CN108635889A - A kind of light benzene evaporating column in benzene hydrogenation system and its working method - Google Patents
A kind of light benzene evaporating column in benzene hydrogenation system and its working method Download PDFInfo
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- CN108635889A CN108635889A CN201810732081.2A CN201810732081A CN108635889A CN 108635889 A CN108635889 A CN 108635889A CN 201810732081 A CN201810732081 A CN 201810732081A CN 108635889 A CN108635889 A CN 108635889A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/0011—Heating features
- B01D1/0041—Use of fluids
- B01D1/0047—Use of fluids in a closed circuit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/30—Accessories for evaporators ; Constructional details thereof
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/148—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound
- C07C7/163—Purification; Separation; Use of additives by treatment giving rise to a chemical modification of at least one compound by hydrogenation
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Abstract
The present invention relates to the light benzene evaporating column and its working method in a kind of benzene hydrogenation system, the light benzene evaporating column includes tower body, and tower body is divided into the aerosol segregation section on top and the evaporator section of lower part by partition board；Light benzene gas vent is set at the top of tower body, the bottom of tower body sets bottom liquid extraction device；Aerosol segregation section is equipped with central tube and helical duct；Bottom liquid produces device and uses internal and external casing structure, tower bottoms centre is wherein extended upwardly at the top of inner tube, the bottom of inner tube sets light benzene liquid outlet；The top of outer tube is connected to tower body bottom, and the lower part of outer tube sets the outlet of light benzene Residual oil；Horizontal baffle is equipped on the outside of the inner tube extended segment of tower body bottom.The tower body of light benzene evaporating column is divided into the aerosol segregation section on top and the evaporator section of lower part by the present invention, and reboiler is effectively avoided to block or reduce the frequency that reboiler blocks；Being kept completely separate for gas and droplet is realized using cyclonic separation principle in aerosol segregation section.
Description
Technical field
The present invention relates in crude benzole hydrogenation technical field of refinement more particularly to a kind of benzene hydrogenation system light benzene evaporating column and
Its working method.
Background technology
The crude benzol main component generated in coking is benzene, toluene and dimethylbenzene, additionally not containing 5%~10%
Saturated compounds is cyclic hydrocarbon and linear alkene that some carry one or two double bond, is easy to happen polymerisation, and certain
The boiling point of a little unsaturated compounds, sulfide and nitrogenous compound is close with the boiling temperature between corresponding benzene-type products, no
It can be separated them with the method for rectifying.The effect of hydrofining technology is to utilize the various impurity in crude benzol based on thiophene
Method of hydrotreating all removes, and wherein sulfide is completely converted into H2S, nitride converted is NH3, oxide is converted into H2O, insatiable hunger
It is saturated with hydrocarbon plus hydrogen, is separated off H2S、NH3And H2Remaining hydrogenated oil is easy to produce by way of extracting rectifying after O
Go out high-quality benzene, toluene and dimethylbenzene.
The pollution of crude benzole hydrogenation process for refining is small, and product quality can match in excellence or beauty petrobenzene, so, coking industry crude benzol at present
Process for refining substantially with crude benzole hydrogenation it is refined based on.And crude benzole hydrogenation is refined and is divided into as first liquid phase, rear gas phase hydrogenation and two
Section two kinds of basic modes of gas phase hydrogenation, and mainly based on gas phase hydrogenation.
Before carrying out gas phase hydrogenation, gasification process is mainly made of following two steps crude benzol, and the first step is the de- weight of crude benzol,
High boiling fraction in crude benzol is removed by the method for distillation, obtains liquid light benzene；Second step is light benzene gasification, such as attached drawing
Shown in 1, circulating hydrogen high speed forms negative pressure by preevaporator jet mixer 4, makes external light benzene liquid in preevaporator 1
Interior high-speed circulating flowing, using the heat of the light benzene gas after hydrogenation reaction, preheats external light benzene liquid by preevaporator 1
With most of gasification, light benzene gas-liquid mixture is formed, is used as by the formation of light benzene evaporating column jet mixer 5 negative pressure at a high speed dynamic
Power so that 3 bottom of tower of light benzene evaporating column forms a closed cycle with reboiler 2, utilizes the heat of the light benzene gas after hydrogenation reaction
Amount, by the heat supply of reboiler 2, all gasification is (real by holding bottom of tower level balance in light benzene evaporating column 3 for remaining light benzene
It is existing).The core equipment of this light benzene gasification process is light benzene evaporating column 3.
Conventional light benzene evaporating column 3 belongs to void tower, and only there are one mist eliminators on tower body top, and this light benzene evaporating column is in reality
There are two main problems present in operation：It is that the reboiler 2 of light benzene evaporating column 3 frequently occurs to block that (3 months just stifled first
Plug is primary), cause whole equipment to stop production when serious, and be not easily cleaned, larger economic loss is caused to enterprise；Cause this
The reason of kind phenomenon is, due to the presence of unsaturated compound, polymerisation to have occurred during heating and gasifying, is generated certain
The polymer of amount, most polymer build are suspended in evaporating column bottom of tower in the liquid of bottom of tower, and with liquid circulation
When block reboiler 2；Currently, in order to reduce the frequency of reboiler blocking, can only take a large amount of in the extraction of light benzene evaporating column bottom of tower
Method of the bottom of tower light benzene raffinate to reduce bottom of tower polymer concentration.Second Problem is that the mist eliminator of tower top does not have the work for catching mist
With, since gas flow rate is too fast, have a large amount of droplets by high speed by light benzene gas be carried in subsequent pre-reactor, adhere to
On the surface of catalyst, the efficiency of pre-reactor is reduced.
Invention content
The present invention provides the light benzene evaporating columns and its working method in a kind of benzene hydrogenation system, and tower body is divided into top
Aerosol segregation section and lower part evaporator section, effectively avoid reboiler from blocking or reduce the frequency that blocks of reboiler；In gas
Mist segregation section realizes being kept completely separate for gas and droplet using cyclonic separation principle.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of light benzene evaporating column in benzene hydrogenation system, including tower body, the tower body are divided into the aerosol on top by partition board
The evaporator section of segregation section and lower part；Light benzene gas vent is set at the top of tower body, the bottom of tower body sets bottom liquid extraction device；Gas
Mist segregation section is equipped with central tube and helical duct, and central tube is suspended in by horizontal supporting plate in the middle part of tower body, central tube
Top stretch into top tower body space across horizontal supporting plate, i.e., the tower body in tower body space and lower section above horizontal supporting plate is empty
Between be connected to by central tube；Helical duct is set in the annular space that tower body below horizontal supporting plate is formed with central tube；
Light benzene discharge channel is set close to the aerosol segregation section tower body side of partition board, light benzene separation is set in the evaporator section bottom tower body of homonymy
Liquid entrance, light benzene separating liquid entrance connect light benzene discharge channel by light benzene separating liquid pipeline；Close to the evaporator section tower of partition board
The body other side sets gasification light benzene gas vent, and light benzene gas access, light benzene gas are set on the homonymy tower body below horizontal supporting plate
Entrance connects gasification light benzene gas vent by light benzene gas pipeline；The tower body middle part side of evaporator section is less than tower bottoms liquid level
The position of height sets light benzene gas-liquid mixture entrance, and light benzene gas mixture inlet and tower body are tangentially connected；Bottom liquid produces
Device uses internal and external casing structure, tower bottoms centre is wherein extended upwardly at the top of inner tube, the bottom of inner tube sets light benzene
Liquid outlet；The top of outer tube is connected to tower body bottom, and the lower part of outer tube sets the outlet of light benzene Residual oil；Inner tube close to tower body bottom
Horizontal baffle is equipped on the outside of extended segment.
The light benzene gas access of the light benzene gas vent connection plus hydrogen pre-reactor.
The blending agent outlet of the light benzene gas-liquid mixture entrance connection light benzene evaporating column jet mixer, light benzene evaporation
One blending agent entrance of tower jet mixer by reboiler connect light benzene liquid outlet, another blending agent entrance with
The light benzene liquid outlet of preevaporator connects；Preevaporator sets light benzene liquid inlet, circulating hydrogen entrance and circulating hydrogen outlet,
Circulating hydrogen entrance is exported with circulating hydrogen and is connected by circulating hydrogen pipeline, and it is mixed that preevaporator injection is set on circulating hydrogen pipeline
Clutch；Light benzene gas pipeline after the heat transferring medium entrance connection hydrogenation reaction of reboiler, the heat transferring medium outlet of reboiler connect
Connect the heat transferring medium entrance of preevaporator, the light benzene gas-liquid mixed property management after the heat transferring medium outlet connection of preevaporator plus hydrogen
Road.
Tower body above the horizontal supporting plate uses separate structure, passes through flanged joint.
Tubaeform draining hole is set at the top of said inner tube；The area of horizontal baffle is not less than corresponding position tower body sectional area
2/3。
The working method of the light benzene evaporating column, includes the following steps：
1) circulating hydrogen high speed forms negative pressure by preevaporator jet mixer, and liquid light benzene is obtained after making the de- weight of crude benzol
High-speed circulating flows in preevaporator, and carries out heat exchange heating with the light benzene gas after hydrogenation reaction, and liquid light benzene is preheated
And largely gasify, form light benzene gas-liquid mixture；
2) negative pressure is formed as power by light benzene evaporating column jet mixer using light benzene gas-liquid mixture high speed, makes light benzene
Evaporating column bottom of tower forms a closed cycle with reboiler, by the light benzene gas converting heat after reboiler and hydrogenation reaction, by again
Boiling device heat supply all gasifies remaining liquid light benzene in light benzene evaporating column, should keep the liquid level of tower bottoms not in the process
Become；
3) in the evaporator section of tower body lower part by light benzene gas evaporation, the light benzene gas after evaporation is by gasification light benzene gas vent
It draws, the aerosol segregation section on tower body top is entered through light benzene gas access, then along helical duct downlink；It realizes in the process
Gas-liquid separation, a large amount of droplets carried secretly in the light benzene gas after evaporation are attached to by the effect of centrifugal force in tower wall, and along spiral shell
Rotation channel is pooled under dead weight and airflow function above partition board, is drawn by light benzene discharge channel, through light benzene separating liquid entrance
Into the evaporator section of tower body lower part, light benzene gas that gas-liquid separation goes out 180 degree of turning back is flowed up along central tube road, finally by
Light benzene gas vent, which is sent in subsequent plus hydrogen pre-reactor, carries out hydrogenation reaction；
4) in evaporator section, light benzene gas-liquid mixture entrance uses tangential admission mode, simultaneously because it is located at tower bottoms liquid
The lower section in face can make tower bottoms keep high speed rotation state, and the polymer being suspended in tower bottoms is made to assemble in tower wall；And connect
It connects and extends directly into tower bottoms centre at the top of the inner tube of light benzene liquid outlet, to ensure the light benzene liquid polymers of extraction
Content it is minimum, the generation of reboiler clogging can be avoided or reduced；The outlet of light benzene Residual oil directly connects with outer tube, passes through
Outer tube minimum point in tower continuously produces to small flow the light benzene Residual oil containing high concentration polymer, the horizontal baffle being arranged in inner tube
Play baffle, can ensure only to produce peripheral suspension polymer by the outlet of light benzene Residual oil, without gathering tower bottoms center
Close the poor light benzene liquid extraction of object.
Compared with prior art, the beneficial effects of the invention are as follows：
1) tower body is divided into the aerosol segregation section on top and the evaporator section of lower part, in evaporator section, by light benzene evaporating column tower
The state of bottom liquid is changed to rotational flow state by static state, so that the polymer to float on a liquid is assembled in tower wall surrounding, and edge
Tower wall is pooled to bottom of tower, and the outer effective continuous small flow mode that device is produced by bottom liquid produces, and goes to reboiler
Light benzene liquid is produced the considerably less bottom liquid center extraction of the content of inner tube from the polymer of device by bottom liquid, to
Reboiler is effectively avoided to block or reduce the frequency that reboiler blocks；
2) being kept completely separate for gas and droplet is realized using cyclonic separation principle in aerosol segregation section.
Description of the drawings
Fig. 1 is the structural schematic diagram of conventional light benzene evaporating column.
Fig. 2 is the structural schematic diagram of light benzene evaporating column of the present invention.
Fig. 3 is light benzene gas-liquid mixture entrance of the present invention and tower body connection diagram.
In figure：1. 4. preevaporator jet mixer of the conventional light benzene evaporating column of 2. reboiler of preevaporator 3., 5. light benzene
10. helical duct of evaporating column jet mixer 6. mist eliminator, 7. tower body, 8. partition board, 9. central tube, 11. tower bottoms 12.
13. flange of horizontal baffle, 14. horizontal supporting plate
A1. light benzene gas-liquid mixture entrance A2. light benzenes gas access A3. light benzenes separating liquid entrance B1. light benzene gases go out
Mouth B2. light benzene liquid outlet B3. light benzene Residual oils outlet B4. gasification light benzene gas vent B5. light benzene discharge channels
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
As shown in Fig. 2, the light benzene evaporating column in a kind of benzene hydrogenation system of the present invention, including tower body 7, the tower body 7
The aerosol segregation section on top and the evaporator section of lower part are divided by partition board 8；The top of tower body 7 sets light benzene gas vent B1, tower body 7
Bottom set bottom liquid extraction device；Aerosol segregation section is equipped with central tube 9 and helical duct 10, and central tube 9 passes through water
Flat support plate 14 is suspended in 7 middle part of tower body, and top tower body space is stretched into the top of central tube 9 across horizontal supporting plate 14, i.e.,
The tower body space of 14 top of horizontal supporting plate is connected to the tower body space of lower section by central tube 9；14 lower section of horizontal supporting plate
The annular space that is formed of tower body 7 and central tube 9 in set helical duct 10；Close to the aerosol segregation section tower body side of partition board 8
If light benzene discharge channel B5, light benzene separating liquid entrance A3, light benzene separating liquid entrance A3 are set in the evaporator section bottom tower body of homonymy
Light benzene discharge channel b5 is connected by light benzene separating liquid pipeline；Gasification light benzene is set close to the evaporator section tower body other side of partition board 8
Gas vent B4 sets light benzene gas access A2 on the homonymy tower body 7 of the lower section of horizontal supporting plate 14, and light benzene gas access A2 passes through light
Benzene gas pipeline connection gasification light benzene gas vent B4；The 7 middle part side of tower body of evaporator section, less than 11 liquid level of tower bottoms
It is tangentially connected (as shown in Figure 3) with tower body 7 that position sets light benzene gas-liquid mixture entrance A1, light benzene gas mixture inlet A1；Tower
Bottom liquid extraction device uses internal and external casing structure, and 11 centre of tower bottoms, inner tube are wherein extended upwardly at the top of inner tube
Bottom set light benzene liquid outlet B2；The top of outer tube is connected to 7 bottom of tower body, and the lower part of outer tube sets the outlets light benzene Residual oil B3；
Horizontal baffle 12 is equipped on the outside of the inner tube extended segment of 7 bottom of tower body.
The light benzene gas access of the light benzene gas vent B1 connections plus hydrogen pre-reactor.
The blending agent of the light benzene gas-liquid mixture entrance A1 connection light benzene evaporating columns jet mixer 5 exports, light benzene
One blending agent entrance of evaporating column jet mixer 5 connects light benzene liquid outlet B2 by reboiler 2, another mixing is situated between
Matter entrance is connect with the light benzene liquid outlet of preevaporator 1；Preevaporator 1 sets light benzene liquid inlet, circulating hydrogen entrance and follows
Ring hydrogen outlet, circulating hydrogen entrance and circulating hydrogen are exported to be connected by circulating hydrogen pipeline, is set on circulating hydrogen pipeline pre-
Evaporator jet mixer 4；Light benzene gas pipeline after the heat transferring medium entrance connection hydrogenation reaction of reboiler 2, reboiler 2
The heat transferring medium entrance of heat transferring medium outlet connection preevaporator 1 is light after the heat transferring medium outlet connection of preevaporator 1 plus hydrogen
Benzene gas-liquid mixed conduit.
The tower body 7 of 14 top of the horizontal supporting plate uses separate structure, is connected by flange 13.
Tubaeform draining hole is set at the top of said inner tube；The area of horizontal baffle 12 is not less than 7 section of corresponding position tower body
Long-pending 2/3.
The working method of the light benzene evaporating column, includes the following steps：
1) circulating hydrogen high speed forms negative pressure by preevaporator jet mixer 4, and it is light to obtain liquid after so that crude benzol is taken off weight
Benzene high-speed circulating in preevaporator 1 flows, and carries out heat exchange heating with the light benzene gas after hydrogenation reaction, and liquid light benzene is pre-
Heat simultaneously largely gasifies, and forms light benzene gas-liquid mixture；
2) negative pressure is formed as power by light benzene evaporating column jet mixer 5 using light benzene gas-liquid mixture high speed, made light
Benzene evaporating column bottom of tower and reboiler 2 form a closed cycle, by the light benzene gas converting heat after reboiler 2 and hydrogenation reaction,
Remaining liquid light benzene is all gasified in light benzene evaporating column by 2 heat supply of reboiler, the liquid of tower bottoms 11 should be kept in the process
Face height is constant；
3) in the evaporator section of 7 lower part of tower body by light benzene gas evaporation, the light benzene gas after evaporation is gone out by gasification light benzene gas
Mouth B4 is drawn, and the aerosol segregation section on 7 top of tower body is entered through light benzene gas access A2, then along 10 downlink of helical duct；Herein
Gas-liquid separation is realized in the process, and a large amount of droplets carried secretly in the light benzene gas after evaporation are attached to tower wall by the effect of centrifugal force
On, and be pooled to above partition board 8 under dead weight and airflow function along helical duct 10, it is drawn by light benzene discharge channel B5, warp
Light benzene separating liquid entrance A3 enters the evaporator section of 7 lower part of tower body, and the light benzene gas that gas-liquid separation goes out turns back 180 degree along central tube
9 flow up, and are finally sent in subsequent plus hydrogen pre-reactor by light benzene gas vent B1 and carry out hydrogenation reaction；
4) in evaporator section, light benzene gas-liquid mixture entrance A1 uses tangential admission mode, simultaneously because it is located at tower bottoms
The lower section of 11 liquid levels can make tower bottoms 11 keep high speed rotation state, make the polymer being suspended in tower bottoms 11 in tower wall
Aggregation；And the inner tube top for connecting light benzene liquid outlet B2 extends directly into 11 centre of tower bottoms, to ensure extraction
The content of light benzene liquid polymers is minimum, can avoid or reduce the generation of 2 clogging of reboiler；It is straight that light benzene Residual oil exports B3
It connects and connects with outer tube, minimum point continuously produces to small flow the light benzene Residual oil containing high concentration polymer in tower by outer tube, interior
The horizontal baffle 14 being arranged on pipe plays baffle, can ensure that exporting B3 by light benzene Residual oil only produces peripheral suspension polymerisation
Object, without producing the poor light benzene liquid of tower bottoms centre polymer.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. the light benzene evaporating column in a kind of benzene hydrogenation system, which is characterized in that including tower body, on the tower body is divided by partition board
The aerosol segregation section in portion and the evaporator section of lower part；Light benzene gas vent is set at the top of tower body, the bottom of tower body sets bottom liquid and adopts
Go out device；Aerosol segregation section is equipped with central tube and helical duct, and central tube is suspended in by horizontal supporting plate in the middle part of tower body,
Top tower body space, i.e., the tower body space above horizontal supporting plate and lower section are stretched into the top of central tube across horizontal supporting plate
Tower body space be connected to by central tube；Spiral shell is set in the annular space that tower body below horizontal supporting plate is formed with central tube
Revolve channel；Light benzene discharge channel is set close to the aerosol segregation section tower body side of partition board, is set in the evaporator section bottom tower body of homonymy
Light benzene separating liquid entrance, light benzene separating liquid entrance connect light benzene discharge channel by light benzene separating liquid pipeline；Close to partition board
The evaporator section tower body other side sets gasification light benzene gas vent, and light benzene gas access is set on the homonymy tower body below horizontal supporting plate,
Light benzene gas access connects gasification light benzene gas vent by light benzene gas pipeline；The tower body middle part side of evaporator section is less than tower
The position of kettle liquid liquid level sets light benzene gas-liquid mixture entrance, and light benzene gas mixture inlet and tower body are tangentially connected；Bottom of tower
Liquid produces device and uses internal and external casing structure, and tower bottoms centre, the bottom of inner tube are wherein extended upwardly at the top of inner tube
Portion sets light benzene liquid outlet；The top of outer tube is connected to tower body bottom, and the lower part of outer tube sets the outlet of light benzene Residual oil；Close to tower body bottom
Horizontal baffle is equipped on the outside of the inner tube extended segment in portion.
2. the light benzene evaporating column in a kind of benzene hydrogenation system according to claim 1, which is characterized in that the light benzene gas
The light benzene gas access of outlet connection plus hydrogen pre-reactor.
3. the light benzene evaporating column in a kind of benzene hydrogenation system according to claim 1, which is characterized in that the light benzene gas-liquid
Mixture inlet connects the blending agent outlet of light benzene evaporating column jet mixer, and one of light benzene evaporating column jet mixer is mixed
It closes medium inlet and light benzene liquid outlet, the light benzene liquid discharge of another blending agent entrance and preevaporator is connected by reboiler
Mouth connection；Preevaporator sets light benzene liquid inlet, circulating hydrogen entrance and circulating hydrogen outlet, circulating hydrogen entrance and recycle hydrogen
Gas outlet is connected by circulating hydrogen pipeline, and preevaporator jet mixer is set on circulating hydrogen pipeline；The heat exchange of reboiler is situated between
Matter entrance connects the light benzene gas pipeline after hydrogenation reaction, the heat transferring medium of the heat transferring medium outlet connection preevaporator of reboiler
Entrance, the light benzene gas-liquid mixed conduit after the heat transferring medium outlet connection of preevaporator plus hydrogen.
4. the light benzene evaporating column in a kind of benzene hydrogenation system according to claim 1, which is characterized in that described horizontally-supported
Tower body above plate uses separate structure, passes through flanged joint.
5. the light benzene evaporating column in a kind of benzene hydrogenation system according to claim 1, which is characterized in that the top of said inner tube
Portion sets tubaeform draining hole；The area of horizontal baffle is not less than the 2/3 of corresponding position tower body sectional area.
6. the working method of light benzene evaporating column as described in claim 1, which is characterized in that include the following steps：
1) circulating hydrogen high speed forms negative pressure by preevaporator jet mixer, and liquid light benzene is obtained pre- after making the de- weight of crude benzol
High-speed circulating flows in evaporator, and carries out heat exchange heating with the light benzene gas after hydrogenation reaction, and liquid light benzene is preheated and big
Partial gasification forms light benzene gas-liquid mixture；
2) negative pressure is formed as power by light benzene evaporating column jet mixer using light benzene gas-liquid mixture high speed, light benzene is made to evaporate
Tower bottom of tower forms a closed cycle with reboiler, by the light benzene gas converting heat after reboiler and hydrogenation reaction, by reboiler
Heat supply all gasifies remaining liquid light benzene in light benzene evaporating column, the liquid level of tower bottoms should be kept constant in the process；
3) in the evaporator section of tower body lower part by light benzene gas evaporation, the light benzene gas after evaporation is drawn by gasification light benzene gas vent
Go out, the aerosol segregation section on tower body top is entered through light benzene gas access, then along helical duct downlink；Gas is realized in the process
Liquid detaches, and a large amount of droplets carried secretly in the light benzene gas after evaporation are attached to by the effect of centrifugal force in tower wall, and along spiral
Channel is pooled under dead weight and airflow function above partition board, is drawn by light benzene discharge channel, through light benzene separating liquid entrance into
Enter the evaporator section of tower body lower part, the light benzene gas that gas-liquid separation goes out 180 degree of turning back is flowed up along central tube road, finally by light
Benzene gas outlet, which is sent in subsequent plus hydrogen pre-reactor, carries out hydrogenation reaction；
4) in evaporator section, light benzene gas-liquid mixture entrance uses tangential admission mode, simultaneously because it is located at tower bottoms liquid level
Lower section can make tower bottoms keep high speed rotation state, and the polymer being suspended in tower bottoms is made to assemble in tower wall；And it connects light
Tower bottoms centre is extended directly at the top of the inner tube of benzene liquid outlet, to ensure containing for the light benzene liquid polymers produced
Amount is minimum, can avoid or reduce the generation of reboiler clogging；The outlet of light benzene Residual oil directly connects with outer tube, passes through outer tube
Minimum point continuously produces to small flow the light benzene Residual oil containing high concentration polymer in tower, and the horizontal baffle being arranged in inner tube plays gear
Stream acts on, and can ensure only to produce a peripheral suspension polymer by the outlet of light benzene Residual oil, without by tower bottoms centre polymer
Poor light benzene liquid extraction.
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| CN201810732081.2A CN108635889B (en) | 2018-07-05 | 2018-07-05 | Light benzene evaporation tower in benzene hydrogenation system and working method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111939584A (en) * | 2020-09-04 | 2020-11-17 | 中冶焦耐(大连)工程技术有限公司 | Process and system for evaporating crude benzene in benzene hydrogenation reaction system |
| CN114713000A (en) * | 2022-04-21 | 2022-07-08 | 中冶焦耐(大连)工程技术有限公司 | Exhaust cleaning tower, asphalt smoke tail gas incineration system and process |
| CN116899249A (en) * | 2023-09-13 | 2023-10-20 | 山西诚宏福得一化工有限公司 | Light benzene separation processing device and processing technology thereof |
| WO2024112714A1 (en) * | 2022-11-22 | 2024-05-30 | Cameron International Corporation | Direct contact vaporizer |
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