CN106147821B - A kind of naphtha extracts preprocessing method of raw materials - Google Patents
A kind of naphtha extracts preprocessing method of raw materials Download PDFInfo
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- CN106147821B CN106147821B CN201510135818.9A CN201510135818A CN106147821B CN 106147821 B CN106147821 B CN 106147821B CN 201510135818 A CN201510135818 A CN 201510135818A CN 106147821 B CN106147821 B CN 106147821B
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Abstract
The present invention discloses a kind of naphtha extracting preprocessing method of raw materials, including following content：Naphtha extracting raw material enters demarcation strip rectifying tower, isolated overhead light-end oil, side line intermediate oil and bottom of towe heavy distillate；The demarcation strip rectifying column, including along the axially arranged demarcation strip of the demarcation strip rectifying column, and the gas distribution plate that the drive shaft is fixedly connected on along the gas distribution plate drive shaft and one end of the radial direction of the demarcation strip rectifying column is provided with below the demarcation strip, the gas distribution plate is pivoted around the gas distribution plate drive shaft, to control distribution of the logistics below the gas distribution plate in the space of the demarcation strip both sides.This method have it is simple to operate, the advantages of good separating effect.
Description
Technical field
Preprocessing method of raw materials is extracted the present invention relates to a kind of naphtha.
Technical background
Feed naphtha, which carries out Aromatics Extractive Project, can cause the benefit of raw material to be achieved maximization, due to feed naphtha
Compositional range it is wider, contained light component and proportion shared by heavy constituent are larger in its raw material, and are free of in this constituent part
Aromatic hydrocarbons, therefore be not suitable for entering extraction device, the disposal ability of device only otherwise can be taken, and can also cause extraction solvent
Extraneoas loss, therefore naphtha extracting raw material is pre-processed and just seems very necessary.
The preprocess method generally used is to carry out rectifying separation to it.Distillation technology is also to apply in chemical field in itself
Most commonly used unit operation, is also energy consumption and the higher part of investment in industrial process simultaneously though there is many advantages.Hot coupling
Rectifying be 40 ~ fifties of 20th century propose a kind of complex distillation mode, it can reduce during irreversible effective energy loss
Lose, so as to reduce the energy consumption of process.Theoretical and example proves that it is average reachable that hot coupling rectifying column reduces energy consumption than conventional rectification scheme
30% or so.The distillation process of three products is obtained for ternary mixture separation or separating mixture, hot coupling rectifying column is divided into
Petlyuk rectifying columns and vertical demarcation strip rectifying column.The two is thermodynamically of equal value, but vertical demarcation strip rectifying column can enter
One step reduces equipment investment.Vertical demarcation strip rectifying column refers to set a vertical partition plate inside rectifying column, rectifying column is split
The feed zone separated into tower top section, bottom of towe section and by dividing plate and middle sideline product extraction four major parts of section.With tradition
Two conventional tower sequence flows compare, can save energy 30-60%, save equipment investment 30% or so, and operation capacity increases.
The liquid backflow used in United States Patent (USP) US4230533 is, using liquid level difference as power, to be adjusted by flowmeter；Bottom of towe
Uprising gas is realized between distribution regulation, and liquid backflow distribution and gas distribution by way of by-passing without mutual
Association.Divided wall column in United States Patent (USP) USPA5755933 is that demarcation strip is extended to the top or bottom of divided wall column, is then passed through
Condenser or boil again flows back respectively.A kind of control method of demarcation strip rectifying column, the party are described in United States Patent (USP) US7267746
Method is to add the logistics containing different component in the different parts of tower respectively, to form liquid backflow control, and with tower top
Temperature is regulating index, and the logistics flux for entering tower is adjusted.But in above-mentioned technology, exist, overhead reflux liquid with
Bottom of towe uprising gas can not realize the shortcoming of independent control.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of method that naphtha extracts pretreatment of raw material, this method tool
Have simple to operate, the advantages of good separating effect.
A kind of naphtha extracts preprocessing method of raw materials, including following content：Naphtha extracting raw material enters demarcation strip essence
Evaporate tower tower, isolated overhead light-end oil, side line intermediate oil and bottom of towe heavy distillate；The demarcation strip rectifying column, bag
Include along the axially arranged demarcation strip of the demarcation strip rectifying column, and be provided with below the demarcation strip along the demarcation strip rectifying
The gas distribution plate drive shaft of the radial direction of tower and one end are fixedly connected on the gas distribution plate of the drive shaft, the gas
Flow distribution plate is pivoted around the gas distribution plate drive shaft, to control the logistics below the gas distribution plate
Distribution in the space of the demarcation strip both sides, demarcation strip both sides set liquid collecting plate, on liquid collecting plate arrangement rise inflator with
And the external downspout being connected with liquid collecting plate, external downspout, which is used to lead back liquid in rectifying column, described liter of inflator, to be set
Holes probe for determining gas flow rate.
In the inventive method, the operating condition of demarcation strip rectifying column is as follows：Demarcation strip rectifying column is provided with 10~60 pieces of theories
Plate, preferably 37~52 blocks plates, tower top section sets 6~10 pieces of theoretical plates, bottom of towe section to set 15~20 pieces of theoretical plates, feed zones to set
Put 16~22 pieces of theoretical plates, middle sideline product extraction section sets 16~22 pieces of theoretical plates, the rate of gasification of charging is about 20%~
50%, operating pressure is 0.1Mpa~0.3Mpa.
In the inventive method, demarcation strip both sides away from demarcation strip bottom vertical range be 0.1~0.5 meter, preferably 0.1~
Liquid collecting plate is set at 0.3 meter.Radial level of the liquid collecting plate along tower is placed, liquid collecting plate circumferentially with tower body inwall and demarcation strip
Weld together.
In the inventive method, described liter of inflator is circle, and is distributed in by the plane of symmetry of demarcation strip on the liquid collecting plate of both sides.
Several liter of inflator is set on the semicircular liquid collecting plate in every side, inflator top is risen and herringbone calotte, bottom and liquid collecting is set
Plate weld together, and can be with space insertion in the tower of liquid collecting plate bottom.
In the inventive method, external downspout is used to lead back liquid in rectifying column, introduces position and is hung down away from demarcation strip bottom
Straight distance is 1/2D~3/4D, preferably 1/2D~2/3D（D is tower internal diameter）.The external downspout is dropped by liquid guiding tube, longitudinal direction
Liquid pipe and backflow recurrent canal three part are welded.Liquid guiding tube is laterally disposed, and central transverse axis and the demarcation strip of liquid guiding tube are indulged
Intersecting to central axis upright, the lower edge of liquid guiding tube outer wall and the upper limb of liquid collecting plate are in same level, liquid guiding tube and tower body
Insertion welds together.The recurrent canal transverse horizontal that flows back is placed, and curved in lateral part setting up concave type " U " type, and backflow is returned
Return pipe welds together with tower body insertion.The external downspout sets two-way altogether, and using demarcation strip as the plane of symmetry it is placed longitudinally
The both sides of tower.
In the inventive method, holes probe is horizontally inserted in liter inflator from a liter inflator longitudinally middle position, holes probe position
At liter inflator inside center axial location.
In the inventive method, the gas distribution plate drive shaft can drive the rotation of gas flow distribution plate.
In the present invention, the gas distribution plate is arranged so that the gas distribution plate can stop from the gas
Logistics below body stream plate enters the atomisation station in demarcation strip side space and can stopped from the gas distribution plate
The logistics of lower section is rotated between entering the second place in the demarcation strip opposite side space.It specifically can be described as the gas distribution
The rotational angle of plate is 90 °~-90 °, preferably 80 °~-80 °（On the basis of the axis of demarcation strip rectifying column）.
In the present invention, demarcation strip and gas the flow distribution plate drive shaft is in the same axle of the demarcation strip rectifying column
In plane.That is, in the plane residing for central axis in demarcation strip rectifying column.
In the present invention, the cross section of the demarcation strip rectifying column is circle, and the gas distribution plate is crown for circle.Tool
Body can be described as, and the straight flange of the gas distribution plate is parallel with demarcation strip, and length of straight flange is identical with tower body internal diameter, gas distribution plate
The distance at arc-shaped side summit and flow distribution plate straight flange midpoint be 1/8D~1/2D, preferably 1/3D~1/2D（D is tower internal diameter）.
In the present invention, the cross-sectional area in demarcation strip both sides space is identical, and the circle hat string of the gas distribution plate
Length is identical with the internal diameter of the demarcation strip rectifying column, and the circle crown portion of the gas distribution plate and the distance of string are less than described separate
The center of plate rectifying column to the demarcation strip rectifying inner wall of tower distance.
In the present invention, the gas distribution plate is fixedly connected with gas distribution plate drive shaft, and the gas distribution plate
Drive shaft can rotate and the gas distribution plate, the gas distribution are rotated under the drive of gas distribution plate drive shaft turns
Plate drive shaft demarcation strip bottom place, and with demarcation strip bottom realize it is seamless be in rolling contact, and the gas distribution plate drive
One end of axle is carried on tower body inwall, and the other end is connected through tower body with pivoting controller.
In the present invention, the demarcation strip rectifying column can include tower body, demarcation strip, and tower body is divided into tower by the demarcation strip
Section, bottom of towe section, feed zone and middle four parts of sideline product extraction section are pushed up, the demarcation strip rectifying column also includes being used for gas
The gas distribution plate and drive shaft of shunting, the gas distribution plate are crown in circle, and the straight flange and drive shaft of gas distribution plate are fixed
Connection simultaneously can be under the drive of drive shaft in bottom of towe section rotation, and the drive shaft is placed in demarcation strip bottom, and and demarcation strip
Bottom realize it is seamless be in rolling contact, one end of drive shaft is carried on tower body inwall, and the other end connects through tower body with pivoting controller
Connect.The demarcation strip is placed along tower body central axis, and the center of demarcation strip is consistent with the center of tower body；The length of demarcation strip is
0.3H~0.9H, preferably 0.4H~0.8H（H is tower height）The pivoting controller can use electric and pneumatic control, can be with
Realize that continuous rotate is adjusted, degree of regulation is 0.3 °~0.5 °.
In the present invention, the pivoting controller can use electric and pneumatic control, it is possible to achieve continuous to rotate regulation, adjust
It is 0.3 °~0.5 ° to save precision.
In the present invention, be provided with above the demarcation strip along the second axle of the radial direction of the demarcation strip rectifying column with
And one end is fixedly connected on the second flow distribution plate of second axle, second flow distribution plate is pivoted around the second axle,
To control distribution of the logistics above second flow distribution plate in the space of the demarcation strip both sides.
In the present invention, second axle can drive the rotation of the second flow distribution plate.
In the present invention, second flow distribution plate is arranged so that second flow distribution plate can stop from described second
Logistics above flow distribution plate enters the 3rd position in demarcation strip side space and can stopped above second flow distribution plate
Logistics enter demarcation strip opposite side space the 4th position between rotate.It specifically can be described as turning for second flow distribution plate
Dynamic angle is 90 °~-90 °, preferably 80 °~-80 °（On the basis of the axis of demarcation strip rectifying column）.
In the present invention, the demarcation strip and the second axle are on the same axial plane of the demarcation strip rectifying column.That is, it is in
In plane residing for the central axis of demarcation strip rectifying column.
In a preferred embodiment of the present invention, the cross section of the demarcation strip rectifying column is circle, and second point
Flow plate crown for circle.Specifically it can be described as, the straight flange of second flow distribution plate is parallel with demarcation strip, length of straight flange and tower body internal diameter
Identical, the arc-shaped side summit of the second flow distribution plate is 1/8D~1/2D, preferably 1/4D~1/ with the distance at flow distribution plate straight flange midpoint
2D（D is tower internal diameter）.
In the present invention, the cross-sectional area in demarcation strip both sides space is identical, and the circle hat chord length of second flow distribution plate
Identical with the internal diameter of the demarcation strip rectifying column, the circle crown portion of second flow distribution plate and the distance of circle hat string are less than described point
The center of dividing wall column to the demarcation strip rectifying inner wall of tower distance.
In the present invention, second flow distribution plate and it is fixedly connected with the second axle, and second axle can be rotated and
Second flow distribution plate is rotated under the drive of the rotation of two axles, second axle is placed at the top of demarcation strip, and with demarcation strip top
Portion realize it is seamless be in rolling contact, and one end of second axle is carried on tower body inwall, and the other end is controlled through tower body with rotating
Device is connected.
In a specific embodiment, the demarcation strip rectifying column can include tower body, demarcation strip, and the demarcation strip will
Tower body is divided into tower top section, bottom of towe section, feed zone and middle four parts of sideline product extraction section, and the demarcation strip rectifying column is also wrapped
Include the second flow distribution plate and the second axle for separating liquid, second flow distribution plate is crown in circle, the straight flange of the second flow distribution plate and
Second axle is fixedly connected and can be under the drive of rotary shaft in tower top section rotation, and the rotary shaft is placed at the top of demarcation strip,
And with realized at the top of demarcation strip it is seamless be in rolling contact, one end of the second axle is carried on tower body inwall, and the other end is through tower body with turning
Movement controller is connected.The demarcation strip is placed along tower body central axis, and the center of demarcation strip is consistent with the center of tower body；Separate
The length of plate is 0.3H~0.9H, preferably 0.4H~0.8H（H is tower height）.The pivoting controller can use electronic or gas
Dynamic control, it is possible to achieve continuous to rotate regulation, degree of regulation is 0.3 °~0.5 °.
In the present invention, the course of work for the gas distribution plate of gas distribution is：Flow detector detection point first
Dividing plate both sides rise the gas flow rate in inflator, and send the flow velocity signal measured to pivoting controller, pivoting controller according to
The calculation procedure of setting calculates the gas distribution ratio of demarcation strip both sides, and the gas distribution ratio of it and setting is compared
Compared with, according to both differences, logic analysis is carried out, and regulating command is made, rotary shaft is adjusted by pivoting controller, and thus adjust
Whole gas distribution plate is turned on desired position.
In the demarcation strip rectifying column for including above-mentioned gas flow distribution plate and the second flow distribution plate at the same time, above-mentioned gas flow distribution plate and
Second flow distribution plate is simultaneously operable, while carrying out point to the logistics below demarcation strip and the logistics above demarcation strip
Stream.
Specifically, a kind of naphtha extracting raw material of the invention uses the method that new demarcation strip rectifying column is pre-processed
Have the following advantages that：
（1）Method provided by the present invention, instead of in conventional double tower separation process, simplifies technological process, reduce
Installation area.
（2）Gas phase distribution inside tower and detection work are integrated in demarcation strip rectifying column by method provided by the present invention
Inside is completed, and is simplified the external attached structure of tower body, is simplified the design of tower, reduce equipment investment；
（3）Method provided by the present invention is solved can not individually detect gas phase flow rate inside tower under gas-liquid two-phase environment
Problem, realize the detection to gas phase flow velocity in the case where gas-liquid two-phase coexists；
（4）Demarcation strip rectifying column provided by the present invention can cause the gas phase of demarcation strip both sides in tower to distribute and liquid phase point
With realizing separately adjustable control, it is possible to which accurate control is realized in gas phase distribution and liquid phase distribution to demarcation strip both sides；
（5）The control method that the present invention is provided is simple to operate, is easy to regulation.
Embodiment
Fig. 1 uses the schematic diagram that new demarcation strip rectifying column is pre-processed for a kind of naphtha extracting raw material of the invention；
Fig. 2 is demarcation strip rectifying column side view
Fig. 3 is that gas distributes control system figure；
Fig. 4 is that liquid distributes control system figure；
Fig. 5 is liter inflator layout drawing；
Fig. 6 is gas distribution plate figure；
Fig. 7 is the second flow distribution plate figure；
Reference：
10- demarcation strip rectifying columns；11- demarcation strips；12- gas-liquid partition trays；The axles of 13- second；14- gas-liquid partition trays；15- gas
Liquid distribution plate；The flow distribution plates of 16- second；17- gas-liquid partition trays；18- rises inflator；19- flow velocity somascopes；20- gas distributions plate drives
Moving axis；The external downspouts of 21-；22- gas-liquid partition trays；23- gas distribution plates；The external downspouts of 24-；25- liquid collecting plates；26- flows
Fast somascope；27- rises inflator；28- pivoting controllers；29- pivoting controllers；
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the present invention is applied whereby
Technological means solves technical problem, and reaches the implementation process of technique effect and can fully understand and implement according to this.Need explanation
As long as not constituting each embodiment in conflict, the present invention and each feature in each embodiment can be combined with each other,
The technical scheme formed is within protection scope of the present invention.
As shown in figs. 1-7, the demarcation strip rectifying column includes demarcation strip 11, gas-liquid partition tray 12, gas-liquid partition tray 14, gas
Liquid distribution plate 15, gas-liquid partition tray 17, gas-liquid partition tray 22, the second flow distribution plate 16, gas distribution plate 23 etc..Said structure is by institute
State demarcation strip rectifying column and be broadly divided into I areas, II areas, III areas and VI areas.Wherein between gas-liquid partition tray 14 and gas-liquid partition tray 15
Space be I areas, the both sides space that demarcation strip 11 is separated is respectively II areas（Feed zone）Taken with III（Side take-off section）, gas
The lower section of liquid distribution plate 22 is IV areas.
The demarcation strip is placed along tower body central axis, and the center of demarcation strip 11 is consistent with the center of tower body；Demarcation strip
11 length is 0.3H~0.9H, preferably 0.4H~0.8H（H is tower height）.The rotational angle of second flow distribution plate 16 is
90 °~-90 °, preferably 80 °~-80 °（On the basis of the axis of demarcation strip rectifying column）.The rotation of the gas distribution plate 23
Angle is 90 °~-90 °, preferably 80 °~-80 °（On the basis of the axis of demarcation strip rectifying column）.
The straight flange of second flow distribution plate 16 and the second axle 13 are fixedly connected and can be under the drives of rotary shaft in tower top
Section is rotated, and the rotary shaft places at the top of demarcation strip, and with realized at the top of demarcation strip 11 it is seamless be in rolling contact, the one of rotary shaft
End is carried on tower body inwall, and the other end is connected through tower body with pivoting controller 28.The demarcation strip 11 hangs down along tower body center line
Straight to place, the center of demarcation strip is consistent with the center of tower body；The length of demarcation strip 11 be 0.3H~0.9H, preferably 0.4H~
0.8H（H is tower height）.The pivoting controller 28 can use electric and pneumatic control, it is possible to achieve continuous to rotate regulation, adjust
It is 0.3 °~0.5 ° to save precision.
The straight flange of the gas distribution plate 23 be fixedly connected with gas flow distribution plate drive shaft 20 and can rotary shaft band
Rotated under dynamic in bottom of towe section, the rotary shaft is placed in the bottom of demarcation strip 11, and realize that seamless rolling connects with the bottom of demarcation strip 11
Touch, one end of rotary shaft is carried on tower body inwall, and the other end is connected through tower body with pivoting controller 29.The edge of demarcation strip 11
Tower body central axis is placed, and the center of demarcation strip 11 is consistent with the center of tower body；The length of demarcation strip 11 is 0.3H~0.9H,
Preferably 0.4H~0.8H（H is tower height）The pivoting controller 29 can use electric and pneumatic control, it is possible to achieve continuous
Regulation is rotated, degree of regulation is 0.3 °~0.5 °.
Enter component of the logistics to be separated 1 containing three kinds or more of demarcation strip rectifying column in the present invention, certain
Under conditions of enter in demarcation strip rectifying column 10, feed stream carries out flash separation first in IIth area, the gas phase isolated
Rise the gas with out of III area rising in IIth area on the top of the second flow distribution plate 16 to converge, be distributed through gas-liquid partition tray 14
Risen into after even in Ith area, after the gas and the liquid countercurrent of overhead reflux risen in Ith area is separate, gas phase is by tower
Push pipe road is drawn, after being condensed through overhead condenser, and a part is produced as overhead product via pipeline 2, and a part is used as tower top
Backflow is returned in tower, and through gas-liquid partition tray 15 carry out it is uniform after as Ith area backflow.The liquid flowed back out of I area is through liquid
After diverter control system shunting, according to allocation proportion as defined in control system, separately flow into the both sides at the top of demarcation strip 11, from point
After the liquid of two side refluxs of the top of dividing plate 11 is uniformly distributed by gas-liquid partition tray 12, carried out with the gaseous stream of rising
It separate.In the side take-off side of demarcation strip rectifying column, sideline product is through the carrying device of pipeline 3.Returned from the both sides of demarcation strip 11
The liquid of stream is returned after the liquid collecting plate 25 symmetrical through the two bottom sides of demarcation strip 11 is collected via external downspout 21 and 24
In tower, through gas-liquid partition tray 22 it is uniform after enter IVth area, and rise in demarcation strip both sides liquid collecting plate in inflator, form two pure gas
The space of phase fluid, sets gas flow rate detector 19 and 26 at two, for measuring from tower reactor in the gaseous fluid space
The gas flow rate risen, the detection signal of gas flow rate detector is transferred to pivoting controller 29, and logic is carried out through pivoting controller
After analysis, make control instruction and perform.The gas risen from tower reactor passes through gas and distributes distribution of the control system according to regulation
After ratio is allocated, the both sides of demarcation strip 11 are ascended into through liter inflator respectively, after being carried out uniformly through gas-liquid partition tray 17, with
The liquid flowed back from tower top divider plate both sides is separate.A kettle material part is returned in tower after circulating-heating,
Another part is extracted out as bottom product through pipeline 4.
In the present invention, separating liquid control system of the liquid distribution ratio of the top both sides of demarcation strip 11 at the top of demarcation strip
To be adjusted.The demarcation strip both sides liquid distribution ratio first in the partitioned column that pivoting controller 28 is proposed according to technological operation
Requirement, by the calculation procedure that defines of inside, analysis calculates to reach what is adjusted needed for given liquid distribution ratio
The rotational angle of second flow distribution plate 16, and execute instruction is sent, the second axle 13 is adjusted by pivoting controller 28, and thus adjust liquid
Body flow distribution plate is turned on desired position.
In the present invention, the gas distribution ratio of demarcation strip two bottom sides by demarcation strip bottom gas distribute control system Lai
It is adjusted.Detect that demarcation strip both sides rise the gas flow rate in inflator respectively by flow detector 19 and 26 first, and will survey
The flow velocity signal obtained sends pivoting controller 29 to, and pivoting controller calculates demarcation strip both sides according to the calculation procedure of setting
Gas distribution ratio, and the gas distribution ratio of it and setting is compared, according to both differences, carries out logic analysis, and
Regulating command is made, gas distribution plate drive shaft 20 is adjusted by pivoting controller, and thus adjustment gas distribution plate 23 is turned to
On desired position.
The solution of the present invention and effect are further illustrated below by embodiment.In embodiment, such as Fig. 1-7, demarcation strip
A diameter of 0.4m of rectifying column, the second flow distribution plate is semicircle, and radius is 0.2m, and the area of the second flow distribution plate is 0.063m2；Gas
The arc-shaped side summit of body flow distribution plate is 0.14m with the distance at gas distribution plate straight flange midpoint, and the area of gas distribution plate is
0.04m2；It is highly 0.1m to rise inflator, and it is 0.05m to rise inflator internal diameter；The holes probe of flow detector is separately mounted to separate
In the liter inflator of plate plate both sides, holes probe is horizontally inserted inside liter inflator, and length of the holes probe inside liter inflator is
0.02m, distance of the holes probe away from liquid collecting plate is 0.05m.
Embodiment 1
By naphtha extracting raw material feeding dividing wall column essence provided with 40 piece theoretical plate of the temperature for 130 DEG C of 600kg/h
In evaporating, tower top section sets 8 pieces of theoretical plates, and bottom of towe section sets 18 pieces of theoretical plates, and feed zone sets 14 pieces of theoretical plates, middle side line production
Product extraction section sets 14 pieces of theoretical plates, and the rate of gasification of charging is about 20%, and the operating pressure of dividing wall column is 0.15Mpa, condenser
Temperature is 67 DEG C, and it is 140 DEG C, 208 DEG C of bottom temperature that intermediate oil, which extracts temperature out,.
Tower top light oil distillate flow rate is 30.0 kg/h, and intermediate oil product flowrate is 450.0kg/h, heavy oil fraction production
The flow rate of product is 120kg/h.
Divided-wall distillation column basic operation parameter is as shown in table 1：
The dividing wall column basic operation parameter of table 1
Separating effect is as shown in table 2：
The product separating effect of table 2
Embodiment 2
By hydrocracked product feeding divided-wall distillation column provided with 52 piece theoretical plate of the temperature for 142 DEG C of 700kg/h
In, tower top section sets 10 pieces of theoretical plates, and bottom of towe section sets 25 pieces of theoretical plates, and feed zone sets 17 pieces of theoretical plates, middle side line production
Product extraction section sets 17 pieces of theoretical plates, and the rate of gasification of charging is 50%, and the operating pressure of dividing wall column is 0.1Mpa.
Tower top light oil distillate flow rate is 56.0 kg/h, and intermediate oil product flowrate is 525.0kg/h, heavy oil fraction production
The flow rate of product is 119.0kg/h.
Divided-wall distillation column basic operation parameter is as shown in table 3：
The dividing wall column basic operation parameter of table 3
Separating effect is as shown in table 4：
The product separating effect of table 4
Claims (18)
1. a kind of naphtha extracts preprocessing method of raw materials, it is characterised in that：Including following content：Naphtha extracting raw material enters
Demarcation strip rectifying column, isolated overhead light-end oil, side line intermediate oil and bottom of towe heavy distillate；The demarcation strip rectifying
Tower, including be provided with along the axially arranged demarcation strip of the demarcation strip rectifying column, and below the demarcation strip along the separation
The gas distribution plate drive shaft of the radial direction of plate rectifying column and one end are fixedly connected on the gas distribution plate of the drive shaft, institute
State gas distribution plate to pivot around the gas distribution plate drive shaft, to control below the gas distribution plate
Distribution of the logistics in the space of the demarcation strip both sides, liquid collecting plate is set in demarcation strip both sides, arranges and rises on liquid collecting plate
Inflator and the external downspout being connected with liquid collecting plate, external downspout are used to liquid leading back rectifying column, described liter of inflator
Inside it is provided for determining the holes probe of gas flow rate.
2. according to the method described in claim 1, it is characterised in that：It is away from demarcation strip bottom vertical range in demarcation strip both sides
Liquid collecting plate is set at 0.1~0.5 meter, and radial level of the liquid collecting plate along tower is placed, liquid collecting plate circumferentially with tower body inwall and
Demarcation strip welds together.
3. according to the method described in claim 1, it is characterised in that：Described liter of inflator is circle, and using demarcation strip as the plane of symmetry
It is distributed on the liquid collecting plate of both sides, several liter of inflator is set on the semicircular liquid collecting plate in every side, rises inflator top and set
Herringbone calotte, bottom welds together with liquid collecting plate, and can be with space insertion in the tower of liquid collecting plate bottom.
4. according to the method described in claim 1, it is characterised in that：External downspout is used to lead back liquid in rectifying column, draws
It is 1/2D~3/4D to enter position away from demarcation strip bottom vertical range, and D is tower internal diameter.
5. according to the method described in claim 1, it is characterised in that：The external downspout by liquid guiding tube, longitudinal downspout and
Backflow recurrent canal three part is welded.
6. method according to claim 5, it is characterised in that：Liquid guiding tube is laterally disposed, the central transverse axis of liquid guiding tube
Intersected vertically with demarcation strip longitudinal center axis, the lower edge of liquid guiding tube outer wall and the upper limb of liquid collecting plate draw in same level
Liquid pipe welds together with tower body insertion, and backflow recurrent canal transverse horizontal is placed, and sets up concave type " U " type in lateral part
Curved, backflow recurrent canal welds together with tower body insertion.
7. according to the method described in claim 1, it is characterised in that：The external downspout sets two-way altogether, and using demarcation strip as
The placed longitudinally both sides in tower of the plane of symmetry.
8. according to the method described in claim 1, it is characterised in that：Holes probe is horizontally inserted from a liter inflator longitudinally middle position
Rise in inflator, holes probe, which is located at, to be risen at inflator inside center axial location.
9. according to the method described in claim 1, it is characterised in that the gas distribution plate drive shaft can drive gas flow distribution plate
Rotation.
10. according to the method described in claim 1, it is characterised in that the cross section of the demarcation strip tower is circle, and described point
Flow plate crown for circle.
11. method according to claim 10, it is characterised in that the cross-sectional area in demarcation strip both sides space is identical,
And the circle hat chord length of the flow distribution plate is identical with the internal diameter of the demarcation strip tower, the circle crown portion of the flow distribution plate and the distance of string
Less than the demarcation strip tower center to the demarcation strip inner wall of tower distance.
12. method according to claim 1, it is characterised in that be provided with above the demarcation strip along the demarcation strip tower
Second axle of radial direction and one end are fixedly connected on the second flow distribution plate of second axle, and second flow distribution plate surrounds institute
State the second axle to pivot, to control the logistics above second flow distribution plate in the space of the demarcation strip both sides
In distribution.
13. method according to claim 12, it is characterised in that second axle can drive the rotation of the second flow distribution plate.
14. method according to claim 13, it is characterised in that second flow distribution plate is arranged so that described second point
Stream plate can stop the logistics above second flow distribution plate enter demarcation strip side space the 3rd position and can
Rotated between the 4th position for stopping the opposite side space that the logistics above second flow distribution plate enters demarcation strip.
15. method according to claim 14, it is characterised in that the cross section of the demarcation strip tower is circle, and second
Flow distribution plate is crown for circle.
16. method according to claim 15, it is characterised in that the cross-sectional area in demarcation strip both sides space is identical,
And second flow distribution plate circle hat chord length it is identical with the internal diameter of the demarcation strip tower, the circle crown portion of second flow distribution plate and
The distance of circle hat string is less than the center of the demarcation strip tower to the distance of the demarcation strip inner wall of tower.
17. method according to claim 16, it is characterised in that second flow distribution plate and the second axle are fixedly connected, and
Second axle can rotate and second flow distribution plate is rotated under the drive of rotation in the second axle, and second axle is separating
Place at the top of plate, and with realized at the top of demarcation strip it is seamless be in rolling contact, and one end of second axle is carried on tower body inwall, separately
One end is connected through tower body with pivoting controller.
18. according to the method described in claim 1, it is characterised in that：The operating condition of demarcation strip rectifying column is as follows：Demarcation strip essence
Tower is evaporated provided with 10~60 pieces of theoretical plates, and tower top section sets 6~10 pieces of theoretical plates, bottom of towe section to set 15~20 pieces of theoretical plates, charging
Section sets 16~22 pieces of theoretical plates, and middle sideline product extraction section sets 16~22 pieces of theoretical plates, the rate of gasification of charging for 20%~
50%, operating pressure is 0.1Mpa~0.3Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135818.9A CN106147821B (en) | 2015-03-27 | 2015-03-27 | A kind of naphtha extracts preprocessing method of raw materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135818.9A CN106147821B (en) | 2015-03-27 | 2015-03-27 | A kind of naphtha extracts preprocessing method of raw materials |
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| Publication Number | Publication Date |
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| CN106147821A CN106147821A (en) | 2016-11-23 |
| CN106147821B true CN106147821B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510135818.9A Active CN106147821B (en) | 2015-03-27 | 2015-03-27 | A kind of naphtha extracts preprocessing method of raw materials |
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| CN111362773A (en) * | 2020-04-24 | 2020-07-03 | 河北新启元能源技术开发股份有限公司 | Equipment and process for preparing pentane foaming agent by reforming topped naphtha |
| CN115725336A (en) * | 2021-08-30 | 2023-03-03 | 中国石油化工股份有限公司 | System and method for improving yield of triene triphenyl in ethylene device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7267746B1 (en) * | 2001-02-26 | 2007-09-11 | Uop Llc | Dividing wall distillation column control apparatus |
| CN102872609A (en) * | 2011-07-11 | 2013-01-16 | 中国石油化工股份有限公司 | Dividing wall rectifying tower |
-
2015
- 2015-03-27 CN CN201510135818.9A patent/CN106147821B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7267746B1 (en) * | 2001-02-26 | 2007-09-11 | Uop Llc | Dividing wall distillation column control apparatus |
| CN102872609A (en) * | 2011-07-11 | 2013-01-16 | 中国石油化工股份有限公司 | Dividing wall rectifying tower |
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| Publication number | Publication date |
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| CN106147821A (en) | 2016-11-23 |
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