CN101333051A - Process for treating and recovering polyvinyl chloride centrifugation mother liquid by suspension method - Google Patents
Process for treating and recovering polyvinyl chloride centrifugation mother liquid by suspension method Download PDFInfo
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- CN101333051A CN101333051A CNA2007101871457A CN200710187145A CN101333051A CN 101333051 A CN101333051 A CN 101333051A CN A2007101871457 A CNA2007101871457 A CN A2007101871457A CN 200710187145 A CN200710187145 A CN 200710187145A CN 101333051 A CN101333051 A CN 101333051A
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Abstract
A PVC mother liquid treatment and reuse method through suspension comprises the following steps: a, the mother liquid of PVC is cooled to 30-40 DEG C for solid-liquid separation so as to reclaim PVC particles; b, anaerobic biological treatment is made; c, aerobic biological treatment is followed; d, a second precipitation is carried through for solid-liquid separation to get the sludge removed; e, then micro-contamination is carried through.
Description
Technical field
The invention belongs to wastewater processing technology, relate in particular to a kind of suspension method PVC centrifugal mother liquor treatment reclaiming method.
Background technology
Polyvinyl chloride (PVC) is one of five big interchangeable heat plastic synthetic resins, and its goods have good physicals and chemical property, is widely used in fields such as industry, building, agriculture daily life, packing, electric power, public utilities.Through the suitability for industrialized production in 60 years and application practice, PVC has successfully replaced materials such as a lot of metals, timber, and its throughput and output rise year by year.By 2005, PVC throughput in the world reached 3,601 ten thousand tons/year.The data prediction is arranged, and world's PVC growth rate of demand was about 3.5% in 2005～2010 years, will reach 3,608 ten thousand tons/year to world PVC demand in 2010.
The method of suitability for industrialized production polyvinyl chloride resin generally has 4 kinds: suspension polymerization, letex polymerization, mass polymerization and solution polymerization in the world wide.Wherein suspension method PVC output is the highest, accounts for 80% of Gross World Product.Domestic based on suspension pvc resin, in 649.2 ten thousand tons of China PVC ultimate productions in 2005, ten thousand tons of suspension method PVC622.6 account for 93.59%.
Suspension method PVC device, 1 ton of PVC of every production produces about 3～4 tons of centrifugal mother liquor waste water, and Chinese suspension PVC annual production is by 622.6 ten thousand tons, and then the total generation of PVC centrifuge mother liquor is about 22,800,000 tons.Because of containing the organism of difficult degradations such as initiator that polymerization process doses, dispersion agent, terminator in this waste water, so intractability is very big.On the other hand, this waste water contains lower inorganic pollutant, and promptly specific conductivity is very low, has very big reuse to be worth.Since PVC suitability for industrialized production in 1958, most of PVC enterprise just with centrifuge mother liquor through directly discharging after the simple liquid-solid separating treatment, be back to the technology of production equipment after centrifuge mother liquor is handled, be blank at home for many years.
Summary of the invention
The object of the present invention is to provide a kind of processing reuse method of suspension type polyvinyl-chloride centrifuge mother liquor, carry out reuse after polyvinyl chloride centrifugation mother liquid is further processed.
For achieving the above object, processing reuse method provided by the invention the steps include:
A) centrifuge mother liquor of polyvinyl chloride is reduced to 30-40 ℃ after, carry out solid-liquid separation, reclaim polyvinyl chloride particles;
B) centrifuge mother liquor of step a processing carries out the anaerobic biological processing;
C) centrifuge mother liquor of step b carries out the aerobic biochemical processing;
D) centrifuge mother liquor of step c carries out the precipitation second time, carries out solid-liquid separation, removes mud;
E) centrifuge mother liquor of steps d carries out little pollution processing.
Described processing reuse method wherein, adopts cooling tower, plate-type heat exchanger, disc heat interchanger or tubular heat exchanger that centrifuge mother liquor is lowered the temperature.
Described processing reuse method, wherein, the technology of solid-liquid separation comprises precipitation, filtration, centrifugation etc. and combination technique thereof.
Described solid-liquid separation technique, wherein, that precipitation forms is divided into is vertical-flow, flat flow, radial-flow, inclined tube-type or ramp type.
Described solid-liquid separation technique, wherein, filtered version is divided into pressure type, hydrocone type, self-cleaning type, gravity type boat davit, valveless formula.
Described solid-liquid separation technique, wherein, filtration medium is divided into quartz sand, hard coal, fibrous nodules, ceramic membrane, stainless (steel) wire.
Described processing reuse method, wherein, anaerobic biological is handled and is adopted upflow anaerobic sludge blanket reactor technology, acidication technology and flow lifting type anaerobic biofilter; It is 4-20 hour that anaerobic biological is handled hydraulic detention time.
Described processing reuse method, wherein, the reactor that anaerobic biological is handled can adopt cylinder of steel, enamel assembly unit jar or Steel Concrete material.
Described processing reuse method, wherein, aerobic biochemical is handled and is selected contact oxidation technology, activated sludge process, extended aeration technology, continuous batch activated sludge technology for use; It is 6-20 hour that aerobic biochemical is handled hydraulic detention time.
Described processing reuse method, wherein, little pollution is handled and is adopted BAF, sandfiltration pot, activated charcoal filter, more medium filter and combination thereof.
Described processing reuse method, wherein, the centrifuge mother liquor after little pollution is handled carries out desalting treatment.
Described processing reuse method, wherein, desalting treatment is selected ion exchange method, reverse osmosis, ultrafiltration reverse osmosis or combination process for use.
Water outlet COD through little pollution processing unit can reach " People's Republic of China's water environment quality standard " (GB3838-2002) middle III class water body standard, and specific conductivity≤200 μ s/cm, can be back to greening, flush the toilet, recirculating cooling water system or a water; Pass through the unitary water conductivity≤3 μ s/cm of going out of desalting treatment, can be back to polymerization technique.
Description of drawings
Fig. 1 handles the schematic flow sheet of reuse method for the present invention.
Embodiment
The waste water that desire of the present invention is handled is the centrifugal mother liquor waste water that produces when producing PVC, need lower the temperature through cooling tower, enter vertical sedimentation basin then, behind the sedimentation part suspended substance, enter anaerobic biological and aerobic biochemical and carry out the biological chemistry processing, remove majority of organic pollutants; After the water outlet after the biochemical treatment enters second pond precipitation removal mud, enter intermediate pool; Promote through little pollution processing unit by pump, carry out advanced treatment, further remove the organic pollutant that is difficult for degraded in the water; Little pollution unit water outlet enters reuse pool A, evenly sends to recirculating cooling water system and desalination unit with pump.Desalination unit is produced water and is entered reuse pool B, by being pumped into polymerization technique.
Anaerobic biological adopts hydrolysis acidification pool, and the residence time is 20h, in establish diving mixer, form complete admixture; Top is provided with 1 meter thick fixedly packing layer, fixes and hold back Sludge Bed.
Aerobic biochemical adopts contact-oxidation pool, and the residence time is 20h.
Little pollution processing unit adopts BAF pond (BAF) and sandfiltration pot combination treatment.
Desalination unit adopts ion exchange process.
Claims (10)
1, a kind of processing reuse method of suspension type polyvinyl-chloride centrifuge mother liquor the steps include:
A) centrifuge mother liquor of polyvinyl chloride is cooled to 30-40 ℃ after, carry out solid-liquid separation, reclaim polyvinyl chloride particles;
B) carrying out anaerobic biological handles;
C) carrying out aerobic biochemical handles;
D) carry out the precipitation second time, solid-liquid separation is removed mud;
E) carrying out little pollution handles.
2, processing reuse method as claimed in claim 1 wherein, adopts cooling tower, plate-type heat exchanger, disc heat interchanger or tubular heat exchanger that centrifuge mother liquor is lowered the temperature.
3, processing reuse method as claimed in claim 1 wherein, adopts the mode of precipitation, filtration, centrifugation or its combination to carry out solid-liquid separation.
4, solid-liquid separation technique as claimed in claim 3, wherein, coprecipitation mode is vertical-flow, flat flow, radial-flow, inclined tube-type or ramp type.
5, solid-liquid separation technique as claimed in claim 3, wherein, filter type is pressure type, hydrocone type, self-cleaning type, gravity type boat davit or valveless formula; Filtration medium is divided into quartz sand, hard coal, fibrous nodules, ceramic membrane or stainless (steel) wire.
6, processing reuse method as claimed in claim 1, wherein, anaerobic biological is handled and is adopted upflow anaerobic sludge blanket reactor technology, acidication technology and flow lifting type anaerobic biofilter; It is 4-20 hour that anaerobic biological is handled hydraulic detention time.
7, processing reuse method as claimed in claim 1, wherein, the reactor that anaerobic biological is handled adopts cylinder of steel, enamel assembly unit jar or Steel Concrete material.
8, processing reuse method as claimed in claim 1, wherein, aerobic biochemical is handled and is selected contact oxidation technology, activated sludge process, extended aeration technology, continuous batch activated sludge technology for use; It is 6-20 hour that aerobic biochemical is handled hydraulic detention time.
9, processing reuse method as claimed in claim 1, wherein, little pollution is handled and is adopted BAF, sandfiltration pot, activated charcoal filter, more medium filter and combination thereof.
10, processing reuse method as claimed in claim 1, wherein, the centrifuge mother liquor after little pollution is handled adopts ion exchange method, reverse osmosis, ultrafiltration reverse osmosis or combination process to carry out desalting treatment.
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| CN2007101871457A CN101333051B (en) | 2007-11-16 | 2007-11-16 | Process for treating and recovering polyvinyl chloride centrifugation mother liquid by suspension method |
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| CN2007101871457A CN101333051B (en) | 2007-11-16 | 2007-11-16 | Process for treating and recovering polyvinyl chloride centrifugation mother liquid by suspension method |
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| CN101333051A true CN101333051A (en) | 2008-12-31 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557257A (en) * | 2012-02-09 | 2012-07-11 | 杭州天创环境科技股份有限公司 | PVC (Polyvinyl Chloride) mother liquor treatment method based on MBR (Membrane Bioreactor) technique |
| CN102963976A (en) * | 2011-09-01 | 2013-03-13 | 株式会社水环境研究所 | Organic wastewater processing method and organic wastewater processing system |
| CN104291487A (en) * | 2014-10-09 | 2015-01-21 | 上海安赐机械设备有限公司 | Treatment device and treatment method for treating and recycling PVC mother liquid wastewater |
| CN104671599A (en) * | 2015-01-29 | 2015-06-03 | 无锡昊瑜节能环保设备有限公司 | Industrial wastewater recycling device |
| CN105174628A (en) * | 2015-09-23 | 2015-12-23 | 北京金峡超滤设备有限责任公司 | Waste water treatment method |
| CN105314789A (en) * | 2014-06-09 | 2016-02-10 | 蒋寿悟 | Treatment process of recycling sewage for circulating cooling water |
| CN105693034A (en) * | 2016-04-06 | 2016-06-22 | 内蒙古宜化化工有限公司 | PVC centrifugal mother liquid treating and recycling method and device |
| CN106830547A (en) * | 2017-03-03 | 2017-06-13 | 北京中科众联新能源技术服务有限公司 | A kind of suspension type polyvinyl-chloride polymerization workshop section method of wastewater treatment and device |
| CN108439643A (en) * | 2018-04-16 | 2018-08-24 | 新疆华泰重化工有限责任公司 | The reclaiming system for the treatment of of wastewater from stripping in a kind of PVC Production Process |
| CN110002676A (en) * | 2018-04-18 | 2019-07-12 | 中国环境科学研究院 | A kind of sewage plant utilized based on sub-prime and steam power plant's water circulation use technique |
| CN111196645A (en) * | 2019-10-08 | 2020-05-26 | 安徽华塑股份有限公司 | Centrifugal mother liquor water recycling system and method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546403A (en) * | 2003-12-04 | 2004-11-17 | 澎 王 | Regeneration cycle applied technique for waste water from polyvinyl chloride industry |
| CN1295166C (en) * | 2005-01-12 | 2007-01-17 | 天津市塘沽区鑫宇环保科技有限公司 | Method for directly treating high temperature and high turbidity PVC mother liquor by using biologic filter |
| CN100358815C (en) * | 2005-04-07 | 2008-01-02 | 凯膜过滤技术(上海)有限公司 | Process and equipment for treating PVC centrifugal mother liquor |
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2007
- 2007-11-16 CN CN2007101871457A patent/CN101333051B/en active Active
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102963976A (en) * | 2011-09-01 | 2013-03-13 | 株式会社水环境研究所 | Organic wastewater processing method and organic wastewater processing system |
| CN102557257A (en) * | 2012-02-09 | 2012-07-11 | 杭州天创环境科技股份有限公司 | PVC (Polyvinyl Chloride) mother liquor treatment method based on MBR (Membrane Bioreactor) technique |
| CN105314789A (en) * | 2014-06-09 | 2016-02-10 | 蒋寿悟 | Treatment process of recycling sewage for circulating cooling water |
| CN104291487A (en) * | 2014-10-09 | 2015-01-21 | 上海安赐机械设备有限公司 | Treatment device and treatment method for treating and recycling PVC mother liquid wastewater |
| CN104671599A (en) * | 2015-01-29 | 2015-06-03 | 无锡昊瑜节能环保设备有限公司 | Industrial wastewater recycling device |
| CN105174628A (en) * | 2015-09-23 | 2015-12-23 | 北京金峡超滤设备有限责任公司 | Waste water treatment method |
| CN105693034A (en) * | 2016-04-06 | 2016-06-22 | 内蒙古宜化化工有限公司 | PVC centrifugal mother liquid treating and recycling method and device |
| CN106830547A (en) * | 2017-03-03 | 2017-06-13 | 北京中科众联新能源技术服务有限公司 | A kind of suspension type polyvinyl-chloride polymerization workshop section method of wastewater treatment and device |
| CN106830547B (en) * | 2017-03-03 | 2018-01-09 | 北京中科众联新能源技术服务有限公司 | A kind of suspension type polyvinyl-chloride polymerization workshop section method of wastewater treatment and device |
| CN108002654A (en) * | 2017-03-03 | 2018-05-08 | 北京中科众联新能源技术服务有限公司 | A kind of suspension type polyvinyl-chloride polymerization workshop section wastewater treatment method |
| CN108002654B (en) * | 2017-03-03 | 2020-11-13 | 北京中科众联新能源技术服务有限公司 | Suspension method polyvinyl chloride polymerization section wastewater treatment method |
| CN108439643A (en) * | 2018-04-16 | 2018-08-24 | 新疆华泰重化工有限责任公司 | The reclaiming system for the treatment of of wastewater from stripping in a kind of PVC Production Process |
| CN110002676A (en) * | 2018-04-18 | 2019-07-12 | 中国环境科学研究院 | A kind of sewage plant utilized based on sub-prime and steam power plant's water circulation use technique |
| CN111196645A (en) * | 2019-10-08 | 2020-05-26 | 安徽华塑股份有限公司 | Centrifugal mother liquor water recycling system and method thereof |
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| CN101333051B (en) | 2010-07-28 |
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