CN103361105A - Simple separation method for separating catalytic cracking gasoline into heavy gasoline and light gasoline - Google Patents
Simple separation method for separating catalytic cracking gasoline into heavy gasoline and light gasoline Download PDFInfo
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- CN103361105A CN103361105A CN2012100975572A CN201210097557A CN103361105A CN 103361105 A CN103361105 A CN 103361105A CN 2012100975572 A CN2012100975572 A CN 2012100975572A CN 201210097557 A CN201210097557 A CN 201210097557A CN 103361105 A CN103361105 A CN 103361105A
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Abstract
The invention relates to a simple separation method for separating catalytic cracking gasoline into heavy gasoline and light gasoline. The simple separation method is characterized in that oil gas on the top of a fractionating tower is distilled off from the top of the fractionating tower, the distilled oil gas is cooled to 50-70 DEG C by an oil-gas air cooler on the top of the fractionating tower and then enters a heavy gasoline-gas separator to be subjected to gas-liquid-water three-phase separation, separated acidic water enters an acidity pump, a part of heavy gasoline returns to the top of the fractionating tower to serve as cold reflux on the top of the fractionating tower and to replace circulating backflow on the top of the fractionating tower, the rest of heavy gasoline enters an absorption tower of an absorption stable part, the oil gas separated out by the heavy gasoline-gas separator is cooled to 40 DEG C by an oil gas condensation cooler on the top of the fractionating tower and then enters a light gasoline-gas separator to be subjected to gas-liquid-water three-phase separation, separated light gasoline returns to a reaction part so as to be refined, separated gas enters a wet gas compressor, and the acidic water enters the absorption stable part. The simple separation method is low in investment, simple in flow path, convenient to operate and low in energy consumption; and when the content of gasoline olefine is higher than 35%, the method can be used for reducing the content of gasoline olefine to be lower than 35%.
Description
Technical field
The present invention relates to the simple and easy separation method that a kind of catalytically cracked gasoline is divided into weight gasoline, more specifically to the improvement of catalytic cracking unit processing method.
Background technology
The GB17930-1999 that the whole nation began to carry out from January 1st, 2003, the GB17930-2006 that on December 6th, 2006 began to carry out, GB17930-2011 to issuing and implementation on May 2nd, 2011, requirement to motor spirit improves constantly, olefin(e) centent calendar year 2001 is not more than 35v% in the motor spirit, the state III that is now implementing requires to be not more than 30v%, and the state IV that on December 31st, 2013 came into effect requires to be not more than 28v%.
Because catalytically cracked gasoline is main in China's oil refining enterprise gasoline production, along with being on the increase of the devices such as hydrocracking, catalytic reforming, etherificate, alkylation, this production structure changes to some extent, but catalytically cracked gasoline still can account for larger specific gravity, so catalytic cracking unit still need to be in this device the olefin(e) centent of catalytically cracked gasoline is reduced to certain level, could satisfy the requirement that gasoline is in harmonious proportion.Especially for take catalytic cracking unit as the main middle-size and small-size refinery that produces gasoline, the demand of Reducing Olefins in FCC Gasoline is higher.Studies show that catalytically cracked gasoline is cut into the weight gasoline component, alkene mainly is distributed in the petroleum naphtha, and olefin(e) centent is relatively less in the heavy petrol.Therefore, to petroleum naphtha carry out freshening can reduction catalytic gasoline by a relatively large margin in the content of alkene, and can reduce the loss that the full cut freshening of gasoline causes gasoline fraction.Present technique is divided into weight gasoline to catalytic cracking fractionation part raw gasline, and petroleum naphtha goes riser reactor to carry out the freshening reaction, and heavy petrol goes the absorption steady component of catalytic cracking unit to absorb stable.
According to the literature, patent CN1542085A, CN1493654A, CN1144259 have described the method that several gasoline separate.
CN1542085A discloses a kind of separation method of catalytically cracked gasoline, the method increases gasoline splitter newly, the stable gasoline that catalytic cracking is absorbed the steady component output is introduced gasoline splitter, with gasoline separation tower stable gasoline is divided into two cuts of weight gasoline, adopt the catalytic cracking stage casing to reflux as thermal source at the bottom of the gasoline splitter, petroleum naphtha removes ether-based device, and a heavy petrol part goes out device, and a part is replenished the most absorption agent and gone to the absorption tower.Fully different on raw material, operational path and equipment from the present invention.
CN1493654A discloses separation method and the device of catalytic gasoline upgrading oil gas, this technology is: upgrading oil gas enters a simple and easy separation column, bottom and slurry oil at simple and easy separation column carry out countercurrent flow and washing catalyst powder, cooled oil gas is up, in knockout tower, carry out the separation of gasoline fraction, diesel oil distillate, reacted gas, the superfluous heat of upgrading oil gas is taken out by slurry oil, and generating steam.From fully different on purpose of the present invention, raw material, operational path and the equipment.
CN1144259 is a kind of method of making low-sulphur oil, can be divided into the straight-run spirit as the reformer raw material three cuts, and then sulphur falls in hydrogenation.Fully different on raw material, operational path and equipment from the present invention.
Summary of the invention
The purpose of this invention is to provide the simple and easy separation method that a kind of catalytically cracked gasoline is divided into weight gasoline, increase a gasoline tripping device in existing or newly-built catalytic cracking unit, catalytically cracked gasoline is divided into weight gasoline.Olefin(e) centent is high in the petroleum naphtha, return reactive moieties and carry out freshening, making conversion of olefines wherein is the hydro carbons such as isoparaffin, aromatic hydrocarbons, thereby reduces the olefin(e) centent of catalytically cracked gasoline, and heavy petrol goes to absorb that steady component absorbs, desorb, stabilization process obtain stable gasoline.
The simple and easy separation method that catalytically cracked gasoline of the present invention is divided into weight gasoline is at catalytic cracking fractionating tower top raw gasline to be divided into weight gasoline, petroleum naphtha goes riser reactor to carry out the freshening reaction, and heavy petrol goes the absorption steady component of catalytic cracking unit to absorb stable.Set up heavy petrol separator, heavy petrol pump, petroleum naphtha oil-gas separator, petroleum naphtha pump and relevant pipeline at the separation column top of catalytic cracking unit.
The simple and easy separation method that catalytically cracked gasoline of the present invention is divided into weight gasoline provides a kind of less investment, flow process is simple, easy to operate, energy consumption the is low raw gasline with catalytic cracking fractionation part to be divided into the method for weight gasoline fraction, when content of olefin in gasoline greater than 35% the time, by present method the olefin(e) centent of gasoline is down to below 35%.Present method is applicable to China and adopts gasoline reprocessing to reduce the catalytic cracking unit of content of olefin in gasoline.
Description of drawings
Fig. 1 is conventional catalytic cracking fractionating tower top system block diagram
Fig. 2 is the block diagram of the inventive method and device
Equipment: 1 separation column, 2 fractionation cat head oil gas air coolers, 3 heavy petrol oil-gas separators, 4 heavy petrol pumps, 5 fractionation cat head oil gas condensation water coolers, 6 petroleum naphtha oil-gas separators, 7 acid water pumps, 8, petroleum naphtha pump, 9 heavy petrol pumps, 10 heavy petrol water coolers, 11 fractionation cat head oil-gas separators, 12 raw gasline pumps, 13 top turning oil cooling devices, 14 top turning oil-hot water heat exchangers, 15 top circulating oil pumps
Embodiment
Respectively the method that method and the present invention of conventional catalytic cracking increases the gasoline separate part is described below in conjunction with Fig. 1 and Fig. 2.
Fig. 1 (routine) process description
Introduce separation column 1 from the reaction oil gas (common 490～515 ℃) that catalyst cracker outlet comes from the separation column bottom, from separation column Base top contact oil gas, from side line draw solar oil, heavy gas oil, recycle stock, and tower at the bottom of slurry oil.Separation column generally comprises four stage casings and refluxes, namely reflux in the top pump around circuit,, reflux in two and tower at the bottom of slurry oil reflux, to take out the superfluous heat of separation column.Fractionation cat head oil gas enters separation column top oil-gas separator 11 through fractionation cat head oil gas air cooler 2, fractionation cat head oil gas condensation water cooler 3 after being cooled to 40 ℃, carry out gas-liquid water three phase separation, isolate gas phase and remove rich gas compressor, raw gasline, sour water remove to absorb steady component by raw gasline pump 12 and acid water pump 7.Fractionation cat head cold reflux is in series successively by top turning oil cooling device 13, top turning oil-hot water heat exchanger 14, top circulating oil pump 15.
Fig. 2 (the present invention) process description
Flow process of the present invention is to set up the heavy petrol separator at the separation column top of catalytic cracking unit, the heavy petrol pump, the petroleum naphtha oil-gas separator, petroleum naphtha pump and relevant pipeline, fractionation cat head oil gas is distillated from separation column 1 top be cooled to 50～70 ℃ through fractionation cat head oil gas air cooler 2 first, enter heavy petrol oil-gas separator 3, carry out gas-liquid water three phase separation, isolated sour water removes to absorb steady component by acid water pump 7, a heavy petrol part is returned the fractionation cat head as fractionation cat head cold reflux by heavy petrol pump 4, replace the fractionation top pumparound, remaining heavy petrol is by heavy petrol pump 9, the heavy petrol water cooler goes to absorb the absorption tower of steady component, after the oil gas that the heavy petrol oil-gas separator is told is cooled to 40 ℃ through fractionation cat head oil gas condensation water cooler 5, enter petroleum naphtha oil-gas separator 5, carry out gas-liquid water three phase separation, isolating petroleum naphtha returns reactive moieties by petroleum naphtha pump 8 and carries out freshening, isolate gas phase and remove rich gas compressor, sour water removes to absorb steady component by acid water pump 7.
Claims (1)
1. a catalytically cracked gasoline is divided into the simple and easy separation method of weight gasoline, it is characterized in that: fractionation cat head oil gas distillates from the fractionation cat head and is cooled to 50～70 ℃ through fractionation cat head oil gas air cooler first, enter the heavy petrol oil-gas separator, carry out gas-liquid water three phase separation, isolated sour water enters acid water pump, a heavy petrol part is returned the fractionation cat head as fractionation cat head cold reflux, replace the fractionation top pumparound, remaining heavy petrol enters the absorption tower that absorbs steady component, enter the petroleum naphtha oil-gas separator after the oil gas that the heavy petrol oil-gas separator is told is cooled to 40 ℃ through fractionation cat head oil gas condensation water cooler again and carry out gas-liquid water three phase separation, isolated petroleum naphtha returns reactive moieties and carries out freshening, isolate gas phase and remove rich gas compressor, sour water removes to absorb steady component.
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| CN2012100975572A CN103361105A (en) | 2012-04-05 | 2012-04-05 | Simple separation method for separating catalytic cracking gasoline into heavy gasoline and light gasoline |
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| CN2012100975572A CN103361105A (en) | 2012-04-05 | 2012-04-05 | Simple separation method for separating catalytic cracking gasoline into heavy gasoline and light gasoline |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567288A (en) * | 2015-12-17 | 2016-05-11 | 海南汉地阳光石油化工有限公司 | Light hydrocarbon recycling system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356372A (en) * | 2000-12-05 | 2002-07-03 | 中国石油化工股份有限公司 | Catalytic cracking process for reducing content of olefin in gasoline |
| US20030047489A1 (en) * | 2001-09-07 | 2003-03-13 | Khare Gyanesh P. | Desulfurization and novel sorbent for same |
| CN1542085A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Method for separating catalytically cracked gasoline |
| CN101191081A (en) * | 2006-11-30 | 2008-06-04 | 中国石油化工股份有限公司 | Catalytic conversion method for hydrocarbon oil raw material |
| CN101659876A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气股份有限公司 | Method for saving energy and producing more propylene in absorption-stabilization system by catalytic cracking |
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2012
- 2012-04-05 CN CN2012100975572A patent/CN103361105A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1356372A (en) * | 2000-12-05 | 2002-07-03 | 中国石油化工股份有限公司 | Catalytic cracking process for reducing content of olefin in gasoline |
| US20030047489A1 (en) * | 2001-09-07 | 2003-03-13 | Khare Gyanesh P. | Desulfurization and novel sorbent for same |
| CN1542085A (en) * | 2003-04-29 | 2004-11-03 | 中国石油化工股份有限公司 | Method for separating catalytically cracked gasoline |
| CN101191081A (en) * | 2006-11-30 | 2008-06-04 | 中国石油化工股份有限公司 | Catalytic conversion method for hydrocarbon oil raw material |
| CN101659876A (en) * | 2008-08-29 | 2010-03-03 | 中国石油天然气股份有限公司 | Method for saving energy and producing more propylene in absorption-stabilization system by catalytic cracking |
Non-Patent Citations (1)
| Title |
|---|
| 赵小平 等: "催化裂化汽油降烯烃技术的研究进展", 《石油化工应用》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567288A (en) * | 2015-12-17 | 2016-05-11 | 海南汉地阳光石油化工有限公司 | Light hydrocarbon recycling system and method |
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Application publication date: 20131023 |