CN206666416U - Piece-rate system for low carbon mixed alcohol - Google Patents
Piece-rate system for low carbon mixed alcohol Download PDFInfo
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- CN206666416U CN206666416U CN201720452690.3U CN201720452690U CN206666416U CN 206666416 U CN206666416 U CN 206666416U CN 201720452690 U CN201720452690 U CN 201720452690U CN 206666416 U CN206666416 U CN 206666416U
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Abstract
The utility model discloses a kind of piece-rate system for low carbon mixed alcohol, belong to mixed alcohol technical field of rectification.The piece-rate system includes being used for the dehydration device to low carbon mixed alcohol dehydration, the rectifier unit for carrying out the low carbon mixed alcohol double-effect rectification and the kinetic-control system for controlling the rectifier unit, the rectifier unit includes the methanol rectifying tower being connected to each other and the dividing wall column to being fractionated by the low carbon mixed alcohol after methanol rectifying tower purification methanol, and the kinetic-control system is connected to each other with the dividing wall column.Piece-rate system provided by the utility model for low carbon mixed alcohol separates low carbon mixed alcohol using dividing wall column by the way of double-effect rectification technology is combined, can not only ensure in low carbon mixed alcohol it is separated go out single methanol purity, and energy-saving efficiency can improve 20%, and tower can be effectively saved relative to multitower separation, reduce cost of investment.
Description
Technical field
It the utility model is related to mixed alcohol technical field of rectification, the more particularly to piece-rate system for low carbon mixed alcohol.
Background technology
Low-carbon alcohols are a kind of good clean energy resourcies, have a higher octane number, therefore still a kind of very promising are replaced
Replacing fuel.Low carbon mixed alcohol is the intermediate of numerous chemical products, but aqueous low carbon mixed alcohol is separated into single alcohols is
It is extremely difficult, therefore the generally use multitower isolation technics when separating low carbon mixed alcohol, by the alcohols in low carbon mixed alcohol by
One is separated, and traditionally needs to use multiple rectifying columns to realize the separation of low carbon mixed alcohol, so that point
From cost of investment and the production cost increase of low carbon mixed alcohol, and constrain its industrial development.
Utility model content
In order to solve at least one aspect of the above-mentioned problems in the prior art and defect, the utility model provides
A kind of piece-rate system for low carbon mixed alcohol.The technical scheme is as follows：
A purpose of the present utility model there is provided a kind of piece-rate system for low carbon mixed alcohol.
According to one side of the present utility model, there is provided a kind of piece-rate system for low carbon mixed alcohol, wherein, it is described
Piece-rate system is included for the dehydration device to low carbon mixed alcohol dehydration, for carrying out double-effect rectification to the low carbon mixed alcohol
Rectifier unit and the kinetic-control system for controlling the rectifier unit, the rectifier unit include the methanol essence being connected to each other
Evaporate tower and the dividing wall column to being fractionated by the low carbon mixed alcohol after methanol rectifying tower purification methanol, the dynamic control
System processed is connected to each other with the dividing wall column.
Specifically, the methanol rectifying tower includes being used for the first that the low carbon mixed alcohol after being dehydrated enters the methanol rectifying tower
Alcohol rectifying column charging aperture, methanol rectification column overhead discharging opening and methanol rectifying tower bottom of towe discharging opening, the methanol rectification column overhead
Discharging opening is connected with methanol tank,
The dividing wall column, which includes being used for purifying the low carbon mixed alcohol after methanol, enters the divided wall rectifying
The dividing wall column charging aperture of tower, dividing wall column tower top discharging opening, dividing wall column bottom of towe discharging opening and
Dividing wall column side line discharge, the dividing wall column tower top discharging opening are connected with ethanol storage tank, the separation
Wall type rectifying tower bottom discharging opening is connected with butanol storage tank, and the dividing wall column side line discharge connects with propyl alcohol storage tank
Connect.
Further, the rectifier unit also includes the first reboiler, the second reboiler and preheater, and described first boils again
Device includes first entrance, second entrance, first outlet and second outlet, first entrance and the methanol of first reboiler
The discharging opening connection of rectifying tower bottom, the first outlet of first reboiler are connected with the entrance of the preheater, the preheating
The outlet of device is connected with the dividing wall column charging aperture,
The second entrance of first reboiler is connected with the dividing wall column tower top discharging opening, and described first again
The second outlet of boiling device is connected with the ethanol storage tank.
Specifically, the methanol rectification column overhead discharge outlet is provided with complete condenser, the entrance of the complete condenser and institute
The connection of methanol rectification column overhead discharging opening is stated, the outlet of the complete condenser is connected with the methanol tank；
The methanol rectifying tower also includes the first reflux inlet and the second reflux inlet, and the dividing wall column also wraps
The first reflux inlet and the second reflux inlet are included, methanol is provided between the outlet of the complete condenser and the methanol tank and is returned
Tank is flowed, the methanol eddy tank includes return tank entrance, the outlet of the first return tank and gone out for the second return tank of methanol eddy
Mouthful, the return tank entrance of the methanol eddy tank is connected with the outlet of the complete condenser, the first backflow of the methanol eddy tank
Tank outlet is connected with the methanol tank, the second return tank outlet and the first of the methanol rectifying tower of the methanol eddy tank
Reflux inlet connects；
Alcohol reflux tank is provided between first reboiler and the ethanol storage tank, the alcohol reflux tank includes
Return tank entrance, the outlet of the first return tank and the outlet of the second return tank, the return tank entrance of the alcohol reflux tank and described the
The second outlet connection of one reboiler, the first return tank outlet of the alcohol reflux tank is connected with the ethanol storage tank, described
Second bypass outlet of alcohol reflux tank is connected with the first reflux inlet of the dividing wall column.
Specifically, it is additionally provided with second reboiler in the dividing wall column bottom of towe discharge outlet, described point
Partition wall type rectifying tower bottom discharging opening is connected with the entrance of second reboiler and the butanol storage tank respectively, and described second again
The outlet of boiling device is connected with the second reflux inlet of the dividing wall column,
Opposing steam flow tank is provided with the first outlet of first reboiler, the opposing steam flow tank includes return tank
Entrance, the outlet of the first return tank and the outlet of the second return tank, the return tank entrance of the opposing steam flow tank boil again with described first
The first outlet connection of device, the first return tank outlet of the opposing steam flow tank are connected with the entrance of the preheater, the steaming
The second return tank outlet of vapour return tank is connected with the second reflux inlet of the methanol rectifying tower.
Specifically, the kinetic-control system includes multiple pi controllers, the multiple pi controller
It is separately positioned on the dividing wall column tower top discharging opening, dividing wall column side line discharge, divided wall rectifying
At tower bottom of towe discharging opening and the second reboiler.
Preferably, the multiple pi controller includes multiple purity detectors, multiple purity controlers, charging inspection
Survey device, the first feed controller, the second feed controller, fluid level controller, the first liquid level detector, the second liquid level detector,
Pressure controller and pressure detector,
The multiple purity detector and multiple purity controlers correspond setting, and the multiple purity detecting each other
Device and multiple purity controlers are separately positioned at the ethanol storage tank, propyl alcohol storage tank and butanol storage tank,
The charging detector and the first feed controller are arranged at the dividing wall column charging aperture,
First liquid level detector and fluid level controller are arranged at the alcohol reflux tank,
Second feed controller and the second fluid level controller are arranged at second reboiler and divided wall essence
Between evaporating tower,
The pressure controller and pressure detector are arranged at the dividing wall column tower top discharge outlet.
Specifically, the dehydration device includes separator, dehydrating tower, regenerator, heater, condenser and mixed alcohol storage
Tank, the molecular sieve to low carbon mixed alcohol dehydration is provided with the dehydrating tower and regenerator,
The entrance of the dehydrating tower is connected with the outlet of the separator and the entrance of the condenser respectively, the dehydration
Outlet of the outlet of tower respectively with the entrance and the heater of the mixed alcohol storage tank is connected, the outlet of the mixed alcohol storage tank
It is connected with the methanol rectifying tower charging aperture,
The entrance of the regenerator is connected with the outlet of the heater and the entrance of the mixed alcohol storage tank respectively, described
Outlet of the outlet of regenerator respectively with the entrance and separator of the condenser is connected.
Piece-rate system provided by the utility model for low carbon mixed alcohol at least possesses one in advantages below：
(1) piece-rate system provided by the utility model for low carbon mixed alcohol uses dividing wall column and economic benefits and social benefits
The mode that distillation technology is combined separates low carbon mixed alcohol, can not only ensure in low carbon mixed alcohol it is separated go out single methanol it is pure
Degree, and energy-saving efficiency can improve 20%；
(2) piece-rate system provided by the utility model for low carbon mixed alcohol using two tower periodical operations dehydration,
Double-effect rectification technology and kinetic-control system are controlled to dividing wall column, product flow and composition fluctuation ±
In the case of 5%, the purity of each single methanol can recover desired value, and setting by kinetic-control system at about 5 hours or so
Meter can also solve the problems, such as that dividing wall column separation low carbon mixed alcohol is whard to control；
(3) piece-rate system provided by the utility model for low carbon mixed alcohol can solve the problem that single methanol is not readily separated, and
Relative to multitower isolation technics, the water that azeotropic mixture is formed with alcohol can be first passed through to dehydration device removing, thus, it is possible to reduce behaviour
Make difficulty, simultaneously because using double-effect rectification technology, further effectively save tower so that cost of investment reduces；
(4) piece-rate system provided by the utility model for low carbon mixed alcohol controls three lines using kinetic-control system
Product (i.e. ethanol, propyl alcohol and butanol) purity, and and the pressure of primary distillation tower is set into kinetic-control system, make result more
Close to truth.
Brief description of the drawings
Fig. 1 is the structural representation according to the piece-rate system for low carbon mixed alcohol of one embodiment of the present utility model
Figure；
Fig. 2 is the structural representation of the kinetic-control system control dividing wall column of the piece-rate system according to Fig. 1
Figure；
Fig. 3 is the flow chart using the method for the piece-rate system for low carbon mixed alcohol shown in Fig. 1.
100 piece-rate systems, 11 separators, the entrance of 111 separators, the outlet of 112 separators, the bottom of towe of 113 separators
Outlet, 12 dehydrating towers, the entrance of 121 dehydrating towers, the outlet of 122 dehydrating towers, 124 first pipelines, 125 second pipelines, 126 the 3rd
Pipeline, 127 the 4th pipelines, 13 regenerators, the entrance of 131 regenerators, the outlet of 132 regenerators, 133 the 5th pipelines, 134 the 6th
Pipeline, 135 the 7th pipelines, 136 the 8th pipelines, 14 heaters, 15 condensers, 16 mixed alcohol storage tanks, 21 methanol rectifying towers, 211
Methanol rectifying tower charging aperture, 212 methanol rectification column overhead discharging openings, 213 methanol rectifying tower bottom of towe discharging openings, 215 complete condensers,
First reflux inlet of 216 methanol rectifying towers, the second reflux inlet of 217 methanol rectifying towers, 22 dividing wall columns, 221
Dividing wall column charging aperture, 222 dividing wall column tower top discharging openings, 223 dividing wall column bottom of towe discharging openings,
224 dividing wall column side line discharges, the first reflux inlet of 225 dividing wall columns, 226 dividing wall columns
The second reflux inlet, 228 dividing plates, 23 methanol tanks, 24 ethanol storage tanks, 25 butanol storage tanks, 26 propyl alcohol storage tanks, 27 first boil again
Device, the first entrance of 271 first reboilers, the second entrance of 272 first reboilers, the first outlet of 273 first reboilers,
The second outlet of 274 first reboilers, 28 second reboilers, the entrance of 281 second reboilers, the outlet of 282 second reboilers,
283 medium inlets, 284 media outlets, 29 preheaters, 41 purity detectors, 42 purity controlers, 43 charging detectors, 441 the
One feed controller, 442 second feed controllers, 45 fluid level controllers, 461 first liquid level detectors, 462 second level sensings
Device, 47 pressure detectors, 48 pressure controllers, 50 methanol eddy tanks, the return tank entrance of 51 methanol eddy tanks, 52 methanol eddies
The first return tank outlet of tank, the second return tank outlet of 53 methanol eddy tanks, 60 alcohol reflux tanks, 61 alcohol reflux tanks return
Flow tank entrance, the first return tank outlet of 62 alcohol reflux tanks, the second return tank outlet of 63 alcohol reflux tanks, 90 opposing steam flows
Tank, the return tank entrance of 91 opposing steam flow tanks, the first return tank outlet of 92 opposing steam flow tanks, second time of 93 opposing steam flow tanks
Flow tank outlet.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
Referring to Fig. 1, it illustrates the piece-rate system 100 for low carbon mixed alcohol of one embodiment of the present utility model.
With reference to shown in Fig. 2, piece-rate system 100 is included for the dehydration device to low carbon mixed alcohol dehydration, for entering to low carbon mixed alcohol
The rectifier unit of row double-effect rectification and the kinetic-control system for controlling rectifier unit, rectifier unit include the first being connected to each other
Alcohol rectifying column 21 and the dividing wall column 22 being fractionated to purifying the low carbon mixed alcohol after methanol by methanol rectifying tower 21, dynamic
Control system is connected to each other with dividing wall column 22.In an example of the present utility model, low carbon mixed alcohol is aqueous
Mixed alcohol (water content i.e. in the low carbon mixed alcohol is 5%-8%).In another example of the present utility model, low carbon mixed alcohol
, certainly it will be understood by those skilled in the art that can be with low carbon mixed alcohol including water, methanol, ethanol, normal propyl alcohol and n-butanol
Including the materials such as isopropanol, isobutanol, when being mixed with such as isopropanol, isobutanol etc. material in low carbon mixed alcohol, Ke Yi
Tower top discharging opening, bottom of towe discharging opening and side line discharge (as detailed below) place of dividing wall column 22 set UF membrane to fill
Put.In an also example of the present utility model, piece-rate system 100 can be also used for the synthesis gas to such as Cu-Co bases catalyst
Separated, single methanol is obtained with this.
As shown in figure 1, dehydration device includes separator 11, dehydrating tower 12, regenerator 13, heater 14, the and of condenser 15
Mixed alcohol storage tank 16.Dehydrating tower 12 and regenerator 13 are completely identical in structure two devices, and in dehydrating tower 12 and regenerator
A certain amount of molecular sieve (not shown) to low carbon mixed alcohol dehydration is provided with 13.Because 3A types molecular sieve has well
Dehydration-type, rate of water absorption is larger, is more than 3 × 10 to alkanol molecule diameter-10M Molecular Adsorption amount is small, therefore can be used as dehydration
Adsorption dehydrating agent in tower 12 and regenerator 13.
With continued reference to Fig. 1, the entrance 121 of dehydrating tower 12 respectively with the outlet 112 of separator 11 and the entrance of condenser 15
(being shown by arrow, the direction that arrow enters condenser is entrance, and the direction that arrow leaves condenser is outlet) connection, dehydrating tower
Outlet of the outlet 122 respectively with the entrance and heater 14 of mixed alcohol storage tank 16 be connected, the outlet of mixed alcohol storage tank 16 and first
The connection (as detailed below) of alcohol rectifying column charging aperture, the outlet with heater 14 and the mixed alcohol storage respectively of entrance 131 of regenerator 13
The entrance connection of tank 16, the outlet 112 of the outlet 132 of regenerator 13 respectively with the entrance and separator 11 of condenser 15 are connected.
In an example of the present utility model, the heat exchange mode of dehydrating tower and regenerator changes for shell and tube or coiled
Heat, and dehydrating tower and regenerator use periodical operation, such as using 2h as the cycle.I.e. ought a wherein tower and material liquid it is (i.e. aqueous
Low carbon mixed alcohol) connection adsorption dewatering when, another tower, which is then heated by the heaters, carries out molecular sieve desorption and regeneration, during by the cycle
Between after, switch valve, material liquid is connected with another tower, property performance period operation, obtained after dehydration product (i.e. be dehydrated after
Mixed alcohol) flow into mixed alcohol storage tank, and heated tower is after certain temperature (such as 100 DEG C~120 DEG C) is heated to, and makes point
Absorbate (a large amount of water and a small amount of alcohol) on son sieve becomes gas phase and enters condenser, and condenses to certain temperature within the condenser
After discharge.
Specifically, the tower top of dehydrating tower 12 is provided with the first pipeline 124 and the second pipeline 125, in the He of the first pipeline 124
Be provided with valve on second pipeline 125, the both ends of the first pipeline 124 respectively with the entrance 121 of dehydrating tower and going out for separator
Mouth 112 is connected, and the both ends of the second pipeline 125 are connected with the entrance 121 of dehydrating tower and the entrance of condenser 15 respectively.In dehydrating tower
12 bottom of towe is additionally provided with the 3rd pipeline 126 and the 4th pipeline 127, is provided with the 3rd pipeline 126 and the 4th pipeline 127
Valve, the both ends of the 3rd pipeline 126 are connected with the outlet 122 of dehydrating tower and the entrance of mixed alcohol storage tank 16 respectively, the 4th pipeline
127 both ends are connected with the outlet 122 of dehydrating tower and the outlet of heater 14 respectively.
The tower top of regenerator 13 is provided with the 5th pipeline 133 and the 6th pipeline 134, in the 5th pipeline 133 and the 6th pipe
Valve is provided with line 134, the both ends of the 5th pipeline 133 connect with the outlet 132 of regenerator and the entrance of condenser 15 respectively
Connect, the both ends of the 6th pipeline 134 are connected with the outlet 132 of regenerator and the outlet 112 of separator respectively.In the tower of regenerator 13
Bottom is provided with the 7th pipeline 135 and the 8th pipeline 136, and valve is provided with the 7th pipeline 135 and the 8th pipeline 136, the
Outlet of the both ends of seven pipelines 135 respectively with the entrance 131 and heater 14 of regenerator is connected, the both ends point of the 8th pipeline 136
It is not connected with the entrance 131 of regenerator and the entrance of mixed alcohol storage tank 16.
With reference to shown in Fig. 3, when in use, aqueous low carbon mixed alcohol enters separator 11 by the entrance 111 of separator,
Particulate matter is removed in separator 11, the particulate matter removed is discharged from the bottom of towe outlet 113 of separator 11, afterwards except degranulation
The low carbon mixed alcohol of thing flows out from the outlet 112 at the tower top of separator 11.Now the first pipeline 124 and the 3rd of dehydrating tower 12
Valve on pipeline 126 is open mode, and the valve on the second pipeline 125 and the 4th pipeline 127 is closed mode, regenerator
Valve on 13 the 5th pipeline 133 and the 7th pipeline 135 is the valve of open mode, the 6th pipeline 134 and the 8th pipeline 136
For closed mode.
Low carbon mixed alcohol from separator 11 is flowed into dehydrating tower 12 from entrance 121 of first pipeline 124 through dehydrating tower,
By molecular sieve dehydration, it is flow to by outlet 122 of the low carbon mixed alcohol of molecular sieve dehydration through dehydrating tower from the 3rd pipeline 126 mixed
Close in alcohol storage tank 16.Liquid (such as water) in heater 14 is thermally formed regeneration gas by heater 14 and (such as steamed
Vapour), regeneration gas enters in regenerator 13 from entrance 131 of the 7th pipeline 135 through regenerator to be heated to regenerator, when regenerator 13
When being heated to predetermined temperature (such as 100 DEG C~120 DEG C), the aqueous water in the molecular sieve of regenerator 13, which is heated, forms steaming
Vapour, afterwards outlet 132 of the steam through regenerator are flow in condenser 15 from the 5th pipeline 133, thus achieve regenerator 13
In molecular sieve desorption and regeneration, the steam in the condenser 15 is condensed to form liquid and eductor condenser 15.
When the molecular sieve saturation in dehydrating tower 12, by the valve at the first pipeline 124 of the dehydrating tower and the 3rd pipeline 126
Door is closed, and the valve on the second pipeline 125 and the 4th pipeline 127 is opened, and former dehydrating tower can so turned into newly again
Raw tower.At the same time, the valve on the 6th pipeline 134 and the 8th pipeline 136 of former regenerator 13 is opened, and by the 5th pipeline
133 and the 7th valve on pipeline 135 close, former regenerator 13 is turned into new dehydrating tower.New dehydrating tower and
The operation principle and process of new regenerator and the operation principle and process of former dehydrating tower 12 and former regenerator 13 are completely the same,
This is repeated no more.
In low carbon mixed alcohol, because the segregation index (ratio of relative volatility) of ethanol-propyl alcohol-butanol thing system is approximately equal to
1, and the segregation index of methanol/ethanol-propyl alcohol thing system is about 0.85, therefore should take and first separate methanol, recycle divide afterwards
Partition wall type rectifying column separating alcohol, propyl alcohol and butanol.Thus methanol rectifying tower is arranged on before dividing wall column, with dehydration
Mixed alcohol storage tank connection in device.
With continued reference to Fig. 1, methanol rectifying tower 21 includes being used for the first that the low carbon mixed alcohol after being dehydrated enters methanol rectifying tower
Alcohol rectifying column charging aperture 211, methanol rectification column overhead discharging opening 212 and methanol rectifying tower bottom of towe discharging opening 213, methanol rectifying tower
Tower top discharging opening 212 is connected with methanol tank 23.Dividing wall column 22 includes being used to purify the low carbon mixed alcohol after methanol
Dividing wall column charging aperture 221, dividing wall column tower top discharging opening 222, separation into dividing wall column
Wall type rectifying tower bottom discharging opening 223 and dividing wall column side line discharge 224, dividing wall column tower top discharging opening
222 are connected with ethanol storage tank 24, and dividing wall column bottom of towe discharging opening 223 is connected with butanol storage tank 25, divided wall rectifying
Tower side line discharge 224 is connected with propyl alcohol storage tank 26.Methanol rectifying tower 21 also passes back into including the first reflux inlet 216 and second
Mouth 217, dividing wall column 22 also includes the first reflux inlet 225 and the second reflux inlet 226.
Rectifier unit also includes the first reboiler 27, the second reboiler 28 and preheater 29, and the first reboiler 27 includes the
One entrance 271, second entrance 272, first outlet 273 and second outlet 274, the first entrance 271 and methanol of the first reboiler
Rectifying tower bottom discharging opening 213 connects, the entrance of the first outlet 273 of the first reboiler 27 and preheater 29 (shown by arrow,
The direction of arrow into preheater is entrance, and the direction that arrow leaves preheater is outlet) connection, the outlet of preheater 29 is with dividing
Partition wall type rectifying column charging aperture 221 connects, second entrance 272 and the dividing wall column tower top discharging opening of the first reboiler 27
222 connections, the second outlet 274 of the first reboiler 27 are connected with ethanol storage tank 24.Specifically, discharged in methanol rectification column overhead
It is provided with complete condenser 215 at mouthfuls 212, the entrance of complete condenser 215 (being shown by arrow, the direction that arrow enters complete condenser is entrance,
The direction that arrow leaves complete condenser is outlet) it is connected with methanol rectification column overhead discharging opening 212, the outlet of complete condenser 215 and first
Alcohol storage tank 23 connects.
Methanol eddy tank 50 is provided between the outlet of complete condenser 215 and methanol tank 23.Methanol eddy tank 50 includes
Return tank entrance 51, the first return tank outlet 52 and the second return tank for methanol eddy export 53, and methanol eddy tank returns
Stream tank entrance 51 is connected with the outlet of complete condenser 215, and the first return tank outlet 52 of methanol eddy tank is connected with methanol tank 23,
The second return tank outlet 53 of methanol eddy tank is connected with the first reflux inlet 216 of methanol rectifying tower.
Alcohol reflux tank 60 is provided between the first reboiler 27 and ethanol storage tank 24.Alcohol reflux tank 60 includes backflow
Tank entrance 61, the outlet 62 of the first return tank and the second return tank outlet 63, the return tank entrance 61 and first of alcohol reflux tank is again
The second outlet 274 of boiling device is connected, and the first return tank outlet 62 of alcohol reflux tank is connected with ethanol storage tank 24, alcohol reflux tank
The outlet of the second return tank 63 be connected with the first reflux inlet 225 of dividing wall column.
There is the second reboiler 28 at dividing wall column bottom of towe discharging opening 223, the second reboiler includes entrance 281
With outlet 282, dividing wall column bottom of towe discharging opening 223 respectively with the entrance 281 of the second reboiler 28 (shown by arrow,
The direction that arrow enters the second reboiler is entrance, and the direction that arrow leaves the second reboiler is outlet) and butanol storage tank 25
Entrance is connected, and the outlet 282 of the second reboiler 28 is connected with the second reflux inlet 226 of dividing wall column.
Opposing steam flow tank 90 is provided with the first outlet 273 of the first reboiler 27.Opposing steam flow tank 90 includes backflow
Tank entrance 91, the outlet 92 of the first return tank and the second return tank outlet 93, the return tank entrance 91 and first of opposing steam flow tank 90
The first outlet 273 of reboiler 27 is connected, and the first return tank outlet 92 of opposing steam flow tank 90 is connected with the entrance of preheater 29,
The second return tank outlet 93 of opposing steam flow tank 90 is connected with the second reflux inlet 217 of methanol rectifying tower 21.
With reference to shown in Fig. 3, when in use, the low carbon mixed alcohol from mixed alcohol storage tank 16 is through methanol rectifying tower charging aperture
211 enter methanol rectifying tower 21, are flow to entirely through methanol rectification column overhead discharging opening 212 by the methanol that methanol rectifying tower is isolated
Condensation forms liquid phase in condenser 215, after return tank entrance 51 through methanol eddy tank 50 enter in methanol eddy tank 50, afterwards
A part of methanol stores in the inflow methanol tank 23 of the first return tank outlet 52 through the return tank, this time of another part methanol warp
The second return tank outlet 53 of stream tank is back in methanol rectifying tower 21.
Low carbon mixed alcohol after rectifying methanol flows out from methanol rectifying tower bottom of towe discharging opening 213, after through the first reboiler
27 first entrance 271 enters in the first reboiler 27, and is carried out each other with the gaseous ethanol from dividing wall column 22
Heat exchange, first outlet 273 of the low carbon mixed alcohol through the first reboiler 27 after heat exchange flow out, and through opposing steam flow tank
90 return tank entrance 91 is flowed into opposing steam flow tank 90, afterwards the part warp in the low carbon mixed alcohol in opposing steam flow tank 90
The first return tank outlet 92 of opposing steam flow tank 90 is flowed into preheater 29, and another part low carbon mixed alcohol is through opposing steam flow tank 90
The second return tank outlet 93 flow in methanol rectifying tower 21 methanol rectifying tower heated.
Low carbon mixed alcohol in preheater 29 is heated to after predetermined temperature through the entrance point of dividing wall column charging aperture 221
Separated in partition wall type rectifying column 22.The ethanol now isolated is gas phase, and the gaseous ethanol is from dividing wall column tower
Ejection material mouth 222 flows out, and is flowed into afterwards by the second entrance 272 of the first reboiler in the first reboiler 27, and from methanol
Low carbon mixed alcohol in rectifying column carries out heat exchange, and the ethanol by heat exchange is changed into liquid phase and by the first reboiler from gas phase
27 second outlet 274 is flow in ethanol storage tank 24.
Meanwhile the liquid phase propyl alcohol that dividing wall column is isolated is flow to through dividing wall column side line discharge 224
In propyl alcohol storage tank 26, and a part of liquid phase butanol that dividing wall column 22 is isolated discharges through dividing wall column bottom of towe
Mouth 223 is flow in the second reboiler 28 by the entrance 281 of the second reboiler 28, is thermally formed afterwards in the second reboiler 28
Gas phase butanol simultaneously flows out from the outlet 282 of the second reboiler, is returned afterwards by the second reflux inlet 226 of dividing wall column
It flow in dividing wall column, while another part liquid phase butanol for isolating of dividing wall column is from divided wall rectifying
Tower bottom of towe discharging opening 223, which is flowed directly in butanol storage tank 25, to be stored.
In an example of the present utility model, with reference to shown in Fig. 1 and Fig. 2, methanol rectifying tower and dividing wall column
It is plate column, methanol rectifying tower and dividing wall column are provided with multiple column plates, methanol rectifying tower and divided wall essence
The column plate for evaporating tower can be according to simulation softward (such as Aspen Plus softwares, Aspen Dynamics softwares etc.) and annual cost side
Method determines.In another example of the present utility model, dividing wall column uses complete thermal coupling type, dividing wall column
Principle be exactly that the longitudinally of the tower is provided with dividing plate 228 in dividing wall column, the tower is divided into by dividing plate 228
Primary distillation tower (as shown in Figure 1 in the left part of dividing plate) and king-tower (as shown in Figure 1 in the right part of dividing plate), when low-carbon mixes
Alcohol enter dividing wall column after, first primary distillation tower realize ABC (A represent light component ethanol, B represent intermediate species propyl alcohol,
C represents heavy constituent butanol) → AB (i.e. ethanol and a part of propyl alcohol) flow to fore-running column overhead+BC (another part propyl alcohol and butanol)
Primary distillation tower bottom is flow to, the separation of ABC (i.e. ethanol, propyl alcohol and butanol) is realized in king-tower afterwards, is realized by inner couplings logistics
Backflow, play the effect of energy-conservation.Wherein the fore-running tower position of dividing wall column, the king-tower number of plates, dividing plate number and coupling position
Put all in accordance with above-mentioned simulation softward and the determination of annual cost method loop optimization.
In an also example of the present utility model, the economic benefits and social benefits integration mode of methanol rectifying tower 21 and dividing wall column 22
Using adverse current type, the mode that is thermally integrated of the first reboiler 27 and the second reboiler 28 is adverse current type, i.e. dividing wall column
Pressure be higher than methanol rectifying tower, so that dividing wall column can carry in the first reboiler 27 for methanol rectifying tower
Heating steam, while in the first reboiler 27 and the second reboiler 28 gaseous products of itself can also be made to be cooled to liquid respectively
Phase product.
The pressure of methanol rectifying tower 21 and dividing wall column 22, which combines, to be calculated by heat exchange.Pressure combines
Mode generally has following three kinds：Decompression-normal pressure (PC1), normal pressure-pressurization (PC2), decompression-pressurization (PC3).And when above-mentioned three kinds
When using successively in methanol rectifying tower and dividing wall column, find thermal efficiency be followed successively by from high to low PC3, PC1,
PC2, and energy consumption is followed successively by PC1, PC3, PC2 from low to high, and because the limitation of the first reboiler heat transfer coefficient is, it is necessary to exchange heat
Process carries out heat supplement, i.e., methanol rectifying tower, which requires supplementation with energy, makes the steam of its tower reactor reach preset temperature, but also
Separately need a small amount of heat the low carbon mixed alcohol into dividing wall column is reached preheating purpose, in summary, can obtain
Go out PC1 force combination mode, i.e. the pressure combination of decompression-normal pressure is more suitable.
With reference to shown in Fig. 1 and Fig. 2, kinetic-control system includes multiple pi controllers.Dynamic controller passes through more
Individual proportional plus integral control is to control dividing wall column tower top discharging opening, dividing wall column side line discharge, partition wall
The produced quantity of formula rectifying tower bottom discharging opening is to realize the corresponding single methanol in each storage tank to dividing wall column 22
Purity is controlled, and negative to the heat of the second reboiler 28 of the dividing wall column by multiple pi controllers
The control of lotus is to realize the control to the bottom of towe liquid level of dividing wall column 22.
As shown in Fig. 2 multiple pi controllers include multiple purity detectors 41, multiple purity controlers 42, entered
Expect detector 43, the first feed controller 441, the second feed controller 442, fluid level controller 45, the first liquid level detector
461st, the second liquid level detector 462, pressure detector 47 and pressure controller 48.Multiple purity detectors and multiple Pureness controls
Device corresponds setting each other, i.e., is provided with a pair in the porch of ethanol storage tank 24, propyl alcohol storage tank 26 and butanol storage tank 25
Purity detector 41 and purity controler 42.Kinetic-control system at ethanol storage tank 24 by setting purity detector 41 and pure
Degree controller 42 is controlled with realizing to the produced quantity of the dividing wall column tower top discharging opening 222, so as to realize to second
The purity of ethanol in alcohol storage tank 24 is controlled；Meanwhile by setting purity detector 41 and purity at propyl alcohol storage tank 26
Controller 42 is controlled with realizing to the produced quantity of the dividing wall column side line discharge 224, so as to realize to propyl alcohol
The purity of propyl alcohol in storage tank 26 is controlled；Correspondingly, by setting purity detector 41 and purity at butanol storage tank 25
Controller 42 is controlled with realizing to the produced quantity of the dividing wall column bottom of towe discharging opening 223, so as to realize to butanol
The purity of butanol in storage tank 25 is controlled.It will be understood by those skilled in the art that kinetic-control system can also and methanol
Rectifying column is connected to realize the control to methanol purity, and those skilled in the art can choose whether using dynamic as needed
Control system is controlled to produced quantity of methanol product etc., and this example is only a kind of illustrated examples, those skilled in the art
It is not construed as to a kind of limitation of the present utility model.
With continued reference to Fig. 2, the charging charging control of detector 43 and first is provided with dividing wall column charging aperture 221
Device 441 processed is provided with dividing wall column tower top discharging opening 222 and is used for control the inlet amount of dividing wall column
The pressure detector 47 and pressure controller 48 of dividing wall column tower pressure interior force are controlled, the first of dividing wall column
The first liquid level detector 461 and fluid level controller 45, dynamic control system are provided between reflux inlet 225 and alcohol reflux tank 60
System passes through the control of the first liquid level detector 461 and fluid level controller 45 to realize the control to alcohol reflux amount, so as to realize
Control to the liquid level of alcohol reflux tank 60.
It is provided with the second reboiler 28 and the liquid phase butanol in the second reboiler is added for steam heating media
The medium inlet 283 of heat and media outlet 284, are provided between the bottom of towe of medium inlet 283 and dividing wall column 22
Second feed controller 442 and the second liquid level detector 462, kinetic-control system pass through the second feed controller 442 and second
Liquid level detector 462 is controlled to the thermic load of the second reboiler 28, so as to realize the tower bottom liquid to dividing wall column 22
The control of position.When in use, after the liquid butanol of dividing wall column bottom of towe discharging opening 223 is partly into the second reboiler
Steam heating media by coming from medium inlet 283 carries out being thermally formed gas phase butanol, afterwards gas phase butanol from second again
Boiling device is back in dividing wall column, while the steam heating media in the second reboiler 28 to liquid phase butanol after heating
Liquid (such as water) is formed, flows out the second reboiler 28 from media outlet 284 afterwards.
It will be understood by those skilled in the art that the first reboiler 27 can be arranged as required to boil again for condenser, second
Device 28 can be arranged as required to be selected accordingly as needed for heat exchanger, those skilled in the art.This area
Technical staff is to be further understood that between the second entrance 272 of the first reboiler and dividing wall column tower top discharging opening 222
The liquid level detector and charging that may be provided for the tower pressure interior force of kinetic-control system control dividing wall column control
Device.Certainly, those skilled in the art are to be further understood that kinetic-control system can also be by adopting to dividing wall column tower top
The control of output realizes and tower top liquid level is controlled, and passes through the capacity of returns of the alcohol reflux tank 60 to dividing wall column
Control is realized to being controlled to alcohol product purity, by being controlled to the thermic load of the second reboiler 28 to butanol product purity
System, this example are only a kind of illustrated examples, and those skilled in the art are not construed as to a kind of limitation of the present utility model.
Dividing wall column needs to be controlled 6 manipulation type frees degree, and in control, generally use PI (accumulate by ratio
Point) be controlled, its parameter is determined by relay feedback method and Tyreus-Luyben criterions.Specifically, 6 operability from
It is respectively capacity of returns L by degree, liquid phase sendout I (i.e. liquid phase flow of the distribution into the king-tower side of dividing wall column), divides
Partition wall type rectifying column tower top produced quantity D, dividing wall column side take-off amount S, dividing wall column bottom of towe produced quantity B,
Dividing wall column tower reactor thermic load V (i.e. the thermic load of the second reboiler of dividing wall column).
Embodiment one
By taking the mixed alcohol that water, methanol, ethanol, propyl alcohol and butanol are formed as an example, its reclaimed water/methanol/ethanol/propyl alcohol/butanol
Mol ratio be 2.8/5.56/3.73/2.21/1 exemplified by, the product purity of methanol, ethanol, propyl alcohol and the butanol that need to isolate is equal
Following result need to can be calculated by simulation softward described above more than 0.95：
It is about 0.6m that the tower diameter of dehydrating tower 12 and regenerator 13, which is set, and its operating pressure is controlled in 1.5atm, can contained
It 0.15% is product that water, which is, that is, the low carbon mixed alcohol after being dehydrated.
Afterwards by the control of methanol rectifying tower operating pressure in the range of 0.28~0.31atm, tower top temperature is controlled at 36 DEG C
In the range of~38 DEG C, column bottom temperature is controlled in the range of 68~71 DEG C, reflux ratio (the i.e. capacity of returns of methanol eddy tank and methanol essence
Evaporate the ratio between discharge of column overhead discharging opening) 2.4 are arranged to, it is about 0.99 that thus can obtain methanol product purity.
Simultaneously by the control of the operating pressure of dividing wall column 22 in the range of 0.9~1.1atm, tower top temperature control exists
To control the rectifying of alcohol product in the range of 76~79 DEG C, column bottom temperature is controlled in the range of 124~127 DEG C to control butanol to produce
The rectifying of product, the temperature control of dividing wall column side line discharge 224 is in the range of 100~103 DEG C to control propyl alcohol to produce
The rectifying of product, reflux ratio (the i.e. discharge of the capacity of returns of the corresponding return tank of dividing wall column and corresponding discharging opening
The ratio between) 2.2 are arranged to, the coupling position of dividing plate 228 is that gas phase distribution ratio is (i.e. into dividing wall column close to middle part
The ratio of the gas phase of the gas phase of king-tower side and the dividing wall column bottom of towe) scope is 0.5~0.7, liquid phase distribution ratio (be into
Entering the ratio of the liquid phase of the king-tower side of dividing wall column and the backflow liquid phase of the dividing wall column tower top) scope is
0.3~0.4, ethanol, propyl alcohol, butanol product purity thus can be obtained about more than 0.99.
By taking product flow and composition fluctuation ± 5% as an example, kinetic-control system mode is described in detail, it is specific as follows：
Mould is carried out to the dynamic process of dividing wall column using simulation softward (such as Aspen Dynamics softwares)
Meter is proposed, wherein having manipulation type variable capacity of returns L, liquid phase sendout I, overhead extraction amount D, side take-off in board design
Measure S, bottom of towe produced quantity B, tower reactor thermic load V, condenser duty Qc.Wherein, it is typically cold using the tower top of dividing wall column
Condenser (such as first reboiler 27 shown in Fig. 1) load Qc controls tower top pressure, therefore is only left capacity of returns L, liquid phase point
Dosage I, dividing wall column overhead extraction amount D, dividing wall column side take-off amount S, dividing wall column bottom of towe
This 6 performance variables of produced quantity B, dividing wall column tower reactor thermic load V.And the amount that dividing wall column needs to control is
Liquid level, alcohol product purity, propyl alcohol product purity, butanol product purity and the tower reactor liquid level of (tower top) alcohol reflux tank 60.By
Become uncontrollable in the pressure of primary distillation tower (left part of dividing plate i.e. as shown in Figure 1), therefore controlled just with liquid phase sendout I
Evaporate column overhead pressure.
In simulation softward, primary distillation tower tower top pressure is controlled with liquid phase sendout I：It is first to set PV (i.e. currency) signal
Column overhead pressure is evaporated, OP (i.e. output valve) signal is liquid-phase reflux amount I.After initialization is run, setting value is automatically entered, and with
Setting value is that median determines scope, does method of testing with closed loop, carries out relay feedback test, pass through Tyreus-
It is 12.16 that scale parameter K, which is calculated, in Luyben criterions, and it is 14.52min that time of integration τ, which is calculated,；
Tower top pressure is controlled with overhead condenser duty Qc：PV (i.e. currency) signals are set as primary distillation tower tower top pressure,
OP (i.e. output valve) signal is overhead condensation load Qc.After initialization is run, setting value is automatically entered, and using setting value in
Between value determine scope, do method of testing with closed loop, carry out relay feedback test, calculated by Tyreus-Luyben criterions
It is 7.5 to draw scale parameter K, and it is 2min that time of integration τ, which is calculated,；
Dividing wall column tower top liquid level is controlled with capacity of returns L：PV (i.e. currency) signals are set as divided wall essence
Column overhead liquid level is evaporated, OP (i.e. output valve) signal is capacity of returns L.After initialization is run, setting value is automatically entered, and with setting
It is worth and determines scope for median, does method of testing with closed loop, carry out relay feedback test, it is accurate by Tyreus-Luyben
It is 46.09 that scale parameter K, which is then calculated, and it is 3.96min that time of integration τ, which is calculated,；
Dividing wall column overhead product purity is controlled with dividing wall column overhead extraction amount D：Setting PV (works as
Preceding value) signal is dividing wall column alcohol product purity, OP (i.e. output valve) signal is that dividing wall column tower top is adopted
Output D.After initialization is run, setting value is automatically entered, and scope is determined by median of setting value, is surveyed with closed loop
Method for testing, relay feedback test is carried out, it is 19.37 that scale parameter K, which is calculated, by Tyreus-Luyben criterions, is calculated
It is 233.64min to go out time of integration τ；
Dividing wall column sideline product purity is controlled with dividing wall column side take-off amount S：Setting PV (works as
Preceding value) signal is dividing wall column propyl alcohol product purity, OP (i.e. output valve) signal is that dividing wall column side line is adopted
Output S.After initialization is run, setting value is automatically entered, and scope is determined by median of setting value, is surveyed with closed loop
Method for testing, relay feedback test is carried out, it is 86.21 that scale parameter K, which is calculated, by Tyreus-Luyben criterions, is calculated
It is 22.44min to go out time of integration τ；
Dividing wall column bottom product purity is controlled with dividing wall column bottom of towe produced quantity B：Setting PV (works as
Preceding value) signal is dividing wall column butanol product purity, OP (i.e. output valve) signal is that dividing wall column bottom of towe is adopted
Output B.After initialization is run, setting value is automatically entered, and scope is determined by median of setting value, is surveyed with closed loop
Method for testing, relay feedback test is carried out, it is 1087 that scale parameter K, which is calculated, by Tyreus-Luyben criterions, is calculated
Time of integration τ is 25.08min；
Dividing wall column tower reactor liquid level is controlled with dividing wall column tower reactor thermic load V：It is (i.e. current to set PV
Value) signal is dividing wall column tower reactor liquid level, OP (i.e. output valve) signal is dividing wall column tower reactor thermic load V.
After initialization is run, setting value is automatically entered, and scope is determined by median of setting value, test side is done with closed loop
Method, relay feedback test is carried out, it is 88.03 that scale parameter K, which is calculated, by Tyreus-Luyben criterions, and product is calculated
τ is 10.56min between timesharing.
Piece-rate system provided by the utility model for low carbon mixed alcohol at least possesses one in advantages below：
(1) piece-rate system provided by the utility model for low carbon mixed alcohol uses dividing wall column and economic benefits and social benefits
The mode that distillation technology is combined separates low carbon mixed alcohol, can not only ensure in low carbon mixed alcohol it is separated go out single methanol it is pure
Degree, and energy-saving efficiency can improve 20%；
(2) piece-rate system provided by the utility model for low carbon mixed alcohol using two tower periodical operations dehydration,
Double-effect rectification technology and kinetic-control system are controlled to dividing wall column, product flow and composition fluctuation ±
In the case of 5%, the purity of each single methanol can recover desired value, and setting by kinetic-control system at about 5 hours or so
Meter can also solve the problems, such as that dividing wall column separation low carbon mixed alcohol is whard to control；
(3) piece-rate system provided by the utility model for low carbon mixed alcohol can solve the problem that single methanol is not readily separated, and
Relative to multitower isolation technics, the water that azeotropic mixture is formed with alcohol can be first passed through to dehydration device removing, thus, it is possible to reduce behaviour
Make difficulty, simultaneously because using double-effect rectification technology, further effectively save tower so that cost of investment reduces；
(4) piece-rate system provided by the utility model for low carbon mixed alcohol controls three lines using kinetic-control system
Product (i.e. ethanol, propyl alcohol and butanol) purity, and and the pressure of primary distillation tower is set into kinetic-control system, make result more
Close to truth.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (8)
- A kind of 1. piece-rate system for low carbon mixed alcohol, it is characterised in thatThe piece-rate system is included for the dehydration device to low carbon mixed alcohol dehydration, for double to low carbon mixed alcohol progress The rectifier unit of rectifying and the kinetic-control system for controlling the rectifier unit are imitated, the rectifier unit includes being connected to each other Methanol rectifying tower and to by the methanol rectifying tower purify methanol after low carbon mixed alcohol be fractionated dividing wall column, institute Kinetic-control system is stated to be connected to each other with the dividing wall column.
- 2. the piece-rate system according to claim 1 for low carbon mixed alcohol, it is characterised in thatThe methanol rectifying tower that the methanol rectifying tower includes entering for the low carbon mixed alcohol after being dehydrated the methanol rectifying tower enters Material mouth, methanol rectification column overhead discharging opening and methanol rectifying tower bottom of towe discharging opening, the methanol rectification column overhead discharging opening and first Alcohol storage tank connects,The dividing wall column, which includes being used for purifying the low carbon mixed alcohol after methanol, enters the dividing wall column Dividing wall column charging aperture, dividing wall column tower top discharging opening, dividing wall column bottom of towe discharging opening and separation Wall type rectifying column side line discharge, the dividing wall column tower top discharging opening are connected with ethanol storage tank, the divided wall Rectifying tower bottom discharging opening is connected with butanol storage tank, and the dividing wall column side line discharge is connected with propyl alcohol storage tank.
- 3. the piece-rate system according to claim 2 for low carbon mixed alcohol, it is characterised in thatThe rectifier unit also includes the first reboiler, the second reboiler and preheater, and first reboiler enters including first Mouth, second entrance, first outlet and second outlet, the first entrance of first reboiler go out with the methanol rectifying tower bottom of towe Material mouth is connected, and the first outlet of first reboiler is connected with the entrance of the preheater, the outlet of the preheater and institute The connection of dividing wall column charging aperture is stated,The second entrance of first reboiler is connected with the dividing wall column tower top discharging opening, first reboiler Second outlet be connected with the ethanol storage tank.
- 4. the piece-rate system according to claim 3 for low carbon mixed alcohol, it is characterised in thatThe methanol rectification column overhead discharge outlet is provided with complete condenser, the entrance of the complete condenser and the methanol rectifying tower Tower top discharging opening is connected, and the outlet of the complete condenser is connected with the methanol tank；The methanol rectifying tower also includes the first reflux inlet and the second reflux inlet, and the dividing wall column also includes the One reflux inlet and the second reflux inlet, methanol eddy is provided between the outlet of the complete condenser and the methanol tank Tank, the methanol eddy tank include return tank entrance, the outlet of the first return tank and the second return tank for methanol eddy and exported, The return tank entrance of the methanol eddy tank is connected with the outlet of the complete condenser, and the first return tank of the methanol eddy tank goes out Mouth is connected with the methanol tank, the second return tank outlet of the methanol eddy tank and the first backflow of the methanol rectifying tower Entrance connects；Alcohol reflux tank is provided between first reboiler and the ethanol storage tank, the alcohol reflux tank includes backflow Tank entrance, the outlet of the first return tank and the outlet of the second return tank, the return tank entrance of the alcohol reflux tank and described first is again The second outlet connection of device is boiled, the first return tank outlet of the alcohol reflux tank is connected with the ethanol storage tank, the ethanol Second bypass outlet of return tank is connected with the first reflux inlet of the dividing wall column.
- 5. the piece-rate system according to claim 4 for low carbon mixed alcohol, it is characterised in thatSecond reboiler, the dividing wall column are additionally provided with the dividing wall column bottom of towe discharge outlet Bottom of towe discharging opening is connected with the entrance of second reboiler and the butanol storage tank respectively, the outlet of second reboiler with The second reflux inlet connection of the dividing wall column,Opposing steam flow tank is provided with the first outlet of first reboiler, the opposing steam flow tank enters including return tank Mouth, the outlet of the first return tank and the outlet of the second return tank, the return tank entrance of the opposing steam flow tank and first reboiler First outlet connection, the opposing steam flow tank the first return tank outlet is connected with the entrance of the preheater, the steam The second return tank outlet of return tank is connected with the second reflux inlet of the methanol rectifying tower.
- 6. the piece-rate system according to claim 5 for low carbon mixed alcohol, it is characterised in thatThe kinetic-control system includes multiple pi controllers, and the multiple pi controller is separately positioned on institute State dividing wall column tower top discharging opening, dividing wall column side line discharge, dividing wall column bottom of towe discharging opening At the second reboiler.
- 7. the piece-rate system according to claim 6 for low carbon mixed alcohol, it is characterised in thatThe multiple pi controller enters including multiple purity detectors, multiple purity controlers, charging detector, first Expect controller, the second feed controller, fluid level controller, the first liquid level detector, the second liquid level detector, pressure controller and Pressure detector,The multiple purity detector and multiple purity controlers correspond setting each other, and the multiple purity detector and Multiple purity controlers are separately positioned at the ethanol storage tank, propyl alcohol storage tank and butanol storage tank,The charging detector and the first feed controller are arranged at the dividing wall column charging aperture,First liquid level detector and fluid level controller are arranged at the alcohol reflux tank,Second feed controller and the second fluid level controller are arranged at second reboiler and dividing wall column Between,The pressure controller and pressure detector are arranged at the dividing wall column tower top discharge outlet.
- 8. the piece-rate system for low carbon mixed alcohol according to any one of claim 2-7, it is characterised in thatThe dehydration device includes separator, dehydrating tower, regenerator, heater, condenser and mixed alcohol storage tank, the dehydrating tower Be provided with regenerator to the low carbon mixed alcohol dehydration molecular sieve,The entrance of the dehydrating tower is connected with the outlet of the separator and the entrance of the condenser respectively, the dehydrating tower Export the outlet respectively with the entrance and the heater of the mixed alcohol storage tank to be connected, the outlet of the mixed alcohol storage tank and institute The connection of methanol rectifying tower charging aperture is stated,The entrance of the regenerator is connected with the outlet of the heater and the entrance of the mixed alcohol storage tank respectively, the regeneration Outlet of the outlet of tower respectively with the entrance and separator of the condenser is connected.
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| CN201720452690.3U CN206666416U (en) | 2017-04-27 | 2017-04-27 | Piece-rate system for low carbon mixed alcohol |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916050A (en) * | 2017-04-27 | 2017-07-04 | 太原理工大学 | For the piece-rate system and its application method of MAS |
| CN116041150A (en) * | 2022-12-22 | 2023-05-02 | 厦门大学 | Accurate separation method of double-tower low-carbon mixed alcohol |
-
2017
- 2017-04-27 CN CN201720452690.3U patent/CN206666416U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106916050A (en) * | 2017-04-27 | 2017-07-04 | 太原理工大学 | For the piece-rate system and its application method of MAS |
| CN106916050B (en) * | 2017-04-27 | 2023-11-07 | 太原理工大学 | Separation device for low-carbon mixed alcohol and application method thereof |
| CN116041150A (en) * | 2022-12-22 | 2023-05-02 | 厦门大学 | Accurate separation method of double-tower low-carbon mixed alcohol |
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