CN1239135A - Process for separating catalyst particles from oil slurry after catalytic cracking - Google Patents
Process for separating catalyst particles from oil slurry after catalytic cracking Download PDFInfo
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- CN1239135A CN1239135A CN 99109217 CN99109217A CN1239135A CN 1239135 A CN1239135 A CN 1239135A CN 99109217 CN99109217 CN 99109217 CN 99109217 A CN99109217 A CN 99109217A CN 1239135 A CN1239135 A CN 1239135A
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Abstract
A process for separating catalyst particles from catalytic cracking oil slurry features that three filter apparatus are parallelly connected and the steps of filter, back flushing and diluting are realized for the separation. Its advantages are good combination with catalystic cracking apparatus, simple process, mimimal energy consumption and the highest recovery rates of supernatant oil and catalyst.
Description
The present invention relates to filter method, or rather, is a kind of method of separating remaining granules of catalyst from catalytically cracked oil.
Catalytic cracking is most important a kind of heavy oil lighting technological process in the petroleum refining industry, and it also produces a part of slurry oil except producing stop bracket gasoline, diesel oil and liquefied gas.The fuel value and the residual oil of slurry oil are close, but owing to wherein contain a certain amount of catalyst cracking particles, as boiler oil, can cause collecting ash serious, so the range of application of slurry oil are subjected to certain limitation as directly.For this reason, refinery is squeezed into slurry oil in the jar usually, allows its natural subsidence, then the slurry oil clear liquid after the sedimentation is remake fuel, this natural subsidence method, and the time is longer, weak effect, remaining catalyzer can not be recycled.In CN 86107787A patent application, a kind of " from the method for separating catalyst minuteness particle in the hydrocarbon-containiproducts charging of catalytic cracking unit " proposed, be characterized in making charging to accept filtration with inorganic barrier layer, the strainer of mainly introducing inorganic barrier layer and filtering ring and forming thus with the porosity that adapts with the minimum diameter that need hold back particle by heat-stable.
The objective of the invention is existing filter plant is combined with the catalytic cracking assembling device is good, by simple technological process, to realize separating of catalyst solid particle and slurry oil.
Realize the technical scheme of the object of the invention: three strainers are connected in parallel, and with the backwash gas of catalytic cracked dry gas as strainer, catalytic cracking fractionating system heavy gas oil is formed the system of separating catalyst particles from slurry oil as the filter cake thinner.
Concrete separation method of the present invention may further comprise the steps:
1. be 0.5～2% slurry oil by the catalyst solid particle of extracting out at the bottom of the catalytic cracking unit separation column that contains, filter to entering the slurry oil filtering system after temperature is 300～350 ℃ that its working pressure is 0.5～1.0MPa through heat exchange;
2. the slurry oil clear liquid of the granules of catalyst content≤200ppm after filtering by (1) step is sent into oil tank after the water cooler cooling, as boiler oil;
3. when the pressure of filtering system was reduced to 0.3～0.7MPa, catalytic cracked dry gas was made the back flushing medium, was entered by filter top end, and the catalyzer filter cake is blown off;
Through (3) step after back flushing backwash gas, a spot of slurry oil and clear liquid and the mixture of the catalyzer filter cake that carries of slurry oil send into the filter cake jar;
5. make thinner with heavy gas oil, filter cake in (4) step filter cake jar is released rare, obtain the filter cake diluent;
6. (5) step diluent is delivered to the catalytically cracked stock jar, mix the back with other catalytically cracked material as the catalytic cracking riser charging.
Filtering system of the present invention is the LSI type filter (" oil refining design " that utilizes three U.S. MOTT companies to produce, the 3rd～5 phase, 1997) connect with parallel way, wherein continuous operation is kept in two two unit of strainers composition, when one of them strainer carries out back flushing, then slurry oil improves another strainer, and the 3rd strainer is standby, and each strainer can be born the treatment capacity of whole design discharge separately.Filter operation is carried out under steady flow, when reaching 0.3～0.7MPa pressure and fall, with the pressurization dry gas to the filtering element back flushing, and open the back flushing tapping valve rapidly, produce high oppositely pressure reduction of moment, remaining small amount of liquid and filter cake are drained into the filter cake jar, directly advance the filter cake jar from the heavy gas oil of catalytic cracking fractionating tower and make thinner, after the filter cake liquid of heavy gas oil dilution reaches certain liquid level with the high pressure gas force feed to the catalytically cracked stock jar.
Technological process of the present invention can realize control automatically by the PLC controller.
Major advantage of the present invention and effect:
The filtering system of the inventive method can combine with catalytic cracking unit is good, and used back flushing medium and thinner are all from catalytic cracking unit, and the filter cake liquid after the dilution can be used as catalytically cracked material;
Method technology of the present invention is simple, use three LSI type filters to form filtering system, can minimum consumption obtain maximum slurry oil clear liquids, maximum recycling catalyzer, to device operating influence minimum, and the remarkable in economical benefits that obtains, as 1,500,000 tons of/year normal pressures, 800,000 tons/year catalytically cracking heavy oil device, the long residuum that obtains with North China crude oil is a raw material, adopt 23760 tons in the annual filterable oil slurry of method of the present invention, reclaim 22572 tons of slurry oil clear liquids, the rate of recovery 95% reclaims 236.4 tons of catalyzer (designing treatment amount).
Further set forth characteristics of the present invention below by specific embodiment and combined process schema:
Embodiment
Fig. 1 is the present invention's separating catalyst particles schematic flow sheet from catalytic slurry.
By shown in Figure 1,2-1 among the figure～2～3 are the LSI strainer, and 11 is the dry gas jar, and 12 is the filter cake jar.
Idiographic flow of the present invention: strainer 2-1～2-3 connects with parallel way, slurry oil is at 300 ± 10 ℃, pressure is to enter one of them strainer from conduit 1 under 0.65～0.7Mpa, in strainer slurry oil from interior by outside, from descending by the last flow direction, filter back slurry oil clear liquid by conduit 3 outer getting rid of to the tank field, (the pressure difference of conduit 1 and conduit 3 when reaching predetermined maximum pressure drop 0.3MPa in the strainer, generally reach 0.3MPa and need 2.5～6.5 hours, can be according to practical adjustments to 0.7MPa), enter by the top by conduit 4 strainer is carried out back flushing with the pressurization dry gas, and open the back flushing tapping valve rapidly, produce high oppositely pressure reduction of moment, slurry oil in filter cake and the strainer is drained into filter cake jars 12 outward by conduit 5, this moment, this strainer was finished a filtration cycle, be in stand-by state, when fresh slurry oil flows into once more, then another circulation begins, in filter cake jar 12, use 160～250 ℃ of temperature, flow 2～5t/h heavy gas oil dilutes (also can directly enter the line of return by conduit 7) from 6 pairs of filter cakes of conduit, heavy gas oil carries catalyzer and flow to the catalytic unit charging stock tank by conduit 8, mix the back as the charging of catalysis riser tube with fresh feed, be disposed to the gas pipe network by pipeline 10 after dry gas reaches certain pressure in the filter cake jar 12.
By measuring as can be known deviating from before and after the granules of catalyst in the slurry oil and slurry oil clear liquid solid content, the slurry oil solid content is 3500～11000ppm before taking off, and taking off back clear liquid solid content is 30～60ppm.Adopt emptying housing mode by improving pressure drop or back flushing, also can further improve the yield of slurry oil clear liquid.
Above-mentioned flow process is used for 1,500,000 tons of/year normal pressures of Oil Refinery No.1, Northern China Petroleum Administration and 800,000 tons of/year catalytically cracking heavy oil devices, filter 21600 tons of slurry oils in five months altogether, reclaim 20670 tons of slurry oil clear liquids, the rate of recovery 95.7%, reclaim 85.32 tons of catalyzer, improve a lot than original design treatment capacity.
Claims (2)
1. one kind splits solid catalyst particulate method the slurry oil from catalysis, it is characterized in that sepn process may further comprise the steps.
(1) the catalyst solid granule content of extracting out at the bottom of the catalytic cracking unit separation column is 0.5～2% slurry oil, filters to entering the slurry oil filtering system after temperature is 300～350 ℃ through heat exchange, and its pressure is 0.5～1.0MPa;
(2) after the water cooler cooling, send into oil tank by the slurry oil clear liquid of the granules of catalyst content≤200ppm after the filtration of (1) step;
(3) fall when reaching 0.3～0.7MPa when the pressure of filtering system, make the back flushing medium with the catalytic cracking unit dry gas, the catalyzer filter cake is blown off, described dry gas pressure from catalytic cracking unit is 0.4～0.8MPa;
(4) backwash gas, a spot of slurry oil and clear liquid and the catalyzer filter cake mixture after (3) step back flushing sent into the filter cake jar;
(5) the heavy gas oil thinner is squeezed in (4) step filter cake jar, made the filter cake dilution, obtain the filter cake diluent;
(6) (5) step diluent is sent into the catalytically cracked stock jar, mix with other catalytically cracked stock, as the catalytic cracking riser charging.
2. in accordance with the method for claim 1, it is characterized in that described filtering system is connected with parallel way by three LSI type filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99109217 CN1239135A (en) | 1999-06-22 | 1999-06-22 | Process for separating catalyst particles from oil slurry after catalytic cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99109217 CN1239135A (en) | 1999-06-22 | 1999-06-22 | Process for separating catalyst particles from oil slurry after catalytic cracking |
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| Publication Number | Publication Date |
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| CN1239135A true CN1239135A (en) | 1999-12-22 |
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| CN 99109217 Pending CN1239135A (en) | 1999-06-22 | 1999-06-22 | Process for separating catalyst particles from oil slurry after catalytic cracking |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798523A (en) * | 2010-03-16 | 2010-08-11 | 李守春 | Auxiliary filtering method of heavy oil |
| CN102002385A (en) * | 2010-12-07 | 2011-04-06 | 上海蓝科石油化工有限公司 | Device and method for separating residue from catalytic cracking oil slurry |
| CN102151433A (en) * | 2011-01-30 | 2011-08-17 | 王丹宁 | Oil slurry filtering device with two-stage filtration for catalytic cracking device |
| WO2011147173A1 (en) * | 2010-05-27 | 2011-12-01 | 北京中天元环境工程有限责任公司 | Device and method for filtering catalytic cracking slurry oil |
| CN102559249A (en) * | 2010-12-21 | 2012-07-11 | 湖南晟通科技集团有限公司 | Method for improving combustion efficiency of slurry oil |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN101633849B (en) * | 2009-08-21 | 2013-03-27 | 广东新华粤石化股份有限公司 | Method for removing catalyst powder from catalytic cracking slurry oil |
| CN104174210A (en) * | 2014-09-10 | 2014-12-03 | 张春阳 | Noble metal catalyst filter and noble metal catalyst filtering and recycling method |
| CN104888984A (en) * | 2014-03-05 | 2015-09-09 | 中国石化工程建设有限公司 | Magnetic cyclone separator, separation apparatus and separation method |
| CN109759395A (en) * | 2019-03-12 | 2019-05-17 | 胜帮科技股份有限公司 | A kind of backwash technique and back-purge system for catalytic hydrogenation reaction system |
| CN111589224A (en) * | 2019-02-20 | 2020-08-28 | 中国石油化工股份有限公司 | Multistage filtering system and method for oil slurry |
| CN111592909A (en) * | 2019-02-20 | 2020-08-28 | 中国石油化工股份有限公司 | Oil slurry filtering system and oil slurry filtering method thereof |
| CN114642892A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Method for recovering light components from tower kettle of fractionating tower of catalytic device |
-
1999
- 1999-06-22 CN CN 99109217 patent/CN1239135A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633849B (en) * | 2009-08-21 | 2013-03-27 | 广东新华粤石化股份有限公司 | Method for removing catalyst powder from catalytic cracking slurry oil |
| CN101798523A (en) * | 2010-03-16 | 2010-08-11 | 李守春 | Auxiliary filtering method of heavy oil |
| WO2011147173A1 (en) * | 2010-05-27 | 2011-12-01 | 北京中天元环境工程有限责任公司 | Device and method for filtering catalytic cracking slurry oil |
| CN102002385A (en) * | 2010-12-07 | 2011-04-06 | 上海蓝科石油化工有限公司 | Device and method for separating residue from catalytic cracking oil slurry |
| CN102002385B (en) * | 2010-12-07 | 2014-08-06 | 上海蓝科石化工程技术有限公司 | Device and method for separating residue from catalytic cracking oil slurry |
| CN102559249A (en) * | 2010-12-21 | 2012-07-11 | 湖南晟通科技集团有限公司 | Method for improving combustion efficiency of slurry oil |
| CN102559249B (en) * | 2010-12-21 | 2014-06-04 | 晟通科技集团有限公司 | Method for improving combustion efficiency of slurry oil |
| CN102151433A (en) * | 2011-01-30 | 2011-08-17 | 王丹宁 | Oil slurry filtering device with two-stage filtration for catalytic cracking device |
| CN102585895B (en) * | 2012-03-14 | 2014-06-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN102585895A (en) * | 2012-03-14 | 2012-07-18 | 李志英 | Separation method for solid particles in catalytic slurry oil |
| CN104888984A (en) * | 2014-03-05 | 2015-09-09 | 中国石化工程建设有限公司 | Magnetic cyclone separator, separation apparatus and separation method |
| CN104174210A (en) * | 2014-09-10 | 2014-12-03 | 张春阳 | Noble metal catalyst filter and noble metal catalyst filtering and recycling method |
| CN111589224A (en) * | 2019-02-20 | 2020-08-28 | 中国石油化工股份有限公司 | Multistage filtering system and method for oil slurry |
| CN111592909A (en) * | 2019-02-20 | 2020-08-28 | 中国石油化工股份有限公司 | Oil slurry filtering system and oil slurry filtering method thereof |
| CN111592909B (en) * | 2019-02-20 | 2021-06-25 | 中国石油化工股份有限公司 | Oil slurry filtering system and oil slurry filtering method thereof |
| CN109759395A (en) * | 2019-03-12 | 2019-05-17 | 胜帮科技股份有限公司 | A kind of backwash technique and back-purge system for catalytic hydrogenation reaction system |
| CN114642892A (en) * | 2020-12-18 | 2022-06-21 | 中国石油化工股份有限公司 | Method for recovering light components from tower kettle of fractionating tower of catalytic device |
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