CN203400514U - Hydroxy propyl cellulose solvent recycling device - Google Patents
Hydroxy propyl cellulose solvent recycling device Download PDFInfo
- Publication number
- CN203400514U CN203400514U CN201320449709.0U CN201320449709U CN203400514U CN 203400514 U CN203400514 U CN 203400514U CN 201320449709 U CN201320449709 U CN 201320449709U CN 203400514 U CN203400514 U CN 203400514U
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- outlet
- solvent
- condenser
- storage tank
- slot
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses a hydroxy propyl cellulose solvent recycling device. The hydroxy propyl cellulose solvent recycling device comprises a desolvation kettle, wherein an outlet at the top end of the desolvation kettle is connected with an inlet of a condenser; an outlet of the condenser is connected with an inlet of a first solvent slot and an inlet of a second solvent slot; an outlet of the first solvent slot and an outlet of the second solvent slot are connected with an inlet of a heater; a rectifying tower is arranged on the top of the heater; a cut fraction outlet of the rectifying tower is connected with a storage tank by a first condenser; a bottom outlet of the storage tank is connected with a first receiving slot and a second receiving slot; an outlet of the storage tank is connected with a reflux tube of the rectifying tower by a liquid level meter; the storage tank is further connected with a waste gas treatment device by a second condenser. According to the hydroxy propyl cellulose solvent recycling device disclosed by the utility model, a solvent is separated before being rectified, so that energy consumption for recycling a toluene-isopropanol solvent is lowered; moreover, the isopropanol can be evaporated and condensed in a toluene rectifying process, so that solvent recycling efficiency is improved. Besides, the outlet of the storage slot is connected with the reflux tube of the rectifying tube, so that pressure intensity in the storage slot is stable, and rectifying efficiency is improved.
Description
Technical field
The utility model relates to a kind of solvent recovery unit, relates in particular to a kind of hydroxypropyl cellulose solvent recovery unit.
Background technology
At present, in the production process of domestic hydroxypropyl cellulose, reaction dissolvent is all that these solvents need recycling use with two kinds of solvents of toluene-isopropyl alcohol composite forming according to a certain percentage.Existing solvent recovery unit generally reclaims solvent by passing through the mode of rectifying or simple distillation after precipitation again, there is feature simple to operate, convenient solvent reclaiming, yet because solvent is mixed solvent, in distillation process, consume energy larger, increased the cost of solvent recovery; On the other hand, in distillation process, owing to containing the material that has comprised highly volatile in solvent, volatilization produces stronger pressure in groove by meeting, affect the pressure of whole device.
Utility model content
The utility model is for the deficiencies in the prior art, and object is to provide a kind of less energy consumption, solvent recovery efficiency is high, pressure is stable hydroxypropyl cellulose solvent recovery unit.
For achieving the above object, the technical solution adopted in the utility model is as follows: a kind of hydroxypropyl cellulose solvent recovery unit, comprise precipitation still, described precipitation still top outlet is connected with the entrance of condenser by pipeline, the outlet of described condenser is connected with the entrance of the first flux bath and the second flux bath by pipeline, the first described flux bath and the outlet of the second flux bath are connected with the entrance of heater by pipeline, described heater top is provided with rectifying column, the cut outlet of described rectifying column connects storage tank by the first condenser, the outlet at bottom of described storage tank connects the first groove and the second groove, the outlet of described storage tank is connected with the return duct of rectifying column by liquid level gauge, described storage tank also connects emission-control equipment by the second condenser.
Described condenser adopts thin tubesheet structure.
Compared with prior art, the beneficial effects of the utility model are mainly reflected in: solvent carries out separation before rectifying, greatly reduce the energy consumption that toluene-isopropanol solvent reclaims, and can carry out evaporative condenser to isopropyl alcohol in the process of carrying out toluene rectifying, greatly improved the efficiency of solvent recovery; On the other hand, in the outlet of storage tank, by liquid level gauge, be connected with the return duct of rectifying column, guarantee that the pressure in storage tank is stable, improve rectification efficiency.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
In figure: precipitation still 1, condenser 2, the first flux bath 31, the second flux bath 32, heater 4, rectifying column 5, the first condenser 61, the second condenser 62, storage tank 7, the first groove 81, the second groove 82, emission-control equipment 9, liquid level gauge 10.
The specific embodiment
Below in conjunction with specific embodiment, structure of the present utility model is described further.
As shown in Figure 1, a kind of hydroxypropyl cellulose solvent recovery unit, comprise precipitation still 1, the 1 top outlet of precipitation still is connected with the entrance of condenser 2 by pipeline, the outlet of condenser 2 is connected with the entrance of the first flux bath 31 and the second flux bath 32 by pipeline, the outlet of the first flux bath 31 and the second flux bath 32 is connected with the entrance of heater 4 by pipeline, heater 4 tops are provided with rectifying column 5, the cut outlet of rectifying column 5 connects storage tank 7 by the first condenser 61, the outlet at bottom of storage tank 7 connects the first groove 81 and the second groove 82, the outlet of storage tank 7 is connected with the return duct of rectifying column 5 by liquid level gauge 10, storage tank 3 also connects emission-control equipment 9 by the second condenser 62, condenser 2 adopts thin tubesheet structure.
During work, open cold condenser 2 leads to the material inlet valve of the first flux bath 31, precipitation still 1 is slowly heated, after low boiling point solvent evaporative condenser, enter the first flux bath 31, again after heater 4 Steam Heating, steam enters in rectifying column 5, rectifying enters condensation the first condenser 61 from the cut outlet of rectifying column 5 later, the liquid that condensation obtains enters in storage tank 7, volatile material is by after the second condenser 62 time condensations, gas enters exhaust treatment system 9, liquid in storage tank 7 enters the first groove 81, the outlet of storage tank 7 is connected with the return duct of rectifying column 5 by liquid level gauge 10, avoid the interior volatile substances of storage tank 7 and cause storage tank 7 pressure unstable, the solvent that recovery obtains enters in the first groove 81 by the liquid-phase outlet of storage tank 7, the rectifying that completes toluene is reclaimed.
Close condenser 2 towards the material inlet valve of the first flux bath 31, open cold condenser 2 leads to the material inlet valve of the second flux bath 32, precipitation still 1 is proceeded to the heating that heats up, after solvent evaporative condenser, enter in the second flux bath 32, after low boiling point solvent rectifying has been reclaimed, again after heater 4 Steam Heating, steam enters in rectifying column 5, rectifying enters condensation the first condenser 61 from the cut outlet of rectifying column 5 later, the liquid that condensation obtains enters in storage tank 7, volatile material is by after the second condenser 62 time condensations, gas enters exhaust treatment system 9, liquid in storage tank 7 enters the second groove 82, the outlet of storage tank 7 is connected with the return duct of rectifying column 5 by liquid level gauge 10, avoid the interior volatile substances of storage tank 7 and cause storage tank 7 pressure unstable, the solvent that recovery obtains enters in the second groove 82 by the liquid-phase outlet of storage tank 7, the rectifying that completes isopropyl alcohol is reclaimed.
Because solvent carries out separation before rectifying, greatly reduce the energy consumption that toluene-isopropanol solvent reclaims, and can carry out evaporative condenser to isopropyl alcohol in the process of carrying out toluene rectifying, greatly improved the efficiency of solvent recovery.
Claims (2)
1. a hydroxypropyl cellulose solvent recovery unit, comprise precipitation still (1), it is characterized in that: described precipitation still (1) top outlet is connected with the entrance of condenser (2) by pipeline, the outlet of described condenser (2) is connected with the entrance of the first flux bath (31) and the second flux bath (32) by pipeline, described the first flux bath (31) and the outlet of the second flux bath (32) are connected with the entrance of heater (4) by pipeline, described heater (4) top is provided with rectifying column (5), the cut outlet of described rectifying column (5) connects storage tank (7) by the first condenser (61), the outlet at bottom of described storage tank (7) connects the first groove (81) and the second groove (82), the outlet of described storage tank (7) is connected with the return duct of rectifying column (5) by liquid level gauge (10), described storage tank (3) also connects emission-control equipment (9) by the second condenser (62).
2. a kind of hydroxypropyl cellulose solvent recovery unit as claimed in claim 1, is characterized in that: described condenser (2) adopts thin tubesheet structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449709.0U CN203400514U (en) | 2013-07-25 | 2013-07-25 | Hydroxy propyl cellulose solvent recycling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320449709.0U CN203400514U (en) | 2013-07-25 | 2013-07-25 | Hydroxy propyl cellulose solvent recycling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203400514U true CN203400514U (en) | 2014-01-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320449709.0U Expired - Fee Related CN203400514U (en) | 2013-07-25 | 2013-07-25 | Hydroxy propyl cellulose solvent recycling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203400514U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524243A (en) * | 2016-02-02 | 2016-04-27 | 上海华峰材料科技研究院（有限合伙） | Solvent removal method for waterborne polyurethane production process |
-
2013
- 2013-07-25 CN CN201320449709.0U patent/CN203400514U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105524243A (en) * | 2016-02-02 | 2016-04-27 | 上海华峰材料科技研究院（有限合伙） | Solvent removal method for waterborne polyurethane production process |
| CN105524243B (en) * | 2016-02-02 | 2018-08-31 | 上海华峰新材料研发科技有限公司 | The method that aqueous polyurethane production process removes solvent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20140725 |
|
| EXPY | Termination of patent right or utility model |