CN102936074B - Pretreatment method of epoxy type plasticizer production wastewater - Google Patents
Pretreatment method of epoxy type plasticizer production wastewater Download PDFInfo
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- CN102936074B CN102936074B CN201210512493.8A CN201210512493A CN102936074B CN 102936074 B CN102936074 B CN 102936074B CN 201210512493 A CN201210512493 A CN 201210512493A CN 102936074 B CN102936074 B CN 102936074B
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- waste water
- wastewater
- hydrogen peroxide
- air
- pretreatment method
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- 239000002351 wastewater Substances 0.000 title claims abstract description 45
- 239000004593 Epoxy Substances 0.000 title claims abstract description 17
- 239000004014 plasticizer Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000002203 pretreatment Methods 0.000 title claims abstract description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 9
- 239000011572 manganese Substances 0.000 claims abstract description 9
- 239000004576 sand Substances 0.000 claims abstract description 9
- 238000005273 aeration Methods 0.000 claims abstract description 6
- 239000006004 Quartz sand Substances 0.000 claims abstract description 4
- 230000020477 pH reduction Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 13
- 239000004519 grease Substances 0.000 claims description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000009287 sand filtration Methods 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- 238000005188 flotation Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- 238000010992 reflux Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 238000004448 titration Methods 0.000 claims description 2
- 239000003513 alkali Substances 0.000 abstract description 5
- 229920002401 polyacrylamide Polymers 0.000 abstract description 4
- 239000010802 sludge Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 125000000129 anionic group Chemical group 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 abstract 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 10
- 235000019198 oils Nutrition 0.000 description 10
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 102000004895 Lipoproteins Human genes 0.000 description 1
- 108090001030 Lipoproteins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention provides a pretreatment method of epoxy type plasticizer production wastewater. The pretreatment method is characterized by comprising the following specific steps: step one, conducting acidification and demulsification on the epoxy type plasticizer production wastewater, conducting microporous aeration and oil removal firstly, removing oil by utilizing a full-automatic oil scraper, and adjusting the pH value of wastewater to be 4.5-5.5; and step two, pumping the wastewater treated by the step one into an air floatation device for air floatation treatment, wherein the chemical adding sequence in the operation of the air floatation device is as follows: adding polymeric aluminum firstly, then adding alkali liquor to adjust the pH value to be 7.5-8.5, and finally adding anionic polyacrylamide, and water discharged from the air floatation device is filtered by quartz sand; and step three, filling the wastewater treated in the step two to be full of a natural manganese sand filter tank by a mode of feeding from the lower part and the discharging from the upper part so as to remove residual hydrogen peroxide in the wastewater to obtain the pre-treated epoxy type plasticizer production wastewater. The pretreatment method has the advantages that the oil can be removed thoroughly, floatation slag generated by air floatation is obvious, the volume of the floatation slag is small after the floatation slag is discharged into a sludge drying bed to be concentrated, the treatment is easy and the like.
Description
Technical field
The present invention relates to a kind of pretreatment process of epoxy plasticiser factory effluent.
Background technology
In epoxy plasticiser factory effluent, contain the pollutents such as formic acid, hydrogen peroxide, grease, be difficult to conventional method processing.As the pre-treatment before biochemical treatment, the most key is to remove residual grease and hydrogen peroxide in waste water, and waste water is neutralized to neutrality.
At present the domestic general treatment process to this organic waste water is: oil removal (comprising breakdown of emulsion)-> Fenton oxidation-> neutralization-> press filtration (or after precipitating as sludge press filtration).For utilizing residual hydrogen peroxide in waste water to be oxidized waste water, although obtained good treatment effect, also there are a lot of drawbacks simultaneously in the principle of this method:
<1> oil removing is not thorough, and in waste water, residual grease mainly relies on sludge absorption;
<2> sludge yield is large, and ferrous sulfate addition is generally 0.5%～2.0%.
And oil removal by air bubbling is a kind of more traditional method of wastewater treatment, its principle is to become floating matter by discharging in thin small and scattered bubble adhesion waste water soluble in water through dispersed oil and the suspended substance of flocculation agent cohesion, thereby oil is separated from waste water with suspended substance.But water outlet muddiness while being applied to such waste water, grease cannot eliminate.
Summary of the invention
The object of this invention is to provide a kind of pretreatment process of more effective epoxy plasticiser factory effluent, it improves traditional oil removal by air bubbling technique, and optimized except hydrogen peroxide method, can thoroughly remove grease and hydrogen peroxide in waste water, be more conducive to follow-up biochemical treatment.
In order to achieve the above object, the invention provides a kind of pretreatment process of epoxy plasticiser factory effluent, it is characterized in that, concrete steps are:
The first step: epoxy plasticiser factory effluent is carried out after Production Wastewater By Combined Acidification And Demulsification, first carry out micro-pore aeration oil removing, then skim grease with full-automatic Oil scraper, waste water ph is adjusted to 4.5-5.5 with sodium carbonate;
Second step: will pump into air-floating apparatus through the first step waste water after treatment and carry out air supporting processing, the operating order of addition of ingredients of air-floating apparatus is: first add polymerize aluminum chloride (PAC), add again alkali lye that pH value is adjusted to 7.5-8.5, finally add again anionic polyacrylamide (PAM), the water outlet quartz sand filtration of air-floating apparatus;
The 3rd step: by through second step waste water after treatment in the mode of bottom in and top out by filling up the filter tank of natural manganese sand, to remove hydrogen peroxide residual in waste water, obtain pretreated epoxy plasticiser factory effluent.
Preferably, in described the 3rd step, the diameter of manganese sand filtering material is 2-5mm, and the aspect ratio of filter tank is 2: 1, and the residence time of waste water in filter tank is 5～10h.
Compared with prior art, the invention has the beneficial effects as follows:
1, the present invention has adopted and has first added PAC in the time of air supporting, then adjusts the method for pH.The principle of this method is: after meeting alkali containing the waste water of Vegetable oil lipoprotein, can form milky soap, cause water outlet muddiness; Under solutions of weak acidity, PAC cannot form good flco, in the time that PAC meets alkali, than grease preferential reaction, forms compared with big flocculating body, grease can be wrapped up, and prevents grease and alkali effect.
2, the present invention uses the natural manganese sand of diameter 2-5mm as filter tank, for removing the residual hydrogen peroxide of waste water, can thoroughly remove the hydrogen peroxide in waste water.The main component of manganese sand is Manganse Dioxide, is generally used in underground water deferrization and demanganization, does not use it for the report of waste water except hydrogen peroxide in prior art.
Brief description of the drawings
Fig. 1 is the processing flow chart of embodiment 1.
Embodiment
Illustrate the present invention below in conjunction with embodiment.
Embodiment 1
As shown in Figure 1, the concrete steps of the pretreatment process of epoxy plasticiser factory effluent are:
(1) by epoxy plasticiser factory effluent (the about 500ppm of fat content, hydrogen peroxide concentration 0.8%, pH value is 4) inject oil trap, add 30% salt acid for adjusting pH to 3 to carry out Production Wastewater By Combined Acidification And Demulsification, after regulating, waste water is squeezed in equalizing tank, and unlatching blower fan carries out micro-pore aeration and deoils, and the time of micro-pore aeration is 3 hours, open subsequently full-automatic Oil scraper and skim grease, after frizing is thorough, add appropriate sodium carbonate that waste water ph is adjusted to 5, enter next step;
(2) waste water is pumped into horizontal flow air flotation device.Open air-floating apparatus and carry out air supporting processing, the concrete operations condition of air supporting processing is: container tank pressure 0.3Mpa, reflux ratio 20%, waste water pumps into the first dosing tank and adds the PAC of 40ppm, then flow automatically to the second dosing tank and add 30% sodium hydroxide solution that the pH of waste water is adjusted to 8, finally flow automatically to the 3rd dosing tank and add the negatively charged ion PAM of 5ppm, the scum silica frost of generation is skimmed with scraper plate.Quartz sand filtration is used in air supporting water outlet again, except anhydrating middle residual impurity.This workshop section water outlet oleaginousness is less than 50ppm.
(3) by the water outlet of air-floating apparatus (pH value > 7, hydrogen peroxide concentration < 2%) in the mode of bottom in and top out by filling up the filter tank of natural manganese sand, to remove residual hydrogen peroxide in waste water, the diameter of manganese sand filtering material is 3mm, the aspect ratio of filter tank is 2: 1, the residence time of waste water in filter tank is 5h, obtain pretreated epoxy plasticiser factory effluent, the acid permanganate soln titration of water outlet hydrogen peroxide concentration, numerical value is less than 0.05%.
After pre-treatment, the waste water of gained is carried out can reaching emission standard (COD < 500mg/L, pH6-9) after conventional biochemical treatment.
Claims (1)
1. a pretreatment process for epoxy plasticiser factory effluent, is characterized in that, concrete steps are:
The first step: the epoxy plasticiser factory effluent that is 4 by fat content 500ppm, hydrogen peroxide concentration 0.8%, pH value injects oil trap, add 30% salt acid for adjusting pH to 3 to carry out Production Wastewater By Combined Acidification And Demulsification, after regulating, waste water is squeezed in equalizing tank, and unlatching blower fan carries out micro-pore aeration and deoils, and the micro-pore aeration time is 3 hours, open subsequently full-automatic Oil scraper and skim grease, after frizing is thorough, add appropriate sodium carbonate that waste water ph is adjusted to 5, enter next step;
Second step: waste water is pumped into horizontal flow air flotation device, open air-floating apparatus and carry out air supporting processing, the concrete operations condition of air supporting processing is: container tank pressure 0.3Mpa, reflux ratio 20%, waste water pumps into the first dosing tank and adds the PAC of 40ppm, then flow automatically to the second dosing tank and add 30% sodium hydroxide solution that the pH of waste water is adjusted to 8, finally flow automatically to the 3rd dosing tank and add the negatively charged ion PAM of 5ppm, the scum silica frost producing is skimmed with scraper plate, quartz sand filtration is used in air supporting water outlet again, except anhydrating middle residual impurity; This workshop section water outlet oleaginousness is less than 50ppm;
The 3rd step: by the water outlet of the air-floating apparatus of pH value > 7, hydrogen peroxide concentration < 2% in the mode of bottom in and top out by filling up the filter tank of natural manganese sand, to remove hydrogen peroxide residual in waste water, the diameter of manganese sand filtering material is 3mm, the aspect ratio of filter tank is 2:1, the residence time of waste water in filter tank is 5h, obtain pretreated epoxy plasticiser factory effluent, the acid permanganate soln titration of water outlet hydrogen peroxide concentration, numerical value is less than 0.05%; After pre-treatment, the waste water of gained is carried out after conventional biochemical treatment, can reaching emission standard COD<500mg/L, pH 6-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210512493.8A CN102936074B (en) | 2012-12-03 | 2012-12-03 | Pretreatment method of epoxy type plasticizer production wastewater |
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| CN201210512493.8A CN102936074B (en) | 2012-12-03 | 2012-12-03 | Pretreatment method of epoxy type plasticizer production wastewater |
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| Publication Number | Publication Date |
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| CN102936074A CN102936074A (en) | 2013-02-20 |
| CN102936074B true CN102936074B (en) | 2014-11-26 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103265148A (en) * | 2013-06-07 | 2013-08-28 | 文建方 | Method for treating wastewater in epoxy plasticizer production |
| CN103663793B (en) * | 2013-12-12 | 2014-12-17 | 中国航空规划建设发展有限公司 | High-concentration emulsified liquid wastewater treatment method |
| CN103894231B (en) * | 2014-03-04 | 2016-01-20 | 浙江嘉澳环保科技股份有限公司 | The method of reverse micelle nano aluminium oxide catalyst system and catalyzing and synthesis modification epoxy plasticizer |
| CN104291526B (en) * | 2014-09-30 | 2016-05-18 | 浙江嘉澳环保科技股份有限公司 | A kind of epoxy plasticizer method of wastewater treatment that can improve biochemical sludge performance |
| CN104671480A (en) * | 2015-01-21 | 2015-06-03 | 梁亨 | Treatment method for plastic plasticizer production waste liquid |
| CN104609666A (en) * | 2015-01-21 | 2015-05-13 | 梁亨 | Treatment method for liquid waste from production of plasticizer for chemical industry |
| CN110627189A (en) * | 2019-10-12 | 2019-12-31 | 博天环境集团股份有限公司 | Wastewater treatment reaction device and wastewater treatment method |
| CN112010503B (en) * | 2020-08-28 | 2022-04-22 | 英德市城泰化工有限公司 | Treatment process of liquid cyclohexanone peroxide production wastewater |
| CN116282700A (en) * | 2023-03-13 | 2023-06-23 | 安徽新鸿药业有限公司 | Plasticizer wastewater treatment system and treatment method |
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