CN108298708B - Integrated integrated initial rainwater in-situ treatment device and method - Google Patents

Integrated integrated initial rainwater in-situ treatment device and method Download PDF

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Publication number
CN108298708B
CN108298708B CN201810113779.6A CN201810113779A CN108298708B CN 108298708 B CN108298708 B CN 108298708B CN 201810113779 A CN201810113779 A CN 201810113779A CN 108298708 B CN108298708 B CN 108298708B
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area
layer
rainwater
cyclone
initial rainwater
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CN108298708A (en
Inventor
刘建伟
徐嵩
田洪钰
陈雪威
高柳堂
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/38Treatment of water, waste water, or sewage by centrifugal separation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/001Runoff or storm water

Abstract

The invention discloses an integrated initial rainwater in-situ treatment device and method, wherein the device comprises: the device comprises a water collecting area, a cyclone settling area and a multi-stage filtering area, wherein the cyclone settling area and the multi-stage filtering area are sequentially arranged outside the water collecting area; the water collecting area, the cyclone settling area and the multistage filtering area are sequentially arranged from high to low; a detachable sand retention layer is arranged on the inner wall of the rotational flow settling zone; the water collecting area is connected with the sand retention layer through a cyclone pipe; the cyclone settling area is communicated with the multistage filtering area through overflow holes, the water collecting area, the cyclone settling area and the multistage filtering area are concentrated into one device, the occupied area is small, substances such as SS, N, P and heavy metals in initial rainwater are effectively removed through cyclone settling of the cyclone settling area and multistage filtering of the multistage multi-filtering area, and the treatment effect is good.

Description

Integrated integrated initial rainwater in-situ treatment device and method
Technical Field
The invention relates to the technical field of initial rainwater treatment, in particular to an integrated initial rainwater in-situ treatment device and method.
Background
Along with the aggravation of urban atmospheric pollution and ground pollution, the pollution of rainwater runoff is more serious, especially initial rainwater with a scouring function. The initial rain water is rain water at the initial stage of rainfall. In the early stage of rainfall, a large amount of acid gases, automobile exhaust, factory waste gas and other pollutant gases in the air are dissolved in the rainwater, and after the rainwater falls to the ground, the rainwater washes an asphalt felt roof, an asphalt concrete road, a construction site and the like, so that the rainwater in the early stage contains a large amount of pollutants such as organic matters, pathogens, heavy metals, grease, suspended solids and the like. Therefore, the pollution level of the initial rainwater is higher, and usually exceeds the pollution level of the common urban sewage. It has the characteristics of high pollution load, non-continuity and the like. If the initial rainwater is directly discharged into the natural bearing water body, the water body is seriously polluted. Therefore, a treatment technique with simple operation, good effect and low cost is urgently needed to treat the initial rainwater.
At present, the collection and treatment of initial rainwater in China are still in a primary stage, the treatment and reuse of the initial rainwater are less considered, most of the initial rainwater is directly discharged into a sewage pipe network through a rainwater well, and a large load is brought to a sewage plant; or directly discharged without treatment, which aggravates the pollution of rivers and lakes. At present, devices for treating initial rainwater are also developed in China, but the devices generally have the defects of large occupied area, complex process, poor effect, easiness in blockage, inconvenience in loading and unloading, high cost and the like.
Therefore, how to provide an initial rainwater treatment device and method with small floor area and good treatment effect is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides an integrated initial rainwater in-situ treatment device and method, the water collection area, the cyclone settling area and the multi-stage filtration area are integrated into one device, the occupied area is small, substances such as SS, N, P and heavy metals in initial rainwater are effectively removed through cyclone precipitation in the cyclone settling area and multi-stage filtration in the multi-stage multi-filtration area, and the treatment effect is good.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated initial rainwater in-situ treatment device comprises: the device comprises a water collecting area, a cyclone settling area and a multi-stage filtering area, wherein the cyclone settling area and the multi-stage filtering area are sequentially arranged outside the water collecting area; the water collecting area, the cyclone settling area and the multistage filtering area are sequentially arranged in a ladder shape from high to low;
a detachable sand retention layer is arranged on the inner wall of the rotational flow settling zone; the water collecting area is connected with the sand retention layer through a cyclone pipe; the cyclone settling zone is communicated with the multistage filtering zone through overflow holes; wherein, the stagnant sand layer is fixed inside the cyclone settling zone through the couple.
Preferably, the top of the water collecting area is provided with a rainwater grate.
Preferably, the cyclone tube is obliquely arranged and is tangentially connected to the sand stagnation layer, wherein the inclination angle of the cyclone tube is 25-35 degrees, and the thickness of the sand stagnation layer is 45-55 mm.
Preferably, a first inspection cover is arranged at the top of the cyclone settling zone; and the bottom of the cyclone settling zone is funnel-shaped, and the inclination angle of the cyclone settling zone is 40-50 degrees.
Preferably, a second inspection cover is arranged at the top of the multistage filtering area; the multistage filtering zone is internally provided with a water distribution plate, a ceramsite layer, a zeolite layer, a coconut shell activated carbon layer and a quartz sand layer from top to bottom in sequence; and the two adjacent layers of the ceramic particle layer), the zeolite layer, the coconut shell activated carbon layer and the quartz sand layer are separated by a supporting plate; the bottom of the multistage filtering area is designed to be a slope, the inclination angle of the slope is 12-18 degrees, and a water outlet pipe is arranged at the bottom of the multistage filtering area.
Preferably, the thickness ratio of the ceramic particle layer, the zeolite layer, the coconut shell activated carbon layer and the quartz sand layer is 3:3:4: 4.
Preferably, the thickness of the ceramsite layer is 15cm, the particle size of the selected ceramsite is 15-20 mm, and the stacking density is 0.3-0.5 g/ml;
the thickness of the zeolite layer is 15cm, the particle size of the selected zeolite is 10-15 mm, and the bulk density is 1.1-1.3 g/ml;
the thickness of the coconut shell activated carbon layer is 20cm, the particle size of the selected coconut shell activated carbon is 6-8 mm, and the bulk density is 0.45-0.55 g/ml;
the thickness of the quartz sand layer is 20cm, the particle size of the selected quartz is 2-4 mm, and the bulk density is 1.8-2 g/ml.
Preferably, the water distribution plate is a PVC plate which is 5-10 mm thick and subjected to antiseptic treatment, and water distribution holes with the diameter of 5-10 mm are formed in the water distribution plate.
Preferably, the bearing plate is a PVC plate which is 5-10 mm thick and subjected to antiseptic treatment, and the bearing plate is provided with water permeable holes with the diameter of 5-10 mm.
An integrated in-situ treatment method for initial rainwater, comprising the following steps:
step 1: rainwater collection
The initial rainwater is converged into the water collecting area under the action of gravity, and suspended matters in the rainwater are prevented from entering the water collecting area by using the rainwater grate when the rainwater is converged;
step 2: rotational flow sedimentation of rainwater
Rainwater in the water collecting area flows into the sand retention layer through the cyclone pipe, silt carried in the rainwater is removed through the sand retention layer, initial rainwater enters the cyclone settling area to form a vortex form, the centrifugal effect of the water flow is enhanced, and particulate matters in the initial rainwater are precipitated; then enters a multi-stage filtering area through an overflow port;
and step 3: multistage filtration of rainwater
The initial rainwater after cyclone precipitation enters a multistage filtering area and is discharged into the external water body after being filtered by the ceramic particle layer, the zeolite layer, the coconut shell activated carbon layer and the quartz sand layer through the water distribution of the water distributor in sequence.
According to the technical scheme, compared with the prior art, the integrated initial rainwater in-situ treatment device and method are provided, the water collection area, the cyclone settling area and the multi-stage filtering area are integrated into one device, the occupied area is small, substances such as SS, N, P and heavy metals in initial rainwater are effectively removed through cyclone precipitation of the cyclone settling area and multi-stage filtering of the multi-stage multi-filtering area, and the treatment effect is good.
In addition, the slope of cyclone tube inserts in the staving of whirl settling zone for the rainwater gets into the whirl and subsides the district and form the vortex state, increases the centrifugal action of rivers, through the whirl deposit with stagnate under the dual function on sand bed, can effectively get rid of the silt of initial stage rainwater, the clearance rate is up to 90%.
Moreover, the bottom of the rotational flow settling zone and the bottom of the multistage filtering zone are designed in an inclined mode, sludge and impurities can be precipitated more conveniently, and the initial rainwater treatment effect is better.
Therefore, in conclusion, the integrated initial rainwater in-situ treatment device and method provided by the invention can overcome the defects of large occupied area, poor effect and the like in the prior art, and have good application prospect and market prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an integrated initial rainwater in-situ treatment device provided by the invention;
FIG. 2 is a top view of the integrated initial rainwater in-situ treatment device according to the present invention;
fig. 3 is a schematic structural diagram of the bottom of a multistage filtering area provided by the invention.
Wherein, 1 is a water collecting area, 2 is a rotational flow settling area, 3 is a multi-stage filtering area, 11 is a rainwater grate, 21 is a first inspection cover, 22 is a sand stagnation layer, 23 is a rotational flow pipe, 24 is an overflow hole, 31 is a second inspection cover, 32 is a water distribution plate, 33 is a ceramic particle layer, 34 is a zeolite layer, 35 is a coconut shell activated carbon layer, 36 is a quartz sand layer, 37 is a bearing plate, 38 is a water outlet pipe, 321 is a water distribution hole
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to the attached drawings 1 and 2, the embodiment of the invention discloses an integrated initial rainwater in-situ treatment device, which comprises: the device comprises a water collecting area 1, a cyclone settling area 2 and a multistage filtering area 3 which are sequentially arranged outside the water collecting area 1; the water collecting area 1, the cyclone settling area 2 and the multistage filtering area 3 are arranged in a ladder shape from high to low;
a detachable sand stagnation layer 22 is arranged on the inner wall of the cyclone settling zone 2; the water collecting area 1 is connected with a sand stagnation layer 22 through a cyclone tube 23; the cyclone settling zone 2 is communicated with the multistage filtering zone 3 through overflow holes 24.
In the invention, the water collecting area, the cyclone settling area and the multistage filtering area are integrated in one device, the floor area is small, the height of the water collecting area is higher than that of the cyclone settling area, and the height of the cyclone settling area is higher than that of the multistage filtering area, so that the initial rainwater can be treated without additional power, the design is ingenious, and the resources and the management cost are saved.
The inner wall of the water collecting area is provided with a water outlet pipe, the water outlet pipe is connected with a cyclone pipe, when the liquid level of rainwater in the water collecting area reaches a certain height, the rainwater flows out through the cyclone pipe, the cyclone pipe is connected with a sand stagnation layer, and a part of silt mixed in the initial rainwater is removed through the sand stagnation layer; when the liquid level in the rotational flow settling zone reaches the height of the overflow hole, the initial rainwater flows into the multistage filtering zone through the overflow hole to perform multistage filtering. Wherein, overflow hole evenly distributed is on a week of whirl settling zone staving, and each overflow hole highly the same, and the quantity is 10 ~ 15.
In the concrete implementation, the water collecting area can adopt a circular barrel body, the barrel body can be made of a modified plastic material, the method for modifying the plastic material is not limited, and only the modified plastic has good corrosion resistance and good plasticity. Similarly, the cyclone settling zone can also adopt a barrel body made of a round modified plastic material, and the size of the barrel body is larger than that of the water collecting zone. The swirl tube can also be made of modified plastic material.
Referring to fig. 1, in a specific implementation, the water collecting region 1 may be fixed in the cyclone settling region 2 by using a first support column 27, and the cyclone settling region 2 may be fixed in the multistage filtering region 3 by using a second support column 39.
When the rainy season is vigorous, redundant rainwater can flow off through the overflow pipe 25 of the rotational flow settling zone so as to ensure the stable operation of the whole device.
Referring to fig. 3, in a specific implementation, the bottom of the multistage filtering area 3 is a complete plate, the circular ring part outside the bottom of the cyclone settling area is uniformly provided with drain holes 311, and the circular ring part is paved with an annular filter screen 310, so as to ensure the outflow of the treated initial rainwater and prevent the outflow of quartz sand; wherein, the aperture of the drain hole 311 is 8-10mm, and the aperture of the annular filter screen is less than 2 mm.
In order to further optimize the technical scheme, a rainwater grate is arranged at the top of the water collecting area 1.
The barrel body of the water collecting area is provided with a rainwater grate which can be made of cast iron materials subjected to anti-corrosion treatment. The rainwater grate can prevent suspended matters in initial rainwater from entering a water collecting area, such as branches, leaves and the like.
In order to further optimize the technical scheme, the cyclone tube 23 is obliquely arranged and is tangentially connected into the sand retention layer 22, wherein the inclination angle of the cyclone tube 23 is 25-35 degrees, and the thickness of the sand retention layer 22 is 45-55 mm.
By adopting the mode that the cyclone tube is tangentially connected into the sand retention layer, the contact time of the rainwater flow and the sand retention layer can be prolonged, a better removal effect is achieved, the removal rate can reach 70%, and when the connection mode is not adopted, the removal rate of silt is only 50% -60%.
In order to further optimize the technical scheme, a first inspection cover 21 is arranged at the top of the cyclone settling zone 2; and the bottom of the cyclone settling zone 2 is funnel-shaped, and the inclination angle is 40-50 degrees.
During specific implementation, the cyclone tube is installed in the water collection area and the cyclone settling area in an arc-shaped manner similar to fan blades, the cyclone tube is obliquely inserted into the barrel body of the cyclone settling area and is tangent to the barrel body of the cyclone settling area and inserted into the inner wall of the barrel body, so that rainwater enters the cyclone settling area to form a vortex state, the centrifugal action of the water flow is enhanced, silt in initial rainwater can be effectively removed under the dual actions of cyclone precipitation and a sand stagnation layer, and the removal rate is as high as 90%; and the bottom in whirl settling zone is for leaking hopper-shaped, helps the sediment to better realize the sediment to the particulate matter in the initial stage rainwater. And opening the inspection cover and the rainwater grate in dry seasons or rainfall-free periods to carry out manual dredging on the sludge at the bottom.
The bottom gradient of the cyclone sedimentation zone is set to be 40-50 degrees, preferably 45 degrees, and a better sedimentation effect is achieved.
In the practical application process, the condition in the cyclone settling area can be observed through the first inspection cover, so that problems can be conveniently found and timely treated.
In order to further optimize the above technical solution, a second inspection cover 31 is arranged on the top of the multi-stage filtration zone 3; the multistage filtering zone 3 is internally provided with a water distribution plate 32, a ceramsite layer 33, a zeolite layer 34, a coconut shell activated carbon layer 35 and a quartz sand layer 36 from top to bottom in sequence; the two adjacent layers of the ceramsite layer 33, the zeolite layer 34, the coconut shell activated carbon layer 35 and the quartz sand layer 36 are separated by a supporting plate 37; the bottom of the multistage filtering area 3 is designed to be a slope, the inclination angle of the slope is 12-18 degrees, and the bottom of the multistage filtering area 3 is provided with a water outlet pipe 38.
The condition in the multistage filtering area can be observed through the second inspection cover; the initial rainwater is dispersed and evenly distributed in each filter layer through the homogenization effect of the water distribution plate. Wherein, the bearing plate plays a role in isolating each filter layer on one hand; on the other hand, the water distributor can also play a role in secondary water distribution. The bottom of the multistage filtering area is set to be a slope, so that the purpose of water collection is achieved, and initial rainwater after filtering can successfully flow into the water outlet pipe, so that the rainwater is discharged to an external water body.
The bottom of the multi-stage filtering area is designed by adopting a slope, the inclination angle is 12-18 degrees, and the collection and the discharge of initial rainwater after filtering are facilitated.
During concrete implementation, a filter screen can be arranged at one end port of the water outlet pipe connected into the multistage filtering area, and the loss of quartz sand filler is prevented.
In order to further optimize the technical scheme, the thickness ratio of the ceramsite layer 33 to the zeolite layer 34 to the coconut shell activated carbon layer 35 to the quartz sand layer 36 is 3:3:4:4, so that SS, N, P and various heavy metals in initial rainwater can be effectively filtered and adsorbed, and the initial rainwater can be treated to the maximum extent.
In order to further optimize the technical scheme, the thickness of the ceramsite layer 33 is 15cm, the particle size of the selected ceramsite is 15-20 mm, and the stacking density is 0.3-0.5 g/ml;
the thickness of the zeolite layer 34 is 15cm, the particle size of the selected zeolite is 10-15 mm, and the bulk density is 1.1-1.3 g/ml;
the thickness of the coconut shell activated carbon layer 35 is 20cm, the particle size of the selected coconut shell activated carbon is 6-8 mm, and the bulk density is 0.45-0.55 g/ml;
the thickness of the quartz sand layer 36 is 20cm, the grain diameter of the selected quartz is 2-4 mm, and the bulk density is 1.8-2 g/ml.
The ceramsite has the functions of decoloring, removing turbidity, removing oil, removing heavy metals and adsorbing nitrogen and phosphorus; the zeolite has the functions of filtering and adsorbing organic matters, ammonia nitrogen, heavy metal ions and suspended matters in initial rainwater; the coconut shell activated carbon has good effects of adsorbing heavy metals, nitrogen and phosphorus; the quartz sand can also play a role in removing organic matters, heavy metals and suspended matters in initial rainwater. The filter materials are arranged into the order of ceramsite, zeolite, coconut shell activated carbon and quartz sand according to the particle size and the function of the 4 filter materials, the proportion of the filler is 3:3:4:4, and pollutants in the initial rainwater are removed to the maximum extent.
In order to further optimize the technical scheme, the water distribution plate 32 is a PVC plate which is 5-10 mm thick and is subjected to antiseptic treatment, and the water distribution plate 32 is provided with water distribution holes 321 with the diameter of 5-10 mm.
In order to further optimize the technical scheme, the bearing plate 37 is made of a PVC plate which is 5-10 mm thick and subjected to antiseptic treatment, and the bearing plate 37 is provided with water permeable holes with the diameter of 5-10 mm.
Here, it should be noted that the anticorrosion treatment method of the PVC plate is not particularly limited, and any PVC plate capable of performing anticorrosion function may be used as the specific example of the present invention.
The device is described below with reference to specific test data, which is shown in table 1.
TABLE 1 treatment of initial rainwater with the inventive device
As can be seen from the table 1, the integrated initial rainwater in-situ treatment device provided by the invention has a good pollutant removal effect and can ensure the treatment effect of initial rainwater.
In summary, the integrated initial rainwater in-situ treatment device provided by the invention overcomes the defects of large occupied area, complex process, poor effect, easy blockage, inconvenient assembly and disassembly, high cost and the like commonly existing in the conventional initial rainwater treatment device.
In addition, the embodiment of the invention also discloses an integrated initial rainwater in-situ treatment method, which comprises the following steps:
step 1: rainwater collection
The initial rainwater is converged into the water collecting area under the action of gravity, and suspended matters in the rainwater are prevented from entering the water collecting area by using the rainwater grate when the rainwater is converged;
step 2: rotational flow sedimentation of rainwater
Rainwater in the water collecting area flows into the sand retention layer through the cyclone pipe, silt carried in the rainwater is removed through the sand retention layer, initial rainwater enters the cyclone settling area to form a vortex form, the centrifugal effect of the water flow is enhanced, and particulate matters in the initial rainwater are precipitated; then enters a multi-stage filtering area through an overflow port;
and step 3: multistage filtration of rainwater
The initial rainwater after cyclone precipitation enters a multistage filtering area and is discharged into the external water body after being filtered by the ceramic particle layer, the zeolite layer, the coconut shell activated carbon layer and the quartz sand layer through the water distribution of the water distributor in sequence.
The integrated in-situ treatment method for the initial rainwater provided by the invention adopts a mode of combining a water collecting tank and a filtering device to treat the initial rainwater, and removes substances such as total SS, N, P and heavy metals of the initial rainwater by means of cyclone precipitation, multistage filtration and the like. And through the stagnant sand layer that sets up on the whirl settling zone is inside, can effectively get rid of the silt that mixes in the initial stage rainwater, effectively prevent filter equipment's at the back jam.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides an integrated form integration initial stage rainwater normal position processing apparatus which characterized in that includes: the device comprises a water collecting area (1), a cyclone settling area (2) and a multi-stage filtering area (3) which are sequentially arranged outside the water collecting area (1); the water collecting area (1), the rotational flow settling area (2) and the multistage filtering area (3) are sequentially arranged in a ladder shape from high to low;
a detachable sand stagnation layer (22) is arranged on the inner wall of the cyclone settling zone (2); the water collecting area (1) is connected with the sand retention layer (22) through a cyclone tube (23); the cyclone tube (23) is arranged in the water collection area (1) and the cyclone settling area (2) in an arc-shaped manner similar to fan blades, the cyclone tube (23) is tangent to the barrel body of the cyclone settling area (2) and is inserted into the cyclone settling area (2), and the cyclone tube (23) is obliquely arranged; the cyclone settling zone (2) is communicated with the multistage filtering zone (3) through overflow holes (24).
2. The integrated initial rainwater in-situ treatment device according to claim 1, wherein a rainwater grate is installed at the top of the water collecting area (1).
3. The integrated initial rainwater in-situ treatment device according to claim 1 or 2, wherein the cyclone tube (23) is obliquely arranged and tangentially connected to the stagnant sand layer (22), wherein the inclination angle of the cyclone tube (23) is 25-35 degrees, and the thickness of the stagnant sand layer (22) is 45-55 mm.
4. The integrated in-situ initial rainwater treatment device according to claim 3, wherein the top of the cyclone settling zone (2) is provided with a first inspection cover (21), and the bottom of the cyclone settling zone (2) is funnel-shaped, and the inclination angle is 40-50 degrees.
5. The integrated in-situ initial rainwater treatment device according to claim 4, wherein a second inspection cover (31) is arranged on the top of the multistage filtering area (3); the multistage filtering area (3) is internally provided with a water distribution plate (32), a ceramsite layer (33), a zeolite layer (34), a coconut shell activated carbon layer (35) and a quartz sand layer (36) from top to bottom in sequence; and the two adjacent layers of the ceramic particle layer (33), the zeolite layer (34), the coconut shell activated carbon layer (35) and the quartz sand layer (36) are separated by a supporting plate (37); the bottom of the multistage filtering area (3) is designed to be a slope, the inclination angle of the slope is 12-18 degrees, and a water outlet pipe (38) is arranged at the bottom of the multistage filtering area (3).
6. The integrated in-situ initial rainwater treatment device according to claim 5, wherein the thickness ratio of the ceramic particle layer (33), the zeolite layer (34), the coconut shell activated carbon layer (35) and the quartz sand layer (36) is 3:3:4: 4.
7. The integrated in-situ initial rainwater treatment device according to claim 6, wherein the thickness of the ceramsite layer (33) is 15cm, the particle size of the selected ceramsite is 15-20 mm, and the bulk density is 0.3-0.5 g/ml;
the thickness of the zeolite layer (34) is 15cm, the particle size of the selected zeolite is 10-15 mm, and the bulk density is 1.1-1.3 g/ml;
the thickness of the coconut shell activated carbon layer (35) is 20cm, the particle size of the selected coconut shell activated carbon is 6-8 mm, and the bulk density is 0.45-0.55 g/ml;
the thickness of the quartz sand layer (36) is 20cm, the particle size of the selected quartz is 2-4 mm, and the bulk density is 1.8-2 g/ml.
8. The integrated initial rainwater in-situ treatment device according to claim 5, wherein the water distribution plate (32) is a PVC plate which is subjected to antiseptic treatment and has a thickness of 5-10 mm, and the water distribution plate (32) is provided with water distribution holes (321) having a diameter of 5-10 mm.
9. The integrated in-situ initial rainwater treatment device according to claim 5, wherein the bearing plate (37) is made of a PVC (polyvinyl chloride) plate which is subjected to antiseptic treatment and has a thickness of 5-10 mm, and the bearing plate (37) is provided with water permeable holes with a diameter of 5-10 mm.
10. An integrated initial rainwater in-situ treatment method is characterized by comprising the following steps:
step 1: rainwater collection
The initial rainwater is converged into the water collecting area under the action of gravity, and suspended matters in the rainwater are prevented from entering the water collecting area by using the rainwater grate when the rainwater is converged;
step 2: rotational flow sedimentation of rainwater
Rainwater in the water collecting area flows into the sand retention layer through a cyclone tube, the cyclone tube is arranged in the water collecting area and the cyclone settling area in an arc-shaped manner similar to fan blades, the cyclone tube is tangent to the barrel body of the cyclone settling area and is inserted into the cyclone settling area, and the cyclone tube is obliquely arranged; removing silt carried in the rainwater through a sand retention layer, enabling the initial rainwater to enter a rotational flow sedimentation area to form a vortex shape, increasing the centrifugal effect of water flow, and precipitating particulate matters in the initial rainwater; then enters a multi-stage filtering area through an overflow port;
and step 3: multistage filtration of rainwater
The initial rainwater after cyclone precipitation enters a multistage filtering area and is discharged into the external water body after being filtered by the ceramic particle layer, the zeolite layer, the coconut shell activated carbon layer and the quartz sand layer through the water distribution of the water distributor in sequence.
CN201810113779.6A 2018-02-05 2018-02-05 Integrated integrated initial rainwater in-situ treatment device and method Active CN108298708B (en)

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