CN208632418U - A kind of equipment of rectifying polymethoxy dimethyl ether - Google Patents
A kind of equipment of rectifying polymethoxy dimethyl ether Download PDFInfo
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- CN208632418U CN208632418U CN201820716910.3U CN201820716910U CN208632418U CN 208632418 U CN208632418 U CN 208632418U CN 201820716910 U CN201820716910 U CN 201820716910U CN 208632418 U CN208632418 U CN 208632418U
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- rectifying
- return tank
- dimethyl ether
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- polymethoxy dimethyl
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Abstract
The utility model relates to a kind of equipment of rectifying polymethoxy dimethyl ether, comprising: rectifying column is provided with the top of the distillation column outlet；And return tank, it is provided with return tank upper entrance and temperature regulating device, wherein the top of the distillation column outlet is connected with the warm pipeline of return tank upper entrance, wherein the temperature regulating device is used to control the temperature of the return tank at 30 to 50 DEG C.The utility model is by changing vapor condensation process, rectifying tower top gaseous phase is set to distillate component by keeping the temperature good pipeline, to guarantee that the gas phase distillated does not condense, but directly by liquid phase scrubbing, so that the concentration of formaldehyde molecule paraformaldehyde generated in the liquid phase is relatively low, it is not easy to plug condensation pipe.
Description
Technical field
The utility model relates to polymethoxy dimethyl ether technical field of rectification, and specifically, the utility model relates to a kind of essences
Evaporate the equipment of polymethoxy dimethyl ether.
Background technique
Polymethoxy dimethyl ether (DMMn, n=3-8) general structure be CH3O(CH2O)nCH3, it is a kind of Novel clean oil product
Additive and blend component.DMMnAs cleaning diesel oil blending component, Cetane number is up to 76, and no sulphur is without aromatic hydrocarbons, energy and diesel oil
Fraction arbitrary proportion is miscible, can not only improve the combustion position of diesel engine, and can substantially reduce exhaust pollutant row
It puts, has broad application prospects.Also, DMMnAs environmentally friendly solvent alternative compositions, there is excellent solubility property, with other
It is dilute to can be widely used for standby rubber system, metal cleaning, adhesive preparation, printing and dyeing assistant preparation and paint for Conventional solvents compounding
Release the various fields such as agent preparation.
DMMnMainly using methanol, dimethoxym ethane and/or dimethyl ether and formaldehyde and/or paraformaldehyde as raw material, in acid catalysis
It is prepared in the presence of agent and dehydrating agent.In DMMnIn production process, mixture obtained include dimethoxym ethane, metaformaldehyde, formaldehyde,
DMM2、DMM3-8Etc. mixed components, light components therein are removed by rectifying column, the light components of gas phase are discharged from tower top,
However, polymerization easily occurs due to condensation for light components formaldehyde during discharge forms poly, thus Severe blockage
Overhead condensation cooler.
Utility model content
[technical problem]
The equipment that one of the utility model is designed to provide a kind of rectifying polymethoxy dimethyl ether.
[technical solution]
To solve the above-mentioned problems, the utility model provides a kind of equipment of rectifying polymethoxy dimethyl ether, comprising: essence
Tower is evaporated, is provided with and distillates the tower top outlet of component and outlet at bottom for exporting rectifying product for gas phase to be discharged；And
Return tank, is provided with the return tank top first entrance that component is distillated for importing gas phase, and for by the temperature of return tank
Control the temperature regulating device at 30 to 50 DEG C, wherein the top of the distillation column outlet passes through utilidor and the return tank top
First entrance is connected.
[technical effect]
The process mode of existing rectification process is that the gas phase of the top of the distillation column is distillated to component to first pass through cooler condensation again
Into the process of condensate liquid collecting tank, wherein polymerization easily occurs due to condensation and forms polymer for formaldehyde, thus Severe blockage
Overhead condensation cooler.The utility model makes top gaseous phase distillate component good by heat preservation by changing vapor condensation process
Pipeline, to guarantee that the gas phase that distillates does not condense, but directly by liquid phase scrubbing, so that formaldehyde molecule poly generated
The concentration of formaldehyde in the liquid phase is relatively low, is not easy to plug condensation pipe.
Detailed description of the invention
Fig. 1 is to show the device of the rectifying polymethoxy dimethyl ether of an embodiment according to the present utility model.
[appended drawing reference]
1 rectifying column；2 reboilers；3 return tanks；4 heat exchangers；5 cooling pumps；6 reflux pumps；7 tower bottom extraction pump.
Specific embodiment
Hereinafter, the utility model will be described in further detail.
The utility model provides a kind of equipment of rectifying polymethoxy dimethyl ether, comprising:
Rectifying column is provided with and distillates the tower top outlet of component and bottom for exporting rectifying product for gas phase to be discharged
Outlet；And
Return tank is provided with the return tank top first entrance that component is distillated for importing gas phase, and for that will flow back
Temperature regulating device of the temperature control of tank at 30 to 50 DEG C,
Wherein, the top of the distillation column outlet is connected by utilidor with return tank top first entrance.
In the equipment of the utility model, the temperature regulating device is not limited particularly, as long as it can be by the return tank
Temperature control at 30 to 50 DEG C.For example, the temperature regulating device can be set in return tank outside or inside, for example, set
The heat exchanger in outside or inside is set, inside or the heating or cooling device etc. around return tank setting are set, but are not limited to
This.
In the present invention, the temperature of the return tank refers to the temperature of the absorbing liquid in the return tank.
The utilidor can be kept the temperature using attemperator.Wherein, the attemperator is not limited particularly
It is fixed, as long as can achieve the effect that keep temperature, for example, thermal insulation material, heating device, heat exchange sleeve etc. can be used,
But not limited to this.
In one embodiment, in equipment according to the present utility model, the temperature regulating device is that external change is arranged in
Hot device.At this point, the return tank is also provided with return tank top entry and return tank outlet at bottom, it is respectively connected to described
The entrance of heat exchanger constitutes circulation loop to control the temperature of return tank.
In one embodiment, the return tank is also provided with return tank lower part outlet, and the rectifying column is also set
It is equipped with rectifier entrance, the return tank lower part outlet is connected with the rectifier entrance, and being used for will be in return tank
A part of absorbing liquid be back in the rectifying column of polymethoxy dimethyl ether.In addition, the return tank lower part outlet can be with
It is connected to the entrance of polymethoxy dimethyl ether reactor, for a part in the absorbing liquid in the return tank to be back to life
In the reactor for producing polymethoxy dimethyl ether.
The number of plates of the rectifying column can be 10 to 20, preferably 15.
In one embodiment, equipment according to the present utility model further includes the reboiler being arranged in outside rectifying column.
At this point, the rectifying column is also provided with: rectifying column centre entrance, for introducing the polymethoxy dimethyl ether to rectifying, and
Rectifying column lower entrances.The outlet at bottom and rectifying column lower entrances of the rectifying column are connected with reboiler, follow for constituting
Loop back path, to maintain the rectification temperature in rectifying column.
It can also as needed include that well known to a person skilled in the art valve, pump, streams in the equipment of the utility model
The common element such as meter, pressure gauge, conduit, purposes and effect with it is in the prior art identical, details are not described herein.
Correlation technique introduced below using equipment according to the present utility model
On the other hand the utility model provides a kind of side for preventing oxymethylene polymerization in polymethoxy dimethyl ether distillation process
Method, which comprises in rectifying column when rectifying polymethoxy dimethyl ether, the gas phase that rectifying tower top is discharged is distillated into a group lease making
Utilidor, which is imported into absorbing liquid, to be absorbed, wherein the temperature of the absorbing liquid is controlled at 30 to 50 DEG C.
In one embodiment, the temperature of the utilidor is maintained at 70 to 80 DEG C.
The gas phase distillates component and imported into absorbing liquid to be absorbed by way of gas-liquid mixed.
The absorbing liquid can be selected from methanol, dimethoxym ethane (DMMN1), dimethoxy methyl ether (DMMN2) etc., but be not limited to
This, and preferably dimethoxy methyl ether.
On the other hand the utility model provides a kind of method of rectifying polymethoxy dimethyl ether comprising: in rectifying column
In treat rectifying polymethoxy dimethyl ether carry out rectifying；Polymethoxy dimethyl ether distillation process is prevented using the utility model
The gas phase of the method processing rectifying tower top discharge of middle oxymethylene polymerization distillates component；And export rectifying is exported by rectifier bottoms
Product.
The condition that the polymethoxy dimethyl ether progress rectifying of rectifying is treated in rectifying column is not particularly limited, and can use
Usually used normal condition in the art.The number of plates of the rectifying column can be 10 to 20 in one embodiment,
Column bottom temperature can be 158 to 168 DEG C, and tower top temperature can be 70 to 80 DEG C, and reflux ratio can be 0.5 to 1.5, and pressure
Power can be 8 to 15kPa.
The method of rectifying polymethoxy dimethyl ether according to the present utility model can also include: by the suction in the return tank
The a part for receiving liquid is back in the rectifying column of polymethoxy dimethyl ether.
The method of rectifying polymethoxy dimethyl ether according to the present utility model can also include: by the suction in the return tank
The a part for receiving liquid is back in the reactor of production polymethoxy dimethyl ether.
Therefore, according to the process described above and equipment, the overhead condensation cooler of rectifying column can be steady
Surely 180 days or more are run without clogging.However, if using conventional rectifying device and method, rectifying column
Overhead condensation cooler run two day time can cause blockages, situation serious person, which even results in, to be unable to operate normally.
In addition, the yield of the rectifying polymethoxy dimethyl ether obtained according to the process described above and equipment can achieve
90% or more, in contrast, product yield when using conventional rectification device and method then only has 50% to 70%.
The rectifying polymethoxy two of an embodiment according to the present utility model is further illustrated next, with reference to Fig. 1
The equipment of methyl ether.
As shown in Figure 1, the rectifying device of the polymethoxy dimethyl ether includes: rectifying column 1, it is provided with the top of the distillation column
Outlet, rectifier entrance, rectifying column centre entrance, rectifying column lower entrances and rectifier bottoms outlet；And return tank
3, it is provided with return tank top entry, return tank upper entrance, return tank lower part outlet and return tank outlet at bottom.
Wherein, the top of the distillation column outlet is connected by utilidor with the return tank upper entrance, will be described
The temperature that the gas phase of the top of the distillation column outlet discharge distillates component is maintained at 70 to 80 DEG C.
Wherein, the return tank top entry and return tank outlet at bottom are connected with heat exchanger 4, are recycled back to constitute
Road is to control the temperature of return tank at 30 to 50 DEG C.
Wherein, the return tank lower part outlet is connected with the rectifier entrance.In addition, the return tank lower part goes out
Mouth is also connected with the entrance of polymethoxy dimethyl ether reactor.
The number of plates of the rectifying column is 10 to 20, preferably 15.
The rectifier bottoms outlet and rectifying column lower entrances are connected with reboiler 2 to constitute circulation loop.
The rectificating method of polymethoxy dimethyl ether further described below using the apparatus described above.
Polymethoxy dimethyl ether to rectifying is directed in rectifying column 1 by the rectifying column centre entrance carries out essence
Evaporate, rectifying condition are as follows: the number of plates of rectifying column be 10 to 20, preferably 15,158 to 168 DEG C of column bottom temperature, tower top temperature 70
To 80 DEG C, reflux ratio 0.5 to 1.5 and pressure 8 to 15kPa.Wherein, the polymethoxy dimethyl ether to rectifying contains first
The light components such as acetal, formaldehyde, the rectifying in rectifying column 1 and distillate component as gas phase and distillated.
Then, outlet derived gas phase in the top of the distillation column distillates component and is directed to return tank by return tank upper entrance
It in 3, is absorbed by way of gas-liquid mixed by absorbing liquid therein, wherein component is distillated to derived gas phase and is kept the temperature
To keep the temperature at 70 to 80 DEG C, and wherein, the temperature of the absorbing liquid is controlled at 30 to 50 DEG C.
In return tank 3, gas phase distillates that component is in contact with absorbing liquid and absorbed liquid is absorbed, at this point, even if formaldehyde
Molecule generates paraformaldehyde, and concentration in the liquid phase is relatively low, and is less susceptible to blocking pipeline.
The absorbing liquid is recycled by return tank top entry and return tank outlet at bottom with heat exchanger 4, to realize
Temperature control to the absorbing liquid.Herein, absorbing liquid is guided to flow back by the way that cooling pump 5 is arranged in circulation line
Circulation between tank 3 and heat exchanger 4.
Return tank lower part outlet is also connected with reflux pump 6, and a part in absorbing liquid is passed through rectifying column using reflux pump 6
Upper entrance, which is back in rectifying column 1, re-starts rectifying, and a part is back in the reactor of polymethoxy dimethyl ether
Reaction is participated in again.
In addition, rectifier bottoms outlet and rectifying column lower entrances and reboiler 2 constitute circulation loop, to maintain rectifying column
Rectification temperature in 1.
In addition, rectifier bottoms outlet and tower bottom extraction pump 7, to export rectifying product, i.e. polymethoxy dimethyl ether.
Although specific embodiment of the present utility model has been described in detail, those skilled in the art will be managed
Solution, such detailed description is only preferred embodiment, and the scope of the utility model is not limited to this.Cause
This, the true scope of the utility model should be defined by the following claims and their equivalents.
Claims (9)
1. a kind of equipment of rectifying polymethoxy dimethyl ether, which is characterized in that the equipment includes:
Rectifying column, is provided with that gas phase distillates the tower top outlet of component and bottom for exporting rectifying product goes out for being discharged
Mouthful；And
Return tank, is provided with the return tank top first entrance that component is distillated for importing gas phase, and for by return tank
Temperature regulating device of the temperature control at 30 to 50 DEG C,
Wherein, the top of the distillation column outlet is connected by utilidor with return tank top first entrance.
2. the equipment of rectifying polymethoxy dimethyl ether according to claim 1, wherein the temperature regulating device includes that setting exists
Adding inside the return tank or around return tank setting is arranged in the heat exchanger of the return tank outside or inside
Heat or cooling device.
3. the equipment of rectifying polymethoxy dimethyl ether according to claim 2, wherein the temperature regulating device is setting in institute
The heat exchanger outside return tank is stated, at this point, the return tank is additionally provided with return tank top entry and return tank outlet at bottom, point
It is not connected to the entrance of the heat exchanger.
4. the equipment of rectifying polymethoxy dimethyl ether according to claim 1, wherein the utilidor is using heat preservation dress
It sets and is kept the temperature, wherein the attemperator includes thermal insulation material, heating device and heat exchange sleeve.
5. the equipment of rectifying polymethoxy dimethyl ether according to claim 1, wherein the return tank is additionally provided with reflux
Tank lower part outlet, the rectifying column are additionally provided with rectifier entrance, and the return tank lower part outlet and the rectifying
Tower upper entrance is connected.
6. the equipment of rectifying polymethoxy dimethyl ether according to claim 1, wherein the return tank lower part outlet also connects
It is connected to the entrance of polymethoxy dimethyl ether reactor.
7. the equipment of rectifying polymethoxy dimethyl ether according to claim 1, wherein the number of plates of the rectifying column is 10
To 20.
8. the equipment of rectifying polymethoxy dimethyl ether according to claim 7, wherein the number of plates of the rectifying column is
15。
9. the equipment of rectifying polymethoxy dimethyl ether according to claim 1,
Wherein, the equipment further includes the reboiler being arranged in outside rectifying column,
At this point, the rectifying column is additionally provided with:
Rectifying column centre entrance, for introducing the polymethoxy dimethyl ether to rectifying, and
Rectifying column lower entrances,
Wherein, the outlet at bottom of the rectifying column and rectifying column lower entrances are connected with reboiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820716910.3U CN208632418U (en) | 2018-05-14 | 2018-05-14 | A kind of equipment of rectifying polymethoxy dimethyl ether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820716910.3U CN208632418U (en) | 2018-05-14 | 2018-05-14 | A kind of equipment of rectifying polymethoxy dimethyl ether |
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| Publication Number | Publication Date |
|---|---|
| CN208632418U true CN208632418U (en) | 2019-03-22 |
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ID=65732885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820716910.3U Active CN208632418U (en) | 2018-05-14 | 2018-05-14 | A kind of equipment of rectifying polymethoxy dimethyl ether |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508018A (en) * | 2019-09-03 | 2019-11-29 | 中国石油大学(华东) | Produce the device and method of polymethoxy dimethyl ether |
-
2018
- 2018-05-14 CN CN201820716910.3U patent/CN208632418U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110508018A (en) * | 2019-09-03 | 2019-11-29 | 中国石油大学(华东) | Produce the device and method of polymethoxy dimethyl ether |
| CN110508018B (en) * | 2019-09-03 | 2022-02-25 | 中国石油大学(华东) | Device and method for producing polymethoxy dimethyl ether |
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