CN205616824U - Organosilicon takes off highly and takes off low tower vary voltage thermal coupling rectification plant - Google Patents
Organosilicon takes off highly and takes off low tower vary voltage thermal coupling rectification plant Download PDFInfo
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- CN205616824U CN205616824U CN201620301670.1U CN201620301670U CN205616824U CN 205616824 U CN205616824 U CN 205616824U CN 201620301670 U CN201620301670 U CN 201620301670U CN 205616824 U CN205616824 U CN 205616824U
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Abstract
The utility model discloses an organosilicon takes off highly and takes off low tower vary voltage thermal coupling rectification plant, including taking off the high tower and taking off low tower, the thick monomer of methylchlorosilane gets into and takes off high tower, tower cauldron extraction heavy ends, top of the tower extraction light component, take off the entering of high tower overhead gas looks material part and take off low tata cauldron reboiler as the heat source, coming out the back from the reboiler and getting into and to take off high tower top reflux jar, the remaining high tower overhead gas looks through -put that takes off also to get into after the condensation of high tower overhead condenser and takes off high tower top reflux jar, dimethyl dichlorosilane in the return tank and than dimethyl dichlorosilane low -boiling one of them part of light component condensation liquid phase return as the backward flow and take off the high tower top of the tower, another part gets into as the feeding takes off low tower, the mixture that takes off low tata cauldron extraction gets into follow -up treating column and refines. The utility model discloses an adopt vary voltage thermal coupling technique and device, will take off high tower overhead gas looks material as the heat source that takes off low tata cauldron reboiler, the rational utilization take off the power steam volume of high tower overhead gas looks, both reduced the energy consumption, practiced thrift the energy again, reduced the quantity of circulating water simultaneously.
Description
Technical field
This utility model relate in the methylchlorosilane segregation apparatus in a kind of rectifying device, particularly organosilicon industry de-high tower with
The transformation thermal coupling rectifying device of de-low tower.
Background technology
In high reaction temperatures, by catalyst by halogenated hydrocarbon and silica flour one step effect, generate methylchlorosilane crude monomer,
Mainly contain tri-methyl-chlorosilane (Me3), monomethyl trichlorosilane (Me1) and dimethyldichlorosilane (Me2), and ratio two
High-boiling components that dimethyl dichlorosilane (DMCS) (Me2) boiling point is high and than tri-methyl-chlorosilane (Me3) low-boiling low-boiling-point substance.
Methylchlorosilane crude monomer separates and all can enter de-high tower through Tuo Gao and de-low process, i.e. methylchlorosilane crude monomer,
Part dimethyldichlorosilane (Me2) and the high-boiling components higher than dimethyldichlorosilane (Me2) boiling point is included in tower reactor removing,
Overhead product enters de-low tower, and overhead extraction is mainly composed of tri-methyl-chlorosilane (Me3) and compares tri-methyl-chlorosilane
(Me3) low-boiling low-boiling-point substance, tower reactor extraction is mainly composed of monomethyl trichlorosilane (Me1) and dimethyldichlorosilane (Me2)
Mixture.These low-boiling-point substances, high-boiling components and mixture respectively enter follow-up rectifying column and separate.As producing dimethyl two
The upstream process of chlorosilane Me2, de-high tower is also particularly important with the reasonably optimizing of de-low tower.
Industrial de-high tower and de-low tower typically use the series model of routine, i.e. methylchlorosilane crude monomer to enter de-high tower,
Tower reactor extraction heavy constituent, including part dimethyldichlorosilane (Me2) and higher than dimethyldichlorosilane (Me2) boiling point
High-boiling components；Overhead extraction dimethyldichlorosilane (Me2) and the light component lower than dimethyldichlorosilane (Me2) enter de-
Low tower.De-low tower tower reactor extraction is mainly composed of mixing of dimethyldichlorosilane (Me2) and monomethyl trichlorosilane (Me1)
Compound, overhead extraction is mainly composed of tri-methyl-chlorosilane (Me3) and low boiling more low-boiling than tri-methyl-chlorosilane (Me3)
Thing.De-high tower and de-low tower can be composed in series by single tower or multiple tower according to the demand of user couple, owing to de-high tower is with de-
Low tower is in distillation process foremost, and inlet amount is very big, and separation accuracy requires the highest.Energy consumption is equivalent to binary tower
About 40%, so recirculated water and the large usage quantity of steam, energy consumption is higher.
The Chinese patent of Application No. 201010209928.2 proposes a kind of parallel double-effect distillation method separating Me1 and Me2,
But do not solve methylchlorosilane crude monomer de-high and de-low during highly energy-consuming problem.Application No. 201210032092.2
Chinese patent proposes the new technology that a kind of methylchlorosilane crude monomer separates, but for de-high tower and the energy consumption problem of de-low tower
Still do not solve.
Utility model content
In order to solve problems of the prior art, this utility model provides the de-height of a kind of organosilicon and de-low tower transformation thermal coupling
Rectifying device, overcomes de-high tower and de-low tower recirculated water and the large usage quantity of steam, the problem that energy consumption is higher in prior art.
The technical solution adopted in the utility model is: organosilicon is de-high and takes off low tower transformation thermal coupling rectifying device, including de-high tower
With de-low tower, methylchlorosilane crude monomer enters de-high tower, and tower reactor extraction heavy constituent, including part dimethyldichlorosilane and ratio
The high-boiling components that dimethyldichlorosilane boiling point is high；Overhead extraction dimethyldichlorosilane and than dimethyldichlorosilane low-boiling gently
Component；De-high tower top gaseous phase material parts enters de-low tower tower reactor reboiler as thermal source；De-height is entered the most afterwards from reboiler
Column overhead return tank, remaining de-high tower top gaseous phase material by de-high tower overhead condenser condense after also into de-high column overhead
Return tank, dimethyldichlorosilane in return tank and the low-boiling light component condensation liquid phase wherein than dimethyldichlorosilane
Being allocated as returning de-high column overhead for backflow, another part enters de-low tower as charging；De-low column overhead extraction includes trimethyl one
Chlorosilane and more low-boiling low-boiling-point substance than tri-methyl-chlorosilane, de-low tower tower reactor extraction be mainly composed of dimethyldichlorosilane and
The mixture of monomethyl trichlorosilane enters follow-up treating column and refines.
Described de-high tower uses pressurization or atmospheric distillation tower；Described de-low tower uses normal pressure or negative pressure rectifying column.
Described de-high tower is plate column or packed tower with de-low tower.
Described de-high tower bottom is for preventing blocking, preferably plate column；Packed tower has lower operation pressure drop, therefore takes off on high tower
Portion and de-low tower preferred filler tower.
A kind of transformation thermal coupling rectificating method, flow process is as follows: methylchlorosilane crude monomer enters and takes off high tower, tower reactor extraction heavy constituent,
Including part dimethyldichlorosilane and the high-boiling components higher than dimethyldichlorosilane boiling point；Overhead extraction dimethyldichlorosilane and
The low-boiling light component than dimethyldichlorosilane；De-high tower top gaseous phase material parts enters de-low tower tower reactor reboiler as heat
Source；Enter de-high tower return tank of top of the tower the most afterwards from de-low tower reboiler, remaining de-high tower top gaseous phase material is by de-high tower
After overhead condenser condensation, also into de-high tower return tank of top of the tower, (size of this part stream stock depends on de-high tower (high pressure) tower
The heat that top gas provides mutually and the difference taking off low tower (low pressure) tower reactor institute calorific requirement.Generally take off high tower (high pressure) tower top
The heat that gas phase provides is above de-low tower (low pressure) tower reactor institute calorific requirement.If both are equal, this road stream stock does not exists
).Dimethyldichlorosilane in return tank and than dimethyldichlorosilane low-boiling light component condensation liquid phase a portion make
Returning de-high column overhead for backflow, another part enters de-low tower as charging；De-low column overhead extraction includes trimethyl one chlorine silicon
Alkane and more low-boiling low-boiling-point substance than tri-methyl-chlorosilane, de-low tower tower reactor extraction is mainly composed of dimethyldichlorosilane and a first
The mixture of base trichlorosilane enters follow-up treating column and refines.
The tower reactor drop temperature that described de-high tower top gaseous phase temperature relatively takes off low tower is high more than 2～20 DEG C.
Described de-high column overhead operation pressure is 0.1～1.0MPa.
Described de-low column overhead operation pressure is 0.001～0.5MPa.
The beneficial effects of the utility model are: this utility model makes full use of the feature of handled material, by using the hot coupling of transformation
Close technology and equipment, using de-high tower top gaseous phase material as the thermal source of de-low tower tower reactor reboiler, the de-high tower tower of Appropriate application
The steam energy of top gas phase, had both reduced energy consumption, had saved again the energy so that the more conventional technique of energy consumption reduces 20～more than 45%,
Reduce the consumption of recirculated water simultaneously；This utility model is the technology utilizing transformation thermal coupling, and targeted is that methylchlorosilane is thick
De-high tower in monomer separation and de-low tower, equipment and technical maturity are reliable.
Accompanying drawing explanation
Fig. 1 is de-high tower and the transformation thermal coupling rectifying device flow process taking off low tower in methylchlorosilane segregation apparatus of the present utility model
Figure；
Wherein: 1 take off high tower, 2 take off low tower, 3 take off high tower reboiler, 4 take off low tower reboiler, 5 take off high tower condenser,
6 take off high tower return tank.
Detailed description of the invention
With specific embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
This utility model equipment process material be methylchlorosilane crude monomer, mainly contain tri-methyl-chlorosilane (Me3), one
Methyl trichlorosilane (Me1) and dimethyldichlorosilane (Me2), and the high-boiling components higher than dimethyldichlorosilane (Me2) boiling point
With than tri-methyl-chlorosilane (Me3) low-boiling low-boiling-point substance.The flow process that this utility model is suitable for is methylchlorosilane crude monomer
De-high and de-low process.By adjusting de-high tower and the operation pressure of de-low tower so that de-high tower top gaseous phase temperature relatively takes off low tower
Tower reactor drop temperature high more than 2～20 DEG C (temperature difference is unsuitable too high, in order to avoid energy consumption increases), so de-high tower top gaseous phase material is just
Energy-optimised purpose can be reached as the thermal source of de-low tower tower reactor reboiler.
Embodiment 1
As it is shown in figure 1, methylchlorosilane crude monomer separates de-high and de-low flow process, crude monomer total feed is 17000Kg/hr,
Wherein remembering with mass fraction: Me2 content is for 78%, and Me1 content is 7.18%, and the content of Me3 is 7.3%, its reinforcement boils
Thing and low-boiling point material are 7.52%.Transformation thermal coupling rectifying device of the present utility model, including de-high tower 1 and de-low tower 2, former
Material enters de-high tower 1 (high pressure), and tower reactor extraction heavy constituent, including part dimethyldichlorosilane (Me2) with than dimethyl two
The high-boiling components that chlorosilane (Me2) boiling point is high；Overhead extraction dimethyldichlorosilane (Me2) and than dimethyldichlorosilane (Me2)
Low light component.De-high tower 1 (high pressure) top gaseous phase material parts enters de-low tower 2 (low pressure) tower reactor reboiler 4, as
Thermal source.De-high tower 1 (high pressure) return tank of top of the tower 6, remaining de-high tower 1 (high pressure) is entered the most afterwards from de-low tower reboiler
Top gaseous phase material by after de-high tower 1 (high pressure) overhead condenser 5 also into de-high tower 1 (high pressure) return tank of top of the tower 6.
A portion returns de-high tower 1 (high pressure) tower top as backflow, and another part enters de-low tower 2 (low pressure) as charging.
On de-low tower, tower 2 (low pressure) overhead extraction includes being mainly composed of tri-methyl-chlorosilane (Me3) and comparing tri-methyl-chlorosilane
(Me3) low-boiling low-boiling-point substance, de-low tower 2 (low pressure) tower reactor extraction is mainly composed of dimethyldichlorosilane (Me2) and
The mixture of methyl trichlorosilane (Me1) enters follow-up treating column and refines.De-high tower 1 (high pressure) top gaseous phase temperature is relatively
Tower reactor drop temperature height 10-15 DEG C of tower 2 (low pressure) under de-low tower.De-high tower 1 (high pressure) tower top operation pressure is 0.2MPa (G),
On de-low tower, tower 2 (low pressure) tower top operation pressure is 0.035MPa (G).
The product volume and the quality group that obtain become:
If according to the de-high and de-low process equipment of classical tandem, under same treatment amount and product requirement, with energy of the present utility model
Consumption correction data is:
From above correction data it can be seen that use transformation Coupling device, at identical treating capacity and like products purity and product
During yield, heat consumption is only the 60.35% of traditional process, and condenser duty is the 56.19% of traditional process, the most significantly
Reduce the consumption of steam consumption and recirculated water.
The above is only preferred implementation of the present utility model, it is noted that for those skilled in the art
For, on the premise of without departing from this utility model principle, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection domain of the present utility model.
Claims (4)
1. organosilicon is de-high and takes off a low tower transformation thermal coupling rectifying device, including de-high tower and de-low tower, it is characterised in that methyl
Chlorosilane crude monomer enters de-high tower, and tower reactor extraction heavy constituent, including part dimethyldichlorosilane with than dimethyl dichloro silicon
The high-boiling components that alkane boiling point is high；Overhead extraction dimethyldichlorosilane and than dimethyldichlorosilane low-boiling light component；De-height
Column overhead gaseous phase materials is partially into de-low tower tower reactor reboiler as thermal source；Enter de-high column overhead the most afterwards to return from reboiler
Stream tank, remaining de-high tower top gaseous phase material by de-high tower overhead condenser condense after also into de-high tower overhead reflux
Tank, the dimethyldichlorosilane in return tank and low-boiling light component liquid phase a portion conduct than dimethyldichlorosilane
Backflow returns de-high column overhead, and another part enters de-low tower as charging；De-low column overhead extraction includes trimethyl one chlorine silicon
Alkane and more low-boiling low-boiling-point substance than tri-methyl-chlorosilane, de-low tower tower reactor extraction is mainly composed of dimethyldichlorosilane and
The mixture of methyl trichlorosilane enters follow-up treating column and refines.
Organosilicon the most according to claim 1 is de-high and takes off low tower transformation thermal coupling rectifying device, it is characterised in that described de-height
Tower uses pressurization or atmospheric distillation tower；Described de-low tower uses normal pressure or negative pressure rectifying column.
Organosilicon the most according to claim 1 is de-high and takes off low tower transformation thermal coupling rectifying device, it is characterised in that described de-height
Tower is plate column or packed tower with de-low tower.
Organosilicon the most according to claim 3 is de-high and takes off low tower transformation thermal coupling rectifying device, it is characterised in that described de-height
Tower bottom is plate column, and de-high tower top and de-low tower are packed tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301670.1U CN205616824U (en) | 2016-04-08 | 2016-04-08 | Organosilicon takes off highly and takes off low tower vary voltage thermal coupling rectification plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620301670.1U CN205616824U (en) | 2016-04-08 | 2016-04-08 | Organosilicon takes off highly and takes off low tower vary voltage thermal coupling rectification plant |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109224492A (en) * | 2018-11-28 | 2019-01-18 | 天津乐科节能科技有限公司 | Organic silicon monomer is from backheat rectifier unit and method |
| CN110041359A (en) * | 2019-04-10 | 2019-07-23 | 湖北兴瑞硅材料有限公司 | A kind of monomer separation energy saving technique and system |
| CN112500261A (en) * | 2020-11-30 | 2021-03-16 | 天津大学 | Energy-saving refining device and method for separating organic silicon crude monomer from chloromethane |
| CN114292290A (en) * | 2021-12-13 | 2022-04-08 | 华陆工程科技有限责任公司 | Reverse-sequence forward-flow energy-saving method and device for organic silicon crude monomer separation system |
-
2016
- 2016-04-08 CN CN201620301670.1U patent/CN205616824U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109224492A (en) * | 2018-11-28 | 2019-01-18 | 天津乐科节能科技有限公司 | Organic silicon monomer is from backheat rectifier unit and method |
| CN110041359A (en) * | 2019-04-10 | 2019-07-23 | 湖北兴瑞硅材料有限公司 | A kind of monomer separation energy saving technique and system |
| CN112500261A (en) * | 2020-11-30 | 2021-03-16 | 天津大学 | Energy-saving refining device and method for separating organic silicon crude monomer from chloromethane |
| CN112500261B (en) * | 2020-11-30 | 2023-10-17 | 云南能投硅材科技发展有限公司 | Energy-saving refining device and method for separating organic silicon crude monomer from chloromethane |
| CN114292290A (en) * | 2021-12-13 | 2022-04-08 | 华陆工程科技有限责任公司 | Reverse-sequence forward-flow energy-saving method and device for organic silicon crude monomer separation system |
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