CN102079604A - New treating and recycling technology of polyvinyl chloride (PVC) centrifugal mother liquid - Google Patents
New treating and recycling technology of polyvinyl chloride (PVC) centrifugal mother liquid Download PDFInfo
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- CN102079604A CN102079604A CN 201010602436 CN201010602436A CN102079604A CN 102079604 A CN102079604 A CN 102079604A CN 201010602436 CN201010602436 CN 201010602436 CN 201010602436 A CN201010602436 A CN 201010602436A CN 102079604 A CN102079604 A CN 102079604A
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Abstract
The invention discloses a new treating and recycling technology of a polyvinyl chloride (PVC) centrifugal mother liquid. After mother liquid wastewater is treated by an electromagnetic strong oxidation-multimedium filtration combined technology, the water quality of the mother liquid wastewater can meet the following standards: the chemical oxygen demand (COD) is not more than 50mg/L, the electrical conductivity is not more than 1000mu s/cm and the suspended substance (SS) content is not more than 10mg/L; and the treated water meets the demands of the circulating cooling water, and the circulating use of the mother liquid wastewater can be realized. The treatment technology provided by the invention is easy to operate, and has the advantages of low operating cost and high maneuverability; and by adopting the technology, pollutants which can not be removed by the traditional technology can be treated, the influences of pollution discharge on the environment can be reduced, and the operating cost can be saved.
Description
Technical field
The invention belongs to field of waste water treatment, disclose a kind of polyvinyl chloride (PVC) centrifugal mother liquor treatment reclaiming novel process that is used for.
Background technology
The most aqueous suspension polymerization technologies that adopt of the polymerization technique of polyvinyl chloride (PVC) can produce a large amount of centrifugal mother liquor waste waters in the production process.Contain the impurity such as oligopolymer that produce in initiator, dispersion agent and the reaction process of a small amount of PVC particle, polymerization process adding in the centrifuge mother liquor.1 ton of PVC of every production generally need consume 3～5 tons of deionized waters, and because of the polymerization temperature difference, the temperature of centrifuge mother liquor is generally about 40～70 ℃.Contain dissolved organic matters such as PVA, initiator, dihydroxyphenyl propane in the centrifuge mother liquor, mother liquor turbidity height, salts contg is low.The centrifuge mother liquor concentration of suspension is 20～300mg/L, and organic concentration is lower, and difficult degradation has certain toxicity, and COD belongs to the wastewater from chemical industry of middle lower concentration usually at 200～500mg/L.This waste water quality index is as shown in table 1:
Table 2-1:PVC mother liquor waste water index
| Suspended substance (mg.L -1) | The pH value | COD Cr/(mg.L -1) | Electricity is led/(μ s/cm) |
| <40 | 8-11 | 150-200 | <250 |
The PVC factory of China generally adopts adjusting, flocculation, sedimentary method to remove a little P VC suspended particle in the mother liquor at present, but for solubility COD, it is but very low to remove efficient.Adopt the electrolysis-coagulation method to handle the PVC centrifuge mother liquor, the pollutants removal rate height is to COD, the clearance of BOD and TSS reaches more than 90% respectively, testing apparatus has good impact resistance to discharge of sewage load, but this method is limited because of technology, is not suitable for the processing of full scale plant waste water.Adopt Wastewater Treated by Activated Sludge Process PVC mother liquor waste water, in the short-term lab scale, obtained the good treatment effect, but after engineering is gone into operation, abandoned because of sludge bulking easily takes place.Main organism is PVA in the PVC centrifuge mother liquor, so this is the reason that centrifuge mother liquor should not adopt Wastewater Treated by Activated Sludge Process.
Add oxygenant and be used in practice in water technology, but how to react under normal temperature condition, common many oxidizing reactions speed of response at normal temperatures are extremely low, to such an extent as to can not take place, therefore can not reach the purpose of advanced treatment of wastewater.
The methods such as traditional materialization, biochemistry of considering are handled the PVC mother liquor waste water, poor effect, and cost of investment is big.Up to the present do not see the report of handling the PVC mother liquor by the strong oxidation of electromagnetism-multi-medium filtering process combined as yet.
Summary of the invention
The objective of the invention is defective, a kind of polyvinyl chloride (PVC) centrifugal mother liquor treatment reclaiming novel process that is used for is provided, make polyvinyl chloride (PVC) mother liquor waste water after the processing can reach the standard of recirculated cooling water at above-mentioned prior art.It is low, stable, reliable that the present invention has facility investment, the advantage that occupation area of equipment is little, and can reduce production costs and reduce the consumption of water resources significantly, have good realistic meaning for the PVC industrial expansion.
The treatment process that the strong oxidation-multi-medium filtering of electromagnetism provided by the invention combines has and comprises following step:
1) at first with the mother liquor waste water that produces in the PVC production, regulate its pH, add specific oxygenant and catalyzer, enter the strong oxidation reactor of electromagnetism, utilize electromagnetic field energy and solid state reaction medium in the strong oxidation reactor of electromagnetism, improve the oxidation potential of oxygenant, impel the organic pollutant oxidizing reaction of difficult degradation.
2) water outlet after the electromagnetism oxidation adds a certain amount of coagulating agent, regulates between its pH to 8-9, and then by multi-medium filtering, removes suspended substance and iron in the waste liquid, and the water outlet after the processing recycles.
Polyvinyl chloride after above-mentioned processing (PVC) mother liquor waste water can reach: COD≤50mg/L, specific conductivity≤1000 μ s/cm, SS :≤10mg/L, satisfy circulation cooling water standard, and realize waste water reclaiming to greatest extent.Process operations expense provided by the invention is relatively low, workable, both can reduce the influence of blowdown to environment, can save running cost again.
Description of drawings
Fig. 1 is polyvinyl chloride (PVC) the centrifugal mother liquor treatment reclaiming new technological flow figure that is used for of the present invention
Embodiment
The invention will be further described below in conjunction with specific embodiment, but not as a limitation of the invention.
Embodiment 1
Get polyvinyl chloride (PVC) mother liquor waste water in certain chemical plant, its CODCr of this waste water is 186mg/L, and the wastewater treatment step is as follows:
1) gets former water 500mL, transfer pH=2-4, be heated to 55 ℃, add a spot of ferrous sulfate (FeSO4 7H2O) and hydrogen peroxide, extra pulse ripple 1min under agitation condition.
2) negate water outlet afterwards 200mL, adding a spot of poly-aluminium and sodium hydroxide is 6mL, transfers pH=8-10, filters the suspended substance of removing in the waste liquid, water outlet COD is that 16.0mg/L, specific conductivity are 914.9 s/cm.
Embodiment 2
Get polyvinyl chloride (PVC) mother liquor waste water in certain chemical plant, 52 ℃ of this wastewater temperatures, CODCr are 167.6mg/L, and the wastewater treatment step is as follows:
1) gets former water 500L, transfer to pH to 3-4 with the vitriol oil, add a spot of ferrous sulfate, after being stirred to thorough mixing, cross the inductive reaction device with the flow velocity of 500L/h, in the electromagnetism oxidizer, add a certain amount of gac and a certain amount of hydrogen peroxide, the hydrogen peroxide flow velocity is 10ml/min, and the water outlet of electromagnetism oxidation system enters the further deep oxidation reaction of intermediate water tank 1 hour.
2) water outlet after deep oxidation is handled is reconciled pH=8-9 with poly-aluminium (PAC) coagulation, and with the suspended substance in the filter paper removal waste liquid, water outlet COD is that 42.9mg/L, specific conductivity are 920 s/cm then, and iron level is 0.73 mg/L.
Embodiment 3
Get polyvinyl chloride (PVC) mother liquor waste water in certain chemical plant, its CODCr of this waste water is 196mg/L, and the wastewater treatment step is as follows:
1) former water is crossed electromagnetism-ozone reactor with the flow velocity of 500L/h.Oxygenant adds according to the CODcr value 0.5-3 amount doubly of sewage, is the solid state reaction medium with the gac, and gac accounts for 30% of reactor useful volume; The reactor electromagnetic intensity is 1Kw, transmit electromagnetic energy for the electromagnetic fluid reactor by electromagnetic wave generator, make and form electromagnetic field in the electromagnetic fluid reactor, gac absorbs energy of electromagnetic field at its local high temperature, high pressure that produces moment, cause producing violent redox reaction, 30 seconds general reaction time, pollutent decomposes removal in the waste water the most at last;
2) negate should the back water outlet enter original more medium filter again, removes colloid and suspended substance remaining in the water, and water outlet COD is that 28mg/L, specific conductivity are 154 s/cm.
Above-described embodiment, the present invention embodiment a kind of more preferably just, the common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacing all should be included in protection scope of the present invention.
Claims (4)
1. one kind is used for polyvinyl chloride (PVC) centrifugal mother liquor treatment reclaiming novel process, may further comprise the steps:
Adopted the strong oxidation of electromagnetism-multi-medium filtering combination process the PVC centrifuge mother liquor that discharges in the PVC production process to be returned after treatment the novel process of circulating cooling system.At first, with the mother liquor waste water that produces in the PVC production, regulate between its pH, after adding specific oxygenant and catalyzer, enter the strong oxidation reactor of electromagnetism, utilize electromagnetic field energy and solid state reaction medium in the strong oxidation reactor of electromagnetism, improve the oxidation potential of oxygenant, reduce the chemical activation energy of the oxidized decomposition of organic pollutant simultaneously, impel the organic pollutant of difficult degradation to decompose, water outlet after the oxidation, add a certain amount of coagulating agent, regulate between its pH to 8-9, and then pass through multi-medium filtering, remove suspended substance and iron in the waste liquid, the water outlet after the processing recycles.
2. a kind of polyvinyl chloride (PVC) centrifugal mother liquor treatment reclaiming novel process that is used for as claimed in claim 1 comprises following step:
1) at first with the mother liquor waste water that produces in the PVC production, regulate its pH, add specific oxygenant and catalyzer, enter the strong oxidation reactor of electromagnetism, utilize electromagnetic field energy and solid state reaction medium in the strong oxidation reactor of electromagnetism, improve the oxidation potential of oxygenant, reduce the chemical activation energy of the oxidized decomposition of organic pollutant simultaneously, impel the organic pollutant oxidizing reaction of difficult degradation.
2) with the water outlet after the oxidation in the step 1), add a certain amount of coagulating agent, to regulate between its pH to 8-9, and then, remove suspended substance and iron in the waste liquid by multi-medium filtering, the water outlet after the processing recycles.
3. an a kind of polyvinyl chloride as claimed in claim 1 (PVC) centrifugal mother liquor treatment reclaiming novel process is characterized in that:
The strong oxidation reactor of described electromagnetism comprises coil reactor, packing tower, aeration tower.
Described solid state reaction medium can be flyash, Attapulgite, wilkinite, zeolite, haydite or contain rare earth element and load transition element (iron, nickel, chromium, manganese) in one or more solid state reaction medium.
Described specific oxygenant is for being selected from dioxide peroxide (ClO2), ozone (O3), the hydrogen peroxide (H2O2) one or more as oxygenant;
Described specific catalyst is to be selected from ferric sulfate, ferrous sulfate, single nickel salt, the cupric nitrate one or more;
Described coagulating agent is for being selected from milk of lime, sodium hydroxide, poly-iron, poly-aluminium (PAC), the polyacrylamide (PAM) one or more;
4. a kind of polyvinyl chloride (PVC) centrifugal mother liquor treatment reclaiming novel process that is used for as claimed in claim 1, it is characterized in that: described more medium filter comprises one or more in quartz sand filtration device, filtration with manganese sand device, the activated charcoal filter.
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| CN 201010602436 CN102079604A (en) | 2010-12-23 | 2010-12-23 | New treating and recycling technology of polyvinyl chloride (PVC) centrifugal mother liquid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445724A (en) * | 2014-11-20 | 2015-03-25 | 新疆中泰化学股份有限公司 | Device for recycling high chlorine wastewater generated during production of polyvinyl chloride by calcium carbide method and application method thereof |
| CN105036463A (en) * | 2015-07-04 | 2015-11-11 | 吉林大学 | Polyvinyl chloride centrifugal mother liquor wastewater pretreatment method |
| CN109502857A (en) * | 2017-09-15 | 2019-03-22 | 上海江柘环境工程技术有限公司 | A kind of processing equipment and its processing method of polyvinyl chloride centrifugation mother liquid waste water |
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| CN101033105A (en) * | 2007-02-01 | 2007-09-12 | 彭云龙 | Photoelectromagnetism integrated waste water advanced oxidization method and device thereof |
| CN101234832A (en) * | 2007-12-19 | 2008-08-06 | 北京大古时代环保科技有限公司 | Industrial sewage irradiation integrated treatment technique |
| JP2009262008A (en) * | 2008-04-22 | 2009-11-12 | Sharp Corp | Water treating apparatus and water treating method |
| CN101774722A (en) * | 2009-02-16 | 2010-07-14 | 北京拓峰科技开发有限责任公司 | Novel industrial sewage treatment process |
| CN101805070A (en) * | 2009-02-16 | 2010-08-18 | 胡德錄 | Electromagnetic fluid reaction device |
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2010
- 2010-12-23 CN CN 201010602436 patent/CN102079604A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033105A (en) * | 2007-02-01 | 2007-09-12 | 彭云龙 | Photoelectromagnetism integrated waste water advanced oxidization method and device thereof |
| CN101234832A (en) * | 2007-12-19 | 2008-08-06 | 北京大古时代环保科技有限公司 | Industrial sewage irradiation integrated treatment technique |
| JP2009262008A (en) * | 2008-04-22 | 2009-11-12 | Sharp Corp | Water treating apparatus and water treating method |
| CN101774722A (en) * | 2009-02-16 | 2010-07-14 | 北京拓峰科技开发有限责任公司 | Novel industrial sewage treatment process |
| CN101805070A (en) * | 2009-02-16 | 2010-08-18 | 胡德錄 | Electromagnetic fluid reaction device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104445724A (en) * | 2014-11-20 | 2015-03-25 | 新疆中泰化学股份有限公司 | Device for recycling high chlorine wastewater generated during production of polyvinyl chloride by calcium carbide method and application method thereof |
| CN104445724B (en) * | 2014-11-20 | 2016-08-24 | 新疆中泰化学股份有限公司 | High chlorine root wastewater recycling device and using method thereof in generated by polyvinyl chloride by calcium carbide production |
| CN105036463A (en) * | 2015-07-04 | 2015-11-11 | 吉林大学 | Polyvinyl chloride centrifugal mother liquor wastewater pretreatment method |
| CN109502857A (en) * | 2017-09-15 | 2019-03-22 | 上海江柘环境工程技术有限公司 | A kind of processing equipment and its processing method of polyvinyl chloride centrifugation mother liquid waste water |
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Application publication date: 20110601 |