank (7) and an initial rain box (11), wherein the primary filter tank (5) and the secondary filter tank (7) form a stepped filter tank in an upper and lower arrangement; the primary filter tank is divided into two parallel compartments, one compartment is filled with a graded gravel layer, referred to as the graded gravel layer compartment, and the other compartment is filled with a fine sand layer, referred to as the fine sand layer compartment, and a baffle (3) that can slide up and down is provided between the two compartments for separation, and when the baffle (3) slides up and down, the two compartments can be closed and connected; the primary filter tank (5) is fixed to the shore through the wall-mounted structure (1), the graded gravel layer compartment is close to the shore, and the fine sand layer compartment is far away from the shore; the graded gravel layer compartment is A first water hole (8a) is provided at the bottom, and a second water hole (8b) is provided at the bottom of the fine sand layer grid; a funnel-shaped water collection tray (17) having a large opening at the upper end and a small neck opening at the lower end is provided at the lower part of the graded gravel layer grid; the upper end of the water collection tray (17) encloses the first water hole (8a), so that water from the first water hole (8a) falls into the water collection tray (17); the lower end of the water collection tray (17) is sealedly connected to the initial rain box (11); an openable and closable water inlet valve (16) is provided at the lower end outlet of the water collection tray (17); the water inlet valve (16) is fixedly connected to one end of a transmission rod (15) corresponding to a rotating shaft for opening and closing the valve; the other end of the transmission rod (15) is provided with a fixed structure of a rotating pair (19) to transmit the water inlet valve. The door (16) corresponds to a valve opening and closing shaft that is perpendicular to the length direction of the moving rod (15); a float (12) is provided in the rain box (11); the first connecting rod (13) is a two-section folding rod, one section is vertically upright, and the other section is inclined, and the upper end of the vertical upright section is connected to the inclined section; the lower end of the first connecting rod (13) corresponding to the vertical upright section is fixedly connected to the float (12), and the other end of the inclined section is fixedly connected to the rotating structure of the rotating pair (19); one end of the second connecting rod (14) is fixedly connected to the rotating structure of the rotating pair (19), and the other end of the second connecting rod (14) is hingedly connected or slidably connected to the lower end of the baffle (3), and the second connecting rod (14) and the inclined upward section of the first connecting rod (13) are located on a line. On a straight line, when the float (12) moves upward to a certain position, the movable rod (15) can drive the rotating shaft of the water inlet valve (16) to rotate in one direction, thereby closing the valve (16); when the float (12) moves downward, the movable rod (15) can drive the rotating shaft of the water inlet valve (16) to rotate in another direction, thereby opening the valve (16); with the rotating pair (19) as a fulcrum, the first connecting rod (13) and the second connecting rod (14) are made into a seesaw structure, when the float (12) moves upward, the second connecting rod (14) can drive the baffle (3) to slide downward, and when the float (12) moves up and down, the second connecting rod (14) can drive the baffle (3) to slide upward;

[0005] Below the fine sand layer grid is a secondary filter tank (7), that is, below the second water hole (8b) is the secondary filter tank (7); the biomass carbon material is filled in the secondary filter tank (7), and a third water hole (8c) is provided at the bottom of the secondary filter tank (7); the third water hole (8c) can be directly connected to a discharge water body such as a river.

[0006] A valve (10) is provided at the bottom of the initial rain box (11), and the valve (10) is electrically connected to a control system, and the control system can control the opening and closing of the valve (10).

[0007] Furthermore, the primary filter trough and the secondary filter trough are of equal length and width, and the width is W. The primary filter trough is close to the bank, and the secondary filter trough is at a distance of W / 2 from the bank. The top of the secondary filter trough is close to the bottom of the primary filter trough.

[0008] Furthermore, the entire bottom of the first filter tank is provided with water permeable holes, and the bottom of the second filter tank is provided with a third water permeable hole in the W / 2 wide part close to the water body, that is, the third water permeable hole is provided in the W / 2 wide part away from the embankment.

[0009] Furthermore, an opening is provided at the bottom of the position where the baffle (3) is located in the primary filter tank, so that the baffle (3) can be inserted and passed through, and an upper and lower vertical slide groove is provided on the side of the position where the baffle (3) is located in the primary filter tank, so that the baffle (3) can slide in the slide groove; by adjusting the length ratio of the inclined section of the first connecting rod (13) and the length of the second connecting rod (14), the weight of the baffle (3), the buoyancy of the float, etc., when collecting initial rain, the baffle rises to isolate the graded gravel layer and the fine sand layer, preventing the initial rain from flowing into the fine sand layer; when the initial rain box no longer collects initial rain, the baffle falls, and rainwater flows from the graded gravel layer into the fine sand layer.

[0010] Furthermore, an impermeable cover is placed on the exposed biomass carbon material (i.e., the portion of the biomass carbon material without the primary filter tank) and the surface of the fine sand layer to isolate rainwater from the treatment materials and prevent excessive rainwater runoff from causing mixing of filter materials in the primary and secondary filter tanks or leakage of filter materials.

[0011] The lower bottoms of the primary filter tank (5) and the secondary filter tank (7) are both provided with auxiliary support legs for supporting and fixing them on the river bottom.

[0012] The wall hanging device (1) is a device capable of fixing the side edge of the primary filter tank (5) to the shore.

[0013] At the beginning of rainfall, the water level in the primary rain box is low, and the valve between the graded gravel layer and the primary rain box is open. After the initial rainwater is filtered by the graded gravel layer, it flows directly into the primary rain box through the water collection tray; when the water level in the primary rain box reaches the highest water level, the valve between the graded gravel layer and the primary rain box is closed, and the rainwater runoff flows into the secondary filter tank through the permeable holes at the bottom of the fine sand layer, and the dissolved pollutants in the water are adsorbed and intercepted by the biomass carbon material. Similarly, the rainwater treated by the biomass carbon material is discharged into the receiving water bodies such as rivers and lakes through the permeable holes at the bottom of the secondary filtration device.

[0014] The beneficial effects of the present invention are as follows: the present invention reduces the occupation of the water bank area through the wall-mounted structure, and sequentially filters the rainwater runoff through multiple filter tanks arranged in a stepped manner and filled with biomass carbon materials, fully considering the water quality characteristics after each level of filtration, and reducing the use of chemical agents. The present invention provides an economical and environmentally friendly way for urban rainwater runoff pollution control. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 is a cross-sectional schematic diagram of the system described in Embodiment 1 of the present invention;

[0017] Figure 2 This is the connection diagram of the float and baffle.

[0018] 1 wall hanging device, 2 graded gravel layer, 3 baffle, 4 fine sand layer, 5 primary filter tank, 6 biomass carbon material, 7 secondary filter tank, 8a first water permeable hole, 8b second water permeable hole, 8c third water permeable hole, 9a first auxiliary support leg, 9b second auxiliary support leg, 10 drainage valve, 11 initial rain box, 12 float, 13 first connecting rod, 14 second connecting rod, 15 transmission rod, 16 water inlet valve, 17 water collecting tray, 18 embankment, 19 rotating pair, 20a first impermeable cover plate, 20b second impermeable cover plate. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with examples, but the present invention is not limited to the following examples.

[0020] Embodiment 1:

[0021] This embodiment is a stepped wall-mounted rainwater runoff treatment device. Figure 1 is a longitudinal section view of this embodiment, showing the relative position of the treatment device and the embankment and the treatment process; Figure 2 yes Figure 1Enlarged view of the middle part of the device. This embodiment includes: a primary filter tank 5 and a secondary filter tank 7 installed on the embankment 18. The primary filter tank 5 is connected to the embankment 18 through the wall hanging device 1, and the first auxiliary support leg 9a and the second auxiliary support leg 9b serve as auxiliary supports for the primary and secondary filter tanks. At the beginning of rainfall, the water level in the initial rain box 11 is low, the float 12 is located at the bottom of the initial rain box, the water inlet valve 16 is in an open state, and the baffle 3 is located between the graded gravel layer 2 and the fine sand layer 4. The initial rainwater filtered by the graded gravel layer 2 flows into the initial rain box 11 through the water permeable hole 8a and the water collection tray 17. When the water level in the initial rain box 11 reaches the set maximum water level, the float 12 floats up to drive the connecting rod 13 to rotate, and the water inlet valve 16 is closed through the transmission rod 15 with the transmission pair 19 as the fulcrum, and the baffle 3 is pulled down through the connecting rod 14, so that the water flow can directly flow into the fine sand layer 4 through the graded gravel layer 2. Then it flows into the biomass carbon material 6 through the water-permeable hole 8b at the bottom of the primary filter tank 5, and finally flows into the river from the water-permeable hole 8c at the bottom of the secondary filter tank 7. In the later stage of rainfall, the rainfall is large, and part of the rainwater overflows the graded gravel layer 2, and flows directly into the river through the first impermeable cover plate 20a and the second impermeable cover plate 20b in turn. The drain valve 10 at the bottom of the initial rain box is connected to the urban sewage network. After the rainfall ends, the drain valve 10 is opened to discharge the collected initial rainwater to the sewage plant for unified treatment.

[0022] The water depth of the river where the device is installed is H, the superelevation is D, and the length of the river bank that can be continuously laid is B; the length of the first and second filter tanks is L, the width is W, and the height is h. Then the height h of a single filter tank can be D / 2, and the length of the filter tank L is equal to the length B of the river bank that can be continuously laid. The size of the initial rain box is determined by combining the size of the filter tank and the initial rain situation. Its length L t The same length as the filter tank, which is the continuous length of the river bank B; height H t =H+Dh; the width is determined by the initial rain volume. Let the rainwater confluence area corresponding to the continuous layout length B be A, and the initial rain runoff thickness be K (usually K=4~8mm), then the initial rain abandoned flow volume V=AK. Correspondingly, the initial rain box width W t V / (L t H t ) and W / 2, whichever is greater.

[0023] The key to this embodiment lies in the coordinated working mode of the primary and secondary filter tanks and the initial rain box, that is, at the initial stage of rainfall, the valve is opened, and the initial rainwater with high pollutant content is stored in the initial rain box; in the later stage of rainfall, the valve is closed, and the rainwater is first filtered out of large particle pollutants by graded gravel and fine sand, and then the soluble pollutants are adsorbed by biomass carbon materials, thereby avoiding heavily polluted initial rainwater from flowing into the river, thereby ensuring the treatment effect of the primary and secondary filter tanks.

[0024] The secondary filter tank described in this embodiment is equal to the primary filter tank in length and width, and its river bank side is aligned with the primary filter tank baffle, ensuring that all water produced by the primary treatment filter tank can flow into the secondary filter tank and have sufficient filtration time in the secondary filter tank, thereby ensuring the treatment effect.

[0025] Embodiment 2:

[0026] This embodiment is an improvement of the embodiment 1, and is an improvement of the drain valve of the embodiment 1. An online controller is provided at the drain valve, and the opening and closing state of the drain valve is controlled by the host computer. The drain valve is combined with the float ball, which can better control the water level of the initial rain box and the time for storing the initial rain.

Claims

1. A stepped wall-mounted rainwater runoff treatment device, characterized in that: include: The invention relates to a wall-mounted structure (1), a primary filter tank (5), a secondary filter tank (7) and an initial rain box (11). The primary filter tank (5) and the secondary filter tank (7) are formed into a stepped filter tank. The primary filter tank is divided into two parallel grids. One grid is filled with a graded gravel layer, referred to as the graded gravel grid, and the other grid is filled with a fine sand layer, referred to as the fine sand grid. A baffle (3) that can slide up and down is provided between the two grids to separate them. When the baffle (3) slides up and down, the two grids can be closed and connected. The primary filter tank (5) is fixed to the shore through the wall-mounted structure (1). The graded gravel grid is close to the shore, and the fine sand grid is far away from the shore. The bottom of the graded gravel grid is provided with a first water hole (8a), and the bottom of the fine sand grid is provided with a first water hole (8a). The first water hole (8a) is sealed with a first rain box (11); the outlet at the lower end of the water storage tray (17) is provided with an openable and closable water inlet valve (16); the water inlet valve (16) is fixedly connected to one end of a transmission rod (15) corresponding to a rotating shaft for opening and closing the valve; the other end of the transmission rod (15) is provided with a fixed structure of a rotating pair (19); the rotating shaft for opening and closing the water inlet valve (16) is fixedly connected to one end of a transmission rod (15); ... The length direction of the rod (15) is vertical; a floating ball (12) is arranged in the initial rain box (11); the first connecting rod (13) is a two-section folding rod, one section is vertically upright, and the other section is inclined, and the upper end of the vertical upright section is connected to the inclined section; the lower end of the first connecting rod (13) corresponding to the vertical upright section is fixedly connected to the floating ball (12), and the other end of the inclined section is fixedly connected to the rotating structure of the rotating pair (19); one end of the second connecting rod (14) is fixedly connected to the rotating structure of the rotating pair (19), and the other end of the second connecting rod (14) is hingedly connected or slidably connected to the lower end of the baffle (3), and the second connecting rod (14) and the inclined upward section of the first connecting rod (13) are located on a straight line, so that the floating ball When the floating ball (12) moves upward to a certain position, the movable rod (15) can drive the rotating shaft of the water inlet valve (16) to rotate in one direction, thereby closing the valve (16); when the floating ball (12) moves downward, the movable rod (15) can drive the rotating shaft of the water inlet valve (16) to rotate in the other direction, thereby opening the valve (16); with the rotating pair (19) as a fulcrum, the first connecting rod (13) and the second connecting rod (14) are formed into a seesaw structure, when the floating ball (12) moves upward, the second connecting rod (14) can drive the baffle (3) to slide downward, and when the floating ball (12) moves up and down, the second connecting rod (14) can drive the baffle (3) to slide upward; Below the fine sand layer grid is a secondary filter tank (7), that is, below the second water hole (8b) is the secondary filter tank (7); the biomass carbon material is filled in the secondary filter tank (7), and a third water hole (8c) is provided at the bottom of the secondary filter tank (7); and the discharge water body is directly connected below the third water hole (8c).

2. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: The first-level filter tank and the second-level filter tank are of equal length and width, and the width is W. The first-level filter tank is close to the embankment, and the distance between the second-level filter tank and the embankment is W / 2. The top of the second-level filter tank is close to the bottom of the first-level filter tank; The entire bottom of the first filter tank is provided with water-permeable holes, and the bottom of the second filter tank is provided with a third water-permeable hole in the W / 2 wide part close to the water body, that is, the third water-permeable hole is provided in the W / 2 wide part away from the embankment.

3. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: An opening is provided at the bottom of the first-stage filter tank where the baffle (3) is located, so that the baffle (3) can be inserted through, and a vertical sliding groove is provided on the side of the first-stage filter tank where the baffle (3) is located, so that the baffle (3) can slide in the sliding groove.

4. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: By adjusting the length ratio of the inclined section of the first connecting rod (13) and the length of the second connecting rod (14), the weight of the baffle (3), and the buoyancy of the floating ball, when collecting initial rain, the baffle rises to isolate the graded gravel layer and the fine sand layer, preventing the initial rain from flowing into the fine sand layer; when the initial rain box no longer collects initial rain, the baffle falls, and rainwater flows from the graded gravel layer into the fine sand layer.

5. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: An impermeable cover is placed on the exposed biomass carbon material, i.e., the portion of the biomass carbon material without the primary filter tank and the surface of the fine sand layer to isolate rainwater from the treatment material and prevent excessive rainwater runoff from causing mixing of filter materials in the primary and secondary filter tanks or leakage of filter materials.

6. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: The lower bottoms of the primary filter tank (5) and the secondary filter tank (7) are both provided with auxiliary support legs for supporting and fixing them on the river bottom.

7. A stepped wall-mounted rainwater runoff treatment device according to claim 1, characterized in that: A valve (10) is provided at the bottom of the initial rain box (11), and the valve (10) is electrically connected to a control system, and the control system can control the opening and closing of the valve (10).

8. A method for treating rainwater using a stepped wall-mounted rainwater runoff treatment device according to any one of claims 1 to 7, characterized in that: At the beginning of rainfall, the water level in the initial rain box is low, and the valve between the graded gravel layer and the initial rain box is in an open state. After the initial rainwater is filtered by the graded gravel layer, it flows directly into the initial rain box through the water collection tray; when the water level in the initial rain box reaches the highest water level, the valve between the graded gravel layer and the initial rain box is closed, and the rainwater runoff flows into the secondary filter tank through the permeable holes at the bottom of the fine sand layer, and the dissolved pollutants in the water are adsorbed and intercepted by the biomass carbon material; Similarly, rainwater treated with biomass carbon materials is discharged into receiving water bodies such as rivers and lakes through the permeable holes at the bottom of the secondary filtration device.

Images