CN108341536A - A kind of processing method of epoxy resin production waste-water - Google Patents
A kind of processing method of epoxy resin production waste-water Download PDFInfo
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- CN108341536A CN108341536A CN201810149253.3A CN201810149253A CN108341536A CN 108341536 A CN108341536 A CN 108341536A CN 201810149253 A CN201810149253 A CN 201810149253A CN 108341536 A CN108341536 A CN 108341536A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/26—Treatment of water, waste water, or sewage by extraction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The invention belongs to technical field of sewage, and in particular to a kind of processing method of epoxy resin production waste-water.Pending epoxy resin waste-water removes wherein big suspended contamination through grid, through coagulation, extraction, electrodialysis desalination, Fenton oxidation, flash distillation, decoloration, refined filtration processing after and, pass through physics, the combination of chemical method, brine after organic matter removal in high-salt wastewater is directly recycled, it is cost-effective, while the present invention has many advantages, such as that energy consumption is small, elimination capacity is high, effluent quality is good after purification.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of processing method of epoxy resin production waste-water.
Background technology
At the same time China's epoxy resin Industry Quick Development in recent years generates a large amount of high salt organic waste water.Such is useless
Water harnessing difficulty is very big, it has also become restricts the bottleneck of epoxy resin industry value chain.Due to excessive epoxychloropropane, mistake
The presence of the sodium hydroxide and toluene of amount so that waste component is complicated, and useless impurities in water main component is：Toluene, aged resin,
The high poly- suspended matter of epoxy resin, glycerine, glycerin chlorohydrin, sodium hydroxide, dimethylbenzene, sodium chloride, emulsifier etc..
Currently, the high saliferous of the effective epoxy resin in the country, high organic wastewater conventional treatment process usually will be high
Saliferous, high organic wastewater first carry out standing oil removal, separate oily organic matter and aged resin or with air-floating apparatus by suspension
Contaminant removal, lower layer's waste water through being concentrated by evaporation, crystallizing centrifugation, are recycled salt, centrifuge mother liquor loops back to effect steaming again
Send out device, water scouring water of the indirect steam condensed water as epoxy resin finished product.Pretreating effect before this method multiple-effect evaporation is paid no attention to
Think, causes multiple-effect evaporation efficiency and operational reliability poor, the cleaning frequency is short.Secondly gained salt poor quality, cannot obtain high-quality work
Industry salt, deficiency in economic performance, steam consumption are big.In addition, the water-soluble organic impurities of the method does not have in the multiple-effect evaporation circulatory system
Outlet, with the long-term recycled of mother liquor, the stability and need that can influence multiple-effect evaporation production periodically will be containing evaporations with high salt
Raffinate carries out burning disposal with special incinerator, and processing cost is high.
A kind of preprocess method this method of 201110446403.5 epoxy resin desalinization wastewater of Chinese invention patent is first
Waste water is settled one day and then adjusts pH value, is further evaporated by reaction kettle, then goes to clean using plate and frame filter press
Matter.The patent is needed waste water natural subsidence one day, and is difficult the big rule of reply using this processing mode of plate and frame type filter-press
The production requirement of mould.
Process for recovery of high concentration disclosed in Chinese patent CN92113481.9, technical process are：First by crystallizing
Tank processing, evaporation make brine supersaturation and precipitate crystal, be then separated by solid-liquid separation, obtain the salt for being attached with organic matter, heated
So that the organic matter on surface is evaporated, promote reaction of decomposing, organic carbon is destroyed, carbon slag is become, is then re-dissolved in water, passes through
Filter makes brine detach, purify with carbon slag.Due to not carrying out impurity elimination with concentration before the separation without organic phase, and concentration, thus
Gained salt is complex in composition, poor practicability, and when concentration can cause evaporation efficiency to reduce, and shorten the service life of evaporator.
Invention content
The technical problem to be solved in the present invention is to provide a kind of epoxy resin cost-effective, energy consumption is small, elimination capacity is high
Produce the processing method of waste water.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of processing method of epoxy resin production waste-water, it is characterised in that：Including following processing step：
(1) pending epoxy resin waste-water removes wherein big suspended contamination through grid；
(2) processed waste water, which enters, carries out oil removal treatment in coagulation oil removing pot, ferrous sulfate or chlorine are added in processing procedure
Change ferrous coagulant, mixed in pipeline, then entered in oil removing pot with tangential direction through water inlet pipe and reacted, reaction when
Between be 5-12min, the residence time be 2-5 hours；
(3) through extractant is added in step (2) processed waste water, the organic phase on extraction and separation upper layer returns to production of resins work
It is recycled in sequence；
(4) enter in electrodialysis desalination system through step (3) processed waste water and remove salt treatment, electrodialysis uses
0.5mm partition boards；
(5) it is firstly added salt acid for adjusting pH value 1.5-4.5 through step (4) processed waste water, ferrous and hydrogen peroxide is added
Fenton's reaction is carried out, the ferrous molar ratio with hydrogen peroxide is 0.02-0.6 in the reaction step；Reaction is controlled in reaction process
Temperature is 85-95 DEG C.
(6) processed waste water enters evaporating kettle and carries out flash distillation process, and flash distillation control pressure is 18-32KPa, and temperature is higher than
75℃；
(7) waste water by step (6) processing, which enters, carries out decolorization in decolouring pond, wherein the decolorising agent used is work
Property charcoal or Concave-convex clay rod；
(8) refined filtration processing, treated discharged wastewater met the national standard or reuse are carried out through step (7) treated waste water.It is described
The addition of ferrous sulfate or frerrous chloride is 5-7ml/L.
Extractant wherein employed in step (3) is dimethylbenzene, pseudocumene, ethylbenzene or acetone.
Ferrous iron and hydrogen peroxide wherein in step (5) add in batches, and the time interval added is 5-8min.Wherein
Refined filtration described in step (8) using PE micropore fine filtrations device, polyether sulfone filter core, one kind in microporous barrier cartridge filter or
It is a variety of.
Compared with prior art, beneficial effects of the present invention are：Ferrous sulfate or chlorine is added in pending waste water in pipeline
Change ferrous coagulant to be mixed so that the oils in waste water be uniformly mixed with coagulant and after through water inlet pipe with tangential direction into
Enter reaction in oil removing pot so that coagulation deoiling effect is more preferably；Then pass through the toluene class organic phase reuse in extraction and recovery waste water；
Reaction temperature control during Fenton's reaction is 75-85 DEG C, and add using dosing in batches by the way of ferrous iron and
Hydrogen peroxide can promote hydrogen peroxide at the uniform velocity to decompose, so as to generation hydroxyl radical free radical at the uniform velocity, to enhance at Fenton
Manage effect；
Meanwhile suitable temperature, nothing are provided for follow-up flash distillation process during Fenton's reaction controlled at 75-85 DEG C
Additional energy expenditure is needed to enhance the treatment effect of waste water to improve the treatment effeciency of whole processing technology.The present invention passes through
The combination of physics, chemical method directly recycles brine after the organic matter removal in high-salt wastewater, cost-effective, simultaneously
The present invention has many advantages, such as that energy consumption is small, elimination capacity is high, effluent quality is good after purification.
Description of the drawings
Fig. 1 is the processing technological flow figure of the epoxy resin production waste-water of the present invention.
Specific implementation mode
Embodiment 1
COD is 3200mg/L, TOC 2200mg/L in pending epoxy resin production waste-water.
Pending epoxy resin waste-water removes wherein big suspended contamination through grid；Processed waste water enters coagulation oil removing
Carry out oil removal treatment in tank, frerrous chloride 5ml/L be added in processing procedure, is mixed in pipeline, then through water inlet pipe with
Tangential direction enters reaction in oil removing pot, and the time of reaction is 5min, and the residence time is 2 hours；Two are added in processed waste water
Toluene extractant, the organic phase on extraction and separation upper layer returns to be recycled in production of resins process；Processed waste water enters electric osmose
It carries out removing salt treatment in analysis desalting system, electrodialysis uses 0.5mm partition boards；Processed waste water is firstly added salt acid for adjusting pH value
1.5, ferrous and hydrogen peroxide is added and carries out Fenton's reaction, the ferrous molar ratio with hydrogen peroxide is 0.02 in the reaction step；
Controlling reaction temperature is 85 DEG C in reaction process.Processed waste water enters evaporating kettle and carries out flash distillation process, flashes control pressure
For 20KPa, temperature control is 80 DEG C；The waste water of processing, which enters, carries out decolorization in decolouring pond, wherein the decolorising agent used for
Activated carbon；Treated, and waste water carries out the processing of PE micropore fine filtration devices, and COD is 105mg/L in processed waste water, and removal rate is
96.7%, TOC 45mg/L, removal rate 98% meet the discharge standard of resin industry production waste water.
Embodiment 2
COD is 2500mg/L, TOC 1800mg/L in pending epoxy resin production waste-water.
Pending epoxy resin waste-water removes wherein big suspended contamination through grid；Processed waste water enters coagulation oil removing
Carry out oil removal treatment in tank, ferrous sulfate 5ml/L be added in processing procedure, is mixed in pipeline, then through water inlet pipe with
Tangential direction enters reaction in oil removing pot, and the time of reaction is 7min, and the residence time is 3 hours；Two are added in processed waste water
Toluene extractant, the organic phase on extraction and separation upper layer returns to be recycled in production of resins process；Processed waste water enters electric osmose
It carries out removing salt treatment in analysis desalting system, electrodialysis uses 0.5mm partition boards；Processed waste water is firstly added salt acid for adjusting pH value
1.5, ferrous and hydrogen peroxide is added and carries out Fenton's reaction, the ferrous molar ratio with hydrogen peroxide is 0.1 in the reaction step；Instead
Controlling reaction temperature is 88 DEG C during answering.Processed waste water enters evaporating kettle and carries out flash distillation process, and flash distillation control pressure is
20KPa, temperature control are 78 DEG C；The waste water of processing, which enters, carries out decolorization in decolouring pond, wherein the decolorising agent used is work
Property charcoal；Treated, and waste water carries out the processing of PE micropore fine filtration devices, and COD is 35mg/L in processed waste water, and removal rate is
98.6%, TOC 20mg/L, removal rate 98.9% meet the discharge standard of resin industry production waste water.
Embodiment 3
COD is 1000mg/L, TOC 500mg/L in pending epoxy resin production waste-water.
Pending epoxy resin waste-water removes wherein big suspended contamination through grid；Processed waste water enters coagulation oil removing
Carry out oil removal treatment in tank, ferrous sulfate 5ml/L be added in processing procedure, is mixed in pipeline, then through water inlet pipe with
Tangential direction enters reaction in oil removing pot, and the time of reaction is 5min, and the residence time is 2 hours；Two are added in processed waste water
Toluene extractant, the organic phase on extraction and separation upper layer returns to be recycled in production of resins process；Processed waste water enters electric osmose
It carries out removing salt treatment in analysis desalting system, electrodialysis uses 0.5mm partition boards；Processed waste water is firstly added salt acid for adjusting pH value
1.7, ferrous and hydrogen peroxide is added and carries out Fenton's reaction, the ferrous molar ratio with hydrogen peroxide is 0.2 in the reaction step；Instead
Controlling reaction temperature is 95 DEG C during answering.Processed waste water enters evaporating kettle and carries out flash distillation process, and flash distillation control pressure is
20KPa, temperature control are 85 DEG C；The waste water of processing, which enters, carries out decolorization in decolouring pond, wherein the decolorising agent used is work
Property charcoal；Treated, and waste water carries out the processing of PE micropore fine filtration devices, and COD is 20mg/L in processed waste water, and removal rate is
98%, TOC 15mg/L, removal rate 97% meet the discharge standard of resin industry production waste water.
Claims (5)
1. a kind of processing method of epoxy resin production waste-water, it is characterised in that：Including following processing step：
(1) pending epoxy resin waste-water removes wherein big suspended contamination through grid；
(2) processed waste water, which enters, carries out oil removal treatment in coagulation oil removing pot, ferrous sulfate or protochloride are added in processing procedure
Iron coagulant, is mixed in pipeline, is then entered in oil removing pot with tangential direction through water inlet pipe and is reacted, and the time of reaction is
5-12min, residence time are 2-5 hours；
(3) through extractant is added in step (2) processed waste water, the organic phase on extraction and separation upper layer returns in production of resins process
It recycles；
(4) enter in electrodialysis desalination system through step (3) processed waste water carry out remove salt treatment, electrodialysis using 0.5mm every
Plate；
(5) it is firstly added salt acid for adjusting pH value 1.5-4.5 through step (4) processed waste water, ferrous and hydrogen peroxide is added and carries out
Fenton's reaction, the ferrous molar ratio with hydrogen peroxide is 0.02-0.6 in the reaction step；Controlling reaction temperature in reaction process
It is 85-95 DEG C.
(6) processed waste water enters evaporating kettle and carries out flash distillation process, and flash distillation control pressure is 18-32KPa, and temperature is higher than 75
℃；
(7) waste water by step (6) processing, which enters, carries out decolorization in decolouring pond, wherein the decolorising agent used is activated carbon
Or Concave-convex clay rod；
(8) refined filtration processing, treated discharged wastewater met the national standard or reuse are carried out through step (7) treated waste water.
2. the processing method of epoxy resin production waste-water as described in claim 1, it is characterised in that：The ferrous sulfate or chlorine
It is 5-7ml/L to change ferrous addition.
3. the processing method of epoxy resin production waste-water as described in claim 1, it is characterised in that：Wherein institute in step (3)
The extractant used is dimethylbenzene, pseudocumene, ethylbenzene or acetone.
4. the processing method of epoxy resin production waste-water as described in claim 1, it is characterised in that：Wherein in step (5)
Ferrous and hydrogen peroxide adds in batches, and the time interval added is 5-8min.
5. the processing method of epoxy resin production waste-water as described in claim 1, it is characterised in that：Wherein institute in step (8)
The refined filtration stated is using one or more in PE micropore fine filtrations device, polyether sulfone filter core, microporous barrier cartridge filter.
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| CN201810149253.3A CN108341536B (en) | 2018-02-12 | 2018-02-12 | Treatment method of epoxy resin production wastewater |
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| CN201810149253.3A CN108341536B (en) | 2018-02-12 | 2018-02-12 | Treatment method of epoxy resin production wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348795A (en) * | 2020-03-26 | 2020-06-30 | 福州大学 | Electrodialysis-based PTA refining wastewater resource recycling device and method |
| CN111592167A (en) * | 2020-06-02 | 2020-08-28 | 江苏扬农化工集团有限公司 | Method for treating epoxy resin high-salinity wastewater |
| CN113636667A (en) * | 2021-08-20 | 2021-11-12 | 无锡厚德石化工程设计有限公司 | Separation process of aged resin-containing wastewater in epoxy resin production |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348795A (en) * | 2020-03-26 | 2020-06-30 | 福州大学 | Electrodialysis-based PTA refining wastewater resource recycling device and method |
| CN111592167A (en) * | 2020-06-02 | 2020-08-28 | 江苏扬农化工集团有限公司 | Method for treating epoxy resin high-salinity wastewater |
| CN113636667A (en) * | 2021-08-20 | 2021-11-12 | 无锡厚德石化工程设计有限公司 | Separation process of aged resin-containing wastewater in epoxy resin production |
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| CN108341536B (en) | 2020-08-14 |
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