CN104926010A - Acetic acid wastewater treatment technology - Google Patents
Acetic acid wastewater treatment technology Download PDFInfo
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- CN104926010A CN104926010A CN201510351480.0A CN201510351480A CN104926010A CN 104926010 A CN104926010 A CN 104926010A CN 201510351480 A CN201510351480 A CN 201510351480A CN 104926010 A CN104926010 A CN 104926010A
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- acetic acid
- waste water
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- membrane
- concentrated solution
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to an acetic acid wastewater treatment technology which includes the following steps of 1), for pretreatment, controlling temperature of wastewater 10-15wt% in acetic acid concentration and generated during production to be under 40DEG C and removing suspended solids and precipitates after filtering with a cloth bag filter and a hollow fiber ultrafiltration membrane in sequence; 2), for membrane separation, repeatedly concentrating the acetic acid wastewater obtained in the step 1) with a pollution-resisting nanofilatration membrane to further recycle acetic acid in the wastewater to enable the concentration of the acetic acid in a finally-discharged concentrated solution to reach by 40wt%, and returning a diluent to the step 1) to be recycled; 3), for aftertreatment, subjecting the concentrated solution obtained from the step 2) to distillation purification to obtain the acetic acid to be recycled. The acetic acid wastewater treatment technology has the advantages that concentration is performed under the constant temperature, biological activity of a target product is unaffected, permeable liquid can be taken as technology water to be recycled in the production technology, energy sources are saved, energy consumption is lowered, and considerable economic benefit and good social benefit can be directly created for enterprises.
Description
Technical field
The present invention relates to a kind for the treatment of process of waste water, particularly relate to a kind for the treatment of process of waste water, belong to field of waste water treatment.
Background technology
Acetic acid is a kind of important industrial chemicals, is widely used in the industrial circles such as chemical industry, light textile, medicine, dyestuff.The acetic acid containing waste water produced in the Chemical Manufacture of makeup intermediate and pharmaceutical intermediate etc., if do not carry out recycling or treatment process improper, not only can pollute, also production cost can be increased, if can effectively process, for aspect important in inhibitings such as the control of polluting, economic benefit and sustainable developments.
The method of recovery of acetic acid from waste water of existing bibliographical information has: conventional distillation method, azeotropic distillation, solvent extration, esterification process etc., rectification method is generally applicable to the recovery of high density acetic acid, for the acetum of lower concentration, rectificating method is adopted to be uneconomic, solvent extration and esterification process unsatisfactory for the recovering effect of low-concentration acetic acid, the rate of recovery is low, and therefore, people are seeking the recovery of more cost-effective method realization to acetic acid in waste water always.
Summary of the invention
The present invention is directed to the deficiency of acetic acid recovery method in existing waste water, a kind for the treatment of process of waste water is provided.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind for the treatment of process of acetic acid containing waste water, is characterized in that, comprises the steps:
1) pre-treatment: by the acetate concentration that production process produces be the waste water control temperature of 10 ~ 15wt% below 40 DEG C, under the effect of raw water pump successively after cloth envelop collector and hollow fiber ultrafiltration membrane are filtered, removing suspended substance wherein and precipitate;
2) membrane sepn: by step 1) in gained acetic acid containing waste water pressurization after with the antipollution nanofiltration membrane concentrated acetic acid reclaimed further in waste water repeatedly, make the concentration of the acetic acid in last concentrated solution of discharging reach 40wt%;
3) aftertreatment: by step 2) in the concentrated solution of gained through rectification and purification, gained acetic acid recovery uses.
The invention has the beneficial effects as follows: pass through membrane separation technique, Dichlorodiphenyl Acetate waste water carries out concentrating and separating recovery at normal temperatures, the water in acetic acid and other impurity can be removed, improve acetic acid quality concentration, compared with traditional evaporation concentration, carry out the concentrated biological activity not affecting target product at normal temperatures, permeate can be back in production technique as process water, save energy, reduces energy consumption, directly for enterprise creates considerable economic benefit and good social benefit.
On the basis of technique scheme, the present invention can also do following improvement.
Further, step 1) described in the filtering accuracy of cloth envelop collector be 20um.
The beneficial effect of above-mentioned further scheme is adopted to be, acetic acid recovery better effects if.
Further, step 1) described in hollow fiber ultrafiltration membrane be made up of tetrafluoroethylene.
Accompanying drawing explanation
Fig. 1 is acetic acid containing waste water treating processes schematic diagram of the present invention;
Embodiment
Be described principle of the present invention and feature below in conjunction with example, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1:
As shown in Figure 1, a kind for the treatment of process of acetic acid containing waste water, first acetate concentration production process produced is that the waste water control temperature of 10 ~ 15wt% is below 40 DEG C, under the effect of raw water pump, precision is after the cloth envelop collector of 20um and polytetrafluoroethylhollow hollow fiber ultrafiltration membrance filter after filtration successively, remove suspended substance wherein and precipitate, then will after acetic acid containing waste water pressurization, use antipollution nanofiltration membrane through repeatedly concentrating the acetic acid reclaimed further in waste water, the concentration of the acetic acid in last concentrated solution of discharging is made to reach 40wt%, gained diluent enters pure water tank, concentrated solution is through rectification and purification, gained acetic acid recovery utilizes.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in invention.
Claims (3)
1. a treatment process for acetic acid containing waste water, is characterized in that, comprises the steps:
1) pre-treatment: by the acetate concentration that production process produces be the waste water control temperature of 10 ~ 15wt% below 40 DEG C, under the effect of raw water pump successively after cloth envelop collector and hollow fiber ultrafiltration membrane are filtered, removing suspended substance wherein and precipitate;
2) membrane sepn: by step 1) in gained acetic acid containing waste water pressurization after with the antipollution nanofiltration membrane concentrated acetic acid reclaimed further in waste water repeatedly, make the concentration of the acetic acid in last concentrated solution of discharging reach 40wt%;
3) aftertreatment: by step 2) in the concentrated solution of gained through rectification and purification, gained acetic acid recovery uses.
2. the treatment process of a kind of acetic acid containing waste water according to claim 1, is characterized in that, step 1) described in the filtering accuracy of cloth envelop collector be 20um.
3. the treatment process of a kind of acetic acid containing waste water according to claim 1, is characterized in that, step 1) described in hollow fiber ultrafiltration membrane be made up of tetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351480.0A CN104926010A (en) | 2015-06-23 | 2015-06-23 | Acetic acid wastewater treatment technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510351480.0A CN104926010A (en) | 2015-06-23 | 2015-06-23 | Acetic acid wastewater treatment technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104926010A true CN104926010A (en) | 2015-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510351480.0A Pending CN104926010A (en) | 2015-06-23 | 2015-06-23 | Acetic acid wastewater treatment technology |
Country Status (1)
| Country | Link |
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| CN (1) | CN104926010A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114057568A (en) * | 2020-07-29 | 2022-02-18 | 三达膜科技（厦门）有限公司 | Method for recovering dilute acetic acid water discharged by main device in purified terephthalic acid production |
-
2015
- 2015-06-23 CN CN201510351480.0A patent/CN104926010A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114057568A (en) * | 2020-07-29 | 2022-02-18 | 三达膜科技（厦门）有限公司 | Method for recovering dilute acetic acid water discharged by main device in purified terephthalic acid production |
| CN114057568B (en) * | 2020-07-29 | 2024-04-19 | 三达膜科技（厦门）有限公司 | Method for recycling dilute acetic acid water discharged from main device in production of refined terephthalic acid |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150923 |