CN106167311B - A kind of technique using slag processing rainwater - Google Patents
A kind of technique using slag processing rainwater Download PDFInfo
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- CN106167311B CN106167311B CN201610592883.9A CN201610592883A CN106167311B CN 106167311 B CN106167311 B CN 106167311B CN 201610592883 A CN201610592883 A CN 201610592883A CN 106167311 B CN106167311 B CN 106167311B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/108—Rainwater harvesting
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Environmental & Geological Engineering (AREA)
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Abstract
The invention discloses a kind of techniques using slag processing rainwater.The technique includes: that (1) collects rainwater through grid filtration, is passed through in buffer-precipitation pond and carries out sedimentation separation；(2) it is neutralized through filtrate bed made of hot application method steel slag, displacement, flocculation；(3) it is passed through coagulating basin and carries out sedimentation separation again；(4) it is filtered through filtrate bed made of the stewing method steel slag of heat.Treated, and rainwater can be used for the industrial or agricultural such as landscape, greening, cooling supplement water.
Description
Technical field
The present invention relates to a kind of techniques using slag processing rainwater, belong to comprehensive utilization of resources field.
Background technique
Steel slag refers to the waste residue of steel industry, and discharge amount is the 10-20% or so of output of steel.For many years accumulate steel slag oneself
Become the evil of environment one, stacking not only occupies a large amount of valuable land resources, and due to the alkali such as CaO, MgO in steel slag
Property substance is more, causes sizable harm to the growth of groundwater quality and plant, also causes very big dirt to ambient enviroment
Dye, generates serious environment hidden danger, brings adverse effect to the sustainable and healthy development of steel industry.
The main chemical compositions of steel slag are CaO, SiO2、FeO、Fe2O3, MgO and free CaO etc..Ferriferous oxide in steel slag
With FeO and Fe2O3Form exists simultaneously, and based on FeO, there are also part free state iron.
According to the processing mode of steel slag, steel slag can be divided into hot application method steel slag and the stewing method steel slag of heat.Contain in hot application method steel slag
The free state calcium oxide and iron of higher proportion, free state calcium oxide content is higher, generally can achieve 6-18%, stores for a long time
Steel slag, free calcium oxide, content of magnesia have to be declined to a certain degree, but content is still 5% or more.The stewing method steel slag of heat is because of steam
It penetrates into inside steel slag, clears up free CaO and MgO, stabilized after steel slag dusting.
In recent years, impermeability path area quicklys increase in city, so that the part that rainwater permeates the ground is reduced, causes
It is gradually increased rainfall runoff.When rainwater forms runoff, earth's surface and pipeline deposit are washed away, a large amount of pollutant can be carried
Into receiving water body, runoff pollution load is made to be multiplied, and rainwater runoff pollution belongs to non-point pollution, had sudden
And noncontinuity.
With urban development, rainwater is increasingly taken seriously as a kind of resource of preciousness.Sponge city is proposed for
The collection and processing of water are put forward higher requirements, and since rainwater washes away ground, because it flows through the difference on road surface, lead to rainwater
Containing a large amount of suspended matter, colloidal substance and certain heavy metal ion, to limit the use field of rainwater.
Summary of the invention
In view of the above-mentioned problems, being carried out the present invention provides a kind of technique for handling rainwater using steel slag to initial rainwater
The processing of rationalization, makes rainwater be reused, while reducing steel slag accumulation, reduces environmental pressure.
A kind of technique using slag processing rainwater, key step are as follows:
(1) rainwater is collected by pipe network, and grid is set in pipeline opening, it is miscellaneous for removing the big solid particle in rainwater
It after object, is passed through in buffer-precipitation pond and carries out sedimentation separation, the residence time is 30~60s；
(2) rainwater after sedimentation separation is passed through neutralization reaction pond, it is interior to be equipped with filtrate made of hot application method steel slag
Bed, for steel slag partial size in 0.5 ~ 1.2mm, gradation is 1.45~1.85, and filtrate bed height is 200~1000mm；Utilize hot application method steel
Free state calcium oxide, magnesia, iron oxide and free iron in slag etc. are neutralized (the H in rainwater to rainwater+Meeting and steel slag
In free alkaline metal oxide occur neutralization reaction, OH can be also generated when alkaline metal oxide is dissolved in water-), set
Change that (Fe can be with the H in rainwater+Occur displacement reaction generate Fe ion), flocculation (meeting of Fe ion and OH-It generates Fe (OH)3, Fe
(OH)3Can be used as flocculant and play certain flocculation) processing, separate heavy metal and colloidal substance in rainwater；
(3) it by step (2) treated rainwater, is passed through in coagulating basin and stops 15~120min and carry out sedimentation separation again,
If handling the higher rainwater of suspension content (such as road runoff), coagulating basin can effectively remove organic pollution materials and suspension
Object；
(4) rainwater in coagulating basin is passed through filtering settling pond, it is interior to be equipped with filtrate bed made of the stewing method steel slag of heat, it adopts
The stewing method steel slag of heat is used as filtrate bed, processing is filtered to rainwater by controlling the gradation of different-grain diameter steel slag；When filtering,
Filter membrane is formed in the lower filter material layer of filter bed surface, microorganism can also secret out of cohesion in addition to it directly can swallow bacterium and make in filter membrane
Enzyme, thus can not only will more peace and quiet water process to delivery turbidity close to zero degree, can preferably remove bacterium, germ, smell with taste,
Coloration and part BOD and COD；
(5) rainwater after filtering precipitating is passed into reserve pool, supplements water for industrial or agricultural such as landscape, greening, coolings.
Grid described in step (1) is the one or more combination of coarse rack, middle grid, fine fack, 0.5mm≤fine fack
Grid spacing≤2mm, grid grid spacing≤5mm in 2mm <, 5mm < coarse rack grid spacing≤10mm.
Step (4) carries out mix and match using filtrate bed made of the stewing method steel slag of heat, using the steel slag particle of different-grain diameter,
1mm≤fine grained partial size≤5mm, grade fit over 2.55~2.65,5mm < coarse granule partial size≤20mm, and grade fits over 1.5~1.75,
Large or fine granule is matched 1.5~5, and filtrate bed height is in 200~1000mm.
The advantages and positive effects of the present invention are:
(1) steel slag reuse dealkalize, realizes waste treatment and waste, and reduces solid waste land occupation and cost of disposal；
(2) processing rainwater is collected, rainwater resource is recycled；
(3) simple process, equipment is simple to operation, has good economy.
Detailed description of the invention
Fig. 1 is present invention process flow diagram.
Specific embodiment
Embodiment 1
The rainwater for collecting certain residential quarter roofing and road is intercepted using 5.5mm coarse rack and 1.5mm fine fack, is gone
After bulky grain sundries, rainwater is passed into buffer-precipitation pond, carries out sedimentation separation, residence time 30s；Then by rain
Water is passed through in neutralization reaction pond, the filtrate bed made of hot application method steel slag (steel slag partial size=0.5mm, gradation=1.55, the filtrate height of bed
Degree=350mm) rainwater is neutralized, is replaced and flocculation treatment, separate heavy metal and colloidal substance in rainwater；Through
Rainwater after crossing flocculation is passed into coagulating basin, is stopped 40min and is carried out sedimentation separation, filtering settling pond is passed through later, via heat
Filtrate bed filtering that stewing method steel slag is constituted (fine grained partial size=3mm, gradation=2.58, coarse granule partial size=12mm, gradation=1.5, slightly
Fine grained proportion=2.2, filtrate bed height=350mm), eventually enter into rainwater reserve pool, the rainwater of recycling be used to residential quarters greening,
Rinse road etc..
Embodiment 2
Storm sewer outlet setting 2mm fine fack is collected on certain plant area roof, rainwater is intercepted, removal bulky grain is miscellaneous
Object；Underground buffer sedimentation basin is then passed to, sedimentation separation, residence time 45s are carried out；Neutralization reaction pond is then passed to, by heat
Filtrate bed (steel slag partial size=0.8mm, gradation=1.45, filtrate bed height=200mm) made of method steel slag is sprinkled in rainwater progress
With displacement and flocculation treatment, separate heavy metal and colloidal substance in rainwater；Rainwater after flocculation is passed into mixed
In solidifying pond, stops 15min and carry out sedimentation separation, be passed through filtering settling pond later, the filtrate bed mistake constituted via the stewing method steel slag of heat
Filter (fine grained partial size=1mm, gradation=2.55, coarse granule partial size=6mm, gradation=1.62, large or fine granule proportion=1.5, filtrate bed
Highly=200mm), rainwater reserve pool is eventually entered into, the rainwater of recycling is used to plant area's greening, industry cooling etc..
Embodiment 3
The rainwater on certain square and its periphery street, after pipe network is collected, by grid in 6.8mm coarse rack and 2.5mm into
Row intercepts, and into buffer-precipitation pond, carries out sedimentation separation, residence time 60s；Then rainwater is passed through neutralization reaction pond, by
Filtrate made of hot application method steel slag (steel slag partial size=1.2mm, gradation=1.85, filtrate bed height=1000mm) is in rainwater progress
With displacement and flocculation, then the rainwater after flocculation is passed through coagulating basin, hydraulic detention time 120min carries out sedimentation separation, later
It is passed through filtering settling pond, filters (fine grained partial size=5mm, gradation=2.65, coarse granule via the filtrate bed that the stewing method steel slag of heat is constituted
Partial size=20mm, gradation=1.75, large or fine granule proportion=5, filtrate bed height=1000mm), rainwater reserve pool is eventually entered into, is used for
Greening, Square Central fountain etc..
Claims (6)
1. a kind of technique using slag processing rainwater, step include:
(1) rainwater is collected to be passed through in buffer-precipitation pond after grid filtration and carry out sedimentation separation；
(2) rainwater after sedimentation separation is passed through neutralization reaction pond, is equipped with made of hot application method steel slag in neutralization reaction pond
Filtrate bed neutralizes rainwater, is replaced, is flocculated；
(3) it by step (2) treated rainwater, is passed through in coagulating basin and carries out sedimentation separation again；
(4) it by step (3) treated rainwater is passed through filtering settling pond, is equipped with made of the stewing method steel slag of heat in filtering settling pond
Filtrate bed is passed through reserve pool after filtering.
2. technique according to claim 1, which is characterized in that the grid is one kind of coarse rack, middle grid, fine fack
Or several combinations, grid grid spacing≤5mm in 0.5mm≤fine fack grid spacing≤2mm, 2mm <, 5mm < coarse rack grid spacing
≤10mm。
3. technique according to claim 1, which is characterized in that step (1) rainwater is in buffer-precipitation pond when sedimentation separation
Between be 30~60s.
4. technique according to claim 1, which is characterized in that the filtrate bed made of hot application method steel slag, steel in step (2)
Slag particle diameter is 0.5 ~ 1.2mm, and gradation is 1.45~1.85, and filtrate bed height is 200 ~ 1000mm.
5. technique according to claim 1, which is characterized in that step (3) rainwater sedimentation separation time in coagulating basin is
15~120min.
6. technique according to claim 1, which is characterized in that step (4) is made using filtrate bed made of the stewing method steel slag of heat
Mix and match, 1mm≤fine grained partial size≤5mm are carried out with the steel slag particle of different-grain diameter, gradation is 2.55~2.65,5mm <
Coarse granule partial size≤20mm, gradation are 1.5~1.75, and large or fine granule proportion is 1.5~5, and filter bed height is 200~1000mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610592883.9A CN106167311B (en) | 2016-07-26 | 2016-07-26 | A kind of technique using slag processing rainwater |
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| CN201610592883.9A CN106167311B (en) | 2016-07-26 | 2016-07-26 | A kind of technique using slag processing rainwater |
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| CN106167311A CN106167311A (en) | 2016-11-30 |
| CN106167311B true CN106167311B (en) | 2019-02-05 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862945A (en) * | 2018-09-21 | 2018-11-23 | 江苏百海环保科技有限公司 | A kind of urban rainwater collection cleansing and recycling system |
| CN109574270A (en) * | 2018-12-14 | 2019-04-05 | 博大绿泽生态建设集团有限公司 | A method of utilizing active carbon and slag processing rainwater |
| CN109372063A (en) * | 2018-12-14 | 2019-02-22 | 青岛润通源水务工程设备有限责任公司 | A kind of no negative pressure pipe network pressurizing current stabilization supply equipment |
| CN112723554B (en) * | 2020-11-05 | 2023-02-28 | 云南锦淮环保科技有限公司 | Composite biological water purifying agent and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201254511Y (en) * | 2008-06-20 | 2009-06-10 | 天津科技大学 | Rainwater purification apparatus |
| CN203451288U (en) * | 2013-08-30 | 2014-02-26 | 武汉大学 | Compound ecological ditch for treating surface source sewage in village |
| CN104445824A (en) * | 2014-12-08 | 2015-03-25 | 北京东方园林股份有限公司 | System and method for purifying water area surface source pollution |
| CN205222960U (en) * | 2015-12-19 | 2016-05-11 | 长安大学 | Residence community rainwater processing system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4522179B2 (en) * | 2004-07-20 | 2010-08-11 | 株式会社オーシマ・デザイン設計 | Method of treating rainwater or snowmelt water with steel slag |
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- 2016-07-26 CN CN201610592883.9A patent/CN106167311B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201254511Y (en) * | 2008-06-20 | 2009-06-10 | 天津科技大学 | Rainwater purification apparatus |
| CN203451288U (en) * | 2013-08-30 | 2014-02-26 | 武汉大学 | Compound ecological ditch for treating surface source sewage in village |
| CN104445824A (en) * | 2014-12-08 | 2015-03-25 | 北京东方园林股份有限公司 | System and method for purifying water area surface source pollution |
| CN205222960U (en) * | 2015-12-19 | 2016-05-11 | 长安大学 | Residence community rainwater processing system |
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