CN107837554A - The method of quality control of divided wall column - Google Patents
The method of quality control of divided wall column Download PDFInfo
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- CN107837554A CN107837554A CN201610831425.6A CN201610831425A CN107837554A CN 107837554 A CN107837554 A CN 107837554A CN 201610831425 A CN201610831425 A CN 201610831425A CN 107837554 A CN107837554 A CN 107837554A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/141—Fractional distillation or use of a fractionation or rectification column where at least one distillation column contains at least one dividing wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
Abstract
The present invention relates to a kind of method of quality control of divided wall column, mainly solve that conventional divided wall column operational control is difficult, stability is bad and product quality and the uppity technical problem of yield.The present invention is by using to five control areas of divided wall column：Feedstock control area, overhead reflux and extraction control area, liquid are collected and distribution control area, side take-off control area and tower reactor produce the technical scheme that temperature, flow and liquid level in control area are controlled and preferably solve above-mentioned technical problem, available in the industrial production of divided wall column.
Description
Technical field
The present invention relates to a kind of method of quality control of divided wall column, available in the industrial production of divided wall column.
Background technology
Rectifying is most ripe, most widely used a kind of isolation technics in petrochemical industry production, but distillation process energy consumption is huge
Greatly, it is estimated that, 40~70% energy consumption is used to separate in chemical process, and energy consumption of rectification accounts for therein 95%.In order to reduce essence
The energy consumption of process is evaporated, researcher both domestic and external is conducted extensive research, and divided wall column is set as a kind of typical Finestill energy-saving
Standby or process intensification power-saving technology is of great interest.
Divided wall column is by installing the vertical partition plate of one or more certain length or with inclination angle in a rectifying column
The dividing plate of degree, using a set of vaporization and condensation system, while the product of isolated three kinds or more.Due to only having a set of vapour
Change condenser system, and avoid and remixed using intermediate species during multitower rectifying, therefore bulkhead distillation technology is than traditional
Distillation technology investment reduction 20~30%, energy consumption reduce by 20~40%.
In fact, most early in nineteen thirty, Eeic W.Luster (US1915681) are just because the separation of cracking gas proposes point
The concept of wall tower, but until 1985 First divided wall column (BASF) just put into industrial production, so far also only have more than 200 bulkhead
Tower is in commercial Application, it is difficult to is widely popularized, basic reason therein is in addition to lacking reliable structure design, divided wall column
Larger difficulty be present in operation and control aspect is also the crucial point that can not be ignored.
By taking the divided wall column for being most commonly used for three components separation as an example, dividing plate is axially placed along tower, by divided wall column be divided into every
The public stripping section below public rectifying section, dividing plate more than plate, and the bulkhead section where dividing plate, according to charging and middle groups
Divide the difference of extraction, bulkhead section is divided into feed side and product side again.Therefore, compared with conventional rectification tower, divided wall column is tied due to it
The particularity of structure, the free degree is more, except with conventional rectification tower identical technological parameter, such as operating pressure, cooling and heating load, backflow
Than, product produced quantity etc., extraction and the distribution condition of dividing plate both sides gas phase and liquid phase of the divided wall column also including sideline product, and
And highly coupled between above-mentioned technological parameter, change it is therein any one can bring direct shadow to the operation of other specification
Ring, such as the change of overhead reflux liquid measure not only influences overhead product quality, also directly changes public rectifying section bottom distillate
The total amount of body, in the case of fixed both sides liquid phase distribution ratio, the distribution liquid measure of demarcation strip both sides is directly affected, and both sides are distributed
The change of liquid measure, and the pre-separation effect and the sideline product quality of product side that bulkhead section feeding side will be directly affected；If
Both sides distribution liquid measure fix in the case of, then the change of overhead reflux liquid measure will directly destruction tower in material balance, influence to pass
Matter, heat transfer and vapor liquid equilibrium process, therefore, height coupling and chain reaction in divided wall column between technological parameter can significantly affect point
The product quality of wall tower and stable operation control, and this is also exactly the immediate cause that divided wall column is difficult to stability contorting, is point
A research emphasis and difficult point for wall tower development process.
At present, the publication in terms of divided wall column operation and quality control is less, is disclosed in CN102631791A
A kind of control method of divided wall column, mainly in 3 control methods of E.A.Wolff et al. (Operation of integrated
three-product(Petlyuk)distillation columns,E.A.Wolff,S.Skogestad,
Ind.Eng.Chem.Res.,1995,34(6):2094-2103) on the basis of, a control loop has been increased newly, i.e., in adjusting tower
Push up capacity of returns control tower top product purity, regulation side take-off amount control sideline product purity, regulation tower reactor quantity of steam control tower
On the basis of kettle product purity, add and controlled by adjusting the liquid phase distribution ratio of bulkhead tower dividing plates both sides at the top of feed side
Rise the heavy constituent content in gas phase.Although it has all carried out corresponding control to product quality, tower top and tower reactor product go out
Doses does not control, each product yield including sideline product can not ensure, meanwhile, the liquid level in multiple regions in tower,
Such as overhead reflux region, public rectifying section bottom liquid is collected and distribution region, and control explanation is not done in tower reactor region, difficult
To ensure the material balance of divided wall column and stability contorting.
Obviously, control method of the prior art can not ensure to ensure product yield while product quality, can not realize
Stable operation, therefore, it is necessary to more efficiently method of quality control is developed, to the numerous technological parameters or performance variable of divided wall column
Comprehensively controlled, realize the stable operation of divided wall column, while ensure the quality and yield of each product.
The content of the invention
It is to be solved by this invention be that divided wall column operational control in the prior art is difficult, stability is bad and product quality and
The uppity technical problem of yield.The invention provides a kind of method of quality control of divided wall column, by divided wall column not
With the temperature in region, flow and Liquid level, comprehensive control of divided wall column is realized, both ensure that product quality, product yield,
Stability contorting is also achieved, available in the industrial production of divided wall column.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is as follows：Divided wall column includes 5 control areas,
Respectively：Feedstock control area, overhead reflux and extraction control area, liquid are collected and distribution control area, side line are adopted
Go out control area, and tower reactor produces control area, the control method of each control area is as follows：
(1) feedstock control area：Feedstock amount is controlled using flow controller；
(2) overhead reflux and extraction control area：Using temperature controller control overhead condenser cold, using flow control
Device processed controls overhead product produced quantity, controls tower top backflow volume using fluid level controller；
(3) control area is collected and distributed to liquid：Public rectifying section bottom is controlled to distillate liquid using fluid level controller
Flow, the distribution liquid measure using temperature controller control bulkhead section feeding side；
(4) side take-off control area：Sideline product produced quantity is controlled using flow controller；
(5) tower reactor extraction control area：Using temperature controller control tower reactor reboiler heat, using fluid level controller control
Tower reactor product produced quantity processed.
In above-mentioned technical proposal, what the flow controller in feedstock control area controlled is feedstock amount, according to
The feedstock amount of setting automatically adjusts actual feedstock amount.
In above-mentioned technical proposal, what the temperature controller in overhead reflux and extraction control area controlled is that divided wall column is public
The temperature of rectifying section sensitive plate, according to this sensitive plate temperature automatic adjustment overhead condenser cold.Due to temperature and pair of composition
It should be related to, the temperature control of public rectifying section sensitive plate be realized by adjusting overhead condenser cold, it is ensured that tower top
Product quality.Usual public rectifying section sensitive plate is located at the top or middle and upper part of public rectifying section.
In above-mentioned technical proposal, what the flow controller in overhead reflux and extraction control area controlled is that overhead product is adopted
Output, its flow are set according to percentage composition in feed composition of feedstock amount and corresponding light component, root
Actual overhead product produced quantity is automatically adjusted according to the product produced quantity of above-mentioned setting, so as to ensure that the yield of overhead product.
In above-mentioned technical proposal, what the fluid level controller in overhead reflux and extraction control area controlled is return tank of top of the tower
Liquid level, top reflux flow rate is automatically adjusted according to the liquid level.Because overhead reflux and extraction have carried out corresponding control,
Therefore, the stabilization of return tank of top of the tower liquid level is realized, is equal to the stable operation for realizing overhead reflux and producing region, protects simultaneously
The material balance of light component in divided wall column is demonstrate,proved.
In above-mentioned technical proposal, what the fluid level controller in liquid collection and distribution control area controlled is that divided wall column is public
The liquid level of rectifying section bottom liquid collecting zone, the total flow that bottom distillates liquid is automatically adjusted according to the liquid level.Due to separating
The liquid distribution of plate both sides directly affects the separating resulting of divided wall column, and above-mentioned distribution liquid comes from public rectifying section bottom
Liquid collection regions liquid, therefore, to the region carry out Liquid level, help avoid gas phase race material or liquid phase overflow
Stream, while ensure liquid distribution effects and the stable operation of divided wall column of bulkhead sides.
In above-mentioned technical proposal, what the temperature controller in liquid collection and distribution control area controlled is divided wall column bulkhead
The temperature of section feeding side sensitive plate, according to the distribution liquid measure of this sensitive plate temperature automatic adjustment feed side.Due to the master of feed side
It is the pre-separation for realizing raw material to act on, i.e., part intermediate species with light component enter public rectifying section, remaining intermediate species with
Heavy constituent enters public stripping section, therefore, liquid measure is distributed to realize the temperature of bulkhead section feeding side sensitive plate by adjusting feed side
Degree control, it is ensured that above-mentioned pre-separation effect, effectively avoid heavy constituent from entering public rectifying section from the top of demarcation strip, and then
Enter product side in a manner of liquid phase, influence sideline product quality.Usual divided wall column bulkhead section feeding side sensitive plate is located at feed side
Top or middle and upper part.
In above-mentioned technical proposal, what the flow controller in side take-off control area controlled is sideline product produced quantity,
Its flow is according to feedstock amount and corresponds to percentage composition of the intermediate species in feed composition to be set, according to upper
The product produced quantity for stating setting automatically adjusts actual sideline product produced quantity, so as to ensure that the yield of sideline product.
In above-mentioned technical proposal, what the temperature controller in tower reactor extraction control area controlled is the public stripping section of divided wall column
The temperature of sensitive plate, according to this sensitive plate temperature automatic adjustment tower reactor reboiler heat.By controlling rational sensitive plate temperature
Scope, it can both avoid heavy constituent from rising excessive influence sideline product quality, the abundant evaporation of intermediate species can be ensured again, from
And ensure the product quality of tower reactor.The usual public stripping section sensitive plate of divided wall column is located at the top or middle and upper part of public stripping section.
In above-mentioned technical proposal, what the fluid level controller in tower reactor extraction control area controlled is the liquid of divided wall column tower reactor
Position, tower reactor product produced quantity is automatically adjusted according to the liquid level.Obviously, tower reactor liquid level is controlled, advantageously ensured that in tower
Rise vapor volume, realize the stable operation of divided wall column；Meanwhile effective control is being carried out to tower top and sideline product produced quantity
On the basis of, the yield of tower reactor product is in turn ensure that, realizes the material balance of whole tower.
Sum it up, the corresponding relation based on temperature in rectifying column with composition, the sensitive plate temperature of public rectifying section are straight
The sensitive plate temperature for connecing the quality for influenceing overhead product, bulkhead section feeding side and public stripping section then directly affects product side roof part
Decline heavy constituent and public stripping section bottom rises the content of heavy constituent, namely directly affect the quality of sideline product, therefore, lead to
The quality of tower top and sideline product can be ensured by crossing the suitable sensitive plate temperature of control.By adjusting overhead condenser in the present invention
Cold realize control to the sensitive plate temperature of public rectifying section, so as to ensure that overhead product quality；By adjusting liquid
Feed side distribution liquid measure and the tower reactor reboiler heat collected and distribute in control area, are realized to bulkhead section feeding side respectively
With the temperature control of public stripping section sensitive plate, it is achieved thereby that to product side impurity, the especially control of heavy constituent content, protect
Sideline product quality is demonstrate,proved；Meanwhile on the premise of the said goods quality is ensured, the present invention by feedstock control area,
Three flow controllers in overhead reflux and extraction control area and side take-off control area realize to enter raw material respectively
The control of doses, tower top and sideline product produced quantity, so as to ensure that the yield of tower top and sideline product；In addition, it is based on bulkhead
The stable operation of tower and product produced quantity are influenceed by tower inner vapor amount or gas-liquid flow, and the present invention is by adjusting tower reactor extraction control
The phegma flow in tower reactor produced quantity and overhead reflux and extraction control area in region processed, is realized to tower bottoms respectively
Position and the control of overhead condensation tank liquid level, and the bottom by adjusting liquid collection and distribution control area distillates total amount of liquid
The Liquid level to the region is realized, so as on the one hand ensure that the material balance of gas-liquid flow and whole tower in tower, now,
In the case where tower top and sideline product quality and yield have achieved effective control, the product quality and yield of tower reactor also enter one
Step is guaranteed, and on the other hand then ensure that the stable operation of full tower regional, realizes the stable behaviour of whole divided wall column
Make；Therefore, above-mentioned five control areas, i.e. feedstock control area, overhead reflux and extraction control area, liquid are collected
And trip temperature, flow and liquid level are entered in distribution control area, side take-off control area and tower reactor extraction control area respectively
Control, it can not only ensure the quality and yield of tower top, side line and tower reactor product, moreover it is possible to ensure to include tower top, tower in divided wall column
The stable operation of the regionals such as kettle, public rectifying section bottom, finally realizes the stable operation of whole tower.Therefore, using the present invention
Disclosed technology can preferably solve bad conventional divided wall column operational control difficulty, stability and product quality and yield is not easy
The technical problem of control.
Brief description of the drawings
Fig. 1 is divided wall column method of quality control schematic diagram involved in the present invention；
Fig. 2 is the divided wall column control method schematic diagram described in comparative example 1；
Fig. 3 is the divided wall column control method schematic diagram described in comparative example 2.
In Fig. 1, C101 is divided wall column, E101 is overhead condenser, E102 is tower reactor reboiler；TIC be temperature controller,
FIC is flow controller, LIC is fluid level controller；Middle part of the demarcation strip along tower is placed, and divided wall column is divided into 4 parts, I is
Public rectifying section, II are public stripping section, III is bulkhead section feeding side, IV is bulkhead section product side；N1 is the spirit of public rectifying section
Quick plate, N2 are bulkhead section feeding side sensitive plate, N3 is public stripping section sensitive plate；Logistics (101) is raw material, logistics (102) is
Overhead product, logistics (103) are sideline product, logistics (104) is tower reactor product, logistics (105) is overhead reflux liquid, logistics
(106) be public rectifying section bottom distillate, logistics (107) is the distribution liquid of bulkhead section feeding side, logistics (108) is bulkhead section
The distribution liquid of product side.
In Fig. 1, feedstock region is using flow controller control feedstock valve opening；Overhead reflux and using region
Returned using public rectifying section sensitive plate N1 temperature control tower top condenser E101 cooling power or cold medium flux, using tower top
Flow tank liquid level liquid level control tower top phegma flow, using flow controller control overhead product extraction control valve opening；Liquid
Collect and distribution region is distillated the total flow of liquid using the Liquid level bottom of public rectifying section bottom liquid collecting region, used
The control valve opening of feed side sensitive plate N2 temperature control feed side distribution liquid；Side take-off region uses flow controller
Control sideline product extraction control valve opening；Tower reactor extraction region uses public stripping section sensitive plate N3 temperature control tower reactor again
Boil device E102 heating power or flow rate of heat medium, control valve opening produced using tower reactor liquid level control tower kettle product.
In Fig. 2, in addition to feed preheater, the equipment and logistics of divided wall column are consistent with Fig. 1, and its control program is：Pass through tower
Top product form control tower top backflow volume, by sideline product composition control sideline product produced quantity, pass through tower reactor product group
Demarcation strip two is controlled into control tower reactor reboiler heat duty, and by the heavy constituent content in bulkhead section feeding side roof part gas phase
The ratio of liquid is distributed in side.
In Fig. 3, the equipment and logistics of divided wall column are consistent with Fig. 1, and its control program is：Pass through the spirit of bulkhead section product side roof part
Quick plate temperature control tower top backflow volume, by overhead condenser Liquid level overhead product produced quantity, pass through public rectifying section
Bottom liquid collecting region Liquid level bulkhead section feeding side distribution liquid measure, passing ratio controller control dividing plate both sides distribution liquid measure
Between ratio, by bulkhead section product side bottom sensitive plate temperature control sideline product produced quantity, and pass through tower reactor liquid level control
Tower reactor product produced quantity processed.
Below by embodiment, the invention will be further elaborated.
Embodiment
【Embodiment 1】
Using benzene/methylbenzene/mixed xylenes material as raw material, its composition by weight percentage for 12.80% benzene+
The mixed xylenes of 70.69% toluene+16.51%.On the basis of feed rate 80g/min, divided wall column operation control as shown in Figure 1
Method processed is separated, and tower top obtains benzaldehyde product, and side line obtains toluene product, and tower reactor obtains mixed xylenes product.Wherein divide
Total number of theoretical plate of wall tower is 70, the number of theoretical plate of public rectifying section is 15, the number of theoretical plate of bulkhead section feeding side and product side
It is 35, the 23rd piece of theoretical plate of raw material from bulkhead section feeding side I numbers from top to bottom enters, toluene is from bulkhead section product side III
The 17th piece of theoretical plate extraction of number from top to bottom, operating pressure is normal pressure, and sensitive plate N1, N2, N3 control temperature are respectively
79.8 DEG C, 108.4 DEG C, 113.5 DEG C, tower top, the produced quantity of side line be controlled as 10.2g/min, 56.5g/min, tower top is cold
The liquid level of solidifying tank, liquid collection region and tower reactor controls 50%, 65%, 75% respectively, and control result is as shown in table 1.It can see
Go out, the purity of benzene, toluene and mixed xylenes product reaches more than 99.9%, the yield of benzene and toluene also reach 99.9% with
On, while the stabilization time of whole tower is shorter, about 3~4hr, separating effect and stabilization time are significantly better than that comparative example, explanation
Method of quality control involved in the present invention realizes the preferable control effect of divided wall column.
【Embodiment 2】
Using benzene/methylbenzene/mixed xylenes material as raw material, its composition by weight percentage for 33.85% benzene+
The mixed xylenes of 54.61% toluene+11.54%.On the basis of feed rate 80g/min, divided wall column operation control as shown in Figure 1
Method processed is separated, and total number of theoretical plate of wherein divided wall column is 70, the number of theoretical plate of public rectifying section is 20, bulkhead section feeding
The number of theoretical plate of side and product side is 30, and raw material enters from bulkhead section feeding side I the 17th piece of theoretical plate counted from top to bottom, first
Benzene is from the 15th piece of theoretical plate extraction of bulkhead section product side III numbers from top to bottom, and operating pressure is normal pressure, sensitive plate N1, N2, N3
Control temperature be respectively 80 DEG C, 108.6 DEG C, 113.9 DEG C, tower top, the produced quantity of side line be controlled as 27.1g/min,
43.6g/min, the liquid level of overhead condensation tank, liquid collection region and tower reactor control 60%, 60%, 75% respectively, control result
As shown in table 1.As can be seen that after changing raw material composition and the structural parameters of divided wall column, quality control side involved in the present invention
Method has equally reached preferable control effect.
【Embodiment 3】
Using ethanol/isobutanol/n-amyl alcohol mixed material as raw material, its composition by weight percentage is 12.80% second
The n-amyl alcohol of the isobutanol of alcohol+70.69%+16.51%.On the basis of feed rate 80g/min, divided wall column operation as shown in Figure 1
Control method is separated, and tower top obtains alcohol product, and side line obtains isobutanol product, and tower reactor obtains n-amyl alcohol product.Wherein
For divided wall column structural parameters with embodiment 1, operating pressure is normal pressure, sensitive plate N1, N2, N3 control temperature is respectively 77.6 DEG C,
105.7 DEG C, 110.2 DEG C, tower top, the produced quantity of side line be controlled as 10.2g/min, 56.5g/min, overhead condensation tank, liquid
The liquid level of body collecting region and tower reactor controls 60%, 60%, 80% respectively, and control result is as shown in table 1.As can be seen that change
After separation mixture, method of quality control involved in the present invention still can realize preferable control effect.
The control effect of table 1
【Comparative example 1】
Formed using divided wall column same as Example 1 and raw material, control method as shown in Figure 2 is separated, and is controlled
It the results are shown in Table shown in 2.As can be seen that under the control method, in order to ensure that the product purity of benzene and toluene is not less than 99.9%, tower
The purity and yield of kettle mixed xylenes is difficult to ensure that, only 99.78%, while the stabilization time of whole tower is longer, more than 10hr；
If further increasing the thermic load of tower reactor reboiler, the purity of tower reactor mixed xylenes can be improved to 99.9%, but now public
Pressure difference below stripping section and dividing plate significantly increases, and rises to 3KPa by 0.5KPa, the stable operation of divided wall column is destroyed.
【Comparative example 2】
Formed using divided wall column same as Example 1 and raw material, control method as shown in Figure 3 is separated, and is controlled
It the results are shown in Table shown in 2.As can be seen that under the control method, the purity of benzene and toluene product is substantially relatively low, especially benzene, reason
It is, only controls the temperature of product side roof part column plate and the liquid phase distribution of bulkhead section both sides, effectively can only control in sideline product
The content of impurity benzene and dimethylbenzene, that is, control the product quality of side line toluene, but can not ensure overhead benzene and tower reactor dimethylbenzene
Product quality；Meanwhile in the control program, because the evaporation capacity in tower or gas-liquid flow are not controlled accordingly, cause product
Yield can not be effectively controlled, and the yield such as tower reactor mixed xylenes is significant lower, while the stabilization time of divided wall column also phase
To longer.
The control effect of 2 different control programs of table
Claims (10)
1. a kind of method of quality control of divided wall column, including following five control areas：
(1) feedstock control area：Feedstock amount is controlled using flow controller；
(2) overhead reflux and extraction control area：Using temperature controller control overhead condenser cold, using flow controller
Control overhead product produced quantity, tower top backflow volume is controlled using fluid level controller；
(3) control area is collected and distributed to liquid：Using fluid level controller control public rectifying section bottom distillate liquid flow,
Using the distribution liquid measure of temperature controller control bulkhead section feeding side；
(4) side take-off control area：Sideline product produced quantity is controlled using flow controller；
(5) tower reactor extraction control area：Using temperature controller control tower reactor reboiler heat, using fluid level controller control tower
Kettle product produced quantity.
2. the method for quality control of divided wall column according to claim 1, it is characterised in that in feedstock control area
Flow controller control is feedstock amount, and actual feedstock amount is automatically adjusted according to the feedstock amount of setting.
3. the method for quality control of divided wall column according to claim 1, it is characterised in that overhead reflux and extraction control zone
What the temperature controller in domain controlled is the temperature of the public rectifying section sensitive plate of divided wall column, according to this sensitive plate temperature automatic adjustment
Overhead condenser cold.
4. the method for quality control of divided wall column according to claim 1, it is characterised in that overhead reflux and extraction control zone
What the flow controller in domain controlled is overhead product produced quantity, and its flow is being entered according to feedstock amount and corresponding light component
Percentage composition in material composition automatically adjusts actual overhead product come what is set according to the product produced quantity of above-mentioned setting
Produced quantity.
5. the method for quality control of divided wall column according to claim 1, it is characterised in that overhead reflux and extraction control zone
What the fluid level controller in domain controlled is the liquid level of return tank of top of the tower, and top reflux flow rate is automatically adjusted according to the liquid level.
6. the method for quality control of divided wall column according to claim 1, it is characterised in that liquid is collected and distribution control zone
What the fluid level controller in domain controlled is the liquid level of the public rectifying section bottom liquid collecting zone of divided wall column, automatic according to the liquid level
Regulation bottom distillates the total flow of liquid.
7. the method for quality control of divided wall column according to claim 1, it is characterised in that liquid is collected and distribution control zone
What the temperature controller in domain controlled is the temperature of divided wall column bulkhead section feeding side sensitive plate, is adjusted automatically according to this sensitive plate temperature
Save the distribution liquid measure of feed side.
8. the method for quality control of divided wall column according to claim 1, it is characterised in that in side take-off control area
Flow controller control is sideline product produced quantity, and its flow is in charging group according to feedstock amount and corresponding intermediate species
Percentage composition in automatically adjusts actual sideline product according to the product produced quantity of above-mentioned setting and produced come what is set
Amount.
9. the method for quality control of divided wall column according to claim 1, it is characterised in that in tower reactor extraction control area
What temperature controller controlled is the temperature of the public stripping section sensitive plate of divided wall column, according to this sensitive plate temperature automatic adjustment tower reactor again
Boil device heat.
10. the method for quality control of divided wall column according to claim 1, it is characterised in that in tower reactor extraction control area
What fluid level controller controlled is the liquid level of divided wall column tower reactor, and tower reactor product produced quantity is automatically adjusted according to the liquid level.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112445254A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | System and method for controlling liquid level and tower top temperature of tower top condenser of dehydrocyanation tower |
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| CN112445254B (en) * | 2019-09-05 | 2022-11-08 | 中石油吉林化工工程有限公司 | System and method for controlling liquid level and tower top temperature of tower top condenser of dehydrocyanation tower |
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