CN206315495U - Multicomponent product rectifying separator - Google Patents
Multicomponent product rectifying separator Download PDFInfo
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- CN206315495U CN206315495U CN201621396637.8U CN201621396637U CN206315495U CN 206315495 U CN206315495 U CN 206315495U CN 201621396637 U CN201621396637 U CN 201621396637U CN 206315495 U CN206315495 U CN 206315495U
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- tower body
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- reboiler
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Abstract
The utility model discloses a kind of multicomponent product rectifying separator, condenser, return tank including tower body, at the top of tower body and the reboiler positioned at tower body bottom, it is characterized in that the tower body is rectifying column, it is upright provided with a dividing plate in tower, the tower top outlet of the tower body connects the entrance of condenser by pipeline, the outlet of condenser connects the entrance of return tank by pipeline, the outlet of return tank includes two-way, the reflux inlet with tower body top is connected all the way, and another road is light fraction outlet.Using technical solutions of the utility model, the clean separation of multi-component masses can be realized in a device, number of devices, floor space and energy consumption can be reduced, and equipment gross investment can typically reduce by 30% or so, and energy-saving effect is notable.
Description
Technical field
The utility model is related to polycrystalline silicon material preparing technical field, and in particular to a kind of multicomponent product rectifying separation
Device.
Background technology
In the world 80% polycrystalline silicon material be all as manufactured by improved Siemens, the technique using high-purity trichlorosilane as
Raw material, is reduced on 1100 DEG C or so of HIGH-PURITY SILICON core using high-purity hydrogen, and silicon core is gradually long thick, harvest polycrystalline silicon rod production
Product, but its production process can also produce the accessory substances such as substantial amounts of hydrogen, hydrogen chloride and silicon tetrachloride.Chlorine hydrogenation is polysilicon life
The important procedure of production, it is in 500 DEG C of temperature by the silicon tetrachloride of by-product, hydrogen chloride, dichlorosilane in polysilicon production process
Under, trichlorosilane raw material is then converted to by reaction, and then realize the closed cycle of production.
Generally, four chlorinations containing 25% or so trichlorosilane, 72% or so in the chlorosilane product of chlorine hydrogenation apparatus
Silicon, 2% or so dichlorosilane and 1% or so restructuring thing (high-boiling components, silica flour etc.).General method for separating and processing is,
Rectifier unit is sent further to purify by crude tower, overhead extraction trichlorosilane and dichlorosilane chlorosilane product, tower reactor
Silicon tetrachloride and restructuring thing are produced, reaction is continued to participate in as the raw material of chlorine hydrogenation apparatus.In actual production process, due to this portion
Divide in the silicon tetrachloride mixed material of tower reactor extraction containing high-boiling components, silica flour etc., be easily caused the silicon tetrachloride vapour of subsequent processing
Change tower, reboiler to block, be unfavorable for the long-period stable operation of device.
Some corresponding reports are had in the prior art, and such as Publication No. CN102030335A Chinese patent is open
It is a kind of to be related to the method and apparatus that the hot coupling reactive distillation of double tower removes boron impurities in chlorosilane system.It is in rectifying column T1 bottom of towe
Circulating pump is set, the material parts pump containing unreacted reactant is walked around into rectifying column T1, internal circulating load for inlet amount 6%~
7%.Rectifying column T1 is plate column, and rectifying column T2 towers are packed tower or plate column.By the trichlorosilane raw material containing boron impurity
(1) by feeding in the middle part of rectifying column T1 towers, reactant (2) is entered by rectifying column T1 tower tops, it is therefore an objective to extended contact time, and allows boracic
Compound can obtain more complete with reaction reaction.Rectifying column T1 overhead vapours (3) enters in the middle part of rectifying column T2 towers, and here
Produce backflow of the partially liq (4) as rectifying column T1 column overheads.Such as Publication No. CN101920964B Chinese patent is public
A kind of method for purifying silicon tetrachloride by double-effect distillation is opened, it comprises the following steps：(1) the thick silicon tetrachloride that FEOL is obtained is first
Into spray column, the liquid phase that the gas phase of the cold segregator extraction of spray column overhead obtains for fixed gas and through segregator condensation is thick
Silicon tetrachloride partial reflux, partly enters lightness-removing column as discharging；Boiled again into spray column tower reactor spray column tower reactor output section
Device, part is produced；(2) lightness-removing column top gas is mutually produced enters weight-removing column tower reactor condensation reboiler as thermal source, turns into liquid after heat exchange
The thermal source part of phase is flowed back as lightness-removing column overhead reflux liquid, and part is produced；Thick silicon tetrachloride part in lightness-removing column tower reactor is entered
Enter lightness-removing column tower reactor reboiler and part enters weight-removing column as discharging；(3) weight-removing column overhead extraction gas phase enters weight-removing column
Tower top complete condenser, obtained liquid phase part is condensed through complete condenser and is flowed back, is partly discharged with product silicon tetrachloride.
It is above-mentioned to employ two-tower rectification in the prior art, in addition multi-tower combined operation technical scheme, it is but such
Technical scheme is more due to number of devices, and floor space is larger, and fixed assets investment is more.And because number of devices is more, behaviour
Energy consumption during work is also larger.Therefore, on the premise of ensureing that multicomponent product is smoothly detached, equipment investment is reduced, is reduced
Energy consumption, is the problem that polysilicon enterprise value must be studied.
Utility model content
For the weak point of the existing chlorosilane separator of polysilicon industry, to realize dividing completely for multicomponent product
From while the separation expense to save multicomponent product, it is ensured that " cleanliness factor " of silicon tetrachloride raw material, the utility model is provided
A kind of multicomponent product rectifying separator.
To achieve the above object, the technical solution of the utility model is as follows：
A kind of multicomponent product rectifying separator, including tower body 1, the condenser 2 at the top of tower body, the and of return tank 3
Reboiler 5 positioned at tower body bottom, it is characterised in that the tower body 1 is rectifying column, it is upright provided with a dividing plate 4, institute in tower
State the middle part that dividing plate 4 is arranged on tower body 1；The tower top outlet of the tower body 1 connects the entrance of condenser 2, condenser 2 by pipeline
Outlet the entrance of return tank 3 is connected by pipeline, the outlet of return tank 3 includes two-way, is passed back into all the way with the top of tower body 1
Mouth is connected, and another road is light fraction outlet.
Wherein, the quantity of reboiler 5 is two.It is further preferred that the reboiler 5 is to be thermally integrated reboiler or steaming
Vapour reboiler.Two reboilers be able to can also differ with identical, i.e., still more preferably, described two reboilers not phase
Together, reboiler and Steam reboiler are respectively thermally integrated.
Wherein, the pipeline that the return tank 3 is connected with the upper return entrance of tower body 1 includes two-way, according to the tower body longitudinal axis pair
The position of title, its pipeline is connected with the both sides reflux inlet of tower body 1 respectively.
It is further preferred that the pipeline that the return tank 3 is connected with tower body 1 is provided with autocontrol valve, pass through valve control
System backflow material enters the inlet amount of tower body.
Wherein, the top of tower body 1 and the both sides of dividing plate 4 are provided with mass transfer original paper, and the top of tower body 1 is provided with filler, described
Filler is arranged on the top of dividing plate 4.
It is further preferred that the mass transfer original paper is selected from float valve tray, bubble cap tray or sieve tray, the filler is selected from
Structured packing or random packing.
Still more preferably, the mass transfer original paper is selected from float valve tray, and the filler is selected from structured packing.
Wherein, the bottom of tower body 1 is also connected with tower reactor cooler 6, and the outlet of tower reactor cooler 6 sends outlet outside for slurry.
The crude tower of former chlorine hydrogenation apparatus only has tower top and tower reactor extraction, it is impossible to by the high-boiling components in tower reactor silicon tetrachloride and
The components such as silica flour are separated, and are influenceed the quality of silicon tetrachloride raw material, are such as further added by a tower, then overall investment and energy consumption will increase by one
Times.
The utility model can realize that different component concentrates on different parts in tower body, then by the product of different parts from
Lateral line withdrawal function, then can be enriched with the several prods of different component respectively.And only need to a tower and achieve that three kinds of materials
Cleaning separation, can be greatly lowered energy consumption and equipment investment, be particularly suitable for the separation of multi-component masses.
Beneficial effect：
Technical solutions of the utility model make the separation task that 2 towers of needs could be completed originally, realize by 1 tower
Complete.Number of devices, floor space and energy consumption can be reduced, and equipment gross investment can typically reduce by 30% or so.
Separator provided by the utility model can realize that trichlorosilane is separated with the cleaning of silicon tetrachloride, moreover it is possible to real
Existing silicon tetrachloride is separated with the cleaning of high-boiling components and silica flour, and entirety ability is compared with prior art lifting more than 20%.
The utility model ensure that system is overall using being thermally integrated by the way of reboiler is engaged with Steam reboiler
Evaporation capacity.By actual motion, actual steam unit consumption relatively designs steam mono-consumption and declines 20% or so, is thermally integrated reboiler and comes into operation
Afterwards, steam mono-consumption declines 40% or so compared with design objective.Compared with two-tower rectification, technical solutions of the utility model can be saved in year
50,000 tons or so of steam, energy-saving effect is notable.
The utility model device is stable, stable operation, and disposal ability exceeds Design cooling load, and product quality refers to better than design
Mark.
Brief description of the drawings
Fig. 1 is the schematic diagram of multicomponent product rectifying separator described in the utility model；
Fig. 2 is another schematic diagram of multicomponent product rectifying separator described in the utility model；
In figure：1- tower bodies；2- condensers；3- return tanks；4- dividing plates；5- reboilers；5a- is thermally integrated reboiler；5b- steam
Reboiler；6- tower reactor coolers.
Embodiment：
Multicomponent rectification separator of the present utility model is carried out below by way of specific embodiment and with reference to accompanying drawing detailed
Describe in detail bright, it is necessary to explanation, involved connected mode and link position are only to illustrate that this practicality is new in embodiment
Type, protection domain of the present utility model is not limited to these specific embodiments.
Multicomponent product rectifying separator as shown in Figure 1, including tower body 1, the condenser 2 at the top of tower body, return
Flow tank 3 and the reboiler 5 positioned at tower body bottom, it is characterised in that the tower body 1 be in rectifying column, tower it is upright provided with one every
Plate 4, the dividing plate 4 is arranged on the middle part of tower body 1, and the inner space of tower body 1 is separated into four intervals；The tower of the tower body 1
The entrance that mouth connects condenser 2 by pipeline is ejected, the outlet of condenser 2 connects the entrance of return tank 3, return tank by pipeline
3 outlet includes two-way, and the reflux inlet with the top of tower body 1 is connected all the way, and another road is light fraction outlet.
In the particular embodiment, as shown in Fig. 2 the inner space of tower body 1 is separated into four intervals, and institute by dividing plate 4
The quantity of reboiler 5 is stated for two.It is further preferred that the reboiler 5 is to be thermally integrated reboiler or Steam reboiler.Two again
Boiling device be able to can also be differed with identical, i.e., still more preferably, described two reboilers are differed, and are respectively thermally integrated again
Boil device 5a and Steam reboiler 5b (as shown in Figure 2)., can using being thermally integrated by the way of reboiler is engaged with Steam reboiler
The overall evaporation capacity of guarantee system.The pipeline that the return tank 3 is connected with the upper return entrance of tower body 1 includes two-way, according to tower
Body indulges axisymmetric position, and its pipeline is connected with the both sides reflux inlet of tower body 1 respectively.It is further preferred that the backflow
The pipeline that tank 3 is connected with tower body 1 is provided with autocontrol valve, and the inlet amount of tower body is entered by Valve controlling backflow material.Institute
The valve stated strictly controls the feed back amount of the both sides of tower body 1, is allowed to match with the left side inlet amount of tower body 1, right side produced quantity,
And then ensureing the stabilization of ascending air in tower, the pressure drop of dividing plate both sides is identical, and the identical interval temperature of dividing plate both sides horizontal level
Degree is essentially identical.
In practical operation, the top of tower body 1 and the both sides of dividing plate 4 are both provided with mass transfer original paper, and the mass transfer original paper is selected from
Float valve tray, bubble cap tray or sieve tray, it is further preferred that the mass transfer original paper is selected from float valve tray.On the tower body 1
Portion is provided with filler, and the filler is arranged on the top of dividing plate 4, and the filler is selected from structured packing or random packing.It is further excellent
Choosing, the filler is selected from structured packing.In addition, the bottom of tower body 1 is also connected with tower reactor cooler 6, tower reactor cooler 6 goes out
Mouth sends outlet outside for slurry.
For a person skilled in the art, the condenser 2 and return tank 3 or reboiler 5 and tower reactor cooler 6
Link position there is no considered critical, as long as corresponding effect can be realized.In the particular embodiment, raw material contains tetrachloro
SiClx, trichlorosilane, dichlorosilane, restructuring thing etc.) enter from the left upper portion of dividing wall column 1 in dividing wall column 1,
The middle part of tower body 1 and top carry out rectifying.By multiple rectifying, silicon tetrachloride material is extracted out from the right side of dividing wall column 1, is made
Recycled for more clean raw material for multicomponent rectification separator.Light component material (usually contains trichlorosilane and two
Chlorine dihydro silicon) it is up along the inside of dividing wall column 1, from tower top outlet by pipeline to overhead condenser 2, by tower top
After condenser 2 is cooled down, from entrance of the outlet of condenser 2 by pipeline to return tank 3, come out from return tank 3 later
Material is divided into two-way, leads up to governor valve control, enters tower body 1 from the left and right sides entrance on the top of dividing wall column 1 respectively,
Another road (trichlorosilane and dichloro-dihydro silicon materials) is further purified as delivering to next workshop section outside product.Heavy constituent material
(containing high-boiling components and silica flour), along the inner downlink of dividing wall column 1, after tower reactor is cooled down through tower reactor cooler 6, delivers to slurry
Device is handled.
The utility model multicomponent product rectifying separator, major technique effect is embodied in separating effect and steam consumption
Stablize the two aspects, concentration back-mixing of the entrained components in separation sequence can be reduced, and then reach the purpose of energy-conservation.It is overall
Disposal ability is substantially better than existing skill compared with prior art lifting more than 20%, overhead extraction product and tower side extraction product index
STC entrainments are 0 in art, overhead extraction product, TCS entrainments less than 0.05% in tower side extraction product, reduce trichlorine in system
The internal circulating load of hydrogen silicon, further reduces operating cost, reduces steam consumption year more than 50,000 tons.As can be seen that the utility model institute
The multicomponent product rectifying separator separating ranges of offer are wide, high precision, and energy-saving effect is notable.
Although detailed description is given to embodiment of the present utility model above and is illustrated, it should be noted that
It is that we can carry out various equivalent changes and modification according to conception of the present utility model to above-mentioned embodiment, produced by it
Function still covered without departing from specification and accompanying drawing spirit when, all should be within protection domain of the present utility model.
Claims (10)
1. a kind of multicomponent product rectifying separator, including tower body (1), the condenser (2) at the top of tower body, return tank
(3) and the reboiler (5) positioned at tower body bottom, it is characterised in that the tower body (1) is upright in rectifying column, tower to be provided with one
Dividing plate (4), the dividing plate (4) is arranged on the middle part of tower body (1)；The tower top outlet of the tower body (1) is connected by pipeline and condensed
The entrance of device (2), the outlet of condenser (2) connects the entrance of return tank (3) by pipeline, and the outlet of return tank (3) includes two
Road, all the way the reflux inlet with tower body (1) top be connected, another road be light fraction outlet.
2. multicomponent product rectifying separator according to claim 1, it is characterised in that described reboiler (5) number
Measure as two.
3. multicomponent product rectifying separator according to claim 2, it is characterised in that described reboiler (5) is
It is thermally integrated reboiler or Steam reboiler.
4. multicomponent product rectifying separator according to claim 2, it is characterised in that described two reboilers not phase
Together, reboiler and Steam reboiler are respectively thermally integrated.
5. the multicomponent product rectifying separator according to claim any one of 1-4, it is characterised in that the return tank
(3) pipeline being connected with tower body (1) upper return entrance includes two-way, and axisymmetric position is indulged according to tower body, its pipeline difference
It is connected with the both sides reflux inlet of tower body (1).
6. multicomponent product rectifying separator according to claim 5, it is characterised in that the return tank (3) and tower
The pipeline of body (1) connection is provided with autocontrol valve, and the inlet amount of tower body is entered by Valve controlling backflow material.
7. the multicomponent product rectifying separator according to claim any one of 1-4, it is characterised in that the tower body
(1) top and dividing plate (4) both sides are provided with mass transfer original paper, and tower body (1) top is provided with filler, and the filler is arranged on dividing plate
(4) top.
8. multicomponent product rectifying separator according to claim 7, it is characterised in that the mass transfer original paper is selected from floating
Valve tower tray, bubble cap tray or sieve tray, the filler are selected from structured packing or random packing.
9. multicomponent product rectifying separator according to claim 8, it is characterised in that the mass transfer original paper is selected from floating
Valve tower tray, the filler is selected from structured packing.
10. the multicomponent product rectifying separator according to claim any one of 1-4, it is characterised in that the tower body
(1) bottom is also connected with tower reactor cooler (6), and the outlet of tower reactor cooler (6) sends outlet outside for slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621396637.8U CN206315495U (en) | 2016-12-19 | 2016-12-19 | Multicomponent product rectifying separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621396637.8U CN206315495U (en) | 2016-12-19 | 2016-12-19 | Multicomponent product rectifying separator |
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| Publication Number | Publication Date |
|---|---|
| CN206315495U true CN206315495U (en) | 2017-07-11 |
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ID=59268114
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621396637.8U Active CN206315495U (en) | 2016-12-19 | 2016-12-19 | Multicomponent product rectifying separator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108434774A (en) * | 2018-06-28 | 2018-08-24 | 北京泽华化学工程有限公司 | It is a kind of to detach C6 to the device of C9+ BTX aromatics using next door tower |
| CN114014324A (en) * | 2021-12-21 | 2022-02-08 | 新疆大全新能源股份有限公司 | Distillation process of trichlorosilane |
| CN116173536A (en) * | 2023-03-30 | 2023-05-30 | 清电光伏科技有限公司 | Polysilicon rectifying system and rectifying method |
-
2016
- 2016-12-19 CN CN201621396637.8U patent/CN206315495U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108434774A (en) * | 2018-06-28 | 2018-08-24 | 北京泽华化学工程有限公司 | It is a kind of to detach C6 to the device of C9+ BTX aromatics using next door tower |
| CN114014324A (en) * | 2021-12-21 | 2022-02-08 | 新疆大全新能源股份有限公司 | Distillation process of trichlorosilane |
| CN116173536A (en) * | 2023-03-30 | 2023-05-30 | 清电光伏科技有限公司 | Polysilicon rectifying system and rectifying method |
| CN116173536B (en) * | 2023-03-30 | 2023-10-24 | 清电光伏科技有限公司 | Polysilicon rectifying system and rectifying method |
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