CN104761730B - The replacing apparatus and its method of minim organic solvent in polyvinyl alcohol - Google Patents
The replacing apparatus and its method of minim organic solvent in polyvinyl alcohol Download PDFInfo
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- CN104761730B CN104761730B CN201410008038.3A CN201410008038A CN104761730B CN 104761730 B CN104761730 B CN 104761730B CN 201410008038 A CN201410008038 A CN 201410008038A CN 104761730 B CN104761730 B CN 104761730B
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- polyvinyl alcohol
- carrier gas
- organic solvent
- jing
- tray drier
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Abstract
The present invention relates in polyvinyl alcohol minim organic solvent replacing apparatus and its method, the present invention is passed through steam while being passed through hot carrier gas in tray drier, while dry polyethylene alcohol, cause the minim organic solvent in polyvinyl alcohol to enter line replacement with water vapour, minim organic solvent is vaporized discharges with tail gas, water vapour meets the condensation of polyvinyl alcohol powder in polyvinyl alcohol, so that the organic solvent content in polyvinyl alcohol is reduced, so as to improve the quality of polyvinyl alcohol.
Description
Technical field
The present invention relates to the solvent replacement technique of chemical field, more particularly in polyvinyl alcohol minim organic solvent displacement
Device and method thereof.
Background technology
Polyvinyl alcohol is to manufacture one of primary raw material of bonding agent, therefore the quality of polyvinyl alcohol will directly influence bonding
The quality of agent quality, and because of the organic solvent contained by alcoholysis process in polyvinyl alcohol（Mainly methanol）Content be to affect poly- second
One of key factor of enol quality.
At present, in the polyvinyl alcohol of drying, the residual quantity of organic solvent is up to 2-4%, and these organic solvents are in packaging fortune
Can volatilize in defeated, it is both dangerous, cause again to waste, have impact on the product quality of polyvinyl alcohol.
The content of the invention
The technical problem to be solved is to provide a kind of polyethylene for reducing organic solvent content in polyvinyl alcohol
The replacing apparatus of minim organic solvent in alcohol.
To solve the above problems, the replacing apparatus of minim organic solvent in polyvinyl alcohol of the present invention, including saturation
The tray drier of steam indirectly heat, it is characterised in that：The charging aperture of the tray drier, discharging opening respectively with blocking valve
Ith, blocking valve II is connected, and its carrier gas inlet is connected with saturated vapor pipeline, and its gaseous phase outlet is connected with cleaner unit；The cleaner unit
Gaseous phase outlet be connected with the charging aperture of demister by the condenser of indirect cooling-type, its discharging opening is connected with blocking valve III；
The discharging opening of the demister is connected with solvent recovering system, its gaseous phase outlet and carrier gas supply system Jing circulated airs successively
Machine, the heater of indirect heating type are connected with the carrier gas inlet and carrier gas recovery system of the tray drier.
Another technical problem to be solved by this invention is to provide and a kind of reduces organic solvent content in polyvinyl alcohol
The method of replacing of minim organic solvent in polyvinyl alcohol.
To solve the above problems, the method for replacing of minim organic solvent in polyvinyl alcohol of the present invention, its feature exist
In：The method is comprised the following steps：
After a, drying, the polyvinyl alcohol containing minim organic solvent is dried in tray drier by blocking valve I
Meanwhile, polyvinyl alcohol with from carrier gas inlet into tray drier in steam and hot carrier gas directly contact carry out in polyvinyl alcohol
Organic solvent and steam displacement, then the polyvinyl alcohol Jing blocking valves II with moisture draw off, tail gas enters in cleaner unit
Row dedusting, the powder Jing blocking valves III of collection draw off；
Enter after the condensed device condensation of tail gas after b, removing dust device dedusting and dehumidified in demister, the liquid quilt of collection
Reclaim；
C, the Jing circulating fans together with the carrier gas in carrier gas supply system of the tail gas Jing after demister dehumidifying enter heater
In carry out indirect heat exchange, the tail gas of Jing heat exchange and a portion and steam of carrier gas are entered in tray drier, remainder
Into in carrier gas recovery system.
The present invention has advantages below compared with prior art：
1st, steam is passed through while the present invention is passed through hot carrier gas in tray drier, make while dry polyethylene alcohol
The minim organic solvent obtained in polyvinyl alcohol enters line replacement with water vapour, and minim organic solvent is vaporized discharges with tail gas, and water steams
Vapour meets the condensation of polyvinyl alcohol powder in polyvinyl alcohol so that the organic solvent content in polyvinyl alcohol is reduced, so as to improve
The quality of polyvinyl alcohol.
2nd, the present invention not only collects the polyvinyl alcohol powder taken out of by carrier gas by cleaner unit, and by tray drying
Machine tail gas out carry out dedusting, condensation after collect tail gas in organic solvent, so as to reduces cost, it is to avoid waste.
Description of the drawings
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in further detail.
Fig. 1 is the process chart of the present invention.
In figure：I 2- tray drier 3- blocking valves of 1- blocking valves, II 4- heater 5- circulating fan 6- are removed
III 9- condensers of day with fog 7- cleaner unit 8- blocking valves.
Specific embodiment
As shown in figure 1, in polyvinyl alcohol minim organic solvent replacing apparatus, the equipment includes saturated vapor indirectly heat
Tray drier 2；The charging aperture of tray drier 2, discharging opening are connected with blocking valve I 1, blocking valve II 3 respectively, and its carrier gas is entered
Mouth is connected with saturated vapor pipeline, and its gaseous phase outlet is connected with cleaner unit 7；The gaseous phase outlet of cleaner unit 7 passes through indirect cooling-type
Condenser 9 be connected with the charging aperture of demister 6, its discharging opening is connected with blocking valve III 8；The discharging opening and solvent of demister 6
Recovery system is connected, its gaseous phase outlet and carrier gas supply system successively the heater 4 of Jing circulating fans 5, indirect heating type with
The carrier gas inlet of tray drier 2 is connected with carrier gas recovery system.
As shown in figure 1, in polyvinyl alcohol minim organic solvent method of replacing, the method comprises the following steps：
After a, drying, the polyvinyl alcohol containing minim organic solvent is dried in tray drier 2 by blocking valve I 1
While, polyvinyl alcohol with from carrier gas inlet into tray drier 2 in steam and hot carrier gas directly contact carry out polyethylene
The displacement of organic solvent and steam in alcohol, the polyvinyl alcohol Jing blocking valves II 3 with moisture draw off, and tail gas is entered in cleaner unit 7
Dedusting is carried out, the powder Jing blocking valves III 8 of collection draw off；
The condensed device 9 of tail gas after b, 7 dedusting of removing dust device is entered after condensing and is dehumidified in demister 6, the liquid of collection
Body is recovered；
C, the Jing circulating fans 5 together with the carrier gas in carrier gas supply system of the tail gas Jing after demister 6 dehumidifies enter heating
Indirect heat exchange is carried out in device 4, the tail gas of Jing heat exchange and a portion and steam of carrier gas are entered in tray drier 2, remaining
It is partially in carrier gas recovery system.
Claims (2)
1. in polyvinyl alcohol minim organic solvent replacing apparatus, including the tray drier of saturated vapor indirectly heat（2）, its
It is characterised by：The tray drier（2）Charging aperture, discharging opening respectively with blocking valve I（1）, blocking valve II（3）It is connected, its
Carrier gas inlet is connected with saturated vapor pipeline, its gaseous phase outlet and cleaner unit（7）It is connected；The cleaner unit（7）Gaseous phase outlet
By the condenser of indirect cooling-type（9）With demister（6）Charging aperture be connected, its discharging opening and blocking valve III（8）It is connected；Institute
State demister（6）Discharging opening be connected with solvent recovering system, its gaseous phase outlet and carrier gas supply system Jing circulated airs successively
Machine（5）, indirect heating type heater（4）With the tray drier（2）Carrier gas inlet be connected with carrier gas recovery system.
2. using micro in the replacing apparatus displacement polyvinyl alcohol of minim organic solvent in polyvinyl alcohol as claimed in claim 1
The method of organic solvent, it is characterised in that：The method is comprised the following steps：
After a, drying, the polyvinyl alcohol containing minim organic solvent passes through blocking valve I（1）Into tray drier（2）Inside it is dried
While, polyvinyl alcohol with enter tray drier from carrier gas inlet（2）Interior steam and hot carrier gas directly contact carry out poly- second
The displacement of organic solvent in enol and steam, then polyvinyl alcohol Jing blocking valves II with moisture（3）Draw off, tail gas is entered and removed
Dirt device（7）In carry out dedusting, the powder Jing blocking valves III of collection（8）Draw off；
B, removing dust device（7）The condensed device of tail gas after dedusting（9）Demister is entered after condensation（6）In dehumidified, collection
Liquid is recovered；
C, Jing demister（6）Tail gas after dehumidifying Jing circulating fans together with the carrier gas in carrier gas supply system（5）Into heating
Device（4）In carry out indirect heat exchange, the tail gas of Jing heat exchange and a portion and steam of carrier gas enter tray drier（2）It is interior,
Remainder is entered in carrier gas recovery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008038.3A CN104761730B (en) | 2014-01-08 | 2014-01-08 | The replacing apparatus and its method of minim organic solvent in polyvinyl alcohol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410008038.3A CN104761730B (en) | 2014-01-08 | 2014-01-08 | The replacing apparatus and its method of minim organic solvent in polyvinyl alcohol |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104761730A CN104761730A (en) | 2015-07-08 |
| CN104761730B true CN104761730B (en) | 2017-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410008038.3A Active CN104761730B (en) | 2014-01-08 | 2014-01-08 | The replacing apparatus and its method of minim organic solvent in polyvinyl alcohol |
Country Status (1)
| Country | Link |
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| CN (1) | CN104761730B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621550B (en) * | 2016-12-01 | 2019-12-06 | 中国石化长城能源化工（宁夏）有限公司 | Novel treatment method and device for producing polyvinyl alcohol powder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100496931C (en) * | 2003-04-14 | 2009-06-10 | 兰州瑞德干燥技术有限公司 | Polyvinyl alcohol two-stage drying technology |
| CN101666575A (en) * | 2008-09-03 | 2010-03-10 | 淄博矿业集团有限责任公司 | Drying process and drying system for material containing low-boiling point, inflammable and explosive organic solvent |
| CN103022501A (en) * | 2012-12-05 | 2013-04-03 | 上海锦众信息科技有限公司 | Method for preparing negative-pole tin-carbon composite material for lithium ion battery |
| CN203715548U (en) * | 2014-01-08 | 2014-07-16 | 天华化工机械及自动化研究设计院有限公司 | Equipment for replacing trace organic solvent in polyvinyl alcohol |
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2014
- 2014-01-08 CN CN201410008038.3A patent/CN104761730B/en active Active
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| Publication number | Publication date |
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| CN104761730A (en) | 2015-07-08 |
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