CN1986744A - Catalytic cracker with internal tubular settler - Google Patents
Catalytic cracker with internal tubular settler Download PDFInfo
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- CN1986744A CN1986744A CN 200710000133 CN200710000133A CN1986744A CN 1986744 A CN1986744 A CN 1986744A CN 200710000133 CN200710000133 CN 200710000133 CN 200710000133 A CN200710000133 A CN 200710000133A CN 1986744 A CN1986744 A CN 1986744A
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Abstract
The present invention is fluid catalytic cracker with fast separation of oil gas from catalyst. The fluid catalytic cracker has a riser with outlet connected to thick coiled pipe inside the tube settler, a stripping device below the tube settler, a catalyst regenerator connected through pipe tot lower end of the stripping device, and a top coiled pipe outside the tube settler. The fluid catalytic cracker can realize the efficient and fast gas-solid separation in the separation efficiency as high as 99.99 %, reduce average oil gas residence time to less than 2-3 sec and decrease scaling, and has compact structure and low cost.
Description
Technical field
The invention belongs to the petrochemical technology field, relate to oil gas and the sharp separation process of catalyzer and the quick spill process of oil gas of oil-refining chemical technology and equipment thereof, particularly fluid catalytic cracking process.
Background technology
Fluid catalytic cracking process is one of important oil product lighting technology of petroleum refining industry.Catalytic cracking process mainly comprises reactive system, regeneration system rapidly and fractionating system, and the absorbing-stabilizing system in fractionating system downstream.The reactive system of fluidized catalytic cracker and regeneration system rapidly are its cores, and major equipment comprises riser reactor, settling vessel, revivifier etc.In catalytic cracking process, riser reactor is the main place of raw material oil gas generation catalytic cracking, and the mixture of catalyzer and raw material oil gas is by 2～4 seconds time of riser reactor.But oil gas and catalyzer contact and reaction is not only to be confined in the riser reactor, after leaving riser reactor, if untimely carrying out separating or taking other measure termination reaction of oil gas and catalyzer, oil gas still can continue reaction under the effect of catalyzer, secondary promptly takes place cross cracking reaction, purpose product gasoline and diesel oil change into non-purpose product, cause the purpose product losses, and cause the coking of reactive system.Therefore, require catalyzer and reacted oil gas sharp separation.In addition, secondary also can take place and cross cracking reaction in the reaction oil gas overstand under hot environment with after the catalyst separating, causes the loss of purpose product and the coking of reactive system equally, need draw fast.
For solving separation problem fast gas-solid separator need be installed in exit, refinery fluidized catalytic cracker riser reactor top, to realize separating of oil gas and catalyzer, stopping unnecessary secondary crosses cracking reaction on the one hand, reclaims valuable catalyzer on the other hand and regenerates.This class tripping device has two big classes at present, the first kind is the inertia gas-solid separating device, it is that the gas-solid two-phase inertia difference that relies on the oil gas contain a large amount of granules of catalyst sharply to change flow direction to be produced realizes gas solid separation, typical inertia gas-solid separating device has multiple structures such as inverted L shape, T type, trilobal cross, be characterized in that pressure drop is little, generally be no more than 5kPa, but separation efficiency be lower, have only 70%～80%, the contact probability of oil gas and catalyzer is big.Oil gas after the separation rises at a slow speed in the bigger settling vessel of diameter, general about cyclonic separator (being called for short the top revolves) that just can enter the settling vessel top in 20 seconds, at the granules of catalyst that medial rotation further separation oil and gas in top is carried secretly, enter collection chamber afterwards and gather, draw through gas pipeline again.Fallen into the stripper of settling vessel bottom by the isolating catalyzer of inertia gas-solid separating device, pushed up the catalyzer that revolves capture also enters the settling vessel bottom along dipleg stripper, these catalyzer that separate stick and are carrying a certain amount of oil gas secretly, need in stripper, come out with steam stripped, this part oil gas that stripping comes out needs rise to the top of settling vessel from the bottom of settling vessel about time more than 60 seconds, enters the top and screws in mouth.Because the residence time of this part oil gas in the settling vessel large space is longer, the result was the overall average residence time of reacted oil gas in settling vessel 20～30 seconds, the back-mixing rate height of oil gas, be easy to take place high temperature secondary and cross cracking reaction, yield of light oil is reduced, and cause the inner serious coking of settling vessel, influence the device long-term operation.Especially process the catalytic cracking unit of heavy raw oil (as residual oil), this problem is more apparent outstanding.
Second class is centrifugal gas-solid separating device, and the strong centrifuge field that it relies on the gas-solid two-phase mixture rotation to form realizes the gas-solid sharp separation.The typical application example is the one group of cyclonic separator of outlet direct connection (be called for short and slightly revolve) at riser reactor, and its gas solid separation efficient can reduce the contact probability between oil gas and the catalyzer up to more than 98%.The oil gas of isolating most of catalyzer enters settler space from slightly revolving the riser discharge, rise with slower speed, revolve on the top that enters the settling vessel top through the time more than 10 seconds, oil gas revolves by the top and enters collection chamber after the catalyzer that will carry secretly further separates and gather, and draws through gas pipeline again.Slightly revolved isolating catalyzer and top and revolve isolating catalyzer and fall into settling vessel bottom stripper, these catalyzer that separate stick and are carrying a certain amount of oil gas secretly, need come out with steam stripped in stripper equally.Because thick spin material leg is to discharge catalyzer under the positive pressure differential, so when discharging catalyzer, have not only that entrained oil gas flows downward between the granules of catalyst, also have under the positive pressure differential from thick spin material leg the oil gas of ejection downwards, this part oil and gas content accounts for 6%～10% of total oil and gas content.The oil gas that these oil gas and stripping come out converges, the top medial rotation that rises at a slow speed and enter settling vessel top at the settling vessel large space.About 10～20 seconds of the overall average residence time of oil gas in settling vessel at high temperature still existed secondary to cross the cracking reaction problem, influenced yield of light oil, caused coking in the settling vessel simultaneously, influenced the long period safe handling of device.
For solving the low problem of first kind inertia fast gas-solid separator separation efficiency, U.S. Pat 4,495,063 (1985) has developed ejection type gas-solid fast separating process and device, its gas solid separation efficient is 80%～90%, and the gas backmixing rate is reduced to about 20%, but pressure drop is up to thousands of handkerchiefs, turndown ratio is less, and industrial application has certain difficulty.United States Patent (USP) 4,364,905 (1982), US5,294,331 (1994), US5,364,515 (1994), US5,393,414 (1995) improve again the ejection type fast gas-solid separator, mainly are in order further to shorten the mean residence time of oil gas in settling vessel.But the separation efficiency of ejection type fast gas-solid separator is still not high, and the little shortcoming of turndown ratio and unresolved.
For solving the problem that the centrifugal gas-solid separating device of second class exists, mainly carry out for two kinds at cyclonic separator and arm-type fast minute device of eddy flow.To cyclonic separator, mainly carry out structure and dimensionally-optimised, riser outlet and the dipleg outlet to cyclonic separator simultaneously improves.U.S. Pat 4,502,947 (1985), US4,579,716 (1986), US4,624,772 (1986) etc. have developed enclosed direct connection cyclone separation system, to slightly revolve riser directly links to each other with settling vessel top cyclone inlet, avoided the diffusion in settling vessel of oil gas and catalyzer, shortened the residence time of oil gas in settling vessel greatly, made the back-mixing rate of gas further drop to 6%～10%, but the poor-performing of compressive resistance fluctuation is wanted SC when going into operation.Japan special permission clear 61-25413 of communique (B2) (1986) and U.S. Pat 4,482,451 (1984) have then adopted the arc bend pipe of several downward-sloping certain angles to form arm-type fast minute device of eddy flow as the gas-solid quick disconnector at the riser tube end, and add a seal bootr outside to realize drawing fast of oil gas.In U.S. Pat 5,314, in 611 (1994), also with the arm-type gas-solid sharp separation of a kind of eddy flow with seal bootr, can realize that the efficient sharp separation and the oil gas of catalyzer draws fast, but this patent does not specify the concrete structure of the arm-type fast gas-solid separator of this eddy flow, and the oil gas detention space outside the seal bootr is big, makes the overstand of oil gas.Chinese patent CN01100418.5 (2004) discloses the multistage whirlwind-type of a kind of employing and has divided the device series connection to form compact type gas-solid Quick Separation System soon.Chinese patent CN02159408.2 (2005) discloses a kind of whirlwind-type with the shunting tube and has divided device soon, but the separation efficiency of arm-type fast minute device of eddy flow generally is lower than cyclonic separator, and structure is also than whirlwind separator complexity.The application prerequisite of above-mentioned these patents has all kept traditional settling vessel, is to carry out at the inside of settling vessel large space.
Draw the problem of existence fast for solving oil gas, promptly solve the problem of oil gas overstand in settling vessel.At adopting the fast separation device that slightly revolves as the riser tube outlet, above-mentioned U.S. Pat 4,502,947 (1985), US4,579,716 (1986), US4,624,772 (1986) etc. adopt enclosed direct connection cyclone separation system, directly link to each other with settling vessel top cyclone inlet by will slightly screwing on portion's riser, and the diffusion of exit oil gas in settling vessel slightly revolved in minimizing, reduce the residence time of oil gas in settling vessel, but this also unresolved problem that slightly screws off portion's dipleg discharge oil gas, the slow rising in settling vessel of this part oil gas just can enter the top and revolve, and has the problem of overstand.U.S. Pat 5 subsequently, 158,669 (1992), US5,314,611 (1994), European patent EP 0593827A1, Chinese patent CN92112441 (1992) etc. have directly connected a stripping stage in the portion of screwing off slightly again, change reaction oil gas from the thick spin material leg rough sledding of ejection downwards, further shortened the mean residence time of reaction back oil gas in settling vessel, oil gas back-mixing rate is further dropped to below 2%.In recent years, domestic Chinese Petroleum Univ. discloses a kind of gas-solid Quick Separation System (Chinese patent CN96103419.X (2000)) that adds the stripping stage of disappear eddy current baffle plate and stripping baffles in the cyclonic separator bottom, but stripping gas is up by thick medial rotation portion, and this can influence and slightly revolve separation efficiency.Chinese Petroleum Univ. discloses a kind of gas-solid Quick Separation System that adopts the cyclonic separator bottom to add gas-solid close-phase circulation stripper (Chinese patent CN98102166.2 (1998)), stripping gas is up by thick medial rotation portion, can influence the separation efficiency of slightly revolving equally.
Above-mentioned patent has only solved slightly revolves the problem that the oil gas overstand is discharged in the upper and lower, and the come out overstand problem of oil gas of unresolved settling vessel bottom stripper stripping.The stripper stripping come out oil gas in the large space of settling vessel, slowly rise from the bottom through about time more than 60 seconds to the top, enter the top again and revolve.Though it is little that this part oil and gas content accounts for the ratio of total oil and gas content, the oil gas that the stripper stripping comes out generally is heavier oil-gas component, has very big coking tendency, is the main source of wall coking.
It has been recognized that the importance of oil gas and catalyzer sharp separation, number of research projects exploitation oil gas and catalyzer sharp separation technology have been carried out, but cause the overstand problem for oil gas back-mixing in settling vessel, promptly draw the problem of settling vessel fast and pay attention to not enough.Above-mentioned various fast separation device has only solved the problem that oil gas and catalyzer sharp separation and oil gas are drawn, and the residence time problem of unresolved oil gas oil gas in problem, the especially stripper of settling vessel internal return mixing overstand.
For solving the problem of oil gas overstand in settling vessel, oil gas is drawn fast, prevent that the secondary of oil gas under hot environment from crossing cracking reaction and taking place, need effectively to reduce oil gas detention space and the low vt space of oil gas in the settling vessel.But the catalytic cracking unit settling vessel is to be remained by early stage catalytic cracking bed reactor continuity.Though development along with catalytic cracking process, being extensive use of of molecular sieve catalyst, the catalytic cracking reaction time of oil gas is reduced to several approximately seconds from several minutes, early stage catalytic cracking bed reaction process has been improved to the riser tube reaction process, set up riser reactor for this reason, but the catalytic cracking bed reactor is not done corresponding improvement, result's reactor of catalytic cracking unit has in the past developed into the settlement space of granules of catalyst now, promptly change in quality and be settling vessel, settling vessel also constitutes one and holds riser tube work off one's feeling vent one's spleen solid fast separating device and the pressure heat insulating space of revolving, top in addition, lost the function as reactor, the reaction process of oil gas is carried out in riser reactor.But be subjected to the influence of catalytic cracking process evolution, no matter present catalytic cracking unit is transformed, or newly-designedly all remains with traditional settling vessel.
Because the scantlings of the structure of settling vessel is very big, the internal space is bigger, the hydrocarbon flow speed ratio is less, part oil gas is long in the residence time of settling vessel inside, this secondary that has increased oil gas is on the one hand crossed cracking reaction, on-the-spot take off data shows that the secondary of catalytic cracking process reaction oil gas crosses in the large space that cracking reaction mainly occurs in settling vessel, has also increased the coking tendency of oil gas simultaneously; The settling vessel internal space is bigger on the other hand, and the less scouring force to the wall surface of hydrocarbon flow speed ratio is more weak, and detention space, the especially heavy oil catalytically cracking equipment of oil gas coked mass is provided.Numerous factors such as temperature, the oil gas residence time are closely related in depressed Jiao of cycle oil and feedstock property, the settling vessel.But except that the influence of oil gas, technological temperature and pressure, the residence time of oil gas in settling vessel is long, and the regional area catalyst concn is low in the settling vessel, and oil gas and granules of catalyst flow velocity are low to be to cause the oil gas coked mass to be stranded in the major cause of settling vessel wall.Cause the reason of these problems can be summed up as due to the large space of settling vessel.Serious coking problem took place in the heavy oil catalytically cracking equipment of many refinerys, caused the unplanned shutdown of catalytic cracking unit, had directly influenced the long-term operation of catalytic cracking unit.
Therefore the existence of the inner large space of settling vessel is difficult to realize oil gas and the sharp separation of catalyzer and drawing fast of oil gas, thus reduce the unnecessary space in the settling vessel, and the sharp separation equipment of supporting oil gas and catalyzer is very important.
Present exploitation about oil gas and catalyzer sharp separation technology, the exploitation of the quick lead-out process of oil gas all is to carry out under the prerequisite that keeps traditional settling vessel, promptly all riser tubes solid fast separating device of working off one's feeling vent one's spleen, revolve in the space that all is arranged on settling vessel and is held on the top, cause the space of settling vessel very big, the size of settling vessel is difficult to reduce, and there is very big oil gas detention space inside, is difficult to guarantee drawing fast of oil gas.
Summary of the invention
The purpose of this invention is to provide the pipe precipitator catalytic cracking unit that a kind of thick medial rotation is put, and supporting gas-solid sharp separation equipment, be used for the sharp separation of catalytic cracking reaction oil gas and catalyzer and drawing fast of oil gas, the mean residence time of oil gas was reduced in 2～3 seconds, reduce the secondary of oil gas and cross cracking reaction, improve product and distribute, improve yield of light oil; Eliminate the detention space or the oil gas low speed fluid-space of oil gas in the settling vessel simultaneously, solve the problem of coked mass retention effects device long-term operation in the settling vessel.
The pipe precipitator catalytic cracking unit that a kind of thick medial rotation of the present invention is put, comprise revivifier 1, stripper 3, pipe precipitator 5, riser tube 10, primary cyclone (be called for short and slightly revolve) 8, secondary cyclone (being called for short the top revolves) 6, collection chamber 7, tremie pipe 4, it is characterized in that: the exit end of riser tube 10 with slightly revolve 8 by pipe connection, slightly revolve 8 inside that are positioned at pipe precipitator 5, the top of stripper 3; The bottom of pipe precipitator 5 is strippers 3, and the lower end of stripper 3 connects the reclaimable catalyst standpipe or inclined tube to be generated 2 communicates with revivifier 1; 6 outsides that are positioned at pipe precipitator 5 are revolved on the top, and the top is revolved 6 inlet end and linked to each other with the top of pipe precipitator 5, push up to revolve 6 outlet top and connect collection chamber 7.
Catalytic cracking unit of the present invention is characterised in that: described pipe precipitator 5 can adopt straight barrel structure, and is perhaps up big and down small, up-small and down-big, variable-diameter structure small in ends broad in the middle.
Catalytic cracking unit of the present invention is characterised in that: described pipe precipitator 5 is positioned at the top of stripper 3, and the diameter of the diameter of pipe precipitator 5 and stripper 3 is suitable.
Catalytic cracking unit of the present invention is characterised in that: described 8 inside that are positioned at pipe precipitator 5 of slightly revolving, to form by one or two cyclonic separator in parallel, and the rotation direction of cyclonic separator is counterclockwise, or clockwise.
Catalytic cracking unit of the present invention is characterised in that: 6 outsides that are positioned at pipe precipitator 5 are revolved on described top, and the top is revolved 6 inlet end and linked to each other with the top of pipe precipitator 5.
Below in conjunction with accompanying drawing, be described in detail technical scheme of the present invention.
The pipe precipitator catalytic cracking unit that a kind of thick medial rotation of the present invention is put, traditional riser tube that holds is gone out outspoken minute device, the settling vessel of secondary cyclone is reduced into the pipe precipitator 5 suitable with the stripper diameter, it comprises revivifier 1, stripper 3, pipe precipitator 5, riser tube 10, primary cyclone (be called for short and slightly revolve) 8, secondary cyclone (being called for short the top revolves) 6, collection chamber 7, tremie pipe 4, in the pipe precipitator catalytic cracking unit that thick medial rotation is put, the lower end of stripper 3 connects reclaimable catalyst standpipe or inclined tube to be generated 2, and reclaimable catalyst standpipe or inclined tube to be generated 2 communicate with revivifier 1; The catalyzer that falls from stripper 3 enters by reclaimable catalyst standpipe or inclined tube to be generated 2 and carries out manipulation of regeneration the revivifier 1.
Slightly revolve 8 tops that are arranged on stripper 3, the inside of pipe precipitator 5, it is composed in parallel by one or two cyclonic separator, and the rotation direction of cyclonic separator can be counterclockwise or clockwise.The exit end of riser tube 10 with slightly revolve 8 and pass through pipe connection.The gas-solid mixture of reacted oil gas and catalyzer enters from the riser tube exit end and slightly revolves 8 and carry out flash liberation, the catalyzer that separates falls into stripper 3 by dipleg 9 and carries out stripping, oil gas after the separation carries unsegregated thin catalyzer and enters the top of pipe precipitator 5 by slightly revolving 8 exit end, after enter the top and revolve 6 and carry out secondary separation.
The external top of being made up of the cyclonic separator of 2～8 parallel connections, the top of pipe precipitator 5 revolves 6, and the top is revolved 6 outlet and connect collection chamber 7, and collection chamber 7 links with gas pipeline.The top is revolved 6 cyclonic separator number and is decided by the tolerance size of handling, and the rotation direction of cyclonic separator is counterclockwise or clockwise.Enter oil gas and a spot of thin mixture of catalysts of revolving on the top and carry out secondary separation at the top medial rotation, oil gas after the separation enters collection chamber 7 and is drawn fast by gas pipeline and flows to separation column, the catalyzer that separates falls into stripper by tremie pipe 4, behind stripper 3 strippings, connect reclaimable catalyst standpipe or inclined tube to be generated 2, be delivered to revivifier 1 and regenerate by the lower end.
The tremie pipe 4 that 6 lower ends are revolved on the top communicates with stripper 3, and tremie pipe 4 can adopt isometrical or reducing V-type gas control structure, also can adopt flutter valve.
Compare with existing fluidized catalytic cracker, the pipe precipitator catalytic cracking unit that a kind of thick medial rotation of the present invention is put has following unusual effect:
1. the present invention is reduced into the vertical tube suitable with the stripper diameter with traditional settling vessel, oil gas that to be pipe precipitator come out as the stripper stripping and the collecting tubule that slightly revolves the oil gas of separating, adopt the two-stage series connection cyclonic separator to form oil gas and catalyzer Quick Separation System, gas solid separation efficient is more than 99.99%, realized the efficient sharp separation of gas-solid, pipe precipitator can be drawn oil gas fast simultaneously, and in time efficient stripping catalyst, and the three forms one.
2. catalytic cracking unit of the present invention, its scantlings of the structure is dwindled greatly, the oil gas detention space or the oil gas low speed fluid-space of traditional settling vessel have been eliminated, shortened the stroke of oil gas and catalyzer, draw oil gas fast, the mean residence time of oil gas was reduced to below 2～3 seconds, thereby avoided crossing cracking reaction owing to catalyzer and the reaction product long secondary that causes duration of contact, improve light oil yield, the distribution of product is improved.
3. catalytic cracking unit of the present invention has shortened the stroke of oil gas and catalyzer, and oil gas temperature is everywhere reached unanimity, avoided the temperature drop of regional area oil gas, reduce and be condensed into fluid and drip thereby reduced oil gas Yin Wendu, the condensation reaction green coke is attached on the possibility on the wall at last again.
4. catalytic cracking unit of the present invention, there is not the static or low vt space of oil gas mobile, can draw fast, therefore eliminated the problem of being detained because of the low excessively coked mass that causes of oil gas speed, avoid forming the wall coking, the coking problem that has prevented settling vessel existence in the past takes place, and has guaranteed the long-term operation of catalytic cracking unit.
5. catalytic cracking unit of the present invention has been saved cost of equipment greatly, and is simple in structure and compact, reduced production cost.Cooling surface area reduces greatly simultaneously, has reduced the heat radiation energy consumption of catalytic cracking unit, cancels anti-coking steam simultaneously, has good energy-saving effect.
Description of drawings
Fig. 1 is the front view of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and stripper 3 communicates with revivifier 1 by standpipe 2, reactive system and regeneration system rapidly coaxial arrangement.
Fig. 2 is the front view of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and stripper 3 communicates with revivifier 1 by inclined tube 2 to be generated, and reactive system and regeneration system rapidly are arranged in juxtaposition.
Fig. 3 is the front view of the pipe precipitator of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and pipe precipitator 5 adopts up-small and down-big variable-diameter structure.
Fig. 4 is the front view of the pipe precipitator of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and pipe precipitator 5 adopts variable-diameter structure small in ends broad in the middle.
Fig. 5 is the vertical view that slightly revolves the plan of establishment of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and slightly revolves 8 and is made up of 1 cyclonic separator.
Fig. 6 is the vertical view that slightly revolves the plan of establishment of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and slightly revolves 8 and is composed in parallel by 2 cyclonic separators.
Fig. 7 is that the vertical view of the plan of establishment is revolved on the top of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and the top is revolved 6 and composed in parallel by 2 cyclonic separators.
Fig. 8 is that the vertical view of the plan of establishment is revolved on the top of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and the top is revolved 6 and composed in parallel by 3 cyclonic separators.
Fig. 9 is the vertical view that slightly revolves the plan of establishment of a kind of thick medial rotation of the present invention pipe precipitator catalytic cracking unit of putting, and the top is revolved 6 and composed in parallel by 4 cyclonic separators.
Among the figure, 1-revivifier, 2-standpipe (or inclined tube to be generated), 3-stripper, 4-tremie pipe, 5-pipe precipitator, 6-secondary cyclone (being called for short the top revolves), 7-collection chamber, 8-primary cyclone (be called for short and slightly revolve), 9-dipleg, 10-riser tube.
Embodiment
When the pipe precipitator fluidized catalytic cracker that uses a kind of thick medial rotation of the present invention to put, stock oil and recycle stock enter riser tube 10, mix with the regenerated catalyst from revivifier, catalytic cracking reaction takes place in the mixed flow that makes progress under the castering action that promotes steam or lifting dry gas simultaneously.Reaction oil gas and catalyzer enter in the outlet of riser tube 10 and slightly revolve 8 and carry out flash liberation, oil gas after the separation and the oil gas and the steam merging of coming out from the stripper stripping, and carry a small amount of unsegregated thin granules of catalyst, enter the top of pipe precipitator 5, entering the top again revolves 6 and carries out secondary separation, the oil gas separated imports collection chamber 7 and is drawn fast by gas pipeline and flows to separation column, slightly revolved 8 catalyzer of separating and the top is revolved 6 catalyzer of separating and fallen into stripper 3, behind stripper 3 strippings, connect reclaimable catalyst standpipe or inclined tube to be generated 2, be delivered to revivifier 1 by the lower end.Oil gas behind the catalytic cracking reaction separates with catalyst mixture process two stage cyclone separator, and gas solid separation efficient has realized the centrifugal sharp separation of gas-solid up to more than 99.99%.Owing to adopted the pipe precipitator suitable with the stripper diameter, compare with traditional settling vessel, its scantlings of the structure is dwindled greatly, the detention space or the oil gas low speed fluid-space of oil gas have been eliminated, the stroke of oil gas shortens greatly, the mean residence time of oil gas shortened in 2～3 seconds, had realized drawing fast of oil gas.
Claims (6)
1, a kind of thick medial rotation pipe precipitator catalytic cracking unit of putting, comprise revivifier 1, stripper 3, pipe precipitator 5, riser tube 10, primary cyclone (be called for short and slightly revolve) 8, secondary cyclone (being called for short the top revolves) 6, collection chamber 7, tremie pipe 4, it is characterized in that: the exit end of riser tube 10 with slightly revolve 8 by pipe connection, slightly revolve 8 inside that are positioned at pipe precipitator 5, the top of stripper 3; The bottom of pipe precipitator 5 is strippers 3, and the lower end of stripper 3 connects the reclaimable catalyst standpipe or inclined tube to be generated 2 communicates with revivifier 1; 6 outsides that are positioned at pipe precipitator 5 are revolved on the top, and the top is revolved 6 inlet end and linked to each other with the top of pipe precipitator 5, push up to revolve 6 outlet top and connect collection chamber 7.
2, catalytic cracking unit according to claim 1 is characterized in that: described pipe precipitator 5 can adopt straight barrel structure, and is perhaps up big and down small, up-small and down-big, variable-diameter structure small in ends broad in the middle.
3, catalytic cracking unit according to claim 1 is characterized in that: described pipe precipitator 5 is positioned at the top of stripper 3, and the diameter of the diameter of pipe precipitator 5 and stripper 3 is suitable.
4, catalytic cracking unit according to claim 1 is characterized in that: described 8 inside that are positioned at pipe precipitator 5 of slightly revolving, to form by one or two cyclonic separator in parallel, and the rotation direction of cyclonic separator is counterclockwise, or clockwise.
5, catalytic cracking unit according to claim 1 is characterized in that: 6 outsides that are positioned at pipe precipitator 5 are revolved on described top, and the top is revolved 6 inlet end and linked to each other with the top of pipe precipitator 5.
6, catalytic cracking unit according to claim 1 is characterized in that: described top is revolved 6 and is made up of the cyclonic separator of 2～8 parallel connections, and the rotation direction of cyclonic separator is counterclockwise, or clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100001339A CN100497533C (en) | 2007-01-08 | 2007-01-08 | Catalytic cracker of coarse cyclone internal tubular settler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100001339A CN100497533C (en) | 2007-01-08 | 2007-01-08 | Catalytic cracker of coarse cyclone internal tubular settler |
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| CN1986744A true CN1986744A (en) | 2007-06-27 |
| CN100497533C CN100497533C (en) | 2009-06-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010006465A1 (en) * | 2008-07-16 | 2010-01-21 | 上海百金化工集团有限公司 | Production device for carbon disulfide by circulating fluid bed |
| CN102041096A (en) * | 2009-10-15 | 2011-05-04 | 中国石油大学(北京) | Method and device for inhibiting coking of residue fluid catalytic disengager |
| CN103374381A (en) * | 2012-04-26 | 2013-10-30 | 中国石油大学(北京) | Novel connecting mode and component between rough rotator and top rotator in FCC disengager |
| CN113477191A (en) * | 2021-08-09 | 2021-10-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
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2007
- 2007-01-08 CN CNB2007100001339A patent/CN100497533C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010006465A1 (en) * | 2008-07-16 | 2010-01-21 | 上海百金化工集团有限公司 | Production device for carbon disulfide by circulating fluid bed |
| CN102041096A (en) * | 2009-10-15 | 2011-05-04 | 中国石油大学(北京) | Method and device for inhibiting coking of residue fluid catalytic disengager |
| CN102041096B (en) * | 2009-10-15 | 2015-01-21 | 中国石油大学(北京) | Method and device for inhibiting coking of residue fluid catalytic disengager |
| CN103374381A (en) * | 2012-04-26 | 2013-10-30 | 中国石油大学(北京) | Novel connecting mode and component between rough rotator and top rotator in FCC disengager |
| CN103374381B (en) * | 2012-04-26 | 2015-11-25 | 中国石油大学(北京) | Slightly revolve in FCC settling vessel and push up the syndeton between revolving |
| CN113477191A (en) * | 2021-08-09 | 2021-10-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
| CN113477191B (en) * | 2021-08-09 | 2022-03-08 | 中国石油大学(北京) | Reaction device and method for preparing ethylene through oxidative coupling of methane |
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| CN100497533C (en) | 2009-06-10 |
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