CN103253797B - 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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- CN103253797B CN103253797B CN201310219182.7A CN201310219182A CN103253797B CN 103253797 B CN103253797 B CN 103253797B CN 201310219182 A CN201310219182 A CN 201310219182A CN 103253797 B CN103253797 B CN 103253797B
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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 process and the reuse technology of the waste water that a kind of anodic oxidation line produces.
Background technology
Anodic oxidation aluminium sheet is widely used in the 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.
Along with the increase day by day of Taihu Lake basin environmental protection pressure; the discharge of wastewater that this region anodic oxidation line produces must with reference to the special emission limit of table 3 water pollutant in " plating pollutant emission standard " (GB21900-2008), and this has higher requirement to minimizing discharge of wastewater and treatment technology.
At present, this type of enterprise mostly by carrying out reuse after end-o f-pipe-control to waste water, its cost and difficulty larger.
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 a large amount of washing waste waters can be produced before and after each procedure, conventional waste water process and reuse technology are that factory effluent classification is discharged to waste water processing station, suitable water source to carry out after pre-treatment penetration depth treatment system (as: biochemistry+UF+RO) again, and water outlet adds in the former water making pure water again.Be not suitable for the waste water qualified discharge after treatment of reuse.Traditional treatment process is loaded down with trivial details, tediously long, and investment is large, complex management.
Summary of the invention
In order to overcome above-mentioned defect, 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 is by after online for waste water reuse, wastewater discharge greatly reduces, and the waste water of discharge does not need process of classifying again, after only needing biochemical treatment, the investment of wastewater treatment and reuse and working cost are reduced all greatly.
The present invention in order to the technical scheme solving 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 stings after washing, first desmut, first desmut after washing, chemical rightenning, chemical rightenning after washing, second desmut, second desmut after washing, washing before anodic oxidation, anodic oxidation, anodic oxidation after washing, dyeing pre-treatment and dyeing, dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, on described anodic oxidation line, waste water online treatment reuse technology is provided with the first online recycling processing system, second online recycling processing system and nickel-containing waste water treatment for reuse system, wherein,
Described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung after washing water, alkali is stung the overflow water of after washing through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds adjustment by soda acid, the management and control index of the described first online recycling processing system is: pH:2 ~ 8, specific conductivity: <4ms/cm;
Stinging tank liquor due to alkali is sodium hydroxide, first desmut tank liquor is nitric acid, described first online recycling processing system is that utilize alkali to sting sodium hydroxide that after washing brings into and the first desmut are washed the nitric acid brought into and neutralized, if pH value does not reach claimed range, adds liquid caustic soda or sulfuric acid regulates.
Described second online recycling processing system is overflow water reuse to the second desmut after washing water will washed before anodic oxidation, by 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 regulates by adding alkali;
Pure water is adopted to clean before and after anodic oxidation, effluent quality specific conductivity <2000 μ s/cm, the washing together that pH value >2(is the poorest), and chemical rightenning after washing and the second desmut after washing water quality requirement specific conductivity <4000 μ s/cm, pH value >2.Therefore, this second online recycling processing system cleans before anodic oxidation after rinse water reuse to the second desmut, and after anodic oxidation, rinse water reuse after filtering meets production requirement to chemical rightenning water for cleaning.
Described nickel-containing waste water treatment for reuse system is that the overflow water of water-soluble sealing of hole after washing is pumped into two-stage ion exchange system after collecting, and water outlet direct reuse is to water-soluble sealing of hole after washing water.
The present invention in order to the further technical scheme solving its technical problem and adopt is:
Say further, described first online recycling processing system is provided with the first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of described first desmut after washing is collected in described first gathering barrel, described first gathering barrel water outlet stings after washing water by Cemented filling to alkali, and the first gathering barrel and the described alkali pipeline stung between after washing water are provided with described first recycle pump, the overflow water that described alkali stings after washing is collected into described second gathering barrel, described pH regulator is carried out in described second gathering barrel, described second gathering barrel is connected to described sand-bed filter by pipeline, and the pipeline between described second gathering barrel and described sand-bed filter is provided with described second recycle pump, described sand-bed filter water outlet is by Cemented filling extremely described first desmut after washing water.
Say further, 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, described pH regulator is carried out in described 3rd gathering barrel, described 3rd gathering barrel is connected to described strainer by pipeline, and the pipeline between described 3rd gathering barrel and described strainer is provided with described 3rd recycle pump, described strainer water outlet is by Cemented filling extremely described chemical rightenning after washing water.
Say further, described nickel-containing waste water treatment for reuse system is provided with the 4th gathering barrel, 4th recycle pump, primary ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described 4th gathering barrel, described 4th gathering barrel is connected to described primary ion exchange system by pipeline, pipeline between described 4th gathering barrel and described primary ion exchange system is provided with described 4th recycle pump, described primary ion exchange system is connected to described secondary ion exchange system by pipeline, the water outlet of described secondary ion exchange system is by Cemented filling extremely described water-soluble sealing of hole after washing water.
The invention has the beneficial effects as follows: on anodic oxidation line of the present invention, waste water online treatment reuse technology on anodic oxidation line, arranges the first online recycling processing system, the second online recycling processing system and nickel-containing waste water treatment for reuse system to reduce wastewater discharge, technology of middle water recycle is combined with enterprise production line, accomplish online recycling, decrease the discharge of wastewater of production line, reduce scale wastewater treatment cost, the online reuse of waste water, reduces production cost, improves cleaner production degree.
Accompanying drawing explanation
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 nickel-containing waste water treatment for reuse system diagram of the present invention.
Embodiment
Below by way of specific specific examples, the specific embodiment of the present invention is described, those of ordinary skill in the art understand advantage of the present invention and effect easily by content disclosed in the present specification.
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 stings after washing, first desmut, first desmut after washing, chemical rightenning, chemical rightenning after washing, second desmut, second desmut after washing, washing before anodic oxidation, anodic oxidation, anodic oxidation after washing, dyeing pre-treatment and dyeing, dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, on described anodic oxidation line, waste water online treatment reuse technology is provided with the first online recycling processing system, second online recycling processing system and nickel-containing waste water treatment for reuse system, wherein,
Described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung after washing water, alkali is stung the overflow water of after washing through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds adjustment by soda acid, the management and control index of the described first online recycling processing system is: pH:2 ~ 8, specific conductivity: <4ms/cm, turbidity: limpid;
Described second online recycling processing system is overflow water reuse to the second desmut after washing water will washed before anodic oxidation, by 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 regulates by adding alkali;
Described nickel-containing waste water treatment for reuse system is that the overflow water of water-soluble sealing of hole after washing is pumped into two-stage ion exchange system after collecting, and water outlet direct reuse is to water-soluble sealing of hole after washing water.
Wherein, described first online recycling processing system is provided with the first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of described first desmut after washing is collected in described first gathering barrel, described first gathering barrel water outlet stings after washing water by Cemented filling to alkali, and the first gathering barrel and the described alkali pipeline stung between after washing water are provided with described first recycle pump, the overflow water that described alkali stings after washing is collected into described second gathering barrel, described pH regulator is carried out in described second gathering barrel, described second gathering barrel is connected to described sand-bed filter by pipeline, and the pipeline between described second gathering barrel and described sand-bed filter is provided with described second recycle pump, described sand-bed filter water outlet is by Cemented filling extremely described first desmut after washing water.
Wherein, 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, described pH regulator is carried out in described 3rd gathering barrel, described 3rd gathering barrel is connected to described strainer by pipeline, and the pipeline between described 3rd gathering barrel and described strainer is provided with described 3rd recycle pump, described strainer water outlet is by Cemented filling extremely described chemical rightenning after washing water.This second online recycling processing system needs the filter core or the filter bag that regularly replace strainer.
Wherein, described nickel-containing waste water treatment for reuse system is provided with the 4th gathering barrel, 4th recycle pump, primary ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described 4th gathering barrel, described 4th gathering barrel is connected to described primary ion exchange system by pipeline, pipeline between described 4th gathering barrel and described primary ion exchange system is provided with described 4th recycle pump, described primary ion exchange system is connected to described secondary ion exchange system by pipeline, the water outlet of described secondary ion exchange system is by Cemented filling extremely described water-soluble sealing of hole after washing water.The resin of the ion exchange system of this nickel-containing waste water treatment for reuse system needs periodic replacement.
Stinging tank liquor due to alkali is sodium hydroxide, first desmut tank liquor is nitric acid, described first online recycling processing system is that utilize alkali to sting sodium hydroxide that after washing brings into and the first desmut are washed the nitric acid brought into and neutralized, if pH value does not reach claimed range, adds liquid caustic soda or sulfuric acid regulates.PH value 5 ~ 7 time, in water, aluminum ion aluminium hydroxide form can filter removal.Along with alkali stings the increase of groove, the first desmut and the acid-alkali accommodation amount of bringing into, washing electrical conductivity of water will have the trend of rising, prescribing a time limit when reaching the upper of management and control value, now after washing being stung to alkali, the first desmut after washing carries out emissions groove, again adding new water and again circulate.In described first online recycling processing system, water-cleaning overflow amount controls at 2 ~ 4t/h, changes water frequency and is about 1 times/day, sand-bed filter backwash frequency 2 times/day, each 5 ~ 10 minutes, each anti-scouring water 0.5 ~ 1 ton.
Pure water is adopted to clean before and after anodic oxidation, effluent quality specific conductivity <2000 μ s/cm, the washing together that pH value >2(is the poorest), and chemical rightenning after washing and the second desmut after washing water quality requirement specific conductivity <4000 μ s/cm, pH value >2.Therefore, this second online recycling processing system cleans before anodic oxidation after rinse water reuse to the second desmut, and after anodic oxidation, rinse water reuse after filtering meets production requirement to chemical rightenning water for cleaning.
Claims (4)
1. waste water online treatment reuse technology on an anodic oxidation line, described anodic oxidation line successively comprises following operation: alkali is stung, alkali stings after washing, first desmut, first desmut after washing, chemical rightenning, chemical rightenning after washing, second desmut, second desmut after washing, washing before anodic oxidation, anodic oxidation, anodic oxidation after washing, dyeing pre-treatment and dyeing, dyeing after washing, water-soluble sealing of hole, water-soluble sealing of hole after washing, it is characterized in that, on described anodic oxidation line, waste water online treatment reuse technology is provided with the first online recycling processing system, second online recycling processing system and nickel-containing waste water treatment for reuse system, wherein,
Described first online recycling processing system is that overflow water reuse to the alkali of the first desmut after washing is stung after washing water, alkali is stung the overflow water of after washing through the pH regulator desmut of reuse to the first after filtering after washing water again, wherein, pH regulator adds adjustment by soda acid, the management and control index of the described first online recycling processing system is: pH:2 ~ 8, specific conductivity: <4mS/cm;
Described second online recycling processing system is overflow water reuse to the second desmut after washing water will washed before anodic oxidation, by 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 regulates by adding alkali;
Described nickel-containing waste water treatment for reuse system is that the overflow water of water-soluble sealing of hole after washing is pumped into two-stage ion exchange system after collecting, and water outlet direct reuse is to water-soluble sealing of hole after washing water.
2. waste water online treatment reuse technology on anodic oxidation line as claimed in claim 1, it is characterized in that, described first online recycling processing system is provided with the first gathering barrel, first recycle pump, second gathering barrel, second recycle pump and sand-bed filter, the overflow water of described first desmut after washing is collected in described first gathering barrel, the water outlet of described first gathering barrel stings after washing water by Cemented filling to alkali, and the first gathering barrel and the described alkali pipeline stung between after washing water are provided with described first recycle pump, the overflow water that described alkali stings after washing is collected into described second gathering barrel, described pH regulator is carried out in described second gathering barrel, described second gathering barrel is connected to described sand-bed filter by pipeline, and the pipeline between described second gathering barrel and described sand-bed filter is provided with described second recycle pump, the water outlet of described sand-bed filter is by Cemented filling extremely described first desmut after washing water.
3. waste water online treatment reuse technology on anodic oxidation line as claimed in claim 1, it is characterized in that, described second online recycling processing system is provided with the 3rd gathering barrel, 3rd recycle pump and strainer, the overflow water of described anodic oxidation after washing is collected into the 3rd gathering barrel, described pH regulator is carried out in described 3rd gathering barrel, described 3rd gathering barrel is connected to described strainer by pipeline, and the pipeline between described 3rd gathering barrel and described strainer is provided with described 3rd recycle pump, the water outlet of described strainer is by Cemented filling extremely described chemical rightenning after washing water.
4. waste water online treatment reuse technology on anodic oxidation line as claimed in claim 1, it is characterized in that, described nickel-containing waste water treatment for reuse system is provided with the 4th gathering barrel, 4th recycle pump, primary ion exchange system and secondary ion exchange system, the overflow water of water-soluble sealing of hole after washing is collected into described 4th gathering barrel, described 4th gathering barrel is connected to described primary ion exchange system by pipeline, pipeline between described 4th gathering barrel and described primary ion exchange system is provided with described 4th recycle pump, described primary ion exchange system is connected to described secondary ion exchange system by pipeline, the water outlet of described secondary ion exchange system is by Cemented filling extremely described water-soluble sealing of hole after washing water.
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| CN103952741B (en) * | 2014-04-17 | 2016-04-27 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Aluminium alloy anode oxide line treatment process |
| CN105803506B (en) * | 2016-03-28 | 2018-10-02 | 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 treatment agent recovery system in face of ammonium four-in-one sand |
| CN105821463B (en) * | 2016-03-28 | 2018-10-02 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | Free-floride is without treatment agent and its use in face of ammonium four-in-one sand |
| 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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