CN109925864A - A kind of dehydroacetic acid exhaust gas treating method and device - Google Patents
A kind of dehydroacetic acid exhaust gas treating method and device Download PDFInfo
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- CN109925864A CN109925864A CN201910235095.8A CN201910235095A CN109925864A CN 109925864 A CN109925864 A CN 109925864A CN 201910235095 A CN201910235095 A CN 201910235095A CN 109925864 A CN109925864 A CN 109925864A
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- exhaust gas
- dehydroacetic acid
- lye
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- fiber bag
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Abstract
The invention discloses a kind of dehydroacetic acid exhaust gas treating method, by dehydroacetic acid prepare in the tail gas that generates discharged after being come into full contact with buck film after fiber bag precipitator.Also disclose a kind of dehydroacetic acid exhaust gas processing device using this method, including fiber bag precipitator and water dust scrubber, the front end receiver tail gas of the fiber bag precipitator, the rear end of the fiber bag precipitator and the inlet end of water dust scrubber connect, and are provided with lye in the water dust scrubber.The present invention has the advantages that absorbing dust by the way that dehydroacetic acid or sodium dehydroacetate tail gas produced during the preparation process are first passed through fiber bag precipitator, absorption dedusting is carried out using using the water dust scrubber of lye moisture film, the dehydroacetic acid that fiber bag precipitator can effectively be absorbed can not adsorb makes it be reacted to salt with alkali, convenient for processing, exhaust emissions is reduced, and can effectively improve the yield of sodium dehydroacetate.
Description
Technical field
The present invention relates to dehydroacetic acid preparation, in particular to a kind of dehydroacetic acid exhaust gas treating method and device.
Background technique
Dehydroacetic acid, also known as dehydroactic acid, be mainly used for low toxicity, efficiently, broad spectrum antimicrobial agent, be widely used in coating,
Oil plant, leather and fur products, food, feed, packaging material and cosmetics fungus-proof antisepsis.Dehydroacetic acid preparation is usual in the prior art
It is made or by ethyl acetoacetate using by dimerization reaction occurs in ketene dimer atent solvent in the presence of a catalyst in carbon
Sour hydrogen sodium effect is lower to be made.Two methods can all generate dehydroacetic acid and impurity and unreacted with volatilization after preparation
The tail gas of raw material, the prior art generally use the mode of double heap vacuum driers or flash evaporation drying by fiber bag precipitator into
Row dedusting.Above two mode handle after tail gas all can the volatilization acetic acid containing higher concentration, on the one hand pollute environment make
It is not up to standard at discharging, it on the other hand will also result in equipment corrosion for a long time, and can generate finally by fiber bag precipitator dedusting
More dust.
Summary of the invention
The volatilization in dehydroacetic acid can be effectively reduced the technical problem to be solved in the present invention is to provide one kind, reduction is arranged
The dehydroacetic acid exhaust gas treating method and device put.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is as follows: a kind of dehydroacetic acid exhaust gas treating method, wound
New point is: by dehydroacetic acid prepare in the tail gas that generates after fiber bag precipitator by coming into full contact with heel row with buck film
It puts.
Further, the solution of buck film is formed after iterative cycles absorption reaches saturation, extremely by salt acid for adjusting pH
Sodium dehydroacetate is precipitated completely in 3-4.
Preferably, the solution for generating buck film is the sodium hydroxide solution of 2%-5%.
It is a further object to provide a kind of device using foregoing dehydroacetic acid exhaust gas treating method,
Including fiber bag precipitator and water dust scrubber, the front end receiver tail gas of the fiber bag precipitator, the fiber bag precipitator
Rear end and the inlet end of water dust scrubber connect, be provided with lye in the water dust scrubber.
Further, the water dust scrubber includes lye pond, admission line, pond is precipitated, sprays head, filled layer, moisture film
Cylinder, blower and blowdown stack, the lye pond are arranged in the lower section of moisture film cylinder and are firmly connected with it, the precipitation pond and lye
Pond connection, the head and filled layer setting of spraying is inside moisture film cylinder, the top for spraying head and filled layer being arranged in, the leaching
Spray head is arranged along the inner wall of moisture film cylinder, and the rear end of the admission line and fiber bag precipitator connects, the admission line
The other end is connected to the inside of moisture film cylinder, and the top of the exhaust gas channel is connected to the top of moisture film cylinder, under the exhaust gas channel
End is connected to blowdown stack, and the lye pond is connected to by water pump with head is sprayed.
Further, the side of blowdown stack, the air duct of the blower and the lower section of blowdown stack is arranged in the blower
Connection.
Further, pH meter is provided in the lye pond, the side in the lye pond is provided with lye adding mouth, described
Pond side is precipitated and is provided with hydrochloric acid adding mouth.
Further, the fiber bag precipitator includes cabinet, air inlet and outlet, pocket and ash bucket, the air inlet
For receiving tail gas, the air outlet is connected to water dust scrubber, and the pocket is arranged in cabinet, the pocket rear and front end
It is connected to respectively with air inlet and air outlet, the lower section of pocket is arranged in the ash bucket, and the ash bucket and pocket are solid with cabinet respectively
Fixed connection.
Further, the sodium hydroxide solution of 2%-5% is provided in the lye pond.
By adopting the above technical scheme, due to by by dehydroacetic acid or sodium dehydroacetate tail gas produced during the preparation process
It first passes through fiber bag precipitator and absorbs dust, carry out absorption dedusting, Neng Gouyou using using the water dust scrubber of lye moisture film
The dehydroacetic acid that the absorption fiber bag precipitator of effect can not adsorb makes it be reacted to salt with alkali, convenient for processing, reduces tail gas row
It puts, and can effectively improve the yield of sodium dehydroacetate.
Detailed description of the invention
Fig. 1 is the overall structure diagram of dehydroacetic acid exhaust gas processing device in the present invention.
Specific embodiment
Specific embodiments of the present invention will be further explained with reference to the accompanying drawing.It should be noted that for
The explanation of these embodiments is used to help understand the present invention, but and does not constitute a limitation of the invention.In addition, disclosed below
The each embodiment of the present invention involved in technical characteristic can be combined with each other as long as they do not conflict with each other.
Referring to Fig. 1, present embodiment discloses a kind of dehydroacetic acid exhaust gas processing device, and in particular to dehydroacetic acid
Exhaust gas processing device in sodium preparation process or in dehydroacetic acid preparation process comprising fiber bag precipitator 1 and water film dedusting
The rear end of device 2, the front end receiver tail gas of fiber bag precipitator 1, fiber bag precipitator 1 is connect with the inlet end of water dust scrubber 2,
Lye is provided in water dust scrubber 2.It is feasible, in this embodiment, moisture film is used to form in water dust scrubber 2
Lye is the sodium hydroxide solution of 2%-5%.
It is feasible, water dust scrubber 2 include lye pond 21, admission line 22, be precipitated pond 23, spray first 24, filled layer 25,
Moisture film cylinder 26, blower 28 and blowdown stack 29, lye pond 21 are arranged in the lower section of moisture film cylinder 26 and pass through bolt or welding with it
Mode is fixedly connected, and can also be disposed on ground.
Pond 23 is precipitated to connect with lye pond 21, switch valve is provided in connecting tube, it can be using the electromagnetism of controller control
Valve is then put by switch valve after dehydroacetic acid reaches saturation to precipitation pond 23 when the sodium hydroxide solution in lye pond 21 absorbs,
Adding salt acid for adjusting pH by the hydrochloric acid adding mouth 231 being arranged on precipitation pond 23 analyses the sodium dehydroacetate in solution to 3-4
Out, to improve the yield of sodium dehydroacetate.Can with, the pH of solution can be measured by pH meter, can also be by taking
The mode of sample measurement measures.It can certainly be carried out automatically controlling by controller.
Spray first 24 and filled layer 25 be arranged inside moisture film cylinder 26, spray first 24 tops that filled layer 25 is set, drench
Spray head 24 and filled layer 25 can be arranged to multilayered structure according to demand, feasible, and filler is provided in filled layer, and tail gas passes through
Lower section enters, and chamfers from the bottom up at whirlwind.First 24 are sprayed to be arranged along the inner wall of moisture film cylinder 26, during spray moisture film along
Inner wall forms moisture film.
Feasible, admission line 22 is connect with the rear end air outlet 13 of fiber bag precipitator 1, the other end of admission line 22
It is connected to the inside of moisture film cylinder 26, the top of exhaust gas channel 27 is connected to the top of moisture film cylinder 26, the lower end of exhaust gas channel 27 and row
The connection of chimney 29 is put, lye pond 21 is connected to by water pump with spraying first 24, and lye is pumped to leaching by water pump in operational process
It is sprayed at spray head 24.
Feasible, the side of blowdown stack 29 is arranged in blower 28, and the air duct of blower 28 and the lower section of blowdown stack 29 connect
It is logical, tail gas is discharged by blower air draft.
It is feasible, pH meter 212 is provided in lye pond 21, the side in lye pond 21 is provided with lye adding mouth 211, is precipitated
23 side of pond is provided with hydrochloric acid adding mouth 231, by setting pH meter 212 convenient for forming automation control, convenient for judging that solution is
It is no to reach saturation.
Feasible, fiber bag precipitator 1 includes cabinet 11, air inlet 12, air outlet 13, pocket 14 and ash bucket 15, air inlet
For receiving tail gas, air outlet 13 is connected to mouth 12 with water dust scrubber 2, and pocket 14 is arranged in cabinet 11,14 front and back two of pocket
End is connected to air inlet 12 and air outlet 13 respectively, and ash bucket 15 is arranged in the lower section of pocket 14, ash bucket 15 and pocket 14 respectively with
Cabinet 11 is fixedly connected in such a way that welding or bolt are fixed.
Due to by the way that dehydroacetic acid or sodium dehydroacetate tail gas produced during the preparation process are first passed through cloth-sack-type dust removal
Device 1 absorbs dust, carries out absorption dedusting using using the water dust scrubber 2 of lye moisture film, can effectively absorb cloth-bag type
The dehydroacetic acid that deduster can not adsorb makes it be reacted to salt with alkali, convenient for processing, reduces exhaust emissions, and can be effective
Raising sodium dehydroacetate yield.
In conjunction with attached drawing, the embodiments of the present invention are described in detail above, but the present invention is not limited to described implementations
Mode.For a person skilled in the art, in the case where not departing from the principle of the invention and spirit, to these embodiments
A variety of change, modification, replacement and modification are carried out, are still fallen in protection scope of the present invention.
Claims (10)
1. a kind of dehydroacetic acid exhaust gas treating method, which is characterized in that by dehydroacetic acid prepare in the tail gas that generates through cloth bag
It is discharged after being come into full contact with buck film after formula deduster.
2. a kind of dehydroacetic acid exhaust gas treating method according to claim 1, which is characterized in that the buck film passes through alkali
Liquid sprays to be formed.
3. a kind of dehydroacetic acid exhaust gas treating method according to claim 2, which is characterized in that the lye is by repeatedly
After cyclic absorption reaches saturation, sodium dehydroacetate is precipitated completely by salt acid for adjusting pH to 3-4.
4. a kind of dehydroacetic acid exhaust gas treating method according to claim 2, which is characterized in that the lye is 2%-
5% sodium hydroxide solution.
5. a kind of device for applying dehydroacetic acid exhaust gas treating method as described in claim 1, which is characterized in that including cloth bag
Formula deduster (1) and water dust scrubber (2), the front end receiver tail gas of the fiber bag precipitator (1), the fiber bag precipitator
(1) rear end is connect with the inlet end of water dust scrubber (2), is provided with lye in the water dust scrubber (2).
6. according to right want 5 described in a kind of acetate hydrogen exhaust gas processing device, which is characterized in that the water dust scrubber (2) packet
Lye pond (21) is included, admission line (22), pond (23) is precipitated, spray head (24), filled layer (25), moisture film cylinder (26), blower
(28) lower section in moisture film cylinder (26) is set and is firmly connected with it, the analysis with blowdown stack (29), the lye pond (21)
Pond (23) are connect with lye pond (21) out, and the head (24) and filled layer (25) setting of spraying is described inside moisture film cylinder (26)
Head (24) setting is sprayed in the top of filled layer (25), the head (24) that sprays is arranged along the inner wall of moisture film cylinder (26), described
Admission line (22) is connect with the rear end of fiber bag precipitator (1), and the other end of the admission line (22) is connected to moisture film cylinder
(26) top of inside, the exhaust gas channel (27) is connected to the top of moisture film cylinder (26), under the exhaust gas channel (27)
End is connected to blowdown stack (29), and the lye pond (21) is connected to by water pump with head (24) is sprayed.
7. a kind of acetate hydrogen exhaust gas processing device according to claim 6, which is characterized in that blower (28) setting exists
The air duct of the side of blowdown stack (29), the blower (28) is connected to the lower section of blowdown stack (29).
8. a kind of acetate hydrogen exhaust gas processing device according to claim 6, which is characterized in that set in the lye pond (21)
It is equipped with pH meter (212), the side of the lye pond (21) is provided with lye adding mouth (211), and precipitation pond (23) side is set
It is equipped with hydrochloric acid adding mouth (231).
9. a kind of acetate hydrogen exhaust gas processing device according to claim 5, which is characterized in that the fiber bag precipitator
It (1) include cabinet (11), air inlet (12), air outlet (13), pocket (14) and ash bucket (15), the air inlet (12) is for connecing
Finish up gas, and the air outlet (13) is connected to water dust scrubber (2), and pocket (14) setting is in cabinet (11), the bag
Room (14) rear and front end is connected to air inlet (12) and air outlet (13) respectively, and the ash bucket (15) is arranged under pocket (14)
Side, the ash bucket (15) and pocket (14) are fixedly connected with cabinet (11) respectively.
10. a kind of acetate hydrogen exhaust gas processing device according to claim 5, which is characterized in that in the lye pond (21)
It is provided with the sodium hydroxide solution of 2%-5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235095.8A CN109925864A (en) | 2019-03-26 | 2019-03-26 | A kind of dehydroacetic acid exhaust gas treating method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910235095.8A CN109925864A (en) | 2019-03-26 | 2019-03-26 | A kind of dehydroacetic acid exhaust gas treating method and device |
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| Publication Number | Publication Date |
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| CN109925864A true CN109925864A (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910235095.8A Withdrawn CN109925864A (en) | 2019-03-26 | 2019-03-26 | A kind of dehydroacetic acid exhaust gas treating method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685230A (en) * | 2020-12-30 | 2022-07-01 | 南通醋酸化工股份有限公司 | Method for purifying tail gas in dehydroacetic acid production process |
-
2019
- 2019-03-26 CN CN201910235095.8A patent/CN109925864A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685230A (en) * | 2020-12-30 | 2022-07-01 | 南通醋酸化工股份有限公司 | Method for purifying tail gas in dehydroacetic acid production process |
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Application publication date: 20190625 |
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