CN1990396A - Treatment process for waste water of PVC production - Google Patents
Treatment process for waste water of PVC production Download PDFInfo
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- CN1990396A CN1990396A CN 200510135208 CN200510135208A CN1990396A CN 1990396 A CN1990396 A CN 1990396A CN 200510135208 CN200510135208 CN 200510135208 CN 200510135208 A CN200510135208 A CN 200510135208A CN 1990396 A CN1990396 A CN 1990396A
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- treatment process
- waste water
- pvc production
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- liquid separation
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Abstract
The invention relates to a treating process for wastewater in polyvinyl chloride production. It employs process of two-stage chemical oxidation: oxidative adsorption- solid liquid separation- two stage chemical oxidation- active carbon filter- fine filter. The quality of wastewater treated by this process can reach the cooling water return standard, the COD Mn < 10 mg/l, electrical conductivity < 900 us/cm, Cl-1<300 mg/l, and the pH is between 6.5 to 7.5. The process is characterized by environmental protection and reduced operation cost.
Description
Technical field
The invention belongs to field of waste water treatment, specifically relate to a kind of treatment process that is used for waste water of PVC production.
Background technology
PVC (polyvinyl chloride) is a kind of important starting material, and its product has been widely used in each link of national product.In the process of producing PVC, except in reactor, adding the vinyl chloride monomer, also need add a certain amount of water and dispersion agent, thereby, in the PVC building-up process, will produce a certain amount of sewage, this part sewage contains a certain amount of organism, and (30～50mg/L), and have low specific conductivity, the water quality analysis of this sewage is as shown in table 1.
Table 1, PVC sewage quality
| COD Mn | Electricity is led (us/cm) | pH |
| 30～50mg/l | 300～600 | 8～10 |
For this type of sewage, PVC both domestic and external manufacturer normally with waste water directly or enter environment after simple process, causes the waste of environmental pollution and resource.
Summary of the invention
In order to handle this type of sewage, reach the requirement of chemical plant water coolant reuse, make COD
Mn＜10mg/l, specific conductivity＜900us/cm, Cl
-＜300mg/l the invention provides a kind of treatment process that is used for waste water of PVC production.
The treatment process that is used for waste water of PVC production provided by the invention, as shown in Figure 1, adopted treatment process, specifically comprised following step based on the combined two-stage chemical oxidation of oxidation absorption-solid-liquid separation-secondary chemical oxidation-active carbon filtration-fine filtering:
1) in (the PVC sewage) of waste water of PVC production, adds the oxygenant I of 10～50mg/l, simultaneously or add 50～350mg/l ferric flocculant, carry out oxidation absorption reaction 2～30min in batches;
Described oxygenant I is selected from permanganate, ferrate, perchlorate, superoxide and the ozone one or more;
Described ferric flocculant is to be selected from bodied ferric sulfate, polyaluminum sulfate ferrosilicon, ferric sulfate, iron(ic) chloride, the poly-ferric chloride one or more;
2) solid-liquid separation is carried out in the water outlet of step 1);
Described solid-liquid separation can adopt technologies such as air supporting, precipitation, eddy flow, and the air supporting hydraulic detention time is 10～30min; The precipitation hydraulic detention time is 2～8 hours; The eddy flow hydraulic detention time is 5～30min;
In order to quicken segregation rate, when carrying out solid-liquid separation, also can add flocculation agent, as PAM, add-on is 2～8mg/l;
3) to step 2) water outlet after the solid-liquid separation adds 5～50mg/l oxygenant II, is at least the oxidizing reaction of 5min;
Described oxygenant II is that ozone is or/and dioxide peroxide;
The reactor that carries out oxidizing reaction in the step 3) comprises bubble tower, sieve-tray tower, flotation machine or Cyclonic reactor;
4) with water outlet hydraulic retention 2～45min in charcoal filter of step 3), organism in the sewage is adsorbed, and can destroy ozone and dioxide peroxide;
5) water outlet with step 4) enters fine filter, and the filtrate discharge that obtains is in environment;
Described fine filter comprises sand-bed filter, security personnel's strainer, fabric filter, film filter or metallic filter.
After above-mentioned processing, the reached water coolant reuse standard of waste water of PVC production, its COD
Mn＜10mg/l, specific conductivity＜900us/cm, Cl
-＜300mg/l, pH:6.5～7.5.Treatment process provided by the invention both can reduce the influence of blowdown to environment, can save running cost again.
Description of drawings
Fig. 1 is the synoptic diagram that is used for the treatment process of waste water of PVC production of the present invention.
Embodiment
Embodiment 1,
Get the PVC production waste of certain factory, this sewage specific conductivity is 350us/cm, COD
MnBe 39mg/l, pH=9.2 adopts treatment process of the present invention that this PVC sewage is handled.
At first, in every liter of sewage, add 3.75mg potassium permanganate, 11.25mg potassium ferrate and the siliceous bodied ferric sulfate of 100mg, carry out oxidation absorption reaction 10min after, enter settling tank and adopt air-float technology to carry out solid-liquid separation, the air supporting hydraulic detention time is 20min; Enter Cyclonic reactor through the post precipitation water outlet, in every liter of sewage, add the 25mg dioxide peroxide simultaneously, after carrying out oxidizing reaction 15min, enter the active carbon filtration jar, hydraulic detention time at activated carbon canister is 5min, organism in the sewage is adsorbed, and can destroy ozone and dioxide peroxide; Water outlet enters quartz sand fine filtering jar behind active carbon filtration, and the filtrate discharge that obtains is in environment.
Water outlet COD after above-mentioned art breading
Mn＜10mg/l, specific conductivity＜600us/cm, pH:6.5～7.5 have reached the water coolant standard.
Embodiment 2,
Get the PVC production waste of certain factory, this sewage specific conductivity is 280us/cm, COD
MnBe 42mg/l, pH=9.7 adopts treatment process of the present invention that this PVC sewage is handled.
At first, in every liter of sewage, add 10mg ozone, and divide and add 150mg iron(ic) chloride and 200mg poly-ferric chloride for 2 times respectively, after carrying out oxidation absorption reaction 2min, entering settling tank adopts depositing technology to carry out solid-liquid separation, add flocculation agent PAM6mg in every liter of sewage, the precipitation hydraulic detention time is 5 hours; Enter bubble tower through the post precipitation water outlet, in every liter of sewage, add simultaneously 5mg ozone, carry out oxidizing reaction 5min after, enter the active carbon filtration jar, hydraulic detention time at activated carbon canister is 2min, organism in the sewage is adsorbed, and can destroy ozone and dioxide peroxide; Water outlet enters fabric filter behind active carbon filtration, and the filtrate discharge that obtains is in environment.
Water outlet COD after above-mentioned art breading
Mn＜10mg/l, specific conductivity＜700us/cm, pH:6.5～7.5 have reached the water coolant standard.
Embodiment 3,
Get the PVC production waste of certain factory, this sewage specific conductivity is 150us/cm, COD
MnBe 29mg/l, pH=8.2 adopts treatment process of the present invention that this PVC sewage is handled.
At first, in every liter of sewage, add 30mg potassium ferrate and 50mg polyaluminum sulfate ferrosilicon, carry out oxidation absorption reaction 30min after, enter settling tank and adopt eddy flow technology to carry out solid-liquid separation, the eddy flow hydraulic detention time is 20min; Enter flotation machine through the post precipitation water outlet, in every liter of sewage, add 10mg dioxide peroxide and 10mg ozone simultaneously, after carrying out oxidizing reaction 10min, enter the active carbon filtration jar, hydraulic detention time at activated carbon canister is 45min, organism in the sewage is adsorbed, and can destroy ozone and dioxide peroxide; Water outlet enters film filter behind active carbon filtration, and the filtrate discharge that obtains is in environment.
Water outlet COD after above-mentioned art breading
Mn＜10mg/l, specific conductivity＜900us/cm, pH:6.5～7.5 have reached the water coolant standard.
Claims (9)
1, a kind of treatment process that is used for waste water of PVC production has adopted the treatment process based on the combined two-stage chemical oxidation of oxidation absorption-solid-liquid separation-secondary chemical oxidation-active carbon filtration-fine filtering.
2, the treatment process that is used for waste water of PVC production as claimed in claim 1 comprises following step:
1), simultaneously or add 50～350mg/l ferric flocculant, carries out oxidation absorption reaction 2～30min to the oxygenant I of the middle adding 10～50mg/l of waste water of PVC production in batches;
Described oxygenant I is selected from permanganate, ferrate, perchlorate, superoxide and the ozone one or more;
Described ferric flocculant is to be selected from bodied ferric sulfate, polyaluminum sulfate ferrosilicon, ferric sulfate, iron(ic) chloride, the poly-ferric chloride one or more;
2) solid-liquid separation is carried out in the water outlet of step 1);
3) to step 2) water outlet after the solid-liquid separation adds 5～50mg/l oxygenant II, is at least the oxidizing reaction of 5min;
Described oxygenant II is that ozone is or/and dioxide peroxide;
4) with water outlet hydraulic retention 2～45min in charcoal filter of step 3);
5) water outlet with step 4) enters fine filter, and the filtrate discharge that obtains is in environment.
3, the treatment process that is used for waste water of PVC production as claimed in claim 2 is characterized in that: solid-liquid separation described step 2) adopts air supporting, precipitation or eddy flow technology.
4, the treatment process that is used for waste water of PVC production as claimed in claim 3 is characterized in that: described air supporting hydraulic detention time is 10～30min.
5, the treatment process that is used for waste water of PVC production as claimed in claim 3 is characterized in that: described precipitation hydraulic detention time is 2～8 hours.
6, the treatment process that is used for waste water of PVC production as claimed in claim 3 is characterized in that: described eddy flow hydraulic detention time is 5～30min.
7, the treatment process that is used for waste water of PVC production as claimed in claim 2 is characterized in that: described step 2) also can add flocculation agent when carrying out solid-liquid separation, add-on is 2～8mg/l.
8, the treatment process that is used for waste water of PVC production as claimed in claim 2 is characterized in that: the reactor that carries out oxidizing reaction in the described step 3) comprises bubble tower, sieve-tray tower, flotation machine or Cyclonic reactor.
9, the treatment process that is used for waste water of PVC production as claimed in claim 2 is characterized in that: the fine filter in the described step 5) comprises sand-bed filter, security personnel's strainer, fabric filter, film filter or metallic filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101352085A CN100441528C (en) | 2005-12-27 | 2005-12-27 | Treatment process for waste water of PVC production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101352085A CN100441528C (en) | 2005-12-27 | 2005-12-27 | Treatment process for waste water of PVC production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1990396A true CN1990396A (en) | 2007-07-04 |
| CN100441528C CN100441528C (en) | 2008-12-10 |
Family
ID=38212978
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101352085A Active CN100441528C (en) | 2005-12-27 | 2005-12-27 | Treatment process for waste water of PVC production |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102583879A (en) * | 2012-01-16 | 2012-07-18 | 宁波工程学院 | High-concentration integrated chemical organic wastewater treatment process |
| CN102718337A (en) * | 2011-03-31 | 2012-10-10 | 中国科学院生态环境研究中心 | Processing method for leatherworking waste water |
| CN103708651A (en) * | 2013-12-31 | 2014-04-09 | 浙江大学 | Degradation-resistant high-chlorine alkaline waste water treatment method |
| CN104944641A (en) * | 2015-06-24 | 2015-09-30 | 青岛大学 | Device and method for physical chemical treatment of reactive dye waste water |
| CN107963744A (en) * | 2017-11-22 | 2018-04-27 | 苏州赛比膜分离科技有限公司 | A kind of sewage treatment process |
| CN108483707A (en) * | 2018-03-15 | 2018-09-04 | 淄博明奇净水材料有限公司 | A kind of sewage purifying treatment process of efficient process waste water containing PVA |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1105685C (en) * | 1998-04-07 | 2003-04-16 | 中国石化齐鲁石油化工公司 | Process for treating waste water of polyvinyl chloride |
| KR100505457B1 (en) * | 2003-04-09 | 2005-07-29 | 한화석유화학 주식회사 | Recycling method of waste water |
| CN1546403A (en) * | 2003-12-04 | 2004-11-17 | 澎 王 | Regeneration cycle applied technique for waste water from polyvinyl chloride industry |
-
2005
- 2005-12-27 CN CNB2005101352085A patent/CN100441528C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718337A (en) * | 2011-03-31 | 2012-10-10 | 中国科学院生态环境研究中心 | Processing method for leatherworking waste water |
| CN102583879A (en) * | 2012-01-16 | 2012-07-18 | 宁波工程学院 | High-concentration integrated chemical organic wastewater treatment process |
| CN103708651A (en) * | 2013-12-31 | 2014-04-09 | 浙江大学 | Degradation-resistant high-chlorine alkaline waste water treatment method |
| CN103708651B (en) * | 2013-12-31 | 2016-01-20 | 浙江大学 | A kind for the treatment of process of high chlor-alkali used water difficult to degradate |
| CN104944641A (en) * | 2015-06-24 | 2015-09-30 | 青岛大学 | Device and method for physical chemical treatment of reactive dye waste water |
| CN104944641B (en) * | 2015-06-24 | 2017-03-29 | 青岛大学 | A kind of apparatus for physical Chemical treating and method of active dye wastewater |
| CN107963744A (en) * | 2017-11-22 | 2018-04-27 | 苏州赛比膜分离科技有限公司 | A kind of sewage treatment process |
| CN108483707A (en) * | 2018-03-15 | 2018-09-04 | 淄博明奇净水材料有限公司 | A kind of sewage purifying treatment process of efficient process waste water containing PVA |
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| Publication number | Publication date |
|---|---|
| CN100441528C (en) | 2008-12-10 |
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Owner name: BEIJING INTERCHINA KECHUANG ENVIRONMENT TECHNOLOGY Free format text: FORMER OWNER: ECOLOGY RESEARCHING CENTER, CHINESE ACADEMY OF SCIENCES Effective date: 20150327 |
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Effective date of registration: 20150327 Address after: 101100 Beijing city Tongzhou District Financial Street Road No. 6 elm King Garden Park Building No. 27 hospital Patentee after: BEIJING GUOZHONG KECHUANG ENVIRONMENTAL SCIENCE & TECHNOLOGY CO., LTD. Address before: 100085 Beijing city Haidian District Shuangqing Road No. 18 Patentee before: Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences |