CN202322674U - System for removing formic acid generated in recovering process of dimethyl formamide - Google Patents
System for removing formic acid generated in recovering process of dimethyl formamide Download PDFInfo
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- CN202322674U CN202322674U CN2011204617464U CN201120461746U CN202322674U CN 202322674 U CN202322674 U CN 202322674U CN 2011204617464 U CN2011204617464 U CN 2011204617464U CN 201120461746 U CN201120461746 U CN 201120461746U CN 202322674 U CN202322674 U CN 202322674U
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Abstract
The utility model relates to a system for removing formic acid generated in the recovering process of dimethyl formamide, which comprises a recovering pot. The system for removing the formic acid generated in the recovering process of the dimethyl formamide is characterized in that a dimethyl formamide (DMF) concentrated liquor inlet, a first gas outlet, an alkali liquor inlet and a liquor waste residue outlet are arranged on the recovering pot, the alkali liquor inlet is connected with an alkali blending tank by a pipeline, the liquor waste residue outlet is connected with a liquor waste residue inlet of a drying machine, a dry residue outlet and a water vapor outlet are arranged on the drying machine, the water vapor outlet is connected with a water vapor separator, a second gas outlet and a liquor outlet are arranged on the water vapor separator, the liquor outlet is connected with the DMF concentrated liquor inlet of the recovering pot by a pipeline, the second gas outlet is connected with an inlet of a residue condenser by a pipeline, and an outlet of the residue condenser is connected with a condensate tank. According to the system for removing the formic acid generated in the recovering process of the dimethyl formamide, the problem that the normal execution of a recovering system is seriously influenced after the formic acid generated in the recovery of the DMF is accumulated to a certain extent once the formic acid cannot be completely decomposed and is remained in the system, or the index of the produced DMF exceeds a standard seriously is solved.
Description
Technical field
The utility model relates to a kind of system of removing formic acid, especially a kind of system of removing the formic acid that produces in the N removal process.
Background technology
In the middle of the rectifying in N (DMF) removal process; Can produce the formic acid of trace; In the general retrieving arrangement; The capital adopts the method for pyrolytic decomposition to remove formic acid, and concrete grammar is such: the DMF liquid concentrator at the bottom of the rectifying tower is heated by the extracting tower reboiler because of formic acid and the DMF mixing liquid that high temperature evaporation produces trace gets into the extracting tower bottom again; Evaporate by the orifice plate filler in the extracting tower by the extracting tower bottom, separate formic acid and DMF; Because of formic acid is heavy component, just accumulate at the bottom of the tower, DMF is that light component just rises in the tower by receiving charging tray to get into the discharging condensing surface; The spissated DMF that contains formic acid reclaims pot by the suction of formic acid pump at the bottom of the tower, is evaporated to the formic acid decomposition tower at the recovery pot through a stirring heating, and the formic acid decomposition tower is made up of wire packing, and the formic acid of rising is CO and H through pyrolytic decomposition
2O.But because in the actual production process, because the error of actually operating, the formic acid of generation often can not all decompose, remaining formic acid is accumulated to a certain degree, with the DMF that influence is reclaimed, formic acid content severe overweight.
Summary of the invention
The purpose of the utility model is to overcome the deficiency that exists in the prior art, and a kind of system of removing the formic acid that produces in the N removal process is provided, and removes remaining all formic acid, and with the waste residue oven dry that produces, is beneficial to the processing of waste.
The technical scheme that provides according to the utility model; The system of the formic acid that produces in the said removal N removal process comprises and reclaims pot, and characteristic is: said recovery pot is provided with the import of DMF liquid concentrator, first pneumatic outlet, alkali lye import and the outlet of liquid waste residue; The alkali lye import is connected with alkali-prepared tank through pipeline; The outlet of liquid waste residue is connected with the liquid waste residue import of drying machine, and drying machine is provided with dried slag outlet and steam outlet, and the steam outlet is connected with steam trap; Steam trap is provided with second pneumatic outlet and liquid exit; Liquid exit is connected with the DMF liquid concentrator import of reclaiming pot through pipeline, and second pneumatic outlet is connected with the import of residue condensing surface through pipeline, and the outlet of residue condensing surface is connected with condensate drum.
Connect cooling system on the said drying machine; Said cooling system comprises the thermal oil water cooler; The thermal oil water cooler is provided with first heat conductive oil inlet, the first thermal oil outlet, entrance of cooling water and cooling water outlet; First thermal oil outlet on the thermal oil water cooler is connected with the 3rd heat conductive oil inlet of drying machine, and the 3rd thermal oil outlet on the drying machine is connected with first heat conductive oil inlet.
The first heat conductive oil inlet place at said thermal oil water cooler is equipped with the thermal oil cooling pump.
Between said alkali lye import and alkali-prepared tank, install and join alkali pump.
Be connected with vacuum pump on the said condensate drum.
On said recovery pot top second heat conductive oil inlet is set, the outlet of second thermal oil is set in the bottom of reclaiming pot.
The utility model has the advantages that: solved during DMF reclaims, in a single day the formic acid of generation can not decompose fully, remains in the system, be accumulated to a certain degree after, badly influence normally carrying out of recovery system, perhaps the problem of the DMF index severe overweight of production department.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with concrete accompanying drawing the utility model is described further.
As shown in the figure: the system of removing the formic acid that produces in the N removal process comprises recovery pot 1; DMF liquid concentrator import 2; First pneumatic outlet 3; Alkali lye import 4; Liquid waste residue outlet 5; Alkali-prepared tank 6; Join alkali pump 7; Drying machine 8; Liquid waste residue import 9; Dried slag outlet 10; Steam outlet 11; Steam trap 12; Second pneumatic outlet 13; Liquid exit 14; Residue condensing surface 15; Condensate drum 16; Vacuum pump 17; Thermal oil water cooler 18; First heat conductive oil inlet 19; First thermal oil outlet 20; Entrance of cooling water 21; But water out 22; The 3rd heat conductive oil inlet 23; The 3rd thermal oil outlet 24; Thermal oil cooling pump 25; Second heat conductive oil inlet 26; Second thermal oil outlet 27 etc.
The utility model comprises recovery pot 1; Reclaim pot 1 and be provided with DMF liquid concentrator import 2, first pneumatic outlet 3, alkali lye import 4 and liquid waste residue outlet 5, alkali lye import 4 is connected with alkali-prepared tank 6 through pipeline, and alkali pump 7 is joined in installation between alkali lye import 4 and alkali-prepared tank 6; Liquid waste residue outlet 5 is connected with the liquid waste residue import 9 of drying machine 8; Drying machine 8 is provided with outlet 10 of dried slag and steam outlet 11, and steam outlet 11 is connected with steam trap 12, and steam trap 12 is provided with second pneumatic outlet 13 and the liquid exit 14; Liquid exit 14 is connected with the DMF liquid concentrator import 2 of reclaiming pot 1 through pipeline; Second pneumatic outlet 13 is connected with the import of residue condensing surface 15 through pipeline, and the outlet of residue condensing surface 15 is connected with condensate drum 16, is connected with vacuum pump 17 on the condensate drum 16;
Connect cooling system on the said drying machine 8; Said cooling system comprises thermal oil water cooler 18; Thermal oil water cooler 18 is provided with first heat conductive oil inlet 19, first thermal oil outlet 20, entrance of cooling water 21 and cooling water outlet 22; First thermal oil on the thermal oil water cooler 18 outlet 20 is connected with the 3rd heat conductive oil inlet 23 of drying machine 8, and the 3rd thermal oil on the drying machine 8 exports 24 and is connected with first heat conductive oil inlet 19;
First heat conductive oil inlet, 19 places at said thermal oil water cooler 18 are equipped with thermal oil cooling pump 25;
On said recovery pot 1 top second heat conductive oil inlet 26 is set, second thermal oil outlet 27 is set in the bottom of reclaiming pot 1.
The working process of the utility model: the utility model has increased an alkali-prepared tank 6 and a drying machine 8, and highly acid DMF gets into through DMF liquid concentrator import 2 and reclaims in the pot 1 at the bottom of the extracting tower, and 10% the NaOH solution for preparing in the alkali-prepared tank 6 is got into by alkali lye import 4 and reclaims in the pot 1 through joining alkali pump 7; After stirring under the highly basic condition, adding thermo-neutrality; The DMF gas that produces gets into second upgrading tower by first pneumatic outlet 3, and the liquid waste residue that neutralization reaction produces is discharged by liquid waste residue outlet 5, is sent in the drying machine 8 by liquid waste residue import 9 again; The liquid waste residue is in drying machine 8 behind the drying; Residue is discharged by dried slag outlet 10, and the gas that drying produces gets into steam trap 12 by steam outlet 11, and steam trap 12 isolated gases get into residue condensing surface 15; Liquid is got back to and is reclaimed pot 1; The liquid that 15 condensations of residue condensing surface are got off flows to condensate drum 16, and condensate drum 16 is vacuumized by a vacuum pump 17, and the DMF liquid in the condensate drum 16 flows to tundish; Get back to waste water tank once more, reclaim with waste water entering system more then.
Claims (6)
1. system of removing the formic acid that produces in the N removal process; Comprise and reclaim pot (1); It is characterized in that: said recovery pot (1) is provided with DMF liquid concentrator import (2), first pneumatic outlet (3), alkali lye import (4) and liquid waste residue outlet (5); Alkali lye import (4) is connected with alkali-prepared tank (6) through pipeline; Liquid waste residue outlet (5) is connected with the liquid waste residue import (9) of drying machine (8), and drying machine (8) is provided with dried slag outlet (10) and steam outlet (11), and steam outlet (11) is connected with steam trap (12); Steam trap (12) is provided with second pneumatic outlet (13) and liquid exit (14); Liquid exit (14) is connected with the DMF liquid concentrator import (2) of reclaiming pot (1) through pipeline, and second pneumatic outlet (13) is connected with the import of residue condensing surface (15) through pipeline, and the outlet of residue condensing surface (15) is connected with condensate drum (16).
2. the system of the formic acid that produces in the removal N removal process as claimed in claim 1; It is characterized in that: said drying machine (8) is gone up and is connected cooling system; Said cooling system comprises thermal oil water cooler (18); Thermal oil water cooler (18) is provided with first heat conductive oil inlet (19), the outlet of first thermal oil (20), entrance of cooling water (21) and cooling water outlet (22); First thermal oil outlet (20) on the thermal oil water cooler (18) is connected with the 3rd heat conductive oil inlet (23) of drying machine (8), and the 3rd thermal oil outlet (24) on the drying machine (8) is connected with first heat conductive oil inlet (19).
3. the system of the formic acid that produces in the removal N removal process as claimed in claim 2 is characterized in that: first heat conductive oil inlet (19) at said thermal oil water cooler (18) locates to be equipped with thermal oil cooling pump (25).
4. the system of the formic acid that produces in the removal N removal process as claimed in claim 1 is characterized in that: between said alkali lye import (4) and alkali-prepared tank (6), install and join alkali pump (7).
5. the system of the formic acid that produces in the removal N removal process as claimed in claim 1 is characterized in that: be connected with vacuum pump (17) on the said condensate drum (16).
6. the system of the formic acid that produces in the removal N removal process as claimed in claim 1; It is characterized in that: on said recovery pot (1) top second heat conductive oil inlet (26) is set, second thermal oil outlet (27) is set in the bottom of reclaiming pot (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204617464U CN202322674U (en) | 2011-11-19 | 2011-11-19 | System for removing formic acid generated in recovering process of dimethyl formamide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204617464U CN202322674U (en) | 2011-11-19 | 2011-11-19 | System for removing formic acid generated in recovering process of dimethyl formamide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202322674U true CN202322674U (en) | 2012-07-11 |
Family
ID=46434662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204617464U Withdrawn - After Issue CN202322674U (en) | 2011-11-19 | 2011-11-19 | System for removing formic acid generated in recovering process of dimethyl formamide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202322674U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408349A (en) * | 2011-11-19 | 2012-04-11 | 无锡双象超纤材料股份有限公司 | System for removing formic acid generated during dimethylformamide recovering process |
| CN106831471A (en) * | 2017-01-20 | 2017-06-13 | 福州大学 | A kind of method for removing a small amount of acid or glacial acetic acid and refining DMF |
-
2011
- 2011-11-19 CN CN2011204617464U patent/CN202322674U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408349A (en) * | 2011-11-19 | 2012-04-11 | 无锡双象超纤材料股份有限公司 | System for removing formic acid generated during dimethylformamide recovering process |
| CN102408349B (en) * | 2011-11-19 | 2014-07-02 | 无锡双象超纤材料股份有限公司 | System for removing formic acid generated during dimethylformamide recovering process |
| CN106831471A (en) * | 2017-01-20 | 2017-06-13 | 福州大学 | A kind of method for removing a small amount of acid or glacial acetic acid and refining DMF |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20140702 |
|
| RGAV | Abandon patent right to avoid regrant |