CN103253797A - Online treatment and recycling technique for waste water on anode oxidization production line - Google Patents
Online treatment and recycling technique for waste water on anode oxidization production line Download PDFInfo
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- CN103253797A CN103253797A CN2013102191827A CN201310219182A CN103253797A CN 103253797 A CN103253797 A CN 103253797A CN 2013102191827 A CN2013102191827 A CN 2013102191827A CN 201310219182 A CN201310219182 A CN 201310219182A CN 103253797 A CN103253797 A CN 103253797A
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Abstract
The invention discloses an online treatment and recycling technique for waste water on an anode production line. According to the online treatment and recycling technique, a first online recycling and treatment system, a second online recycling and treatment system and a nickel-containing waste water treatment and recycling system are arranged, wherein the first online recycling and treatment system is used for recycling overflowing water generated in washing after primary black membrane stripping to water for washing after chemical etching, adjusting pH of overflowing water generated in washing after chemical etching, filtering the overflowing water and then recycling the filtered overflowing water into water for washing after primary black membrane stripping; the second online recycling and treatment system is used for recycling overflowing water generated in washing before anode oxidization into water for washing after secondary black membrane stripping, adjusting pH of the overflowing water generated in washing after anode oxidization, filtering the overflowing water and then recycling the filtered overflowing water into water for washing after chemical polishing; and the nickel-containing waste water treatment and recycling system is used for collecting overflowing water generated in washing after water-soluble hole sealing, pumping the overflowing water into a two-stage ion exchange system, and recycling effluent water into water for washing after the water-soluble hole sealing. According to the online treatment and recycling technique for waste water of anode oxidization production line, the emission amount of the waste water from the production line, can be reduced, the treatment cost for waste water of enterprises can be lowered, the waste water is recycled in an online manner, the production cost can be lowered, and the clean production level can be improved.
Description
Technical field
The invention belongs to the technical field of waste water processing of environmental engineering, be specifically related to a kind of processing and reuse technology of waste water of anodic oxidation line generation.
Background technology
The anodic oxidation aluminium sheet is widely used in industries such as mechanical component, aircraft automobile parts, precision instrument and radio component parts, building decoration, machine casing, lamp lighting, consumer electronics, artwork, household electrical appliance, indoor decoration, label, furniture, automobile decoration.
Increase day by day along with the Taihu Lake basin environmental protection pressure; the special emission limit of table 3 water pollutant in the discharge of wastewater palpus reference " plating pollutant emission standard " (GB21900-2008) that this zone anodic oxidation line produces, this has higher requirement to reducing discharge of wastewater and treatment technology.
At present, this type of enterprise handles the back reuse by waste water being carried out end mostly, and its cost and difficulty are bigger.
The production technique of typical anode oxidation is as follows: aluminum component → pre-treatment → chemical rightenning → anodic oxidation → dyeing → sealing of hole → finished product.Wherein, all can produce a large amount of washing waste water before and after each procedure, tradition wastewater treatment and reuse technology are that the factory effluent classification is discharged to waste water processing station, suitable water source carries out entering after the pre-treatment advanced treatment system again, and (as: biochemistry+UF+RO), water outlet adds in the former water of making pure water again.The waste water that is not suitable for reuse is qualified discharge after treatment.Traditional treatment process is loaded down with trivial details, tediously long, and investment is big, complex management.
Summary of the invention
In order to overcome above-mentioned defective, the invention provides waste water online treatment reuse technology on a kind of anodic oxidation line, on this anodic oxidation line waste water online treatment reuse technology with the online reuse of waste water after, wastewater discharge significantly reduces, and the waste water of discharging does not need the processing of classifying again, only need to get final product after the biochemical treatment, the investment of wastewater treatment and reuse and working cost are all reduced greatly.
The present invention for the technical scheme that solves its technical problem and adopt is:
Waste water online treatment reuse technology on a kind of anodic oxidation line, described anodic oxidation line successively comprises following operation: alkali is stung, alkali is stung after washing, first desmut, the first desmut after washing, chemical rightenning, the chemical rightenning after washing, second desmut, the second desmut after washing, washing before the anodic oxidation, anodic oxidation, the anodic oxidation after washing, dyeing pre-treatment and dyeing, the dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, waste water online treatment reuse technology is provided with the first online recycling processing system on the described anodic oxidation line, the second online recycling processing system and nickel-containing waste water are handled reclaiming system, wherein
The described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung the after washing water, the overflow water of alkali being stung after washing is through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds by soda acid to be regulated, the management and control index of the described first online recycling processing system is: pH:2～8, specific conductivity:＜4ms/cm;
Because it is sodium hydroxide that alkali is stung tank liquor, the first desmut tank liquor is nitric acid, the described first online recycling processing system is to utilize alkali to sting the nitric acid neutralization that sodium hydroxide that after washing brings into and the washing of first desmut are brought into, does not then add liquid caustic soda or sulfuric acid adjusting if pH value reaches claimed range.
The described second online recycling processing system is overflow water reuse to the second desmut after washing water that will wash before the anodic oxidation, with the overflow water of anodic oxidation after washing through pH regulator to neutrality again reuse after filtering to chemical rightenning after washing water, wherein, pH regulator is regulated by adding alkali;
Adopt pure water to clean effluent quality specific conductivity＜2000 μ s/cm, pH value before and after the anodic oxidation〉the poorest the washing together of 2(), and chemical rightenning after washing and second desmut after washing water quality requirement specific conductivity＜4000 μ s/cm, the pH value〉2.Therefore, this second online recycling processing system cleans behind rinse water reuse to the second desmut before with anodic oxidation, and rinse water reuse after filtering to chemical rightenning water for cleaning satisfies production requirement after the anodic oxidation.
It is that overflow water with water-soluble sealing of hole after washing pumps into the two-stage ion exchange system after collecting that described nickel-containing waste water is handled reclaiming system, and the water outlet direct reuse is to water-soluble sealing of hole after washing water.
The present invention for the further technical scheme that solves its technical problem and adopt is:
Say further, the described first online recycling processing system is provided with first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of the described first desmut after washing is collected in described first gathering barrel, the described first gathering barrel water outlet is stung the after washing water by pipe-line transportation to alkali, and the pipeline that first gathering barrel and described alkali are stung between the after washing water is provided with described first recycle pump, the overflow water that described alkali is stung after washing is collected into described second gathering barrel, in described second gathering barrel, carry out described pH regulator, described second gathering barrel by pipe connection to described sand-bed filter, and the pipeline between described second gathering barrel and the described sand-bed filter is provided with described second recycle pump, described sand-bed filter water outlet by pipe-line transportation to the described first desmut after washing water.
Say further, the described second online recycling processing system is provided with the 3rd gathering barrel, the 3rd recycle pump and strainer, the overflow water of described anodic oxidation after washing is collected into the 3rd gathering barrel, in described the 3rd gathering barrel, carry out described pH regulator, described the 3rd gathering barrel by pipe connection to described strainer, and the pipeline between described the 3rd gathering barrel and the described strainer is provided with described the 3rd recycle pump, described strainer water outlet by pipe-line transportation to described chemical rightenning after washing water.
Say further, described nickel-containing waste water is handled reclaiming system and is provided with the 4th gathering barrel, the 4th recycle pump, one-level ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described the 4th gathering barrel, described the 4th gathering barrel by pipe connection to described one-level ion exchange system, pipeline between described the 4th gathering barrel and the described one-level ion exchange system is provided with described the 4th recycle pump, described one-level ion exchange system by pipe connection to described secondary ion exchange system, the water outlet of described secondary ion exchange system by pipe-line transportation to described water-soluble sealing of hole after washing water.
The invention has the beneficial effects as follows: waste water online treatment reuse technology is at the anodic oxidation line the first online recycling processing system, the second online recycling processing system and nickel-containing waste water processing reclaiming system to be set to reduce wastewater discharge on the anodic oxidation line of the present invention, technology of middle water recycle is combined with the enterprise production line, accomplish online recovery, reduced the discharge of wastewater of production line, reduced the scale wastewater treatment cost, the online reuse of waste water has reduced production cost, has improved the cleaner production degree.
Description of drawings
Fig. 1 is the of the present invention first online recycling processing system figure;
Fig. 2 is the of the present invention second online recycling processing system figure;
Fig. 3 is that nickel-containing waste water of the present invention is handled reclaiming system figure.
Embodiment
Below by specific specific examples explanation the specific embodiment of the present invention, those of ordinary skills understand advantage of the present invention and effect easily by the content that this specification sheets discloses.
Embodiment: waste water online treatment reuse technology on a kind of anodic oxidation line, described anodic oxidation line successively comprises following operation: alkali is stung, alkali is stung after washing, first desmut, the first desmut after washing, chemical rightenning, the chemical rightenning after washing, second desmut, the second desmut after washing, washing before the anodic oxidation, anodic oxidation, the anodic oxidation after washing, dyeing pre-treatment and dyeing, the dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, waste water online treatment reuse technology is provided with the first online recycling processing system on the described anodic oxidation line, the second online recycling processing system and nickel-containing waste water are handled reclaiming system, wherein
The described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung the after washing water, the overflow water of alkali being stung after washing is through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds by soda acid to be regulated, the management and control index of the described first online recycling processing system is: pH:2～8, specific conductivity:＜4ms/cm, turbidity: limpid;
The described second online recycling processing system is overflow water reuse to the second desmut after washing water that will wash before the anodic oxidation, with the overflow water of anodic oxidation after washing through pH regulator to neutrality again reuse after filtering to chemical rightenning after washing water, wherein, pH regulator is regulated by adding alkali;
It is that overflow water with water-soluble sealing of hole after washing pumps into the two-stage ion exchange system after collecting that described nickel-containing waste water is handled reclaiming system, and the water outlet direct reuse is to water-soluble sealing of hole after washing water.
Wherein, the described first online recycling processing system is provided with first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of the described first desmut after washing is collected in described first gathering barrel, the described first gathering barrel water outlet is stung the after washing water by pipe-line transportation to alkali, and the pipeline that first gathering barrel and described alkali are stung between the after washing water is provided with described first recycle pump, the overflow water that described alkali is stung after washing is collected into described second gathering barrel, in described second gathering barrel, carry out described pH regulator, described second gathering barrel by pipe connection to described sand-bed filter, and the pipeline between described second gathering barrel and the described sand-bed filter is provided with described second recycle pump, described sand-bed filter water outlet by pipe-line transportation to the described first desmut after washing water.
Wherein, the described second online recycling processing system is provided with the 3rd gathering barrel, the 3rd recycle pump and strainer (filter core or filter bag type), the overflow water of described anodic oxidation after washing is collected into the 3rd gathering barrel, in described the 3rd gathering barrel, carry out described pH regulator, described the 3rd gathering barrel by pipe connection to described strainer, and the pipeline between described the 3rd gathering barrel and the described strainer is provided with described the 3rd recycle pump, described strainer water outlet by pipe-line transportation to described chemical rightenning after washing water.This second online recycling processing system need regularly replace filter core or the filter bag of strainer.
Wherein, described nickel-containing waste water is handled reclaiming system and is provided with the 4th gathering barrel, the 4th recycle pump, one-level ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described the 4th gathering barrel, described the 4th gathering barrel by pipe connection to described one-level ion exchange system, pipeline between described the 4th gathering barrel and the described one-level ion exchange system is provided with described the 4th recycle pump, described one-level ion exchange system by pipe connection to described secondary ion exchange system, the water outlet of described secondary ion exchange system by pipe-line transportation to described water-soluble sealing of hole after washing water.The resin that this nickel-containing waste water is handled the ion exchange system of reclaiming system need regularly replace.
Because it is sodium hydroxide that alkali is stung tank liquor, the first desmut tank liquor is nitric acid, the described first online recycling processing system is to utilize alkali to sting the nitric acid neutralization that sodium hydroxide that after washing brings into and the washing of first desmut are brought into, does not then add liquid caustic soda or sulfuric acid adjusting if pH value reaches claimed range.In pH value 5～7 o'clock, aluminum ion can the aluminium hydroxide form filters and removes in the water.Sting the increase of groove, first desmut and the acid-alkali accommodation amount of bringing into along with alkali, the washing electrical conductivity of water will have the trend of rising, when reaching going up in limited time of management and control value, this moment to alkali sting after washing, the first desmut after washing carries out emissions groove, add new water again and circulate again.In the described first online recycling processing system, the control of washing spillway discharge is changed the water frequency and is about 1 time/day at 2～4t/h, sand-bed filter backwash frequency 2 times/day, each 5～10 minutes, 0.5～1 ton of each backwash water.
Adopt pure water to clean effluent quality specific conductivity＜2000 μ s/cm, pH value before and after the anodic oxidation〉the poorest the washing together of 2(), and chemical rightenning after washing and second desmut after washing water quality requirement specific conductivity＜4000 μ s/cm, the pH value〉2.Therefore, this second online recycling processing system cleans behind rinse water reuse to the second desmut before with anodic oxidation, and rinse water reuse after filtering to chemical rightenning water for cleaning satisfies production requirement after the anodic oxidation.
Claims (4)
1. waste water online treatment reuse technology on the anodic oxidation line, described anodic oxidation line successively comprises following operation: alkali is stung, alkali is stung after washing, first desmut, the first desmut after washing, chemical rightenning, the chemical rightenning after washing, second desmut, the second desmut after washing, washing before the anodic oxidation, anodic oxidation, the anodic oxidation after washing, dyeing pre-treatment and dyeing, the dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, it is characterized in that, waste water online treatment reuse technology is provided with the first online recycling processing system on the described anodic oxidation line, the second online recycling processing system and nickel-containing waste water are handled reclaiming system, wherein
The described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung the after washing water, the overflow water of alkali being stung after washing is through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds by soda acid to be regulated, the management and control index of the described first online recycling processing system is: pH:2～8, specific conductivity:＜4ms/cm;
The described second online recycling processing system is overflow water reuse to the second desmut after washing water that will wash before the anodic oxidation, with the overflow water of anodic oxidation after washing through pH regulator to neutrality again reuse after filtering to chemical rightenning after washing water, wherein, pH regulator is regulated by adding alkali;
It is that overflow water with water-soluble sealing of hole after washing pumps into the two-stage ion exchange system after collecting that described nickel-containing waste water is handled reclaiming system, and the water outlet direct reuse is to water-soluble sealing of hole after washing water.
2. waste water online treatment reuse technology on the anodic oxidation line as claimed in claim 1, it is characterized in that, the described first online recycling processing system is provided with first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of the described first desmut after washing is collected in described first gathering barrel, the described first gathering barrel water outlet is stung the after washing water by pipe-line transportation to alkali, and the pipeline that first gathering barrel and described alkali are stung between the after washing water is provided with described first recycle pump, the overflow water that described alkali is stung after washing is collected into described second gathering barrel, in described second gathering barrel, carry out described pH regulator, described second gathering barrel by pipe connection to described sand-bed filter, and the pipeline between described second gathering barrel and the described sand-bed filter is provided with described second recycle pump, described sand-bed filter water outlet by pipe-line transportation to the described first desmut after washing water.
3. waste water online treatment reuse technology on the anodic oxidation line as claimed in claim 1, it is characterized in that, the described second online recycling processing system is provided with the 3rd gathering barrel, the 3rd recycle pump and strainer, the overflow water of described anodic oxidation after washing is collected into the 3rd gathering barrel, in described the 3rd gathering barrel, carry out described pH regulator, described the 3rd gathering barrel by pipe connection to described strainer, and the pipeline between described the 3rd gathering barrel and the described strainer is provided with described the 3rd recycle pump, described strainer water outlet by pipe-line transportation to described chemical rightenning after washing water.
4. waste water online treatment reuse technology on the anodic oxidation line as claimed in claim 1, it is characterized in that, described nickel-containing waste water is handled reclaiming system and is provided with the 4th gathering barrel, the 4th recycle pump, one-level ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described the 4th gathering barrel, described the 4th gathering barrel by pipe connection to described one-level ion exchange system, pipeline between described the 4th gathering barrel and the described one-level ion exchange system is provided with described the 4th recycle pump, described one-level ion exchange system by pipe connection to described secondary ion exchange system, the water outlet of described secondary ion exchange system by pipe-line transportation to described water-soluble sealing of hole after washing water.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952741A (en) * | 2014-04-17 | 2014-07-30 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminum alloy anodizing line treatment process |
| CN105648496A (en) * | 2016-03-28 | 2016-06-08 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free ammonium-free four-in-one aluminum alloy sand face pretreatment process |
| CN105803506A (en) * | 2016-03-28 | 2016-07-27 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free and ammonium-free four-in-one recovery system for pretreatment chemicals of sand surface of aluminum alloy |
| CN105821463A (en) * | 2016-03-28 | 2016-08-03 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free and ammonium-free four-in-one sand finishing pretreatment agent and use method and agent recycling system thereof |
| CN107803319A (en) * | 2017-11-13 | 2018-03-16 | 林州朗坤科技有限公司 | A kind of NMP recovery purification systems and its recovery method of purification |
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| CN102795722A (en) * | 2012-08-15 | 2012-11-28 | 张宏智 | Method for treating waste water generated from surface treatment of aluminum products |
| CN103043818A (en) * | 2012-12-14 | 2013-04-17 | 苏州万科环境工程有限公司 | Waste water treating method in aluminum section bar oxidizing technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952741A (en) * | 2014-04-17 | 2014-07-30 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminum alloy anodizing line treatment process |
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| CN105648496A (en) * | 2016-03-28 | 2016-06-08 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free ammonium-free four-in-one aluminum alloy sand face pretreatment process |
| CN105803506A (en) * | 2016-03-28 | 2016-07-27 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free and ammonium-free four-in-one recovery system for pretreatment chemicals of sand surface of aluminum alloy |
| CN105821463A (en) * | 2016-03-28 | 2016-08-03 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Fluoride-free and ammonium-free four-in-one sand finishing pretreatment agent and use method and agent recycling system thereof |
| CN105648496B (en) * | 2016-03-28 | 2018-03-02 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminium alloy free-floride is without handling process in face of ammonium four-in-one sand |
| CN107803319A (en) * | 2017-11-13 | 2018-03-16 | 林州朗坤科技有限公司 | A kind of NMP recovery purification systems and its recovery method of purification |
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