CN104761730A - Replacement device and method for trace organic solvent in polyvinyl alcohol - Google Patents
Replacement device and method for trace organic solvent in polyvinyl alcohol Download PDFInfo
- Publication number
- CN104761730A CN104761730A CN201410008038.3A CN201410008038A CN104761730A CN 104761730 A CN104761730 A CN 104761730A CN 201410008038 A CN201410008038 A CN 201410008038A CN 104761730 A CN104761730 A CN 104761730A
- Authority
- CN
- China
- Prior art keywords
- polyvinyl alcohol
- carrier gas
- organic solvent
- blocking valve
- tray drier
- 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.)
- Granted
Links
Landscapes
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to a replacement device and method for a trace organic solvent in polyvinyl alcohol; steam is introduced while hot carrier gas is introduced in a tray dryer, the trace organic solvent in the polyvinyl alcohol is replaced with the steam while the polyvinyl alcohol is dried, and the trace organic solvent is vaporized and discharged along with tail gas; the steam is condensed when meeting a polyvinyl alcohol powder and goes into the polyvinyl alcohol, the content of the organic solvent in the polyvinyl alcohol is decreased, and thus the quality of the polyvinyl alcohol is improved.
Description
Technical field
The present invention relates to the solvent exchange technology of chemical field, particularly relate to replacing apparatus and the method thereof of minim organic solvent in polyvinyl alcohol.
Background technology
Polyvinyl alcohol is one of main raw material manufacturing caking agent, therefore the quality of polyvinyl alcohol will directly have influence on the quality of caking agent quality, and because the content of the organic solvent (mainly methyl alcohol) contained by alcoholysis process is one of important factor affecting polyvinyl alcohol quality in polyvinyl alcohol.
At present, in the polyvinyl alcohol of drying, the residual quantity of organic solvent is up to 2-4%, and these organic solvents can volatilize in packed and transported, both dangerous, causes waste again, have impact on the product quality of polyvinyl alcohol.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of replacing apparatus reducing minim organic solvent in the polyvinyl alcohol of organic solvent content in polyvinyl alcohol.
For solving the problem, the replacing apparatus of minim organic solvent in polyvinyl alcohol of the present invention, comprise the tray drier of saturation steam indirect heating, it is characterized in that: opening for feed, the discharge port of described tray drier are connected with blocking valve I, blocking valve II respectively, its carrier gas inlet is connected with saturation steam pipeline, and its gaseous phase outlet is connected with fly-ash separator; The gaseous phase outlet of described fly-ash separator is connected with the opening for feed of mist eliminator by the condenser of indirect cooling-type, and its discharge port is connected with blocking valve III; The discharge port of described mist eliminator is connected with solvent recovering system, and its gaseous phase outlet and carrier gas supply system are connected with carrier gas recovery system with the carrier gas inlet of described tray drier through the well heater of recirculation blower, indirect heating type all successively.
Another technical problem to be solved by this invention is to provide a kind of method of replacing reducing minim organic solvent in the polyvinyl alcohol of organic solvent content in polyvinyl alcohol.
For solving the problem, the method for replacing of minim organic solvent in polyvinyl alcohol of the present invention, is characterized in that: the method comprises the following steps:
A, dry after enter in tray drier containing the polyvinyl alcohol of minim organic solvent carry out drying by blocking valve I while, polyvinyl alcohol and the steam entered from carrier gas inlet in tray drier and hot carrier gas directly contact the displacement carrying out organic solvent in polyvinyl alcohol and steam, then the polyvinyl alcohol with moisture draws off through blocking valve II, tail gas enters in fly-ash separator and carries out dedusting, and the powder of collection draws off through blocking valve III;
B, tail gas after fly-ash separator dedusting enter in mist eliminator and dehumidify after condenser condenses, and the liquid of collection is recovered;
C, tail gas after mist eliminator dehumidifying enter in well heater through recirculation blower and carry out indirect heat exchange together with the carrier gas in carrier gas supply system, enter in tray drier through the tail gas of heat exchange and wherein a part and the steam of carrier gas, rest part enters in carrier gas recovery system.
The present invention compared with prior art has the following advantages:
1, the present invention passes into steam pass into hot carrier gas in tray drier while, while dry polyethylene alcohol, make the minim organic solvent in polyvinyl alcohol and water vapor replace, minim organic solvent is vaporized discharges with tail gas, water vapor is met the condensation of polyvinyl alcohol powder and is entered in polyvinyl alcohol, organic solvent content in polyvinyl alcohol is reduced, thus improves the quality of polyvinyl alcohol.
2, the present invention does not collect the polyvinyl alcohol powder taken out of by carrier gas by means of only fly-ash separator, and by collecting the organic solvent in tail gas after carrying out dedusting, condensation to tray drier tail gas out, thus reduce costs, avoid waste.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is process flow sheet of the present invention.
In figure: 1-blocking valve I 2-tray drier 3-blocking valve II 4-well heater 5-recirculation blower 6-mist eliminator 7-fly-ash separator 8-blocking valve III 9-condenser.
Embodiment
As shown in Figure 1, the replacing apparatus of minim organic solvent in polyvinyl alcohol, this equipment comprises the tray drier 2 of saturation steam indirect heating; Opening for feed, the discharge port of tray drier 2 are connected with blocking valve I 1, blocking valve II 3 respectively, and its carrier gas inlet is connected with saturation steam pipeline, and its gaseous phase outlet is connected with fly-ash separator 7; The gaseous phase outlet of fly-ash separator 7 is connected with the opening for feed of mist eliminator 6 by the condenser 9 of indirect cooling-type, and its discharge port is connected with blocking valve III 8; The discharge port of mist eliminator 6 is connected with solvent recovering system, and its gaseous phase outlet and carrier gas supply system are connected with carrier gas recovery system with the carrier gas inlet of tray drier 2 through the well heater 4 of recirculation blower 5, indirect heating type all successively.
As shown in Figure 1, the method for replacing of minim organic solvent in polyvinyl alcohol, the method comprises the following steps:
A, dry after enter in tray drier 2 containing the polyvinyl alcohol of minim organic solvent carry out drying by blocking valve I 1 while, polyvinyl alcohol and the steam entered from carrier gas inlet in tray drier 2 and hot carrier gas directly contact the displacement carrying out organic solvent in polyvinyl alcohol and steam, polyvinyl alcohol with moisture draws off through blocking valve II 3, tail gas enters in fly-ash separator 7 and carries out dedusting, and the powder of collection draws off through blocking valve III 8;
B, tail gas after fly-ash separator 7 dedusting enter in mist eliminator 6 and dehumidify after condenser 9 condensation, and the liquid of collection is recovered;
C, tail gas after mist eliminator 6 dehumidifies enter in well heater 4 through recirculation blower 5 and carry out indirect heat exchange together with the carrier gas in carrier gas supply system, enter in tray drier 2 through the tail gas of heat exchange and wherein a part and the steam of carrier gas, rest part enters in carrier gas recovery system.
Claims (2)
1. the replacing apparatus of minim organic solvent in polyvinyl alcohol, comprise the tray drier (2) of saturation steam indirect heating, it is characterized in that: opening for feed, the discharge port of described tray drier (2) are connected with blocking valve I (1), blocking valve II (3) respectively, its carrier gas inlet is connected with saturation steam pipeline, and its gaseous phase outlet is connected with fly-ash separator (7); The gaseous phase outlet of described fly-ash separator (7) is connected with the opening for feed of mist eliminator (6) by the condenser (9) of indirect cooling-type, and its discharge port is connected with blocking valve III (8); The discharge port of described mist eliminator (6) is connected with solvent recovering system, and its gaseous phase outlet and carrier gas supply system are connected with carrier gas recovery system with the carrier gas inlet of described tray drier (2) through the well heater (4) of recirculation blower (5), indirect heating type all successively.
2. use the method for minim organic solvent in the replacing apparatus displacement polyvinyl alcohol of minim organic solvent in polyvinyl alcohol as claimed in claim 1, it is characterized in that: the method comprises the following steps:
A, dry after enter containing the polyvinyl alcohol of minim organic solvent and carry out drying by blocking valve I (1) in tray drier (2) while, polyvinyl alcohol and the steam entered from carrier gas inlet in tray drier (2) and hot carrier gas directly contact the displacement carrying out organic solvent in polyvinyl alcohol and steam, then the polyvinyl alcohol with moisture draws off through blocking valve II (3), tail gas enters in fly-ash separator (7) and carries out dedusting, and the powder of collection draws off through blocking valve III (8);
B, tail gas after fly-ash separator (7) dedusting enter in mist eliminator (6) and dehumidify after condenser (9) condensation, and the liquid of collection is recovered;
C, tail gas after mist eliminator (6) dehumidifying enter in well heater (4) through recirculation blower (5) and carry out indirect heat exchange together with the carrier gas in carrier gas supply system, enter in tray drier (2) through the tail gas of heat exchange and wherein a part and the steam of carrier gas, rest part enters 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 true CN104761730A (en) | 2015-07-08 |
| CN104761730B CN104761730B (en) | 2017-04-05 |
Family
ID=53643850
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 |
|---|---|
| CN (1) | CN104761730B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621550A (en) * | 2016-12-01 | 2017-05-10 | 中国石化长城能源化工（宁夏）有限公司 | Novel processing method and device for producing polyvinyl alcohol powder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537710A (en) * | 2003-04-14 | 2004-10-20 | 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 |
-
2014
- 2014-01-08 CN CN201410008038.3A patent/CN104761730B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537710A (en) * | 2003-04-14 | 2004-10-20 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621550A (en) * | 2016-12-01 | 2017-05-10 | 中国石化长城能源化工（宁夏）有限公司 | Novel processing method and device for producing polyvinyl alcohol powder |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104761730B (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9989310B2 (en) | Dryer exhaust heat recovery | |
| CN106268198A (en) | A kind of desulfurization fume dehumidifying and water reclamation system and method | |
| CN105498446A (en) | Method for recycling organic matter through organic waste gas adsorption, steam desorption and fractional condensation | |
| CN205850536U (en) | A kind of tower tail gas treatment device | |
| CN102489106A (en) | Method for cycle collection of exhaust gas by adopting secondary adsorption | |
| KR101982374B1 (en) | Process and device for treating volatile organic compound | |
| CN102809276B (en) | Energy recovery method and device used for drying system | |
| CN112807723A (en) | Spray drying tower tail gas heat recovery system | |
| CN111059890A (en) | Material drying system and method | |
| CN203715548U (en) | Equipment for replacing trace organic solvent in polyvinyl alcohol | |
| CN104761730A (en) | Replacement device and method for trace organic solvent in polyvinyl alcohol | |
| CN108939705A (en) | The purification method and device of smog in a kind of air-flow | |
| CN103673148A (en) | Double-row runner ultra-low dew point dehumidification method and dedicated device thereof | |
| CN102889776A (en) | Cyclic utilization production device of waste gas and steam of dryer | |
| CN216011437U (en) | Condensation dehumidification heating system for closed-circuit drying process | |
| CN102476011A (en) | Waste gas recovery method in printing packaging industry | |
| CN105020999A (en) | Roller dryer | |
| CN209116712U (en) | A kind of two-stage drying system | |
| KR101580679B1 (en) | Waste heat recovery unit for sludge dryer | |
| CN104710094A (en) | Printing and dyeing sludge drying method and apparatus thereof | |
| CN110841439A (en) | Organic waste gas treatment system and treatment method thereof | |
| CN205308102U (en) | High -efficient environmental protection drying system | |
| CN210417145U (en) | Powder cooling and conveying device | |
| CN204853745U (en) | Heat pump dehumidification unit | |
| CN203083326U (en) | Circulating device of inert gases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |