CN205461092U - Rectification system - Google Patents
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- CN205461092U CN205461092U CN201620045975.0U CN201620045975U CN205461092U CN 205461092 U CN205461092 U CN 205461092U CN 201620045975 U CN201620045975 U CN 201620045975U CN 205461092 U CN205461092 U CN 205461092U
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Abstract
The utility model provides a rectification system, include: a plurality of rectifying columns have the export of going up, export and set up backward flow mouth and the return -air mouth between last export exports under, down, the reboiler has inlet, gas outlet, air inlet and liquid outlet, and one lower export in inlet and a plurality of rectifying columns communicates, and the return -air mouth of gas outlet and this rectifying column communicates, and upward the exporting of another in air inlet and a plurality of rectifying columns communicates, and the backward flow mouth of liquid outlet and this rectifying column communicates. The technical scheme of the utility model can solve the higher problem of polycrystalline silicon rectification system energy consumption among the prior art effectively.
Description
Technical field
This utility model relates to technical field of rectification, in particular to a kind of distillation system.
Background technology
Polysilicon is the key raw material of integrated circuit and photovoltaic generation.In recent years, along with the fast development in photovoltaic generation market,
The fast development the most therewith of production of polysilicon industry.But, the blind expansion of production of polysilicon industry also brings production cost simultaneously
The problem that increase, profit level reduce, polysilicon product price is plummeted especially at present, the production cost of major part producer
All it is higher than sale price.Under these circumstances, energy saving and cost lowering becomes the necessary means of each production of polysilicon producer maintenance sustainable development.
At present, in polysilicon production process, refined purification process is one of operation that energy consumption is higher.This refined purification process disappears
The main energy sources of consumption includes steam (hot water), high-low pressure recirculated water and electric energy etc., wherein steam (hot water) and the energy of recirculated water
Amount consumption accounts for more than 90%.Simultaneously as the circulating load of recirculated water is relatively big, frequently can lead to water evaporating loss relatively big, thus enter
One step increases the weight of the consumption of energy.Additionally, as depicted in figs. 1 and 2, existing distillation system include rectifying column 1 ' and with this essence
Evaporating the reboiler 2 ' that tower 1 ' connects, wherein, reboiler 2 ' is in order to send essence back to after being vaporized by the tower bottom liquid body portion of rectifying column 1 '
Evaporate tower 1 ', make in tower the contact mass transfer between gas-liquid two-phase be carried out.Fig. 1 illustrates a kind of flow process (upstream of existing distillation system
The bottom product of rectifying column is as the raw material of downstream rectifying column), Fig. 2 illustrates another kind of flow process (the upstream rectification of existing distillation system
The overhead product of tower is as the raw material of downstream rectifying column).In above two flow process, reboiler 2 ' needs outside system extra
Add thermal source, so also result in energy consumption higher.When actual production, in order to reduce operating cost, in view of western China
Electricity price advantage, most of larger production of polysilicon producers all start to carry out production of founding the factory in western China, but,
Another energy resource structure feature in west area is exactly water resources shortage.Therefore, the refined purification schemes of polysilicon it is applied at present
In west area inapplicable, this just constrains the development of production of polysilicon industry.
Utility model content
Main purpose of the present utility model is to provide a kind of distillation system, to solve polysilicon distillation system energy of the prior art
Consume higher problem.
To achieve these goals, this utility model provides a kind of distillation system, including multiple rectifying columns, have upper outlet,
Lower outlet and be arranged on the refluxing opening between upper outlet, lower outlet and gas returning port；Reboiler, have inlet, gas outlet,
The return-air of the lower outlet of in air inlet and liquid outlet, inlet and multiple rectifying columns, gas outlet and this rectifying column
Mouth connection, air inlet connects with another the upper outlet in multiple rectifying columns, and liquid outlet connects with the refluxing opening of this rectifying column.
Further, rectifying column includes: the first rectifying column, has the first upper outlet, first time outlet and is arranged on first
The first import, the first refluxing opening and the first gas returning port between outlet and first time outlet；Second distillation column, has on second
Mouthful, second time outlet and be arranged on the second upper outlet and second time outlet between the second import and the second refluxing opening；Reboiler
Including: the first reboiler, there is the first inlet, the first gas outlet, the first air inlet and the first liquid outlet, the first feed liquor
Mouth and first time outlet, the first gas outlet connects with the first gas returning port；Wherein, the first air inlet and the connection of the second upper outlet,
First liquid outlet and the connection of the second refluxing opening, first time outlet and the second inlet communication.
Further, rectifying column includes: the first rectifying column, has the first upper outlet, first time outlet and is arranged on first
The first import between outlet and first time outlet and the first refluxing opening；Second distillation column, has the second upper outlet, goes out for second time
Mouthful and be arranged on the second upper outlet and second time outlet between the second import, the second refluxing opening and the second gas returning port；Reboiler
Including: the second reboiler, there is the second inlet, the second gas outlet, the second air inlet and the second liquid outlet, the second feed liquor
Mouth and second time outlet, the second gas outlet connects with the second gas returning port；Wherein, the second air inlet and the connection of the first upper outlet,
Second liquid outlet and the first refluxing opening and the second inlet communication.
Further, distillation system also includes that the first condenser, the first condenser include: the first housing, the bottom of the first housing
Having the first inlet section, the top of the first housing has the first outlet section；First fan assembly, is positioned at the first outlet section；The
One cooling tube group, is arranged in the first housing and between the first inlet section and the first outlet section, and the first cooling tube group has the
One charging aperture, the second charging aperture, the 3rd charging aperture and the first discharging opening, the second discharging opening, the 3rd discharging opening, go out for second time
Mouth connects with the first charging aperture；First liquid distributor, is arranged in the first housing, and first liquid distributor is positioned at the first air-out
So that liquid is uniformly distributed in the first cooling tube group between portion and the first cooling tube group.
Further, the first upper outlet and the first refluxing opening connect, and the first upper outlet and the second charging aperture connect, and first goes out
Liquid mouth and the connection of the 3rd charging aperture.
Further, distillation system also includes that the second condenser, the second condenser include: the second housing, the bottom of the second housing
Having the second inlet section, the top of the second housing has the second outlet section；Second fan assembly, is positioned at the second outlet section；The
Two cooling tube groups, are arranged in the second housing and between the second inlet section and the second outlet section, and the second cooling tube group has the
Four charging apertures and the 4th discharging opening；Second liquid distributor, is arranged in the second housing, and second liquid distributor is positioned at second and goes out
So that liquid is uniformly distributed in the second cooling tube group between wind portion and the second cooling tube group；3rd cooling tube group, the 3rd cooling tube
In group is arranged on the second housing and between the second outlet section and second liquid distributor, the 3rd cooling tube group has the 5th charging
Mouth and the 5th discharging opening, the 5th discharging opening and the connection of the 4th charging aperture, the 5th charging aperture and the connection of the first upper outlet, the 4th discharging
Mouth connects with the first refluxing opening and the second charging aperture.
Further, distillation system also includes that the first condenser, the first condenser include: the first housing, the bottom of the first housing
Having the first inlet section, the top of the first housing has the first outlet section；First fan assembly, is positioned at the first outlet section；The
One cooling tube group, is arranged in the first housing and between the first inlet section and the first outlet section, and the first cooling tube group has the
One charging aperture, the second charging aperture, the 3rd charging aperture and the first discharging opening, the second discharging opening, the 3rd discharging opening, go out for second time
Mouth connects with the first charging aperture；First liquid distributor, is arranged in the first housing, and first liquid distributor is positioned at the first air-out
So that liquid is uniformly distributed in the first cooling tube group between portion and the first cooling tube group.
Further, the second upper outlet and the second refluxing opening connect, and the second upper outlet and the 3rd charging aperture connect, first time
Outlet connects with the second charging aperture.
Further, distillation system also includes that the second condenser, the second condenser include: the second housing, the bottom of the second housing
Having the second inlet section, the top of the second housing has the second outlet section；Second fan assembly, is positioned at the second outlet section；The
Two cooling tube groups, are arranged in the second housing and between the second inlet section and the second outlet section, and the second cooling tube group has the
Four charging apertures and the 4th discharging opening；Second liquid distributor, is arranged in the second housing, and second liquid distributor is positioned at second and goes out
So that liquid is uniformly distributed in the second cooling tube group between wind portion and the second cooling tube group；3rd cooling tube group, the 3rd cooling tube
In group is arranged on the second housing and between the second outlet section and second liquid distributor, the 3rd cooling tube group has the 5th charging
Mouth and the 5th discharging opening, the 5th discharging opening and the connection of the 4th charging aperture, the 5th charging aperture and the connection of the second upper outlet, the 4th discharging
Mouth connects with the second refluxing opening and the 3rd charging aperture.
Further, the first condenser also includes that the first demister, the first demister are arranged in the first housing and are positioned at the
Between one outlet section and first liquid distributor.
Application the technical solution of the utility model, is connected to reboiler in multiple rectifying column, the feed liquor of this reboiler
Mouthful with the lower outlet of this rectifying column, gas outlet connects with the gas returning port of this rectifying column.The air inlet of above-mentioned reboiler is with multiple
Another upper outlet connection in rectifying column, liquid outlet connects with the refluxing opening of this rectifying column.Said structure can make to be connected to
By another the overhead product in multiple rectifying columns, (such as tower top steams the thermal source of the reboiler in multiple rectifying columns
Vapour) provide, so can make full use of the energy in distillation system, thus be effectively reduced system energy consumption.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing being further appreciated by of the present utility model, of the present utility model
Schematic description and description is used for explaining this utility model, is not intended that improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of a kind of flow process of distillation system of the prior art；
Fig. 2 shows the structural representation of the another kind of flow process of distillation system of the prior art；
Fig. 3 shows the structural representation of the embodiment one according to distillation system of the present utility model；
Fig. 4 shows the structural representation of the embodiment two according to distillation system of the present utility model；
Fig. 5 shows the cross-sectional schematic of the first condenser of the distillation system of Fig. 3；
Fig. 6 shows the schematic side view of first condenser of Fig. 5；And
Fig. 7 shows the cross-sectional schematic of the second condenser of the distillation system of Fig. 3.
Wherein, above-mentioned accompanying drawing includes the following drawings labelling:
1 ', rectifying column；2 ', reboiler；11, the first rectifying column；111, the first upper outlet；112, first time outlet；113、
First import；114, the first refluxing opening；115, the first gas returning port；12, Second distillation column；121, the second upper outlet；122、
Second time outlet；123, the second import；124, the second refluxing opening；125, the second gas returning port；21, the first reboiler；211、
First inlet；212, the first gas outlet；213, the first air inlet；214, the first liquid outlet；22, the second reboiler；221、
Second inlet；222, the second gas outlet；223, the second air inlet；224, the second liquid outlet；30, the first condenser；31、
First inlet section；32, the first outlet section；33, the first fan assembly；34, the first cooling tube group；341, the first charging aperture；
342, the second charging aperture；343, the 3rd charging aperture；344, the first discharging opening；345, the second discharging opening；346, the 3rd discharging
Mouthful；35, first liquid distributor；36, the first demister；40, the second condenser；41, the second inlet section；42,
Two outlet sections；43, the second fan assembly；44, the second cooling tube group；441, the 4th charging aperture；442, the 4th discharging opening；
45, second liquid distributor；46, the 3rd cooling tube group；461, the 5th charging aperture；462, the 5th discharging opening；47, second
Demister；48, gas-liquid separation device.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
As it is shown on figure 3, the distillation system of embodiment one is the first flow process (the i.e. upstream rectifying column refining purification for polysilicon
Bottom product as the raw material of downstream rectifying column), this distillation system includes the first rectifying column 11, Second distillation column 12 and
One reboiler 21.Wherein, the first rectifying column 11 has 111, the first time outlet 112 of the first upper outlet and is arranged on first
The first import the 113, first refluxing opening 114 and the first gas returning port 115 between outlet 111 and first time outlet 112.Second essence
Evaporate tower 12 there is 121, the second time outlet 122 of the second upper outlet and be arranged on the second upper outlet 121 and second time outlet 122
Between the second import 123 and the second refluxing opening 124.First reboiler 21 have first inlet the 211, first gas outlet 212,
First air inlet 213 and the first liquid outlet 214.First inlet 211 connects with first time outlet 112.First gas outlet 212
Connect with the first gas returning port 115.First air inlet 213 connects with the second upper outlet 121.First liquid outlet 214 and the second backflow
Mouth 124 connection.First time outlet 112 connects with the second import 123.In the first flow process above-mentioned, the first rectifying column 11
Bottom product enters into Second distillation column 12 as the raw material of Second distillation column 12 by first time outlet the 112, second import 123
In.
The distillation system of application the present embodiment, is connected to the first reboiler 21 on the first rectifying column 11, this first reboiler 21
First time outlet 112 of the first inlet 211 and the first rectifying column 11 connect, the first gas outlet 212 and the first rectifying column 11
The first gas returning port 115 connect.First air inlet 213 of above-mentioned first reboiler 21 and the second upper outlet of Second distillation column 12
121 connections, the first liquid outlet 214 connects with the second refluxing opening 124 of Second distillation column 12.Said structure can make to be connected to
The thermal source of the first reboiler 21 on the first rectifying column 11 is provided by the overhead vapours of Second distillation column 12, so can be abundant
Utilize the energy in distillation system, thus be effectively reduced system energy consumption.
In the distillation system of embodiment one, the first rectifying column 11 is regular packed tower or plate column, theoretical cam curve in the range of
80～100, tower top operation meter pressure in the range of 0.4MPa～0.8MPa, tower top operation temperature in the range of 90 DEG C～115 DEG C,
The mass flowrate ratio of capacity of returns and inlet amount is in the range of 6～10.Second distillation column 12 is regular packed tower, theoretical cam curve
Scope is 100～120, tower top operation meter pressure in the range of 0.15MPa～0.55MPa, tower top operation temperature in the range of
70 DEG C～90 DEG C, the mass flowrate ratio of capacity of returns and inlet amount is in the range of 8～12.First reboiler 21 boils for heat siphon type again
Device, its thermal source is the overhead vapours from Second distillation column 12, and requires the temperature difference of the tower reactor of overhead vapours and the first rectifying column 11
Scope is 10 DEG C～25 DEG C.
As shown in Figure 3 and Figure 5, in the distillation system of embodiment one, distillation system also includes the first condenser 30.Above-mentioned
One condenser 30 includes the first housing, the first fan assembly the 33, first cooling tube group 34 and first liquid distributor 35.Its
In, the bottom of the first housing has the first inlet section 31, and the top of the first housing has the first outlet section 32.In first housing
Portion has the first feed liquor portion.First fan assembly 33 is positioned at the first outlet section 32.First cooling tube group 34 is arranged on the first shell
Internal and between the first inlet section 31 and the first outlet section 32.First liquid distributor 35 is arranged in the first housing, the
One liquid distribution trough 35 between the first outlet section 32 and the first cooling tube group 34 so that liquid is in the first cooling tube group 34
It is uniformly distributed.In the present embodiment, the first outlet section 32 is the air outlet being arranged on case top, and the first fan assembly 33 is
Being arranged on the axial flow blower on above-mentioned air outlet, the first feed liquor portion is the inlet being arranged in the first housing sidewall, this inlet
Connect with first liquid distributor 35.When the first condenser 30 is operated, cooling water enters first by the first feed liquor portion
Liquid distribution trough 35, and be uniformly distributed above the first cooling tube group 34, at the first cooling tube by first liquid distributor 35
Form the thin water film of continuous uniform between the body of group 34, increase cooling water and the contact area of the first cooling tube group 34.On
Take away the heat in the first cooling tube group 34 after stating thin water film evaporation, enhance the first inside and outside heat transfer of cooling tube group 34, thus
Effectively enhance the condensation effect of condenser, reduce energy consumption.
As it is shown in figure 5, in the distillation system of embodiment one, first liquid distributor 35 is trough-tray liquid distributor.Slotted disk
Formula liquid distribution trough belongs to overflow type liquid distributor, and this trough-tray liquid distributor includes chassis and is arranged on above-mentioned chassis
Multiple separating tubes and multiple exhaustor.Wherein, chassis has liquid communication chamber, and multiple separating tubes are evenly distributed on the downside on chassis,
Multiple exhaustors are evenly distributed on the upside on chassis, and above-mentioned multiple separating tubes and multiple exhaustors stagger setting.Each separating tube
Lower end is provided with overflow launder, and the bottom circumferential exterior surface of each separating tube is provided with the flow deflector downwardly extended, and flow deflector
And fit between the edge of overflow launder.When cooling water is distributed by trough-tray liquid distributor, cooling water enters chassis
Liquid communication chamber, and by separating tube uniform distribution to overflow launder.When the cooling water in overflow launder fills with, cooling water can be suitable
The flow deflector overflow launder edge drips downwards, so can realize cooling down water and be distributed more uniformly across.
As shown in Figure 6, in the distillation system of embodiment one, the first cooling tube group 34 includes three cooling coils being independently arranged
Group, three cooling coil groups are arranged side by side in housing in the horizontal direction.Said structure can realize simultaneously different to three kinds things
Material mixture carries out condensation separation.Above three cooling coil group be respectively provided with first charging aperture the 341, second charging aperture 342,
Three charging aperture 343 and first discharging opening the 344, second discharging opening the 345, the 3rd discharging openings 346, wherein, the first charging aperture 341
Corresponding with the first discharging opening 344, the second charging aperture 342 and the second discharging opening 345 are corresponding, the 3rd charging aperture 343 and
Three discharging openings 346 are corresponding.In the present embodiment, the first upper outlet 111 connects with the first refluxing opening 114, second time outlet
122 connect with the first charging aperture 341, and the first upper outlet 111 connects with the second charging aperture 342, the first liquid outlet 214 with
3rd charging aperture 343 connects.
As it is shown in figure 5, in the distillation system of embodiment one, the first condenser 30 condenser also includes the first demister 36.
In first demister 36 is arranged on the first housing and between the first outlet section 32 and first liquid distributor 35.In this reality
Executing in example, the first inlet section 31 is the air-inlet grille being arranged in the first lower housing portion circumferential side wall, and the first demister 36 is
Mesh mist eliminator.When the first condenser 30 is operated, extraneous air enters to the first shell by above-mentioned air-inlet grille from bottom
Internal, and bottom-up flowing, the cooling water in the first housing is uniformly flowed downward by first liquid distributor 35, both
Form adverse current.Air with cooling water evaporate at the first cooling tube group 34 generation steam be mixed into humid air, this humid air to
On flow into mesh mist eliminator, and under the effect of mesh mist eliminator, remove portion of water, finally from the first fan assembly 33 row
Enter air.Said structure can reduce and enters the air of air and carry moisture, reduces the loss of cooling water, has saved the energy.
It should be noted that the first demister 36 is not limited to this, in other embodiments the most unshowned, the first demister
36 can be the demister of other forms.
As it is shown in figure 5, in the distillation system of embodiment one, the first condenser 30 also includes liquid collector and for by liquid collecting
Liquid pumping in device is to the pumping installations at feed liquor portion.Liquid collector is positioned at the lower section of the first cooling tube group 34 and for holding
The cooling water that first housing upper flows down.The inlet of pumping installations connects with liquid collector.The liquid outlet of pumping installations and first
Feed liquor portion connects.In the present embodiment, liquid collector is water tank, and pumping installations is water circulating pump.It is provided with band on above-mentioned water tank
The dividing plate in hole, the cooling water flowed down from housing upper can be entered in water tank by the hole this dividing plate.Permissible by water circulating pump
Cooling water in water tank is extracted out and delivers in first liquid distributor 35, thus for the follow-up cooling to the first cooling tube group 34,
Cooling water inner loop so can be made to utilize, decrease the loss of water, reduce energy expenditure simultaneously.Meanwhile, on water tank also
It is provided with water supplement port and sewage draining exit, water supplement port moisturizing in water tank, or control of sewage disposal mouth can be controlled by the valve on pipeline
Waste water in water tank is drained.
As it is shown in figure 5, in the distillation system of embodiment one, the first condenser 30 is from top to bottom divided into 5 districts, is respectively out
Wind district, liquid collect areal area, cooling zone, air intake district and storage area.When the first condenser 30 is operated, three kinds
Different mixtures of materials enters cooling zone by first charging aperture the 341, second charging aperture the 342, the 3rd charging aperture 343 respectively
Three cooling coil groups cool down, each logistics after cooling respectively by first discharging opening the 344, second discharging opening 345, the
Three discharging openings 346 enter follow-up equipment.Cooling water is extracted out from the water tank of storage area by water circulating pump and is delivered to liquid collection areal area
Trough-tray liquid distributor in, and cooling water is uniformly distributed above cooling zone, thus shape on the body of cooling coil group
Become the thin water film of continuous uniform, utilize the evaporation of above-mentioned thin water film to conduct heat inside and outside enhanced tube.Additionally, rely on the axial flow of wind outlet area
The power of blower fan forms negative pressure in condenser, air by air intake district air-inlet grille enter, and bottom-up flowing with from liquid
Collecting the cooling water formation adverse current that areal area flows down, the steam produced with cooling zone is mixed into humid air, and humid air flows up
Enter after mesh mist eliminator removes part water and enter air from the exhaust outlet of axial flow blower.
As shown in Figure 3 and Figure 7, in the distillation system of embodiment one, distillation system also includes the second condenser 40.Second is cold
Condenser 40 includes that the second housing, second fan assembly the 43, second cooling tube group 44, second liquid distributor 45 and the 3rd are cold
But pipe group 46.Wherein, the bottom of the second housing has the second inlet section 41, and the top of the second housing has the second outlet section 42.
Second fan assembly 43 is positioned at the second outlet section 42.Second cooling tube group 44 is arranged in the second housing and is positioned at the second air intake
Between portion 41 and the second outlet section 42, the second cooling tube group 44 has the 4th charging aperture 441 and the 4th discharging opening 442.Second
Liquid distribution trough 45 is arranged in the second housing, and second liquid distributor 45 is positioned at the second outlet section 42 and the second cooling tube group 44
Between so that liquid is uniformly distributed in the second cooling tube group 44.3rd cooling tube group 46 is arranged in the second housing and is positioned at the
Between two outlet sections 42 and second liquid distributor 45, the 3rd cooling tube group 46 has the 5th charging aperture 461 and the 5th discharging opening
462, the 5th discharging opening 462 connects with the 4th charging aperture 441, and the 5th charging aperture 461 connects with the first upper outlet 111, and the 4th
Discharging opening 442 connects with the first refluxing opening 114 and the second charging aperture 342.Second condenser 40 is main with the first condenser 30
Difference is, the second condenser 40 is additionally arranged the 3rd cooling tube group 46.Above-mentioned 3rd cooling tube group 46 is finned cooling pipe group.
Said structure can carry out precooling treatment to the material entering the second cooling tube group 44, improves condensation effect further.
As it is shown in fig. 7, in the distillation system of embodiment one, the second condenser 40 also includes the second demister 47, and second removes
In mist device 47 is arranged on the second housing and between the second outlet section 42 and second liquid distributor 45.Second demister
47 is mesh mist eliminator.Second inlet section 41 is the air-inlet grille being arranged in the second lower housing portion circumferential side wall.In the second condensation
When device 40 is operated, extraneous air is entered in the second housing from bottom by above-mentioned air-inlet grille, and bottom-up flowing,
Cooling water in second housing is uniformly flowed downward by second liquid distributor 45, and both form adverse current.Air exists with cooling water
The steam that at second cooling tube group 44, evaporation produces is mixed into humid air, and this humid air flows up into mesh mist eliminator, and
Portion of water is removed under the effect of mesh mist eliminator.The air removing portion of water arrives at the 3rd cooling tube group 46 and enters with it
Row heat exchange, it is achieved the material entering the second cooling tube group 44 is carried out precooling treatment.Finally, the air after heat exchange is from the second wind
Thermomechanical components 43 enters air.Said structure can reduce and enters the air of air and carry moisture, reduces the loss of cooling water, joint
The about energy.It should be noted that the second demister 47 is not limited to this, in other embodiments the most unshowned, the
Two demisters 47 can be the demister of other forms.
As it is shown in fig. 7, in the distillation system of embodiment one, the second condenser 40 also includes gas-liquid separation device 48, and gas-liquid is divided
Import from device 48 connects with the 4th discharging opening 442, the liquid outlet of gas-liquid separation device 48 and the first refluxing opening 114 and second
Charging aperture 342 connects.In the present embodiment, gas-liquid separation device 48 is knockout drum.Said structure can be to the 4th discharging
The materials that mouth 442 flows out carry out further gas-liquid separation.
As it is shown in fig. 7, in the distillation system of embodiment one, the second condenser 40 is from top to bottom divided into 7 districts, is respectively out
Wind district, pre-cooling zone, liquid collect areal area, cooling zone, air intake district, storage area and gas-liquid separation zone.When to the second condensation
When device 40 operates, the steam (saturated vapor produced such as rectifying column tower top) that preposition equipment produces initially enters pre-cooling zone
Finned cooling pipe group carries out heat exchange pre-cooling, and the steam after pre-cooling enters back into cooling coil group total condensation and the cooling of cooling zone, cold
Logistics after solidifying cooling enters gas-liquid separation zone, and enters knockout drum.In knockout drum after gas-liquid separation, fixed gas
Being discharged by the gas outlet of knockout drum, condensed fluid enters follow-up equipment by liquid outlet.Cool down water by water circulating pump from water storage
The water tank in district is extracted out and delivers in the trough-tray liquid distributor that liquid collects areal area, and by uniform above cooling zone for cooling water
Distribution, thus on the body of cooling coil group, form the thin water film of continuous uniform, utilize the evaporation of above-mentioned thin water film with enhanced tube
Inside and outside heat transfer.Additionally, rely on the power of the axial flow blower of wind outlet area to form negative pressure in condenser, air is by the air intake in air intake district
Grid enters, and bottom-up flowing collects the cooling water formation adverse current that areal area flows down, the water produced with cooling zone with from liquid
Steam is mixed into humid air, and humid air flows up into after mesh mist eliminator removes part water, arrives at the 3rd cooling tube group 46
And heat exchange is carried out with it, finally enter air from the exhaust outlet of axial flow blower.
As it is shown on figure 3, in the distillation system of embodiment one, the first liquid outlet 214 and Second distillation column of the first reboiler 21
It is provided with surge tank, the first rectifying column 11 between second refluxing opening 124 and the 3rd charging aperture 343 of the first condenser 30 of 12
The first upper outlet 111 and the first refluxing opening 114 and the second charging aperture 342 of the first condenser 30 between be again provided with buffering
Tank.
As it is shown on figure 3, in the distillation system of embodiment one, the workflow of distillation system is:
Treat that the refined material 500 that purifies enters from middle and lower part first import 113 of the first rectifying column 11 from what preceding processes came, first
The overhead vapours 501 of rectifying column 11 enters the second condenser 40 and carries out condensation cooling, and the condensed fluid 502 after cooling enters surge tank
After be divided into two-way, a road as backflow 503 from the top of the first rectifying column 11 enter, another road is discharged as low-boiling-point substance 504.
The tower reactor liquid 505 of the first rectifying column 11 enters from the second import 123 of Second distillation column 12 middle and upper part.Second distillation column 12
Overhead vapours 506 enter the first reboiler 21 shell side for heating the tower reactor liquid of the first rectifying column 11, condensed tower top steams
Vapour 507 enters surge tank, from surge tank discharge condensed fluid 508 be divided into two-way, a road as backflow 509 from the second rectification
The top of tower 12 enters, and another road is discharged as low-boiling-point substance 510.The product 511, above-mentioned discharged from Second distillation column 12 tower reactor
Low-boiling-point substance 504 and above-mentioned low-boiling-point substance 510 enter from three cooling coil groups of the first condenser 30 respectively and cool down, cooling
After low-boiling-point substance 512, product 513 and low-boiling-point substance 514 enter subsequent handling.Wherein, treat that the refined material 500 that purifies can be two
Chlorine dihydro silicon, trichlorosilane or Silicon chloride..
As shown in Figure 4, the distillation system of embodiment two is the second flow process (the i.e. upstream rectifying column refining purification for polysilicon
Overhead product as the raw material of downstream rectifying column), this distillation system includes the first rectifying column 11, Second distillation column 12 and
Two reboilers 22.Wherein, the first rectifying column 11 has 111, the first time outlet 112 of the first upper outlet and is arranged on first
The first import 113 and the first refluxing opening 114 between outlet 111 and first time outlet 112.Second distillation column 12 has second
Upper outlet exports 122 for 121, second time and is arranged on the second import between the second upper outlet 121 and second time outlet 122
123, the second refluxing opening 124 and the second gas returning port 125.Second reboiler 22 have second inlet the 221, second gas outlet 222,
Second air inlet 223 and the second liquid outlet 224, the second inlet 221 connects with second time outlet 122, the second gas outlet
222 connect with the second gas returning port 125.Second air inlet 223 connects with the first upper outlet 111, the second liquid outlet 224 and first
Refluxing opening 114 connects with the second import 123.In above-mentioned the second flow process, the overhead product first conduct of the first rectifying column 11
The thermal source of the second reboiler 22 on Second distillation column 12 carries out heat exchange, and the raw material being re-used as Second distillation column 12 goes out by second
The 224, second import 123 of liquid mouth enters in Second distillation column 12, so can make full use of the energy in distillation system, from
And it is effectively reduced system energy consumption.
In the distillation system of embodiment two, the first rectifying column 11 is regular packed tower or plate column, theoretical cam curve in the range of
80～100, tower top operation meter pressure in the range of 0.4MPa～0.8MPa, tower top operation temperature in the range of 90 DEG C～115 DEG C,
The mass flowrate ratio of capacity of returns and inlet amount is in the range of 6～10.Second distillation column 12 is regular packed tower, theoretical cam curve
Scope is 100～120, tower top operation meter pressure in the range of 0.15MPa～0.55MPa, tower top operation temperature in the range of
70 DEG C～90 DEG C, the mass flowrate ratio of capacity of returns and inlet amount is in the range of 8～12.Second reboiler 22 boils for heat siphon type again
Device, its thermal source is the overhead vapours from the first rectifying column 11, and requires the temperature difference of overhead vapours and the tower reactor of Second distillation column 12
Scope is 10 DEG C～25 DEG C.
As shown in Figure 4, in the distillation system of embodiment two, distillation system also includes the first condenser 30.The of the present embodiment
Differring primarily in that of first condenser 30 of one condenser 30 and embodiment one, the second upper outlet 121 and the second refluxing opening 124
Connection, second time outlet 122 connects with the first charging aperture 341, and the second upper outlet 121 connects with the 3rd charging aperture 343,
First time outlet 112 connects with the second charging aperture 342.Other structures of above-mentioned first condenser 30 and operation principle and embodiment
One identical, do not repeat them here.
As shown in Figure 4, in the distillation system of embodiment two, distillation system also includes the second condenser 40.The of the present embodiment
Differring primarily in that of second condenser 40 of two condensers 40 and embodiment one, the 5th charging aperture 461 and the second upper outlet 121
Connection, the 4th discharging opening 442 connects with the second refluxing opening 124 and the 3rd charging aperture 343.Above-mentioned second condenser 40 also includes
Gas-liquid separation device 48, the import of gas-liquid separation device 48 connects with the 4th discharging opening 442, gas-liquid separation device 48 go out liquid
Mouth connects with the second refluxing opening 124 and the 3rd charging aperture 343.Other structures of above-mentioned second condenser 40 and operation principle and reality
Execute the identical of example one, do not repeat them here.
As shown in Figure 4, in the distillation system of embodiment two, the second liquid outlet 224 and the first rectifying column of the second reboiler 22
It is additionally provided with surge tank, Second distillation column 12 between first refluxing opening 114 and second import 123 of Second distillation column 12 of 11
The second upper outlet 121 and the second refluxing opening 124 and the 3rd charging aperture 343 of the first condenser 30 between be again provided with buffering
Tank.
As shown in Figure 4, in the distillation system of embodiment two, the workflow of distillation system is:
Treat that the refined material 600 that purifies enters from middle and lower part first import 113 of the first rectifying column 11 from what preceding processes came, first
The overhead vapours 601 of rectifying column 11 enters the second reboiler 22 shell side for heating the tower reactor liquid of Second distillation column 12, condensation
After overhead vapours 602 enter surge tank, from surge tank discharge condensed fluid 603 be divided into two-way, a road is as backflow 604
Entering from the top of the first rectifying column 11, another road condensed fluid 605 enters from the second import 123 of Second distillation column 12 middle and upper part.
The overhead vapours 606 of Second distillation column 12 enters the second condenser 40 and carries out condensation cooling, and the condensed fluid 607 after cooling enters
Being divided into two-way after surge tank, a road enters from the top of Second distillation column 12 as backflow 608, and another road is as low-boiling-point substance 609
Discharge.From first rectifying column 11 tower reactor discharge high-boiling components 611, from Second distillation column 12 tower reactor discharge product 610 and
State low-boiling-point substance 609 to enter from three cooling coil groups of the first condenser 30 respectively and cool down, low-boiling-point substance 612 after cooling,
Product 613 and high-boiling components 614 enter subsequent handling.Wherein, treat that the refined material 600 that purifies can be dichlorosilane, trichlorine
Hydrogen silicon or Silicon chloride..
As can be seen from the above description, this utility model the above embodiments achieve following technique effect:
The distillation system of the application is applied to that polysilicon is refined to be purified, the reboiler on making to be connected in multiple rectifying column
Thermal source is provided by another the overhead product (such as overhead vapours) in multiple rectifying columns, so can make full use of rectification
The energy in system, thus it is effectively reduced system energy consumption.
Additionally, the first condenser and the second condenser after improving are applied in distillation system, decrease the consumption of water, subtract
Lack energy consumption, and condensed by above-mentioned first condenser overhead vapours, high-boiling components, product and low-boiling-point substance and cool down, with
Existing distillation system is compared, and reduces energy expenditure more than 50%.
The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this area
For technical staff, this utility model can have various modifications and variations.All within spirit of the present utility model and principle, institute
Any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. a distillation system, it is characterised in that including:
Multiple rectifying columns, have upper outlet, lower outlet and are arranged on the backflow between described upper outlet, described lower outlet
Mouth and gas returning port；
Reboiler, has inlet, gas outlet, air inlet and liquid outlet, described inlet and multiple described rectifying columns
In the described lower outlet of, described gas outlet connects with the described gas returning port of this rectifying column, described air inlet with
Another described upper outlet connection in multiple described rectifying columns, described liquid outlet connects with the described refluxing opening of this rectifying column
Logical.
Distillation system the most according to claim 1, it is characterised in that described rectifying column includes:
First rectifying column (11), has the first upper outlet (111), first time outlet (112) and is arranged on described the
The first import (113) between one upper outlet (111) and described first time outlet (112), the first refluxing opening (114)
With the first gas returning port (115)；
Second distillation column (12), has the second upper outlet (121), second time outlet (122) and is arranged on described
The second import (123) between second upper outlet (121) and described second time outlet (122) and the second refluxing opening (124)；
Described reboiler includes:
First reboiler (21), has the first inlet (211), the first gas outlet (212), the first air inlet (213)
And first liquid outlet (214), described first inlet (211) connects with described first time outlet (112), described
First gas outlet (212) connects with described first gas returning port (115)；
Wherein, described first air inlet (213) connects with described second upper outlet (121), described first liquid outlet (214)
Connecting with described second refluxing opening (124), described first time outlet (112) connects with described second import (123).
Distillation system the most according to claim 1, it is characterised in that described rectifying column includes:
First rectifying column (11), has the first upper outlet (111), first time outlet (112) and is arranged on described the
The first import (113) between one upper outlet (111) and described first time outlet (112) and the first refluxing opening (114)；
Second distillation column (12), has the second upper outlet (121), second time outlet (122) and is arranged on described
The second import (123) between second upper outlet (121) and described second time outlet (122), the second refluxing opening (124)
With the second gas returning port (125)；
Described reboiler includes:
Second reboiler (22), has the second inlet (221), the second gas outlet (222), the second air inlet (223)
And second liquid outlet (224), described second inlet (221) connects with described second time outlet (122), described
Second gas outlet (222) connects with described second gas returning port (125)；
Wherein, described second air inlet (223) connects with described first upper outlet (111), described second liquid outlet (224)
Connect with described first refluxing opening (114) and described second import (123).
Distillation system the most according to claim 2, it is characterised in that described distillation system also includes the first condenser (30),
Described first condenser (30) including:
First housing, the bottom of described first housing has the first inlet section (31), and the top of described first housing has
First outlet section (32)；
First fan assembly (33), is positioned at described first outlet section (32) place；
First cooling tube group (34), is arranged in described first housing and is positioned at described first inlet section (31) and described
Between first outlet section (32), described first cooling tube group (34) has the first charging aperture (341), the second charging aperture
(342), the 3rd charging aperture (343) and the first discharging opening (344), the second discharging opening (345), the 3rd discharging
Mouth (346), described second time outlet (122) connects with described first charging aperture (341)；
First liquid distributor (35), is arranged in described first housing, and described first liquid distributor (35) is positioned at
So that liquid is in described first cooling tube group (34) between described first outlet section (32) and described first cooling tube group (34)
On be uniformly distributed.
Distillation system the most according to claim 4, it is characterised in that described first upper outlet (111) and described first backflow
Mouth (114) connects, and described first upper outlet (111) connects with described second charging aperture (342), and described first
Liquid outlet (214) connects with described 3rd charging aperture (343).
Distillation system the most according to claim 5, it is characterised in that described distillation system also includes the second condenser (40),
Described second condenser (40) including:
Second housing, the bottom of described second housing has the second inlet section (41), and the top of described second housing has
Second outlet section (42)；
Second fan assembly (43), is positioned at described second outlet section (42) place；
Second cooling tube group (44), is arranged in described second housing and is positioned at described second inlet section (41) and described
Between second outlet section (42), described second cooling tube group (44) has the 4th charging aperture (441) and the 4th discharging opening
(442)；
Second liquid distributor (45), is arranged in described second housing, and described second liquid distributor (45) is positioned at
So that liquid is in described second cooling tube group (44) between described second outlet section (42) and described second cooling tube group (44)
On be uniformly distributed；
3rd cooling tube group (46), described 3rd cooling tube group (46) is arranged in described second housing and is positioned at described
Between second outlet section (42) and described second liquid distributor (45), described 3rd cooling tube group (46) has
Five charging apertures (461) and the 5th discharging opening (462), described 5th discharging opening (462) and described 4th charging aperture (441)
Connection, described 5th charging aperture (461) connects with described first upper outlet (111), described 4th discharging opening (442)
Connect with described first refluxing opening (114) and described second charging aperture (342).
Distillation system the most according to claim 3, it is characterised in that described distillation system also includes the first condenser (30),
Described first condenser (30) including:
First housing, the bottom of described first housing has the first inlet section (31), and the top of described first housing has
First outlet section (32)；
First fan assembly (33), is positioned at described first outlet section (32) place；
First cooling tube group (34), is arranged in described first housing and is positioned at described first inlet section (31) and described
Between first outlet section (32), described first cooling tube group (34) has the first charging aperture (341), the second charging aperture
(342), the 3rd charging aperture (343) and the first discharging opening (344), the second discharging opening (345), the 3rd discharging
Mouth (346), described second time outlet (122) connects with described first charging aperture (341)；
First liquid distributor (35), is arranged in described first housing, and described first liquid distributor (35) is positioned at
So that liquid is in described first cooling tube group (34) between described first outlet section (32) and described first cooling tube group (34)
On be uniformly distributed.
Distillation system the most according to claim 7, it is characterised in that described second upper outlet (121) and described second backflow
Mouth (124) connects, and described second upper outlet (121) connects with described 3rd charging aperture (343), and described first
Lower outlet (112) connects with described second charging aperture (342).
Distillation system the most according to claim 8, it is characterised in that described distillation system also includes the second condenser (40),
Described second condenser (40) including:
Second housing, the bottom of described second housing has the second inlet section (41), and the top of described second housing has
Second outlet section (42)；
Second fan assembly (43), is positioned at described second outlet section (42) place；
Second cooling tube group (44), is arranged in described second housing and is positioned at described second inlet section (41) and described
Between second outlet section (42), described second cooling tube group (44) has the 4th charging aperture (441) and the 4th discharging opening
(442)；
Second liquid distributor (45), is arranged in described second housing, and described second liquid distributor (45) is positioned at
So that liquid is in described second cooling tube group (44) between described second outlet section (42) and described second cooling tube group (44)
On be uniformly distributed；
3rd cooling tube group (46), described 3rd cooling tube group (46) is arranged in described second housing and is positioned at described
Between second outlet section (42) and described second liquid distributor (45), described 3rd cooling tube group (46) has
Five charging apertures (461) and the 5th discharging opening (462), described 5th discharging opening (462) and described 4th charging aperture (441)
Connection, described 5th charging aperture (461) connects with described second upper outlet (121), described 4th discharging opening (442)
Connect with described second refluxing opening (124) and described 3rd charging aperture (343).
10. according to the distillation system described in claim 4 or 7, it is characterised in that described first condenser (30) also includes first
Demister (36), described first demister (36) is arranged in described first housing and is positioned at described first outlet section
(32) and between described first liquid distributor (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620045975.0U CN205461092U (en) | 2016-01-18 | 2016-01-18 | Rectification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620045975.0U CN205461092U (en) | 2016-01-18 | 2016-01-18 | Rectification system |
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| Publication Number | Publication Date |
|---|---|
| CN205461092U true CN205461092U (en) | 2016-08-17 |
Family
ID=56670952
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620045975.0U Active CN205461092U (en) | 2016-01-18 | 2016-01-18 | Rectification system |
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| CN (1) | CN205461092U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413221A (en) * | 2016-01-18 | 2016-03-23 | 中国恩菲工程技术有限公司 | Rectifying system |
| CN108603125A (en) * | 2016-09-13 | 2018-09-28 | 株式会社Lg化学 | Selective distillation equipment and distillating method |
| CN110282655A (en) * | 2019-08-08 | 2019-09-27 | 中国恩菲工程技术有限公司 | Titanium tetrachloride rectificating method |
-
2016
- 2016-01-18 CN CN201620045975.0U patent/CN205461092U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105413221A (en) * | 2016-01-18 | 2016-03-23 | 中国恩菲工程技术有限公司 | Rectifying system |
| CN108603125A (en) * | 2016-09-13 | 2018-09-28 | 株式会社Lg化学 | Selective distillation equipment and distillating method |
| CN108603125B (en) * | 2016-09-13 | 2020-07-24 | 株式会社Lg化学 | Selective distillation apparatus and distillation method |
| CN110282655A (en) * | 2019-08-08 | 2019-09-27 | 中国恩菲工程技术有限公司 | Titanium tetrachloride rectificating method |
| CN110282655B (en) * | 2019-08-08 | 2021-12-03 | 中国恩菲工程技术有限公司 | Titanium tetrachloride rectification method |
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