CN1923723A - Composite fly ash filling and application thereof - Google Patents

Composite fly ash filling and application thereof Download PDF

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Publication number
CN1923723A
CN1923723A CNA2006101127594A CN200610112759A CN1923723A CN 1923723 A CN1923723 A CN 1923723A CN A2006101127594 A CNA2006101127594 A CN A2006101127594A CN 200610112759 A CN200610112759 A CN 200610112759A CN 1923723 A CN1923723 A CN 1923723A
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China
Prior art keywords
water
fly ash
filler
coal
filling
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CNA2006101127594A
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Chinese (zh)
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CN100410185C (en
Inventor
张鸿涛
张秋贞
廖志民
吴吉军
万爱国
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清华大学
江西金达莱环保研发中心有限公司
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Application filed by 清华大学, 江西金达莱环保研发中心有限公司 filed Critical 清华大学
Priority to CNB2006101127594A priority Critical patent/CN100410185C/en
Publication of CN1923723A publication Critical patent/CN1923723A/en
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Publication of CN100410185C publication Critical patent/CN100410185C/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/10Biological treatment of water, waste water, or sewage

Abstract

The invention discloses composite fly ash filler in the effluent disposal technological domain, which comprises the following steps: rough fly coal, fine fly ash, sodium silicate, kwan-yin soil, white cement and water. The preparing method comprises the following steps: blending each material according to proportion; adding water to stir; forming mini-ball grain size at 5-20 mm; heating; insulating; cooling naturally; watering; drying to obtain the product; fitting for artificial marshland to dispose effluent.

Description

A kind of composite fly ash filling and application thereof

Technical field:

The present invention relates to a kind of composite fly ash filling and application thereof, adopted the artificial swamp of this filler can handle in water, contaminated landscape water, sanitary sewage etc., belong to technical field of sewage.

Background technology

Flyash is a kind of mixing material like the volcano grey matter that coal dust forms behind high-temp combustion, mainly is the solid waste of industry dischargings such as coal-burning power plant, smelting, chemical industry.Owing to many-sided reason, the utilization of fly ash rate of China is also lower, and major part still is stored in ash, still has a small amount of flyash to waft among the atmosphere.Policy Conditions do not allow to rivers,lakes and seas dischargings flyash, but because the ash discharge facility improves inadequately and has managerial problem, still have a small amount of flyash to flow into water body together with buck, these all to environment structure source of pollution.

Flyash is multiple particulate polymer, has the porous feature, and characteristics such as grittiness, light weight, quick permeation, suction are strong, excellent adsorption are arranged, and also contains the needed trace element of a variety of plant-growths, and effect of increasing production is comprehensive.Heat, protect entropy, strengthen the permeability effect.The pH value of flyash itself is about 8.2, and using flyash has certain influence to alkaline soil, but not fairly obvious, acid soil is then influenced more obvious, the part that can neutralize acidity.

Artificial swamp is a kind of ecological wastewater processing technology, utilizes physics, chemistry, biological acting in conjunction in the ecosystem to purify waste water.It is, to form by soil with by a body of the certain rank filler of certain slope filling when in the depression of the bottom surface gradient in certain length and width.Sewage can flow in the filler slit, plant on the surface of bed body that some handling properties are good, surviving rate is high, water resisting property is strong, growth cycle is long and have and view and admire or the waterplant of economic worth, form the animals and plants ecotope of a uniqueness, sewage is handled.As a kind of water technology of novel ecological, advantage such as artificial swamp has less investment, energy consumption is little, working cost is low, treatment effect is stable, the anti impulsion load ability is strong.When disposing of sewage, and can produce certain economic benefits, improve ecoscape and species diversity simultaneously, have certain ecological environment benefit.

Summary of the invention:

The objective of the invention is to propose a kind of composite fly ash filling and application thereof, utilize the waste residue in the industrial production, produce the compounded mix of a kind of low cost, bigger serface, open grain, strongly hydrophilic, to be used for sewage disposals such as artificial swamp

Technical field.

The composite fly ash filling that the present invention proposes, the weight percent that is used to prepare the various raw materials of filler is:

Meal coal ash 20%~40%

Fine powdered coal 15%~25%

Water glass 5%~10%

White clay 2%~6%

White cement 10%~15%

Water surplus

Its preparation method comprises following each step:

(1) above-mentioned various raw materials are added the water stirring behind the mixing in proportion, make the bead of particle diameter 5mm~20mm, the granularity of meal coal ash is 0.5~5mm in the raw material, and the granularity of fine powdered coal is 3~200 μ m;

(2) 100 ℃~200 ℃ down heating 2~5 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 4~10 hours promptly gets this product behind the natural air drying.

The application of above-mentioned composite fly ash filling can be applied to artificial swamp, disposes of sewage as the filler of artificial swamp.

The composite fly ash filling that the present invention proposes, advantage such as possess hydrophilic property is good, porosity is high, specific surface area is big, adsorptivity is strong, bio-film colonization is effective has not only strengthened the absorption property of flyash, and can significantly improve the water flow velocity of crossing of artificial swamp.Be used for artificial swamp, water, contaminated landscape water in not only can handling, but also can handle municipal sanitary sewage.Water monitoring data shows, when the concentration of municipal sanitary sewage is COD 70.12mg/L, BOD 17.95mg/L, NH 3When-N8.805mg/L, TP 1.094mg/L, after entering the horizontal drowned flow artificial wet land that adopts compounded mix of the present invention and handling, water outlet is COD 19.34mg/L, BOD 1.42mg/L, NH 3-N 0.852mg/L, TP 0.167mg/L have reached the III class water quality standard of " water environment quality standard (GB3838-2002) " regulation, can enter landscape water fully, particularly as the make up water of manmade landscape, artificial landscape's water body in the residential quarters.This artificial swamp is fine to the treatment effect of sanitary sewage, and clearance is followed successively by COD 72.41%, BOD 92.09%, NH 3-N 89.98%, TP 84.77%.

Embodiment

The composite fly ash filling that the present invention proposes, the weight percent that is used to prepare the various raw materials of filler is:

Meal coal ash 20%~40%

Fine powdered coal 15%~25%

Water glass 5%~10%

White clay 2%~6%

White cement 10%~15%

Water surplus

Its preparation method is: at first above-mentioned various raw materials are added the water stirring behind the mixing in proportion, make the bead of particle diameter 5mm~20mm, the granularity of meal coal ash is 0.5~5mm in the raw material, and the granularity of fine powdered coal is 3~200 μ m; 100 ℃~200 ℃ down heating 2~5 hours, be incubated 1 hour then, naturally cool to room temperature after, water seasoning 4~10 hours promptly gets this product behind the natural air drying.

The used meal coal ash and the source of fine powdered coal can be the boiler ashs of power station or steelworks in the raw material of composite fly ash filling of the present invention, and generally speaking, the granularity of meal coal ash is 0.5~5mm, and the granularity of fine powdered coal is 3~200 μ m:

Each chemical composition in the composite fly ash filling of the present invention is measured through X-ray diffraction method, and its main component is: Na 2SiO 359.4%, CaCO 321.2%, SiO 214.0%, Fe 2O 30.9%, CaO 4.5%, more than is massfraction.In addition, compounded mix of the present invention has 3.9 * 10 4Cm 2The specific surface area of/g, tap density are 0.96g/cm 3, apparent density 1.52g/cm 3, cylindrical compress strength 96.32KPa piles up voidage 36.84%, interior porosity 18.30%, sour soluble rate 45.0%, percentage of damage 22.8%, wear rate 12.7%, water-intake rate 19.24%.

In the raw material of composite fly ash filling of the present invention, used white cement, water glass and white clay can play binding agent.Used water glass is a binding agent, has the effect of pore-forming material again concurrently.And white clay has become pottery through behind the high-temperature firing.

Composite fly ash filling of the present invention can be used as the filler of artificial swamp, and with the absorption pollutants in sewage, the microbial film by the filling surface growth is with contaminant degradation.

Below be embodiments of the invention:

Embodiment 1

By weight percentage, get meal coal ash 28%, fine powdered coal 20%, water glass 8%, white clay 4%, white cement 13% behind above-mentioned powder mixing, adds entry 27% and stirs, and makes the bead about particle diameter 1cm; 160 ℃ of down heating 3 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 4 hours obtains the flyash bead behind the natural air drying.

Measure the adsorptive power of this bead, obtaining this filler unit mass is 12.02% to the adsorption rate of ammonia nitrogen; Adopt electronic bending test machine, measuring its ultimate compression strength is 312.0N.

Embodiment 2

By weight percentage, get meal coal ash 20%, fine powdered coal 25%, water glass 10%, white clay 2%, white cement 15% behind above-mentioned powder mixing, adds entry 28% and stirs, and makes the bead about particle diameter 1cm; 100 ℃ of down heating 4 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 6 hours obtains the flyash bead behind the natural air drying.

Measure the adsorptive power of this bead, obtaining this filler unit mass is 10.78% to the adsorption rate of ammonia nitrogen; Adopt electronic bending test machine, measuring its ultimate compression strength is 445.3N.

Embodiment 3

By weight percentage, get meal coal ash 40%, fine powdered coal 15%, water glass 5%, white clay 6%, white cement 10% behind above-mentioned powder mixing, adds entry 24% and stirs, and makes the bead about particle diameter 1cm; 200 ℃ of down heating 5 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 10 hours obtains the flyash bead behind the natural air drying.

Measure the adsorptive power of this bead, obtaining this filler unit mass is 14.26% to the adsorption rate of ammonia nitrogen; Adopt electronic bending test machine, measuring its ultimate compression strength is 283.6N.

The Application Example of composite fly ash filling of the present invention is as follows:

Adopt the artificial swamp of the compounded mix of the foregoing description 1 preparation to dispose of sewage.

With the municipal wastewater is the water inlet water source, and measuring its influent concentration is COD 70.12mg/L, BOD 17.95mg/L, NH 3-N8.805mg/L, TP 1.094mg/L.After the horizontal drowned flow artificial wet land processing of adopting compounded mix of the present invention, the water quality of water outlet is COD 19.34mg/L, BOD 1.42mg/L, NH 3-N 0.852mg/L, TP 0.167mg/L, clearance are followed successively by COD 72.41%, BOD 92.09%, NH 3-N 89.98%, TP 84.77%.

With the municipal wastewater is the water inlet water source, and measuring its influent concentration is COD 108.81mg/L, NH 3-N 11.010mg/L, TP 1.701mg/L.After the horizontal drowned flow artificial wet land processing of adopting compounded mix of the present invention, the water quality of water outlet is COD14.51mg/L, NH 3-N 1.070mg/L, TP 0.155mg/L, clearance is followed successively by COD 86.67%, NH 3-N 90.28%, TP 90.90%.

Claims (2)

1, a kind of composite fly ash filling is characterized in that, the weight percent that is used to prepare the various raw materials of filler is:
Meal coal ash 20%~40%
Fine powdered coal 15%~25%
Water glass 5%~10%
White clay 2%~6%
White cement 10%~15%
Water surplus
Its preparation method comprises following each step:
(1) above-mentioned various raw materials are added the water stirring behind the mixing in proportion, make the bead of particle diameter 5mm~20mm, the granularity of meal coal ash is 0.5~5mm in the raw material, and the granularity of fine powdered coal is 3~200 μ m;
(2) 100 ℃~200 ℃ down heating 2~5 hours, be incubated 1 hour, naturally cool to room temperature after, water seasoning 4~10 hours promptly gets this product behind the natural air drying.
2, a kind of application of composite fly ash filling as claimed in claim 1 is characterized in that this flyash applying filler in artificial swamp, disposes of sewage as the filler of artificial swamp.
CNB2006101127594A 2006-09-01 2006-09-01 Composite fly ash filling and application thereof CN100410185C (en)

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Application Number Priority Date Filing Date Title
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CN100410185C CN100410185C (en) 2008-08-13

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863646A (en) * 2010-06-21 2010-10-20 南京工业大学 Filler special for artificial wetland and preparation method thereof
CN102249403A (en) * 2011-05-05 2011-11-23 江苏大学 Method for preparing modified coal gangue-pulverized fuel ash composite filling for purifying sewage
CN102266752A (en) * 2011-06-24 2011-12-07 东北师范大学 Method for preparing carbonizing absorption grains used for purifying water
CN102485663A (en) * 2011-03-10 2012-06-06 中国环境科学研究院 Constructed wetland composite filling material for water treatment and preparation method thereof
CN102616921A (en) * 2012-04-09 2012-08-01 河海大学 Composite ecological fillers and preparation method thereof
CN102746023A (en) * 2012-06-15 2012-10-24 中国建筑股份有限公司 Constructed wetland matrix filling material for simultaneous nitrogen and phosphorus removal and its preparation method
CN103739058A (en) * 2014-01-06 2014-04-23 上海交通大学 Sewage reinforced phosphorous removal packing and preparation method thereof
CN104828934A (en) * 2015-05-19 2015-08-12 傅成义 Efficient denitrification bio-aerating filter filler and preparation method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101723507B (en) * 2009-12-11 2011-05-18 华南理工大学 Three-dimensional concrete filling material for water treatment and preparation method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1240622C (en) * 2004-02-17 2006-02-08 东莞理工学院 Preparation process of multifunctional flyash sewage treatment material
CN100344552C (en) * 2005-06-24 2007-10-24 大连理工大学 Method and apparatus for treating urban sewage by means of flue gas desulfurization of power plant and fly ash

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101863646A (en) * 2010-06-21 2010-10-20 南京工业大学 Filler special for artificial wetland and preparation method thereof
CN102485663A (en) * 2011-03-10 2012-06-06 中国环境科学研究院 Constructed wetland composite filling material for water treatment and preparation method thereof
CN102249403A (en) * 2011-05-05 2011-11-23 江苏大学 Method for preparing modified coal gangue-pulverized fuel ash composite filling for purifying sewage
CN102266752A (en) * 2011-06-24 2011-12-07 东北师范大学 Method for preparing carbonizing absorption grains used for purifying water
CN102266752B (en) * 2011-06-24 2013-01-02 东北师范大学 Method for preparing carbonizing absorption grains used for purifying water
CN102616921A (en) * 2012-04-09 2012-08-01 河海大学 Composite ecological fillers and preparation method thereof
CN102746023A (en) * 2012-06-15 2012-10-24 中国建筑股份有限公司 Constructed wetland matrix filling material for simultaneous nitrogen and phosphorus removal and its preparation method
CN103739058A (en) * 2014-01-06 2014-04-23 上海交通大学 Sewage reinforced phosphorous removal packing and preparation method thereof
CN103739058B (en) * 2014-01-06 2015-12-09 上海交通大学 A kind of reinforced sewage dephosphorization filler and preparation method thereof
CN104828934A (en) * 2015-05-19 2015-08-12 傅成义 Efficient denitrification bio-aerating filter filler and preparation method thereof

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Address after: 100084 Beijing City, Haidian District Tsinghua Yuan

Patentee after: Tsinghua University

Patentee after: Jiangxi JDL Environmental Protection Ltd

Address before: 100084 Beijing City, Haidian District Tsinghua Yuan

Patentee before: Tsinghua University

Patentee before: Jiangxi JDL Environmental Protection Research Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080813

Termination date: 20160901