CN102060407A - System and method for treating butyl acetate waste water - Google Patents
System and method for treating butyl acetate waste water Download PDFInfo
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- CN102060407A CN102060407A CN 201010572863 CN201010572863A CN102060407A CN 102060407 A CN102060407 A CN 102060407A CN 201010572863 CN201010572863 CN 201010572863 CN 201010572863 A CN201010572863 A CN 201010572863A CN 102060407 A CN102060407 A CN 102060407A
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- butyl acetate
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Abstract
The invention discloses a system and method for treating butyl acetate waste water. The system comprises an extraction tower, a rectifying tower and a flash evaporator, wherein the rectifying tower and the flash evaporator are connected with the extraction tower; and the method comprises the steps of: delivering butyl acetate waste water into the extraction tower, extracting a mixed solution of butyl acetate and butyl ether on the top of the extraction tower by using the butyl ether as an extracting agent, delivering the mixed solution into the rectifying tower, extracting an aqueous solution containing trace butyl ether at the lower part of the extraction tower, and delivering the aqueous solution into the flash evaporator for flash evaporation; extracting the butyl acetate and the butyl ether for recycling respectively from the top and the bottom of the rectifying tower; and extracting the azetrope of the butyl ether and water from the upper gaseous phase of the flash evaporator, for recycling, and simultaneously discharging waste water reaching a discharge standard from the lower liquid phase of the flash evaporator. The system and the method disclosed by the invention have the advantages of simple equipment, simple process, high treating capacity, high recovery rate of the butyl acetate and low steam consumption; an extraction operation mode is adopted; the treated waste water reaches the discharge standard in China; and the extracting agent can be recycled so that the cost of the whole treating process is lowered.
Description
Technical field
The present invention relates to a kind of processing method of industrial waste water, more particularly, the present invention relates to a kind of treatment system and method for N-BUTYL ACETATE waste water.
Background technology
N-BUTYL ACETATE is a kind of common chemical raw materials, also is a kind of excellent solvent simultaneously, can be applicable to industry such as rubber, leather, coating, medicine manufacturing, also can be used as extraction agent, dewatering agent or thinner etc.In addition,, also can be applicable to foodstuffs industry, as the deodorant tune of drinks etc. because the toxicity of N-BUTYL ACETATE is very low.As seen, the application of N-BUTYL ACETATE is very extensive.
One of characteristic of N-BUTYL ACETATE is to be slightly soluble in water, and the existence of some component in its solubleness or the solution, can obviously strengthen along with the rising of temperature.Therefore, in the waste water that above-mentioned production field produces, will contain a certain amount of N-BUTYL ACETATE, and the factory effluent that contains N-BUTYL ACETATE also can cause environmental pollution.If can reclaim N-BUTYL ACETATE from these factory effluents, not only can reduce because the environmental pollution that discharging caused of N-BUTYL ACETATE can also make the N-BUTYL ACETATE of recovery be recycled, reduce a part of production cost.
At present, the common method of processing N-BUTYL ACETATE waste water is exactly common and traditional rectification process.This technology utilization N-BUTYL ACETATE characteristics different and azeotropic effect between the two with water boiling point, make the N-BUTYL ACETATE waste water that needs to handle at the cat head formation N-BUTYL ACETATE of the rectifying tower of certain specification and the azeotrope of water, and utilize N-BUTYL ACETATE solubleness features of limited in water, make it after the overhead gas condensation, be divided into two-phase, rich N-BUTYL ACETATE wherein feeds rectifying tower mutually and carries out rectifying, water-rich phase wherein mixes with wastewater feed, thereby reaches the purpose of separating acetic acid butyl ester and water.
In aforesaid rectifying tower, the tower still is the place of preliminary treatment waste water, and the secondary wastewater treatment is passed through in the discharging of described tower still again, thereby realizes the N-BUTYL ACETATE wastewater to reach standard of discharging.But, use the method for traditional processing N-BUTYL ACETATE waste water, the rate of recovery of N-BUTYL ACETATE is not high, and the consumption of steam is also bigger.
Summary of the invention
Problem to be solved by this invention overcomes the shortcoming of above prior art exactly, and a kind of system and method for new processing N-BUTYL ACETATE waste water is provided.
The present invention handles the system of N-BUTYL ACETATE waste water, comprises extraction tower, and the top delivery port of described extraction tower connects rectifying tower by transmission pipeline, and the bottom delivery port of described extraction tower connects flasher by transmission pipeline.
Described extraction tower is packing tower or tray column;
Described rectifying tower is packing tower or tray column.
Utilize the method for above system handles N-BUTYL ACETATE waste water, comprise the steps:
(1) N-BUTYL ACETATE waste water is sent into extraction tower, and make extraction agent with butyl ether;
(2) send into described rectifying tower rectifying at the cat head extraction N-BUTYL ACETATE of described extraction tower and the mixing solutions of butyl ether, and the aqueous solution of extraction butyl ether is sent into described flasher flash distillation at the bottom of the tower of described extraction tower 1;
(3) the cat head extraction N-BUTYL ACETATE reuse by described rectifying tower, and in the reuse of the bottom of the described rectifying tower extraction butyl ether aqueous solution;
(4), reach the waste water of emission standard simultaneously in the discharging of the bottom of described flasher liquid phase in the azeotrope reuse of the upper gaseous phase extraction butyl ether and the water of described flasher.
The invention has the beneficial effects as follows: adopt the extracting operation mode, equipment is simple, and process is simple, treatment capacity is big, the rate of recovery height of N-BUTYL ACETATE, and the consumption of steam is little, the waste water of handling reaches discharging standards, and extraction agent can recycle, and has reduced the cost of entire treatment flow process.
Description of drawings
Accompanying drawing is a schematic flow sheet of the present invention.
Embodiment
In order to make technical scheme of the present invention be more convenient for understanding, be elaborated below in conjunction with drawings and Examples.
With reference to accompanying drawing, the present invention handles the system of N-BUTYL ACETATE waste water, comprise extraction tower 1, rectifying tower 2 and flasher 3, the top delivery port of described extraction tower 1 connects described rectifying tower 2 by transmission pipeline, the bottom delivery port of described extraction tower 1 connects described flasher 3 by transmission pipeline, and the top delivery port of described rectifying tower 2 and bottom delivery port be the setting pressure table respectively.
Extraction tower 1 wherein and rectifying tower 2 all can be packing tower or tray column, and perhaps, extraction tower 1 wherein and rectifying tower 2 can be respectively packing tower or tray column.
Adopt the method for the system handles N-BUTYL ACETATE waste water of above-mentioned processing N-BUTYL ACETATE waste water, comprise the steps:
(1) will need the N-BUTYL ACETATE waste water handled, and send into extraction tower 1 by transmission pipeline, and make extraction agent with butyl ether, and adopt the counter-current extraction mode, making organism is light phase, and water is heavy phase;
(2) at the N-BUTYL ACETATE of the light phase of cat head extraction of described extraction tower 1 and the mixing solutions of butyl ether, and send into rectifying tower 2 rectifying by transmission pipeline, the aqueous solution of extraction butyl ether at the bottom of the tower of described extraction tower 1 simultaneously, and send into described flasher 3 flash distillations by pipeline;
(3) the cat head extraction N-BUTYL ACETATE by described rectifying tower 2, as reclaiming product, and the butyl ether that is used to recycle in the extraction of the bottom of described rectifying tower 2;
(4) in the azeotrope reuse of the upper gaseous phase extraction butyl ether and the water of described flasher 3, simultaneously in the discharging of the bottom of described flasher liquid phase through handling the waste water that reaches emission standard.
The handled material of the present invention is the N-BUTYL ACETATE waste water that produces in the N-BUTYL ACETATE production process and does the N-BUTYL ACETATE waste water that produces in the dissolving agent process with N-BUTYL ACETATE.The rectificating method that is adopted, not only can separating acetic acid butyl ester and butyl ether extraction agent, and can reclaim in the N-BUTYL ACETATE waste water N-BUTYL ACETATE and as the butyl ether of extraction agent, thereby saved the processing cost of waste water, improved the rate of recovery of N-BUTYL ACETATE and butyl ether, simultaneously, make treated N-BUTYL ACETATE waste water meet national specified discharge standard.
Below in conjunction with the accompanying drawings and embodiments technical scheme of the present invention is schematically described.Those skilled in the art will be understood that in actual applications the set-up mode of each parts all may some change take place according to production requirement and on-the-spot installation situation in the flow process of the present invention; And under enlightenment of the present invention, other staff also may make the design similar to the present invention.Special needs to be pointed out is that only otherwise break away from design aim of the present invention, all conspicuous change and similar Design thereof all should belong to protection scope of the present invention.
Claims (4)
1. a system that handles N-BUTYL ACETATE waste water comprises extraction tower, it is characterized in that, the top delivery port of described extraction tower connects rectifying tower by transmission pipeline, and the bottom delivery port of described extraction tower connects flasher by transmission pipeline.
2. the system of processing N-BUTYL ACETATE waste water according to claim 1 is characterized in that, described extraction tower is packing tower or tray column.
3. the system of processing N-BUTYL ACETATE waste water according to claim 1 is characterized in that, described rectifying tower is packing tower or tray column.
4. a method of utilizing the described system handles N-BUTYL ACETATE of claim 1 waste water comprises the steps:
(1) N-BUTYL ACETATE waste water is sent into extraction tower, and make extraction agent with butyl ether;
(2) send into described rectifying tower rectifying at the cat head extraction N-BUTYL ACETATE of described extraction tower and the mixing solutions of butyl ether, and the aqueous solution of extraction butyl ether is sent into described flasher flash distillation at the bottom of the tower of described extraction tower 1;
(3) the cat head extraction N-BUTYL ACETATE by described rectifying tower, as reclaiming product, and the butyl ether that is used to recycle in the extraction of the bottom of described rectifying tower;
(4), reach the waste water of emission standard simultaneously in the discharging of the bottom of described flasher liquid phase in the azeotrope reuse of the upper gaseous phase extraction butyl ether and the water of described flasher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010572863 CN102060407A (en) | 2010-12-05 | 2010-12-05 | System and method for treating butyl acetate waste water |
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| CN 201010572863 CN102060407A (en) | 2010-12-05 | 2010-12-05 | System and method for treating butyl acetate waste water |
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| CN 201010572863 Pending CN102060407A (en) | 2010-12-05 | 2010-12-05 | System and method for treating butyl acetate waste water |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056893A (en) * | 1991-07-04 | 1991-12-11 | 东北煤气化设计研究所 | Gas sewage extracting and dephenolizing, ammonia still process treatment process |
| WO2001002074A1 (en) * | 1999-07-06 | 2001-01-11 | Arco Chemical Technology, L.P. | Extractive distillation separation |
| WO2001007390A1 (en) * | 1999-07-22 | 2001-02-01 | Consortium für elektrochemische Industrie GmbH | A method for the separation and purification of an aqueous mixture consisting of acetic acid and formic acid as the main components |
| CN1594116A (en) * | 2003-09-08 | 2005-03-16 | 中国科学院过程工程研究所 | Process for separating and recovering minim organic solvent from waste water using ion liquid |
| CN101066785A (en) * | 2007-06-01 | 2007-11-07 | 浙江工商大学 | Process of separating and recovering extractant from waste erythromycin producing water |
| CN101172941A (en) * | 2006-11-02 | 2008-05-07 | 中国石油化工股份有限公司 | Method for recycling acetic acid in dilute acetic acid |
| CN101811965A (en) * | 2010-05-07 | 2010-08-25 | 南京大学 | Process for separating and recovering butyl acetate and butyl alcohol in wastewater by using azeotropic rectification |
-
2010
- 2010-12-05 CN CN 201010572863 patent/CN102060407A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056893A (en) * | 1991-07-04 | 1991-12-11 | 东北煤气化设计研究所 | Gas sewage extracting and dephenolizing, ammonia still process treatment process |
| WO2001002074A1 (en) * | 1999-07-06 | 2001-01-11 | Arco Chemical Technology, L.P. | Extractive distillation separation |
| WO2001007390A1 (en) * | 1999-07-22 | 2001-02-01 | Consortium für elektrochemische Industrie GmbH | A method for the separation and purification of an aqueous mixture consisting of acetic acid and formic acid as the main components |
| CN1594116A (en) * | 2003-09-08 | 2005-03-16 | 中国科学院过程工程研究所 | Process for separating and recovering minim organic solvent from waste water using ion liquid |
| CN101172941A (en) * | 2006-11-02 | 2008-05-07 | 中国石油化工股份有限公司 | Method for recycling acetic acid in dilute acetic acid |
| CN101066785A (en) * | 2007-06-01 | 2007-11-07 | 浙江工商大学 | Process of separating and recovering extractant from waste erythromycin producing water |
| CN101811965A (en) * | 2010-05-07 | 2010-08-25 | 南京大学 | Process for separating and recovering butyl acetate and butyl alcohol in wastewater by using azeotropic rectification |
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Application publication date: 20110518 |