Urban rainwater treatment system

Abstract

The utility model relates to the technical field of sewage treatment, in particular to an urban rainwater treatment system which comprises a water inlet pipe, a water inlet well, a primary filter tank, a secondary filter tank, a high filter tank, a garbage treatment facility, a silt treatment facility and a controller. Pollutants in the rainwater are removed by utilizing multi-stage filtration, so that the urban rainwater can be quickly discharged up to the standard. The urban rainwater treatment system has the advantages that the urban rainwater treatment system is simple in structure, low in investment and low in operation energy consumption, rainwater filtering and discharging functions can be stably achieved, the size of the treatment system can be changed according to actual conditions such as rainfall frequency and rainfall capacity, multiple groups of treatment systems can be arranged, and the urban rainwater treatment system is convenient and flexible to use. The device can be arranged in different receiving water bodies such as river channels, artificial lakes and wetlands.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an urban rainwater treatment system. Background Art

[0002] With the advancement of urbanization, the load of urban sewage treatment plants is constantly increasing. Implementing rainwater-sewage separation and treating rainwater separately can not only reduce the treatment load of sewage treatment plants and the cost of sewage treatment, but also accelerate the discharge of urban rainwater, prevent urban waterlogging, and promote the utilization of rainwater resources and ecological environment protection.

[0003] Rainwater often carries impurities such as tree branches, leaves, garbage, and sediment. Moreover, due to irregular rainfall and large rainfall variations, the rainwater treatment system cannot operate continuously, the equipment is easily damaged, the maintenance cost of facilities is high, and the treatment efficiency of the system will decrease whether the rainfall is too large or too small. Summary of the Invention

[0004] (I) Purpose of the Utility Model

[0005] To solve the problems in the background art, the utility model proposes an urban rainwater treatment system.

[0006] (II) Technical Solution: The utility model provides an urban rainwater treatment system, which includes an inlet pipe, an inlet well, a primary filtration tank, a secondary filtration tank, a high-level filtration tank, a garbage treatment facility, a sediment treatment facility, and a controller. The inlet pipe is connected to the inlet well, and a garbage treatment facility is arranged above the inlet well. A lifting device is installed in the garbage treatment facility, and an L-shaped grille is arranged in the inlet well, and the L-shaped grille is connected to the lifting device. A sludge hopper is arranged below the inlet well, and the sludge hopper is communicated with the sediment treatment facility through a sludge pipeline. An outlet sludge valve and a sludge flowmeter are installed at one end of the sludge pipeline close to the sediment treatment facility, and the sludge flowmeter is connected to the controller through a signal line. The bottom of the pool wall of the inlet well is connected to the primary filtration tank through a primary inlet valve. The primary filtration tank is provided with primary filter media, and is connected to the secondary filtration tank through a secondary inlet in the middle of the pool wall, and is connected to the high-level filtration tank through a high-level inlet valve at the upper part of the pool wall. The secondary filtration tank is provided with secondary filter media and a low-level outlet valve. The high-level filtration tank is provided with high-flow filter media and a high-level outlet valve. An inlet flowmeter is installed on the inlet pipe, and the inlet flowmeter is connected to the controller through a signal line. The primary inlet valve, the high-level inlet valve, the low-level outlet valve, and the high-level outlet valve are connected to the controller through signal lines. The sediment treatment facility and the outlet sludge valve are connected to the controller through signal lines.

[0007] Preferably, the primary filter media are volcanic rocks, ceramsites, pumices or fiber ball filter media with a particle size of 5-8 cm, which are fixed in the middle part of the primary filter tank by upper and lower isolation nets. The lower isolation net is located above the primary water inlet valve, and the upper isolation net is located below the high-level water inlet. An isolation net is arranged between the primary filter media and the secondary water inlet to prevent the filter media from flowing out with the water flow.

[0008] Preferably, the secondary filter media are quartz sands or manganese sands with a particle size of 0.3-0.5 cm. An isolation net is arranged between the secondary filter media and the low-level water outlet valve to prevent the filter media from flowing out with the water flow.

[0009] Preferably, the high-flow filter media in the high-level filter tank are anthracites, shale ceramsites or manganese sand filter media with a particle size of 2-3 cm. Isolation nets are arranged between the high-flow filter media and the high-level water inlet valve and the high-level water outlet valve.

[0010] Preferably, the sediment treatment facility includes a sludge suction pump and sediment filtering equipment. The sludge suction pump is connected to a sludge pipeline, and the sludge outlet of the sludge suction pump is located above the sediment filtering equipment. A sludge outlet valve is installed on the sludge pipeline at the front end of the sludge suction pump. The sludge suction pump is connected to the controller through a signal line. The sediment filtering equipment removes the moisture in the sediment through a filter plate, facilitating the external transportation and disposal of the sediment.

[0011] Preferably, the lifting device in the garbage treatment facility is connected to the controller and automatically transports the garbage intercepted by the L-shaped grille to the garbage treatment facility for treatment after each rainwater treatment.

[0012] Preferably, a control program is set in the controller, setting the minimum rainfall value and the maximum rainfall value. The inlet pipe flowmeter transmits the inlet water flow to the controller, and the controller controls the opening and closing of the valves according to the flow rate. When the flow rate reaches the minimum rainfall value, the valves of the primary water inlet and the low-level water outlet are opened. When the flow rate reaches the maximum rainfall value, the high-level water inlet and the high-level water outlet valves are opened. When the flow rate drops to zero, the high-level water inlet, the high-level water outlet and the low-level water outlet valves are closed, the sludge suction pump and the sediment treatment device are started, the lifting device is controlled to lift the L-shaped grille to the garbage treatment facility, and after the garbage is transported out, the L-shaped grille is put back into the water inlet well. When the L-shaped grille returns to the water inlet well, the sludge outlet valve and the sediment treatment facility are opened. After the sediment in the mud collecting hopper is treated, the sludge flowmeter feeds back a no-flow signal to the controller, and the controller closes the sediment treatment facility and the sludge outlet valve.

[0013] The above technical solution of the present utility model has the following beneficial technical effects:

[0014] The urban rainwater treatment system has a simple structure, low investment, and low operating energy consumption. It can stably realize its rainwater filtration and discharge functions. It can change the size of the treatment system according to actual conditions such as rainfall frequency and rainfall amount, and can be set in multiple groups, which is convenient and flexible. It can be set in different receiving water bodies such as rivers, artificial lakes, and wetlands. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the sediment treatment facility in the present utility model.

[0017] Reference Numerals:

[0018] 1 Inlet pipe, 2 Inlet well, 3 Primary filtration tank, 4 Secondary filtration tank, 5 High-level filtration tank, 6 Garbage treatment facility, 7 Sediment treatment facility, 8 Inlet flowmeter, 9 Mud collecting hopper, 10 Sludge pipeline, 11 Controller, 12 L-shaped grille, 13 Lifting device, 14 Primary inlet valve, 15 High-level inlet valve, 16 Secondary inlet, 17 Low-level outlet valve, 18 High-level outlet valve, 19 Mud outlet valve, 20 Sludge flowmeter, 21 Primary filter material, 22 Secondary filter material, 23 High-flow filter material, 701 Sludge pump, 702 Mud outlet pipeline, 703 Filter plate, 704 Filtration tank, 705 Sediment bucket. Detailed Embodiments

[0019] The following further describes in detail the technical solutions in the embodiments of the present utility model in conjunction with the specific embodiments of the present utility model and with reference to the drawings. It should be understood that the described embodiments are only exemplary and do not limit the scope of the present utility model. In addition, in the following description, the existing equipment structures and technologies will not be expanded to define the concept of the present utility model.

[0020] As Figure 1As shown in the figure, a municipal rainwater treatment system proposed by the present utility model includes a water inlet pipe 1, a water inlet well 2, a primary filtration tank 3, a secondary filtration tank 4, a high-level filtration tank 5, a garbage treatment facility 6, a sediment treatment facility 7, a water inlet flowmeter 8, a sludge hopper 9, a sludge pipeline 10, a controller 11, an L-shaped grille 12, a lifting device 13, a primary water inlet valve 14, a high-level water inlet valve 15, a secondary water inlet 16, a low-level water outlet valve 17, a high-level water outlet valve 18, a sludge outlet valve 19, and a sludge flowmeter 20. The water inlet pipe 1 is connected to the water inlet well 2. The water inlet well 2 is connected to the primary filtration tank 3 through the primary water inlet valve 14. The primary filtration tank 3 is connected to the secondary filtration tank 4 through the secondary water inlet 16 and to the high-level filtration tank 5 through the high-level water inlet valve 15. A low-level water outlet valve 17 is installed at the outlet of the secondary filtration tank 4, and a high-level water outlet valve 18 is installed at the outlet of the high-level filtration tank 5. A water inlet flowmeter 8 is installed on the water inlet pipe 1, and the water inlet flowmeter 8 is connected to the controller 11 through a signal line. An L-shaped grille 12 is installed in the water inlet well 2, and the L-shaped grille 12 is connected to the lifting device 13. The lifting device 13 is installed in the garbage treatment facility 6. A sludge hopper 9 is provided at the bottom of the water inlet well 2, and the sludge hopper 9 is connected to the sediment treatment facility 7 through the sludge pipeline 10. A sludge outlet valve 19 is installed at one end of the sludge pipeline 10 close to the sediment treatment facility 7. The controller 11 is connected to the primary water inlet valve 14, the high-level water inlet valve 15, the low-level water outlet valve 17, the high-level water outlet valve 18, the sludge outlet valve 19, and the sludge flowmeter 20 through signal lines.

[0021] In this embodiment, as Figure 2 shown, the sediment treatment facility 7 includes a sludge pump 701, a filtration tank 704, and a sediment bucket 705. The sludge pipeline 10 is connected to the sludge pump 701. The sludge outlet pipeline 702 of the sludge pump 701 is located above the filtration tank 704. A filter plate 703 is installed in the filtration tank 704, and a sediment bucket 705 is placed below the end of the filter plate 703.

[0022] In this embodiment, as Figure 1 shown, the primary filter material 21 provided in the primary filtration tank 3 is ceramsite filter material with a particle size of 5 - 8 cm, which is fixed in the middle part of the primary filtration tank by upper and lower isolation nets. The lower isolation net is located above the primary water inlet valve 14, and the upper isolation net is located below the high-level water inlet valve 15. An isolation net is provided between the primary filter material 21 and the secondary water inlet 16 to prevent the filter material from flowing out with the water flow.

[0023] In this embodiment, as Figure 1 shown, the secondary filter material 22 provided in the secondary filtration tank 4 is quartz sand with a particle size of 0.3 - 0.5 cm. An isolation net is provided between the secondary filter material 22 and the low-level water outlet valve 17 to prevent the filter material from flowing out with the water flow.

[0024] In this embodiment, as Figure 1As shown, the high-flow filter media 23 provided in the high-level filter tank 5 is anthracite with a particle size of 2-3 cm. A separation net is provided between the high-flow filter media 23, the high-level water inlet valve 15, and the high-level water outlet valve 18.

[0025] In this embodiment, the sludge flowmeter 20 is an electromagnetic flowmeter.

[0026] The standard parts used in the present utility model can all be purchased from the market. Other accessories and pipe fittings can be customized according to the description in the specification. The specific connection methods of each part all adopt conventional means such as bolts and welding that are mature in the prior art. The machines, parts, and equipment all adopt conventional models in the prior art. Coupled with the circuit connection adopting the conventional connection method in the prior art, details are not described herein.

[0027] The above is only the preferred specific embodiment of the present utility model, which is only used for exemplary illustration or explanation of the principle of the present utility model, and does not limit the application form of the present utility model. Any modifications, equivalent replacements, improvements, etc. made according to the technical solution of the present utility model should all be covered within the protection scope of the present utility model. Enter the description paragraph of the invention content here.

Claims

1. A rainwater treatment system for a town, comprising a water inlet pipe (1), a water inlet well (2), a primary filter pool (3), a secondary filter pool (4), a high-level filter pool (5), a garbage treatment facility (6), a sediment treatment facility (7), and a controller (11), wherein: The water inlet pipe (1) is connected to the water inlet well (2). A garbage treatment facility (6) is arranged above the water inlet well (2). A lifting device (13) is installed in the garbage treatment facility (6). An L-shaped grille (12) is arranged in the water inlet well (2). The L-shaped grille (12) is connected to the lifting device (13). A mud collecting bucket (9) is arranged below the water inlet well (2). The mud collecting bucket (9) is connected to the mud treatment facility (7) through a mud pipe (10). A mud outlet valve (19) and a mud flow meter (20) are installed at one end of the mud pipe (10) close to the mud treatment facility (7). The mud flow meter (20) is connected to the controller (11) through a signal line. The bottom of the pool wall of the water inlet well (2) is connected to the primary filter pool (3) through a primary water inlet valve (14). A primary filter material ( 21), and connected to the secondary filter pool (4) through a secondary water inlet (16) in the middle of the pool wall, and connected to the high-level filter pool (5) through a high-level water inlet valve (15) at the upper part of the pool wall, the secondary filter pool (4) is provided with a secondary filter material (22), and is provided with a low-level water outlet valve (17), the high-level filter pool (5) is provided with a high-flow filter material (23), and is provided with a high-level water outlet valve (18), the water inlet flow meter (8) is installed on the water inlet pipe (1), the water inlet flow meter (8) is connected to the controller (11) through a signal line, the primary water inlet valve (14), the high-level water inlet valve (15), the low-level water outlet valve (17), and the high-level water outlet valve (18) are connected to the controller (11) through a signal line, and the sediment treatment facility (7) and the mud outlet valve (19) are connected to the controller (11) through a signal line.

2. A town rainwater treatment system according to claim 1, characterized in that: The silt treatment facility (7) comprises a sludge pump (701), a filter tank (704) and a silt bucket (705); a sludge pipeline (10) is connected to the sludge pump (701); a sludge outlet pipeline (702) of the sludge pump (701) is located above the filter tank (704); a filter plate (703) is installed in the filter tank (704); and a silt bucket (705) is placed below the end of the filter plate (703).

3. A town rainwater treatment system according to claim 1, characterized in that: The primary filter material (21) is a volcanic rock, ceramsite, pumice or fiber ball filter material with a particle size of 5-8 cm, and is fixed to the middle part of the primary filter tank (3) by upper and lower isolation nets, the lower isolation net being located above the primary water inlet valve (14), the upper isolation net being located below the high-position water inlet valve (15), and an isolation net being arranged between the primary filter material (21) and the secondary water inlet (16).

4. A town rainwater treatment system according to claim 1, characterized in that: The secondary filter material (22) is quartz sand or manganese sand with a particle size of 0.3-0.5 cm, and an isolation net is provided between the secondary filter material (22) and the low-position water outlet valve (17).

5. The urban rainwater treatment system according to claim 1 is characterized in that: The high-flow filter material (23) is anthracite, shale ceramsite or manganese sand filter material with a particle size of 2-3 cm. An isolation net is provided between the high-flow filter material (23) and the high-position water inlet valve (15) and the high-position water outlet valve (18).

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