CN113152623A - Municipal rainwater and sewage separation device and method - Google Patents
Municipal rainwater and sewage separation device and method Download PDFInfo
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- CN113152623A CN113152623A CN202110525283.1A CN202110525283A CN113152623A CN 113152623 A CN113152623 A CN 113152623A CN 202110525283 A CN202110525283 A CN 202110525283A CN 113152623 A CN113152623 A CN 113152623A
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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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/006—Pneumatic sewage disposal systems; accessories specially adapted therefore
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/10—Collecting-tanks; Equalising-tanks for regulating the run-off; Laying-up basins
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F2201/00—Details, devices or methods not otherwise provided for
- E03F2201/10—Dividing the first rain flush out of the stormwater flow
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Abstract
The invention provides a municipal rainwater and sewage separating device and a method, the municipal rainwater and sewage separating device comprises a pool body, a cover plate, a partition wall and a separating channel with an opening, wherein the cover plate is arranged at the top end of the pool body, and a rainwater inlet is formed in the cover plate; the partition wall is arranged in the tank body and divides the tank body into a rainwater tank and a sewage tank; the diversion trench is rotationally connected with the inner wall of the tank body through a rotating shaft and is positioned between the top end of the partition wall and the rainwater inlet; the opening of the diversion trench is opposite to the rainwater inlet, and the side wall of the diversion trench, which is positioned on one side of the sewage pool, is provided with a water outlet hole; the water outlet quantity of the water outlet hole is less than the water inlet quantity of the rainwater inlet in heavy rain, medium rain and light rain and is more than or equal to the water inlet quantity of the rainwater inlet in light rain. The municipal rainwater and sewage shunting device and method provided by the invention realize sewage and rainwater shunting when the rainfall is different, so that pollution caused by discharging rainwater and sewage mixed water with substandard water quality into a river channel is avoided, and simultaneously, the phenomenon that the rainwater and sewage mixed water with substandard water quality is conveyed to a sewage treatment plant to waste resources of the sewage treatment plant is also avoided.
Description
Technical Field
The invention belongs to the technical field of municipal drainage, and particularly relates to a municipal rainwater and sewage flow dividing device and method.
Background
At present, in old cities in China, rainwater and sewage are still combined into a drainage system, a lot of sewage is directly discharged into rivers along with rainwater, the problem of black and odorous urban water is prominent day by day, and the environment is seriously polluted. One part of the rainwater and sewage interception devices are arranged at the river inlets, rainwater and sewage are intercepted simultaneously and sent to a sewage treatment plant, however, the treatment capacity of the sewage treatment plant is increased, and resources of the sewage treatment plant are seriously wasted.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the municipal rainwater and sewage separating device and method are provided, the flow of sewage discharged into a river along with rainwater is reduced, and the problem of pollution to the water quality of the river when rainwater and sewage are discharged in a converging manner is solved.
In order to solve the technical problems, in one aspect, an embodiment of the present invention provides a municipal rainwater and sewage separation device, including a tank body, a cover plate, a partition wall, and a separation trough with an opening, where the cover plate is arranged at the top end of the tank body, and the cover plate is provided with a rainwater inlet communicated with an inner cavity of the tank body; the partition wall is arranged in the tank body and divides the tank body into a rainwater tank and a sewage tank; the diversion trench is rotationally connected with the inner wall of the tank body through a rotating shaft and is positioned between the top end of the partition wall and the rainwater inlet; the opening of the diversion trench is opposite to the rainwater inlet, and the side wall of the diversion trench, which is positioned at one side of the sewage pool, is provided with a water outlet hole; the water outlet quantity of the water outlet hole is smaller than the water inlet quantity of the rainwater inlet in heavy rain and medium rain and is larger than or equal to the water inlet quantity of the rainwater inlet in light rain.
As a further improvement of the embodiment of the invention, the central axis of the splitter box has a preset distance with the rotating shaft in the horizontal direction; when the rainwater tank is used, when the liquid level in the diversion trench reaches a preset value, the diversion trench is unstably overturned towards one side of the rainwater tank, so that the opening is inclined downwards.
As a further improvement of the embodiment of the invention, a first baffle and a second baffle are further arranged on the side wall of the diversion trench, which is provided with the water outlet hole, a preset angle is formed between the first baffle and the side wall, and the second baffle is attached to the side wall.
As a further improvement of the embodiment of the invention, a bearing seat is arranged on the inner wall of the tank body, and the rotating shaft is rotatably connected with the bearing seat; the bearing seat is provided with a pawl, and the rotating shaft is provided with a ratchet wheel.
As a further improvement of the embodiment of the invention, a sewage inlet pipe for communicating the rainwater pool and the sewage pool is arranged on the partition wall, and a first valve is arranged on the sewage inlet pipe; a drain pipe is arranged on the wall of the rainwater pool, and a second valve is arranged on the drain pipe; and a water quality detection sensor is arranged in the rainwater tank.
As a further improvement of the embodiment of the invention, the height of the drain pipe is higher than that of the sewage inlet pipe.
As a further improvement of the embodiment of the invention, the rain pool further comprises a controller, wherein a first liquid level sensor is arranged in the rain pool, and the first valve and the second valve are both electromagnetic valves; the water quality detection sensor, the first liquid level sensor, the first valve and the second valve are all connected with the controller.
As a further improvement of the embodiment of the invention, a water pump, a sewage discharge pipe and a second liquid level sensor are arranged in the sewage pool, the sewage discharge pipe is connected with an outlet of the water pump, and the water pump and the second liquid level sensor are both connected with the controller; the starting liquid level height of the water pump is lower than the height of the sewage inlet pipe.
On the other hand, the embodiment of the invention also provides a municipal rainwater and sewage separation method, and the municipal rainwater and sewage separation method is adopted, and the method comprises the following steps:
step 10) if the rain falls, the water inflow of the rainwater inlet is less than or equal to the water outflow of the diversion trench, and the rainwater enters the diversion trench from the rainwater inlet through the opening of the diversion trench and then flows into the sewage pool through the water outlet;
if heavy rain falls in the middle or at the middle, the water inflow of the rainwater inlet is larger than the water outflow of the diversion trench, and all initial rainwater entering the diversion trench from the rainwater inlet through the opening of the diversion trench flows into the sewage pool through the water outlet; the middle-term rainwater is gathered in the diversion trench, the water amount in the diversion trench is gradually increased until the liquid level height in the diversion trench reaches a preset value, the diversion trench is turned over to one side of the rainwater pool, and all the rainwater in the diversion trench flows out of the opening and is poured into the rainwater pool; the opening is kept in a downward overturning state after the diversion trench is overturned, and later rainwater flows into the rainwater pool downwards along the side wall of the diversion trench in an inclined mode.
As a further improvement of the embodiment of the present invention, the method further includes:
step 20) initially, the first valve and the second valve are both in a closed state; the water quality detection sensor detects the water quality condition in the rainwater tank, the first liquid level sensor detects the liquid level height in the rainwater tank, and the second liquid level sensor detects the liquid level height in the sewage tank;
step 30), when the liquid level in the rainwater tank reaches the height of the sewage inlet pipe, if the water quality is detected to be not up to standard, the controller controls the first valve to be in an open state, and if the water quality is detected to be up to standard, the controller controls the first valve to be in a closed state;
in the process that the liquid level in the rainwater basin is continuously increased, once the water quality is detected to be not up to the standard, the controller controls the first valve to be in an opening state, and if the water quality is detected to be up to the standard, the controller controls the first valve to be in a closing state;
when the liquid level in the rainwater tank reaches the height of the drain pipe, if the water quality is detected to be not up to standard, the controller controls the second valve to be in a closed state, the first valve is in an open state, and if the water quality is detected to be up to standard, the controller controls the second valve to be in an open state, and the first valve is in a closed state;
when the liquid level in the rainwater pool is lower than the drain pipe, the controller controls the second valve to be in a closed state, and when the liquid level in the rainwater pool is lower than the sewage inlet pipe, the controller controls the first valve to be in a closed state;
when the liquid level in the sewage tank reaches the starting liquid level of the water pump, the controller controls the water pump to start, and when the liquid level in the sewage tank drops to the stopping liquid level of the water pump, the controller controls the water pump to stop running.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: according to the municipal rainwater and sewage flow dividing device and method provided by the embodiment of the invention, the flow dividing groove is arranged at the rainwater inlet, sewage with small rainfall and sewage with medium and large rainfall in the early stage flow into the sewage pool through the water outlet hole of the flow dividing groove, rainwater with medium and large rainfall in the middle stage is poured into the rainwater pool through the flow dividing groove in an overturning manner, and rainwater with medium and large rainfall in the later stage directly flows into the rainwater pool through the diversion of the side wall of the sewage side of the flow dividing groove, so that the sewage and rainwater can be divided under the condition of different rainfall, the rainwater and sewage mixed water with substandard water quality is prevented from being discharged into a river channel to cause pollution, and simultaneously, the rainwater and sewage mixed water with standard water quality is also prevented from being conveyed to a sewage treatment plant to waste resources of the sewage treatment plant. The municipal rainwater and sewage separating device and method provided by the embodiment of the invention utilize a mechanical structure to separate rainwater and sewage, and are simple in structure and low in cost.
Drawings
FIG. 1 is a top view of a municipal storm sewage diversion apparatus according to an embodiment of the invention;
FIG. 2 is a cross-sectional view of a municipal storm sewage diversion apparatus according to an embodiment of the invention;
FIG. 3 is a schematic view of the operation of a municipal rainwater and sewage separation device according to an embodiment of the invention;
FIG. 4 is a schematic view of one configuration of a diverter trough in an embodiment of the present invention;
fig. 5 is another schematic view of the diverter trough in an embodiment of the present invention.
The figure shows that: the sewage treatment device comprises a water pump 1, a second liquid level sensor 2, a sewage pool 3, a sewage inlet pipe 4, a first valve 5, a first liquid level sensor 6, a water quality detection sensor 7, a rainwater pool 8, a second valve 10, a drain pipe 11, a controller 12, a diversion trench 13, a sewage side 131, a water outlet hole 132, a central axis 133, a rotating shaft 134, an opening 135, a pawl 136, a ratchet wheel 137, a bearing seat 138 and a rainwater inlet 14.
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 rainwater and sewage diversion device, which comprises a pool body, a cover plate, a partition wall and a diversion channel 13 with an opening 135, wherein the cover plate is arranged at the top end of the pool body, and a rainwater inlet 14 communicated with an inner cavity of the pool body is formed in the cover plate, as shown in figures 1 and 2. The partition wall sets up in the cell body, separates the cell body for rainwater pond 8 and effluent water sump 3, and the water in the rainwater pond 8 can directly discharge in the river course, and sewage treatment plant is carried to the water in the effluent water sump 3. The diversion channel 13 is rotatably connected with the inner wall of the tank body through a rotating shaft 134, and the diversion channel 13 is positioned between the top end of the partition wall and the rainwater inlet 14. One side of the diversion channel 13 is a sewage side 131, and a water outlet hole 132 is arranged on the side wall of the sewage side 131. The water outlet amount of the water outlet hole 132 is smaller than the water inlet amount of the rainwater inlet 14 in heavy rain and medium rain, and is equal to or larger than the water inlet amount of the rainwater inlet 14 in light rain. According to the weather division standard, light rain means that the rainfall is below 0.1-10.0 mm within 24 hours, and medium rain means that the rainfall is more than 10.0 mm within 24 hours. In the initial state, the opening of the diversion channel 13 is opposite to the rainwater inlet 14, and the sewage side 131 of the diversion channel 13 is located above the sewage tank 3.
When the municipal rainwater and sewage separating device of the embodiment is used, rainwater firstly enters the separating channel 13 through the rainwater inlet 14. If the rain falls, the rain water washes the ground, and the water is always the sewage. Because the water outlet amount of the diversion channel 13 is larger than or equal to the water inlet amount of the rainwater inlet 14, the sewage enters the diversion channel 13 and then flows into the sewage tank 3 from the water outlet hole 132. If the rain falls in the middle and large areas, the rain water at the early stage is flushed through the ground and is sewage, and the rain water at the middle and later stages is clean rain water. Since the water outlet amount of the diversion channel 13 is smaller than the water inlet amount of the rainwater inlet 14, the initial sewage entering the diversion channel 13 enters the diversion channel 13 and then flows into the sewage tank 3 from the water outlet hole 132. Meanwhile, the middle-term clean rainwater enters the diversion trench 13 and then gathers in the diversion trench 13, the water amount in the diversion trench 13 gradually increases, when the liquid level in the diversion trench 13 rises to a set value, the diversion trench 13 turns over to one side of the rainwater tank 8 around the rotating shaft 134, as shown in fig. 3, so that the opening 135 is inclined downwards, and all rainwater in the diversion trench 13 flows into the rainwater tank 8 from the opening. The diversion channel 13 is kept in an opening downward-turning state under the impact of rainwater flowing in from the rainwater inlet 14 after turning over, so that clean rainwater in later period can flow into the rainwater tank 8 along the side wall of the sewage side 131 of the diversion channel 13 in an inclined manner.
According to the municipal rainwater and sewage flow dividing device provided by the embodiment of the invention, the flow dividing groove 13 is arranged at the rainwater inlet 14, sewage with small rainfall and sewage with medium and large rainfall in the early stage flow into the sewage pool 3 through the water outlet 132 of the flow dividing groove, rainwater with medium and large rainfall in the middle stage flows into the rainwater pool 8 through the flow dividing groove 13 in an overturning manner, and rainwater with medium and large rainfall in the later stage directly flows into the rainwater pool 8 through the diversion of the side wall of the sewage side of the flow dividing groove 13, so that the sewage and rainwater can be divided under the condition of different rainfall, the rainwater and sewage mixed water with substandard water quality is prevented from being discharged into a river channel to cause pollution, and simultaneously, the rainwater and sewage mixed water with standard water quality is prevented from being conveyed to a sewage treatment plant to waste resources of the sewage treatment plant. The municipal rainwater and sewage separating device provided by the embodiment of the invention utilizes a mechanical structure to separate rainwater and sewage, and has the advantages of simple structure and low cost.
Preferably, as shown in fig. 4, the longitudinal section of the dividing channel 13 is U-shaped, and the central axis 133 of the dividing channel 13 is at a predetermined distance from the rotating shaft 134 in the horizontal direction, so that the dividing channel 13 has an eccentric structure. The preset distance is set according to the volume and the section size of the splitter box 13, the total sectional area of the water outlet holes and the like. When the rainwater collecting device is used, when the water amount in the diversion trench 13 reaches a preset water amount value, the diversion trench 13 unstably turns over towards one side of the rainwater pool 8 around the rotating shaft 134, so that the opening is inclined downwards. When no water exists in the diversion channel 13 and the external force action is lost, the diversion channel rotates in the opposite direction under the action of the eccentric moment to return to the initial state, and the opening is upward. This embodiment utilizes eccentric structure, and the middle period rainwater is stored in splitter box 13 when the rainfall is middle and large, and when the liquid level height in splitter box 13 reached the default, automatic to 8 side upsets in the rainwater pond, pours the rainwater in splitter box 13 into rainwater pond 8 in, need not to add actuating mechanism, simple structure.
Preferably, the side wall 131 of the diversion trench 13, which is provided with the water outlet hole 132, is further provided with a first baffle and a second baffle, a preset angle is formed between the first baffle and the side wall 131 of the diversion trench 13, and the second baffle is attached to the side wall 131 of the diversion trench 13. After the diversion trench 13 is turned over to incline the opening downwards, rainwater flowing into the rainwater inlet 14 impacts the second baffle plate on the diversion trench 13, and rainwater flows into the rainwater tank 8 after being gathered on the second baffle plate, so that the downward impact force of the rainwater on the diversion trench 13 is increased, and the diversion trench 13 keeps the opening turned downwards and cannot be restored to the initial state. The provision of the first baffle prevents rainwater from flowing into the sump 3 along the side wall of the sewage side 131 of the splitter box 13, so that clean rainwater at a later stage flows into the rainwater tank 8 all obliquely downward along the side wall of the sewage side 131 of the splitter box 13.
Preferably, as shown in fig. 5, a bearing seat 138 is disposed on the inner wall of the tank body, and the rotating shaft 134 is rotatably connected to the bearing seat 138. The bearing seat 138 is provided with a pawl 136, and the rotating shaft is provided with a ratchet wheel 137. When the liquid level in the diversion trench 13 reaches a preset value, the diversion trench 13 and the rotating shaft 134 rotate to drive the ratchet wheel 137 to rotate, when the diversion trench 13 rotates to a set angle, namely the opening of the diversion trench 13 faces downwards, rainwater in the diversion trench 13 flows into the rainwater pool 8 from the opening completely, the pawl 136 is matched with the ratchet wheel 137, the ratchet wheel 137 cannot turn over in the opposite direction, clean rainwater in the later stage flows into the rainwater pool 8 downwards along the side wall of the sewage side 131 of the diversion trench 13 in an inclined mode, and the diversion trench 13 can be reset mechanically or manually after rain stopping or before raining next time. The matched ratchet wheel 137 and the pawl 136 are arranged, so that the situation that the impact force of rainwater flowing into the rainwater inlet 14 is insufficient after the rainfall becomes small, the diversion channel 13 is reset under the action of the overturning moment, and clean rainwater flows into the sewage tank 3 can be prevented.
Preferably, a sewage inlet pipe 4 for communicating the rainwater pool 8 with the sewage pool 3 is arranged on the partition wall, and a first valve 5 is arranged on the sewage inlet pipe 4. The wall of the rain water tank 8 is provided with a drain pipe 11, and the drain pipe 11 is provided with a second valve 10. A water quality detection sensor 7 is arranged in the rain pool 8. The water quality detection sensor 7 is used for detecting the content of detection parameters such as the rainwater and sewage mixed water COD, NH3-N, MI3PO4 and the like in the rainwater pool 8. The water quality detection sensor 7 can adopt TD-408 of Beijing Tongde Chuangye science and technology Limited.
In the above embodiment, the water quality detection sensor 7 in the rainwater tank 8 is used for detecting the water quality condition in the rainwater tank 8, if the water quality reaches the standard, that is, the pollutant content is lower than the preset standard value, the first valve 5 is closed, the second valve 10 is opened, and the rain and sewage mixed water is discharged into the river channel through the drain pipe 11; if the water quality does not reach the standard, namely the pollutant content is not lower than a preset standard value, the second valve 10 is closed, the first valve 5 is opened, and the rain-sewage mixed water enters the sewage pool 3 through the sewage inlet pipe 4 and is introduced into a sewage treatment plant from the sewage pool 3. The embodiment of the invention further divides the rainwater and the sewage in the rainwater tank 8, reduces the flow of the sewage discharged to the river along with the rainwater, and ensures the water quality of the rainwater discharged to the river channel.
Preferably, the height of the bottom of the rain water tank 8 is higher than that of the bottom of the sewage tank 3. When the water quality does not reach the standard, the sewage in the rainwater tank 8 can conveniently flow into the sewage tank 3, and conditions are created for the starting liquid level of the water pump 1 to be lower than the height of the sewage inlet pipe 4 and the starting operation of the water pump 1.
Preferably, the height of the drain pipe 11 is higher than that of the soil inlet pipe 4. When the water quality detection sensor 7 detects that the water quality does not reach the standard, the second valve 10 is closed, and the first valve 5 is opened. Advance dirty pipe 4 and be less than drain pipe 11 for quality of water is not up to standard in the dirty mixed water of rain in time gets into effluent water sump 3 through advancing dirty pipe 4, effectively prevents to make the dirty mixed water of rain that quality of water is not up to standard discharge the river course from drain pipe 11 because of operating the valve is not timely.
Preferably, the municipal rainwater and sewage separating device of the embodiment further comprises a controller 12, the rainwater tank 8 is internally provided with a first liquid level sensor 6, and the first valve 5 and the second valve 10 are both solenoid valves. The water quality detection sensor 7, the first liquid level sensor 6, the first valve 5 and the second valve 10 are all connected with the controller 12. The first level sensor 6 is used for detecting the level of the liquid in the rain water tank 8. Wherein, the controller 12 can adopt an LSK-1JR control cabinet, and the first liquid level sensor 6 can adopt an MIK-ZP ultrasonic liquid level meter manufactured by Hangzhou Mike sensing technology Limited. The controller 12 controls the opening and closing of the first valve 5 and the second valve 10 according to the liquid level detected by the first liquid level sensor 6 and the water quality condition detected by the water quality detection sensor 7 and according to preset conditions.
Preferably, be equipped with water pump 1, blow off pipe and second level sensor 2 in the effluent water sump 3, the exit linkage of blow off pipe and water pump 3, water pump 1 and second level sensor 2 all are connected with controller 12. The starting liquid level and the stopping liquid level of the water pump 1 are preset, and the starting liquid level of the water pump 1 is higher than the stopping liquid level of the water pump 1. The second liquid level sensor 2 is used for detecting the liquid level height in the sewage pool 3, and the controller 12 controls the start and stop of the water pump 1 according to the liquid level height detected by the second liquid level sensor 2 and the start liquid level and the stop liquid level of the water pump 1. After the water pump 1 is started, sewage in the sewage tank 3 is discharged from the sewage tank 3 through the water pump 1 and a sewage discharge pipe and is introduced into a sewage treatment plant.
Preferably, the starting liquid level of the water pump 1 is lower than the height of the sewage inlet pipe 4. When the water quality does not reach the standard, sewage in the rainwater tank 8 flows into the sewage tank 3 through the sewage inlet pipe 4, if the starting liquid level of the water pump 1 is higher than the height of the sewage inlet pipe 4, the liquid level in the sewage tank 3 is higher than the sewage inlet pipe 4 at the moment, and then the sewage in the rainwater tank 8 cannot enter the sewage tank 3.
The embodiment of the invention also provides a municipal rainwater and sewage separation method, and the municipal rainwater and sewage separation device is adopted. The method comprises the following steps:
step 10) if it rains slightly, the water inflow of the rainwater inlet 14 is less than or equal to the water outflow of the diversion trench 13, and rainwater enters the diversion trench 13 from the rainwater inlet 14 through the opening of the diversion trench 13 and then flows into the sewage tank 3 through the water outlet 132.
In case of heavy rain, the inflow of rainwater inlet 14 is greater than the outflow of diversion channel 13, and all the initial rainwater entering diversion channel 13 from rainwater inlet 14 through the opening of diversion channel 13 flows into wastewater tank 3 through outlet 132. In the middle period, rainwater is gathered in the diversion trench 13, the water amount in the diversion trench 13 is gradually increased until a preset water amount value is reached, the diversion trench 13 is overturned towards one side of the rainwater pool 8 around the rotating shaft 134, and all rainwater in the diversion trench 13 flows out of the opening and is poured into the rainwater pool 8.
If the rainwater amount flowing into the rainwater inlet 14 is large, the impact force of the rainwater inlet 14 is larger than the overturning moment of the diversion channel 13, the diversion channel 13 keeps the opening downwards overturning state under the impact of the rainwater flowing into the rainwater inlet 14 after overturning, and the rainwater at the later stage all obliquely flows into the rainwater pool 8 downwards along the side wall of the diversion channel 13.
In order to prevent the rainfall from becoming small, the impact of the amount of rainfall flowing into the rainwater inlet 14 cannot be kept larger than the turning moment of the distribution chute 13. In a first preferred method, the sidewall 131 of the diversion trench 13, which is provided with the water outlet hole 132, is provided with a second baffle, and the second baffle is attached to the sidewall 131 and does not block the water outlet hole 132. After the diversion trench 13 is turned over to enable the opening to incline downwards, rainwater flowing into the rainwater inlet 14 impacts a second baffle on the diversion trench 13, and rainwater flows into the rainwater pool 8 after being gathered on the second baffle, so that the downward impact force of the rainwater on the diversion trench 13 is increased, the diversion trench 13 cannot reset and always keeps the opening inclined downwards, and rainwater in the later period all flows into the rainwater pool 8 downwards along the side wall of the diversion trench 13 in an inclined mode.
In a second preferred method, a bearing seat 138 is arranged on the inner wall of the tank body, and the rotating shaft 134 is rotatably connected with the bearing seat 138. The bearing seat 138 is provided with a pawl 136, and the rotating shaft is provided with a ratchet wheel 137. When the splitter box 13 overturns, the ratchet wheel 137 rotates along with the rotating shaft 134, the pawl 136 does not rotate along with the rotating shaft 134, when the splitter box 13 rotates to a set angle, the pawl 136 is matched with the ratchet wheel 137 at a new position, at the moment, the splitter box 13 cannot reset under the action of overturning moment, and later rainwater flows downwards into the rainwater basin 8 along the side wall of the splitter box 13 in an inclined mode. Before the second rain water comes, the diversion channel 13 is reset mechanically or manually.
According to the method provided by the embodiment of the invention, the diversion channel 13 is arranged at the rainwater inlet 14, sewage with small rainfall and sewage with medium and large rainfall in the early stage flow into the sewage pool 3 through the water outlet 132 of the diversion channel, rainwater with medium and large rainfall in the middle stage is poured into the rainwater pool 8 through the diversion channel in the middle and large rainfall in the middle and middle stage, and rainwater with medium and large rainfall in the later stage directly flows into the rainwater pool 8 through diversion of the side wall of the sewage side of the diversion channel 13, so that sewage and rainwater can be diverted under the condition of different rainfall, pollution caused by discharging rainwater and sewage mixed water with substandard water quality into a river channel is avoided, and simultaneously, the rainwater and sewage mixed water with standard water quality is also prevented from being conveyed to a sewage treatment plant to waste resources of the sewage treatment plant. According to the municipal rainwater and sewage flow dividing method provided by the embodiment of the invention, a mechanical structure is used for rainwater and sewage flow dividing, the flow dividing effect is good, the flow of sewage discharged into a river along with rainwater is reduced, and the problem of pollution to the water quality of the river when rainwater and sewage are discharged in a combined manner is effectively solved.
Preferably, the method according to the embodiment of the present invention further includes:
step 20) initially, both the first valve 5 and the second valve 10 are in a closed state. The water quality detection sensor 7 detects the water quality condition in the rainwater pool 8, the first liquid level sensor 6 detects the liquid level height in the rainwater pool 8, and the second liquid level sensor 2 detects the liquid level height in the sewage pool 3.
Step 30), when the liquid level in the rainwater tank 8 reaches the height of the sewage inlet pipe 4, if the water quality is detected to be not up to the standard, the controller 12 controls the first valve 5 to be in an opening state; if the water quality is detected to reach the standard, the controller 12 controls the first valve 5 to be in a closed state.
In the process that the liquid level in the rainwater tank 8 is continuously increased, once the water quality is detected to be not up to the standard, the controller 12 controls the first valve 5 to be in an opening state; if the water quality is detected to reach the standard, the controller 12 controls the first valve 5 to be in a closed state.
When the liquid level in the rainwater tank 8 reaches the height of the drain pipe 11, if the water quality is detected to be not up to the standard, the controller 12 controls the second valve 10 to be in a closed state, and the first valve 5 is in an open state; if the water quality is detected to reach the standard, the controller 12 controls the second valve 10 to be in an opening state, and the first valve 5 to be in a closing state.
When the liquid level in the rain water tank 8 is lower than the drain pipe 11, the controller 12 controls the second valve 10 to close, and when the liquid level in the rain water tank 8 is lower than the sewage inlet pipe 4, the controller 12 controls the first valve 5 to close.
When the liquid level in the sewage tank 3 reaches the starting liquid level of the water pump 1, the controller 12 controls the water pump 1 to start, and when the liquid level in the sewage tank 3 drops to the stopping liquid level of the water pump 1, the controller 12 controls the water pump 1 to stop running.
In the method of the embodiment, the water quality condition in the collecting tank 8 is detected by the water quality detection sensor 7, if the water quality reaches the standard, namely the pollutant content is lower than the preset standard value, the first valve 5 is closed, the second valve 10 is opened, and the rainwater is discharged into the river channel through the drain pipe 11. If the water quality does not reach the standard, namely the pollutant content is not lower than a preset standard value, the second valve 10 is closed, the first valve 5 is opened, and the rain-sewage mixed water enters the sewage pool 3 through the sewage inlet pipe 4 and is introduced into a sewage treatment plant from the sewage pool 3. In the method of the embodiment, the rainwater in the rainwater tank 8 is further divided according to the water quality condition, so that the flow of the sewage discharged to the river along with the rainwater is reduced, and the water quality of the rainwater discharged to the river channel is ensured.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (10)
1. A municipal administration rain and sewage diverging device is characterized by comprising a pool body, a cover plate, a partition wall and a diverging channel (13) with an opening, wherein the cover plate is arranged at the top end of the pool body, and the cover plate is provided with a rainwater inlet (14) communicated with the inner cavity of the pool body; the partition wall is arranged in the tank body and divides the tank body into a rainwater tank (8) and a sewage tank (3); the diversion trench (13) is rotationally connected with the inner wall of the tank body through a rotating shaft (134), and the diversion trench (13) is positioned between the top end of the partition wall and the rainwater inlet (14); the opening of the diversion trench (13) is opposite to the rainwater inlet (14), and a water outlet hole (132) is formed in the side wall (131) of the diversion trench (13) on one side of the sewage pool (3); the water outlet quantity of the water outlet hole (132) is smaller than the water inlet quantity of the rainwater inlet (14) when raining in the middle or large area and is larger than or equal to the water inlet quantity of the rainwater inlet (14) when raining in the small area.
2. The municipal rainwater and sewage flow distribution device according to claim 1, wherein the central axis of the distribution chute (13) is at a predetermined distance from the rotating shaft (134) in the horizontal direction; when the rainwater tank is used, when the liquid level in the diversion trench (13) reaches a preset value, the diversion trench (13) unstably turns over towards one side of the rainwater tank (8), so that the opening is inclined downwards.
3. The municipal rainwater and sewage flow distribution device according to claim 1, wherein the side wall (131) of the distribution chute (13) having the water outlet hole (132) is further provided with a first baffle and a second baffle, the first baffle and the side wall (131) have a predetermined angle therebetween, and the second baffle is attached to the side wall (131).
4. The municipal rainwater and sewage flow distribution device according to claim 1, wherein the inner wall of the tank body is provided with a bearing seat (138), and the rotating shaft (134) is rotatably connected with the bearing seat (138); and a pawl (136) is arranged on the bearing seat (138), and a ratchet wheel (137) is arranged on the rotating shaft (134).
5. The municipal rainwater and sewage flow distribution device according to claim 1, wherein the partition wall is provided with a sewage inlet pipe (4) for communicating the rainwater tank (8) with the sewage tank (3), and the sewage inlet pipe (4) is provided with a first valve (5); a drain pipe (11) is arranged on the wall of the rainwater pool (8), and a second valve (10) is arranged on the drain pipe (11); and a water quality detection sensor (7) is arranged in the rainwater tank (8).
6. The municipal rainwater and sewage flow dividing device according to claim 5, wherein the drain pipe (11) is higher than the sewage inlet pipe (4).
7. The municipal rainwater and sewage flow distribution device according to claim 5, further comprising a controller (12), wherein the rainwater tank (8) is provided with a first liquid level sensor (6), and the first valve (5) and the second valve (10) are both solenoid valves; the water quality detection sensor (7), the first liquid level sensor (6), the first valve (5) and the second valve (10) are all connected with the controller (12).
8. The municipal rainwater and sewage flow distribution device according to claim 7, wherein a water pump (1), a sewage discharge pipe and a second level sensor (2) are arranged in the sewage tank (3), the sewage discharge pipe is connected with an outlet of the water pump (3), and the water pump (1) and the second level sensor (2) are both connected with the controller (12); the starting liquid level of the water pump (1) is lower than the height of the sewage inlet pipe (4).
9. A municipal rainwater and sewage separation method, wherein the municipal rainwater and sewage separation device according to any one of claims 1 to 8 is used, and the method comprises the following steps:
step 10), if the rain falls, the water inflow of the rainwater inlet (14) is less than or equal to the water outflow of the diversion trench (13), and the rainwater enters the diversion trench (13) from the rainwater inlet (14) through the opening of the diversion trench (13) and then flows into the sewage tank (3) through the water outlet (132);
if rain falls, the water inflow of the rainwater inlet (14) is larger than the water outflow of the diversion channel (13), and all initial rainwater entering the diversion channel (13) from the rainwater inlet (14) through the opening of the diversion channel (13) flows into the sewage pool (3) through the water outlet holes (132); middle-term rainwater is gathered in the diversion trench (13), the water amount in the diversion trench (13) is gradually increased until the liquid level height in the diversion trench reaches a preset value, the diversion trench (13) is turned over to one side of the rainwater pool (8), and all rainwater in the diversion trench (13) flows out of the opening and is poured into the rainwater pool (8); the opening is kept in a downward overturning state after the diversion trench (13) is overturned, and rainwater in the later period all flows into the rainwater pool (8) downwards along the side wall of the diversion trench (13) in an inclined mode.
10. The municipal rain sewage flow method of claim 9, further comprising:
step 20), initially, the first valve (5) and the second valve (10) are both in a closed state; the water quality detection sensor (7) detects the water quality condition in the rainwater pool (8), the first liquid level sensor (6) detects the liquid level height in the rainwater pool (8), and the second liquid level sensor (2) detects the liquid level height in the sewage pool (3);
step 30), when the liquid level in the rainwater tank (8) reaches the height of the sewage inlet pipe (4), if the water quality is detected to be not up to standard, the controller (12) controls the first valve (5) to be in an open state, and if the water quality is detected to be up to standard, the controller (12) controls the first valve (5) to be in a closed state;
in the process that the liquid level in the rainwater pool (8) is continuously increased, once the water quality is detected to be not up to standard, the controller (12) controls the first valve (5) to be in an opening state, and if the water quality is detected to be up to standard, the controller (12) controls the first valve (5) to be in a closing state;
when the liquid level in the rainwater tank (8) reaches the height of the drain pipe (11), if the water quality is detected to be not up to standard, the controller (12) controls the second valve (10) to be in a closed state, the first valve (5) is in an open state, and if the water quality is detected to be up to standard, the controller (12) controls the second valve (10) to be in the open state, and the first valve (5) is in the closed state;
when the liquid level in the rainwater tank (8) is lower than the drain pipe (11), the controller (12) controls the second valve (10) to be in a closed state, and when the liquid level in the rainwater tank (8) is lower than the sewage inlet pipe (4), the controller (12) controls the first valve (5) to be in a closed state;
when the liquid level in the sewage pool (3) reaches the starting liquid level of the water pump (1), the controller (12) controls the water pump (1) to start, and when the liquid level in the sewage pool (3) drops to the stopping liquid level of the water pump (1), the controller (12) controls the water pump (1) to stop running.
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