CN102923912B - Method for comprehensively treating sewage of chemical fiber oiling agents in production plants - Google Patents
Method for comprehensively treating sewage of chemical fiber oiling agents in production plants Download PDFInfo
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- CN102923912B CN102923912B CN201210439992.9A CN201210439992A CN102923912B CN 102923912 B CN102923912 B CN 102923912B CN 201210439992 A CN201210439992 A CN 201210439992A CN 102923912 B CN102923912 B CN 102923912B
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Abstract
The invention discloses a method for comprehensively treating sewage of chemical fiber oiling agents in production plants. The method mainly includes the following steps: mineral oil is recovered from the chemical fiber oiling agents through acidification; the acidified lower clear liquid is performed with a Fenton reaction and then enters a middle water tank to be homogenized with washing water in a workshop and run-off rain water of oiliness paths; suspended materials and small elaioplast in the homogenized sewage are removed through an air floating pool; the water discharged from the air floating pool and sanitary sewage together enter a comprehensive adjusting tank to be treated by an anaerobic baffle pool, an aerobiotic pool and a settling pool, and then outlet water can meet the B-level wastewater quality standards for discharge to municipal sewers (CJ3082-2010). The method for comprehensively treating sewage of chemical fiber oiling agents is convenient to manage and maintain, capable of adapting to large water quality fluctuation, stable and reliable in treating effect and moderate in operation cost.
Description
Technical field
The present invention relates to a kind of integrated conduct method of sewage, especially the integrated conduct method of preparation medium production plant area sewage.
Background technology
Preparation medium is one of auxiliary agent essential in synthon manufacture and spinning processing process thereof, and its effect is to make fiber have good smoothness, convergency, static resistance, meets the requirement of fiber process.Along with the development of synthetic fiber industry, synthon are produced and have been moved towards many kinds, short run, high-speed stage, need a large amount of novel finishes that coordinate with it.2011, domestic synthetic fiber annual production reached more than 3,000 ten thousand tons, year consumed approximately 300,000 tons of finishes, comprised finish for terylene, finish, polyamide fibre and finish, other finishes etc. for acrylic fibers for polypropylene fibre.Preparation medium is generally comprised of the mineral oil (white oil, machine oil) of various viscositys, emulsifying agent (alkylphenol polyoxyethylene), static inhibitor (alkylphosphonic acid carboxylic acid sylvite), smooth agent (Acrawax, polyethers), silicone oil, the anti-agent of splashing etc.These molecular weight of material are large, and mostly with various branched groups, the difficulty of biochemical degradation is quite large.Preparation medium manufacturing enterprise, in the product vessel process of washing and recycling, can produce a large amount of waste water containing preparation medium, and this kind of Wastewater Pollutant composition overwhelming majority is mineral oil.In addition, in the on-site product handling of preparation medium manufacturing enterprise, transportation, evaporating, emitting, dripping or leaking of liquid or gas is to road, and rainy oil-containing road runoff sewage, the workshop sanitary sewage synthetic or washing water and on-site that washes away generation is also the sewage that chemical plant must be processed.Generally, there is the sewage of 4 kinds of different sourcess in preparation medium production plant area: the preparation medium waste water that washing and recycling product vessel produces, synthetic workshop washing water, the oil-containing rainwater of road runoff generation and the sanitary sewage of on-site, need to consider it to process.
Preparation medium waste water is due to Pollutant levels high (COD concentration is up to 1,000,000 mg/L), pollutes the most seriously, need emphasis to be processed, and the treatment process of oily(waste)water continued to use in the processing of such waste water mostly, mainly contains quiet heavy oil removal method, dissolved air flotation etc.Quiet heavy oil removal method has advantages of without adding medicament, cost is low, but has the shortcoming of inferior separating effect, and after oil removal, wastewater treatment difficulty is still very large; Dissolved air flotation is relatively suitable for the processing of lower concentration oily(waste)water, poor for highly concentrated oil-bearing wastewater effect.
Therefore, for the water quality characteristics of preparation medium waste water, and combine other different sources sewage of on-site, develop a kind of integrated conduct method of can high efficiente callback mineral oil, can meet again on-site sewage qualified discharge and be extremely necessary.
Summary of the invention
The object of this invention is to provide the integrated conduct method of a kind of preparation medium production plant area sewage, realize preparation medium waste water mineral recovery of oil, solve a comprehensive treating process difficult problem for the various different sources sewage of production plant area.
The integrated conduct method of preparation medium production of the present invention plant area sewage, concrete steps are as follows:
(1) preparation medium waste water enters acid out tank, add sulfuric acid and heat to 55 ~ 65 ℃ and carry out breakdown of emulsion pre-treatment 2 ~ 4 h, the volume ratio of sulfuric acid and preparation medium waste water is 0.4% ~ 1.0%, most mineral oil are separated from waste water, acid out tank top mineral oil enters recovery of oil pond, acid out tank bottom clear liquid enters Fenton (Fenton) retort under action of gravity, liquid pH to 3.0 ~ 3.5 in regulating tank, and add wherein mass concentration 30% hydrogen peroxide and ferrous sulfate, the mol ratio of hydrogen peroxide and ferrous sulfate is 8 ~ 10, and the reaction times is 2 ~ 4 h;
(2) water outlet of Fenton's reaction tank, workshop washing water and oil-containing road runoff rainwater are all sent into intermediate pool, in intermediate pool, add NaOH adjusting pH to 8～8.5, in intermediate pool, generate ironic hydroxide floss;
(3) the sewage mixed solution of intermediate pool enters air flotation pool, under the micro-bubble carrier disperseing, utilizes the adhesive attraction of ironic hydroxide floss and elaioleucite that suspended substance and little elaioleucite are separated from sewage at air flotation pool;
(4) air flotation pool water outlet and sanitary sewage enter comprehensive adjustment pond, and the water yield of carrying out of different sources sewage is regulated and water quality homogenize;
(5) sewage of comprehensive adjustment pond output enters anaerobic baffle plate pond through Impulsive tank with pulse mode, in anaerobic baffle plate pond, carry out intermittent aeration, after hydraulic detention time 3 ~ 4 d, enter Aerobic Pond, hydraulic detention time 2 ~ 3 d at Aerobic Pond, degraded most organic, enter again settling tank, after settling tank gravity separation, reach emission standard water quality and enter municipal sewage system; Settling tank part precipitating sludge is back to Aerobic Pond, another part mud and the mud of discharging from air flotation pool and anaerobic baffle plate pond all enter sludge thickener and concentrate, mud after concentrated is transported outward after plate-and-frame filter press press filtration, and filtrate enters intermediate pool and processes.
In step of the present invention (1), the built-in oil level inductive probe of described acid out tank, temp probe, heating coil and stirrer, acid out tank outsourcing lagging material, and PLC control device is installed, tank body side bottommost arranges lower clear liquid water outlet, every 0.1m, electromagnetic valve water outlet is set from top to bottom; PLC control device is controlled the switch of electromagnetic valve by oil level inductive probe feedback signal, realize the water outlet of clear liquid under mineral oil and acid out.
In order to keep the sludge concentration in anaerobic baffle plate pond and Aerobic Pond, conventionally bamboo filler can be all set in anaerobic baffle plate pond and Aerobic Pond.
The advantage of the integrated conduct method of preparation medium production of the present invention plant area sewage is:
(1) waste oil reclaims completely, realizes the utilization of waste effectively resource recycling.This technique can reclaim the low viscosity mineral oil in preparation medium waste water completely, can realize waste material efficient circulation recycling, and reduce cost for wastewater treatment.
(2) make full use of different sources sewage quality feature, organic combination is produced the various sewage of on-site, and effluent quality is good.Preparation medium waste water COD concentration after acid out breakdown of emulsion is processed is still higher, and shortage nutritive substance, present method utilizes on-site sanitary sewage extra-nutrition material, and workshop washing water and oil-containing road runoff rainwater are carried out after air supporting, as dilution water, alleviating the inhibition of high COD concentration.Through integrating on-site different sources sewage, solve a difficult problem for the difficult qualified discharge of high density preparation medium waste water, stable effluent quality is up to standard, reaches < < sewage and enters town sewer water quality standard > > (CJ3082-2010) B grade standard.
(3) strong to degradation capability poisonous, difficult degradation chemical fibre oil wastewater from chemical industry.Selecting anaerobism fixed bed filler is that anaerobic baffle plate is processed main process, bamboo packing layer is set therein to be held and stays anaerobic sludge, and intake with pulse mode, can guarantee that effective hydraulic detention time is longer, dead angle is few, mud contacts more abundant with pollutent, reach to tame to hold to stay the anaerobic sludge poisonous, difficult degradation chemical fibre oil wastewater from chemical industry of degrading, and this type of waste water is had to stronger degradation capability.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1 and example, the invention will be further described.
Production plant area of the oily manufacturing enterprise of certain chemical fibre sewage treatment process of take is example, and in this production plant area of chemical fibre oil manufacturing enterprise sewage treatment process, preparation medium waste water generation is about 2 tons/day, and COD maximum concentration can reach 1 * 10
6mg/L, in addition, plant area lavatory and dining room can produce sanitary sewage and be about 7 tons/day, and COD maximum concentration is 500 mg/L; Workshop washing water generation is about 2 tons/day, and COD maximum concentration is 1700 mg/L; Finished product loading place and truck parking are because the oil-containing road runoff sewage quantity producing that rains is about 9 tons/day.
Technical process is as Fig. 1, and first preparation medium waste water enter acid out tank, its built-in oil level inductive probe, temp probe, heating coil and stirrer; Outsourcing lagging material, and PLC control device is installed, tank body side bottommost arranges lower clear liquid water outlet, every 0.1m, electromagnetic valve water outlet is set from top to bottom; PLC control device is controlled the switch of electromagnetic valve by oil level inductive probe feedback signal, realize the water outlet of clear liquid under mineral oil and acid out.Preparation medium waste water enters after acid out tank, add sulfuric acid and heat to 60 ℃ and carry out breakdown of emulsion pre-treatment 4 h, the volume ratio of sulfuric acid and preparation medium waste water is 0.4%, after reaction, overwhelming majority mineral oil is separated from waste water, reclaim the mineral oil in waste water, significantly reduce organic concentration in waste water.Acid out tank top mineral oil enters recovery of oil pond, acid out tank bottom clear liquid enters Fenton retort under action of gravity, utilize Fenton oxidation style to improve the biochemical of waste water, liquid pH to 3.0 in regulating tank, add wherein mass concentration 30% hydrogen peroxide and ferrous sulfate, the mol ratio of hydrogen peroxide and ferrous sulfate is 10, reaction times is 4 h, preparation medium waste water is after acid out, COD clearance is 90% ~ 95%, the approximately recyclable 0.5 ton of waste oil of every 1 ton of preparation medium waste water, after acid out, COD concentration is below 40000 mg/L; Acid out tank bottom clear liquid enters Fenton retort, utilizes Fenton oxidation style to remove part COD and improves the biochemical of waste water, and COD clearance is 50% ~ 60%, and effluent COD concentration is down to below 20000 mg/L;
Subsequently, the water outlet of Fenton retort, workshop washing water and oil-containing road runoff rainwater are all sent into intermediate pool, in intermediate pool, add NaOH tune pH to 8, now in pond, can produce a large amount of ironic hydroxide flosss, intermediate pool COD concentration is at 2000-2500 mg/L.
The sewage mixed solution of three kinds of different sourcess of intermediate pool enters air flotation pool, under the micro-bubble carrier of air flotation pool high dispersing, utilize the adhesive attraction of ironic hydroxide floss and elaioleucite that suspended substance and little elaioleucite are separated from waste water, intermediate pool sewage is after air flotation pool, COD clearance is 10% ~ 20%, and effluent COD concentration is at 1700-1800 mg/L.
Air flotation pool water outlet and sanitary sewage enter comprehensive adjustment pond, and the water yield of carrying out of different sources sewage is regulated and water quality homogenize, and the Main Function of sanitary sewage is for providing the nutritive substances such as nitrogen phosphorus, and comprehensive adjustment pond COD concentration is at 1100-1300 mg/L.
The sewage of comprehensive adjustment pond output enters anaerobic baffle plate pond through Impulsive tank with pulse mode, in anaerobic baffle plate pond, carries out intermittent aeration, and object one is to prevent SO
4 2-significantly to H
2s transforms, and object two is part H that stripping produces
2s, to alleviate H
2s is to producing the restraining effect of acid and methanogen.After the anaerobic baffle plate tank waterpower residence time 4 d, enter Aerobic Pond, hydraulic detention time 3 d at Aerobic Pond, realize the degraded of most organic, enter again settling tank, after settling tank gravity separation, effluent COD concentration is at 350-450 mg/L, reaches < < sewage and enters town sewer water quality standard > > (CJ3082-2010) B grade standard and enter municipal sewage system.
A settling tank precipitating sludge part is back to Aerobic Pond, another part mud and the mud of discharging from air flotation pool and anaerobic baffle plate pond all enter sludge thickener and concentrate, mud after concentrated is transported outward after plate-and-frame filter press press filtration, and filtrate enters intermediate pool and processes.
Claims (1)
1. an integrated conduct method for preparation medium production plant area sewage, its feature comprises the following steps:
(1) preparation medium waste water enters acid out tank, add sulfuric acid and heat to 55～65 ℃ and carry out breakdown of emulsion pre-treatment 2～4h, the volume ratio of sulfuric acid and preparation medium waste water is 0.4%～1.0%, most mineral oil are separated from waste water, acid out tank top mineral oil enters recovery of oil pond, acid out tank bottom clear liquid enters Fenton's reaction tank under action of gravity, liquid pH to 3.0～3.5 in regulating tank, and add wherein mass concentration 30% hydrogen peroxide and ferrous sulfate, the mol ratio of hydrogen peroxide and ferrous sulfate is 8～10, and the reaction times is 2～4h; Described acid out tank, built-in oil level inductive probe, temp probe, heating coil and stirrer, acid out tank outsourcing lagging material, and PLC control device is installed, tank body side bottommost arranges lower clear liquid water outlet, every 0.1m, electromagnetic valve water outlet is set from top to bottom; PLC control device is controlled the switch of electromagnetic valve by oil level inductive probe feedback signal, realize the water outlet of clear liquid under mineral oil and acid out;
(2) water outlet of Fenton's reaction tank, workshop washing water and oil-containing road runoff rainwater are all sent into intermediate pool, in intermediate pool, add NaOH adjusting pH to 8～8.5, in intermediate pool, generate ironic hydroxide floss;
(3) the sewage mixed solution of intermediate pool enters air flotation pool, under the micro-bubble carrier disperseing, utilizes the adhesive attraction of ironic hydroxide floss and elaioleucite that suspended substance and little elaioleucite are separated from sewage at air flotation pool;
(4) air flotation pool water outlet and sanitary sewage enter comprehensive adjustment pond, different sources sewage is carried out to the water yield and regulate and water quality homogenize;
(5) sewage of comprehensive adjustment pond output enters anaerobic baffle plate pond through Impulsive tank with pulse mode, in anaerobic baffle plate pond, carry out intermittent aeration, after hydraulic detention time 3～4d, enter Aerobic Pond, hydraulic detention time 2～3d at Aerobic Pond, degraded most organic, enter again settling tank, after settling tank gravity separation, reach emission standard water quality and enter municipal sewage system; Settling tank part precipitating sludge is back to Aerobic Pond, another part mud and the mud of discharging from air flotation pool and anaerobic baffle plate pond all enter sludge thickener and concentrate, mud after concentrated is transported outward after plate-and-frame filter press press filtration, filtrate enters intermediate pool and processes, and in described anaerobic baffle plate pond and Aerobic Pond, is equipped with bamboo filler.
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| CN104250056B (en) * | 2013-06-28 | 2016-09-21 | 中国石油化工股份有限公司 | A kind of processing method of tertiary oil recovery surfactant production waste |
| CN103359889A (en) * | 2013-08-02 | 2013-10-23 | 江苏和顺环保股份有限公司 | Sewage treatment device |
| CN103395931A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing technology for waste emulsified liquid and machining wastewater |
| CN103395932A (en) * | 2013-08-02 | 2013-11-20 | 江苏和顺环保股份有限公司 | Processing apparatus for waste emulsified liquid and machining wastewater |
| CN103466877B (en) * | 2013-08-22 | 2015-05-27 | 桐昆集团浙江恒通化纤有限公司 | Full-biochemical treatment process of chemical fiber high-concentration spin finish effluent |
| CN103755096B (en) * | 2014-01-17 | 2015-03-04 | 上海交通大学 | Coupled Fenton oxidation and anaerobic digestion reactor for treating surplus sludge |
| CN103755097B (en) * | 2014-01-17 | 2015-05-20 | 上海交通大学 | Advanced oxidation-biological treatment device for non-biodegradable waste water |
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| CN104529090B (en) * | 2015-01-06 | 2016-08-17 | 常州大学 | A kind of deep treatment system of papermaking wastewater |
| CN105130042A (en) * | 2015-06-25 | 2015-12-09 | 巨化集团技术中心 | Pretreatment method for wastewater containing alkylphenol polyoxyethylene |
| CN105000708A (en) * | 2015-07-01 | 2015-10-28 | 上海幽岫环保科技有限公司 | Waste emulsion quantitative reduction processing technology and apparatus |
| CN105417884A (en) * | 2015-12-23 | 2016-03-23 | 山西翔宇化工有限公司 | Method and device of 4010NA waste water treatment |
| CN105819617B (en) * | 2016-03-28 | 2018-08-17 | 煤科集团杭州环保研究院有限公司 | The biological thickening processing method and biological thickening device of organic chemical waste water with high salt |
| CN108298688A (en) * | 2018-04-12 | 2018-07-20 | 北京昊业同宇科技有限公司 | The processing unit and method of high-concentration sewage |
| CN114031217A (en) * | 2021-11-24 | 2022-02-11 | 中复神鹰碳纤维股份有限公司 | Method for rapidly treating waste oil agent for carbon fiber spinning |
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| CN101823811B (en) * | 2010-03-23 | 2012-01-25 | 哈尔滨工业大学 | Method for treating saccharin wastewater |
| CN102557341B (en) * | 2011-12-26 | 2014-07-23 | 集惠瑞曼迪斯（上海）环保科技发展有限公司 | Treatment method of high-concentration emulsion waste water |
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