CN110511784A - It is hydrocracked fractionating column tail oil heat utilization system and method - Google Patents
It is hydrocracked fractionating column tail oil heat utilization system and method Download PDFInfo
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- CN110511784A CN110511784A CN201910823673.XA CN201910823673A CN110511784A CN 110511784 A CN110511784 A CN 110511784A CN 201910823673 A CN201910823673 A CN 201910823673A CN 110511784 A CN110511784 A CN 110511784A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G67/00—Treatment of hydrocarbon oils by at least one hydrotreatment process and at least one process for refining in the absence of hydrogen only
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention provides one kind to be hydrocracked fractionating column tail oil heat utilization system and method, the system comprises charging liquid separation tanks, furnace charge heat exchanger, heating furnace and fractionating column, the liquid phase discharge port of the charging liquid separation tank is connected after the first passage of the furnace charge heat exchanger with the feed inlet of the heating furnace, the discharge port of the heating furnace is connected with the liquid phase feeding mouth of the fractionating column, the tail oil outlet of the fractionating column is connected with the second channel entrance of the furnace charge heat exchanger, the heat exchange at the furnace charge heat exchanger so that the liquid phase of the tail oil of the fractionating column and the charging liquid separation tank discharges.The present invention provides the schemes that a kind of pair of fractionating column tail oil heat is efficiently used, and are exchanged heat using fractionating column tail oil and fractionating column charging, make full use of the heat of fractionating column tail oil, and reduce the furnace fuel gas consumption of charging.
Description
Technical field
The present invention relates to technical field of petrochemical industry, and in particular to hydrocracking technology field, more particularly to a kind of plus hydrogen
Cracking fractionating column tail oil heat utilization system and method.
Background technique
Being hydrocracked is under higher pressure and temperature, and hydrogen makes mink cell focus occur to add hydrogen, cracking through catalyst action
And isomerization reaction, it is light oil the raw material of cracking alkene (gasoline, kerosene, diesel oil or catalytic cracking) by heavy oil conversion
Process.
Hydrocracking unit mainly includes reaction member and fractionation unit two parts, and wherein fractionation unit by stripper and divides
Tower composition is evaporated, fractionating column charging is exchanged heat by stripper bottoms stream to 260~290 DEG C, is fractionated tower charging flash tank gas-liquid point
From gas phase is directly entered fractionating column, and liquid phase feeds the heating laggard fractionating column of stove heating by fractionating column, and fractionating column distinguishes output stone
Cerebrol, kerosene, diesel oil and hydrogenation tail oil, wherein 310~350 DEG C plus to split tail oil coal stripper tower bottom reboiler of first making to navigate hot
Then two-way is divided in source, all the way after steam generator recycles heat, directly to being catalyzed, another way makees recycle oil for heat discharging.
However, hydrogenation tail oil potential temperature is higher, and heat utilization has the following problems in existing process flow: first is that boat
210~240 DEG C of the stream temperature of coal stripper reboiler makees heat source using 310~350 DEG C of hydrogenation tail oil, heat transfer temperature difference compared with
Greatly,It loses larger；Second is that hydrogenation tail oil is navigated, coal stripper reboiler exchanges heat to 290~320 DEG C, is generated by steam generator
Low-pressure steam, hydrogenation tail oil potential temperature is higher, belongs to high-quality low use, and heat utilization is unreasonable.
Summary of the invention
For the problems of the prior art, the purpose of the present invention is to provide one kind to be hydrocracked fractionating column tail oil heat benefit
With system and method, is exchanged heat using fractionating column tail oil and fractionating column charging, make full use of the heat of fractionating column tail oil, and
Reduce the consumption of furnace fuel gas.
The embodiment of the present invention provides one kind and is hydrocracked fractionating column tail oil heat utilization system, and the system comprises chargings point
Flow container, furnace charge heat exchanger, heating furnace and fractionating column, it is described charging liquid separation tank liquid phase discharge port through the heating furnace into
It is connected after expecting the first passage of heat exchanger with the feed inlet of the heating furnace, the discharge port of the heating furnace and the fractionating column
Liquid phase feeding mouth be connected, the second channel entrance phase of the tail oil of the fractionating column outlet and the furnace charge heat exchanger
Connection, so that the liquid phase of the tail oil of the fractionating column and the charging liquid separation tank discharges at the furnace charge heat exchanger
Heat exchange.
Optionally, the fractionating column tail oil export after a three-way control valve with the furnace charge heat exchanger
Second channel entrance is connected.
Optionally, the system also includes boat coal stripper reboiler, the thermal source inlets of the boat coal stripper reboiler
It is connected with the outlet of the second channel of the furnace charge heat exchanger.
Optionally, the system also includes steam generator, the first thermal source outlet of the boat coal stripper reboiler with
The feed inlet of the steam generator is connected, and the discharging of the steam generator is used as catalysis, and the boat coal stripper boils again
The discharging of the Secondary Heat Source outlet of device is used as circulation tail oil.
Optionally, the gas phase discharge port of the charging liquid separation tank is connected with the gas-phase feed mouth of the fractionating column.
Optionally, it is described charging liquid separation tank liquid phase discharge port after a feed pump with the furnace charge heat exchanger
First passage entrance is connected.
Optionally, the tail oil outlet of the fractionating column is logical with the second of the furnace charge heat exchanger after tail oil pump
Road entrance is connected.
The embodiment of the present invention also provides one kind and is hydrocracked fractionating column tail oil heat utilization method, adds hydrogen to split using described
Change fractionating column tail oil heat utilization system, described method includes following steps:
So that fractionating column charging is entered charging liquid separation tank and carry out gas-liquid separation, obtains liquid phase feeding；
So that liquid phase feeding is entered the first passage of the furnace charge heat exchanger, carries out heat with the tail oil in second channel
Exchange；
After the heated stove heating of liquid phase feeding after making heat exchange, into the liquid phase feeding mouth of the fractionating column；
Make the fractionating column tail oil enter the furnace charge heat exchanger second channel, with the first passage
In liquid phase feeding carry out heat exchange.
Optionally, make the tail oil of the fractionating column after a three-way control valve into the of the furnace charge heat exchanger
Two channels, the heat exchange of tail oil and the liquid phase feeding by adjusting fractionating column described in the aperture regulation of the three-way control valve
Amount.
Optionally, the system also includes boat coal stripper reboiler and steam generators；
The method also includes following steps:
Make the tail oil of the fractionating column after the second channel of the furnace charge heat exchanger, into the boat coal
Stripper reboiler is used as heat source；
The tail oil of the fractionating column is set to enter steam generator from the first thermal source outlet of the boat coal stripper reboiler
It is used as catalysis as generation steam, then the discharge port through the steam generator；
The tail oil of the fractionating column is set to be used as circulation tail oil through the Secondary Heat Source outlet of the boat coal stripper reboiler.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can limit the scope of the invention.
It is provided by the present invention to be hydrocracked fractionating column tail oil heat utilization system and method has the advantage that
The present invention provides a kind of schemes utilized to the tail oil heat for being hydrocracked fractionating column, utilize fractionating column tail
Oil exchanges heat with fractionating column charging, makes full use of the heat of fractionating column tail oil, fractionating column charging is before entering heating stove heating
Temperature can be improved 5~20 DEG C, to reduce the consumption of furnace fuel gas；After fractionating column tail oil and fractionating column charging heat exchange, steam
The heat of generator is reduced, and reduces steam steam production in hydrocracking unit, fractionating column tail oil heat is directly transferred to technique
Medium reduces the consumption of high-grade fuel, improves tail oil heating efficiency, can significantly improve the warp of hydrocracking unit
Ji benefit.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon.
Fig. 1 is the structural schematic diagram for being hydrocracked fractionating column tail oil heat utilization system of one embodiment of the invention；
Fig. 2 is the flow chart for being hydrocracked fractionating column tail oil heat utilization method of one embodiment of the invention.
Appended drawing reference:
1 charging liquid separation tank
2 feed pumps
3 furnace charge heat exchangers
4 heating furnaces
5 fractionating columns
6 tail oils pump
7 boat coal stripper reboilers
8 steam generators
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to example set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will more
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, knot
Structure or characteristic can be incorporated in any suitable manner in one or more embodiments.
In addition, attached drawing is only the schematic illustrations of the disclosure, it is not necessarily drawn to scale.Identical attached drawing mark in figure
Note indicates same or similar part, thus will omit repetition thereof.
As shown in Figure 1, in order to solve the above-mentioned technical problem, the embodiment of the present invention provides one kind and is hydrocracked fractionating column tail oil
Heat utilization system, the system comprises charging liquid separation tank 1, furnace charge heat exchanger 3, heating furnace 4 and fractionating column 5, chargings
Liquid separation tank 1 be used for along Fig. 1 the path S1 input fractionating column charging carry out gas-liquid separation, obtain gas-phase feed and liquid phase into
Material, wherein the gas-phase feed is directly entered the gas-phase feed mouth of fractionating column 5, the liquid phase feeding successively passes through the heating furnace
After feed exchanger 3 and the heating furnace 4, into the liquid phase feeding mouth of the fractionating column 5, the fractionating column 5 divides half output
Naphtha, kerosene, diesel oil and hydrogenation tail oil.Since the temperature of hydrogenation tail oil is relatively high, generally at 310~350 DEG C, by fractionating column
5 tail oil also enters into furnace charge heat exchanger 3, carries out heat exchange with the liquid phase feeding before heating by heating furnace 4, mentions
The temperature of high liquid phase feeding.
Specifically, the liquid phase discharge port of the charging liquid separation tank 1 and the first passage of the furnace charge heat exchanger 3 enter
Mouth is connected, and the first passage outlet of the furnace charge heat exchanger 3 is connected with the feed inlet of the heating furnace 4, described
The discharge port of heating furnace 4 is connected with the liquid phase feeding mouth of the fractionating column 5, and the tail oil outlet of the fractionating column 5 adds with described
The second channel entrance of hot stove feed exchanger 3 is connected, so that in the second channel of the furnace charge heat exchanger 3
310~350 DEG C of tail oil and first passage in 260~290 DEG C of liquid phases discharging carry out heat exchange, liquid phase feeding using plus
Temperature can be improved 5~20 DEG C before heating by hot stove 4, to reduce the consumption of furnace fuel gas.
In this embodiment, the fractionating column 5 tail oil export after a three-way control valve with the furnace charge
The second channel entrance of heat exchanger 3 is connected, the tail oil and liquid of the adjustable fractionating column 5 of aperture by adjusting three-way control valve
The mutually heat exchange amount between charging, so that device operation is more flexible.
As shown in Figure 1, in this embodiment, the fractionating column tail oil heat utilization system that is hydrocracked further includes boat coal vapour
Stripper reboiler 7, the thermal source inlet of the boat coal stripper reboiler 7 and the second channel of the furnace charge heat exchanger 3
Outlet is connected.The tail oil of the fractionating column 5 is re-used as boat coal vapour after the second channel of the furnace charge heat exchanger 3
The heat source of stripper reboiler 7.Therefore, the tail oil of fractionating column 5 is cooled down by having carried out heat exchange at furnace charge heat exchanger 3,
The heat exchange of tail oil and boat coal stripper reboiler tower base stream when reducing the heat source in tail oil as boat coal stripper reboiler 7
The temperature difference reduces heatDamage, is conducive to heat cascade utilization.
As shown in Figure 1, in this embodiment, the fractionating column tail oil heat utilization system that is hydrocracked further includes steam hair
First thermal source outlet of raw device 8, the boat coal stripper reboiler 7 is connected with the feed inlet of the steam generator 8, described
The tail oil of fractionating column 5 cool down in the steam generator 8 after along Fig. 1 path S2 export to the reaction list of hydrocracking unit
Member is used as catalysis, and the discharging of the Secondary Heat Source outlet of the boat coal stripper reboiler 7 path S3 along Fig. 1 is used as loop tail
Oil.After the tail oil of fractionating column 5 at furnace charge heat exchanger 3 by having carried out heat exchange cooling, tail oil is transported to the heat of catalysis
Amount can also be reduced, and can reduce the steam production of steam generator, reduce the heat generated in hydrocracking unit, and heat is direct
It is transferred to processing medium, reduces the consumption of high-grade fuel.Catalysis refers in the reaction member of hydrocracking unit herein
Catalysis.
In this embodiment, it is described charging liquid separation tank 1 liquid phase discharge port after a feed pump 2 with the furnace charge
The first passage entrance of heat exchanger 3 is connected.The fractionating column 5 tail oil outlet through a tail oil pump 6 after with the heating furnace into
The second channel entrance of material heat exchanger 3 is connected.
As shown in Fig. 2, the embodiment of the present invention, which also provides one kind, is hydrocracked fractionating column tail oil heat utilization method, using institute
That states is hydrocracked fractionating column tail oil heat utilization system, and described method includes following steps:
S100: so that fractionating column charging is entered charging liquid separation tank 1 and carry out gas-liquid separation, obtain liquid phase feeding；
S200: liquid phase feeding is made to enter the first passage of the furnace charge heat exchanger 3, with the tail oil in second channel
Carry out heat exchange；
S300: after the heated furnace 4 of liquid phase feeding after making heat exchange heats, into the liquid phase feeding mouth of the fractionating column 5；
S400: make the fractionating column 5 tail oil enter the furnace charge heat exchanger 3 second channel, with it is described
Liquid phase feeding in first passage carries out heat exchange.
Specifically, in the step s 100, fractionating column charging enter charging liquid separation tank 1 in after, gas-liquid separation obtain liquid phase into
Material and gas-phase feed, gas-phase feed are directly entered the gas-phase feed mouth of fractionating column 5.And liquid phase feeding successively passes through in step S200
Furnace charge heat exchanger 3 and step S300 in heating furnace 4 after enter fractionating column 5 liquid phase feeding mouth.
In this embodiment, make the tail oil of the fractionating column 5 enter the furnace charge after a three-way control valve to change
The second channel of hot device 3, by adjust fractionating column 5 described in the aperture regulation of the three-way control valve tail oil and the liquid phase into
The heat exchange amount of material, so that device operation is more flexible.
In this embodiment, correspond to Fig. 1, the fractionating column tail oil heat utilization system that is hydrocracked further includes boat coal vapour
Stripper reboiler 7 and steam generator 8.The fractionating column tail oil heat utilization method that is hydrocracked further includes following steps:
Make the tail oil of the fractionating column 5 after the second channel of the furnace charge heat exchanger 3, into the boat
Coal stripper reboiler 7 is used as heat source；
The tail oil of the fractionating column 5 is set to enter steam generation from the first thermal source outlet of the boat coal stripper reboiler 7
Device 8, which is used as, occurs steam, then the discharge port through the steam generator 8 is used as catalysis；
The tail oil of the fractionating column 5 is set to be used as circulation tail oil through the Secondary Heat Source outlet of the boat coal stripper reboiler 7.
Therefore, the tail oil of fractionating column 5 is reduced by having carried out heat exchange cooling at furnace charge heat exchanger 3 in tail
The heat transfer temperature difference of tail oil and boat coal stripper reboiler tower base stream, is reduced when the oily heat source as boat coal stripper reboiler 7
HeatDamage, is conducive to heat cascade utilization；Further, the tail oil of fractionating column 5 passes through at furnace charge heat exchanger 3
After having carried out heat exchange cooling, the heat that tail oil is transported to catalysis can also be reduced, and can reduce the steam production of steam generator, be reduced
The heat generated in hydrocracking unit, heat are directly transferred to processing medium, reduce the consumption of high-grade fuel.Herein
Catalysis refers to the catalysis in the reaction member of hydrocracking unit, to improve the economic benefit of hydrocracking unit.
Therefore, the present invention passes through by reducing the combustion of charging heating furnace to the high-grade heat of hydrogenation tail oil is rationally utilized
Expect gas consumption, reduce low-grade steam steam production in device, while reducing the consumption of deaerated water, higher economic effect can be obtained
Benefit.
Further, it is as follows to enumerate embodiment by the present invention.Those skilled in the art are it will be clearly understood that the embodiment is only
Help understands the present invention, should not be regarded as a specific limitation of the invention.
Embodiment 1
By taking 2,600,000 tons/year of hydrocracking units of certain oil plant as an example, by fractionating column feed heating furnace before temperature increase 9 DEG C,
Tail oil to the operating condition that catalysis and circulation ratio are 100:0 is analyzed, and illustrates fractionating column tail oil heat utilization method of the present invention.
The thermic load variation of optimization front and back fractionating column charging heating furnace and steam generator is as shown in table 1 below.
The thermic load variation of 1 embodiment 1 of table optimization front and back fractionating column charging heating furnace and steam generator
| Logistics/tower | Feed heating furnace thermic load, kW | Steam generator thermic load, kW |
| Before transformation | 40335 | 15425 |
| After transformation | 37281 | 12371 |
| Variable quantity | 3054 | 3054 |
| Change rate | 7.6% | 19.8% |
The Efficiency Comparison of optimization front and back hydrocracking unit is as shown in table 2 below.
Benefit after the optimization of 2 embodiment 1 of table
Note: pressing natural gas standard calorific value 4.186MJ/kg, and operating time in year 8400h is calculated.
By upper Tables 1 and 2 it is found that reducing charging heating furnace thermic load 3054kW in embodiment 1, reduces steam and steam load
3054kW, fuel gas saving is calculated as 0.73t/h by 3054kW, and few producing steam 4.7t/h saves deaerated water 4.7t/h, year
1612.1 ten thousand yuan/year of benefit.
Embodiment 2
By taking 2,600,000 tons/year of hydrocracking units of certain oil plant as an example, by fractionating column feed heating furnace before temperature increase 9 DEG C,
Tail oil to the operating condition that catalysis and circulation ratio are 50:50 is analyzed, and is illustrated the present invention plus is split tail oil heat utilization method.
The thermic load variation of optimization front and back fractionating column charging heating furnace and steam generator is as shown in table 3 below.
The thermic load variation of 3 embodiment 2 of table optimization front and back fractionating column charging heating furnace and steam generator
The Efficiency Comparison of optimization front and back hydrocracking unit is as shown in table 4 below.
Benefit after the optimization of 4 embodiment 2 of table
Note: pressing natural gas standard calorific value 4.186MJ/kg, and operating time in year 8400h is calculated.
By upper table 3 and table 4 it is found that reducing charging heating furnace thermic load 3054kW in embodiment 2, reduces steam and steam load
1527kW, fuel gas saving are calculated as 0.36t/h by 1527kW, and few producing steam 2.35t/h saves deaerated water 2.35t/h, year
806.1 ten thousand yuan/year of benefit.
Embodiment 3
By taking 2,600,000 tons/year of hydrocracking units of certain oil plant as an example, by fractionating column feed heating furnace before temperature increase 9 DEG C,
Tail oil to the operating condition that catalysis and circulation ratio are 20%:80% is analyzed, and is illustrated the present invention plus is split tail oil heat utilization method.
The thermic load variation of optimization front and back fractionating column charging heating furnace and steam generator is as shown in table 5 below.
The thermic load variation of 5 embodiment 3 of table optimization front and back fractionating column charging heating furnace and steam generator
| Logistics/tower | Feed heating furnace thermic load, kW | Steam generator thermic load, kW |
| Before transformation | 34767 | 3294 |
| After transformation | 31713 | 2646 |
| Variable quantity | 3054 | 648 |
| Change rate | 8.8 | 19.7 |
The Efficiency Comparison of optimization front and back hydrocracking unit is as shown in table 6 below.
Benefit after the optimization of 6 embodiment 3 of table
Note: pressing natural gas standard calorific value 4.186MJ/kg, and operating time in year 8400h is calculated.
By upper table 5 and table 6 it is found that reducing charging heating furnace thermic load 3054kW in embodiment 3, reduces steam and steam load
648kW, fuel gas saving are calculated as 0.15t/h by 648kW, and few producing steam 1t/h saves deaerated water 1t/h, Nian Xiaoyi
342.1 ten thousand yuan/year.
By Examples 1 to 3 it is found that using technique of the invention, high-grade fuel gas can be saved, is reduced low in device
The steam production of grade steam reduces the consumption of deaerated water simultaneously, by Examples 1 to 3 operation, Nian Xiaoyi increases separately 1612.1,
806.1 and 342.1 ten thousand yuan/year have apparent economic benefit.
In conclusion compared with prior art, the present invention provides it is a kind of to be hydrocracked the tail oil heat of fractionating column into
The scheme that row utilizes is exchanged heat using fractionating column tail oil and fractionating column charging, makes full use of the heat of fractionating column tail oil, is fractionated
Tower charging temperature before entering heating stove heating can be improved 5~20 DEG C, to reduce the consumption of furnace fuel gas；Fractionating column tail oil
After fractionating column charging heat exchange, the heat of steam generator is reduced, and reduces steam steam production in hydrocracking unit, fractionating column
Tail oil heat is directly transferred to processing medium, reduces the consumption of high-grade fuel, improves tail oil heating efficiency, can be bright
The aobvious economic benefit for improving hydrocracking unit.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, In
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (10)
1. one kind is hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the system comprises charging liquid separation tanks
(1), furnace charge heat exchanger (3), heating furnace (4) and fractionating column (5), the liquid phase discharge port warp of charging liquid separation tank (1)
It is connected after the first passage of the furnace charge heat exchanger (3) with the feed inlet of the heating furnace (4), the heating furnace
(4) discharge port is connected with the liquid phase feeding mouth of the fractionating column (5), and the tail oil outlet of the fractionating column (5) adds with described
The second channel entrance of hot stove feed exchanger (3) is connected, so that the tail oil of the fractionating column (5) and the charging liquid separation
Liquid phase discharging heat exchange at the furnace charge heat exchanger (3) of tank (1).
2. according to claim 1 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the fractionating column
(5) tail oil outlet is connected after a three-way control valve with the second channel entrance of the furnace charge heat exchanger (3).
3. according to claim 1 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the system is also
Including navigating coal stripper reboiler (7), the thermal source inlet and the furnace charge of boat coal stripper reboiler (7) exchange heat
The second channel outlet of device (3) is connected.
4. according to claim 3 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the system is also
Including steam generator (8), the first thermal source outlet and the steam generator (8) of boat coal stripper reboiler (7)
Feed inlet is connected, and the discharging of the steam generator (8) is used as catalysis, the second heat of boat coal stripper reboiler (7)
The discharging of source outlet is used as circulation tail oil.
5. according to claim 1 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the charging point
The gas phase discharge port of flow container (1) is connected with the gas-phase feed mouth of the fractionating column (5).
6. according to claim 1 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the charging point
The liquid phase discharge port of flow container (1) is connected after a feed pump (2) with the first passage entrance of the furnace charge heat exchanger (3)
It connects.
7. according to claim 1 be hydrocracked fractionating column tail oil heat utilization system, which is characterized in that the fractionating column
(5) tail oil outlet is connected after a tail oil pumps (6) with the second channel entrance of the furnace charge heat exchanger (3).
8. one kind is hydrocracked fractionating column tail oil heat utilization method, which is characterized in that use any one of claims 1 to 7
Described is hydrocracked fractionating column tail oil heat utilization system, and described method includes following steps:
So that fractionating column charging is entered charging liquid separation tank (1) and carry out gas-liquid separation, obtains liquid phase feeding；
So that liquid phase feeding is entered the first passage of the furnace charge heat exchanger (3), carries out heat with the tail oil in second channel
Exchange；
After the heated furnace of liquid phase feeding (4) heating after making heat exchange, into the liquid phase feeding mouth of the fractionating column (5)；
The tail oil of the fractionating column (5) is set to enter the second channel of the furnace charge heat exchanger (3), to lead to described first
Liquid phase feeding in road carries out heat exchange.
9. according to claim 8 be hydrocracked fractionating column tail oil heat utilization method, which is characterized in that make the fractionation
The tail oil of tower (5) enters the second channel of the furnace charge heat exchanger (3) after a three-way control valve, described in adjusting
The tail oil of fractionating column described in the aperture regulation of three-way control valve (5) and the heat exchange amount of the liquid phase feeding.
10. according to claim 8 be hydrocracked fractionating column tail oil heat utilization method, which is characterized in that the system
It further include boat coal stripper reboiler (7) and steam generator (8)；
The method also includes following steps:
Make the tail oil of the fractionating column (5) after the second channel of the furnace charge heat exchanger (3), into the boat
Coal stripper reboiler (7) is used as heat source；
The tail oil of the fractionating column (5) is set to enter steam generation from the first thermal source outlet of boat coal stripper reboiler (7)
Device (8), which is used as, occurs steam, then the discharge port through the steam generator (8) is used as catalysis；
The tail oil of the fractionating column (5) is set to be used as circulation tail oil through the Secondary Heat Source outlet of boat coal stripper reboiler (7).
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| CN201910823673.XA CN110511784B (en) | 2019-09-02 | 2019-09-02 | Hydrocracking fractionating tower tail oil heat utilization system and method |
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| CN105214329A (en) * | 2015-09-06 | 2016-01-06 | 上海优华系统集成技术股份有限公司 | Distillation system and rectification process |
| CN205603526U (en) * | 2016-05-10 | 2016-09-28 | 洛阳瑞泽石化工程有限公司 | Hydrocracking unit fractionating tower charge -in system |
| CN107541245A (en) * | 2016-06-27 | 2018-01-05 | 中国石化工程建设有限公司 | A kind of hydrocracked product fractionating system and fractional method |
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2019
- 2019-09-02 CN CN201910823673.XA patent/CN110511784B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105214329A (en) * | 2015-09-06 | 2016-01-06 | 上海优华系统集成技术股份有限公司 | Distillation system and rectification process |
| CN205603526U (en) * | 2016-05-10 | 2016-09-28 | 洛阳瑞泽石化工程有限公司 | Hydrocracking unit fractionating tower charge -in system |
| CN107541245A (en) * | 2016-06-27 | 2018-01-05 | 中国石化工程建设有限公司 | A kind of hydrocracked product fractionating system and fractional method |
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