CN207512106U - The device of formic acid and DMF recovery systems are removed in DMF recovery systems - Google Patents
The device of formic acid and DMF recovery systems are removed in DMF recovery systems Download PDFInfo
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- CN207512106U CN207512106U CN201721245634.9U CN201721245634U CN207512106U CN 207512106 U CN207512106 U CN 207512106U CN 201721245634 U CN201721245634 U CN 201721245634U CN 207512106 U CN207512106 U CN 207512106U
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- formic acid
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Abstract
The utility model discloses the device of formic acid and DMF recovery systems are removed in a kind of DMF recovery systems.The device that formic acid is removed in the DMF recovery systems includes extracting tower, formic acid stripping tower, condenser and condensate drum, the feed inlet of the discharge port connection formic acid stripping tower of extracting tower, the feed inlet of the discharge port connection condenser of formic acid stripping tower, the feed inlet of the discharge port connection condensate drum of condenser, the recycling can in the discharge port connection external world of condensate drum, the reflux import of the neighbouring tower top of the bypass outlet connection formic acid stripping tower of condensate drum.The utility model removes DMF and decomposition formic acid by the way that formic acid is set to remove tower, can avoid using sodium hydroxide；Reflux import by the neighbouring tower top that the bypass outlet of condensate drum is connected to formic acid stripping tower, the reflux import of the DMF of a part of liquid and water from the neighbouring tower top of formic acid stripping tower in condensate drum is made to flow back to formic acid stripping tower, through counter current contacting so as to improve the quality of DMF finished products.
Description
Technical field
The utility model is related to the device of formic acid is removed in DMF recovery technologies field more particularly to a kind of DMF recovery systems
With DMF recovery systems.
Background technology
DMF is also known as n,N-Dimethylformamide, is a kind of excellent organic solvent, can dissolve the object of various structures
Matter is widely used in multiple industries such as pesticide, medicine, leather, weaving.Since DMF has excellent solubility property so that DMF
Dosage it is very big, while also cause to generate a large amount of DMF waste liquids, and since DMF is difficult to biological decomposition so that pass through rectifying and return
Receiving the DMF in waste liquid becomes the ideal method of processing DMF waste liquids.
During existing DMF uses, because production technology is formulated reason, majority is added with auxiliary agent, antifoaming agent, organic silicone oil
Deng being mostly acid substance, also fleuts such as toner, wood powder, calcium bicarbonate, also have be precipitated on a small quantity it is miscellaneous with cloth hair etc.
Matter is suspended in the substance in waste liquid, these solid contents further increase the acidity of waste liquid on above-mentioned acidic materials basis, and with
Liquid waste concentration improves the raising with temperature step by step, and DMF is decomposed and formic acid is caused to generate, and acid increase has the decomposition of DMF
Catalytic action, the decomposition rate of DMF are in exponential increase with the raising of formic acid concn.Formic acid recycles in recovery system can be to system
In metal material cause very big corrosion, particularly the components such as the filler of amino acid tower are generated with larger corrosion, if things go on like this,
It can influence the safety and service life of relevant device.
To reduce the influence of formic acid in DMF Mead-Bauer recovery systems, existing DMF devil liquor recoveries method of purification is in distilation
In the process, it is accumulated when high formic acid mixtures to after a certain amount of, adding in sodium hydroxide (NaOH) thereto and carries out acid-base neutralization, in
Mixture with after is back to DMF solution storage tank and is purified again again.
But there are following defects for above-mentioned DMF devil liquor recoveries method of purification：
(1) usage amount of sodium hydroxide can be bigger, and needs lasting use, and treatment cost of waste liquor is caused to increase.
(2) sodium hydroxide is that meeting vigorous reaction, Fast exothermic, material easily spray in a kind of highly basic, with formic acid N-process
Go out, personal safety is damaged, there is higher safety in production hidden danger.
(3) there are a certain amount of residual always for the substance after vicious circle, formic acid neutralization always in recovery system for formic acid
It stays, these substances recycle in system to impact the acid value of the DMF finished products of recycling, so as to cause being difficult to control
DMF finished product purity.
Utility model content
For overcome the deficiencies in the prior art, one of the purpose of this utility model is to provide in a kind of DMF recovery systems
The device of formic acid is removed, which can not only avoid using sodium hydroxide, reduce labor intensity and ensure production safety, and
The quality of DMF finished products can be improved.
The two of the purpose of this utility model are to provide a kind of DMF recovery systems of the device using above-mentioned removal formic acid.
One of the purpose of this utility model is realized using following technical scheme：
The device of formic acid is removed in a kind of DMF recovery systems, including extracting tower, formic acid stripping tower, condenser and condensate liquid
Tank, the discharge port of the extracting tower connect the feed inlet of the formic acid stripping tower, the discharge port connection institute of the formic acid stripping tower
The feed inlet of condenser is stated, the discharge port of the condenser connects the feed inlet of the condensate drum, and the condensate drum goes out
The extraneous recycling can of material mouth connection, the bypass outlet of the condensate drum connect the reflux of the neighbouring tower top of the formic acid stripping tower
Import.
In one embodiment, the discharge port of the formic acid stripping tower is located at tower top.
In one embodiment, the depickling tower reboiler for being heated to the extracting tower is further included.
In one embodiment, the stripping tower reboiler for being heated to formic acid stripping tower and connection are further included
The heat conducting oil boiler of the stripping tower reboiler.
In one embodiment, recycling pot and raffinate evaporation boiler is further included, the recycling pot and the raffinate evaporation boiler
Feed inlet connects the waste liquid discharge port of the formic acid stripping tower.
In one embodiment, waste drains pump is further included, the waste drains pump is located at the recycling pot and the raffinate evaporation boiler
The formic acid remove tower between and connect it is described recycling pot and the raffinate evaporation boiler feed inlet and the formic acid stripping tower
Waste liquid discharge port.
In one embodiment, depickling pump and reflux pump are further included, the depickling pump is located at the extracting tower and the first
Between acid stripping tower and the discharge port of the extracting tower and the feed inlet of formic acid stripping tower are connected, the reflux pump is located at institute
It states between condensate drum and formic acid stripping tower and connects the bypass outlet of the condensate drum and formic acid stripping tower
Flow back import.
The two of the purpose of this utility model are realized using following technical scheme：
A kind of DMF recovery systems, the DMF recovery systems include the device of the removal formic acid described in above-mentioned any one.
Compared with prior art, the beneficial effects of the utility model are：The utility model is shelled by the way that formic acid is set to remove tower
From DMF and formic acid is decomposed, can be avoided using sodium hydroxide, so as to reduce labor intensity and ensure production safety；By will be cold
The reflux import of the neighbouring tower top of the bypass outlet connection formic acid stripping tower of lime set tank, makes a part of liquid in condensate drum
The reflux import of DMF and water from the neighbouring tower top of formic acid stripping tower flows back to formic acid and removes tower, through counter current contacting so as to improve DMF into
The quality of product.
Description of the drawings
Fig. 1 is the structure diagram for the device that formic acid is removed in the DMF recovery systems of the utility model embodiment.
In figure：
11：Extracting tower 12：Depickling tower reboiler
13：Depickling pumps
21：Formic acid removes tower 22：Remove tower reboiler
23：Heat conducting oil boiler 24：Recycle pot
25：Raffinate evaporation boiler 26：Waste drains pump
31：Condenser
41：Condensate drum 42：Reflux pump
Specific embodiment
In the following, with reference to attached drawing and specific embodiment, the utility model is described further, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Fig. 1 is the structure diagram for the device that formic acid is removed in the DMF recovery systems of the utility model embodiment, with reference to figure
1, the device of the removal formic acid of the utility model embodiment includes extracting tower 11, formic acid stripping tower 21, condenser 31 and condensate liquid
Tank 41.
The DMF waste liquids containing formic acid in DMF recovery systems after rectifying column rectifying enter extracting tower 11, and extracting tower 11 is right
DMF and formic acid in DMF waste liquids are detached, wherein, DMF is as light component from 11 upper outlet of extracting tower, and formic acid is as weight
Component is stayed in the concentrate of 11 bottom of towe of extracting tower, and the concentration of the formic acid in DMF waste liquids after extracting tower 11 further improves.
Arrow in Fig. 1 represents the flow direction of material, the feed inlet of the discharge port connection formic acid stripping tower 21 of extracting tower 11, after concentration
DMF waste liquids enter formic acid stripping tower 21 from feed inlet of the discharge port of extracting tower 11 through pipeline and formic acid stripping tower 21.At one
In embodiment, the device for removing formic acid further includes depickling tower reboiler 12 for being heated to extracting tower 11, passes through depickling
The heating of tower reboiler 12 so that the part DMF in DMF waste liquids is isolated and improved the concentration of the formic acid in DMF waste liquids.
Formic acid stripping tower 21 is used to remove and to first the DMF in the DMF waste liquids after the concentration from extracting tower 11
Acid is decomposed, and formic acid decomposes generation water and carbon monoxide (CO), the discharge port connection condenser 31 of formic acid stripping tower 21 into
Material mouth, the DMF after stripping decomposes the water generated and carbon monoxide from the discharge hole for discharge of formic acid stripping tower 21 with formic acid, through pipeline
Enter condenser 31 with the feed inlet of condenser 31.
In one embodiment, the device for removing formic acid further includes to remove formic acid in the stripping tower that tower 21 is heated
The heat conducting oil boiler 23 of reboiler 22 and connection stripping tower reboiler 22.It can make the heat waste of system using conduction oil as heat medium
It loses and reduces, energy consumption reduces, and conduction oil temperature fluctuation is small, is conducive to system quiet run, while heat-conducting oil system is as normal pressure system
System, equipment are safer.
Optionally, the temperature of the bottom of towe of formic acid stripping tower 21 is 155 DEG C~165 DEG C, and the temperature of tower top is 145 DEG C~155
DEG C, on the one hand above-mentioned temperature can make DMF from liquid evaporation be gas, on the other hand can decompose formic acid, and ensure DMF's
Decomposition rate is far smaller than the decomposition rate of formic acid.In a specific embodiment, the temperature of the bottom of towe of formic acid stripping tower 21 is
160 DEG C, the temperature of tower top is 150 DEG C.
The condensed device 31 of DMF and water of gas phase, which is condensed, to be become liquid from gaseous state and stays in condenser 31, carbon monoxide row
Go out system, the feed inlet of the discharge port connection condensate drum 41 of condenser 31, the DMF and water of liquid are through pipeline and condensate drum 41
Feed inlet enter condensate drum 41.
The recycling can in the discharge port connection external world of condensate drum 41, the bypass outlet connection formic acid stripping tower of condensate drum 41
The reflux import of 21 neighbouring tower top, into the liquid of condensate drum 41 DMF and a water part by being entered by discharge port
Extraneous recycling can, the reflux import that another part removes tower 21 by bypass outlet, pipeline and formic acid enter formic acid stripping tower
21。
The heated rear stripping DMF of DMF waste liquids and decomposition formic acid, the DMF of gasification and decomposition in formic acid stripping tower 21 are generated
Water and carbon monoxide rise from bottom of towe to tower top, from formic acid stripping tower 21 reflux import flow into liquid DMF and water with
DMF, water and the carbon monoxide of gasification counter current contacting, multiple partial gasification and partial condensation in formic acid stripping tower 21, make DMF
Waste liquid is obtained adding and be efficiently separated, so as to improve the quality of DMF finished products.
In one embodiment, the discharge port of formic acid stripping tower 21 is located at tower top so that from the reflux of formic acid stripping tower 21
The DMF and water of the liquid that import flows into can be accessed adequately with DMF, water and the carbon monoxide of gasification in formic acid stripping tower 21
Counter current contacting makes the DMF in DMF waste liquids more fully be removed.
In one embodiment, the device for removing formic acid further includes recycling pot 24 and raffinate evaporation boiler 25, recycles 24 He of pot
The waste liquid discharge port of the feed inlet connection formic acid stripping tower 21 of raffinate evaporation boiler 25, formic acid stripping tower 21 remove DMF and decompose first
Waste liquid after acid enters recycling pot 24 and raffinate evaporation boiler 25, removes liquid therein, is discharged as residue.Optionally,
The device of removal formic acid further includes waste drains pump 26, and waste drains pump 26 is located at recycling pot 24 and raffinate evaporation boiler 25 and removes tower 21 with formic acid
Between and connect recycling pot 24 and raffinate evaporation boiler 25 feed inlet and formic acid stripping tower 21 waste liquid discharge port, pass through waste drains pump
26 and pipeline formic acid stripping tower 21 removed into DMF and decomposes the waste liquid after formic acid and is transported to recycling pot 24 and raffinate evaporation boiler 25.
In the present embodiment, the device for removing formic acid further includes two waste drains pumps 26, and in other embodiments, the number of waste drains pump 26 may be used also
To increase or decrease as needed.
In one embodiment, the device for removing formic acid further includes depickling pump 13 and reflux pump 42, and depickling pump 13 is located at de-
Acid tower 11 and formic acid stripping tower 21 between and connect extracting tower 11 discharge port and formic acid stripping tower 21 feed inlet, reflux pump 42
Positioned at condensate drum 41 and formic acid stripping tower 21 between and connect condensate drum 41 bypass outlet and formic acid stripping tower 21 return
Flow into mouth.DMF waste liquids after the concentration of extracting tower 11 are transported to the feed inlet of formic acid stripping tower 21, depickling by depickling pump 13
Pump 13 extracts the flows of DMF waste liquids as 150kg/H~200kg/H, by reflux pump 42 by a part of liquid in condensate drum 41
The DMF and water of state are transported to the reflux import of formic acid stripping tower 21.In the present embodiment, remove formic acid device further include two it is de-
Acid pump 13 and two reflux pumps 42, in other embodiments, the number of depickling pump 13 and two reflux pumps 42 can also be according to need
It increases or decreases.
On the other hand, the utility model provides a kind of DMF recovery systems, which includes above-mentioned removal first
The device of acid.
To sum up, the utility model removes DMF and decomposition formic acid by the way that formic acid is set to remove tower, can avoid using hydroxide
Sodium, so as to reduce labor intensity and ensure production safety；By the neighbour that the bypass outlet of condensate drum is connected to formic acid stripping tower
The reflux import of nearly tower top makes in condensate drum the DMF of a part of liquid and water from the reflux of the neighbouring tower top of formic acid stripping tower
Formic acid stripping tower is flowed back in import, through counter current contacting so as to improve the quality of DMF finished products.
It will be apparent to those skilled in the art that technical solution that can be as described above and design, make other various
Corresponding change and deformation, and all these changes and deformation should all belong to the protection of the utility model claims
Within the scope of.
Claims (8)
1. the device of formic acid is removed in a kind of DMF recovery systems, which is characterized in that including extracting tower, formic acid stripping tower, condenser
And condensate drum, the discharge port of the extracting tower connect the feed inlet of the formic acid stripping tower, the discharging of the formic acid stripping tower
Mouth connects the feed inlet of the condenser, and the discharge port of the condenser connects the feed inlet of the condensate drum, the condensation
The recycling can in the discharge port connection external world of flow container, the bypass outlet of the condensate drum connect the neighbouring tower of the formic acid stripping tower
The reflux import on top.
2. the device of removal formic acid as described in claim 1, which is characterized in that the discharge port of the formic acid stripping tower is located at tower
Top.
3. the device of removal formic acid as described in claim 1, which is characterized in that further include to add the extracting tower
The depickling tower reboiler of heat.
4. as described in claim 1 removal formic acid device, which is characterized in that further include for the formic acid remove tower into
The stripping tower reboiler of row heating and the heat conducting oil boiler for connecting the stripping tower reboiler.
5. the device of removal formic acid as described in claim 1, which is characterized in that further include recycling pot and raffinate evaporation boiler, institute
State the waste liquid discharge port that recycling pot connects the formic acid stripping tower with the feed inlet of the raffinate evaporation boiler.
6. the device of removal formic acid as claimed in claim 5, which is characterized in that further include waste drains pump, the waste drains pump is located at
It is described to recycle between pot and the raffinate evaporation boiler and formic acid stripping tower and connect the recycling pot and raffinate evaporation
The waste liquid discharge port of the feed inlet of pot and formic acid stripping tower.
7. the device of the removal formic acid as described in claim 1 to 6 any one, which is characterized in that further include depickling pump and return
Stream pump, the depickling pump are located between the extracting tower and formic acid stripping tower and connect discharge port and the institute of the extracting tower
The feed inlet of formic acid stripping tower is stated, the reflux pump is located between the condensate drum and formic acid stripping tower and described in connection
The reflux import of the bypass outlet of condensate drum and formic acid stripping tower.
8. a kind of DMF recovery systems, which is characterized in that the DMF recovery systems are included described in claim 1 to 7 any one
Removal formic acid device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245634.9U CN207512106U (en) | 2017-09-26 | 2017-09-26 | The device of formic acid and DMF recovery systems are removed in DMF recovery systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721245634.9U CN207512106U (en) | 2017-09-26 | 2017-09-26 | The device of formic acid and DMF recovery systems are removed in DMF recovery systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207512106U true CN207512106U (en) | 2018-06-19 |
Family
ID=62533963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721245634.9U Active CN207512106U (en) | 2017-09-26 | 2017-09-26 | The device of formic acid and DMF recovery systems are removed in DMF recovery systems |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207512106U (en) |
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2017
- 2017-09-26 CN CN201721245634.9U patent/CN207512106U/en active Active
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Address after: 215228 Da Xie village, Shengze Town, Wujiang District, Suzhou, Jiangsu Patentee after: Suzhou gigantic environmental protection Co., Ltd. Address before: 215000 Daxie Industrial Park, Luoqi Road, Daxie Village, Shengze Town, Wujiang District, Suzhou City, Jiangsu Province Patentee before: SUZHOU JULIAN ENVIRONMENTAL RESEARCH CO., LTD. |