CN101786746A - Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid - Google Patents
Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid Download PDFInfo
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- CN101786746A CN101786746A CN 201010122053 CN201010122053A CN101786746A CN 101786746 A CN101786746 A CN 101786746A CN 201010122053 CN201010122053 CN 201010122053 CN 201010122053 A CN201010122053 A CN 201010122053A CN 101786746 A CN101786746 A CN 101786746A
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Abstract
The invention relates to a treatment method of industrial waste liquid and discloses a process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid. The process is mainly characterized by comprising the following steps of: firstly, adding a proper amount of carbonate mineral powder into aluminum-containing acid cleaning waste liquid to perform a replacement reaction, secondly, adding aluminum-containing alkaline cleaning waste liquid into the mixture for neutralization, and finally, separating the mixture to ensure that the waste liquid is discharged after reaching standards, wherein the waste residues are discharged as environment-friendly inorganic insoluble matters or serve as raw materials for producing aluminum. Therefore, the method has the characteristics of using cheap and easily-obtained carbonate ores and all the processed alkaline cleaning waste liquid, normally treating and separating the formed matters, greatly reducing treating cost and solving the technical problem of treating the aluminum-containing acid cleaning and alkaline cleaning waste liquid of small enterprises in the field, and has the advantages of scientific and rational process design, advancement and practicality, economy, obvious social effect and the like.
Description
Technical field
The invention belongs to the industrial effluent treatment process, relate to a kind of aluminium base pickling and alkali-washing waste liquid treatment process.
Background technology
When aluminium base carries out surface treatment; need carry out alkali cleaning oil removing and processes such as electrolyzing and coarsening, anodic oxidation; the aluminic acid that contains that produces the PH1.0-1.6 that contains aluminium alkali-washing waste liquid and several times volume of a large amount of PH12.5-13.0 is thus washed waste liquid, presses the enviromental protection law regulation, must carry out liquid waste disposal.
Present treatment process mainly contains: (1) will contain that aluminic acid is washed and alkali-washing waste liquid mixes, add liquid caustic soda or other alkaline matters again, add unslaked lime etc. in case of necessity and make flocculating aids, adjust to pH value 6-9, separation, and discharge of wastewater, the filter cake of generation is as refuse treatment; (2) will contain aluminic acid and wash waste liquid, alkali-washing waste liquid removal of impurities respectively, mix, and add alkaline matter then and be neutralized to pH value 6-9, separate, discharge of wastewater, the aluminum hydroxide filter cake of formation is as the raw material of producing aluminium salt or pseudo-boehmite etc.
The major defect of above-mentioned treatment process (1) is: the processing cost height, and generation has a large amount of new sludge garbages.As to producing 3000 ten thousand m per year
2The factory of PS version, annual liquid waste disposal is taken at 6,000,000 yuan～1,200 ten thousand yuan, and the mud of generation is at 10,000～1.5 ten thousand steres.
Yes well selects for scale enterprise for treatment process (2), as to producing 3000 ten thousand m per year
2The factory of PS version, although the processing costs of waste liquid is up to 6,000,000 yuan～1,200 ten thousand yuan, but simultaneously recyclable 1500～2000 tons aluminium hydroxide, this aluminium hydroxide purity height, further processing gets final product the products such as pseudo-boehmite of production high added value, have very high social benefit, economic benefit, can remedy the handling of considerable part.
Above-mentioned two kinds of treatment processs, because processing costs is big, investment is high for small-sized manufacturing enterprise, callable aluminium hydroxide amount again seldom, no recovery value is not suitable for using this method.
At present, for small-sized manufacturing enterprise, simple aluminium base pickling and the alkali-washing waste liquid treatment process of seeking a kind of cheapness are particularly necessary.
Summary of the invention
The contriver is in the Social surveys practical activity, find that traditional treatment process to aluminium base spent pickle liquor and alkali-washing waste liquid exists inapplicable defective to most of small business, and small business still has active demand to the easy aluminium base spent pickle liquor and the alkali-washing waste liquid treatment process of cheapness, through researching and analysing, explore repeatedly, purpose is to provide the treatment process of a kind of aluminium base pickling and alkali-washing waste liquid, can accomplish farthest to reduce processing costs, suddenly most of small business is required, be fit to most enterprises and adopt, make similar small business also have the ability to carry out this liquid waste disposal.
In order to realize task of the present invention, the technical solution used in the present invention provides a kind of aluminium base pickling and alkali-washing waste liquid treatment process, take following flow process: wash an amount of carbonate breeze mixing of adding in the waste liquid at all processed aluminic acid that contains earlier, carry out replacement(metathesis)reaction, make pH value reach 3-5, and fully stir, discharge carbonic acid gas; Add whole processed aluminium alkali-washing waste liquids that contain again and carry out neutralization reaction, make the pH value reach 6～9, the suspension liquid that forms aluminium hydroxide indissoluble thing is separated, isolate waste water and aluminium hydroxide filter cake.
In above-mentioned technology, earlier wash and add an amount of carbonate breeze in the waste liquid all containing aluminic acid, make hydrochloric acid wherein or/and sulfuric acid carries out replacement(metathesis)reaction with it, wash waste liquid thereby handle the aluminic acid that contains that a part measures; Wash in waste liquid and the carbonate breeze reaction process and should constantly stir containing aluminic acid, so that the carbonic acid gas that produces is fully overflowed; Add the consumption of carbonate breeze, the pH value of looking the spent pickle liquor of handling carries out budget, or according to pH value measured value in the replacement(metathesis)reaction is adjusted, and the processed aluminic acid that contains is washed waste liquid and is contained the aluminium alkali-washing waste liquid and exhausts and be advisable guaranteeing; Wherein the oxalate of Sheng Chenging, phosphoric acid salt and still unreacted completely indissoluble thing rigid particles such as carbonate when separating, play filtrating aid function, can realize liquid-solid separation smoothly.
This aluminium base pickling of the present invention and alkali-washing waste liquid treatment process had both utilized the cheap carbonate breeze of easily getting, and had all utilized the processed aluminium alkali-washing waste liquid that contains again; Both realized containing the normal processing that aluminic acid is washed waste liquid and contained the aluminium alkali-washing waste liquid, can realize separating smoothly to forming thing, greatly reduce processing cost, the waste residue that produces is the indissoluble thing of environmental sound, waste water reaches emission standard, solved for a long time both at home and abroad at the insoluble technical barrier in this field, technological design is scientific and reasonable, and is advanced practical; Has the important social benefit, environmental benefit and economic benefit.
Description of drawings
Fig. 1 represents the process flow sheet of aluminium base pickling of the present invention and alkali-washing waste liquid treatment process.
Embodiment
Reach embodiment in conjunction with the accompanying drawings, further specify the idiographic flow step of technology of the present invention.
Aluminium base pickling of the present invention and alkali-washing waste liquid treatment process embodiment referring to Fig. 1, adopt following process step: wash an amount of carbonate breeze of adding in the waste liquid to the aluminic acid that contains of whole amounts earlier, mix and carry out replacement(metathesis)reaction, and omnidistance constantly the stirring fully discharged CO
2, make PH reach 3-5; What add whole amounts again contains the aluminium alkali-washing waste liquid, mixes and carries out neutralization reaction, makes PH reach 6-9, and the suspension liquid that forms is implemented to separate, and isolates waste water and aluminium hydroxide filter cake.
In above-mentioned steps, wherein add carbonate breeze consumption in advance through calculating, or in the metathesis process, adjust according to detecting pH value, with guarantee with processed whole contain the aluminium alkali-washing waste liquid and contain aluminic acid wash liquid waste disposal and exhaust.When the aluminic acid that contains of the PH1.0-1.6 of volume 20-30 cubic meter is washed waste liquid, when containing aluminium alkali-washing waste liquid volume and being 3-5 cubic meter PH12.5-13.0, wash limestone powder or magnesite breeze or other carbonate breeze that adds weight 0.1-1 ton in the waste liquid to containing aluminic acid earlier, mineral powder granular 1mm-400 order, uniform mixing, carry out replacement(metathesis)reaction, treat that PH reaches 3-5 and stops to add the carbonate breeze, fully stir, after treating that carbon dioxide is overflowed fully, add the pending aluminium alkali-washing waste liquid that contains again, the uniform mixing neutralization reaction makes pH value reach 6-9.The suspension liquid that produces separates through the pressure filter press filtration, and organic clearance is more than 80% in the filtrate, and other are soluble salts such as sodium-chlor, calcium chloride; The main aluminium hydroxide of filter cake can be used as raw material or the qualified discharge of producing aluminium salt.
This aluminium base pickling of the present invention and alkali-washing waste liquid treatment process, through in Lekai group PS version aluminium base pickle liquor, alkali-washing waste liquid pilot scale being processed, show process route science of the present invention, advanced person, normal operation, having treatment process now with Lekai group compares, only expense of raw materials is more than 50% can to save handling, and the aluminium hydroxide mud of generation reduces 30%～50%, deeply is subjected to pilot scale enterprise favorable comment.
Claims (1)
1. aluminium base pickling and alkali-washing waste liquid treatment process, it is characterized in that adopting following technical process: wash an amount of carbonate breeze of adding in the waste liquid at whole processed aluminic acids that contain earlier, mix and carry out replacement(metathesis)reaction, make pH value reach 3-5, and fully stir and discharge carbonic acid gas; Add whole processed aluminium alkali-washing waste liquids that contain again and carry out neutralization reaction, make pH value reach 6～9, the suspension liquid that forms aluminium hydroxide indissoluble thing is separated, isolate waste water and aluminium hydroxide filter cake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010122053 CN101786746A (en) | 2010-03-05 | 2010-03-05 | Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010122053 CN101786746A (en) | 2010-03-05 | 2010-03-05 | Process for treating aluminum substrate acid cleaning and alkaline cleaning waste liquid |
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| CN101786746A true CN101786746A (en) | 2010-07-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627362A (en) * | 2012-04-10 | 2012-08-08 | 乐凯华光印刷科技有限公司 | Process for recycling aluminum hydroxide from acid wastewater containing aluminum ions |
| CN102642945A (en) * | 2012-04-10 | 2012-08-22 | 乐凯华光印刷科技有限公司 | Technique for recycling aluminum hydroxide from waste liquid for acid washing and alkaline washing aluminum-based material |
| CN109336319A (en) * | 2018-09-20 | 2019-02-15 | 河南慧锦药业有限公司 | A kind of comprehensive pretreatment method of the high concentration containing aniline waste water and the waste water containing benzaldehyde |
| CN111196659A (en) * | 2018-11-16 | 2020-05-26 | 沈阳蓝星清洗有限公司 | Industrial cleaning waste liquid treatment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624243A (en) * | 2009-08-05 | 2010-01-13 | 申明乐 | Treatment technology of acid washing and alkaline washing waste liquid of aluminum substrate |
-
2010
- 2010-03-05 CN CN 201010122053 patent/CN101786746A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101624243A (en) * | 2009-08-05 | 2010-01-13 | 申明乐 | Treatment technology of acid washing and alkaline washing waste liquid of aluminum substrate |
Non-Patent Citations (1)
| Title |
|---|
| 《工业废水处理》 19891031 崔志瀓 等 第三章酸性废水处理和回收利用 , 1 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627362A (en) * | 2012-04-10 | 2012-08-08 | 乐凯华光印刷科技有限公司 | Process for recycling aluminum hydroxide from acid wastewater containing aluminum ions |
| CN102642945A (en) * | 2012-04-10 | 2012-08-22 | 乐凯华光印刷科技有限公司 | Technique for recycling aluminum hydroxide from waste liquid for acid washing and alkaline washing aluminum-based material |
| CN109336319A (en) * | 2018-09-20 | 2019-02-15 | 河南慧锦药业有限公司 | A kind of comprehensive pretreatment method of the high concentration containing aniline waste water and the waste water containing benzaldehyde |
| CN111196659A (en) * | 2018-11-16 | 2020-05-26 | 沈阳蓝星清洗有限公司 | Industrial cleaning waste liquid treatment method |
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Application publication date: 20100728 |