CN103588336B - Method for utilizing low-concentration acetic acid wastewater - Google Patents
Method for utilizing low-concentration acetic acid wastewater Download PDFInfo
- Publication number
- CN103588336B CN103588336B CN201310498806.3A CN201310498806A CN103588336B CN 103588336 B CN103588336 B CN 103588336B CN 201310498806 A CN201310498806 A CN 201310498806A CN 103588336 B CN103588336 B CN 103588336B
- Authority
- CN
- China
- Prior art keywords
- acetic acid
- water
- cooling tower
- concentration
- water cooling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a method for utilizing low-concentration acetic acid wastewater, which comprises the following steps: (1) filtration treatment: filtering acetic acid wastewater for impurity removal; (2) neutralizing treatment: adding potassium hydroxide into the filtered acetic acid wastewater to initiate neutralization reaction, and stirring with a stirrer to thoroughly mixing the acetic acid wastewater and potassium hydroxide so that the acetic acid and potassium hydroxide react to generate potassium acetate, thereby regulating the pH value of the acetic acid wastewater to 7-9; (3) concentration treatment: introducing the neutralized acetic acid wastewater into a water cooling tower to replenish water to the water cooling tower, wherein the concentration of potassium acetate in the cooling water in the water cooling tower increases as the water cooling tower system operates; and (4) crystallization by evaporation: when the concentration of potassium acetate in the cooling water in the water cooling tower reaches 20-2700 g/L, evaporating the cooling water to crystallize to obtain the potassium acetate. The method can treat acetic acid in the acetic acid wastewater so as to recycle the potassium acetate, and has the advantages of strong practicality and high operational safety and stability.
Description
Technical field
The present invention relates to technical field of waste water processing, refer to a kind of method utilizing low-concentration acetic acid wastewater particularly.
Background technology
Along with various countries are to the pay attention to day by day of environmental protection, in view of the harm that trade effluent causes environment, employee and his person, all make the emission standard of trade effluent both at home and abroad and increasingly strict.It is reported, low-concentration acetic acid wastewaters still then a large amount of every year directly discharges, a large amount of resource of not only losing, and pollutes environment.Therefore, the acetic acid containing waste water of lower concentration is recycled, not only have good economic benefit, and be that environment protection institute is required.
At present, the treatment process of Dichlorodiphenyl Acetate waste water has: neutralisation, absorption method, synthetic vinegar hydrochlorate method, esterification process, membrane separation process, rectification method, biochemical process, integrated process etc., but the process of the acetic acid containing waste water to lower concentration, scarcely it is recycled, after preliminary treatment, finally adopt Wastewater by Biochemical Treatment rear discharge up to standard.Known for above-mentioned disclosed Technical Analysis, there is the shortcomings such as equipment investment cost is high, operational requirement is strict, floor space is large in existing technological method.
Summary of the invention
The object of the invention is to the weak point overcoming above-mentioned existing background technology, and a kind of method utilizing low-concentration acetic acid wastewater is provided.
Technical scheme of the present invention: it comprises the following steps:
(1) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(2) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate PH to 7 ~ 9 of acetic acid containing waste water;
(3) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(4) evaporative crystallization: after Potassium ethanoate reaches 20g/L ~ 2700g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
The good technical scheme of the present invention: it comprises the following steps:
(2) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(3) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate the PH to 8 of acetic acid containing waste water;
(5) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(6) evaporative crystallization: after Potassium ethanoate reaches 50g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
Acetic acid process in acetic acid containing waste water can be obtained Potassium ethanoate and recycle by the present invention, and the method is practical, and operational safety is stablized, and treatment effect is good, can obtain certain economic benefit.All processes, without the discharge of waste water, reduces the rate of water make-up of water cooling tower, and obtains Potassium ethanoate finished product.Its technological process treatment effect is high, with low cost, supporting with production equipment, has a good application prospect.
Embodiment:
Below in conjunction with specific embodiment, the present invention is described in further detail.
In embodiment, low-concentration acetic acid wastewater water quality parameter is as shown in table 1.
Embodiment 1: it comprises the following steps:
(1) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(2) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate the PH to 8 of acetic acid containing waste water;
(3) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(4) evaporative crystallization: after Potassium ethanoate reaches 50g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
Embodiment 2: it comprises the following steps:
(1) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(2) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate the PH to 7 of acetic acid containing waste water;
(3) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(4) evaporative crystallization: after Potassium ethanoate reaches 2700g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
Embodiment 3: it comprises the following steps:
(1) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(2) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate the PH to 9 of acetic acid containing waste water;
(3) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(4) evaporative crystallization: after Potassium ethanoate reaches 20g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
Claims (1)
1. utilize a method for low-concentration acetic acid wastewater, comprise the following steps:
(1) filtration treatment: first acetic acid containing waste water is carried out filtering, removal of impurities;
(2) neutralizing treatment: add potassium hydroxide generation neutralization reaction in the acetic acid containing waste water after filtration, utilize stirrer to stir and acetic acid containing waste water is fully mixed with potassium hydroxide, acetic acid and potassium hydroxide react and generate Potassium ethanoate, regulate the pH to 8 of acetic acid containing waste water;
(3) concentration: gained acetic acid containing waste water after neutralization is led to water cooling tower moisturizing is carried out to water cooling tower, along with the operation of water cooling tower system, in the water coolant of water cooling tower, the concentration of Potassium ethanoate raises;
(4) evaporative crystallization: after Potassium ethanoate reaches 50g/L in the water coolant of water cooling tower, carries out evaporative crystallization by gained water coolant and obtains Potassium ethanoate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498806.3A CN103588336B (en) | 2013-10-22 | 2013-10-22 | Method for utilizing low-concentration acetic acid wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310498806.3A CN103588336B (en) | 2013-10-22 | 2013-10-22 | Method for utilizing low-concentration acetic acid wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103588336A CN103588336A (en) | 2014-02-19 |
| CN103588336B true CN103588336B (en) | 2015-05-06 |
Family
ID=50078702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310498806.3A Active CN103588336B (en) | 2013-10-22 | 2013-10-22 | Method for utilizing low-concentration acetic acid wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103588336B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105585199B (en) * | 2016-03-14 | 2018-04-13 | 尚鼎环境科技（江苏）有限公司 | A kind of Zero-discharge treating process of dyeing waste water |
| CN115193097A (en) * | 2022-07-19 | 2022-10-18 | 厦门大学 | Extraction separation method for removing trace acetic acid and water in mixed organic solvent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372619A (en) * | 2010-08-23 | 2012-03-14 | 刘同清 | Process for producing acetate by using dilute acetic acid |
-
2013
- 2013-10-22 CN CN201310498806.3A patent/CN103588336B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102372619A (en) * | 2010-08-23 | 2012-03-14 | 刘同清 | Process for producing acetate by using dilute acetic acid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103588336A (en) | 2014-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104496819B (en) | A kind of method that environment-friendly plasticizer is prepared in waste resource recycling | |
| CN105480988A (en) | Method for preparing high-purity ammonium salts from high-impurity ammonium salt waste liquor | |
| CN103588336B (en) | Method for utilizing low-concentration acetic acid wastewater | |
| CN102730721A (en) | Recovering method of by-product sodium chloride in polyphenylene sulfide production | |
| CN104291532A (en) | Treatment method and equipment of beta-naphthol production wastewater | |
| CN106082530A (en) | A kind of integrated treatment photovoltaic energy enterprise productive life method of wastewater treatment | |
| CN103896457B (en) | A kind of Fine Chemistry Wastewater treatment process | |
| CN105565566A (en) | Method for performing Fenton treatment on 6-nitro-1-diazo-2-naphthol-4-sulfonic acid wastewater and coproducing sodium sulfate | |
| CN103086558A (en) | Treatment method of copper chloride hydroxide production wastewater | |
| CN103991999A (en) | Method for pre-treating epoxy resin wastewater before evaporation | |
| CN102924268A (en) | Method for preparing gallic acid | |
| CN105417888A (en) | Clindamycin hydrochloride waste water processing technology | |
| CN102531299B (en) | Method for treating addition wastewater in production process of lipoic acid | |
| CN109607915A (en) | A kind of processing method of Benzotriazole Ultraviolet Stabilizer production waste water | |
| CN204111543U (en) | A kind of 2-Naphthol production wastewater treatment equipment | |
| CN110171902B (en) | Comprehensive treatment method of metronidazole wastewater | |
| CN104072424A (en) | Environmental novel co-production technology of metronidazole and composite fertilizer | |
| CN104211270B (en) | The processing method of cyclization waste water in production process of lipoic acid | |
| CN103911510A (en) | Method for purifying and removing iron, aluminum and silicon in superimposition manner | |
| CN103011450A (en) | Treatment method for chlor-alkali industry wastewater | |
| CN109836324A (en) | A kind of recovery process of phenylacetic acid | |
| CN103214053B (en) | Method for treating wastewater from gallic acid production | |
| CN104261629B (en) | The combination treatment method of addition waste water and cyclization waste water in production process of lipoic acid | |
| CN208575082U (en) | A kind of processing unit of the slag of salt containing organic matter | |
| CN105540923A (en) | Method for removing 2-mercaptopyridine-N-oxide in wastewater and recycling of 2-mercaptopyridine-N-oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |