CN209307255U - C5 non-aromatics purification system in crude benzole hydrogenation process for refining - Google Patents
C5 non-aromatics purification system in crude benzole hydrogenation process for refining Download PDFInfo
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- CN209307255U CN209307255U CN201822082247.9U CN201822082247U CN209307255U CN 209307255 U CN209307255 U CN 209307255U CN 201822082247 U CN201822082247 U CN 201822082247U CN 209307255 U CN209307255 U CN 209307255U
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Abstract
The utility model relates to C5 non-aromatics purification system in a kind of crude benzole hydrogenation process for refining, it is vented side in the middle part of stabilizer and sets feed(raw material)inlet, bottom sets liquid-phase product outlet, and top sets gas vent；Gas vent connects the gas-liquid mixture entrance at the top of backflash by primary condenser, and the liquid-phase outlet for the trench bottom that flows back is connected the phegma entrance on exhaust stabilizer top by return line, sets reflux pump and valve on return line；Gaseous phase outlet at the top of backflash connects the entry to mixed solution on the top of gas-liquid separator by after-condenser, and the bottom of gas-liquid separator sets liquid-phase product outlet, and top, which is set, catches mist layer and gaseous phase outlet.The utility model, in conjunction with gas-liquid separating method, realizes the purpose for separating C5 non-aromatics from hydrogenated oil by being vented the tower top operation temperature of stabilizer and the outlet temperature of primary condenser under control steady state operation.
Description
Technical field
The utility model relates to C5 in crude benzole hydrogenation technical field of refinement more particularly to a kind of crude benzole hydrogenation process for refining is non-
Aromatic hydrocarbon product (main component is pentamethylene) purification system.
Background technique
In industrial crude benzene refining technique, due to contain in crude benzol raw material a certain amount of alkene and some trace impurities such as sulphur,
Nitrogen etc. (PPm grades of contents), is difficult to remove by conventional distil-lation method.If alkene does not remove first, in subsequent process
The problems such as being easy to happen polymerization, blocking pipeline and equipment.Therefore, usually crude benzol is handled using crude benzole hydrogenation technique at present
Carry out subsequent processing again afterwards.Crude benzole hydrogenation technique mainly includes two parts:
1) by adding hydrogen means, alkene, alkadienes, sulfur-bearing class compound and nitrogenous class in crude benzol hydrogenation unit: are removed
The impurity such as compound；
2) it distills separative unit: by non-aromatics and aromatic hydrocarbons similar in extractive distillation or extraction and separation boiling point, finally obtaining
Non-aromatics, benzene, toluene and xylene product.
Material passes through after hydrogenation reaction, and double bond, which is hydrogenated, generates alkane or cycloalkane.The impurity such as sulfur-bearing, nitrogen it is organic
Object generates alkane or cycloalkane and hydrogen sulfide, ammonia or carbon dioxide after hydrogenation reaction.Material passes through exhaust stabilizer
After removing hydrogen, hydrogen sulfide, ammonia, carbon dioxide and C1~C4 non-aromatics, remaining hydrocarbon mixture enters distillation separative unit.
In distillation separative unit, remaining non-aromatics in hydrocarbon mixture is separated by way of extraction or extractive distillation with aromatic hydrocarbons component.
Finally, non-aromatic hydrocarbon mixture is sold separately as byproduct.
In recent years, with the gradually promotion of chemical products added value, the further purification of non-aromatics product mix becomes to be cured
Send out important.Prior art transformation both for obtained non-aromatics product mix carries out distillation separation, not only invest it is larger,
Energy consumption is higher, it is also necessary to biggish occupied area, so that some enterprises are difficult to realize expected transformation.
Summary of the invention
The utility model provides C5 non-aromatics purification system in a kind of crude benzole hydrogenation process for refining, passes through control stable state behaviour
Make the lower tower top operation temperature of exhaust stabilizer and the outlet temperature of primary condenser is realized in conjunction with gas-liquid separating method by C5
The purpose that non-aromatics is separated from hydrogenated oil.
In order to achieve the above object, the utility model is implemented with the following technical solutions:
C5 non-aromatics purification system in crude benzole hydrogenation process for refining, including exhaust stabilizer, primary condenser, backflash,
After-condenser and gas-liquid separator；Multilayer column plate is equipped in the exhaust stabilizer, side sets raw material in the middle part of exhaust stabilizer
Entrance, bottom set liquid-phase product outlet, and top sets gas vent；Gas vent is connected at the top of backflash by primary condenser
The liquid-phase outlet of gas-liquid mixture entrance, the trench bottom that flows back is entered by the phegma that return line connects exhaust stabilizer top
Mouthful, reflux pump and valve are set on return line；Gaseous phase outlet at the top of backflash connects gas-liquid separator by after-condenser
Top entry to mixed solution, the bottom of gas-liquid separator set liquid-phase product outlet, top, which is set, catches mist layer and gaseous phase outlet.
Compared with prior art, the utility model has the beneficial effects that
1) extension process as crude benzole hydrogenation technique increases thermic load without additional, and easy to operate；
2) only it need to increase the simple devices such as gas-liquid condenser, gas-liquid separator, small investment, occupied area is small；
3) the non-aromatic hydrocarbon product of C5 can be individually recycled, and refining effect is good, is conducive to increase economic benefit；
4) it is suitable for being transformed the enterprise for having been provided with crude benzole hydrogenation process for refining production capacity, and easy to transform,
It is quick.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of C5 non-aromatics purification system in crude benzole hydrogenation process for refining described in the utility model.
In figure: the exhaust of 1. feed(raw material)inlets 2. 3. column plate of stabilizer, 4. gas vent 5. primary condenser 6. 2 times cold
9. valve of condenser 7. backflash, 8. reflux pump, 10. gas-liquid separator 11. catches mist layer
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
As shown in Figure 1, C5 non-aromatics purification system in crude benzole hydrogenation process for refining described in the utility model, including exhaust are steady
Determine tower 2, primary condenser 5, backflash 7, after-condenser 6 and gas-liquid separator 10；Multilayer is equipped in the exhaust stabilizer 2
Column plate 3, exhaust 2 middle part side of stabilizer set feed(raw material)inlet 1, and bottom sets liquid-phase product outlet, and top sets gas vent 4；Gas
Outlet 4 connects the gas-liquid mixture entrance at 7 top of backflash by primary condenser 5, and the liquid-phase outlet of 7 bottom of backflash passes through
Return line connection is vented the phegma entrance on 2 top of stabilizer, sets reflux pump 8 and valve 9 on return line；Backflash 7 pushes up
The gaseous phase outlet in portion connects the entry to mixed solution on the top of gas-liquid separator 10 by after-condenser 6, gas-liquid separator 10
Bottom sets liquid-phase product outlet, and top, which is set, catches mist layer 11 and gaseous phase outlet.
C5 non-aromatics method of purification is as follows in crude benzole hydrogenation process for refining based on system described in the utility model:
1) hydrogenated oil is entered in exhaust stabilizer 2 by feed(raw material)inlet 1 carries out separating-purifying；Tower top operation temperature be 50~
120 DEG C, operating pressure is 0.3~0.8Mpa (absolute atmosphere), and light component is adopted with gas phase from the gas vent 4 of tower top
Out, liquid-phase product is discharged into extraction cells by tower bottom or extractive distillation unit further separates；
2) gas phase for being vented 2 overhead extraction of stabilizer enters primary condenser 5, is cooled to 45~115 DEG C, the gas-liquid of formation
Mixture one enters backflash 7；
3) in backflash 7, the liquid phase in gas-liquid mixture one returns to exhaust as reflux by reflux pump 8 and valve 9
Stabilizer 2, the gas phase containing C1~C5 non-aromatics and H2S, NH3, CO2 ingredient enter after-condenser 6 and further condense；
4) condensation temperature is 40~110 DEG C in after-condenser 6, C5 non-aromatics is condensed into liquid, the gas-liquid of formation is mixed
It closes object two and enters gas-liquid separator 10；
5) in gas-liquid separator 10, the gas phase containing the non-aromatic hydrocarbon product of C1~C4 and H2S, NH3, CO2 is divided from gas-liquid
From escaping at the top of device 10, with liquid form, from 10 bottom of gas-liquid separator, discharge becomes final products to C5 non-aromatics.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (1)
1. C5 non-aromatics purification system in crude benzole hydrogenation process for refining, which is characterized in that including exhaust stabilizer, primary condensation
Device, backflash, after-condenser and gas-liquid separator；Multilayer column plate, exhaust stabilizer middle part are equipped in the exhaust stabilizer
Side sets feed(raw material)inlet, and bottom sets liquid-phase product outlet, and top sets gas vent；Gas vent is connected back to by primary condenser
The liquid-phase outlet of gas-liquid mixture entrance at the top of chute, the trench bottom that flows back connects exhaust stabilizer top by return line
Phegma entrance sets reflux pump and valve on return line；Gaseous phase outlet at the top of backflash connects gas by after-condenser
The entry to mixed solution on the top of liquid/gas separator, the bottom of gas-liquid separator set liquid-phase product outlet, and top, which is set, catches mist layer and gas phase
Outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822082247.9U CN209307255U (en) | 2018-12-12 | 2018-12-12 | C5 non-aromatics purification system in crude benzole hydrogenation process for refining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822082247.9U CN209307255U (en) | 2018-12-12 | 2018-12-12 | C5 non-aromatics purification system in crude benzole hydrogenation process for refining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209307255U true CN209307255U (en) | 2019-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822082247.9U Active CN209307255U (en) | 2018-12-12 | 2018-12-12 | C5 non-aromatics purification system in crude benzole hydrogenation process for refining |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209307255U (en) |
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2018
- 2018-12-12 CN CN201822082247.9U patent/CN209307255U/en active Active
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