CN1519296A - Distributor of catalyzer to be generated in fluid catalytic cracking unit - Google Patents
Distributor of catalyzer to be generated in fluid catalytic cracking unit Download PDFInfo
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- CN1519296A CN1519296A CNA031263364A CN03126336A CN1519296A CN 1519296 A CN1519296 A CN 1519296A CN A031263364 A CNA031263364 A CN A031263364A CN 03126336 A CN03126336 A CN 03126336A CN 1519296 A CN1519296 A CN 1519296A
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- reclaimable catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
- B01J8/0035—Periodical feeding or evacuation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00743—Feeding or discharging of solids
- B01J2208/00752—Feeding
Abstract
A distributor of the catalyst to be regenerated for fluidized catalytic cracking apparatus is composed of a horizontal trunk connected to the catalyst inlet tube, catalyst delivering pipe, fluidizing wind pipe, horizontal or inclined branch pipe at both sides of said trunk, and antiwear nozzles connected to bottom wall of said branch pipe. It can uniformly distribute the catalyst to be regenerated in regenerator.
Description
Technical field
The present invention relates to a kind of reclaimable catalyst divider that is used for petroleum chemical industry hydrocarbon raw material fluidized catalytic cracker.
Background technology
In fluid catalytic cracking (the being FCC) device of petroleum chemical industry, the catalyzer that reacted in riser reactor enters stripping stage after cyclonic separator separates, remove the most oil gas that adheres to stripped vapor from catalyzer; This part catalyzer (being reclaimable catalyst) passes through reclaimable catalyst introduction pipe line (referring to inclined tube to be generated or regeneration standpipe) again and enters revivifier then, behind coke burning regeneration, reenters riser reactor and stock oil reacts, thereby finishes full cycle.In the part fluidized catalytic cracker of China, the side that catalyzer behind the stripping does not just directly enter revivifier from the reclaimable catalyst introduction pipe line through any distribution, distribution in revivifier and burn very inhomogeneous, have a strong impact on the carbon content distribution of the regeneration effect and the regenerated catalyst of catalyzer, thereby also influenced the homogeneity and the quality product of riser tube reaction depth.Particularly in recent years, fluidized catalytic cracker is to large scale development, and treatment capacity develops into 3.5 hundred ten thousand tons/year by original 1.0 hundred ten thousand tons/year; The diameter of revivifier is generally all very big, does not wait from 5 meters to 10 meters, and the radial distribution of catalyzer more becomes a considerable major issue.Specifically, on the one hand, the regenerated catalyst carbon content of reclaimable catalyst on the suction side is apparently higher than the regenerated catalyst carbon content at its position, opposite in the revivifier, and in empyreumatic process, because the carbon of on the suction side is more, thereby makes the heat that burns generation also more, so the temperature at this position is also than the temperature height at other position, make the radial temperature difference in the revivifier bigger, the revivifier radial temperature difference that has can reach tens degrees centigrade.On the other hand, because reclaimable catalyst skewness in revivifier, also may cause the part catalyzer just directly to be entered the situation of riser reactor, thereby directly influence the quality of catalyzed reaction ability and product by reduction (referring to that the regenerated catalyst carbon content is higher than its mean value) fully because of lacking oxygen.The 3rd, because the distribution inequality of catalyzer, cause carbon monoxide in the dense catalyst bed in the dilute catalyst phase bed, to mix and burn with oxygen, generation dilute phase tail fires; The dilute phase temperature sharply rises, and more than high tens degree of the temperature in the dense catalyst bed, thereby the heatproof and the strength problem of this equipment component has been proposed higher requirement, or has caused the damage of equipment in the revivifier dilute phase section thus.Therefore, exploitation reclaimable catalyst divider, with the reclaimable catalyst uniformly distributing in revivifier, to reduce radial temperature difference in the revivifier, eliminate the combustion of dilute phase tail, stable and raising catalyzed reaction ability and quality product, crucial meaning is arranged.Peak concentration when the radial distribution that reclaimable catalyst is good also can make full use of gas-solid and initially contacts is poor, improves transfer rate, thereby improves carbon-burning capacity.
At present, some patents about fluidized catalytic cracker reclaimable catalyst divider aspect are arranged, as U.S. Pat P5773378 and USP5635140 abroad.The described divider of USP5635140 is, reclaimable catalyst enters the sleeve of reclaimable catalyst divider through the reclaimable catalyst introduction pipe line, upwards is delivered to the groove arm that is positioned at upper cartridge then.This divider generally is provided with six downward-sloping groove arms, and each groove arm is the mobile groove of a catalyzer.Reclaimable catalyst mainly flows out from the end outlet of each groove arm and enters revivifier, and the distribution of the below reclaimable catalyst of each groove arm is relatively poor.What the USP5773378 patent was described is, reclaimable catalyst enters revivifier by the side of revivifier, the reclaimable catalyst divider links to each other with the outlet of reclaimable catalyst introduction pipe line, by the gas supply line bubbling air reclaimable catalyst is transported to the level pipe of divider by the reclaimable catalyst introduction pipe line, is delivered to a vertical pipeline section that links to each other with level pipe then downwards.In a kind of embodiment, reclaimable catalyst enters in the revivifier by the outlet that typically is set to the arm end under six be tilted to that is arranged on the vertical tube pars infrasegmentalis; Because catalyzer can only flow into revivifier from each arm end outlet, catalyst-free falls in divider self radius, so the distributing uniformity of reclaimable catalyst is limited.Therefore, cause that oxygen content remains on 2 volume % in the regenerated flue gas that the revivifier of this patent discharges, the carbon residue content on the regenerated catalyst is 0.05 weight %, and it also is not very desirable burning effect.The higher meeting of regenerated catalyst carbon content causes a series of problems such as activity of such catalysts reduction.Therefore, the distribution effects for the reclaimable catalyst divider also needs to improve.
Summary of the invention
Technical problem to be solved by this invention is: the distributing uniformity of the existing reclaimable catalyst of above-mentioned existing reclaimable catalyst divider is relatively poor, and what cause revivifier burns that effect is undesirable, regenerated catalyst carbon content problem of higher.
For addressing the above problem, the technical solution used in the present invention is: a kind of fluidized catalytic cracker reclaimable catalyst divider, comprise a horizontally disposed circulation person in charge, the end that circulation is responsible for is inlet, link to each other with the outlet of reclaimable catalyst introduction pipe line, it is characterized in that: the inlet end longshore current that circulation is responsible for is logical be responsible for be axially arranged with catalyst transport airduct and fluidisation airduct, the fluidisation airduct is located at the below of carrying airduct, the both sides that circulation is responsible for are provided with a circulation arm respectively at least, one end of circulation arm is responsible for circulation and is linked to each other, the other end is outlet, circulation arm level or be tilted to down setting, the bottom tube wall of circulation arm is provided with wear-resisting nozzle, and wear-resisting jet exit is provided with downwards.
A kind of fluidized catalytic cracker reclaimable catalyst divider as special case of the present invention, comprise a horizontally disposed circulation person in charge, the end that circulation is responsible for is inlet, link to each other with the outlet of reclaimable catalyst introduction pipe line, it is characterized in that: the inlet end longshore current that circulation is responsible for is logical be responsible for be axially arranged with catalyst transport airduct and fluidisation airduct, the fluidisation airduct is located at the below of carrying airduct, the bottom that circulation is responsible for is provided with a circulation arm vertically downward at least, the upper end of circulation arm is responsible for circulation and is linked to each other, the lower end is outlet, the circulation arm is provided with wear-resisting nozzle on the both sides tube wall relative with the vertical plane of being responsible for axial line by circulation, wear-resisting jet exit is tilted to down setting.
Adopt the present invention, can obtain following beneficial effect: reclaimable catalyst divider of the present invention is located in the revivifier of fluidized catalytic cracker, reclaimable catalyst is after the outlet of reclaimable catalyst introduction pipe line enters the reclaimable catalyst divider, under the conveying wind and fluidisation wind action that feed by catalyst transport airduct and fluidisation airduct, in the circulation of divider is responsible for, be fluidized state and flow that (carrying wind action is that reclaimable catalyst is responsible for the other end that the inlet end that links to each other with the outlet of reclaimable catalyst introduction pipe line is delivered to this pipe by circulation, the fluidisation wind action is to make catalyzer be in fluidized state all the time in divider), make reclaimable catalyst that certain distribution at first be arranged on its diametric(al) after entering revivifier.Reclaimable catalyst during circulation is responsible for flows into the arm that respectively circulates that both sides are responsible in circulation more respectively, is flowed out by the outlet of a plurality of wear-resisting nozzles that are provided with on the outlet of each circulation tube end and circulation arm bottom tube wall then, enters revivifier.Like this, reclaimable catalyst can be distributed more equably on the entire cross section of revivifier.As the circulate bottom be responsible for of special case of the present invention a kind of the reclaimable catalyst divider of circulation arm vertically downward is set, also has similar distribution effects.The distribution condition of above-mentioned reclaimable catalyst will be further detailed with the operating process of divider in conjunction with the accompanying drawings in embodiment part.
Because reclaimable catalyst can enter revivifier more equably and burn after reclaimable catalyst divider of the present invention distributes, thus reclaimable catalyst can be in revivifier homogeneous combustion, to realize holomorphosis.Can reduce radial temperature difference and interior each the regional temperature difference of revivifier in the revivifier significantly, improve the regeneration quality of catalyzer, inhibition also prevents the combustion of revivifier dilute phase section generation tail, reduces secondary combustion, and can increase the operational stability and the turndown ratio of regeneration system rapidly.Can also improve the intensity of burning of revivifier, reduce the carbon content of regenerated catalyst, thereby the catalytic capability of catalyzer is remained on the higher level.Compare with existing reclaimable catalyst divider (as described in USP5773378), regeneration situation with the fluid catalytic cracking molecular sieve catalyst is an example, under the regenerative operation condition of industrial common employing at present, the distribution consistency degree of reclaimable catalyst in revivifier can be improved 30%, the radial temperature difference of internal regenerator can be reduced in 10 ℃.Reclaimable catalyst is after regeneration is burnt, and the carbon content of regenerated catalyst is less than 0.03 weight %.Wherein, the distribution consistency degree of reclaimable catalyst in revivifier is the catalyzer carbon content (weight %) that the catalyzer carbon content (weight %) of revivifier limit wall deducts the revivifier center, the ratio (representing with percentage ratio) of the catalyzer carbon content (weight %) at its difference and revivifier center.The regenerative operation condition (also being the regenerative operation condition that the present invention was suitable for) of industrial common employing at present is: the top pressure of revivifier is 0.1 to 0.2MPa (gauge pressure), the top regeneration temperature is 670 to 690 ℃, the dense-phase catalyst bed tempertaure is 660 to 665 ℃ in the revivifier, and the dense catalyst bed linear gas velocity is 0.6 to 0.9 meter per second.In addition, reclaimable catalyst divider of the present invention also has simple in structure, easy to operate advantage.
Reclaimable catalyst divider of the present invention is applicable to that generally diameter is less than 15 meters revivifier.
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Description of drawings
Fig. 1 is the synoptic diagram that reclaimable catalyst divider of the present invention is arranged in the revivifier axial cross section.
Fig. 2 is the vertical view of reclaimable catalyst divider among Fig. 1, parts such as the interior main air sparger of not shown revivifier.Inclined tube to be generated disconnects, and the conveying airduct and the fluidisation airduct of reclaimable catalyst divider is shown.
Fig. 3 is that A-A among Fig. 1 is to amplification view.
Fig. 4 be B-B among Fig. 3 to amplification view, the circulation arm of reclaimable catalyst divider and the section shape of wear-resisting nozzle are shown; The bottom tube wall of circulation arm is provided with the wear-resisting nozzle of two rows.
Fig. 5 be C-C among Fig. 4 to sectional view, illustrate a section and two set wear-resisting nozzles of circulation arm.
Fig. 6 is the sectional view of reclaimable catalyst divider in the cross section of the axial line of being responsible for perpendicular to circulation that a kind of arm that circulates of the present invention is provided with vertically downward.
Fig. 7 be D among Fig. 6 to view, illustrating one section and one arm that circulates that circulation is responsible for.
Embodiment
Referring to Fig. 1 and Fig. 2, reclaimable catalyst divider 1 of the present invention (abbreviating divider as) is located at the middle part of revivifier 10.It comprises a horizontally disposed circulation person in charge 2, and circulation is responsible for an end of 2 for entering the mouth 201, links to each other with the outlet of reclaimable catalyst introduction pipe line 8 (being inclined tube 8 to be generated in the present embodiment), and 2 the other end 202 sealings are responsible in circulation.The 2 diameter settings along revivifier 10 are responsible in circulation, and the bottom at its two ends is supported by support 7 respectively.The length of the circulation person in charge 2 in revivifier 10 is generally 0.7 to 0.98 times of revivifier 10 diameters.Consider thermal expansion problem, leave certain distance between the wall of its blind end 202 and revivifier 10.The circulation person in charge 2 diameter is generally 0.5 to 1.5 times of inclined tube 8 diameters to be generated; When diameter was unequal, both were connected with reducer.
Circulation be responsible for the 2 inlet 201 end longshore currents that link to each other with the outlet of inclined tube 8 to be generated logical be responsible for 2 be axially arranged with catalyst transport airduct 5 and fluidisation airduct 6, fluidisation airduct 6 is located at the below of conveying airduct 5.One of catalyst transport airduct 5 operated by rotary motion, being located at circulation be responsible on 2 the axial line or axial line near.Carry an end 501 of airduct 5 to link to each other with air supply device, the other end is its outlet 502; Outlet 502 is stretched into circulation and is responsible in 2, and built-in length is responsible for 5% to 20% of 2 length for circulation.One end 601 of fluidisation airduct 6 links to each other with air supply device, the other end 602 sealings.By Fig. 1 and Fig. 2 as seen, fluidisation airduct 6 stretches into the length that circulation is responsible in 2 and is responsible for 2 equal in length basically with circulation.The tube wall of fluidisation airduct 6 is provided with some apertures (figure slightly), flows out for the fluidized wind in the fluidisation airduct 6; The size of aperture, shape, quantity, percentage of open area, similar with the design of existing gas distributor.Fluidisation airduct 6 can be provided with 1 to 4, and the most frequently used is to be provided with 2 to 3.Divider as depicted in figs. 1 and 2, setting be 2 fluidisation airducts 6.
The circulation person in charge 2 both sides are provided with a circulation arm 3 respectively at least, and an end of circulation arm 3 is responsible for 2 with circulation and is linked to each other (generally adopt and be welded to connect), and the other end is for its outlet 302, referring to Fig. 1, Fig. 3 and Fig. 5.Circulation arm 3 levels or be tilted to down settings, and roughly perpendicular with the person in charge 2 that circulates.In general, the angle α that is become between axial line and the horizontal plane of circulation arm 3 is preferably 0 ° to 70 ° (i.e. 0 °≤α≤70 °), referring to Fig. 3.The circulation person in charge 2 both sides can be provided with a plurality of circulation arms 3 respectively, number is set is determined by the diameter of revivifier 10.The length of circulation arm 3 is determined by the diameter of revivifier 10 that also the outlet 302 of circulation arm 3 is generally 150 to 1500 millimeters apart from the distance of revivifier 10 walls, and the diameter of circulation arm 3 then depends on the diameter of inclined tube 8 to be generated.In general, total cross-sectional area of circulation arm 3 is 0.5 to 1.0 times of the circulation person in charge 2 cross-sectional areas.Divider 1 as depicted in figs. 1 and 2, its circulation person in charge 2 both sides are respectively equipped with 4 circulation arms 3.
Be respectively equipped with a plurality of wear-resisting nozzles 4 on the bottom tube wall of each arm 3 that circulates, flow out for the reclaimable catalyst in the divider 1.The material of wear-resisting nozzle 4 can be various high-abrasive materials, as wear-resistant ceramic, Wimet etc.As Fig. 3, Fig. 4 and shown in Figure 5, wear-resisting nozzle 4 is generally tubular, and methods such as one end employing welding are connected on the circulation arm 3, and the other end is outlet 402.The length of wear-resisting nozzle 4 is generally 0.2 to 2 times of circulation arm 3 diameters.Wear-resisting nozzle 4 outlets 402 are provided with downwards; Can also can be tilted to down vertically downward.In general, the angle β that become is preferably 10 ° to 90 ° between the axial line of the axial line of wear-resisting nozzle 4 and circulation arm 3, referring to Fig. 5.The diameter and the total quantity thereof of the set wear-resisting nozzle 4 of the bottom tube wall of each arm 3 that circulates (the following tube wall of arm axial line refers to respectively to circulate) then depend on the percentage of open area of reclaimable catalyst divider.The percentage of open area of reclaimable catalyst divider is the total cross-sectional area of wear-resisting nozzle 4 and the ratio (representing with percentage ratio) of the circulation person in charge 2 cross-sectional area.For the present invention, the percentage of open area of reclaimable catalyst divider can be 10% to 90%, is preferably 30% to 50%.In Fig. 3 and Fig. 4, what be provided with on the bottom tube wall of a circulation arm 3 of divider 1 is wear-resisting nozzle 4 (see figure 4)s of two rows, and every row is 4.
Operating process to reclaimable catalyst divider of the present invention describes below.With reference to Fig. 1 and Fig. 2, Fig. 3, Fig. 4 and Fig. 5, behind the stripped vapor stripping, enter revivifier 10 at the reacted reclaimable catalyst of fluidized catalytic cracker reactive moieties and regenerate by inclined tube 8 to be generated.Reclaimable catalyst is responsible for 2 through the circulation that inclined tube 8 to be generated flows into reclaimable catalyst divider 1 of the present invention, under the conveying wind and fluidisation wind action that feed by catalyst transport airduct 5 and fluidisation airduct 6, (annotate: carry wind and fluidized wind to be air), reclaimable catalyst is fluidized state and flows in the circulation person in charge 2, and the outlet 402 of a plurality of wear-resisting nozzle 4 that is provided with on the outlet 302 of arm 3 ends of respectively circulating of divider 1 and each circulation arm 3 bottom tube wall evenly flows in each quadrant of revivifiers 10 uniform distribution in the entire cross section zone of revivifier 10.Main air sparger 11 is equipped with in the bottom of revivifier 10, is used for introducing main air, shown in the arrow among Fig. 1.Reclaimable catalyst is bubbling bed fluidized state in revivifier 10, burn with the reverse uniform contact of main air; Reclaimable catalyst is able to holomorphosis in this process, fully recover its activity.After regenerated flue gas is isolated the catalyzer of carrying secretly through cyclonic separator 12, discharge outside the revivifier, shown in the arrow among Fig. 1 through flue gas collecting tubule 13.Catalyzer after the regeneration flows into riser tube through regenerator sloped tube 9, is promoting in advance under the effect of gas, contacts with stock oil and carries out catalytic cracking reaction.The condition of above-mentioned regenerative response is as described in the beneficial effect part of specification sheets of the present invention.The accompanying drawing of fluidized catalytic cracker reactive moieties and explanation are omitted.
A special case of reclaimable catalyst divider of the present invention is, circulation arm 3 is arranged at circulation vertically downward and is responsible for 2 bottom, that is the angle α that is become between the axial line that is equivalent to circulation arm 3 among Fig. 3 and the horizontal plane is 90 ° a situation.This reclaimable catalyst divider is applicable to the less revivifier of diameter (diameter is generally less than 4 meters).Referring to Fig. 6 and Fig. 7, it comprises a horizontally disposed circulation person in charge 2 equally, and circulation is responsible for an end of 2 for inlet, links to each other with the outlet of inclined tube to be generated, circulates and is responsible for 2 the other end sealing.Circulation be responsible for 2 inlet end longshore current logical be responsible for 2 be axially arranged with catalyst transport airduct 5 and fluidisation airduct 6, fluidisation airduct 6 is located at the below of carrying airduct 5.Foregoing with the circulation arm 3 levels or be tilted to down the setting divider identical, can be with reference to relevant accompanying drawing and explanation.
The divider of this structure, its circulation person in charge 2 bottom is provided with a circulation arm 3 vertically downward at least.The upper end of circulation arm 3 is responsible for 2 with circulation and is linked to each other (the general employing is welded to connect), and the lower end is outlet 302.The circulation person in charge 2 bottom can be provided with a plurality of circulation arms 3 vertically downward, number is set is determined by the diameter of revivifier equally.Each arm 3 that circulates becomes single layout (figure slightly) on the circulation person in charge 2 length direction.
Below brief description is carried out in the operating process of the reclaimable catalyst divider of this structure.With reference to Fig. 6 and Fig. 7, behind the stripped vapor stripping, flow into the circulation person in charge 2 of reclaimable catalyst divider 1 by inclined tube to be generated at the reacted reclaimable catalyst of fluidized catalytic cracker reactive moieties, under the conveying wind and fluidisation wind action that feed by catalyst transport airduct 5 and fluidisation airduct 6, reclaimable catalyst is fluidized state and flows in the circulation person in charge 2, and outlet 402 outflows of the wear-resisting nozzle 4 that on the outlet 302 of circulation arm 3 lower ends that the person in charge's 2 lower vertical that circulate are provided with downwards and the arm 3 both sides tube walls that circulate, is provided with, be distributed in the revivifier equably.The regenerative process of catalyzer and above-mentioned circulation arm level or to be tilted to down the situation of the divider that is provided with identical can be referring to relevant explanations.
Reclaimable catalyst divider of the present invention, its circulation are responsible for, carry airduct, fluidisation airduct, circulation arm and wear-resisting nozzle to be generally tubular.The diameter of various pipes and wear-resisting nozzle all refers to its internal diameter, and relevant cross-sectional area all calculates according to internal diameter.
In above embodiment, the reclaimable catalyst introduction pipe line is inclined tube to be generated.The reclaimable catalyst introduction pipe line can also adopt regeneration standpipe.When adopting regeneration standpipe, itself and structure, setting and the structural parameter etc. of being connected of being responsible for of reclaimable catalyst divider circulation, reclaimable catalyst divider and each parts thereof, the situation during all with employing inclined tube to be generated is identical.Relevant accompanying drawing and explanation are omitted.
Below structure and the operating process to reclaimable catalyst divider of the present invention has been described in detail with embodiment in conjunction with the accompanying drawings.But the drawings and specific embodiments and some cited structural parameter just are illustrated the structure and the variation thereof of reclaimable catalyst divider of the present invention, or preferred implementation of the present invention, do not limit the scope of protection of present invention.The person of ordinary skill in the field can be according to the present invention the explanation of specification sheets or the technology general knowledge in utilization present technique field, described reclaimable catalyst divider is carried out the change or the selection of aspects such as various block constructions, shape, quantity or structural parameter, to satisfy various concrete operational requirements and to obtain beneficial technical effects.
In specification sheets of the present invention, % represents weight percentage with weight, and % represents volumn concentration with volume.Among each figure of Fig. 2 to Fig. 7 of the present invention, the implication of all unaccounted Reference numerals all with Fig. 1 or other relevant accompanying drawing in identical.
Reclaimable catalyst divider of the present invention is mainly used in the revivifier of petroleum chemical industry hydrocarbon raw material fluidized catalytic cracker, so that reclaimable catalyst is allocated in the revivifier more equably.The present invention both can be used for the design of newly-built fluidized catalytic cracker revivifier, also can be used for the transformation of existing fluidized catalytic cracker revivifier.Adopt the present invention, can improve the carbon-burning capacity or the carbon-burning load of revivifier effectively, reduce the device production cost, and can improve the treatment capacity of device.
Application example:
Certain fluidized catalytic cracker is transformed (before the transformation, not establishing the reclaimable catalyst divider in the revivifier) according to the structure and the set-up mode of the present invention's reclaimable catalyst divider shown in Figure 1 to revivifier.The carbon content that comes from inclined tube to be generated is that the reclaimable catalyst of 1.2 heavy % enters the reclaimable catalyst divider, enters in the revivifier after the uniformly distributing of reclaimable catalyst divider and burns.Reclaimable catalyst is the RHZ-300 type fluidized catalytic cracking catalyst of selling on the market.The distribution process of reclaimable catalyst and regenerative process are as described in the embodiment part.Operational condition and structural parameter that some are main are as follows:
The top pressure of revivifier is 0.171MPa, and revivifier dilute catalyst phase bed tempertaure is 680 ℃ (being 695 ℃) before the transformation, and revivifier dense-phase catalyst bed tempertaure is 665 ℃ (being 675 ℃) before the transformation.The revivifier diameter is 5000 millimeters of φ.Revivifier dense catalyst bed linear gas velocity is 0.7 meter per second (being 0.8 meter per second before the transformation), and the main air amount is 44000 standard cubic meter/hour (be 52000 standard cubic meter/hour) before the transformation.The diameter that the circulation of reclaimable catalyst divider is responsible for is 740 millimeters of φ, and the length in revivifier is 4000 millimeters.Carry airduct to be provided with one, diameter is 200 millimeters of φ, carry air quantity be 6500 standard cubic meter/hour.The fluidisation airduct is provided with 2, and diameter is 150 millimeters of φ, and percentage of open area is 0.1%, total fluidisation air quantity be 1500 standard cubic meter/hour.Carry wind and fluidized wind to be air.The both sides that circulation is responsible for are respectively equipped with 4 circulation arms, and the circulation arm has 8.The diameter that circulate among is responsible for every side intermediary 2 circulations arm (totally 4) is 300 millimeters of φ, and the diameter of 2 circulation arms (totally 4) at two ends is 200 millimeters of φ.The downward-sloping angle of each arm that circulates (that is the angle α that is become between the axial line of the arm that respectively circulates and the horizontal plane) is 30 °.The outlet of each arm that circulates is 400 millimeters apart from the distance of revivifier wall.Two row's wear-resisting nozzles (with reference to Fig. 4) all are set, the pitch arrangement of each wear-resisting nozzle of the wear-resisting nozzle of every row on the bottom tube wall of each arm that circulates to equate.Set wear-resisting nozzle is the tubular ceramic nozzle that diameter is 30 millimeters of φ, and total quantity is 300.
Catalyzer carbon content after the regeneration is 0.02 heavy %.And before the revivifier transformation, the catalyzer carbon content after the regeneration is 0.07 heavy %.
Claims (7)
1, a kind of fluidized catalytic cracker reclaimable catalyst divider, comprise a horizontally disposed circulation person in charge (2), the end that (2) are responsible in circulation is inlet (201), link to each other with the outlet of reclaimable catalyst introduction pipe line (8), it is characterized in that: circulation be responsible for inlet (201) the end longshore current of (2) logical be responsible for (2) be axially arranged with catalyst transport airduct (5) and fluidisation airduct (6), fluidisation airduct (6) is located at the below of carrying airduct (5), the both sides that (2) are responsible in circulation are provided with a circulation arm (3) respectively at least, one end of circulation arm (3) is responsible for (2) with circulation and is linked to each other, the other end is outlet (302), circulation arm (3) level or be tilted to down setting, the bottom tube wall of circulation arm (3) is provided with wear-resisting nozzle (4), and wear-resisting nozzle (4) outlet (402) is provided with downwards.
2, reclaimable catalyst divider according to claim 1 is characterized in that: the angle α that is become between axial line and the horizontal plane of circulation arm (3) is 0 ° to 70 °.
3, reclaimable catalyst divider according to claim 1 and 2 is characterized in that: the percentage of open area of reclaimable catalyst divider is 10% to 90%.
4, reclaimable catalyst divider according to claim 3 is characterized in that: the percentage of open area of reclaimable catalyst divider is 30% to 50%.
5, a kind of fluidized catalytic cracker reclaimable catalyst divider, comprise a horizontally disposed circulation person in charge (2), the end that (2) are responsible in circulation is inlet, link to each other with the outlet of reclaimable catalyst introduction pipe line, it is characterized in that: circulation be responsible for the inlet end longshore current of (2) logical be responsible for (2) be axially arranged with catalyst transport airduct (5) and fluidisation airduct (6), fluidisation airduct (6) is located at the below of carrying airduct (5), the bottom that (2) are responsible in circulation is provided with a circulation arm (3) vertically downward at least, the upper end of circulation arm (3) is responsible for (2) with circulation and is linked to each other, the lower end is outlet (302), circulation arm (3) is provided with wear-resisting nozzle (4) on the both sides tube wall relative with the vertical plane of being responsible for (2) axial line by circulation, wear-resisting nozzle (4) outlet (402) is tilted to down setting.
6, reclaimable catalyst divider according to claim 5 is characterized in that: the percentage of open area of reclaimable catalyst divider is 10% to 90%.
7, reclaimable catalyst divider according to claim 6 is characterized in that: the percentage of open area of reclaimable catalyst divider is 30% to 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126336 CN1208433C (en) | 2003-09-02 | 2003-09-02 | Distributor of catalyzer to be generated in fluid catalytic cracking unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126336 CN1208433C (en) | 2003-09-02 | 2003-09-02 | Distributor of catalyzer to be generated in fluid catalytic cracking unit |
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| CN1519296A true CN1519296A (en) | 2004-08-11 |
| CN1208433C CN1208433C (en) | 2005-06-29 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1967259A1 (en) | 2007-03-09 | 2008-09-10 | Stone & Webster Process Technology, Inc. | Improved bathtube-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units |
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| US8349753B2 (en) | 2007-03-09 | 2013-01-08 | Stone & Webster Process Technology, Inc. | Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units |
| JP2008221210A (en) * | 2007-03-09 | 2008-09-25 | Stone & Webster Process Technology Inc | Improved bathtub-type spent catalyst distributor for effective countercurrent regeneration in fluid catalytic cracking equipment |
| US7745365B2 (en) | 2007-03-09 | 2010-06-29 | Stone & Webster Process Technology, Inc. | Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units |
| EP1967259A1 (en) | 2007-03-09 | 2008-09-10 | Stone & Webster Process Technology, Inc. | Improved bathtube-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units |
| US7951739B2 (en) | 2007-03-09 | 2011-05-31 | Stone & Webster Process Technology, Inc. | Bathtub-type spent catalyst distributor for effective counter-current regeneration in fluid catalytic cracking units |
| US7947230B2 (en) | 2008-12-16 | 2011-05-24 | Uop Llc | Apparatus for regenerating catalyst |
| US8173567B2 (en) | 2008-12-16 | 2012-05-08 | Uop Llc | Process for regenerating catalyst |
| CN101992157B (en) * | 2010-11-29 | 2013-06-26 | 中国石油大学(北京) | Float type nozzle |
| CN101992157A (en) * | 2010-11-29 | 2011-03-30 | 中国石油大学(北京) | Float type nozzle |
| CN106904380A (en) * | 2015-12-23 | 2017-06-30 | 沈阳铝镁设计研究院有限公司 | A kind of double-layer fluidized gravity mixing bunker |
| CN105419843A (en) * | 2015-12-29 | 2016-03-23 | 北京神雾环境能源科技集团股份有限公司 | Moving bed catalysis rapid pyrolysis reactor |
| CN105419843B (en) * | 2015-12-29 | 2017-05-31 | 北京神雾环境能源科技集团股份有限公司 | Moving bed is catalyzed fast pyrolysis reactor |
| CN105586449A (en) * | 2016-03-11 | 2016-05-18 | 山东钢铁股份有限公司 | Pulverized coal fluidizing and injection device for blast furnace |
| CN107628986A (en) * | 2017-10-20 | 2018-01-26 | 山东明化新材料有限公司 | A kind of catalyst uniform device of pyridine production |
| CN107628986B (en) * | 2017-10-20 | 2021-07-13 | 山东明化新材料有限公司 | Catalyst uniform distributor for pyridine production |
| CN108913194A (en) * | 2018-06-12 | 2018-11-30 | 中国石油大学(北京) | A kind of old catalyst distrbutor |
| CN108913194B (en) * | 2018-06-12 | 2019-10-11 | 中国石油大学(北京) | A kind of old catalyst distrbutor |
| CN112439363A (en) * | 2019-09-05 | 2021-03-05 | 中石油吉林化工工程有限公司 | Propylene ammonia distributor |
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