CN101972551A - Method for recovering and extracting solvent in slag - Google Patents
Method for recovering and extracting solvent in slag Download PDFInfo
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- CN101972551A CN101972551A CN2010102831285A CN201010283128A CN101972551A CN 101972551 A CN101972551 A CN 101972551A CN 2010102831285 A CN2010102831285 A CN 2010102831285A CN 201010283128 A CN201010283128 A CN 201010283128A CN 101972551 A CN101972551 A CN 101972551A
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Abstract
The invention relates to a method for recovering and extracting a solvent in slag, which comprises step of recovering and extracting the solvent in the slag by a dry method in a negative pressure system comprising an extracting tank (1), a condenser (2), a cooler (3), a vapour and liquid separator (4), liquid receiving tanks (6) and (10), an oil-free vacuum pump (7), a plate-type condenser (8) and a freezing compressor (9) under the condition of maintaining the temperature in the extracting tank (1) to be 95 DEG C and the pressure therein to be from -0.03 to -0.02. By utilizing the method to recover and extract the solvent in the slag, the recovering time can be shortened about one half, the energy consumption is reduced by 30 percent and the recovery of the solvent is increased by 10 percent; moreover, water is not added in the whole recovering process so that no sewage is discharged when in slagging and the environmental-protection problem is solved.
Description
Technical field
The present invention relates to a kind of method of extracting solvent in the slag that reclaims.
Background technology
In the traditional Chinese medicine extraction industry, abstraction process adopts multi-function extractor mostly at present, after extracting with organic solvent, must reclaim the solvent that extracts in the slag.Nearly all factory all is that straight-through Steam Heating reclaimed after employing added water now.The shortcoming of this recovery method is that recovery time is long, and the energy consumption height has large amount of sewage during deslagging, be unfavorable for environmental protection, and water content is bigger in the recovered solvent, needs to handle again and could use.
Summary of the invention
Purpose of the present invention is intended to disclose the dry method that a kind of energy consumption is low, solvent recovering yield is high and reclaims the method for extracting solvent in the slag.
The present invention be by extractor, condenser, cooler, vapour liquid separator, be subjected in the negative pressure system that flow container, oilless vacuum pump, plate-type condenser, refrigerant condenser constitute, keep in the extractor temperature and reclaim and extract solvent in the slag at 95 ℃, pressure dry method between-0.03～-0.02; Evacuation port place at vapour liquid separator connects an oilless vacuum pump, and oilless vacuum pump links to each other with a condenser again, and this condenser adopts compressor cooling; The solvent that vapour liquid separator is separated and send into negative pressure system earlier by condenser cooling recovered solvent and be subjected to flow container is sent into the normal pressure solvent tank after reaching certain amount again.
Method of the present invention is used for reclaiming the solvent that extracts slag, recovery time can shorten near half, energy consumption reduces by 30%, solvent recovering yield improves 10%, and does not add water in the whole recovery, without sewage discharge during deslagging has solved environmental issue.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
1, extractor 2, condenser 3, cooler 4, vapour liquid separator
5, solvent tank 6, be subjected to flow container 7, oilless vacuum pump 8, plate-type condenser
9, refrigerant condenser 10, be subjected to flow container
The specific embodiment
As shown in the figure, the present invention be by extractor (1), condenser (2), cooler (3), vapour liquid separator (4), be subjected in the negative pressure system that flow container (6) (10), oilless vacuum pump (7), plate-type condenser (8), refrigerant condenser (9) constitute, keep interior the temperature of extractor (1) and reclaim solvent in the extraction slag at 95 ℃, pressure dry method between-0.03～-0.02; Connect an oilless vacuum pump (7) at the evacuation port place of vapour liquid separator (4), oilless vacuum pump (7) again with a 115m
2Condenser (8) links to each other, and this condenser (8) adopts compressor (9) refrigeration; The solvent that vapour liquid separator (4) is separated and cool off recovered solvent by condenser (8) and send into negative pressure system earlier and be subjected to flow container (6) and (10) is sent into normal pressure solvent tank (5) after reaching certain amount again.
When reclaiming solvent, close extraction equipment and extraneous all valves that are connected, start vavuum pump (7), keep negative pressure-0.03～-0.02Mpa between, open the steam valve that extractor (1) chuck heats and heat, the interior temperature maintenance of extractor (1) is about 95 ℃.Because be that negative pressure reclaims, the heat of evaporation of solvent descends, and is capable of reducing energy consumption more than 30%, evaporation rate is accelerated simultaneously, and recovery time can reduce half, and does not add water in the whole recovery process, does not have sewage during deslagging and produces.
Claims (1)
1. one kind is reclaimed the method for extracting solvent in the slag, it is characterized in that it be by extractor (1), condenser (2), cooler (3), vapour liquid separator (4), be subjected in the negative pressure system that flow container (6) (10), oilless vacuum pump (7), plate-type condenser (8), refrigerant condenser (9) constitute, keep interior the temperature of extractor (1) and reclaim solvent in the extraction slag at 95 ℃, pressure dry method between-0.03～-0.02; Connect an oilless vacuum pump (7) at the evacuation port place of vapour liquid separator (4), oilless vacuum pump (7) again with a 115m
2Condenser (8) links to each other, and this condenser (8) adopts compressor (9) refrigeration; The solvent that vapour liquid separator (4) is separated and cool off recovered solvent by condenser (8) and send into negative pressure system earlier and be subjected to flow container (6) and (10) is sent into normal pressure solvent tank (5) after reaching certain amount again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102831285A CN101972551A (en) | 2010-09-16 | 2010-09-16 | Method for recovering and extracting solvent in slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102831285A CN101972551A (en) | 2010-09-16 | 2010-09-16 | Method for recovering and extracting solvent in slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101972551A true CN101972551A (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102831285A Pending CN101972551A (en) | 2010-09-16 | 2010-09-16 | Method for recovering and extracting solvent in slag |
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| CN (1) | CN101972551A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499155A (en) * | 2018-02-28 | 2018-09-07 | 北京华信依耀工程咨询服务有限公司 | A method of increasing the solvent rate of recovery and reduces volatile organic compounds discharge |
-
2010
- 2010-09-16 CN CN2010102831285A patent/CN101972551A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108499155A (en) * | 2018-02-28 | 2018-09-07 | 北京华信依耀工程咨询服务有限公司 | A method of increasing the solvent rate of recovery and reduces volatile organic compounds discharge |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110216 |