A simulation device and experimental method for carbon-pollution conversion of mixed sewage in a rainwater system

Abstract

The present invention belongs to the field of anchor rod technology, specifically a device and experimental method for simulating carbon-pollution conversion of mixed sewage in a rainwater system, comprising an outer box, an inner tube arranged in the outer box, and a connecting mechanism arranged between the outer box and the inner tube; a detachable left tube cover is arranged on one side of the inner tube, and a right tube cover is fixedly installed on the other side of the inner tube, and a pair of first water inlet holes are arranged on the right tube cover; compared with traditional drainage pipe simulation devices, the present invention occupies less space, is easy to carry, and has various functions, with three experimental modes, namely: an experiment simulating continuous inflow of mixed sewage into a rainwater pipe on sunny days, an experiment simulating the carbon-pollution conversion law in the process of sediment and sewage in the rainwater pipe being washed and discharged into a river by rainwater on rainy days, and an experiment simulating the carbon-pollution conversion law in an urban river under the influence of impact pollution on rainy days.

Description

Technical Field

[0001] The present invention belongs to the technical field of anchor rods, and in particular relates to a simulation device and an experimental method for carbon-pollution conversion of mixed sewage in a rainwater system. Background Art

[0002] Currently, research on stormwater pipes and flushing processes within stormwater systems is limited, primarily focusing on the occurrence, migration, and transformation patterns of conventional pollutants, as well as on the transformation patterns of pollutants across interfaces. For example, one study measured the levels of carbon, nitrogen, and phosphorus pollutants in pipe sediments, street dust, and overlying water in typical functional areas of Suzhou, as well as the heavy metal content of pipe sediments and street dust. This study evaluated the pollution levels of pipe sediments and street dust and analyzed the migration characteristics between sediments and street dust of varying particle sizes. The study also examined the interaction between pollutants in water and sediments after different suspended solids concentrations and water flow rates enter pipes during the rainy season.

[0003] A Chinese patent application CN113466400B discloses an integrated device for pipeline sediment simulation cultivation and scouring test and its experimental method. The key points of its technical solution are: the device includes an outer tube and an inner tube that is detachably fixed to the top of the outer tube, wherein: the left and right sides of the inner tube are respectively provided with detachable left and right tube covers, sediment baffles are fixed on the left and right sides of the inner tube, and a water inlet hole is provided on the right tube cover, which can be used to connect to the water inlet pipe, and the top of the outer tube is provided with a water inlet and test port.

[0004] However, the above technology often has the following defects: the above device is divided into two parts, an inner tube and an outer tube, which can realize the cultivation of pipeline sediments and simulation of sediment flushing processes, but the inner tube of the device uses an internal flange, and the air tightness of the device cannot be guaranteed. Using the inner tube alone cannot realize continuous cultivation of sediments, nor can it simulate the carbon emission process in the rainwater pipe, and cannot realize the simultaneous collection of air, water and sediment samples. For this reason, the present invention provides a mixed sewage carbon pollution conversion simulation device and experimental method in a rainwater system. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the device for simulating the conversion of mixed sewage into carbon-polluted materials in a rainwater system described in the present invention comprises an outer box, an inner tube is arranged in the outer box, and a connecting mechanism is arranged between the outer box and the inner tube for connection; a detachable left tube cover is arranged on one side of the inner tube, and a right tube cover is fixedly installed on the other side of the inner tube, a pair of first water inlet holes are arranged on the right tube cover, and the pair of the first water inlet holes are respectively used to connect the rainwater and sewage inlet pipes; a group of water outlet holes and a first sampling tube are arranged on the left tube cover, and the water outlet holes are connected to the first water outlet pipe (not shown in the figure), and the first water outlet Valves are provided on the tube and the first sampling tube, a first air measuring port is provided on the top of the inner tube, a pair of second air measuring ports are provided on the top of the outer box, a detachable left end cover is provided on one side of the outer box, a right end cover is fixedly installed on one side of the outer box, a circulation mechanism for circulating water is provided on the outer box, a second sampling tube is connected to the left end cover, a valve is provided on the second sampling tube, a valve is provided on the second water outlet pipe, a group of second water inlet holes sealed and plugged with the first water inlet hole are provided at the center of the right end cover, the second circulation pipe can be connected to a water pump, the inner tube is assembled in the outer box, and the right tube cover and the right end cover are sealed and plugged.

[0007] Preferably, the connecting mechanism includes an external flange arranged on the left tube cover and the left end cover, a bracket is provided in the outer box, and the inner tube and the outer box are fixedly connected by direct adhesion of the right end cover and the right tube cover and the bracket at the bottom of the inner tube.

[0008] Preferably, a left sediment baffle is provided on one side of the inner tube, and a fixing mechanism for fixing the left sediment baffle is provided in the inner tube. A right sediment baffle is fixedly connected to the other side of the inner tube, and the right sediment baffle and the left sediment baffle are fixed to the inner tube 1 to 2 cm away from the inner tube orifice. The left sediment baffle is arched, the arc side of the arch is the major arc, and the diameter is the same as the inner diameter of the inner tube. The right sediment baffle is circular, and the diameter is the same as the inner diameter of the inner tube. The right sediment baffle is drilled with square holes away from the sediment part as a water distribution wall.

[0009] Preferably, the fixing mechanism includes a semicircular ring provided with an inner tube, the semicircular ring is fixedly connected to a positioning post on one side close to the left sediment baffle, a positioning hole is provided on the side of the left sediment baffle corresponding to the positioning post, a connecting groove is provided on the outer wall of the positioning post, a blocking block is slidably connected in the connecting groove, the top surface of the blocking block is inclined, a first spring is fixedly connected between the bottom surface of the blocking block and the inner wall of the connecting groove, the inner wall of the positioning hole is provided with a blocking groove that is engaged with the blocking block, the left sediment baffle is slidably connected to a fixing rod extending into the positioning hole on the side away from the semicircular ring, the positioning post is provided with a circular groove on the side close to the fixing rod, a first magnetic block that is magnetically attracted to the blocking block is slidably connected in the circular groove, and a connecting rod is fixedly connected between the fixing rod and the first magnetic block.

[0010] Preferably, a hollow arc plate is fixedly connected to one side of the left sediment baffle close to the semicircular ring, the bottom surface of the arc plate is fitted with the inner wall of the inner tube, the arc plate is opened on one side close to the semicircular ring, the top surface of the arc plate is slidably connected to a sealing plate that seals the open end, a positioning assembly for positioning the sealing plate is provided on the arc plate, and the semicircular ring and the inner tube are fixedly installed by screws.

[0011] Preferably, the positioning assembly includes a round rod slidably connected to the arc plate, a round hole corresponding to the round rod is opened on the sealing plate, a disc is fixedly connected to the round rod, a third spring is fixedly connected between the disc and the arc plate, and the right sediment baffle is equivalent to the disc being fixedly connected to the second magnetic block that is magnetically attracted to the round rod.

[0012] A simulated experimental method for carbon-pollution conversion of mixed sewage in a rainwater system, using the above-mentioned simulated device for carbon-pollution conversion of mixed sewage in a rainwater system, is characterized in that the method comprises the following steps:

[0013] S1: By keeping the inner pipe and outer box open, an experiment is conducted to simulate the carbon-pollution conversion law of mixed sewage in the stormwater pipe during the non-rainy season. The stabilized stormwater pipe sediment is filled into the inner pipe. The sediment height shall not exceed 50% of the height of the left sediment baffle.

[0014] S2: After the sediment is filled, install the left pipe cover on the left side of the inner pipe, connect the first water inlet to the sewage storage bucket through the water pump, select the sewage outlet hole corresponding to the water level in the rainwater pipe, and connect it to the wastewater bucket through the hose. The remaining outlet holes can be kept closed by the water stop clamps on the connected hoses;

[0015] S3: Close the inner tube and introduce nitrogen from the first water inlet hole that is not connected to the water pump. The oxygen in the inner tube is discharged from the water outlet hole and the second gas measuring port on the top. After the inner tube is filled with nitrogen, the water inlet and outlet holes and the first gas measuring port are blocked, so that the inner tube is in a closed state.

[0016] S4: Place the device in a constant temperature incubator, turn on the water pump, and allow the sewage to flow continuously from the first water inlet into the inner tube. After staying in the inner tube for a certain period of time, it is discharged from the water outlet into the wastewater bucket. The device is operated continuously at 25°C.

[0017] S5: Collect water and gas samples from the first sampling tube and the second gas measuring port at a certain frequency, test the pollutant content in the water samples, the change in the molecular weight of organic matter, and the concentration of greenhouse gases in the gas, and explore the carbon pollution transformation pattern of mixed sewage in the rainwater pipe on sunny days;

[0018] S6: Continue to use the inner pipe and outer box together to simulate the experiment on the carbon pollution conversion law of mixed sewage in the drainage system during the rainy season. After the experiment is completed, only use the outer box to simulate the carbon pollution conversion law after the impact pollution is discharged into the urban water body during rainy days.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. Compared with traditional drainage pipe simulation devices, the present invention takes up less space, is easy to carry, and has multiple functions. It has three experimental modes: an experiment simulating the continuous inflow of mixed sewage into a rainwater pipe on a sunny day, an experiment simulating the carbon pollution conversion law when sediment and sewage in the rainwater pipe are washed into the river by rainwater on a rainy day, and an experiment simulating the carbon pollution conversion law in an urban river under the influence of impact pollution on rainy days.

[0021] 2. The simulation device of the present invention can create a closed condition to conduct cultivation experiments and fermentation gas production experiments in an anaerobic environment, and is equipped with a pressure gauge and a safety airbag. At the same time, the inner tube and the outer box can be used separately or in combination. It has diverse functions and can also realize the simultaneous collection of three samples of gas, water, and sediment without destroying the airtightness of the device. This device can not only simulate the carbon emission process of the drainage system, but also can be used to simulate the migration and transformation mechanism of various conventional pollutants and new pollutants in the drainage pipe, as well as the transformation mechanism at the sediment-water interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the connection between the inner tube and the outer box in the present invention;

[0024] Figure 2 is a longitudinal sectional view of the inner tube of the present invention;

[0025] Figure 3 It is a longitudinal sectional view of the outer box of the present invention;

[0026] Figure 4 It is a right side view of the outer box of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the left pipe cover in the present invention;

[0028] Figure 6 It is a structural schematic diagram of the right pipe cover in the present invention;

[0029] Figure 7 It is a structural schematic diagram of the left end cover in the present invention;

[0030] Figure 8 It is a structural schematic diagram of the right end cover in the present invention;

[0031] Figure 9 Schematic diagram of the structure of the right sediment baffle in the present invention;

[0032] Figure 10 It is a structural schematic diagram of the left sediment baffle in the present invention;

[0033] Figure 11 This is a schematic diagram of the structure after the left sediment baffle in the inner tube of the present invention is fixed;

[0034] Figure 12 It is a structural schematic diagram of the fixing mechanism of the present invention;

[0035] Figure 13 This is a schematic diagram of the structure after the sealing plate is opened on the curved plate in the present invention;

[0036] Figure 14 In the present invention Figure 13 Enlarged view of point C;

[0037] Figure 15 It is a flow chart of the method in the present invention.

[0038] In the figure: 1. inner tube; 2. left tube cover; 3. right tube cover; 4. left sediment baffle; 5. water outlet; 6. first sampling tube; 7. first gas measuring port; 8. left end cover; 9. right end cover; 10. first circulation tube; 11. second sampling tube; 12. second water outlet tube; 13. bracket; 14. second circulation tube; 15. first water inlet; 16. second gas measuring port; 17. outer box; 18. barometer; 19. second water inlet; 20. right sediment baffle; 21. semicircular ring; 22. positioning column; 23. connecting groove; 24. clamping block; 25. circular groove; 26. clamping groove; 27. connecting plate; 28. first magnetic block; 29. ​​positioning hole; 30. fixing rod; 31. second magnetic block; 32. arc plate; 33. sealing plate; 34. round rod; 35. disc. DETAILED DESCRIPTION

[0039] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0040] Example 1: Figures 1 to 10 As shown, a simulated device for carbon-polluted conversion of mixed sewage in a rainwater system according to an embodiment of the present invention includes an outer box 17, an inner tube 1 is provided in the outer box 17, and a connecting mechanism is provided between the outer box 17 and the inner tube 1 for connection;

[0041] Plate 20, and the right sediment baffle 20 and the left sediment baffle 4 are fixed to the inner tube 1 at a distance of 1 to 2 cm from the orifice of the inner tube 1, the left sediment baffle 4 is arched, the arc side of the arch is the major arc, and the diameter is the same as the inner diameter of the inner tube 1, the right sediment baffle 20 is circular, and the diameter is the same as the inner diameter of the inner tube 1, and the right sediment baffle 20 is away from the sediment part and a square hole is punched as a water distribution wall; in order to prevent the sediment in the inner tube 1 from falling, the right sediment baffle 20 and the left sediment baffle 4 are set on the inner tube 1 at a distance of 1 to 2 cm from the orifice of the inner tube 1, and the right sediment baffle 20 is away from the sediment part and a square hole is punched as a water distribution wall, which can evenly distribute the flushing water in the inner tube 1 to prevent the inflow of water from being too large and having too much impact on the sediment.

[0042] The circulation mechanism includes a first circulation pipe 10 provided on the left end cover 8, and a second circulation pipe 14 is connected to the bottom of the right end cover 9. The first circulation pipe 10 and the second circulation pipe 14 are connected to the water inlet and outlet ends of the water pump through a hose.

[0043] By keeping the inner tube 1 and the outer box 17 open, an experiment is conducted to simulate the carbon pollution conversion law of mixed sewage in the rainwater pipe during the non-rainy season. The stabilized rainwater pipe sediment is filled into the inner tube 1. The sediment height shall not be higher than 50% of the height of the left sediment baffle 4. After the sediment is filled, the left pipe cover 2 is assembled on the left side of the inner tube 1, and the first water inlet 15 is connected to the sewage storage barrel through a water pump. The sewage outlet 5 corresponding to the water level in the rainwater pipe is selected and connected to the wastewater barrel through a hose. The inner tube 1 is closed, and nitrogen is introduced from the first water inlet 15 that is not connected to the water pump. The oxygen in the inner tube 1 is discharged from the outlet 5 and the second gas measuring port 16 on the top. After the inner tube 1 is filled with nitrogen, the water inlet and outlet 5 and the first gas measuring port 7 are blocked, so that the inner tube 1 is in a closed state.

[0044] Place the device in a constant temperature incubator (protected from light), turn on the water pump, and the sewage flows into the inner tube 1 from the first water inlet 15 in the form of a continuous flow. After staying in the inner tube 1 for a certain period of time, it is discharged into the waste water bucket from the water outlet 5. The device is operated continuously at 25°C.

[0045] Water samples and gas samples are collected from the first sampling tube 6 and the second gas measuring port 16 at the top at a certain frequency to detect the pollutant content in the water sample, the change in the molecular weight of organic matter, and the concentration of greenhouse gases in the gas, and to explore the carbon pollution transformation law of mixed sewage in the rainwater pipe on sunny days.

[0046] By combining the inner tube 1 and the outer box 17 to simulate the carbon-pollution conversion law of mixed sewage in the drainage system during the rainy season, the stabilized rainwater pipe sediment is filled into the inner tube 1, and the sediment height shall not be higher than the height of the left sediment baffle 4; after the sediment is filled, the left pipe cover 2 is assembled on the left side of the inner tube 1, and the first water inlet 15 is connected to the sewage storage barrel through a water pump. The sewage outlet 5 corresponding to the water level in the rainwater pipe is selected and connected to the wastewater barrel through a hose, and the inner tube 1 is closed. Nitrogen is introduced from the first water inlet 15 that is not connected to the water pump, and the oxygen inside the inner tube 1 is discharged from the outlet 5 and the second gas measuring port 16 on the top. After the inner tube 1 is filled with nitrogen, the water inlet and outlet 5 and the first gas measuring port 7 are blocked, so that the inner tube 1 is in a closed state;

[0047] Place the device in a constant-temperature incubator (protected from light) and start the water pump. Sewage will flow continuously from the first water inlet 15 into the inner tube 1. After a certain period of residence in the inner tube 1, it will be discharged from the water outlet 5 into the wastewater bucket, operating continuously at 25°C. Stop the water pump, remove the left pipe cap 2 of the inner tube 1, connect the left end cap 8 to the left side of the outer box 17 via an external flange, and seal the outer box 17. Close the valve of the second water inlet pipe, connect the first water inlet 15 connected to the rainwater inlet pipe to the rainwater storage bucket through the water pump, and open its valve. Open the valve of the second water outlet pipe 12.

[0048] After starting the water pump, the simulation device begins to run. The valve on the sampling tube is opened at regular intervals, and water samples are taken from the second sampling tube 11 to detect the pollutant content and changes in the molecular weight of organic matter in the water samples. At the same time, a pair of second gas measuring ports 16 on the top of the outer box 17 are opened to collect gas samples and detect the greenhouse gas content therein to investigate the carbon pollution transformation law during the washing of mixed sewage by rainwater on rainy days. After the washing experiment is completed, the second outlet pipe 12 at the bottom of the right end cover 9 of the outer box 17 is connected to the water pump to discharge all the flushing water in the device.

[0049] By using only the outer box 17 to simulate the carbon pollution conversion law after the impact pollution is discharged into the urban water body during rainy days, the left end cover 8 is connected to the outer box 17 by means of a connecting flange, and the overflow water from the urban rainwater pipe on rainy days is mixed with the surface water sample in a certain proportion, and all of it is passed into the outer box 17 through the second outlet pipe 12; the valves of the second sampling tube 11 and the second outlet pipe 12 are closed, the first gas measuring port 7 on the top is closed, and the first circulation hole and the second circulation hole are connected to the inlet and outlet ends of the water pump through a hose; after the water pump is turned on, the simulation device starts to run, and the valve on the second sampling tube 11 is opened at regular intervals to take water samples out of it to detect the pollutant content and changes in the molecular weight of organic matter in the water samples. At the same time, the second gas measuring port 16, which is offset from the first gas measuring port 7, is opened to collect gas samples, and the greenhouse gas content therein is detected to investigate the carbon emission law of urban rivers under the influence of the problem of rainwater and sewage mixing.

[0050] Example 2: Figures 11 to 14As shown, in contrast to Example 1, another embodiment of the present invention is as follows: the fixing mechanism includes a semicircular ring 21 provided with an inner tube 1, and a positioning column 22 is fixedly connected to the side of the semicircular ring 21 close to the left sediment baffle 4. A positioning hole 29 is provided on the side of the left sediment baffle 4 corresponding to the positioning column 22, and a connecting groove 23 is provided on the outer wall of the positioning column 22. A card block 24 is slidably connected in the connecting groove 23, and the top surface of the card block 24 is inclined, and the bottom surface of the card block 24 is aligned with the connecting groove 23. A first spring is fixedly connected between the inner walls, and a card groove 26 is provided on the inner wall of the positioning hole 29 to engage with the card block 24. The left sediment baffle 4 is slidably connected to a fixing rod 30 extending into the positioning hole 29 on the side away from the semicircular ring 21. A circular groove 25 is provided on the side of the positioning column 22 close to the fixing rod 30, and a first magnetic block 28 that is magnetically attracted to the card block 24 is slidably connected in the circular groove 25. A connecting rod is fixedly connected between the fixing rod 30 and the first magnetic block 28; in this application, when the sediment in the inner tube 1 needs to be moved When discharging, first remove the left end cover 8 and the left pipe cover 2, then push the fixing rod 30 so that the fixing rod 30 drives the first magnetic block 28 to move to the bottom of the block 24. At this time, the block 24 will be sucked out of the card slot 26. At this time, the left sediment baffle 4 can be taken out from the inner tube 1, and then the sediment can be manually cleaned from the inner tube 1. After cleaning, use a peristaltic pump connected to the first water inlet 15 to allow flushing water to flush into the inner tube 1 to flush and discharge the remaining sediment, thereby achieving the purpose of cleaning the inner tube 1. The effect of cleaning the inside is achieved by placing the left sediment baffle 4 into the inner tube 1 and allowing the positioning post 22 to enter the positioning hole 29. When the positioning post 22 enters the positioning hole 29, the side wall of the left sediment baffle 4 will push the block 24 to move downward, and then when the connecting groove 23 is aligned with the slot 26, the first spring will push the block 24 to engage with the slot 26, thereby limiting the left sediment baffle 4 in the inner tube 1. Through this connection method, the left sediment baffle 4 can be flexibly removed to facilitate subsequent sediment cleaning.

[0051] The left sediment baffle 4 is fixedly connected to a hollow arc plate 32 on one side close to the semicircular ring 21, and the bottom surface of the arc plate 32 fits the inner wall of the inner tube 1. The arc plate 32 is set with an opening on one side close to the semicircular ring 21, and the top surface of the arc plate 32 is slidably connected with a sealing plate 33 that seals the open end. A positioning component for positioning the sealing plate 33 is provided on the arc plate 32, and the semicircular ring 21 and the inner tube 1 are fixedly installed by screws; when the inner tube 1 is flushed, the sediment will fall to the bottom surface of the inner wall of the inner tube 1. At this time, if there is sediment that cannot be removed, the semicircular ring 21 can be disassembled, and then the sealing plate 33 can be moved so that the sealing plate 33 no longer seals the left sediment. The port of the sediment baffle 4 is sealed, and then the sealing plate 33 is positioned with the help of the positioning component. Then, the left sediment baffle 4 is placed in the inner tube 1. The longer long rod can be installed on the left sediment baffle 4 by screws, and then the left sediment baffle 4 is pushed to move in the inner tube 1. At this time, the arc plate 32 can push the sediment remaining on the inner wall of the inner tube 1 into the arc plate 32. After the collection is completed, the positioning component is no longer limited to the sealing plate 33. At this time, the sealing plate 33 will slide due to gravity to seal the port of the arc plate 32, thereby collecting the sediment in the arc plate 32. Then the left sediment baffle 4 is taken out, and the sediment collected in the arc plate 32 is processed

[0052] The second magnetic block 31 will attract the round rod 34, so that the round rod 34 will be disengaged from the circular hole. At this time, the arc plate 32 will slide due to gravity to seal the port of the arc plate 32.

[0053] like Figure 15 As shown, a simulation experimental method for carbon pollution conversion of mixed sewage in a rainwater system is provided. The method adopts the above-mentioned simulation device for carbon pollution conversion of mixed sewage in a rainwater system, and is characterized in that the method comprises the following steps:

[0054] S1: By keeping the inner pipe 1 and the outer box 17 open, an experiment is simulated to simulate the carbon-pollution conversion law of mixed sewage in the rainwater pipe during the non-rainy season. The stabilized rainwater pipe sediment is filled into the inner pipe 1. The sediment height shall not exceed 50% of the height of the left sediment baffle 4.

[0055] S2: After the sediment is loaded, assemble the left pipe cover 2 on the left side of the inner pipe 1, connect the first water inlet 15 to the sewage storage bucket through a water pump, select the sewage outlet 5 corresponding to the water level in the rainwater pipe, and connect it to the wastewater bucket through a hose. The remaining outlet holes 5 can be kept closed by the water stop clamps on the connected hoses;

[0056] S3: Close the inner tube 1 and introduce nitrogen from the first water inlet 15 that is not connected to the water pump. The oxygen in the inner tube 1 is discharged from the water outlet 5 and the second gas measuring port 16 at the top. After the inner tube 1 is filled with nitrogen, the water inlet and outlet 5 and the first gas measuring port 7 are blocked, so that the inner tube 1 is in a closed state.

[0057] S4: Place the device in a constant temperature incubator, turn on the water pump, and the sewage flows into the inner tube 1 from the first water inlet 15 in a continuous flow. After staying in the inner tube 1 for a certain period of time, it is discharged into the wastewater bucket from the water outlet 5. The device is operated continuously at 25°C.

[0058] S5: Collect water and gas samples from the first sampling tube 6 and the second gas measuring port 16 at a certain frequency, detect the pollutant content in the water sample, the change in the molecular weight of organic matter, and the concentration of greenhouse gases in the gas, and explore the carbon pollution transformation law of mixed sewage in the rainwater pipe on sunny days;

[0059] S6: Continue to use the inner tube 1 and the outer box 17 together to simulate the experiment on the carbon pollution conversion law of mixed sewage in the drainage system during the rainy season. After the experiment is completed, only the outer box 17 is used to simulate the carbon pollution conversion law after the impact pollution is discharged into the urban water body during rainy days.

[0060] Working principle: By keeping the inner pipe 1 and the outer box 17 open, an experiment is conducted to simulate the carbon pollution conversion law of mixed sewage in the rainwater pipe during the non-rainy season, and the stabilized rainwater pipe sediment is filled into the inner pipe 1. The sediment height shall not be higher than 50% of the height of the left sediment baffle 4; after the sediment is filled, the left pipe cover 2 is assembled on the left side of the inner pipe 1, and the first water inlet 15 is connected to the sewage storage barrel through a water pump. The sewage outlet 5 corresponding to the water level in the rainwater pipe is selected and connected to the wastewater barrel through a hose. The inner pipe 1 is closed, and nitrogen is introduced into the first water inlet 15 that is not connected to the water pump. The oxygen in the inner pipe 1 is passed through the outlet 5 and the second gas measuring port 16 at the top. After the inner tube 1 is filled with nitrogen, the water inlet and outlet holes 5 and the first gas measuring port 7 are blocked to make the inner tube 1 in a closed state; the device is placed in a constant temperature incubator (avoiding light), and the water pump is turned on. The sewage flows into the inner tube 1 from the first water inlet hole 15 in the form of a continuous flow, stays in the inner tube 1 for a certain period of time, and is discharged into the wastewater bucket from the water outlet 5. The system operates continuously at 25°C; water and gas samples are collected from the first sampling tube 6 and the second gas measuring port 16 at the top at a certain frequency. The pollutant content, organic matter molecular weight change, and greenhouse gas concentration in the water sample are tested, and the carbon pollution transformation law of mixed sewage in the rainwater pipe on sunny days is explored;

[0061] When the sediment in the inner tube 1 needs to be discharged, the left end cover 8 and the left tube cover 2 are first removed, and then the fixing rod 30 can be pushed so that the fixing rod 30 drives the first magnetic block 28 to move to the bottom of the block 24. At this time, the block 24 will be sucked out of the card slot 26. At this time, the left sediment baffle 4 can be taken out from the inner tube 1, and then the sediment can be manually cleaned from the inner tube 1. After cleaning, a peristaltic pump is connected to the first water inlet 15 through a pipeline to allow flushing water to be flushed into the inner tube 1 to flush and discharge the remaining sediment. , thereby achieving the effect of cleaning the inner tube 1, by placing the left sediment baffle 4 into the inner tube 1 and allowing the positioning post 22 to enter the positioning hole 29, the side wall of the left sediment baffle 4 will push the clamping block 24 to move downward, and then when the connecting groove 23 is aligned with the clamping groove 26, the first spring will push the clamping block 24 to engage with the clamping groove 26, thereby limiting the left sediment baffle 4 in the inner tube 1. Through this connection method, the left sediment baffle 4 can be flexibly removed, which is convenient for subsequent sediment cleaning;

[0062] When the inner tube 1 is flushed, the sediment will fall to the bottom surface of the inner wall of the inner tube 1. If there is sediment that cannot be removed, the semicircular ring 21 can be removed, and then the sealing plate 33 can be moved so that the sealing plate 33 no longer seals the port of the left sediment baffle 4. The sealing plate 33 can be positioned with the help of the positioning component, and then the left sediment baffle 4 can be placed in the inner tube 1. The longer long rod can be installed on the left sediment baffle 4 by screws, and then the left sediment baffle 4 can be pushed to move in the inner tube 1. At this time, the arc plate 32 can push the sediment remaining on the inner wall of the inner tube 1 into the arc plate 32. After the collection is completed, the positioning component is no longer used to limit the sealing plate 33. At this time, the sealing plate 33 will be The arc plate 32 slides due to the force to seal the port of the arc plate 32, thereby collecting the sediment in the arc plate 32, and then the left sediment baffle 4 is taken out to process the sediment collected in the arc plate 32; the present application slides the sealing plate 33 to move the circular hole on the sealing plate 33 to the circular rod 34, at this time the third spring will pull the disc 35 to allow the circular rod 34 to enter the circular hole, thereby positioning the sealing plate 33, and when the arc plate 32 completes collecting the sediment, the arc plate 32 will move close to the left sediment baffle 4, and at this time the second magnetic block 31 will attract the circular rod 34, so that the circular rod 34 is detached from the circular hole, and the arc plate 32 will slide due to gravity to seal the port of the arc plate 32.

[0063] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0065] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed sewage carbon-pollution conversion simulation device in a rainwater system, comprising an outer box (17), an inner tube (1) being arranged in the outer box (17), and a connecting mechanism being arranged between the outer box (17) and the inner tube (1); Its characteristics are: A detachably mounted left tube cover (2) and an external flange are provided on one side of the inner tube (1), and a fixedly mounted right tube cover (3) is provided on the other side of the inner tube (1); The right pipe cover (3) is provided with a pair of first water inlet holes (15) for receiving rainwater and sewage respectively; the left pipe cover (2) is provided with a group of water outlet holes (5) and a first sampling tube (6); the water outlet holes (5) are connected to the first water outlet pipe, and the first water outlet pipe and the first sampling tube (6) are provided with valves; the water outlet holes (5) and the first water outlet pipe can correspond to various water levels in the rainwater pipe, and the continuous flow of sewage can flow into the inner tube (1) from the first water inlet hole (15) in the inner tube (1), and be discharged into the waste water bucket from the water outlet hole (5) in the inner tube (1); A first gas measuring port (7) is provided at the top of the inner tube (1), and a pair of second gas measuring ports (16) are provided at the top of the outer box (17), wherein the first gas measuring port (7) is sealed and plugged with the corresponding second gas measuring ports (16); a left sediment baffle (4) and a right sediment baffle (5) are provided in the inner tube (1), and a fixing mechanism and a sealing plate (33) for fixing and sealing the left sediment baffle (4) are provided in the inner tube (1); A detachably mounted left end cover (8) and an external flange are provided on one side of the outer box (17); a right end cover (9) is fixedly installed on one side of the outer box (17); a second water outlet pipe (12) is provided at the bottom of the right end cover (9); a valve is provided on the second water outlet pipe (12); a second sampling pipe (11) is connected to the left end cover (8); a valve is provided on the second sampling pipe (11); a first circulation pipe (10) is provided on the left end cover (8) of the outer box (17); a second circulation pipe (14) is provided on the right end cover (9), forming a circulation mechanism for water circulation in the outer box; a group of second water inlet holes (19) sealed and plugged with the first water inlet hole (15) are provided at the center of the right end cover (9); the inner pipe (1) is assembled in the outer box (17); the right pipe cover (3) and the right end cover (9) are sealed and plugged.

2. The device for simulating carbon-pollution conversion of mixed sewage in a rainwater system according to claim 1, characterized in that: The connecting mechanism comprises an external flange provided on the left tube cover (2) and the left end cover (8); a bracket (13) is provided in the outer box (17) to play a supporting and fixing role; the inner tube (1) and the outer box (17) are fixedly connected by directly adhering the right end cover (9) to the right tube cover (3) and the bracket (13) at the bottom of the inner tube (1).

3. The device for simulating carbon-pollution conversion of mixed sewage in a rainwater system according to claim 2, characterized in that: The right side of the inner tube (1) is fixedly connected with a right sediment baffle (5), and the right sediment baffle (5) and the left sediment baffle (4) are fixed to the inner tube (1) at a distance of 1 to 2 cm from the tube mouth of the inner tube (1). The left sediment baffle (4) is arched, the arc edge of the arch is a major arc, and the diameter is the same as the inner diameter of the inner tube (1). The right sediment baffle (5) is circular, and the diameter is the same as the inner diameter of the inner tube (1). The right sediment baffle (5) is punched with a square hole away from the sediment portion as a water distribution wall.

4. The device for simulating carbon-pollution conversion of mixed sewage in a rainwater system according to claim 3, characterized in that: The fixing mechanism comprises a semicircular ring (21) provided with an inner tube (1), connected to the left side of the left sediment baffle, a positioning column (22) fixedly connected to the side of the semicircular ring (21) close to the left sediment baffle (4), a positioning hole (29) is provided on the side of the left sediment baffle (4) corresponding to the positioning column (22), a connecting groove (23) is provided on the outer wall of the positioning column (22), a clamping block (24) is slidably connected in the connecting groove (23), the top surface of the clamping block (24) is inclined, and the bottom surface of the clamping block (24) is aligned with the connecting groove (23). ) is fixedly connected between the inner walls of the two springs, the inner wall of the positioning hole (29) is provided with a slot (26) for engaging with the block (24), the side of the left sediment baffle (4) away from the semicircular ring (21) is slidably connected with a fixing rod (30) extending into the positioning hole (29), the side of the positioning column (22) close to the fixing rod (30) is provided with a circular groove (25), the circular groove (25) is slidably connected with a first magnetic block (28) magnetically attracted to the block (24), and a connecting rod is fixedly connected between the fixing rod (30) and the first magnetic block (28).

5. The device for simulating carbon-pollution conversion of mixed sewage in a rainwater system according to claim 4, characterized in that: The left sediment baffle (4) is fixedly connected to a hollow arc plate (32) on one side close to the semicircular ring (21), the bottom surface of the arc plate (32) is in contact with the inner wall of the inner tube (1), the arc plate (32) is opened on one side close to the semicircular ring (21), the top surface of the arc plate (32) is slidably connected to a sealing plate (33) for sealing the open end, a positioning assembly for positioning the sealing plate (33) is provided on the arc plate (32), and the semicircular ring (21) and the inner tube (1) are fixedly mounted by screws.

6. The device for simulating carbon-pollution conversion of mixed sewage in a rainwater system according to claim 5, characterized in that: The positioning assembly comprises a round rod (34) slidably connected to the arc plate (32); a round hole corresponding to the round rod (34) is opened on the sealing plate (33); a disc (35) is fixedly connected to the round rod (34); a third spring is fixedly connected between the disc (35) and the arc plate (32); and a second magnetic block (31) magnetically attracted to the round rod (34) is fixedly connected to the right side of the right sediment baffle (20), which is equivalent to the disc (35) and is at the same height as the round rod.

7. A simulated experimental method for carbon-waste conversion of mixed sewage in a rainwater system, the method using the simulated device for carbon-waste conversion of mixed sewage in a rainwater system as described in claim 6, characterized in that: The method comprises the following steps: S1: By keeping the inner pipe (1) and the outer box (17) open, an experiment is conducted to simulate the carbon-pollution conversion law of mixed sewage in the rainwater pipe during the non-rainy season. The stabilized rainwater pipe sediment is filled into the inner pipe (1). The sediment height shall not exceed 50% of the height of the left sediment baffle. S2: After the sediment is filled, the left pipe cover (2) is assembled on the left side of the inner pipe (1), the first water inlet (4) is connected to the sewage storage barrel through a water pump, the sewage outlet (5) corresponding to the water level in the rainwater pipe is selected, and connected to the wastewater barrel through a hose, and the remaining outlet holes (5) are kept closed by water stop clamps on the connected hoses; S3: The inner tube (1) is closed, and nitrogen is introduced from the first water inlet (4) not connected to the water pump. The oxygen in the inner tube (1) is discharged from the water outlet (5) and the second gas measuring port (16) at the top. After the inner tube (1) is filled with nitrogen, the water inlet and outlet (5) and the first gas measuring port (7) are blocked, so that the inner tube (1) is in a closed state.

8. The method for simulating carbon pollution conversion in mixed sewage in a rainwater system according to claim 7, characterized in that: The method further comprises the steps of: S4: Place the device in a constant temperature incubator, turn on the water pump, and the sewage flows into the inner tube (1) from the first water inlet (4) in the form of a continuous flow. After staying in the inner tube (1) for a certain period of time, it is discharged into the wastewater bucket from the water outlet (5); S5: Collect water samples and gas samples from the first sampling tube (6) and the second gas measuring port (16) at a certain frequency, detect the pollutant content in the water sample, the change in the molecular weight of organic matter, etc., and the greenhouse gas concentration in the gas, and explore the carbon pollution transformation law of mixed sewage in the rainwater pipe on sunny days; S6: Continue to use the inner tube (1) and the outer box (17) together, and use the first water inlet hole (15) on the inner tube (1) and the second water outlet pipe (12) on the outer box (17) to simulate the experiment on the carbon pollution conversion law of mixed sewage in the drainage system during the rainy season. After the experiment is completed, only the outer box (17) and the first circulation holes and the second circulation holes on the left and right sides of the outer box (17) are used to simulate the carbon pollution conversion law experiment after the impact pollution on rainy days is discharged into the urban water body.

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