CN101525168A - Glycin raffinate concentration section high-COD condensed wastewater treatment technology - Google Patents
Glycin raffinate concentration section high-COD condensed wastewater treatment technology Download PDFInfo
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- CN101525168A CN101525168A CN200910074215A CN200910074215A CN101525168A CN 101525168 A CN101525168 A CN 101525168A CN 200910074215 A CN200910074215 A CN 200910074215A CN 200910074215 A CN200910074215 A CN 200910074215A CN 101525168 A CN101525168 A CN 101525168A
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Abstract
The invention relates to chemical industry wastewater treatment technology, in particular to a glycin raffinate concentration section high-COD condensed wastewater treatment technology. The technology comprises the steps as follows: high-COD condensed wastewater produced from an ammonium chloride section passes through a transferring tank, is processed by ammonia stripping treatment in a cooling stripping tower and then enters into each section as follows through the transferring tank or enters into more than two sections synchronously for cyclic utilization as follows: (1) replacing primary water as technical water to be used in a chloroactic acid production section and used as dilution water after chloroactic acid reaction; (2) replacing the primary water as the technical water to be used in a glycin namely glycin production section and used as reaction complementary water; (3) replacing the primary water as the technical water to be used in an urotropine production section and used as the water used for confecting urotropine aqueous solution; (4) being used in an ammonium chloride production section and used as vacuum seal water of a water ring vacuum pump; and (5) being used in a boiler plant and used as the water for spraying calcium on fly ash. The invention recycles the wastewater during the technical process, saves energy source and reduces the environmental pollution.
Description
Technical field
The present invention relates to a kind of chemical industry waste water treatment process, particularly a kind of glycin raffinate concentration section high-COD condensed waste water treatment process.
Background technology
The Mono Chloro Acetic Acid ammonolysis process is produced in glycine (also the being Padil) technical process, when extractive reaction liquid, produce a large amount of mother liquors that contains methyl alcohol, this mother liquor is after rectifying tower reclaims methyl alcohol, and the rectifying tower bottoms is the aqueous solution that contains ammonium chloride, urotropine, glycine and other impurity.The rectifying tower bottoms is sent into ammonium chloride workshop section, through economic benefits and social benefits concentrate, crystallisation by cooling, filter solid ammonium chloride.Can produce a large amount of high-COD condensed waste water (COD20000mg/L in the concentration process; BOD700mg/L), belong to biochemical degradation performance extreme difference waste water, should not directly use biochemical chemical treatment method, and should preferentially carry out pre-treatment with physico-chemical process, chemical method etc.
Traditional waste water treatment process is as follows: (see figure 1)
High-COD condensed waste water is at first by the ammonium chloride in the electrolyzer electrolysis wastewater, the COD clearance reaches 28%, in equalizing tank through the absorption of Powdered Activated Carbon and the adjusting of Wingdale, after adjusting waste water pH value reaches 7-11, remaining 90% ammonia stripping is removed, this moment, COD dropped to below 10,000, waste water is through the settling bowl sedimentation, squeeze in the comprehensive adjustment pond together with sanitary sewage after the electrolysis once more, make anaerobic treatment through UASB, squeeze into the oxide treatment pond by waste water pump and carry out the bio-oxidation processing, after the back qualified discharge is filtered in the high efficiency filter pond, mud is processed into dried mud again.China is very strict to discharged volume of industrial waste water and discharge index control, and the above-mentioned glycin raffinate concentration section high-COD condensed waste water of the annual processing of a lot of companies, the capital consumes resources such as a large amount of electric energy and coal, brings very big economical load for country and enterprise.With my company is example: the glycin raffinate concentration section high-COD condensed waste water of annual processing institute current consumption reaches 2317.1 ten thousand kWh, amounts to 8109.85 tons of standard coals, has brought very big economical load to enterprise.
Summary of the invention
Purpose of the present invention just is to provide a kind of new glycin raffinate concentration section high-COD condensed waste water treatment process, technology of the present invention is with the recycle in technological process is done of high-COD condensed waste water, saved the consumption of a large amount of water, and do not influence the quality product qualification rate, saved physico-chemical process, chemical method etc. and carried out a large amount of electric energy and the manpower and materials that pre-treatment consumed, saved the energy, reduced environmental pollution.
Technical scheme of the present invention is: the high-COD condensed water that produces in the glycine production process mainly contains methyl alcohol, the ammonium chloride of trace.The high-COD condensed waste water high-COD condensed water through the processing of ammonia stripping is carried out earlier in the transfer pond the cooling stripping tower after that produces from ammonium chloride workshop section only remains micro-ammonium chloride (below 0.02%), and then enter one of following each workshop section through the transfer pond and do recycle, perhaps enter following two above workshop sections simultaneously and do recycle (what of the high-COD condensed wastewater flow rate that produces according to reality, decide and only enter a workshop section and still enter two above workshop sections simultaneously and do recycle): (1) substituting disposable water is done process water and is used for production of chloroacetic acid workshop section, as the dilution water behind the chloroacetate reaction; (2) to be used for Padil as process water be glycine production workshop section to substituting disposable water, the water that replenishes as reaction; (3) substituting disposable water is done process water and is used for urotropine production workshop section, as the preparation water of the urotropine aqueous solution; (4) be used in Production of Ammonium Chloride workshop section, as the vacuum-sealing water of water ring vacuum pump; (5) be used in boiler shop, as flyash spray calcium water.
The high-COD condensed waste water that the present invention produces from ammonium chloride workshop section can be introduced into wastewater disposal basin and temporarily store before entering the transfer pond.
Beneficial effect of the present invention is: the present invention has changed the processing mode of existing glycin raffinate concentration section high-COD condensed waste water, with the recycle in technological process of high-COD condensed waste water, saved the consumption of a large amount of water, and in the production process, the micro-ammonium chloride that high-COD condensed water is brought into is through extraction process and product separation, do not influence the quality product qualification rate, saved the sewage works physico-chemical process, chemical methods etc. are handled consumed a large amount of, coal, water equal energy source and resource, and lot of manpower and material resources, reduced the pollution that a large amount of dischargings of trade effluent cause simultaneously, thorny waste water handling problem is solved, and has reached save energy, reduce the purpose of environmental pollution.This project provides new approaches for the wastewater treatment of glycine production industry, and the problem that is solved also responded the call of national energy-saving and emission-reduction, and enterprise is developed to cleaner production, has created very big economic benefit and social benefit simultaneously.
The recycle of high-COD condensed waste water, save the process that sewage works physico-chemical process, chemical method etc. are handled, having saved the consumption of water, electricity, coal equal energy source, is example with my enterprise: amount of electricity saving annual after the technological transformation is about 1,000 ten thousand kwh, saves about 200,000 tons of water consumption.
Description of drawings
Fig. 1 is the schema of existing glycin raffinate concentration section high-COD condensed waste water treatment process
Fig. 2 is the schema of the glycin raffinate concentration section high-COD condensed waste water treatment process of the present invention
Embodiment
The invention will be further described below in conjunction with specific embodiment:
Specific embodiment, my enterprise's production plant process water every day amount: Padil reaction make up water 190-210 ton, Mono Chloro Acetic Acid water distribution quantity 110-130 ton, urotropine water distribution quantity 19-21 ton, the vacuum-sealing water yield 190-210 ton of ammonium chloride workshop water ring vacuum pump, boiler shop water 39-41 ton.Now the high-COD condensed waste water that produces from ammonium chloride workshop section stores earlier wastewater disposal basin, in the cooling stripping tower, carry out the ammonia stripping through the transfer pond then and handle the only surplus micro-ammonium chloride (below 0.02%) of the high-COD condensed water in back, and then enter one of above-mentioned each workshop section through the transfer pond and do recycle, perhaps enter two above workshop sections simultaneously and do recycle (in practice according to the high-COD condensed wastewater flow rate that produces what, decide only enter a workshop section still enter two above workshop sections simultaneously and do recycle); The generation of high-COD condensed waste water and usage quantity remain basically stable in the production process, suitably use water of part to replenish when the water yield is not enough, make high-COD condensed waste water form the recycle process.And the micro-ammonium chloride that high-COD condensed waste water is brought into still can guarantee the up-to-standard of product through extraction process and product separation.
Claims (2)
1, the treatment process of glycin raffinate concentration section high-COD condensed waste water is characterized in that, it comprises the steps:
The high-COD condensed waste water that produces from ammonium chloride workshop section carries out the cooling stripping tower earlier after the ammonia stripping handles through the transfer pond, and then enter one of following each workshop section through the transfer pond and do recycle, perhaps enter following two above workshop sections simultaneously and do recycle: (1) substituting disposable water is done process water and is used for production of chloroacetic acid workshop section, as the dilution water behind the chloroacetate reaction; (2) to be used for Padil as process water be glycine production workshop section to substituting disposable water, the water that replenishes as reaction; (3) substituting disposable water is done process water and is used for urotropine production workshop section, as the preparation water of the urotropine aqueous solution; (4) be used in Production of Ammonium Chloride workshop section, as the vacuum-sealing water of water ring vacuum pump; (5) be used in boiler shop, as flyash spray calcium water.
2, the treatment process of glycin raffinate concentration section high-COD condensed waste water according to claim 1 is characterized in that, the high-COD condensed waste water that produces from ammonium chloride workshop section was introduced into wastewater disposal basin and temporarily stores before entering the transfer pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910074215A CN101525168A (en) | 2009-04-22 | 2009-04-22 | Glycin raffinate concentration section high-COD condensed wastewater treatment technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910074215A CN101525168A (en) | 2009-04-22 | 2009-04-22 | Glycin raffinate concentration section high-COD condensed wastewater treatment technology |
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| CN101525168A true CN101525168A (en) | 2009-09-09 |
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| CN200910074215A Pending CN101525168A (en) | 2009-04-22 | 2009-04-22 | Glycin raffinate concentration section high-COD condensed wastewater treatment technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218089A (en) * | 2018-03-09 | 2018-06-29 | 浙江新安化工集团股份有限公司 | A kind of processing method of glycin waste water |
| CN108658374A (en) * | 2018-05-18 | 2018-10-16 | 宜昌金信化工有限公司 | A kind of cleaning method of glycine production waste water |
-
2009
- 2009-04-22 CN CN200910074215A patent/CN101525168A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108218089A (en) * | 2018-03-09 | 2018-06-29 | 浙江新安化工集团股份有限公司 | A kind of processing method of glycin waste water |
| CN108658374A (en) * | 2018-05-18 | 2018-10-16 | 宜昌金信化工有限公司 | A kind of cleaning method of glycine production waste water |
| CN108658374B (en) * | 2018-05-18 | 2021-06-08 | 湖北泰盛化工有限公司 | Clean treatment method of glycine production wastewater |
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Open date: 20090909 |