A rainwater storage tank flushing and silting simulator modified from an SBR biological pool and its use method

Abstract

The present invention discloses a rainwater storage tank flushing and silting simulator modified from an SBR biological pool and a method of using the simulator, including a flushing tank, a tank upper bracket and a tank lower bracket; the flushing tank includes a water storage area, a water storage and flushing area, and a mud discharge area; a slot is provided between the water storage area and the water storage and flushing area, and the water level and the size of the flushing hole are adjusted by setting a plug plate in the slot; a partition is provided below the slot; an opening is provided at a position of the partition near the bottom of the water storage area and the water storage and flushing area; a pressure valve is provided on the opening to control the opening and closing of the pressure valve using a cylinder to provide a power source; a mud discharge valve is provided in the mud discharge area; and the tank lower bracket is an adjustable bracket. When in use, the standing time of the storage tank, the liquid level height of the water storage area and the water storage and flushing area, and the slope of the water storage and flushing area are adjusted as needed, and hydraulic parameters are collected during the flushing process. The application of the present invention can obtain engineering design parameters more accurately, greatly reduce engineering design risks, and save costs.

Description

Technical Field

[0001] The invention relates to the technical field of gravity flushing simulation test, and in particular to a rainwater storage tank flushing and silting simulator modified from an SBR biological pool and a use method thereof. Background Art

[0002] With the rapid development of social economy, some small and medium-sized sewage treatment plants built in the 1970s and 1990s in the central urban areas of cities are gradually surrounded by commercial and residential areas formed by urban development. The wastewater, waste gas and other pollutants generated during the operation of these sewage treatment plants will have an adverse impact on the living environment of surrounding residents and the improvement of water environment quality.

[0003] In view of the actual needs of water environment governance, some cities have issued relevant planning policies to clarify that the concept of water environment governance will shift from end-of-pipe governance to system governance, and will gradually form a full-process, all-round sewage treatment system covering the source, process and end.

[0004] Under this policy background, if we can take advantage of the layout of the central urban sewage system to optimize and adjust the existing small and medium-sized sewage treatment plants into initial rainwater storage tanks to serve the surrounding rainwater systems, this will not only effectively solve the conflicts between the small and medium-sized sewage treatment plants in the central urban area and the surrounding plants, but also use rainwater storage tanks to collect initial rainwater, effectively improving the water environment quality of urban rivers.

[0005] However, as an effective engineering measure to control initial rainwater pollution, whether the rainwater storage tank system can timely and effectively remove the silt in the tank is an important factor affecting the effective pool capacity of the storage tank and whether its storage and regulation effect can be effectively exerted.

[0006] Since the initial rainwater runoff carries organic pollutants and other impurities deposited on the ground and in pipes, the initial rainwater storage tank will inevitably retain deposited debris and accumulate a certain thickness of silt at the bottom after use. After the initial rainwater is retained in the tank for several hours, if the suspended particles and organic pollutants and other impurities in the water are not cleaned up in time, the dirt will deteriorate and produce odor; and excessive accumulation of sediment will reduce the effective volume of the storage tank, causing the storage tank to lose its ability to regulate and store the initial rainwater and control pollution, and may also worsen the water inlet conditions of the water pump and change the flow pattern of the storage tank.

[0007] Therefore, in the design process of adjusting the function of the existing treatment facilities of the sewage treatment plant to a rainwater storage tank, there is an urgent need for a simulation method or simulation device to assist in the design and verification of the size selection and scouring and silting effect of the modified rainwater storage tank. Summary of the invention

[0008] In view of the above-mentioned defects of the prior art, the present invention provides a rainwater storage tank flushing and silting simulator converted from an SBR biological pool and a method for using the same, the purpose of which is to simulate the anti-silting and flushing and silting effects after the existing sewage treatment structure is converted into a storage facility, and to obtain corresponding selection design parameters and dimensions through flushing and silting simulation tests under different working conditions, and to verify the flushing and silting effects of the reformed rainwater storage tank, so as to effectively evaluate the improvement effect on the environmental impact after the sewage treatment facility is transformed into a rainwater storage facility.

[0009] To achieve the above-mentioned purpose, the present invention discloses a rainwater storage tank flushing and silting simulator modified from an SBR biological pool, including a flushing tank.

[0010] Wherein, an upper sink bracket is provided at one end of the flushing sink, and a lower sink bracket is provided below;

[0011] The flushing water tank includes a water storage area, a water storage and flushing area, and a mud discharge area in sequence along the length direction;

[0012] A slot is provided between the water storage area and the water storage and flushing area, and a plug plate is provided in the slot and connected to the slot in a movable manner to adjust the water level of the water storage area and the size of the flushing hole formed between the lower edge of the plug plate and the bottom of the slot;

[0013] Between the water storage area and the water storage and flushing area, a partition is provided below the slot, and the water storage area and the water storage and flushing area are separated by the partition;

[0014] The partition is provided with an opening near the water storage area and the bottom of the water storage and flushing area; the opening is provided with a pressure valve which uses a cylinder to provide a power source to control the opening and closing of the pressure valve;

[0015] The mud discharge area is provided with a mud discharge valve;

[0016] At least two spiral lifting supports are arranged between the lower support of the water trough and one end of the water storage area of ​​the flushing water trough, and are connected to one end of the mud discharge area of ​​the flushing water trough by a hinge to form a rotary pair.

[0017] Preferably, a hinge connection is formed between the pressure door of the pressure valve and the partition;

[0018] The piston and cylinder body of the cylinder are respectively connected to the pressure door and the side wall of the flushing water tank through a transmission rod to form a slider swing mechanism;

[0019] When the piston of the cylinder expands and contracts relative to the cylinder body, the pressure door is driven to swing relative to the partition.

[0020] More preferably, the cylinder and the side wall of the flushing trough are connected by a rotary pair via the transmission rod and the fixed cross frame.

[0021] Preferably, a plurality of universal wheels are provided below the lower support of the sink.

[0022] The present invention also provides a method for using a rainwater storage tank flushing and silting simulator modified from an SBR biological pool, the steps of which are as follows:

[0023] Step 1: According to the water storage position or water storage height to be simulated and tested, the position and height of the partition between the water storage area and the water storage and flushing area are adjusted; after adjustment, the partition and the height of the partition are fixed, and the pressure valve is closed;

[0024] Step 2: According to the inclination of the scouring slope to be simulated and tested, adjust the spiral lifting support under the lower bracket of the water tank to the required slope;

[0025] Step 3, inputting rainwater containing a certain amount of dust and sand or directly using the collected initial rainwater into the water storage area and the water storage and flushing area;

[0026] After the liquid level gradually rises to any height to be tested, close the water inlet and let it stand for a while. The specific time interval can be set according to the actual simulation needs, usually a few hours to a few days;

[0027] Step 4: After standing for a preset time, open the pressure door of the pressure valve to drain the water in the water storage area to the water storage and flushing area;

[0028] At the same time, the mud discharge valve of the mud discharge area is opened, and the mud deposited in the water storage area and flushing area is washed up by the water flow of the water storage area and brought into the mud discharge area, and then discharged through the mud discharge valve;

[0029] Step 5: After all the water in the water storage area has been flushed, the pressure valve and the mud discharge valve of the pressure valve are closed;

[0030] Step 6, collecting hydraulic parameters during steps 1 to 5;

[0031] Step 7: Repeat steps 1 to 6 until all the hydraulic parameters are collected.

[0032] Preferably, a mud storage barrel is provided at the mud discharge valve; the mud storage barrel is used to store mixed mud water containing silt when performing the flushing procedure.

[0033] Preferably, the hydraulic parameters include hydraulic loss and flushing end speed.

[0034] Beneficial effects of the present invention:

[0035] The present invention is established based on the actual SBR biological pool type and size of the sewage treatment plant, and is simulated and reduced according to the geometric similarity and gravity similarity criteria. The water storage area position, water storage height and flushing area slope are adjustable and variable, which can be used for simulation verification before the actual project is implemented. The accurate engineering design parameters obtained can greatly reduce the engineering design risk and save costs.

[0036] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic structural diagram of an embodiment of the present invention is shown.

[0038] Figure 2 A schematic diagram of the longitudinal cross-sectional structure of an embodiment of the present invention is shown.

[0039] Figure 3 A schematic diagram of a top view of an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0040] Example

[0041] like Figures 1 to 3 As shown, a rainwater storage tank siltation simulator modified from an SBR biological pool includes a flushing tank 1.

[0042] Among them, an upper sink bracket 2 is provided at one end of the flushing sink 1, and a lower sink bracket 3 is provided below;

[0043] The flushing tank 1 includes a water storage area 4, a water storage and flushing area 5, and a mud discharge area 6 in sequence along the length direction;

[0044] A slot 7 is provided between the water storage area 4 and the water storage and flushing area 5. The water level of the water storage area 4 and the size of the flushing hole formed between the lower edge of the slot 7 and the bottom of the slot 7 are adjusted by arranging a plug plate in the slot 7 and connected to the slot 7 in a movable pair.

[0045] Between the water storage area 4 and the water storage and flushing area 5, a partition plate 8 is provided below the slot 7, and the water storage area 4 and the water storage and flushing area 5 are separated by the partition plate 8;

[0046] The partition 8 is provided with an opening near the bottom of the water storage area 4 and the water storage and flushing area 5; the opening is provided with a pressure valve 9 which uses a cylinder 11 to provide a power source to control the opening and closing of the pressure valve;

[0047] The mud discharge area 6 is provided with a mud discharge valve 15;

[0048] At least two spiral lifting supports 12 are arranged between the lower support 3 of the water trough and one end of the water storage area 4 of the flushing water trough 1 , and are connected to one end of the mud discharge area 6 of the flushing water trough 1 by a hinge 15 to form a rotary pair.

[0049] The principle of the present invention is as follows:

[0050] In view of the special type of the original SBR biological pool in the sewage treatment plant, which is as long as 120 meters, there will be technical difficulties in scouring and silting up or incomplete scouring and silting up during the functional transformation process. Therefore, a rainwater storage pool scouring and silting up simulation device system with adjustable gravity flushing and variable water level heights in the storage area, water storage volume and impact surface slope in the scouring area was produced.

[0051] The present invention can be used to test the hydraulic scouring effect of the original SBR biological pool transformed into a rainwater storage pool. The corresponding hydraulic parameters are obtained by changing the water level, water volume and inclination of the water storage pool, so as to assist in determining the selection design parameters of the water storage retaining wall and the like during the design process, and verify the scouring and silting effect of the transformed rainwater storage pool.

[0052] In practical applications, according to relevant fluid mechanics principles, the original ordered batch SBR biological pool is scaled down at a ratio of 1:10 to 1:20, and the position of the water storage area 4, the water storage water level height and the inclination of the impact surface of the scouring area are set to be adjustable.

[0053] In some embodiments, a hinge connection is formed between the pressure door of the pressure valve 9 and the partition 8;

[0054] The piston and cylinder body of the cylinder 11 are respectively connected to the pressure door and the side wall of the flushing tank 1 through a transmission rod to form a slider swing mechanism;

[0055] When the piston of the cylinder 11 expands and contracts relative to the cylinder body, the pressure door is driven to swing relative to the partition 8.

[0056] In some embodiments, the cylinder 11 is connected to the side wall of the flushing tank 1 by a rotary pair via a transmission rod and a fixed cross frame 10 .

[0057] In some embodiments, a plurality of universal wheels 13 are provided below the lower support 3 of the sink.

[0058] The present invention also provides a method for using a rainwater storage tank flushing and silting simulator modified from an SBR biological pool, the steps of which are as follows:

[0059] Step 1, according to the water storage position or water storage height to be simulated and tested, adjust the position and height of the partition 8 between the water storage area 4 and the water storage and flushing area 5; after adjustment, fix the height of the partition 8 and close the pressure valve 9;

[0060] Step 2: According to the inclination of the scouring slope to be simulated and tested, adjust the spiral lifting support 12 under the lower bracket 3 of the water tank to the required slope;

[0061] Step 3, inputting rainwater containing a certain amount of dust and sand or directly using the collected initial rainwater into the water storage area 4 and the water storage and flushing area 5;

[0062] After the liquid level gradually rises to any height to be tested, close the water inlet and let it stand for a while. The specific time interval can be set according to the actual simulation needs, usually a few hours to a few days;

[0063] Step 4: After standing for a preset time, open the pressure valve 9 to drain the water in the water storage area 4 to the water storage and flushing area 5;

[0064] At the same time, the mud discharge valve of the mud discharge area 6 is opened, and the water flow of the water storage area 4 flushes the sludge deposited in the water storage and flushing area 5 and brings it into the mud discharge area 6 and then discharges it through the mud discharge valve;

[0065] Step 5: After all the water in the water storage area 4 is flushed, the pressure valve and the mud discharge valve of the pressure valve 9 are closed;

[0066] Step 6, collecting hydraulic parameters during steps 1 to 5;

[0067] Step 7: Repeat steps 1 to 6 until all hydraulic parameters are collected.

[0068] The present invention can intuitively simulate the hydraulic flushing effect of the silt in the regulating reservoir. It can also adjust the standing time of the regulating reservoir, the position of the water storage area 4, the liquid level height of the water storage area 4, the slope of the flushing area, and even the material of the bottom of the regulating reservoir according to the test needs. By repeating the above-mentioned operation steps 1 to 6, a batch of "water storage-flushing-re-water storage" full-process rainwater regulating reservoir silt flushing simulation is completed, and the parameters to be obtained by testing and calculating are used for auxiliary design and simulation verification before the implementation of the engineering project to reduce the engineering design risk.

[0069] In some embodiments, a mud storage barrel is provided at the mud discharge valve; the mud storage barrel is used to store mixed mud water containing silt when performing the flushing procedure.

[0070] In certain embodiments, the hydraulic parameters include hydraulic loss and flush tip velocity.

[0071] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A rainwater storage tank flushing and silting simulator modified from an SBR biological pool, characterized in that: It comprises a flushing water tank (1); an upper water tank bracket (2) is provided at one end of the flushing water tank (1), and a lower water tank bracket (3) is provided below; The flushing water tank (1) comprises a water storage area (4), a water storage and flushing area (5), and a mud discharge area (6) in sequence along the length direction; A slot (7) is provided between the water storage area (4) and the water storage and flushing area (5), and a plug plate is provided in the slot (7) and connected to the slot (7) in a movable manner to adjust the water level of the water storage area (4) and the size of the flushing hole formed between the lower edge of the plug plate and the bottom of the slot (7); Between the water storage area (4) and the water storage and flushing area (5), a partition (8) is provided below the slot (7), and the water storage area (4) and the water storage and flushing area (5) are separated by the partition (8); The partition (8) is provided with an opening near the bottom of the water storage area (4) and the water storage and flushing area (5); the opening is provided with a pressure valve (9) which uses a cylinder (11) to provide a power source to control the opening and closing of the pressure valve; The mud discharge area (6) is provided with a mud discharge valve (15); At least two spiral lifting supports (12) are provided between the lower support (3) of the water trough and one end of the water storage area (4) of the flushing trough (1), and are connected to one end of the mud discharge area (6) of the flushing trough (1) through a hinge (15) to form a rotary pair.

2. The rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 1, characterized in that: The pressure door of the pressure valve (9) is hingedly connected to the partition (8); The piston and cylinder body of the cylinder (11) are respectively connected to the pressure door and the side wall of the flushing water tank (1) through a transmission rod to form a slider swing mechanism; When the piston of the cylinder (11) expands and contracts relative to the cylinder body, the pressure door is driven to swing relative to the partition (8).

3. The rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 2, characterized in that: The cylinder (11) and the side wall of the flushing water tank (1) are connected to each other via a rotary pair formed by the transmission rod and the fixed cross frame (10).

4. The rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 1, characterized in that: A plurality of universal wheels (13) are arranged below the water tank lower bracket (3).

5. The method for using the rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 1, comprising the following steps: Step 1, according to the water storage position or water storage height to be simulated and tested, adjust the position and height of the partition (8) between the water storage area (4) and the water storage and flushing area (5); after adjustment, fix the height of the partition (8) and close the pressure valve (9); Step 2: According to the inclination of the scouring slope to be simulated and tested, the spiral lifting support (12) below the water tank lower support (3) is adjusted to the required slope; Step 3, inputting rainwater containing a certain amount of dust and sand or directly using the collected initial rainwater into the water storage area (4) and the water storage and flushing area (5); After the liquid level gradually rises to any height to be tested, close the water inlet and let it stand for a while. The specific time interval can be set according to the actual simulation needs, usually a few hours to a few days; Step 4: After standing for a preset time, open the pressure gate of the pressure valve (9) to drain the water in the water storage area (4) to the water storage and flushing area (5); At the same time, the mud discharge valve of the mud discharge area (6) is opened, and the mud deposited in the water storage area (4) is washed up by the water flow and brought into the mud discharge area (6) and then discharged through the mud discharge valve; Step 5: After all the water in the water storage area (4) has been flushed, the pressure valve and the mud discharge valve of the pressure valve (9) are closed; Step 6, collecting hydraulic parameters during steps 1 to 5; Step 7: Repeat steps 1 to 6 until all the hydraulic parameters are collected.

6. The method for using the rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 5, characterized in that: A mud storage barrel is arranged at the mud discharge valve; the mud storage barrel is used to store mixed mud water containing silt when performing the flushing procedure.

7. The method for using the rainwater storage tank flushing and silting simulator converted from an SBR biological pool according to claim 5, characterized in that: The hydraulic parameters include hydraulic loss and flushing end velocity.

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