CN202942672U - DMF (Dimethyl Formamide) recovering device in production of synthetic leather - Google Patents
DMF (Dimethyl Formamide) recovering device in production of synthetic leather Download PDFInfo
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- CN202942672U CN202942672U CN 201220647484 CN201220647484U CN202942672U CN 202942672 U CN202942672 U CN 202942672U CN 201220647484 CN201220647484 CN 201220647484 CN 201220647484 U CN201220647484 U CN 201220647484U CN 202942672 U CN202942672 U CN 202942672U
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- tower
- gas
- dmf
- reboiler
- synthetic leather
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Abstract
The utility model discloses a DMF (Dimethyl Formamide) recovering device in production of synthetic leather. The DMF recovering device comprises a primary concentration tower, a secondary concentration tower, a rectification tower and a deacidification tower, wherein the four towers are respectively and additionally provided with a reboiler; a gas outlet of the rectification tower is connected with the reboiler of the secondary concentration tower through a pipeline; a gas outlet of the secondary concentration tower is connected with the reboiler of the primary concentration tower through a pipeline; the rectification tower is connected with a feed device; the feed device comprises a gas-liquid separator arranged on the rectification tower, a flash evaporation tank connected with the gas-liquid separator, and a feed heater connected with the flash evaporation tank; and a discharge outlet of the secondary concentration tower is connected with the flash evaporation tank through a discharge pump. When the rectification tower can perform gas-liquid separation by the gas-liquid separator during the feeding, so that the quantity of liquid drops carried in ascending gas and the amount of gas carried in descending liquid are greatly reduced, the recovery efficiency of DMF is improved, the recovery is thorough, simultaneously, the production cost of the synthetic leather can be lowered and a good economic benefit is brought for an enterprise.
Description
Technical field
The utility model relates to the synthetic leather production technical field, the DMF retracting device during particularly a kind of synthetic leather is produced.
Background technology
at present, DMF retracting device in existing synthetic leather production has generally comprised primary concentrating tower, secondary concentrating tower, rectifying column and extracting tower, four towers have all been set up a reboiler, this rectifying tower ejects gas port and is connected in the reboiler of secondary concentrating tower by pipeline, this secondary concentrating tower tower top gas outlet is connected in the primary concentrating tower reboiler by pipeline, the discharging opening of this primary concentrating tower is connected in the reboiler of secondary concentrating tower by pipeline, the discharging opening of this secondary concentrating tower is connected in the reboiler of rectifying column by pipeline, the discharging opening of this rectifying column is connected in the reboiler of extracting tower by pipeline, the retracting device of this kind structure is when rectifying, its charging directly enters reboiler and without gas-liquid separation, carried a large amount of drops in the gas that rises, also carried a large amount of gas in the liquid that descends, the DMF rate of recovery is low, reclaim not thorough, also improved simultaneously the production cost of synthetic leather.
The utility model content
Main purpose of the present utility model is the shortcoming that overcomes prior art, the DMF retracting device during the synthetic leather that provide a kind of DMF of raising rate of recovery, reduces production costs is produced.
The utility model adopts following technical scheme:
DMF retracting device during a kind of synthetic leather is produced, include primary concentrating tower, secondary concentrating tower, rectifying column and extracting tower, four towers have all been set up a reboiler, this rectifying tower ejects gas port and is connected in the reboiler of secondary concentrating tower by pipeline, this secondary concentrating tower tower top gas outlet is connected in the reboiler of primary concentrating tower by pipeline, this rectifying column is connected with feed arrangement, this feed arrangement includes a gas-liquid separator that is installed on rectifying column, one flash tank and that is connected in gas-liquid separator is connected in the feed heater of flash tank, the discharging opening of this secondary concentrating tower is connected in this flash tank by discharging pump.
The discharging opening of described primary concentrating tower is connected in the charging aperture of secondary concentrating tower by discharging pump.
The discharging opening of described rectifying column is connected in the charging aperture of extracting tower by discharging pump.
By above-mentioned to description of the present utility model as can be known, compared with prior art, the beneficial effects of the utility model are: by the material introducing rectifying column of feed arrangement with the secondary concentrating tower bottom, carry out gas-liquid separation by gas-liquid separator when charging, greatly reduced the gas flow that carries in the liquid of the drop that carries in the gas that rises and decline, improved the rate of recovery of DMF, reclaimed more thoroughly, can reduce simultaneously the production cost of synthetic leather, for enterprise brings better economic benefit.
Description of drawings
Fig. 1 is the overall structure schematic diagram of the utility model specific embodiment.
In figure: 1. primary concentrating tower, 2. secondary concentrating tower, 3. rectifying column, 4. extracting tower, 5. reboiler, 6. gas-liquid separator, 7. flash tank, 8. feed heater, 9. discharging pump.
The specific embodiment
Below the utility model will be further described by the specific embodiment.
with reference to Fig. 1, DMF retracting device during a kind of synthetic leather of the present utility model is produced, include primary concentrating tower 1, secondary concentrating tower 2, rectifying column 3 and extracting tower 4, four towers have all been set up a reboiler 5, this rectifying column 3 tower top gas outlets are connected in the reboiler 5 of secondary concentrating tower 2 by pipeline, this secondary concentrating tower tower 2 ejects gas port and is connected in the reboiler 5 of primary concentrating tower 1 by pipeline, this rectifying column 3 is connected with feed arrangement, this feed arrangement includes a gas-liquid separator 6 that is installed on rectifying column 3, one flash tank 7 and that is connected in gas-liquid separator 6 is connected in the feed heater 8 of flash tank 7, the discharging opening of this secondary concentrating tower 2 is connected in this flash tank 7 by discharging pump 9, the discharging opening of this primary concentrating tower 1 is connected in the charging aperture of secondary concentrating tower 2 by discharging pump 9, the discharging opening of this rectifying column 3 is connected in the charging aperture of extracting tower 4 by discharging pump 9.
With reference to Fig. 1, use the utility model to reclaim DMF and comprise the following steps:
The waste water that 1. will contain DMF is introduced primary concentrating tower 1, and to carry out negative pressure concentrated, and the water vapour of secondary concentrating tower 2 tower tops is introduced the reboiler 5 of primary concentrating tower 1 as thermal source;
2. again carry out negative pressure in the material introducing secondary concentrating tower 2 with primary concentrating tower 1 bottom concentrated, and the water vapour of rectifying column 3 tower tops is introduced the reboiler 5 of secondary concentrating tower 2 as thermal source;
3. the material of secondary concentrating tower 2 bottoms is introduced by feed arrangement and carried out rectifying in rectifying column 3, and conduction oil is introduced the reboiler 5 of feed heater 8 and rectifying column 3 as thermal source, during charging, material is introduced in flash tank 7, heat by the material in 8 pairs of flash tanks of feed heater 7, then enter rectifying column 3 by gas-liquid separator 6, carry out gas-liquid separation in the time of charging, after rectifying, rectifying column 3 bottoms can obtain the mixture of DMF and a small amount of formic acid;
4. the material of rectifying column 3 bottoms is introduced in extracting tower 4 and carried out the negative pressure depickling, and the reboiler 5 that conduction oil is introduced extracting tower 4 is as thermal source, after depickling, the DMF that extracting tower 4 tops can obtain to make with extra care.
Above-mentioned is only a specific embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection domain.
Claims (3)
1. the DMF retracting device during a synthetic leather is produced, include primary concentrating tower, secondary concentrating tower, rectifying column and extracting tower, four towers have all been set up a reboiler, this rectifying tower ejects gas port and is connected in the reboiler of secondary concentrating tower by pipeline, this secondary concentrating tower tower top gas outlet is connected in the reboiler of primary concentrating tower by pipeline, it is characterized in that: this rectifying column is connected with feed arrangement, this feed arrangement includes a gas-liquid separator that is installed on rectifying column, one flash tank and that is connected in gas-liquid separator is connected in the feed heater of flash tank, the discharging opening of this secondary concentrating tower is connected in this flash tank by discharging pump.
2. the DMF retracting device during a kind of synthetic leather as claimed in claim 1 is produced, it is characterized in that: the discharging opening of described primary concentrating tower is connected in the charging aperture of secondary concentrating tower by discharging pump.
3. the DMF retracting device during a kind of synthetic leather as claimed in claim 1 is produced, it is characterized in that: the discharging opening of described rectifying column is connected in the charging aperture of extracting tower by discharging pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647484 CN202942672U (en) | 2012-11-29 | 2012-11-29 | DMF (Dimethyl Formamide) recovering device in production of synthetic leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220647484 CN202942672U (en) | 2012-11-29 | 2012-11-29 | DMF (Dimethyl Formamide) recovering device in production of synthetic leather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202942672U true CN202942672U (en) | 2013-05-22 |
Family
ID=48418388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220647484 Expired - Fee Related CN202942672U (en) | 2012-11-29 | 2012-11-29 | DMF (Dimethyl Formamide) recovering device in production of synthetic leather |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202942672U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964262A (en) * | 2012-11-29 | 2013-03-13 | 泉州万华世旺超纤有限责任公司 | DMF (dimethyl formamide) recovery device and method in production of synthetic leather |
-
2012
- 2012-11-29 CN CN 201220647484 patent/CN202942672U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102964262A (en) * | 2012-11-29 | 2013-03-13 | 泉州万华世旺超纤有限责任公司 | DMF (dimethyl formamide) recovery device and method in production of synthetic leather |
| CN102964262B (en) * | 2012-11-29 | 2016-05-11 | 泉州万华世旺超纤有限责任公司 | DMF recovery method in a kind of synthetic leather production |
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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: 20130522 Termination date: 20181129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |