Municipal rain processing system
Technical field
The present invention relates to municipal plumbing field, more particularly, to a kind of municipal rain processing system and its rainwater treatment side
Method.
Background technology
With adding for the continuous investment construction of urban environment infrastructure, the constantly improve of operating mechanism and sewage plant construction
It hurry up, municipal sewage retention processing ratio improves constantly, and point-source pollution is substantially achieved effective control.Non-point pollution turns into water quality
One of the main reason for deterioration, urban water system is constituted a serious threat.
Rainwater runoff pollution belongs to non-point pollution, and the dirts such as substantial amounts of organic matter, nitrogen, phosphorus are carried in early-stage rainwater runoff
Thing is contaminated, turns into the direct threat of urban water-body.Due to rainfall initial stage, rainwater has dissolved a large amount of sour gas, automobile in air
The pollution gas such as tail gas, plant gas, land ground after, and due to wash away asphalt felt roofing, asphalt concrete road,
Construction site etc. so that contain the polluters such as substantial amounts of organic matter, heavy metal, grease, suspended solid in early-stage rainwater.
Therefore the pollution level of early-stage rainwater is higher, has been usually more than the pollution level of common municipal sewage.Especially
The Initial Runoff that rainfall is formed contains a large amount of pollutants, and these pollutants are mainly derived from atmospheric sedimentation, ground refuse accumulation, car
Discharge and ground wash away erosion.Entrained pollutant is nearly all concentrated in several millimeters of rainwater in the early stage in rainfall runoff,
Its pollutional load is far above middle and later periods rainwater, if this part runoff directly discharges, impacting property of urban water-body can be influenceed,
The serious thorough improvement for restricting urban water environmental quality.
Early-stage rainwater carries a large amount of pollutants, easily causes serious pollution if being directly discharged into water body, therefore by early-stage rainwater
Retain and be discharged into sewer system, discharged again after sewage treatment plant is handled, be the effective way for reducing water pollution.Although
The early-stage rainwater period is not grown, but run-off is larger, and early-stage rainwater is instantaneously all diverted into sewage network, not only increased substantially
The investment of sewer system, and extraordinary water load impact can be brought to sewage treatment plant, influence its treatment effect.
In the prior art, 201110085310.4 patent of invention, the river by being arranged on catch-basin pour in down a chimney retardance weir
Early-stage rainwater is stored in collection pipe and catch-basin, pours in down a chimney the retardance default height in weir when the early-stage rainwater water surface reaches river
When, early-stage rainwater is drawn into by sedimentation basin by pumping plant, after sedimentation of the early-stage rainwater in sedimentation basin, early-stage rainwater is settled into shape
Into supernatant be discharged into river course, settlement section is discharged into municipal wastewater webmaster.The invention can make full use of existing rainwater treatment system
System, realizes and early-stage rainwater and later stage rainwater is handled differently, can effectively prevent pollution of the early-stage rainwater to environment.
But also there is following deficiency for above-mentioned technical proposal:On the one hand, after rainfall terminates, collection pipe and catch-basin
In also there is later stage rainwater, it is necessary to by sedimentation basin primary emission into municipal wastewater pipeline, can so increase municipal wastewater
The processing load of pipeline, influences its treatment effect;On the other hand, after a rainfall terminates, if short-term such as couple of days it
Inside rainfall again, because rainfall interval is shorter, the runoff pollution of its early-stage rainwater is relatively small, it is necessary to be discharged into sewer system
The early-stage rainwater amount of processing is also relatively small, but can not be adjusted in this case in above-mentioned technical proposal.
The content of the invention
The invention provides a kind of municipal rain processing system and its rainwater treatment method, the upper of prior art can be overcome
Defect is stated, the amount of rainfall for rain fall regulation into sewer system, load is handled so as to reduce it.
As one aspect of the present invention, there is provided a kind of municipal rain processing system, including:Collection pipe, for collecting
Rainwater;Catch-basin, it is connected with the collection pipe, and it has specific volume, can store the rain for the specified quantitative that collection pipe collects
Water;The catch-basin is connected by rainwater dredging pipe with river course;River pours in down a chimney retardance weir, and it is arranged in catch-basin;Sedimentation basin,
Deposited for rainwater therein will to be entered, post-depositional rainwater can be discharged into river course or municipal sewage pipe network;Pumping plant, use
It is drawn into by rainwater from catch-basin in sedimentation basin;The catch-basin is exported with being connected between the pumping plant by two, its
Middle first outlet is arranged at the bottom of the catch-basin, and second outlet is arranged at the catch-basin half capacity water level, passed through
Control device can control the unlatching and closing of the first outlet and second outlet.
Preferably, the sedimentation basin includes the first discharge outlet and the second discharge outlet, and first discharge outlet is located at sedimentation basin
Bottom, communicated with municipal wastewater pipeline;Second discharge outlet is located at the specific water level of sedimentation basin, is communicated with river course.
Preferably, early-stage rainwater is detained in sedimentation basin after the ticket reserving time settled, and will settle the early-stage rainwater formed
Supernatant is discharged into river course by the second discharge outlet, and settlement section is discharged into municipal sewage pipe network by the first discharge outlet.
Preferably, in addition to water-level gauge, it is used to measure the deposition pool water level.
Preferably, after rainfall terminates, when it is zero that the water-level gauge, which measures the deposition pool water level, the control device
The first outlet is controlled to close, the second outlet is opened;Rain is pumped into heavy by pumping plant after half in the catch-basin
Pond is accumulated, then the first discharge outlet of sedimentation basin is discharged into municipal wastewater pipeline.
Preferably, the sedimentation basin also includes the 3rd delivery port, and the 3rd delivery port is located at sedimentation basin bottom, and described
River course communicates.
Preferably, the special time is the specified number of days more than 3 days.
Preferably, after rain is discharged into municipal wastewater pipeline by sedimentation basin after the half in the catch-basin, if greater than spy
Fix time no rainfall, the control device closes second outlet, opens first outlet;By the remaining rainwater in the catch-basin
Sedimentation basin is pumped into by pumping plant, river course is then discharged into by the 3rd delivery port.
As another aspect of the present invention, there is provided the rainwater treatment method of above-mentioned municipal rain processing system, bag
Include following steps:A) first rain collection step:In predetermined first rain period, pour in down a chimney retardance weir using river and be stored in early-stage rainwater
In collection pipe and catch-basin;B) first rain transfer step:Within the predetermined time, collection pipe and catch-basin will be stored in using water pump
In early-stage rainwater pump into sedimentation basin;C) just rain sedimentation and drain steps:When early-stage rainwater is detained reservation in sedimentation basin
Between settled after, by settle formed early-stage rainwater supernatant be discharged into river course, settlement section is discharged into municipal sewage pipe network;d)Drop
After rain terminates, when it is zero that the water-level gauge, which measures the deposition pool water level, the control device controls the first outlet
Closing, the second outlet are opened;Half rainwater in the catch-basin is pumped into sedimentation basin by pumping plant, then drains into municipal administration
Sewage conduct;e)After rainfall terminates, if the rainfall again in special time, repeat step a) arrives e);If greater than specific
Time does not have rainfall, into step f);f)The control device closes second outlet, opens first outlet;By the catch-basin
In remaining rainwater sedimentation basin is pumped into by pumping plant, then drain into river course.
Brief description of the drawings
Fig. 1 is the system schematic of the municipal rain processing system of the present invention.
Fig. 2 is the rainwater treatment flow chart of the municipal rain processing system of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, implement below in conjunction with the present invention
Accompanying drawing in example, the technical scheme in the embodiment of the present invention is clearly and completely described.
The municipal rain processing system of the embodiment of the present invention, including collection pipe 1, catch-basin 2, river pour in down a chimney retardance weir 3, rain
Water dredging pipe 4, pumping plant 5 and sedimentation basin 6.Collection pipe 1 is in communication with the outside, for converging and storing rainwater.Catch-basin 2 is with converging
Water pipe 1 connects, and it has specific volume, can store the rainwater for the specified quantitative that collection pipe 1 collects.River pours in down a chimney retardance weir 3 and set
It is placed in catch-basin 2, its one side prevents river from pouring in down a chimney, and catch-basin 2 is had certain rainwater amount of storage, so as to
At rainfall initial stage, early-stage rainwater can be converged in collection pipe 1 and catch-basin 2;Water level reaches river and fallen in catch-basin 2
After filling retardance weir 3, rainwater can be imported into river course by rainwater dredging pipe 4.
Elevator pump is provided with pumping plant 5, for the rainwater in rainwater storage tube 1 and catch-basin 2 to be transported into sedimentation basin 6
In.Catch-basin 2 between two outlets 9 and 10 and pumping plant 5 respectively by connecting.Wherein first outlet 9 is arranged at the bottom of catch-basin 2
Portion, second outlet 10 are arranged at catch-basin half capacity water level, and control device can control first to go out by valve 11 and 12
The unlatching and closing of mouth 9 and second outlet 10.When first outlet 9 is opened, and second outlet 10 is closed, carrying in pumping plant 5
Pump is risen rainwater all in catch-basin 2 can be transported in sedimentation basin 6 by first outlet 9.When first outlet 9 is closed,
When two outlets 10 are opened, the elevator pump in pumping plant 5 can be conveyed the rainwater of half water level in catch-basin 2 by second outlet 10
Into sedimentation basin 6.
Sedimentation basin 6 is used to be deposited into rainwater therein, and post-depositional rainwater can be discharged into river course or municipal administration is dirty
Grid.Sedimentation basin 6 is provided with the first discharge outlet 61, the second discharge outlet 62 and the 3rd discharge outlet 63.First discharge outlet 61
In the bottom of sedimentation basin 6, communicated with municipal wastewater pipeline, for the settlement section of early-stage rainwater to be discharged into municipal sewage pipe network.The
Two discharge outlet 62 are located at 6 specific water level of sedimentation basin, are communicated with river course, are discharged into for will settle the early-stage rainwater supernatant formed
River course.3rd discharge outlet 63 is arranged at the bottom of sedimentation basin 6, is communicated with river course, for by the remainder of 2 middle and later periods of catch-basin rainwater
Divide and be discharged into river course.The first discharge outlet 61, the second discharge outlet 62 and the 3rd discharge outlet can be controlled respectively by different valves
63 unlatching and closing.Water-level gauge can also be set in sedimentation basin 6, for measuring the water level of sedimentation basin 6, so as to control device
Can be according to the opening and closing of the first outlet 9 and second outlet 10 of the water level control catch-basin 2 of sedimentation basin 6.
The rainwater treatment method of the embodiment of the present invention, comprises the following steps:
A) first rain collection step:In predetermined first rain period, pour in down a chimney retardance weir using river and early-stage rainwater is stored in remittance
In water pipe 1 and catch-basin 2;
B) first rain transfer step:Within the predetermined time, will be stored in using water pump first in collection pipe 1 and catch-basin 2
Phase rainwater is pumped into sedimentation basin 6;
C) just rain sedimentation and drain steps:Early-stage rainwater is detained in sedimentation basin 6 after the ticket reserving time settled, and will settle
The early-stage rainwater supernatant of formation is discharged into river course by the second discharge outlet 62, and settlement section is discharged into municipal administration by the first discharge outlet 61
Sewage network;
d)After rainfall terminates, when it is zero that water-level gauge, which measures the water level of sedimentation basin 6, represent that early-stage rainwater has racked up
Finish.Now, because collection pipe 1 and catch-basin 2 also have the later stage rainwater of residual, the first of control device control catch-basin 2 goes out
Mouth 9 is closed, and second outlet 10 is opened;Then the rainwater of the half water level in catch-basin 2 is pumped into by pumping plant by pumping plant
Sedimentation basin 6, after the part rainwater washes away to sedimentation basin 6, municipal sewage pipe network is discharged into by the first discharge outlet 61;
e)After rainfall terminates, if the rainfall again in special time such as 3 days, repeat step a) arrives e), due to this
When early-stage rainwater runoff pollution it is relatively low, and the rear rain of the last time rainfall of half in catch-basin 2 also be present, therefore the water of catch-basin 2
Position can quickly reach the height that river pours in down a chimney retardance weir 3, so as to which rainwater quickly is imported into river course;If greater than it is specific when
Between there is no rainfall within such as 3 days, into step f);
f)Control device closes the second outlet 10 of catch-basin 2, opens first outlet 9;By rain after the residue in catch-basin 2
Sedimentation basin 6 is pumped into by pumping plant 5, due to rear rain less pollution, and sedimentation basin 6 had been washed, and rain can behind the part
To be directly discharged into river course by the 3rd delivery port of sedimentation basin 6.
Above by reference to the preferred embodiments of the present invention have been illustrated, those skilled in the art do not depart from the scope of the present invention
And essence, there can be a variety of flexible programs to realize the present invention.For example, as the shown partially of one embodiment or description
Feature can be used for another embodiment to obtain another embodiment.Preferably feasible embodiment of the invention is these are only, not
Therefore limit to the interest field of the present invention, all equivalence changes made with description of the invention and accompanying drawing content, be both contained in
Within the interest field of the present invention.