Rainwater pipe for treating roof runoff pollution and method for treating roof runoff pollution

Abstract

The invention relates to a rainwater pipe for treating roof runoff pollution and a roof runoff pollution treatment method. The invention is suitable for the technical field of sewage treatment equipment. According to the technical scheme, the rainwater pipe for treating roof runoff pollution is characterized in that the rainwater pipe is provided with a pipe body, at least one pollution treatment module is arranged in the pipe body in the length direction of the pipe body, an overflow pipe is connected to the pipe body, and the two ends of the overflow pipe are connected to the two ends of the pollution treatment module on the pipe body respectively. Thus, initial rainwater on the roof flows into the pipe body at the initial stage of rainfall, the pollution treatment module can treat the initial rainwater, the pollution treatment module plays a role in slowing down the water flow in the pipe body at the middle and later periods of large rainwater flow, and the water flow in the pipe body can pass through the overflow pipe and is prevented from being blocked in the pipe body.

Description

Technical Field

[0001] The invention relates to a rainwater pipe for treating roof runoff pollution and a method for treating roof runoff pollution, and is applicable to the technical field of sewage treatment equipment. Background Art

[0002] Non-point source pollution is an important factor leading to the deterioration of urban water environment. It enters the water environment through surface runoff, soil erosion, farmland drainage, etc. Urban rainwater runoff is considered to be one of the main non-point source pollution in cities, because the direct discharge of urban rainwater will cause pollution to urban waters and lead to eutrophication of water bodies.

[0003] Among the urban rainwater runoff pollution, the roof runoff pollution problem is gradually worsening. Traditional stormwater management measures often cannot effectively control roof runoff pollution. Since the roof materials of most buildings in the city are asphalt or concrete, pollutants such as dust and heavy metals on the roof surface are washed away when rainwater runoff is formed, and eventually flow into the water body to cause pollution. Therefore, it is particularly important to explore measures to purify roof rainwater runoff.

[0004] At present, the more mature technologies for controlling roof runoff pollution include green roofs. In addition, there are some studies on the starting and ending devices of rainwater risers. However, these devices require a certain amount of land, which makes it difficult to implement them in cities with limited land. On the other hand, these devices cannot degrade difficult-to-degrade micropollutants (such as propranolol and atenolol) in roof runoff, nor can they completely cover the treatment of major pollutants such as SS, COD, ammonia nitrogen, and total phosphorus in roof runoff. In particular, the COD index has not been properly handled, which is often the main pollutant that causes water bodies to deteriorate into black and smelly water bodies. Summary of the invention

[0005] The technical problem to be solved by the present invention is: In order to solve the above technical problem, the present invention provides a rainwater pipe for treating roof runoff pollution and a method for treating roof runoff pollution.

[0006] The technical solution adopted by the present invention is: a rainwater pipe for treating roof runoff pollution, characterized in that: it has a pipe body, at least one degradation module is arranged in the pipe body along the length direction of the pipe body, an overflow pipe is connected to the pipe body, and the two ends of the overflow pipe are respectively connected to the two end positions of the degradation module on the pipe body. In this way, at the beginning of rainfall, the initial rainwater on the roof flows into the pipe body, and the degradation module can process the initial rainwater. When the rainwater flow rate is relatively large in the middle and late stages, the degradation module slows down the water flow in the pipe body, and the water flow in the pipe body can pass through the overflow pipe to avoid blockage in the pipe body.

[0007] The degradation module is a degradation module, and the degradation module has a storage tank, in which a degradation agent is stored, and a first baffle that can be opened and closed is installed on the inner wall of the tube body. The storage tank is connected to the upstream end of the first baffle in the tube body through a delivery pipe, and a valve is installed on the delivery pipe. The first baffle and the valve are both communicatively connected to the controller, and the controller can control the opening and closing of the valve and the opening and closing of the first baffle.

[0008] The degradation module has an ultraviolet lamp and a first liquid level sensor arranged at the upstream end of the first baffle in the pipe body. The ultraviolet lamp and the first liquid level sensor are both communicatively connected to the controller. When the rainwater level at the upstream end of the first baffle in the pipe body reaches the position of the first liquid level sensor, the first liquid level sensor sends a signal to the controller and the controller controls the operation of the ultraviolet lamp, and the ultraviolet lamp processes the rainwater at the upstream end of the first baffle in the pipe body.

[0009] A second liquid level sensor is arranged at the upstream end of the first liquid level sensor in the pipe body. The second liquid level sensor is communicatively connected to the controller. When the rainwater level at the upstream end of the first baffle in the pipe body reaches the position of the second liquid level sensor, the second liquid level sensor sends a signal to the controller and the controller controls the first baffle to open.

[0010] The first baffle comprises a first plate body and a second plate body, and the first plate body and the second plate body cooperate to block the tube body, the first plate body is fixedly mounted on the inner wall of the tube body, a telescopic cylinder is mounted on the inner wall of the tube body, the telescopic cylinder is communicatively connected with the controller, the second plate body is mounted on the end of the telescopic cylinder, and the controller can control the operation of the telescopic cylinder and drive the second plate body to move along the length direction of the tube body.

[0011] The degradation module is a filtering module, which has a second baffle installed in the pipe body, the second baffle is formed with a through hole, and a fine sand layer, a medium coarse sand layer, a coarse sand layer, a steelmaking slag layer, and a zeolite layer are sequentially arranged at the upstream end of the second baffle along the water flow direction in the pipe body.

[0012] A third liquid level sensor is arranged in the pipe body at the upstream side of the filter module, and the third liquid level sensor is communicatively connected with the controller.

[0013] A cleaning port is provided on the side wall of the tube body at the upstream end of the filter module, and a cover plate is installed on the side wall of the tube body at a position corresponding to the cleaning port.

[0014] The overflow pipe is connected with a vent pipe, and a vent cap is installed at the end of the vent pipe.

[0015] A method for treating roof runoff pollution, using the above-mentioned rainwater pipe for treating roof runoff pollution:

[0016] In the initial state, the first baffle is in a closed state, and a certain amount of degradation agent is accumulated on the upstream side of the first baffle;

[0017] During rainfall, initial rainwater enters the pipe body and accumulates at the upstream end of the first baffle. The initial rainwater is mixed with the degradation agent, and the degradation agent processes the initial rainwater. When the rainwater level at the upstream end of the first baffle reaches the position of the first liquid level sensor, the first liquid level sensor sends a signal to the controller, and the controller controls the operation of the ultraviolet lamp and processes the rainwater in the upstream end of the first baffle.

[0018] When the rainwater level at the upstream end of the first baffle reaches the position corresponding to the second liquid level sensor, the second liquid level sensor sends a signal to the controller and the controller controls the telescopic cylinder to operate, so that the rainwater passes through the first baffle and flows to the outlet, and the controller controls the ultraviolet lamp to turn off;

[0019] When the initial rainwater flows to the outlet, it passes through the filtration module, and impurities in the rainwater are filtered out when the rainwater passes through the fine sand layer, medium coarse sand layer, coarse sand layer, steelmaking slag layer, and zeolite layer in sequence;

[0020] When the rainwater flow in the pipe body is large in the middle and late stages, the excess rainwater flows to the pollution degradation module and the filtration module through the overflow pipe;

[0021] When the rainfall stops, the water level on the upstream side of the filter module continues to decrease until it reaches the position of the third liquid level sensor. At this time, the third liquid level sensor sends a signal to the controller, and the controller controls the telescopic cylinder to reset, and the controller controls the valve to operate regularly and replenish the degradation agent.

[0022] Repeat the above steps the next time it rains. The beneficial effects of the present invention are as follows: the present invention sequentially arranges a degradation module and a filtration module in the pipe body of the rainwater pipe along the direction of rainwater flow, so that when it rains, the initial rainwater is sequentially processed by the degradation module and filtered by the filtration module in the rainwater pipe, which plays a good treatment role on the initial rainwater. At the same time, the rainwater can also play a good energy dissipation role when flowing through the degradation module and the filtration module, which can effectively extend the service life of the rainwater riser and increase the safety factor of the pipeline; the present invention arranges an openable and closable first baffle in the pipe body, the first baffle is in a closed state in the normal state, and is connected to the storage tank through a delivery pipe on the upstream side of the first baffle, and a valve connected to the controller in communication is arranged on the delivery pipe, so that the controller can control the valve to open at a fixed time and quantitatively transport the degradation agent in the storage tank to the upstream side of the first baffle in the pipe body. After the initial rainwater enters the pipe body, it mixes with the degradation agent on the upstream side of the first baffle, thereby treating the initial rainwater; the present invention arranges an ultraviolet light connected to the controller in communication on the upstream side of the first baffle The lamp and the first liquid level sensor are convenient for the initial rainwater to enter the pipe body and reach the first liquid level sensor under the blocking action of the first baffle. The controller will control the operation of the ultraviolet lamp and make the ultraviolet lamp cooperate with the degradation agent to process the initial rainwater; in this embodiment, a second liquid level sensor connected to the controller is arranged on the upstream side of the first liquid level sensor in the pipe body, so that when the rainwater level on the upstream side of the first baffle reaches the second liquid level sensor, the controller controls the first baffle to open, so that the middle and late rainwater can flow to the outlet side through the first baffle; the present invention arranges a second baffle with a through hole on the inner wall of the pipe body and arranges a fine sand layer, a medium-coarse sand layer, a coarse sand layer, a steelmaking slag layer, and a zeolite layer in sequence on the upstream side of the second baffle, so that the rainwater will be filtered through the filter module when flowing out of the pipe body to filter out impurities; the present invention arranges a first overflow pipe and a second overflow pipe at the degradation module and the filter module respectively, so that when the rainwater flow in the pipe body is large, the excess rainwater can be discharged from the pipe body through the first overflow pipe and the second overflow pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the degradation module in the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the filtering module in the present invention.

[0026] Figure 4 : Ammonia nitrogen removal effect diagram of each component in the filtration module of the present invention, wherein (a) and (b) are ammonia nitrogen removal effect diagrams of each component when the initial ammonia nitrogen concentration is 5 mg / L and 2 mg / L, respectively.

[0027] Figure 5: The total phosphorus removal effect diagram of each component in the filtration module of the present invention, wherein (a) and (b) are the total phosphorus removal effect diagrams of each component when the initial total phosphorus concentration is 5 mg / L and 0.2 mg / L, respectively.

[0028] Figure 6 : The effect diagram of the degradation module of the present invention in degrading propranolol and atenolol.

[0029] In the figure: 1. pipe body; 1-1. water inlet; 1-2. water outlet; 1-3. inspection port; 1-4. cleaning port; 2. degradation module; 2-1. storage tank; 2-2. delivery pipe; 2-3. valve; 2-4. first baffle; 2-5. first liquid level sensor; 2-6. second liquid level sensor; 2-7. ultraviolet lamp; 2-8. first plate body; 2-9. second plate body; 2-10. telescopic cylinder; 3. filter module; 3-1. second baffle; 3-2. zeolite layer; 3-3. steelmaking slag layer; 3-4. coarse sand layer; 3-5. medium coarse sand layer; 3-6. fine sand layer; 3-7. third liquid level sensor; 4. overflow pipe; 4-1. first overflow pipe; 4-2. second overflow pipe; 5. vent pipe; 6. vent cap. DETAILED DESCRIPTION

[0030] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0031] This embodiment is a rainwater pipe for treating roof runoff pollution. It has a pipe body 1, a water inlet 1-1 of the pipe body 1 is arranged on the roof, and a water outlet 1-2 of the pipe body 1 is arranged on the ground, so that rainwater on the roof flows into the pipe body 1 through the water inlet 1-1 and is discharged to the ground through the water outlet 1-2 of the pipe body 1.

[0032] In this embodiment, a degradation module 2 and a filtering module 3 are sequentially arranged in the pipe body 1 along the flow direction of rainwater, and the degradation module 2 is located at an upstream position of the filtering module 3 .

[0033] In this embodiment, the pollution treatment component has a storage tank 2-1, in which a degradation agent is stored, and a first baffle 2-4 is installed on the inner wall of the tube body 1 so as to be opened and closed. The storage tank 2-1 is connected to the upstream end of the first baffle 2-4 in the tube body 1 through a delivery pipe 2-2, and a valve 2-3 is installed on the delivery pipe 2-2. The first baffle 2-4 and the valve 2-3 are both connected to the controller for communication, and the controller can control the opening and closing of the valve 2-3 and the opening and closing of the first baffle 2-4. The first baffle 2-4 is in a closed state in a normal state. The controller controls the valve 2-3 to open at a fixed time, and quantitatively replenishes the degradation agent to the upstream side of the first baffle 2-4 in the tube body 1, so that the initial rainwater can be mixed with the degradation agent on the upstream side of the first baffle 2-4 after entering the tube body 1, thereby treating the initial rainwater.

[0034] In this embodiment, a first liquid level sensor 2-5 and an ultraviolet lamp 2-7 which are communicatively connected to the controller are arranged on the inner wall of the pipe body 1 on the upstream side of the first baffle 2-4, so that when rainwater from the roof flows into the pipe body 1 and the water level on the upstream side of the first baffle 2-4 in the pipe body 1 rises to the position of the first liquid level sensor 2-5, the first liquid level sensor 2-5 sends a signal to the controller and the controller controls the operation of the ultraviolet lamp 2-7, and the ultraviolet lamp 2-7 cooperates with the degradation agent to process the initial rainwater.

[0035] In this embodiment, the degradation agent used is peracetic acid. The main product of peracetic acid after the reaction is acetic acid, which can be efficiently utilized by microorganisms. When acetic acid is discharged into urban water bodies with rainwater, it can effectively promote the cell growth of natural planktonic bacteria and microorganisms such as Chlorella, and accelerate the ecological restoration process of water bodies. In addition, the UV / peracetic acid system is also a green and pollution-free disinfection and sterilization method, which kills toxic pathogens in rainwater without leaving any residue in the environment. The UV / peracetic acid system has a good degradation effect on common difficult-to-degrade organic substances such as propranolol and atenolol. The degradation effect diagram is as follows: Figure 6 The specific experimental process of UV / peracetic acid system degradation of propranolol and atenolol is as follows: 5 μM propranolol and 10 μM atenolol are dissolved in the UV / peracetic acid system, wherein the average light intensity of UV lamp 2-7 is 1.57×10-3 μEs-1 cm-2, the concentration of peracetic acid is 200 μM, the temperature is T=20°C, and the pH is 7.0. The propranolol group is sampled every 3 minutes to determine its concentration, and the atenolol group is sampled every 5 minutes in the first 10 minutes, every 10 minutes from 10 to 30 minutes, and once at 45 minutes.

[0036] In this embodiment, a second liquid level sensor 2-6 is provided on the inner wall of the pipe body 1 upstream of the first liquid level sensor 2-5 and is communicatively connected to the controller. When the water level on the upstream side of the first baffle 2-4 in the pipe body 1 rises to a position corresponding to the second liquid level sensor 2-6, the second liquid level sensor 2-6 sends a signal to the controller and the controller controls the first baffle 2-4 to open, so that the treated initial rainwater and mid- and late-stage rainwater can pass through the degradation module 2 and flow out of the pipe body 1.

[0037] In this embodiment, the first baffle 2-4 has a first plate body 2-8 and a second plate body 2-9, and the first plate body 2-8 and the second plate body 2-9 cooperate to block the pipe body 1. The first plate body 2-8 is fixedly installed on the inner wall of the pipe body 1, and a telescopic cylinder 2-10 is installed on the inner wall of the pipe body 1. The telescopic cylinder 2-10 is connected to the controller for communication, and the second plate body 2-9 is installed at the end of the telescopic cylinder 2-10. The controller can control the operation of the telescopic cylinder 2-10 and drive the second plate body 2-9 to move along the length direction of the pipe body 1. Among them, the telescopic cylinder 2-10 is arranged at the downstream side of the first baffle 2-4. When the telescopic cylinder 2-10 is retracted, the second baffle 3-1 moves to cooperate with the first baffle 2-4 to block the pipe body 1. When the telescopic cylinder 2-10 is extended, the second baffle 3-1 moves upstream, and rainwater can pass through the gap between the first baffle 2-4 and the second baffle 3-1.

[0038] In this embodiment, the filter module 3 has a second baffle 3-1 installed in the pipe body 1, and a through hole is formed on the second baffle 3-1. At the upstream end of the second baffle 3-1, a fine sand layer 3-6, a medium coarse sand layer 3-5, a coarse sand layer 3-4, a steelmaking slag layer 3-3, and a zeolite layer 3-2 are sequentially arranged along the water flow direction in the pipe body 1. In this way, when the rainwater in the pipe body 1 flows through the filter module 3, it will pass through the fine sand layer 3-6, the medium coarse sand layer 3-5, the coarse sand layer 3-4, the steelmaking slag layer 3-3, the zeolite layer 3-2 and the second baffle 3-1 in sequence, which has a good filtering effect on the rainwater.

[0039] The zeolite layer 3-2 has a good treatment effect on removing ammonia nitrogen from rainwater. The treatment effect diagram is as follows: Figure 4 As shown in the figure, the specific experimental process for treating ammonia nitrogen is as follows: 1g of each of the four fillers (steelmaking slag, ironmaking slag, coppermaking slag, and zeolite) is added to 200mL of an ammonia nitrogen solution with an initial concentration of 5mg / L for experiment, and the reaction is carried out in a magnetic stirring reactor at pH = 7 and 25°C for 2h. After the reaction starts, samples are taken every 20min to measure the change in ammonia nitrogen concentration.

[0040] The main components of the steelmaking slag in the steelmaking slag layer 3-3 are CaO, SiO2, Fe2O3, FeO, and Al2O3. The steelmaking slag layer 3-3 has a good treatment effect on removing phosphorus from rainwater. The treatment effect diagram is as follows Figure 4As shown in the figure, the specific experimental process for treating ammonia nitrogen is as follows: 1 g of four fillers (steelmaking slag, ironmaking slag, coppermaking slag, zeolite) are respectively added to 200 mL of a phosphorus solution with an initial concentration of 5 mg / L for experiment, and the reaction is carried out in a magnetic stirring reactor at pH = 7 and 25°C for 70 minutes (based on the preliminary experimental results, the removal rate of TP by the filler is relatively fast and is basically completed within 1 hour, so the experimental time is 70 minutes). After the reaction starts, sampling is carried out every 10 minutes for the first 30 minutes, and sampling is carried out every 20 minutes for the next 40 minutes.

[0041] In this embodiment, a cleaning port 1-4 is provided on the side wall of the tube body 1 at the upstream end of the filter module 3, and a cover plate is installed on the side wall of the tube body 1 at a position corresponding to the cleaning port 1-4. In this way, it is convenient for personnel to remove impurities filtered by the filter module 3 through the cleaning port 1-4 after opening the cover plate.

[0042] In this embodiment, an inspection opening 1-3 is provided on the pipe body 1, and an inspection cap is installed on the inspection opening 1-3, so that personnel can inspect the inside of the pipe body 1 through the inspection opening 1-3 after opening the inspection cap.

[0043] In this embodiment, the first overflow pipe 4-1 is connected to the pipe body 1 at a position corresponding to the degradation module 2, and the two ends of the first overflow pipe 4-1 are respectively connected to the upstream position and the downstream position of the degradation module 2; the second overflow pipe 4-2 is connected to the pipe body 1 at a position corresponding to the filtration module 3, and the two ends of the second overflow pipe 4-2 are respectively connected to the upstream position and the downstream position of the filtration module 3. In this way, when the rainwater flow in the pipe body 1 is large, because the degradation module 2 and the filtration module 3 have a certain slow flow effect, the excess flow of rainwater will bypass the degradation module 2 and the filtration module 3 through the first overflow pipe 4-1 and the second overflow pipe 4-2 after flowing into the pipe body 1, thereby realizing the discharge of rainwater.

[0044] In this embodiment, the first overflow pipe 4-1 is connected with a vent pipe 5, and a vent cap 6 is installed at the end of the vent pipe 5. In this way, the inside of the pipe body 1 is connected with the air, so that rainwater can be discharged smoothly.

[0045] In this embodiment, the method for treating roof runoff pollution is:

[0046] In the initial state, the first baffle 2-4 is in a closed state, and a certain amount of degradation agent is accumulated on the upstream side of the first baffle 2-4;

[0047] During rainfall, initial rainwater enters the pipe body 1 and accumulates at the upstream end of the first baffle 2-4. The initial rainwater is mixed with the degradation agent, and the degradation agent processes the initial rainwater. When the rainwater level at the upstream end of the first baffle 2-4 reaches the position of the first liquid level sensor 2-5, the first liquid level sensor 2-5 sends a signal to the controller, and the controller controls the operation of the ultraviolet lamp 2-7 and processes the rainwater in the upstream end of the first baffle 2-4.

[0048] When the rainwater level at the upstream end of the first baffle 2-4 reaches the position corresponding to the second liquid level sensor 2-6, the second liquid level sensor 2-6 sends a signal to the controller and the controller controls the telescopic cylinder 2-10 to operate, so that the rainwater passes through the first baffle 2-4 and flows to the outlet, and the controller controls the ultraviolet lamp 2-7 to turn off;

[0049] When the initial rainwater flows to the outlet, it passes through the filter module 3, and the impurities in the rainwater are filtered out when the rainwater passes through the fine sand layer 3-6, the medium coarse sand layer 3-5, the coarse sand layer 3-4, the steelmaking slag layer 3-3, and the zeolite layer 3-2 in sequence;

[0050] When the rainfall stops, the water level on the upstream side of the filter module 3 continues to decrease until it reaches the position of the third liquid level sensor 3-7. At this time, the third liquid level sensor 3-7 sends a signal to the controller, and the controller controls the telescopic cylinder 2-10 to reset, and the controller controls the valve 2-3 to operate regularly and replenish the degradation agent;

[0051] Repeat the above steps when it rains next time. In this way, the rainwater pipe automatically replenishes the degradation agent according to the rainfall situation and processes the initial rainwater.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rainwater pipe for treating roof runoff pollution, characterized in that: The invention comprises a pipe body (1), wherein at least one pollution treatment module is arranged inside the pipe body (1) along the length direction of the pipe body (1), an overflow pipe (4) is connected to the pipe body (1), and two ends of the overflow pipe (4) are respectively connected to the two end positions of the pollution treatment module on the pipe body (1).

2. A rainwater pipe for treating roof runoff pollution according to claim 1, characterized in that: The pollution treatment module is a degradation module (2), and the degradation module (2) comprises a storage tank (2-1), wherein the storage tank (2-1) stores a degradation agent, and a first baffle (2-4) which can be opened and closed is installed on the inner wall of the tube body (1), and the storage tank (2-1) is connected to the upstream end of the first baffle (2-4) in the tube body (1) through a delivery pipe (2-2), and a valve (2-3) is installed on the delivery pipe (2-2), and the first baffle (2-4) and the valve (2-3) are both communicatively connected with a controller, and the controller can control the opening and closing of the valve (2-3) and the opening and closing of the first baffle (2-4).

3. A rainwater pipe for treating roof runoff pollution according to claim 2, characterized in that: The degradation module (2) comprises an ultraviolet lamp (2-7) and a first liquid level sensor (2-5) which are arranged at the upstream end of the first baffle (2-4) in the pipe body (1); the ultraviolet lamp (2-7) and the first liquid level sensor (2-5) are both communicatively connected to a controller; when the rainwater level at the upstream end of the first baffle (2-4) in the pipe body (1) reaches the position of the first liquid level sensor (2-5), the first liquid level sensor (2-5) sends a signal to the controller, and the controller controls the operation of the ultraviolet lamp (2-7), and the ultraviolet lamp (2-7) processes the rainwater at the upstream end of the first baffle (2-4) in the pipe body (1).

4. A rainwater pipe for treating roof runoff pollution according to claim 3, characterized in that: A second liquid level sensor (2-6) is arranged at the upstream end of the first liquid level sensor (2-5) in the pipe body (1), and the second liquid level sensor (2-6) is communicatively connected with a controller. When the rainwater level at the upstream end of the first baffle (2-4) in the pipe body (1) reaches the position of the second liquid level sensor (2-6), the second liquid level sensor (2-6) sends a signal to the controller, and the controller controls the first baffle (2-4) to open.

5. A rainwater pipe for treating roof runoff pollution according to claim 2, characterized in that: The first baffle (2-4) comprises a first plate body (2-8) and a second plate body (2-9), the first plate body (2-8) and the second plate body (2-9) cooperate to block the tube body (1), the first plate body (2-8) is fixedly mounted on the inner wall of the tube body (1), a telescopic cylinder (2-10) is mounted on the inner wall of the tube body (1), the telescopic cylinder (2-10) is communicatively connected with a controller, the second plate body (2-9) is mounted at the end of the telescopic cylinder (2-10), and the controller can control the operation of the telescopic cylinder (2-10) and drive the second plate body (2-9) to move along the length direction of the tube body (1).

6. A rainwater pipe for treating roof runoff pollution according to claim 1, characterized in that: The pollution treatment module is a filter module (3), the filter module (3) having a second baffle (3-1) installed in the pipe body (1), the second baffle (3-1) being provided with a through hole, and a fine sand layer (3-6), a medium coarse sand layer (3-5), a coarse sand layer (3-4), a steelmaking slag layer (3-3), and a zeolite layer (3-2) being sequentially arranged at the upstream end of the second baffle (3-1) along the water flow direction in the pipe body (1).

7. A rainwater pipe for treating roof runoff pollution according to claim 6, characterized in that: A third liquid level sensor (3-7) is arranged on the upstream side of the pollution filtering module (3) in the pipe body (1), and the third liquid level sensor (3-7) is communicatively connected with the controller.

8. A rainwater pipe for treating roof runoff pollution according to claim 6, characterized in that: A cleaning port (1-4) is provided on the side wall of the tube body (1) at the upstream end of the pollution filtering module (3), and a cover plate is installed on the side wall of the tube body (1) at a position corresponding to the cleaning port (1-4).

9. A rainwater pipe for treating roof runoff pollution according to claim 1, characterized in that: The overflow pipe (4) is connected to a vent pipe (5), and a vent cap (6) is installed at the end of the vent pipe (5).

10. A method for treating roof runoff pollution, using a rainwater pipe for treating roof runoff pollution as described in any one of claims 1 to 9, characterized in that: In the initial state, the first baffle (2-4) is in a closed state, and a certain amount of degradation agent is accumulated on the upstream side of the first baffle (2-4); During rainfall, initial rainwater enters the pipe body (1) and accumulates at the upstream end of the first baffle (2-4), the initial rainwater is mixed with a degradation agent, and the degradation agent processes the initial rainwater. When the rainwater level at the upstream end of the first baffle (2-4) reaches the position of the first liquid level sensor (2-5), the first liquid level sensor (2-5) sends a signal to the controller, and the controller controls the operation of the ultraviolet lamp (2-7) and processes the rainwater in the upstream end of the first baffle (2-4); When the rainwater level at the upstream end of the first baffle (2-4) reaches a position corresponding to the second liquid level sensor (2-6), the second liquid level sensor (2-6) sends a signal to the controller and the controller controls the telescopic cylinder (2-10) to operate, so that the rainwater passes through the first baffle (2-4) and flows to the outlet, and the controller controls the ultraviolet lamp (2-7) to turn off; When the initial rainwater flows toward the outlet, it passes through the filtering module (3), and impurities in the rainwater are filtered out when the rainwater passes through the fine sand layer (3-6), the medium coarse sand layer (3-5), the coarse sand layer (3-4), the steelmaking slag layer (3-3), and the zeolite layer (3-2) in sequence; When the rainwater flow rate in the pipe body (1) is relatively large in the middle and later stages, the excess rainwater flows through the overflow pipe (4) to the pollution degradation module (2) and the filtration module (3); When the rainfall stops, the water level on the upstream side of the pollution filtering module (3) continues to decrease until it reaches the position of the third liquid level sensor (3-7). At this time, the third liquid level sensor (3-7) sends a signal to the controller, and the controller controls the telescopic cylinder (2-10) to reset, and the controller controls the valve (2-3) to operate regularly and replenish the degradation agent; Repeat the above steps the next time it rains.

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