CN207537375U - A kind of cyanoacetic acid isolates and purifies device - Google Patents
A kind of cyanoacetic acid isolates and purifies device Download PDFInfo
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- CN207537375U CN207537375U CN201721422567.3U CN201721422567U CN207537375U CN 207537375 U CN207537375 U CN 207537375U CN 201721422567 U CN201721422567 U CN 201721422567U CN 207537375 U CN207537375 U CN 207537375U
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Abstract
A kind of cyanoacetic acid isolates and purifies device, including material processing device and crude product refining device；In material processing device, the first dehydrating tower tower reactor connects the second dehydrating tower, and the second dehydrating tower tower reactor connection third dehydrating tower is equipped with reboiler in the tower reactor of the first dehydrating tower, the second dehydrating tower, third dehydrating tower；Third dehydrating tower tower reactor is also connected with desalter, and desalter is connected to the first treating column；The first treating column tower reactor in crude product refining device is equipped with the first refined tower reboiler and desalter.The utility model many places make full use of energy, low energy consumption using the coupling of hot steam and reboiler；It is refined using triple effect dehydration and single-action or economic benefits and social benefits, cyanoacetic acid content is low in the water isolated.
Description
Technical field
Device is isolated and purified the utility model is related to a kind of cyanoacetic acid, belongs to substance separation technology field.
Background technology
Cyanoacetic acid is using monoxone, sodium carbonate, Cymag as raw material, and neutralized, cyaniding, hydrochloric acid are acidified and obtain.Wherein water
Point content and salt content are higher, and when use needs to be further purified.Since cyanoacetic acid concentration is low in cyanoacetic acid mixed solution, water
It is high with the content of salt, therefore concentration process need to consume a large amount of steam, and after evaporation the phase be largely precipitated because of sodium chloride, conduct heat
Difference easily decomposes cyanoacetic acid.
CN201110275737.0 discloses a kind of method of preparing cyanoacetic acid through continuous dehydration, removes during the dehydration process not
The disconnected sodium chloride being precipitated prepares the cyanoacetic acid, prepares cyanoacetic acid with multiple-effect evaporation, not only reduces steam consumption, and each effect
Sodium chloride is all filtered during progress, sodium chloride, cyanoacetic acid high income is removed in time, but is disadvantageous in that.
CN200810052135.7 discloses a kind of preparation method of high purity solid cyanoacetic acid, with esters solvent to obtaining
To cyanoacetic acid and the mixture of sodium chloride extracted, extract liquor reduction vaporization is concentrated to give high-purity solid cyanoacetic acid.But
Organic solvent amount used is big, and (ratio of solvent and mixed liquor is 1-5:1), extraction times 4-8 times, it is cumbersome, of high cost.
CN201510810110.9 discloses the preparation method of a kind of cyanoacetic acid and its derivative, by obtained cyanoacetic acid and
The mixed solution of sodium chloride is separated into cyanoacetic acid solution and sodium chloride solution with continuous chromatography, avoids traditional distillation and concentration point
The shortcomings that cyanoacetic acid from caused by largely decomposes, yield is low, but it is only suitable for small-scale production.
Utility model content
The utility model is in view of the deficienciess of the prior art, provide a kind of cyanoacetic acid isolates and purifies device.
The technical solution that the utility model solves above-mentioned technical problem is as follows：A kind of cyanoacetic acid isolates and purifies device, packet
Include material processing device and crude product refining device：
The material processing device includes the first dehydrating tower, the second dehydrating tower, third dehydrating tower, the first dehydrating tower tower
Kettle connects the second dehydrating tower, and the second dehydrating tower tower reactor connection third dehydrating tower takes off in the first dehydrating tower, the second dehydrating tower, third
The tower reactor of water tower is respectively equipped with the first dehydration column reboiler, the second dehydration column reboiler, third dehydration column reboiler；The third
Dehydrating tower tower reactor is also connected with desalter, and the desalter is connected to the first treating column；
The crude product refining device include the first treating column, the first treating column tower reactor be equipped with the first refined tower reboiler and
Desalter.
The beneficial effects of the utility model are：After the dehydration of triple effect dehydrating tower and desalting processing, content can be obtained and existed
More than 70% cyanoacetic acid solution after single-action treating column refines, obtains the cyanoacetic acid solution of more than %, and salt content is small
In %.
Based on the above technical solution, the utility model can also do following improvement.
The crude product refining device further includes the second treating column, and second treating column connects the first treating column tower reactor, the
Two treating column tower reactors are equipped with the second refined tower reboiler and desalter.Economic benefits and social benefits treating column can more thoroughly slough moisture and not improve
The purity of cyanoacetic acid obtains the cyanoacetic acid solution of more than %.
Further, desalter is equipped at the first dehydrating tower tower reactor and the second dehydrating tower tower reactor at least one.
Further, the feed inlet of first dehydrating tower is equipped with feed preheater, and the third dehydration column overhead is equipped with the
Three dehydration column overhead heat exchangers, the feed preheater are connected with third dehydration column overhead heat exchanger；Raw material is first dehydrated through third
After the heat exchange of column overhead heat exchanger, then enter the first dehydrating tower after feed preheater preheats.The heat of hot steam is fully utilized,
The usage amount of steam is saved, reduces energy consumption.
Further, first dehydration column overhead is equipped with the first return tank, and first return tank connects the second dehydrating tower
The refrigerant exit of reboiler, the heating agent entrance of the second dehydration column reboiler connect the first dehydrating tower；Second dehydration column overhead
Equipped with the second return tank, the refrigerant exit of the second return tank connection third dehydration column reboiler, third dehydration column reboiler
Heating agent entrance connect the second dehydrating tower.Heat source of the first dehydration column overhead hot steam as the second dehydration column reboiler, second
Heat source of the dehydration column overhead hot steam as third dehydration column reboiler.The heat of device in itself is efficiently utilized, and is reduced
The loss of recirculated water reduces energy consumption and reduces discharge, energy conservation and environmental protection.
Further, the described second refined column overhead is equipped with the second treating column return tank, and the second treating column return tank connects
The refrigerant exit of logical first refined tower reboiler, the heating agent entrance of the first refined tower reboiler connect the second treating column.
Further, the third dehydration column overhead is equipped with third return tank, third dehydration column overhead connection third return tank
Bottom liquid outlet, the inlet connection third dehydration column overhead heat exchanger of third return tank, the third dehydration column overhead changes
Hot device connects third dehydration column overhead condenser, third dehydration column overhead condenser connection third dehydrating tower.
Further, the described first refined column overhead is equipped with the first treating column return tank, the first refined column overhead connection first
The bottom liquid outlet for the treatment of column return tank, inlet the first treating column overhead condenser of connection of the first return tank, described first
Treating column overhead condenser connects the first treating column.
Further, vacuum trap is equipped on first return tank and the second return tank, second treating column returns
It flows tank and is equipped with vacuum trap.The fixed gas of each return tank is discharged after the condensation of vacuum trap through vacuum system.
Further, the desalter includes cooling device, crystallization apparatus or further includes centrifuge or drying machine etc.,
It is subject to and realizes desalination purpose.
In conclusion the beneficial effects of the utility model are, (1) makes full use of energy, and low energy consumption, for example many places utilize heat
The coupling of steam and reboiler；The recycling of hot steam, with greatly reducing hot steam consumption；(2) it is dehydrated using triple effect
It is refined with single-action, cyanoacetic acid content is low in the water isolated.
Description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment；
Fig. 2 is the structure diagram of the utility model embodiment；
Fig. 3 is the structure diagram of the utility model embodiment；
Fig. 4 is the structure diagram of the utility model embodiment；
Fig. 5 is the structure diagram of the utility model embodiment.
Wherein, the 1, first dehydrating tower；2nd, the second dehydrating tower；3rd, third dehydrating tower；4th, the first treating column；5th, second is refined
Tower；6th, feed preheater；7th, the first dehydration column reboiler；8th, the second dehydration column reboiler；9th, third dehydration column reboiler；10、
First refined tower reboiler；11st, the second refined tower reboiler；12nd, the first return tank；13rd, the second return tank；14th, third flows back
Tank；15th, the first treating column return tank；16th, the second treating column return tank；17th, third dehydration column overhead heat exchanger；18th, third takes off
Water tower overhead condenser；19th, the first treating column overhead condenser；20th, vacuum trap；21st, desalter；22nd, mother liquor buffers
Tank.
Specific embodiment
The principle and feature of the utility model are described below in conjunction with attached drawing, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
Embodiment 1
A kind of cyanoacetic acid isolates and purifies device, including material processing device and crude product refining device；Material processing device
Including the first dehydrating tower 1, the second dehydrating tower 2, third dehydrating tower 3,1 tower reactor of the first dehydrating tower connects the second dehydrating tower 2, the
Two dehydrating towers, 2 tower reactor connection third dehydrating tower 3, distinguishes in the tower reactor of the first dehydrating tower 1, the second dehydrating tower 2, third dehydrating tower 3
Equipped with the first dehydration column reboiler 7, the second dehydration column reboiler 8, third dehydration column reboiler 9；3 tower reactor of third dehydrating tower also connects
Then desalter 21, desalter 21 are connected to the first treating column 4；Crude product refining device includes the first treating column 4, first
4 tower reactor for the treatment of column is equipped with the first refined tower reboiler 10 and desalter 21.
Embodiment 2
As shown in Fig. 2, on the basis of embodiment 1, the feed inlet of the first dehydrating tower 1 is equipped with feed preheater 6, and third takes off
3 tower top of water tower is equipped with third dehydration column overhead heat exchanger 17, and feed preheater 6 is connected with third dehydration column overhead heat exchanger 17；
Raw material is first after the heat exchange of third dehydration column overhead heat exchanger 17, then enter the first dehydrating tower 1 after the preheating of feed preheater 6.Separately
Outside, in order to preferably remove salinity, desalter 21 is equipped in 1 tower reactor tower reactor of the first dehydrating tower.
Embodiment 3
As shown in figure 3, on the basis of embodiment 2, desalter 21 is equipped in 2 tower reactor tower reactor of the second dehydrating tower.In addition,
Solution can be introduced into mother liquor surge tank 22 as buffering after desalting processings 21 at different levels, enter back into next stage processing unit.
Embodiment 4
As shown in figure 4, again on the basis of embodiment 1, the feed inlet of the first dehydrating tower 1 is equipped with feed preheater 6, and third takes off
3 tower top of water tower is equipped with third dehydration column overhead heat exchanger 17, and feed preheater 6 is connected with third dehydration column overhead heat exchanger 17；
In addition, crude product refining device further includes the second treating column 5, the second treating column 5 connection 4 tower reactor of the first treating column, the second treating column 5
Tower reactor is equipped with the second refined tower reboiler 11 and desalter 21.Solution can be introduced into mother liquor and delay after desalting processings at different levels
Tank 22 is rushed as buffering, enters back into next stage processing unit.
Embodiment 5
As shown in figure 5, again on the basis of embodiment 4, it is equipped in 1 tower reactor of the first dehydrating tower and 2 tower reactor of the second dehydrating tower
Desalter 21.
The foregoing is merely the various feasible embodiments of the utility model, are not intended to limit the utility model, in addition
Also there is the feasible scheme of many various device combinations, within the spirit and principle of the utility model, that is made is any
Modification, equivalent replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of cyanoacetic acid isolates and purifies device, which is characterized in that including material processing device and crude product refining device：
The material processing device includes the first dehydrating tower, the second dehydrating tower, third dehydrating tower, and the first dehydrating tower tower reactor connects
Logical second dehydrating tower, the second dehydrating tower tower reactor connection third dehydrating tower, in the first dehydrating tower, the second dehydrating tower, third dehydrating tower
Tower reactor be respectively equipped with the first dehydration column reboiler, the second dehydration column reboiler, third dehydration column reboiler；The third dehydration
Tower tower reactor is also connected with desalter, and the desalter is connected to the first treating column；
The crude product refining device includes the first treating column, and the first refined tower reboiler and desalination are equipped in the first treating column tower reactor
Device.
2. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：The crude product refining device also wraps
The second treating column is included, second treating column connects the first treating column tower reactor, and the second treating column tower reactor is equipped with the second treating column again
Boil device and desalter.
3. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：In the first dehydrating tower tower reactor
With at the second dehydrating tower tower reactor at least one be equipped with desalter.
4. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：The charging of first dehydrating tower
Mouthful be equipped with feed preheater, the third dehydration column overhead be equipped with third dehydration column overhead heat exchanger, the feed preheater with
Third dehydration column overhead heat exchanger connects；Raw material is first after the heat exchange of third dehydration column overhead heat exchanger, then pre- through feed preheater
Enter the first dehydrating tower after heat.
5. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：First dehydration column overhead is set
There is the first return tank, first return tank connects the refrigerant exit of the second dehydration column reboiler, the second dehydration column reboiler
Heating agent entrance connects the first dehydrating tower；Second dehydration column overhead is equipped with the second return tank, second return tank connection the
The refrigerant exit of three dehydration column reboilers, the heating agent entrance of third dehydration column reboiler connect the second dehydrating tower.
6. cyanoacetic acid according to claim 2 isolates and purifies device, it is characterised in that：The second refined column overhead is set
There is the second treating column return tank, the second treating column return tank connects the refrigerant exit of the first refined tower reboiler, the first essence
The heating agent entrance of tower reboiler processed connects the second treating column.
7. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：The third dehydration column overhead is set
There is third return tank, third dehydration column overhead connects the bottom liquid outlet of third return tank, the inlet connection of third return tank
Third dehydration column overhead heat exchanger, the third dehydration column overhead heat exchanger connect third dehydration column overhead condenser, and third takes off
Water tower overhead condenser connects third dehydrating tower.
8. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：The first refined column overhead is set
There is the first treating column return tank, the first refined column overhead connects the bottom liquid outlet of the first treating column return tank, the first return tank
Inlet connect the first treating column overhead condenser, the first treating column overhead condenser connects the first treating column.
9. cyanoacetic acid according to claim 5 isolates and purifies device, it is characterised in that：First return tank and second
Vacuum trap is equipped on return tank.
10. cyanoacetic acid according to claim 1 isolates and purifies device, it is characterised in that：The desalter includes cold
But device, crystallization apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422567.3U CN207537375U (en) | 2017-10-30 | 2017-10-30 | A kind of cyanoacetic acid isolates and purifies device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721422567.3U CN207537375U (en) | 2017-10-30 | 2017-10-30 | A kind of cyanoacetic acid isolates and purifies device |
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| CN207537375U true CN207537375U (en) | 2018-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111792685A (en) * | 2020-06-16 | 2020-10-20 | 山东中盛药化设备有限公司 | System and method for continuously recovering NMP from NMP wastewater |
-
2017
- 2017-10-30 CN CN201721422567.3U patent/CN207537375U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111792685A (en) * | 2020-06-16 | 2020-10-20 | 山东中盛药化设备有限公司 | System and method for continuously recovering NMP from NMP wastewater |
| CN111792685B (en) * | 2020-06-16 | 2023-04-28 | 山东中盛药化设备有限公司 | System and method for continuously recycling NMP from NMP wastewater |
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