CN106310696A - Gas phase distribution device of baffle plate tower - Google Patents
Gas phase distribution device of baffle plate tower Download PDFInfo
- Publication number
- CN106310696A CN106310696A CN201610927107.XA CN201610927107A CN106310696A CN 106310696 A CN106310696 A CN 106310696A CN 201610927107 A CN201610927107 A CN 201610927107A CN 106310696 A CN106310696 A CN 106310696A
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- China
- Prior art keywords
- plate
- gas
- tower
- column
- pressure drop
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Classifications
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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
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- 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
Abstract
The invention relates to a gas phase distribution device of a baffle plate tower. The gas phase distribution device is characterized by comprising an automatic liquid-level control system, a gas distributor, a pressure dropping adjusting plate and a tower plate with gas raising pipelines, wherein the tower plate with the gas raising pipelines is arranged in the baffle plate tower and is located below tower filling; the pressure dropping adjusting plate is located above the tower plate with the gas raising pipelines; the edge of the tower plate with the gas raising pipelines is connected to the tower wall of the baffle plate tower in a sealing manner; gaps are formed at two sides between the gas distributor and the tower wall of the baffle plate tower and between the pressure dropping adjusting plate and the tower wall of the baffle plate tower; the automatic liquid-level control system is arranged between the pressure dropping adjusting plate and the tower plate with the gas raising pipelines and is located on the external of the baffle plate tower; long holes are formed in a baffle plate located between the pressure dropping adjusting plate and the tower plate with the gas raising pipelines; a plurality of openings are formed in an area, located at a prefrationation section of the baffle plate tower, of the tower plate with the gas raising pipelines; and a gas raising pipeline is arranged at each opening.
Description
Technical field
The present invention relates to Chemical Engineering rectification separation field, the gas phase distributor of a kind of partitioned column.
Background technology
Rectification is the unit operation that in Chemical Manufacture, an energy consumption is the highest, and data shows according to statistics, and its energy consumption accounts for petrochemical industry
About the half of industry production total energy consumption.Therefore the energy saving research of distillation process has highly important meaning.In recent decades
Partitioned column based on complete thermal coupling distillation principle exploitation has been successfully obtained commercial Application.Partitioned column be mainly characterized by tower internal memory
At one or more dividing plate, will be divided into several independent gas liquid contact area or spaces in tower, each region is for difference
Key component complete different separation task and (be easiest to the weight concentration of component separated in major control one's respective area and middle
Concentration of component then allows the distribution having certain degree of freedom at top, one's respective area and bottom), by layers-separated, progressively refine,
Obtain the most much higher product of purity eventually.Therefore partitioned column is considered as the multitower sequence of tradition multicomponent separation by means of dividing plate
It is integrated in a tower.So, not only energy consumption is greatly saved, and can save distillation column and auxiliary device thereof, as reboiler,
Condenser, overhead reflux pump and pipeline, floor space reduces the most accordingly.
Partitioned column proposes to commercial Application from its concept, experiences the longest one period of developing period, the hottest coupling of tracing it to its cause
Close the system complexity that causes to increase, to its design, operate and the aspect such as control brings exceptional hardship.Wherein partitioned column internal mutual
Distribution and the realization of connection gas-liquid flow stock are exactly a very important influence factor.Research shows, liquids and gases distribution ratio is deposited
Optimize operating space at one, operate corresponding to lowest energy consumption in this region.If partitioned column is not in its optimum gas-liquid distribution ratio
Lower operation, then its power savings advantages will die down and even completely lose.
At present, the mode that commonly used gas freely distributes in dividing plate both sides, the ratio freely distributed is by partitioned column
Operation operating mode in portion's component such as packed height, the column plate number of plies, flow channel area etc. and tower determines, the uprising gas at the bottom of tower
Will comply with the equal rule of left and right sides pressure drop and be automatically assigned to dividing plate both sides.Due to feed composition and the change of state and
The allocation proportions of liquid etc. all can become affects the key factor that gas distributes, thus the gas stream automatically distributed in dividing plate both sides
Amount ratio usually can not reach the operating conditions that partitioned column is optimum.
Chinese patent CN105498268A discloses a kind of partitioned column gas phase flow rate control program, utilizes a self-circulating pump
Control the liquid level on the column plate of partitioned column side, manufacture the pressure drop that dividing plate both sides are different, to realize dividing plate both sides tower tray upward pressure
Difference.Because gaseous fluid can produce corresponding pressure drop through column plate, by control the pressure drop of partitioned column both sides difference, to every
Plate both sides gas phase flow rate controls accordingly.This device regulates gas phase flow rate simply by controlling pressure drop, is also comparable to
Freely distributing in dividing plate both sides, the ratio freely distributed can not accurately control.
Chinese patent CN205145640U discloses a kind of gas distributing device for rectifying tower with bulkhead, and this device passes through
In flow measurement device measurement inlet channel, the actual flow of gas, is then contained in air inlet according to flow by controller regulation and leads to
Dividing plate perforated area on road, the final flow regulating gas.The gas flow of this device simply regulation dividing plate both sides, and gas
Fluctuation situation be easy to have influence on measuring thus affecting the distribution of gas of flow.This device do not take into account pressure drop and ask simultaneously
Topic, pressure drop is one of most important factor affecting partitioned column separation efficiency.
Summary of the invention
It is difficult to control to and gas stream that dividing plate both sides are distributed automatically for the distribution of current commercial production median septum tower gas
Amount ratio usually can not reach the problem of partitioned column Optimum Operation situation, and the technical problem that the present invention intends to solve is to provide one
The gas phase distributor of partitioned column, this device can control to enter the amount of partitioned column both sides gas, can solve well simultaneously
The gas preparing of partitioned column and gas distribution problems.
The present invention solves described technical problem and the technical scheme is that the gas phase distributor providing a kind of partitioned column,
It is characterized in that this device includes automatic Control Systems of Liquids Height, gas distributor, pressure drop adjustable plate and with riser road column plate,
Described being arranged in partitioned column with riser road column plate, and be positioned at below inner-tower filling material, pressure drop adjustable plate is positioned at a liter gas
Above pipeline column plate, being connected with the tower wall closing of partitioned column with the edge of riser road column plate, gas distributor and pressure drop are adjusted
Joint plate and partitioned column tower wall between be equipped with gap in both sides, pressure drop adjustable plate and with riser road column plate between and position
Automatic Control Systems of Liquids Height is set outside partitioned column；At pressure drop adjustable plate with the dividing plate between riser road column plate
On elongated hole is set.
Described it be positioned at the region of partitioned column prefractionation section with riser road column plate and be provided with a number of perforate, Mei Gekai
All added with riser road on hole；Described pressure drop adjustable plate is positioned at the region of prefractionation section and main fractionating tower section and is equipped with perforate,
And the total open area being positioned at the region of prefractionation section is less than the total open area in the region being positioned at main distillation stage so that gas leads to
Cross distributor and keep consistent with rear bulkhead both sides pressure reduction.
A kind of partitioned column, this partitioned column is provided with above-mentioned gas phase distributor.
Compared with prior art, the invention has the beneficial effects as follows:
1) apparatus of the present invention simple in construction, flexible operation, economical and practical, the most easily controllable with install.Current dividing plate
The mode that the commonly used gas of tower freely distributes in dividing plate both sides, and apparatus of the present invention can automatically control partitioned column both sides gas
The distribution of amount；Owing to the allocation proportion etc. of feed composition and the change of state and liquid all can affect gas distribution, work as dividing plate
When the allocation proportion of both sides liquid changes, this device can be automatically adjusted the distribution shape of gas according to the situation of change of liquid
Condition, so that dividing plate both sides are constantly in partitioned column Optimum Operation situation, saves the waste of raw material and the energy.
2) gas distributing device of the present invention due to automatic Control Systems of Liquids Height be contained in pressure drop adjustable plate with riser road
Between column plate, can accurately control the height of liquid level, in order to the gas flow of dividing wall column dividing plate both sides is accurately divided
Joining, and the gas going out gas distributing device has been carried out pre-distribution, make uprising gas evenly, device volume is little, manipulation simplicity,
Achieve preferable technique effect.
3) gas distributing device of the present invention is by controlling air inflow, Ke Yi little with liquid level on riser road column plate 3
Amplitude changes air flow rate, it is also possible to significantly adjust the area of air inlet, and then significantly adjusts the flow of dividing plate both sides, because of
And the operating flexibility of the method is the biggest.
4) gas distributing device of the present invention has independent gas, fluid passage, enters into the air-liquid two in this device
The most respectively by respective passage flow, it is to avoid liquid contact with gas after the generation bad shadow such as entrainment and liquid flooding
Ring.
5) gas distributing device of the present invention have collection gas preparing and gas be distributed in one regulation advantage, in tower every
Elongated hole on plate solves the gas assignment problem of dividing plate both sides；After gas distributor makes gas distribution, distribution is more equal
Even, solve partitioned column dividing plate both sides gas preparing and a gas difficult problem pockety simultaneously.
Accompanying drawing explanation
Fig. 1 is the structure diagram of the gas phase distributor installation of partitioned column of the present invention；
Fig. 2 is that the structure with riser road column plate 3 of a kind of embodiment of gas phase distributor of partitioned column of the present invention is shown
It is intended to；
Fig. 3 is the structural representation of the pressure drop adjustable plate 2 of a kind of embodiment of gas phase distributor of partitioned column of the present invention；
Fig. 4 is the structural representation of the dividing plate 4 of a kind of embodiment of gas phase distributor of partitioned column of the present invention；
In figure, 1 gas distributor；2 pressure drop adjustable plates；3 with riser road column plate；4 dividing plates；5 liquid levels
Automatic control system.
Detailed description of the invention
It is described in further detail the present invention below in conjunction with embodiment and accompanying drawing, but does not want in this, as to the application right
Ask the restriction of protection domain.
The gas phase distributor of partitioned column of the present invention (being called for short device, see Fig. 1-4) include automatic Control Systems of Liquids Height 5,
Gas distributor 1, pressure drop adjustable plate 2 and with riser road column plate 3, described be arranged in tower with riser road column plate 3, and
Being positioned at below inner-tower filling material, pressure drop adjustable plate 2 is positioned at above with riser road column plate 3, and gas distributor 1 is positioned at pressure drop regulation
The top of plate 2, is connected with the tower wall closing of partitioned column with the edge of riser road column plate 3, gas distributor 1 and pressure drop regulation
Be equipped with gap in both sides between plate 2 and partitioned column tower wall, pressure drop adjustable plate 2 and with riser road column plate 3 between, and position
Automatic Control Systems of Liquids Height 5 is set outside partitioned column；Pressure drop adjustable plate 2 and with riser road column plate 3 between
Arranging elongated hole on dividing plate 4 (seeing Fig. 4), the perforated area of elongated hole sets according to actual production requirement, and gas is by riser
Being partly into prefractionation tower section while in road entrance partitioned column, another part is then entered main fractionating tower section by elongated hole；
Described it be positioned at the region of partitioned column prefractionation section with riser road column plate 3 and be provided with a number of perforate and (see
Fig. 2), added with riser road in each perforate, the region being positioned at main distillation stage is closed, i.e. not perforate；Described pressure drop adjustable plate 2
(seeing Fig. 3) is positioned at the region of prefractionation section and main fractionating tower section and is equipped with perforate, and is positioned at region total of prefractionation section
Perforated area is less than the total open area in the region being positioned at main distillation stage so that gas passes through distributor with rear bulkhead 4 both sides
Pressure reduction keeps consistent.
Further characteristic of the invention is that described automatic Control Systems of Liquids Height 5 uses RHFA liquid level controller.
Further characteristic of the invention is that the position that described dividing plate 4 has elongated hole is provided with deentrainment device.
The present invention also protects a kind of partitioned column being provided with above-mentioned gas phase distributor.
Operation principle and the process of gas phase distributor of the present invention be: by automatic Control Systems of Liquids Height to being back in tower
Flow be controlled, thus control with the liquid level on riser road column plate 3, with liquid on riser road column plate 3
The change of position height regulates the sectional area of the opened elongated hole of dividing plate 4, and final effect is equivalent to regulate the sectional area of elongated hole on dividing plate 4
Regulate entrance (on apparatus of the present invention median septum 4 area of elongated hole in design just it has been determined that only because band riser road tower
The difference of liquid level on plate 3, causes result to be equivalent to long hole area and changes) amount of the gas of main distillation stage；Gas by every
The amount of plate 4 is by with the Liquid level on riser road column plate 3, and height of liquid level is regulated by automatic Control Systems of Liquids Height 5, and liquid leads to
Cross automatic Control Systems of Liquids Height 5 to be back to tower reactor and be circulated；When dividing plate left and right sides liquid distribution ratio changes, can adjust
Joint makes the air inflow of both sides change therewith with the height of liquid level on riser road column plate 3, keeps both sides pressure drop the same；At dividing plate
There is deentrainment device at elongated hole on 4, prevent the gas excessive entrainment caused of speed.Gas distribution above pressure drop adjustable plate
Device so that distributing later gas distribution more uniformly, after entering partitioned column, gas-to-liquid contact is more complete.
The gas distributing device uprising gas of the present invention moves upward from riser road, and dropping liq then divides through gas
Cloth device 1, therefore rises along the gap of both sides between gas distributor 1 and pressure drop adjustable plate 2 and partitioned column tower wall along flowing downward
Gas and dropping liq have the most independent gas passage and fluid passage, enter into the biphase difference of the air-liquid in this device
By respective passage flow, it is to avoid liquid produces the harmful effect such as entrainment and liquid flooding after contacting with gas.
Apparatus of the present invention dividing plate bottom common partitioned column carries out perforate, by with the liquid on riser road column plate
Position is highly controlled by the gas flow of dividing plate, can distribute the gas of both sides and accomplish manual control, work as liquid simultaneously
When the fluid flow of body distributor changes, the amount of gas can change therewith so that the pressure drop of dividing plate both sides keeps consistent, permissible
Partitioned column is made to be constantly in efficient operation.
The present invention can be a common column plate with riser road column plate 3, be only positioned at prefractionation section region
Perforate, percent opening how relevant less than material variety specifically the most to be separated and composition, when air to be separated and water, percent opening
Controlling 4% preferably, its height rising feed channel is higher, is at least higher than with on riser road column plate 3
Liquid level, prevents liquid from flowing downward out from riser road；With riser road column plate 3 at the region inner sealing of main distillation stage.
Pressure drop adjustable plate 2 regulation dividing plate 4 both sides pressure reduction.The pressure drop of the whole tower of rectifying column is weigh tower performance one
Important indicator, and in partitioned column, the rule that the uprising gas at the bottom of general tower will comply with left and right sides pressure drop equal is automatically divided
It is fitted on dividing plate both sides, but due to the factor such as allocation proportion of feed composition and the change of state and liquid, makes dividing plate both sides
Pressure drop can not reach partitioned column Optimum Operation situation, and pressure drop adjustable plate 2 is less than in main fractional distillation at the perforated area of prefractionation section
The perforated area of section, the different perforated area in two regions makes the pressure drop by prefractionation section be divided to main by dividing plate with gas
The pressure drop of the section of evaporating is identical.
Embodiment 1
The gas phase distributor of the present embodiment partitioned column includes that automatic Control Systems of Liquids Height 5, gas distributor 1, pressure drop are adjusted
Joint plate 2 and with riser road column plate 3, described is arranged in tower with riser road column plate 3, and is positioned at below inner-tower filling material,
Pressure drop adjustable plate 2 is positioned at above with riser road column plate 3, and gas distributor 1 is positioned at the top of pressure drop adjustable plate 2, and gas divides
Cloth device 1, pressure drop adjustable plate 2 and the edge with riser road column plate 3 are all connected with the tower wall of partitioned column, at pressure drop adjustable plate 2
And between with riser road column plate 3, and it is positioned at outside partitioned column automatic Control Systems of Liquids Height 5 is set；It is being positioned at pressure drop regulation
Plate 2 and arrange elongated hole with on the dividing plate 4 between riser road column plate 3, while gas is entered in partitioned column by riser road
Being partly into prefractionation tower section, another part is then entered main fractionating tower section by elongated hole；
Described it be positioned at the region of partitioned column prefractionation section with riser road column plate 3 and be provided with a number of perforate, each
All added with riser road in perforate, the region being positioned at main distillation stage is closed, i.e. not perforate；Described pressure drop adjustable plate 2 is positioned at pre-point
It is equipped with perforate in the section of evaporating and the region of main fractionating tower section, and the perforated area being positioned at the region of prefractionation section divides less than being positioned at master
The perforated area in the region of the section of evaporating so that gas keeps consistent by distributor with rear bulkhead 4 both sides pressure reduction.
The present embodiment device is arranged in the freezing mask tower of an a diameter of 570mm, with riser road column plate 3 in prefractionation
The perforate of section is 7 diameter 50mm circular ports, and the riser road in perforate is by a diameter of 50mm, and height is the pipe structure of 300mm
Becoming, riser road is welded on the tapping of correspondence；Pressure drop adjustable plate 2 has an a diameter of 70mm in prefractionation section region
Round hole, the round hole having two a diameter of 70mm in main distillation stage region；The height of the elongated hole opened on dividing plate 4
Degree is 200mm, a length of 100mm, and this elongated hole controls to enter the gas flow of main distillation stage.
The mixture that material is air and water that the present embodiment is to be dispensed, the present embodiment is presented herein below at empty tower gas velocity is
The experimental data obtained during 1m/s:
By data above, the gas flow distribution ratio in both sides can be seen more intuitively, during empty tower gas velocity 1m/s,
Along with the rising of liquid level, gas phase flow rate is fewer and feweri by the flow of main distillation stage, and distribution ratio is reduced to 0.3 by 0.7, and divides in advance
The gas phase flow rate of the section of evaporating then rises to 0.7 from 0.3；So the present embodiment device can be to the distribution of partitioned column both sides gas phase flow rate
Accurately control.
Gas distributing device of the present invention controls the gas flow by dividing plate by liquid level so that the gas of dividing plate both sides
Amount ratio can be changed into 0.3:0.7 by 0.7:0.3, and in the industrial production, the gas flow ratio change of dividing plate both sides will not
Have so big, so the operating flexibility of device can meet the distribution requirement of industrial gas completely, control that can be strict
The gas flow of dividing plate both sides.
The present invention does not addresses part and is applicable to prior art.
Claims (4)
1. the gas phase distributor of a partitioned column, it is characterised in that this device includes that automatic Control Systems of Liquids Height, gas are distributed
Device, pressure drop adjustable plate and with riser road column plate, described be arranged in partitioned column with riser road column plate, and is positioned at tower
Below filler, pressure drop adjustable plate is positioned at above with riser road column plate, with edge and the partitioned column of riser road column plate
Tower wall is closed and is connected, and is equipped with gap in both sides between gas distributor and pressure drop adjustable plate and partitioned column tower wall, adjusts in pressure drop
Joint plate and with between riser road column plate and be positioned at outside partitioned column and arrange automatic Control Systems of Liquids Height；Adjust being positioned at pressure drop
Save plate and elongated hole is set with on the dividing plate between riser road column plate；
Described it be positioned at the region of partitioned column prefractionation section with riser road column plate and be provided with a number of perforate, in each perforate
All added with riser road；Described pressure drop adjustable plate is positioned at the region of prefractionation section and main fractionating tower section and is equipped with perforate, and position
Total open area in the region of prefractionation section is less than the total open area in the region being positioned at main distillation stage so that gas is by dividing
Equipped putting keeps consistent with rear bulkhead both sides pressure reduction.
Gas phase distributor the most according to claim 1, it is characterised in that described automatic Control Systems of Liquids Height uses RHFA
Liquid level controller.
Gas phase distributor the most according to claim 1, it is characterised in that described dividing plate has the position of elongated hole and is provided with
Deentrainment device.
4. a partitioned column, it is characterised in that this partitioned column is provided with the arbitrary described gas phase distributor of claim 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610927107.XA CN106310696B (en) | 2016-10-31 | 2016-10-31 | A kind of gas phase distributor of partitioned column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610927107.XA CN106310696B (en) | 2016-10-31 | 2016-10-31 | A kind of gas phase distributor of partitioned column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106310696A true CN106310696A (en) | 2017-01-11 |
| CN106310696B CN106310696B (en) | 2018-03-16 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610927107.XA Active CN106310696B (en) | 2016-10-31 | 2016-10-31 | A kind of gas phase distributor of partitioned column |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914027A (en) * | 2017-04-05 | 2017-07-04 | 河北工业大学 | A kind of gas phase distributor |
| CN111921218A (en) * | 2020-08-03 | 2020-11-13 | 章丘市胜隆化工有限公司 | Production equipment and production process of mixed aromatic hydrocarbon |
| CN112675563A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Gas phase regulating unit for a dividing wall column and dividing wall column comprising a gas phase regulating unit |
| CN112933647A (en) * | 2019-12-10 | 2021-06-11 | 中国石油化工股份有限公司 | Gas phase distribution control device and partition plate rectifying tower using same |
| CN115121139A (en) * | 2022-03-29 | 2022-09-30 | 上海良薇机电工程有限公司 | Liquid source bubbler |
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| CN204601655U (en) * | 2015-02-17 | 2015-09-02 | 天津奥展兴达化工技术有限公司 | Column plate assembly falls in the gas distribution structure of iris type rectifying column and pressure regulation |
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| US4230533A (en) * | 1978-06-19 | 1980-10-28 | Phillips Petroleum Company | Fractionation method and apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106914027A (en) * | 2017-04-05 | 2017-07-04 | 河北工业大学 | A kind of gas phase distributor |
| CN112675563A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Gas phase regulating unit for a dividing wall column and dividing wall column comprising a gas phase regulating unit |
| CN112675563B (en) * | 2019-10-18 | 2022-08-09 | 中国石油化工股份有限公司 | Gas phase regulating unit for a dividing wall column and dividing wall column comprising a gas phase regulating unit |
| CN112933647A (en) * | 2019-12-10 | 2021-06-11 | 中国石油化工股份有限公司 | Gas phase distribution control device and partition plate rectifying tower using same |
| CN112933647B (en) * | 2019-12-10 | 2022-07-08 | 中国石油化工股份有限公司 | Gas phase distribution control device and partition plate rectifying tower using same |
| CN111921218A (en) * | 2020-08-03 | 2020-11-13 | 章丘市胜隆化工有限公司 | Production equipment and production process of mixed aromatic hydrocarbon |
| CN115121139A (en) * | 2022-03-29 | 2022-09-30 | 上海良薇机电工程有限公司 | Liquid source bubbler |
| CN115121139B (en) * | 2022-03-29 | 2023-08-25 | 上海良薇机电工程有限公司 | Liquid source bubbler |
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| CN106310696B (en) | 2018-03-16 |
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