CN113445613A - Municipal drainage method - Google Patents
Municipal drainage method Download PDFInfo
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- CN113445613A CN113445613A CN202110765805.5A CN202110765805A CN113445613A CN 113445613 A CN113445613 A CN 113445613A CN 202110765805 A CN202110765805 A CN 202110765805A CN 113445613 A CN113445613 A CN 113445613A
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- sedimentation tank
- rainwater
- sand
- fine sand
- box culvert
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0403—Gullies for use in roads or pavements with a sediment trap
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
- E03F5/0404—Gullies for use in roads or pavements with a permanent or temporary filtering device; Filtering devices specially adapted therefor
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/20—Measuring flow in sewer systems
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Sewage (AREA)
Abstract
The invention discloses a municipal drainage method, which comprises the following steps: when raining, rainwater enters the box culvert after being primarily filtered by a second cover plate on the box culvert, and the rainwater is secondarily filtered by the filter screen; rainwater filtered by the filter screen flows into a fine sand sedimentation tank, and the intercepted coarse sand flows into a sand accumulation groove at the bottom of the coarse sand sedimentation tank; after preliminary sedimentation, rainwater in the coarse sand sedimentation tank is filtered through a first filtering hole in a first guide wall and enters a fine sand sedimentation tank; after secondary sedimentation, the rainwater in the fine sand sedimentation tank enters the sludge sedimentation tank after being filtered by a second filtering hole on a second guide wall; rainwater in the sludge settling tank moves upwards, and flows into a drain pipe after three times of settling in the settling pipe. According to the municipal drainage method, the coarse sand sedimentation tank, the fine sand sedimentation tank and the sludge sedimentation tank are sequentially arranged to filter sand grains with different specifications in rainwater, so that the sand grains are effectively prevented from entering a drainage pipe, and a sewer is prevented from being blocked.
Description
Technical Field
The invention belongs to the technical field of urban drainage waterlogging prevention engineering, and particularly relates to a municipal drainage method.
Background
A large amount of organic matters, heavy metals and solid pollutants are carried in initial rainwater runoff, along with the continuous acceleration of the urbanization process, the urban water system is seriously threatened, meanwhile, sundries which are washed off by rainwater are more, rainwater sundries carry a large amount of leaves and silt to enter a sewer pipeline together, the cleaning is difficult, the water cross section of a sewer is continuously reduced, and the municipal drainage capacity is continuously reduced.
Disclosure of Invention
Aiming at the defects, the invention provides a municipal drainage method which can effectively prevent solid substances such as sand grains and the like from entering a drainage pipe and prevent a sewer from being blocked.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a municipal drainage method comprising the steps of:
step 10), when raining, the rainwater passes through a second cover plate on the box culvert, and the second cover plate performs primary filtration on the rainwater;
step 20), all the rainwater entering the box culvert falls on a filter screen, and the filter screen performs secondary filtration on the rainwater; rainwater filtered by the filter screen flows into the fine sand sedimentation tank under the diversion and blocking of the first diversion plate, and coarse sand intercepted by the filter screen flows into a sand accumulation groove at the bottom of the coarse sand sedimentation tank;
step 30), after the rainwater in the coarse sand sedimentation tank is subjected to primary sedimentation, filtering the rainwater through a first filtering hole in a first flow guide wall, and feeding the rainwater into a fine sand sedimentation tank;
step 40), after secondary sedimentation, filtering the rainwater in the fine sand sedimentation tank through a second filtering hole in a second guide wall, and then feeding the rainwater into a sludge sedimentation tank;
and 50) moving the rainwater in the sludge sedimentation tank upwards, performing tertiary sedimentation in the sedimentation pipe, and then flowing into a drain pipe.
As a further improvement of the embodiment of the present invention, in the step 20), the rainwater filtered by the filter screen flows into the fine sand sedimentation tank under the diversion and blocking of the first diversion plate, and specifically includes:
the rainwater filtered by the filter screen falls on the second guide plate, so that the first speed reduction of the rainwater is realized; one part of the rainwater falling on the second guide plate slides down along the surface of the second guide plate and falls into the fine sand sedimentation tank, and the other part impacts the first guide wall to realize the second speed reduction of the rainwater; one part of the rainwater impacting on the first guide wall flows into the fine sand sedimentation tank along the first guide wall through a gap between the second guide plate and the first guide wall, and the other part of the rainwater reversely impacts the lower part of the second guide plate again and flows into the fine sand sedimentation tank along the second guide plate, so that the third speed reduction of the rainwater is realized; and through three times of speed buffering, the impact force and the impact range of rainwater on water in the fine sand sedimentation tank are reduced, and the stirring of the rainwater on sand grains at the bottom of the fine sand sedimentation tank is slowed down.
As a further improvement of the embodiment of the present invention, the method further includes:
step 60) after the rainwater stops, if the bottom of the box culvert needs to be washed, connecting a washing pipe in the sludge sedimentation tank with a movable air compressor, spraying compressed air from the bottom of the sludge sedimentation tank through the washing pipe, washing and blowing the sediments at the bottom of the sludge sedimentation tank and the fine sand sedimentation tank, and pushing the sediments at the bottom of the sludge sedimentation tank and the fine sand sedimentation tank to move forwards by the compressed air so that the sediments enter a sand accumulation groove at the bottom of the coarse sand sedimentation tank; the flushing pipe is used for flushing and simultaneously oxygenating the water body in the box culvert.
As a further improvement of the embodiment of the present invention, the step 60) further includes:
and the air suction device is connected with the movable air compressor, and the solid sediment in the sand accumulation groove is lifted out of the box culvert through the sand suction hopper.
As a further improvement of the embodiment of the present invention, the method further includes:
step 70) when the rain does not fall for a long time, an oxygen concentration sensor positioned in the box culvert detects that the oxygen content in the water is lower than a set value; the flushing pipe is connected with a movable air compressor, and compressed air is sprayed out from the bottom of the sludge sedimentation tank through the flushing pipe to oxygenate the water body in the box culvert.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: according to the municipal drainage method provided by the invention, through the coarse sand sedimentation tank, the fine sand sedimentation tank and the sludge sedimentation tank which are sequentially arranged, sand grains with different specifications in rainwater are filtered, the sand grains are effectively prevented from entering a drainage pipe, the blockage of a sewer is prevented, and the normal operation of a municipal drainage system is ensured.
Drawings
FIG. 1 is a schematic diagram of a municipal drainage system in accordance with an embodiment of the invention.
The figure shows that: the box culvert 1, first guide plate 2, first guide wall 3, second guide plate 4, first filtration pore 5, coarse sand sedimentation tank 6, getter device 7, suction hopper 8, long-pending sand groove 9, first row of sand mouth 10, fine sand sedimentation tank 11, first slope 12, second row of sand mouth 13, second slope 14, mud sedimentation tank 15, wash mouthful 16, wash pipe 17, oxygen concentration sensor 18, drain pipe 19, sedimentation pipe 20, second filtration pore 21, second guide wall 22, second hinge 23, first hinge 24, filter screen 25, second apron 26, first apron 27.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
The embodiment of the invention provides a municipal drainage method, which adopts a municipal drainage system. The municipal drainage system comprises a box culvert 1 and a drain pipe 19 as shown in figure 1, wherein the drain pipe 19 is connected with one side of the box culvert 1. The top end of the box culvert 1 is provided with an opening, and when raining, rainwater flows into the box culvert 1 from the opening. Vertically in the box culvert 1 be provided with first guide wall 3 and second guide wall 22, first guide wall 3 and second guide wall 22 separate the box culvert in proper order and form coarse sand sedimentation tank 6, fine sand sedimentation tank 11 and sludge sedimentation tank 15, first guide wall 3 is located between coarse sand sedimentation tank 6 and the fine sand sedimentation tank 11, second guide wall 22 is located between fine sand sedimentation tank 11 and the sludge sedimentation tank 15, coarse sand sedimentation tank 6, fine sand sedimentation tank 11 and sludge sedimentation tank 15 all have the top opening. The top of first guide wall 3 has the distance of predetermineeing apart from the top of box culvert 1 to the open-top of coarse sand sedimentation tank 6 is linked together with the open-top of fine sand sedimentation tank 11. The sludge settling tank 15 is communicated with the inlet of a drain pipe 19. The top of box culvert 1 is equipped with first apron 27, and first apron 27 covers the top opening of sludge sedimentation tank 15, and the entry that is located sludge sedimentation tank 15 top of box culvert 1 is sealed. The top of box culvert 1 still is equipped with second apron 26, and second apron 26 covers the top opening of coarse sand sedimentation tank 6 and fine sand sedimentation tank 11, and the entry that is located coarse sand sedimentation tank 6 and fine sand sedimentation tank 11 top of box culvert 1 is covered by second apron 26 promptly. The second cover plate 26 is provided with a rain water hole. A filter screen 25 is arranged above the first guide wall 3, one side of the filter screen 25 is connected with the inner wall of the box culvert 1 above the fine sand sedimentation tank 11, and the other side of the filter screen 25 is obliquely and downwards arranged and is positioned above the coarse sand sedimentation tank 6. The first guide wall 3 is provided with a first filtering hole 5, and rainwater in the coarse sand sedimentation tank 6 flows into the fine sand sedimentation tank 11 after being filtered by the first filtering hole 5. The second guide wall 22 is provided with a second filtering hole 21, and the rainwater in the fine sand sedimentation tank 11 flows into the sludge sedimentation tank 15 after being filtered by the second filtering hole 21. Still be equipped with first guide plate 2 between the top of filter screen 25 and first guide wall 3, the one end of first guide plate 2 is connected with the free side of filter screen 25, and the other end of first guide plate 2 is connected with the top of first guide wall 3. A sedimentation pipe 20 is arranged in the sludge sedimentation tank 15, and two ends of the sedimentation pipe 20 are respectively fixed on the inner wall of the box culvert 1 and the second guide wall 22.
The municipal drainage method provided by the embodiment of the invention comprises the following steps:
step 10) during rain, the rainwater passes through the second cover plate 26 on the box culvert 1, and the second cover plate 26 filters the rainwater for the first time.
And 20) completely dropping all the rainwater entering the box culvert 1 on the filter screen 25, and carrying out secondary filtration on the rainwater by the filter screen 25. The rainwater filtered by the filter screen 25 flows into the fine sand sedimentation tank 11 under the diversion and blocking of the first diversion plate 2, and the coarse sand intercepted by the filter screen 25 flows into the sand accumulation groove 9 at the bottom of the coarse sand sedimentation tank 6.
And step 30), after the rainwater in the coarse sand sedimentation tank 6 is subjected to primary sedimentation, the rainwater enters the fine sand sedimentation tank 11 through the filtration of the first filtration holes 5 on the first flow guide wall 3.
And step 40), after secondary sedimentation, filtering the rainwater in the fine sand sedimentation tank 11 through the second filtering holes 21 on the second guide wall 22, and then entering the sludge sedimentation tank 15.
And 50) moving the rainwater in the sludge settling tank 15 upwards, settling for three times in the settling pipe 30, and then flowing into the drain pipe 19.
In the method of the above embodiment, when rainwater enters the box culvert 1 through the second cover plate 26, the rainwater holes in the second cover plate 26 can prevent solid substances such as large branches and garbage in the rainwater from entering the box culvert 1, so that precipitates in the box culvert 1 are reduced. Rainwater entering the box culvert 1 can pass through the secondary filtration of the filter screen 25 and then flows into the coarse sand sedimentation tank 6 and the fine sand sedimentation tank 11, so that solid substances flowing into the coarse sand sedimentation tank 6 and the fine sand sedimentation tank 11 are reduced, and the rainwater filtration effect is improved. The first guide plate 2 can stabilize the free side of the filter screen 25, and the reliable use of the filter screen 25 is ensured. The rainwater filtered by the filter screen 25 can completely enter the fine sand sedimentation tank 11 after being guided and blocked by the first guide plate 2, and cannot enter the coarse sand sedimentation tank 6. The coarse sand that filter screen 25 was held back all gets into in coarse sand sedimentation tank 6 under the effect of blockking of first guide plate 2, and can not fall into fine sand sedimentation tank 11, realizes the high-efficient reposition of redundant personnel of coarse sand and rainwater after filtering. The sedimentation tube 20 in the sludge sedimentation tank 15 is used for further carrying out mud-water sedimentation separation, improves the filter effect for rainwater in the sludge sedimentation tank 15 all passes through the filtration of sedimentation tube 20 before entering into drain pipe 19, makes more tiny mud granule deposit in the bottom of sludge sedimentation tank 15, guarantees not that the precipitate gets into drain pipe 19, effectively prevents the jam of sewer.
In the method provided by the embodiment of the invention, through primary filtration of the second cover plate 26 and secondary filtration of the filter screen 25, primary sedimentation of the coarse sand sedimentation tank 6, filtration of the first filter hole 5, secondary sedimentation of the fine sand sedimentation tank 11, filtration of the second filter hole 21 and tertiary sedimentation filtration of the sludge sedimentation tank 15 are sequentially carried out, sand grains with different specifications in rainwater are filtered and sedimentated, the sand grains are effectively prevented from entering a drain pipe, the blockage of a sewer is prevented, and the normal operation of a municipal drainage system is ensured.
Preferably, a second guide plate 4 is arranged in the fine sand sedimentation tank 11, and the second guide plate 4 is positioned below the first guide plate 2. One side of the second guide plate 4 is connected with the inner wall of the box culvert 1, and a gap is formed between the other side of the second guide plate 4 and the first guide wall 3.
In the step 20), the rainwater filtered by the filter screen 25 flows into the fine sand sedimentation tank 11 under the diversion and blocking of the first diversion plate 2, and specifically includes:
the rainwater filtered by the filter screen 25 falls on the second guide plate 4, so that the first speed reduction of the rainwater is realized; one part of the rainwater falling on the second guide plate 4 slides down along the surface of the second guide plate 4 and falls into the fine sand sedimentation tank 11, and the other part impacts the first guide wall 3, so that the second speed reduction of the rainwater is realized; one part of the rainwater impacting on the first guide wall 3 flows into the fine sand sedimentation tank 11 along the first guide wall 3 through a gap between the second guide plate 4 and the first guide wall 3, and the other part of the rainwater reversely impacts the lower part of the second guide plate 4 again and flows into the fine sand sedimentation tank 11 along the second guide plate 4, so that the third speed reduction of the rainwater is realized; through three times of speed buffering, the impact force and the impact range of rainwater on water in the fine sand sedimentation tank 11 are reduced, and the stirring of rainwater on sand grains at the bottom of the fine sand sedimentation tank 11 is slowed down. Therefore, the fine sand at the bottom of the fine sand sedimentation tank 11 cannot float upwards and cannot enter the sludge sedimentation tank 15.
As shown in FIG. 1, in the municipal drainage system adopted in the method of the embodiment, a first sand discharge port 10 is formed at the bottom end of the first guide wall 3, and the coarse sand sedimentation tank 6 is communicated with the bottom of the fine sand sedimentation tank 11 through the first sand discharge port 10. The bottom end of the second guide wall 22 is provided with a second sand discharge port 13, and the bottoms of the fine sand sedimentation tank 11 and the sludge sedimentation tank 15 are communicated through the second sand discharge port 13. The sand grains precipitated at the bottom in the coarse sand sedimentation tank 6, the fine sand sedimentation tank 11 and the sludge sedimentation tank 15 can be gathered in the same tank through the first sand discharge port 10 and the second sand discharge port 13, and the cleaning is convenient.
The bottom of the sludge sedimentation tank 15 is provided with a second slope 14, the bottom of the fine sand sedimentation tank 11 is provided with a first slope 12, and the bottom of the coarse sand sedimentation tank 6 is provided with a sand accumulation groove 9. The settled sand in the sludge settling tank 15 flows into the fine sand settling tank 11 through the second sand discharge port 13 along the second slope 14, the settled sand in the fine sand settling tank 11 flows into the coarse sand settling tank 6 through the first sand discharge port 10 along the first slope 12, and finally the settled sand in the three tanks is gathered in the sand accumulation tank 9, so that only the sand accumulation tank 9 needs to be cleaned, and the cleaning is convenient. Preferably, the slope of the second slope 14 is larger than that of the first slope 12, so that the sludge in the sludge settling tank 15 can move towards the sand accumulation groove 9 and can be finally accumulated in the sand accumulation groove 9.
A mud suction hopper 8 is arranged in the sand accumulation groove 9. The mud suction hopper 8 is provided with an air suction device 7, the air suction device 7 lifts precipitated sand in the sand accumulation groove 9 out of the pool through compressed air with certain pressure, and a movable air compressor can be used for providing an air source to carry out air stripping on the precipitated sand.
A flushing pipe 17 is arranged in the sludge sedimentation tank 15. The flushing pipe 17 is connected with a movable air compressor, a flushing port 16 is arranged on the flushing pipe 17, and the flushing port 16 faces to the lower side of the sludge sedimentation tank 15. The provision of the flushing pipe 17 has two functions: firstly, wash the bottom of the pool deposit to mud sedimentation tank 15 and fine sand sedimentation tank 11 and sweep, compressed air promotes the deposit of bottom of the pool and moves forward, and the deposit of bottom of the pool loops through second sand discharge port 13 and first sand discharge port 10 and enters into long-pending sand groove 9. Secondly, the water in the pool is oxygenated through the flushing pipe 17, so that the oxygen content in the water is increased, the deterioration of the water is prevented, and the working environment is improved.
An oxygen concentration sensor 18 is also arranged in the sludge sedimentation tank 15. The oxygen concentration sensor 18 is used to detect the oxygen content of the water in the tank, and the oxygen concentration sensor 18 may employ an oxygen sensor KE-25 of fegarro, japan. When the oxygen content in the water is lower than a set value, the rainwater in the box culvert is anoxic, the water body is easy to deteriorate, toxic and harmful gases such as hydrogen sulfide are generated, the working environment is poor, and at the moment, the water body at the bottom of the pond is oxygenated by connecting the movable air compressor, so that the water quality in the pond is improved.
Preferably, the method of this embodiment further includes:
step 60) after the rainwater stops, if the bottom of the box culvert 1 needs to be washed, connecting a washing pipe 17 in the sludge sedimentation tank 15 with a movable air compressor, spraying compressed air from the bottom of the sludge sedimentation tank 15 through the washing pipe 17, washing and purging sediments at the bottom of the sludge sedimentation tank 15 and the fine sand sedimentation tank 11, and pushing the sediments at the bottom of the sludge sedimentation tank 15 and the fine sand sedimentation tank 11 to move forwards by the compressed air so that the sediments enter a sand accumulation groove 9 at the bottom of the coarse sand sedimentation tank 6; the flushing pipe 17 is used for flushing and simultaneously oxygenating the water body in the box culvert 1.
In the above embodiment, the mobile air compressor and the flushing pipe 17 are used to flush the bottom of the tank, on one hand, the solid sediment at the bottom of the tank flows through the second sand discharge port 13 and the first sand discharge port 10 into the sand accumulation groove 9 along the second slope 14 and the first slope 12 in sequence; on the other hand, when the rainwater is flushed, oxygen in the air enters the rainwater at the bottom of the pool to oxygenate the water body in the pool, so that the oxygen content in the rainwater is increased. The method can conveniently and timely clean the solid precipitates in the box culvert, and effectively prevent the deterioration of the water body in the box culvert due to oxygen deficiency, thereby improving the environment of the drainage system.
Preferably, the step 60) further comprises:
the air suction device 7 is connected with a movable air compressor, and solid sediments in the sand accumulation groove 9 are lifted out of the box culvert 1 through the sand suction hopper 8.
Preferably, the method of this embodiment further includes:
step 70) when the rain does not fall for a long time, the oxygen concentration sensor 18 positioned in the box culvert 1 detects that the oxygen content in the water is lower than a set value; the flushing pipe 17 is connected with a movable air compressor, and compressed air is sprayed out from the bottom of the sludge sedimentation tank 15 through the flushing pipe 17 to oxygenate the water body in the box culvert 1.
According to the method provided by the embodiment of the invention, when the water body in the box culvert is anoxic, the water body in the box culvert is timely oxygenated, the oxygen content in water is increased, and the water quality and the working environment are improved.
The embodiments of the present invention are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the content of the claims of the present invention should be regarded as the technical scope of the present invention.
Claims (5)
1. A municipal drainage method is characterized by comprising the following steps:
step 10), when raining, the rainwater passes through a second cover plate (26) on the box culvert (1), and the second cover plate (26) is used for primarily filtering the rainwater;
step 20), all the rainwater entering the box culvert (1) falls on the filter screen (25), and the filter screen (25) performs secondary filtration on the rainwater; rainwater filtered by the filter screen (25) flows into the fine sand sedimentation tank (11) under the diversion and blocking of the first diversion plate (2), and coarse sand intercepted by the filter screen (25) flows into a sand accumulation groove (9) at the bottom of the coarse sand sedimentation tank (6);
step 30), after primary precipitation, the rainwater in the coarse sand sedimentation tank (6) enters a fine sand sedimentation tank (11) through filtration of a first filter hole (5) on a first guide wall (3);
step 40), after secondary sedimentation, the rainwater in the fine sand sedimentation tank (11) enters a sludge sedimentation tank (15) through filtration of a second filtration hole (21) on a second guide wall (22);
and 50), moving the rainwater in the sludge settling tank (15) upwards, settling for three times in the settling pipe (30), and then flowing into a drain pipe (19).
2. The municipal drainage method according to claim 1, wherein in the step 20), the rainwater filtered by the filter screen (25) flows into the fine sand settling tank (11) under the diversion and blocking of the first diversion plate (2), and the method comprises the following steps:
the rainwater filtered by the filter screen (25) falls on the second guide plate (4) completely, so that the first speed reduction of the rainwater is realized; one part of the rainwater falling on the second guide plate (4) slides down along the surface of the second guide plate (4) and falls into the fine sand sedimentation tank (11), and the other part impacts the first guide wall (3) to realize the second speed reduction of the rainwater; one part of rainwater impacting on the first guide wall (3) flows into the fine sand sedimentation tank (11) through a gap between the second guide plate (4) and the first guide wall (3) along the first guide wall (3), and the other part of rainwater reversely impacts the lower part of the second guide plate (4) again and flows into the fine sand sedimentation tank (11) along the second guide plate (4), so that the third speed reduction of the rainwater is realized; through three times of speed buffering, the impact force and the impact range of rainwater on water in the fine sand sedimentation tank (11) are reduced, and the stirring of the rainwater on sand grains at the bottom of the fine sand sedimentation tank (11) is slowed down.
3. The municipal drainage method of claim 1, further comprising:
step 60) after the rainwater stops, if the bottom of the box culvert (1) needs to be washed, connecting a washing pipe (17) in the sludge sedimentation tank (15) with a movable air compressor, spraying compressed air from the bottom of the sludge sedimentation tank (15) through the washing pipe (17), washing and blowing sediments at the bottoms of the sludge sedimentation tank (15) and the fine sand sedimentation tank (11), and pushing the sediments at the bottoms of the sludge sedimentation tank (15) and the fine sand sedimentation tank (11) to move forwards by the compressed air so that the sediments enter a sand accumulation groove (9) at the bottom of the coarse sand sedimentation tank (6); the flushing pipe (17) is used for flushing and simultaneously oxygenating the water body in the box culvert (1).
4. The municipal drainage method according to claim 3, wherein said step 60) further comprises:
the air suction device (7) is connected with a movable air compressor, and solid sediment in the sand accumulation groove (9) is lifted out of the box culvert (1) through a sand suction hopper (8).
5. The municipal drainage method of claim 1, further comprising:
step 70), when the rain does not fall for a long time, an oxygen concentration sensor (18) in the box culvert (1) detects that the oxygen content in the water is lower than a set value; the flushing pipe (17) is connected with a movable air compressor, and compressed air is sprayed out from the bottom of the sludge sedimentation tank (15) through the flushing pipe (17) to oxygenate the water body in the box culvert (1).
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| CN202110765805.5A CN113445613B (en) | 2021-07-05 | 2021-07-05 | Municipal drainage method |
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| CN202110765805.5A CN113445613B (en) | 2021-07-05 | 2021-07-05 | Municipal drainage method |
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| CN113445613B (en) | 2022-04-08 |
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Effective date of registration: 20230816 Address after: Room 602, Unit 2, Building 5, Jinshihua City, No. 8 North 2nd Ring, Weiyang District, Xi'an City, Shaanxi Province, 710000 Patentee after: Shaanxi Yuteng Daming Construction Engineering Co.,Ltd. Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Effective date of registration: 20230816 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: No. 188 Xinle Road, Liuhe District, Nanjing City, Jiangsu Province Patentee before: NANJING POLYTECHNIC INSTITUTE |