CN101830532B - Acrylic acid wastewater preprocessing process - Google Patents
Acrylic acid wastewater preprocessing process Download PDFInfo
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- CN101830532B CN101830532B CN 201010178742 CN201010178742A CN101830532B CN 101830532 B CN101830532 B CN 101830532B CN 201010178742 CN201010178742 CN 201010178742 CN 201010178742 A CN201010178742 A CN 201010178742A CN 101830532 B CN101830532 B CN 101830532B
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- acrylic acid
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Abstract
The invention relates to an acrylic acid wastewater preprocessing process which adopts a steam stripping process and comprises the process flows that acrylic acid wastewater firstly enters a buffer tank, and then is transported to the upper part and the lower part of a steam stripping tower after being divided into two paths through a machine pump and a pipeline; the middle part of the stripping tower is connected with steam stripping gas; the acrylic acid wastewater is pumped out from the lower part of the steam stripping tower through a pump and circularly enters the upper part of the steamstripping tower for circular processing after being heated through a wastewater heater, and the acrylic acid wastewater after the circular processing is transported to a wastewater biochemical processing system through the pipeline; and when the amount of the acrylic acid wastewater is small, the wastewater is not transported out of the tower bottom any more, and all the wastewater entering the steam stripping tower enters a sequent acrylic acid tail gas catalytic oxidation processing system along with the steam stripping gas for purification processing. In the invention, the wastewater is preprocessed by adopting the steam stripping process, and compared with the prior art, the acrylic acid wastewater preprocessing process has the advantages of rapid wastewater processing, small energy consumption, short flow, low cost and high qualified rate of the discharged wastewater.
Description
One, technical field
The present invention relates to a kind of waste water treatment process, relate in particular to a kind of acrylic acid wastewater preprocessing process.
Two, background technology
At present, biochemical treatment process for wastewater is adopted in the acrylic acid waste water treatment more, be that difficult degradation long-chain or the loop chain organism of acrylic acid wastewater in the waste water of oxygen-starved area can be broken down into short chain or the straight chain organism that is easy to degrade, and so that active sludge improves its biological activity and settling property through the stimulation of anoxic.Thereafter waste water is entered aerobic zone by plug-flow, uses microporous aeration device to carry out oxygenic aeration, aerobic microbiological is carried out oxygen supply, to keep microbial metabolism.COD is oxidized to CO
2And H
2O, under the Nitrosomas effect with NH
3-N is oxidized to NO
2-N salt carries out denitrification through the return of waste water after nitrated to the anoxic section, utilizes the denitrifying bacteria in the mud, under anoxia condition, with NO
2-N is reduced to gaseous nitrogen and discharges.Waste water after aerobic treatment enters settling tank, considers denitrification functions, and partially mixed liquid is back to the anoxic section, and the water outlet after the precipitation enters intermediate pool.Then promoting and enter BAF, as three grades of biological treatments of waste water, mainly be nitrated with the removal ammonia nitrogen, and further advanced treatment is removed organism and suspended solids in the waste water.But because acrylic acid wastewater is composed as follows:
| Sequence number | Composition | Acrylic acid wastewater kg/h | Quality (%) |
| 1 | Formaldehyde | 77.32 | 12009mg/ |
| 2 | Acetic acid | 172.23 | 2.7234 |
| 3 | Toluene | 14.79 | 0.2341 |
| 4 | Vinylformic acid | 79.51 | 1.2588 |
| 5 | Water | 6050.35 | 95.7838 |
| 6 | Waste water adds up to | 6394.00 | 100 |
Pollutent wherein: formaldehyde, acetic acid, toluene, vinylformic acid are difficult to process with biochemical process, often repeatedly circulate or dilute just with clear water to reach emission request, process slow, energy consumption is high, long flow path, cost is high, the efflux wastewater qualification rate is low.
Three, summary of the invention
Purpose of the present invention is exactly the defective that exists for prior art, and a kind of acrylic acid wastewater preprocessing process is provided.
Its technical scheme is: adopt stripping process, its technical process is: acrylic acid wastewater at first enters surge tank, by pump and pipeline acrylic acid waste moisture two-way is transported to the stripping tower upper and lower again; The stripping tower middle part is connected with stripping gas as stripping power; Acrylic acid wastewater is extracted out from the stripping tower bottom by pump, and enters stripping tower top circular treatment by circulation after the waste water heater heating, and the acrylic acid wastewater after the circular treatment is transported to biochemical treatment system through piping; When the acrylic acid waste water yield is few, no longer send waste water at the bottom of the tower outside, the waste water that enters stripping tower all enters follow-up catalytic oxidation treatment system with stripping gas, carries out purifying treatment.
Wherein, described stripping gas is vinylformic acid tail gas.Described waste water heater adopts steam heater.Described stripping tower bottom temperature is controlled to be 50-60 ℃, and its head temperature is controlled to be 145-155 ℃.
The present invention adopts stripping process that waste water is carried out pre-treatment, makes it compared with prior art, has the advantage that wastewater treatment is fast, energy consumption is little, flow process is short, cost is low, the efflux wastewater qualification rate is high.
Four, description of drawings
Accompanying drawing is acrylic acid wastewater preprocessing process schema of the present invention.
Five, embodiment
With reference to accompanying drawing, acrylic acid wastewater preprocessing process adopts stripping process, its technical process is: acrylic acid wastewater at first enters surge tank 1 by pipeline, acrylic acid wastewater entered surge tank 1 before the admission stripper, guaranteed that sewage quantity is stable, and then by pump 2 and pipeline acrylic acid waste moisture two-way has been transported to stripping tower 3 upper and lowers; Stripping tower 3 middle parts are connected with stripping gas, as stripping power; Acrylic acid wastewater in the stripping tower 3 is extracted out from stripping tower 3 bottoms by pump 4, and enters stripping tower 3 top circular treatment by circulation after waste water heater 5 heating, and the acrylic acid wastewater after the circular treatment is transported to biochemical treatment system through piping; When the acrylic acid waste water yield is few, no longer to send outside at the bottom of the tower, the acrylic acid wastewater that enters stripping tower 3 all enters follow-up catalytic oxidation treatment system with stripping gas, carries out purifying treatment.
Among the present invention, stripping gas adopts vinylformic acid tail gas; Waste water heater adopts steam heater.Stripping tower bottom temperature is controlled to be 50-60 ℃, and its head temperature is controlled to be 145-155 ℃.
Claims (4)
1. acrylic acid wastewater preprocessing process, it is characterized in that: adopt stripping process, the technical process of described pretreatment technology is: acrylic acid wastewater at first enters surge tank, by pump and pipeline acrylic acid waste moisture two-way is transported to the stripping tower upper and lower again; The stripping tower middle part is connected with stripping gas as stripping power; Acrylic acid wastewater is extracted out from the stripping tower bottom by pump, and enters stripping tower top circular treatment by circulation after the waste water heater heating, and the acrylic acid wastewater after the circular treatment is transported to biochemical treatment system through piping; When the acrylic acid waste water yield is few, no longer send waste water at the bottom of the tower outside, the waste water that enters stripping tower all enters follow-up catalytic oxidation treatment system with stripping gas, carries out purifying treatment.
2. acrylic acid wastewater preprocessing process according to claim 1, it is characterized in that: described stripping gas is vinylformic acid tail gas.
3. acrylic acid wastewater preprocessing process according to claim 1 is characterized in that: described waste water heater employing steam heater.
4. acrylic acid wastewater preprocessing process according to claim 1 is characterized in that: described stripping tower bottom temperature is controlled to be 50-60 ℃, and its head temperature is controlled to be 145-155 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010178742 CN101830532B (en) | 2010-05-12 | 2010-05-12 | Acrylic acid wastewater preprocessing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010178742 CN101830532B (en) | 2010-05-12 | 2010-05-12 | Acrylic acid wastewater preprocessing process |
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| Publication Number | Publication Date |
|---|---|
| CN101830532A CN101830532A (en) | 2010-09-15 |
| CN101830532B true CN101830532B (en) | 2013-04-03 |
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|---|---|---|---|
| CN 201010178742 Active CN101830532B (en) | 2010-05-12 | 2010-05-12 | Acrylic acid wastewater preprocessing process |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106966483B (en) * | 2017-03-29 | 2019-05-28 | 濮阳市盛源能源科技股份有限公司 | A kind of maleic anhydride wastewater treatment method |
| CN109529610A (en) * | 2018-12-24 | 2019-03-29 | 杭州谱育科技发展有限公司 | The processing unit and method of tail gas in acrylic acid production |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245782A (en) * | 1999-08-06 | 2000-03-01 | 天津大学 | Gas stripping and photocatalytic oxidation sewage treatment equipment |
| CN1490253A (en) * | 2002-10-16 | 2004-04-21 | 中国石油化工股份有限公司 | Waste water treating method for methyl ethyl ketone production |
| JP2005040667A (en) * | 2003-07-24 | 2005-02-17 | Fuji Electric Systems Co Ltd | Cleaning treatment method for methane fermentation digestive supernatant liquor |
| CN200996011Y (en) * | 2006-12-30 | 2007-12-26 | 中国石油大学(北京) | External circulating-current reactor of double-nozzle air-extracting |
| JP4118095B2 (en) * | 2002-06-27 | 2008-07-16 | トヨタ自動車株式会社 | Annular sintered part and method for manufacturing the same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2624572B2 (en) * | 1989-12-02 | 1997-06-25 | 株式会社日本触媒 | Acrylic acid production plant wastewater treatment method |
| JP3698748B2 (en) * | 1995-01-27 | 2005-09-21 | 株式会社日本触媒 | Ammonia-containing wastewater treatment method |
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2010
- 2010-05-12 CN CN 201010178742 patent/CN101830532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1245782A (en) * | 1999-08-06 | 2000-03-01 | 天津大学 | Gas stripping and photocatalytic oxidation sewage treatment equipment |
| JP4118095B2 (en) * | 2002-06-27 | 2008-07-16 | トヨタ自動車株式会社 | Annular sintered part and method for manufacturing the same |
| CN1490253A (en) * | 2002-10-16 | 2004-04-21 | 中国石油化工股份有限公司 | Waste water treating method for methyl ethyl ketone production |
| JP2005040667A (en) * | 2003-07-24 | 2005-02-17 | Fuji Electric Systems Co Ltd | Cleaning treatment method for methane fermentation digestive supernatant liquor |
| CN200996011Y (en) * | 2006-12-30 | 2007-12-26 | 中国石油大学(北京) | External circulating-current reactor of double-nozzle air-extracting |
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| CN101830532A (en) | 2010-09-15 |
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