CN1903424A - Composite adsorbent contg. flyash and its prepn. method - Google Patents
Composite adsorbent contg. flyash and its prepn. method Download PDFInfo
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- CN1903424A CN1903424A CN 200510043011 CN200510043011A CN1903424A CN 1903424 A CN1903424 A CN 1903424A CN 200510043011 CN200510043011 CN 200510043011 CN 200510043011 A CN200510043011 A CN 200510043011A CN 1903424 A CN1903424 A CN 1903424A
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- flyash
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- superfined
- compound adsorbent
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Abstract
A composite adsorbent for adsorbing the organic and inorganic pollutants from aqueous solution is prepared from powdered coal ash through ball grinding, adding NaOH solution, magnetic stirring while reacting, adding H2SO4 solution, reacting while stirring, treating with ammonia water, baking and pulverizing.
Description
Technical field
The invention belongs to wastewater treatment scavenging material field, relate to the preparation method of shaping powder coal ash compound adsorbent.
Background technology
Flyash is the discarded object that electric field is discharged, and its main component is SiO
2, Al
2O
3, CaO, Fe
2O
3Deng, also contain a spot of other materials simultaneously.Flyash is made up of the particulate that much has different structure and form, about 25～300 μ m of the particle diameter of single fly ash grain, average geometric particle diameter 40 μ m.Porosity is generally 60%～75%.Flyash has loose structure, and porosity is generally 60%～75%, and specific area is generally at 2500～5000m
2/ g has stronger adsorption capacity.Heavy metal ion in the waste water, pharmacy waste water, colorful wastewater, sanitary sewage etc. there is certain absorption removal effect.But owing to flyash this as reasons such as fine particle and absorption property are undesirable, make it to adorn post operation and separation difficulty, thereby be difficult at industrialized utilization.Flyash is carried out forming processes, and the preparation formed absorbent is a flyash industrialized utilization key.
Summary of the invention
The object of the present invention is to provide a kind of preparation method and technology of use in waste water treatment formed absorbent, it earlier through ultra-fine ball milling, obtains superfined flyash with flyash, adds NaOH solution, makes it to generate sodium metasilicate with the flyash reaction, and the back adds H
2SO
4Solution, reactive polymeric generate poly-silicic acid, the further aging silica gel that becomes.The silica gel that generates bonds together moulding with fly ash grain and obtains the fly ash base compound adsorbent.In order to increase the porosity of adsorbent, in polymerization process, add the low concentration ammonia aqueous solution.Flyash with acid, also can generate polyaluminium sulfate, bodied ferric sulfate and remaining water treatments such as poly-silicic acid coagulant in the alkali reaction process, compound coagulant can the good coagulation effect of generation in the process of wastewater treatment.Absorption and coagulation synergy will improve the water treatment effect greatly.The silica gel that reaction is generated is porous mass, can provide passage for flyash absorption, and silica gel also has absorption property preferably to the pollutant in the water and air, also can produce collaborative suction-operated.
Preparation method of the present invention is different from the charing and the activating process of traditional adsorbent preparation, according to the tightly packed a large amount of holes that help adsorbing that produce in the high surface of the composition of flyash and physicochemical properties, superfine powder and the composite molding process thereof, flyash and chemical reagent reaction original position are generated the bonding agent composite molding, the ultra-fine compound adsorbent of preparation fly ash base.What this method also was different from common employing adds the bonding agent composite molding technique, and the composition and property that makes full use of flyash generates bonding agent silica gel, has both simplified technology and also can obtain abundanter hole, reduces cost, improves absorption property.With acid, can generate water treatment coagulant such as polyaluminium sulfate, bodied ferric sulfate and poly-silicic acid in the alkali reaction process, compound coagulant can the good coagulation effect of generation in the process of wastewater treatment at flyash.Absorption and coagulation synergy will improve the water treatment effect greatly.
The preparation method of flyash compound adsorbent of the present invention is as follows:
Get the 20g superfined flyash, add the NaOH solution of 80ml concentration 15%, place to be stirred to reactant on 80 ℃ of constant temperature blender with magnetic force and to be the pitch shape.The H that adds 10ml concentration 10%
2SO
4Solution stirs, reaction 2h.The ammoniacal liquor that adds 15ml 0.15%～0.18% is placed more than the 6h, puts into drying in oven then.Block mixture of fly ash is taken out, be broken into the particle that granularity is 1～3mm, obtain the fly ash base compound adsorbent.
The present invention has the following advantages compared with the prior art:
1. the present invention is a shaping powder coal ash compound adsorbent, mechanical strength is preferably arranged, thereby has overcome flyash and be difficult to adorn the difficult problem of separating between post operation and flyash and the processing moisture, and helps industrial utilization.
2. the present invention is according to the composition and property of flyash, carries out chemical reaction and generates silica gel as the moulding binding agent, and silica gel itself has abundant hole and absorption property preferably.Be easy to control binder amount and degree of scatter and produce cooperative effect.
3. the flyash compound adsorbent of the present invention's preparation integrates absorption, coagulation, is a kind of brand-new wastewater treatment material.
The specific embodiment
Below by embodiment the preparation of flyash compound adsorbent among the present invention is further described.
Embodiment 1
Get 160g flyash, ball milling 5h gets superfined flyash on planetary ball mill.Flyash is 1: 4, rotating speed 300r/min with the steel ball quality ratio.Get the 20g superfined flyash, add 15% NaOH solution 80ml, place on the constant temperature blender with magnetic force 100 ℃ to be stirred to reactant and to be the pitch shape.The H of adding 10%
2SO
4Solution 5ml reacts 2h, the broken product that gets in oven dry back.
Embodiment 2
Get 160g flyash, ball milling 5h gets superfined flyash on planetary ball mill.Flyash is 1: 4, rotating speed 300r/min with the steel ball quality ratio.Get the 20g superfined flyash, add 15% NaOH solution 80ml, place on the constant temperature blender with magnetic force 100 ℃ to be stirred to reactant and to be the pitch shape.The H of adding 10%
2SO
4Solution 5ml reacts 2h.Handle more than the 6h with the ammonia spirit of 15ml 0.15% back, the oven dry back broken product.
Embodiment 3
Get 160g flyash, ball milling 5h gets superfined flyash on planetary ball mill.Flyash is 1: 4, rotating speed 300r/min with the steel ball quality ratio.Take by weighing the 20g superfined flyash, add 15% NaOH solution 80ml, place on the constant temperature blender with magnetic force 100 ℃ to be stirred to reactant and to be the pitch shape.The H of adding 10%
2SO
4Solution 10ml reacts, and stirs, and handles more than the 6h the broken product that gets in oven dry back with 15ml concentration 0.15% ammonia spirit.
Claims (6)
1. the preparation method of a flyash compound adsorbent comprises the preparation of raw material and the composite molding of adsorbent.Its feature and preparation process are as follows: the processing of (1) raw material: raw materials used ultra-fine grinding obtains superfined flyash through ball mill for electric field flyash; (2) composite molding of adsorbent: get superfined flyash, add NaOH solution, stirring reaction adds H then to the pitch shape under 80-100 ℃ of constant temperature
2SO
4Solution, the afterreaction 2h that stirs adds ammonia spirit again and handles more than the 6h, the broken product that gets in oven dry back.
2. the preparation method of flyash compound adsorbent according to claim 1 is characterized in that its preparation technology: superfined flyash preparation (1) → alkali treatment (2) → acid treatment (3) → ammonia treatment (4) → moulding (5) → finished product (6).
3. the preparation method of flyash compound adsorbent according to claim 1 is characterized in that in turn including the following steps:
A, flyash is obtained superfined flyash at the ball mill ball milling;
B, in superfined flyash, add NaOH solution stirring reaction under 80-100 ℃ of constant temperature;
C, adding H
2SO
4Solution, afterreaction 2h stirs;
D, adding ammonia spirit are handled more than the 6h;
E, drying, the broken product that gets.
4. the preparation method of flyash compound adsorbent according to claim 1, the forming method that it is characterized in that superfined flyash adopt flyash and NaOH solution reaction generation sodium metasilicate, sodium metasilicate again with H
2SO
4Solution reaction generation silicic acid, silicic acid polymerization become poly-silicic acid, wearing out becomes silica gel, with the flyash molding bonded.
5. the preparation method of flyash compound adsorbent according to claim 1 is characterized in that, the flyash that adopts is the superfined flyash that fly ash in electric power plant obtains through ultra-fine grinding.
6. the preparation method of flyash compound adsorbent according to claim 1 is characterized in that, prepared flyash compound adsorbent can be made into the solid particle of different shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100430119A CN100381201C (en) | 2005-07-28 | 2005-07-28 | Composite adsorbent contg. flyash and its prepn. method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100430119A CN100381201C (en) | 2005-07-28 | 2005-07-28 | Composite adsorbent contg. flyash and its prepn. method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1903424A true CN1903424A (en) | 2007-01-31 |
| CN100381201C CN100381201C (en) | 2008-04-16 |
Family
ID=37672877
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|---|---|---|---|
| CNB2005100430119A Expired - Fee Related CN100381201C (en) | 2005-07-28 | 2005-07-28 | Composite adsorbent contg. flyash and its prepn. method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102008936A (en) * | 2010-12-25 | 2011-04-13 | 河南科技大学 | Method for preparing phosphorus adsorbing material from fly ash |
| CN102179232A (en) * | 2011-02-17 | 2011-09-14 | 杭州电子科技大学 | Method for preparing flying ash/activated carbon compound adsorbent used for demercuration |
| CN101733111B (en) * | 2008-11-10 | 2012-02-29 | 中国石油大学(北京) | Perovskite/cerium dioxide composite catalyst and preparation method thereof and catalytic combustion on soot |
| CN103028379A (en) * | 2012-12-31 | 2013-04-10 | 西安科技大学 | Preparation method of coal-based chelate sorbent |
| CN106237976A (en) * | 2016-08-09 | 2016-12-21 | 神华集团有限责任公司 | A kind of adsorbent and its preparation method and application |
| CN106824053A (en) * | 2017-04-06 | 2017-06-13 | 东北大学 | A kind of preparation method of the fly ash-based adsorbent of efficient absorption dyestuff |
| CN107158942A (en) * | 2017-06-30 | 2017-09-15 | 合肥天翔环境工程有限公司 | A kind of sintering furnace flue-gas dust-removing and desulfurization system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD156254A1 (en) * | 1981-02-12 | 1982-08-11 | Bergk Karl Heinz | PROCESS FOR PREPARING AN ALUMOSILIC ADSORB |
| JP3957899B2 (en) * | 1998-11-12 | 2007-08-15 | 株式会社日本海水 | Regeneration method of arsenic adsorbent |
| CN1175927C (en) * | 2003-01-17 | 2004-11-17 | 中唯炼焦技术国家工程研究中心有限责任公司 | Modified adsorbent of fly ash and method for treating waste water by using absorbent |
| KR20030061720A (en) * | 2003-05-29 | 2003-07-22 | 주식회사 대진환경산업 | Manufacturing of Pore type Zeolite Media using Coal Fly Ash and it's application for removing ammonia and heavy metals and media in growing Microorganism. |
-
2005
- 2005-07-28 CN CNB2005100430119A patent/CN100381201C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101733111B (en) * | 2008-11-10 | 2012-02-29 | 中国石油大学(北京) | Perovskite/cerium dioxide composite catalyst and preparation method thereof and catalytic combustion on soot |
| CN102008936A (en) * | 2010-12-25 | 2011-04-13 | 河南科技大学 | Method for preparing phosphorus adsorbing material from fly ash |
| CN102008936B (en) * | 2010-12-25 | 2013-01-09 | 河南科技大学 | Method for preparing phosphorus adsorbing material from fly ash |
| CN102179232A (en) * | 2011-02-17 | 2011-09-14 | 杭州电子科技大学 | Method for preparing flying ash/activated carbon compound adsorbent used for demercuration |
| CN102179232B (en) * | 2011-02-17 | 2012-06-27 | 杭州电子科技大学 | Method for preparing flying ash/activated carbon compound adsorbent used for demercuration |
| CN103028379A (en) * | 2012-12-31 | 2013-04-10 | 西安科技大学 | Preparation method of coal-based chelate sorbent |
| CN106237976A (en) * | 2016-08-09 | 2016-12-21 | 神华集团有限责任公司 | A kind of adsorbent and its preparation method and application |
| CN106237976B (en) * | 2016-08-09 | 2019-02-15 | 神华集团有限责任公司 | A kind of adsorbent and its preparation method and application |
| CN106824053A (en) * | 2017-04-06 | 2017-06-13 | 东北大学 | A kind of preparation method of the fly ash-based adsorbent of efficient absorption dyestuff |
| CN107158942A (en) * | 2017-06-30 | 2017-09-15 | 合肥天翔环境工程有限公司 | A kind of sintering furnace flue-gas dust-removing and desulfurization system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100381201C (en) | 2008-04-16 |
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