CN101191067A - Regenerated catalyst thermoregulation device for catalytic cracking equipment - Google Patents
Regenerated catalyst thermoregulation device for catalytic cracking equipment Download PDFInfo
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- CN101191067A CN101191067A CNA2007100547386A CN200710054738A CN101191067A CN 101191067 A CN101191067 A CN 101191067A CN A2007100547386 A CNA2007100547386 A CN A2007100547386A CN 200710054738 A CN200710054738 A CN 200710054738A CN 101191067 A CN101191067 A CN 101191067A
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Abstract
The invention discloses renewable catalyst temperature adjustment equipment for a catalytic cracker and aims to solve the problems that the catalyst-to-oil ratio of the prior catalytic cracker fails to be flexibly improved according to the actual requirement, or the catalyst-to-oil ratio can be adjusted, but has a complex structure. The invention is characterized in that: a catalyst cooler is arranged beside a regenerator dense phase bed, the regenerator dense phase bed is communicated with the catalyst cooler through a catalyst extraction outlet arranged on the side wall of the regenerator dense phase bed, a heat removing tube is arranged in the catalyst cooler, fluidized rings are sectionally arranged along the vertical height of the catalyst cooler,the upper part of the catalyst cooler is provided with a fume return device, and the fume return device is provided with a throttling device. The invention can ensure that the catalyst-to-oil ratio is flexibly improved during the catalytic cracking reaction.
Description
Technical field
The invention belongs to the hydrocarbon oil catalytic cracking field, relate to a kind of regenerated catalyst thermoregulation equipment of catalytic cracking unit.
Background technology
In the reaction process of oil refining enterprise FCC riser, the agent-oil ratio of reaction (participating in the mass ratio of catalyst for reaction and reaction feed oil) is an important parameter that is related to reaction conversion ratio and reaction preference.Bigger and rational agent-oil ratio means the increase of the absolute quantity of the catalyst active center that participates in the cracking reaction process, also mean simultaneously the raising of entire reaction course catalyzer average activity, improve the selectivity that reaction process catalyzer average activity can improve the transformation efficiency of catalytic cracking reaction and optimize reaction, increase the productive rate of purpose product, for enterprise creates better economic benefit.
The size (size of reagent oil ratio) that participates in the catalyst for reaction amount is by temperature head decision before and after total heat requirement of reaction and the catalyst reaction, so the variation of catalyst reaction front and back temperature head can have influence on the agent-oil ratio of reaction.But the reaction terminating temperature is that temperature is that reducing regeneration temperature will influence regeneration efficiency, and reaction is lost more than gain by the regeneration temperature decision of revivifier before the catalyst reaction by the decision of the technology of products scheme or employing.Various revivifier structures, regeneration temperature and regeneration efficiency are a pair of contradiction, burn efficient for guaranteeing regeneration, and it is too low that catalyst regeneration temperature can't be fallen, thus present catalytic cracking, can't be by reducing the raising of regenerated catalyst temperature realization response agent-oil ratio.
The method that improves the reagent oil ratio at present commonly used is by injecting liquid phase quenching medium (as: quenching oil or water) in reactor, and the gasification by quenching medium increases the total heat requirement of reaction, thereby improves the agent-oil ratio of reaction.But the increase that quenching oil can cause plant energy consumption and working cost is injected in employing, is not best regulating measure so improve the agent-oil ratio that reacts by the method that increases the total heat requirement of reaction.
Chinese patent 99120517 discloses a kind of warming method for pipeline of heavy oil catalytic cracking regenerating agent, is heat-obtaining facility, the direct dereaction device of cooled regenerator are installed on the regenerator transfer line.Chinese patent 99120529 discloses a kind of catalyst cooling method for regenerating agnet conveying pipeline, and its method is that chilled low-temp recovery agent is mixed in existing inclined tube or riser tube pre lift zone with high temperature regeneration agent from revivifier.This two method can balanced reaction device and revivifier superfluous heat, creates " three height " operational condition of a kind of high regeneration temperature high solvent-oil ratio, high raw material preheating temperature, can improve the intermingled dregs ratio of device, improves transformation efficiency and light oil yield, improves product and distributes.But patent 99120517 disclosed online catalyst coolers, its heat-obtaining ability relative fixed is difficult for regulating, if the heavier and difficult gasification of catalysis charging, the charging gasification section needs higher regenerator temperature, this technology must improve revivifier and burn temperature and realize, its result will make the heat of regenerated catalyst collapse and the heat inactivation aggravation, cause catalyst consumption to increase; If do not improve the regenerator temperature of gasification section, will cause charging gasification weak effect, the dry gas of reaction and coke yield rise, and the purpose product yield descends.Therefore the heat-obtaining Load Regulation of its online catalyst cooler elasticity own is relatively poor, if obtain the reasonably cold back of regenerated catalyst temperature, needs to regulate revivifier and burns parameters such as temperature, so its this parameter of reagent oil ratio can not really become autonomous variable.The difference of reaction-regeneration two device structure formations in the patent 99120529, this structure differ and guarantee that surely the cooled catalyst of extracting out is the catalyzer after the regeneration; Its complex structure needs a large amount of high-pressure delivery wind in addition, and the main air utilization ratio reduces, and power consumption and working cost are higher.
Summary of the invention
The present invention be directed to existing catalytic cracking unit agent-oil ratio can't require to improve flexibly according to reality, or agent-oil ratio can be regulated but has baroque problem, and a kind of new regenerated catalyst thermoregulation device for catalytic cracking equipment has been proposed, this device can make the agent-oil ratio in the catalytic cracking reaction process realize improving neatly in the certain limit.
Technical scheme of the present invention is: a kind of regenerated catalyst thermoregulation equipment of catalytic cracking unit, comprise revivifier dense bed and riser reactor conversion zone, it is characterized in that: the cooling catalyst device is set on the next door of revivifier dense bed, the sidewall of revivifier dense bed is provided with catalyzer and extracts mouth out, the revivifier dense bed is extracted mouth out by catalyzer and is connected with the cooling catalyst device, be provided with heat removing tube in the cooling catalyst device, along the segmentation of cooling catalyst device vertical height the fluidisation ring is set, cooling catalyst device top is provided with the flue gas return mechanism, the flue gas return mechanism is provided with throttling set, riser reactor conversion zone middle part is provided with feed nozzle, the bottom is provided with pre-lifter, and pre-lifter is connected with the cooling catalyst device by catalyst transport and regeneration guiding valve.
The present invention compared with prior art, its effect is: at first, the catalyzer that advances reactor all is the good catalyzer of regeneration, reactive behavior height, and active consistent and uniform are for the stable and optimization of reaction provides precondition; The second, the present invention can make the catalyst fluidized bed segmentation expand, thereby regulate heat transfer coefficient and heat-obtaining amount because employing is provided with the fluidisation ring along the segmentation of cooling catalyst device vertical height, makes heat transfer coefficient also become an important parameter regulating the heat-obtaining load; Regulate the fluidisation air quantity of the fluidisation ring that is provided with by segmentation simultaneously, regulate the expansion height of catalyst fluidized bed, thereby regulate the height that floods of heat removing tube, change the heat-obtaining area of cooler, the sensitivity that makes the overall adjustment scope of heat collector (district) broaden, regulate improves, and then realize regenerated catalyst before the good reaction of regenerating is carried out the temperature regulating and controlling, thereby the flexible raising of realization response process agent-oil ratio.
Below in conjunction with the drawings and specific embodiments technical solution of the present invention is elaborated, but the drawings and specific embodiments not delimit the scope of the invention.
Description of drawings
Figure is a kind of simple graph of regenerated catalyst thermoregulation device for catalytic cracking equipment of the present invention.
Among the figure: 1-revivifier dense bed, the 4-catalyzer is extracted mouth out, the 5-heat removing tube,
6-fluidisation ring, 7-cooling catalyst device, the 8-regenerated catalyst,
The 9-guiding valve of regenerating, the pre-lifter of 10-, the 11-feed nozzle,
12-riser reactor conversion zone, 13-throttling set, 14-flue gas return mechanism.
Embodiment
As shown in the figure, regenerated catalyst thermoregulation device for catalytic cracking equipment of the present invention, comprise revivifier dense bed 1 and riser reactor conversion zone 12, on the next door of revivifier dense bed 1 cooling catalyst device 7 is set, the sidewall of revivifier dense bed 1 is provided with catalyzer and extracts mouth 4 out, revivifier dense bed 1 is extracted mouthfuls 4 out by catalyzer and is connected with cooling catalyst device 7, be provided with heat removing tube 5 in the cooling catalyst device 7, vertical height segmentation along cooling catalyst device 7 is provided with fluidisation ring 6, cooling catalyst device 7 tops are provided with flue gas return mechanism 14, flue gas return mechanism 14 is provided with throttling set 13, riser reactor conversion zone 12 middle parts are provided with feed nozzle 11, the bottom is provided with pre-lifter 10, and pre-lifter 10 is connected with cooling catalyst device 7 by regenerated catalyst 8 and regeneration guiding valve 9.
The main operating process of the regenerated catalyst thermoregulation device for catalytic cracking equipment shown in the employing figure is: the catalyzer that regeneration is good is extracted mouthful 4 extractions out by the catalyzer of revivifier dense bed 1 sidewall, enter in the cooling catalyst device 7, establish heat removing tube 5 in the cooler, by regulating the air quantity and the throttling set 13 of the fluidized wind that enters by fluidisation ring 6 in the cooling catalyst device 7, regulate the height and the heat transfer coefficient of cooling catalyst device 7 inner catalyst beds, regulate the heat-obtaining amount, catalyst temperature is reduced to 630～660 ℃ after regenerated catalyst 8 and regeneration guiding valve 9 advance the pre-lifter 10 of riser reactor conversion zone 12 bottoms, under the effect of pre-lifter 10, enter riser reactor conversion zone 12, with the charging hybrid reaction that enters by feed nozzle 11.Temperature of reaction is controlled automatically by regeneration guiding valve 9.The oxygen enrichment flue gas returns revivifier dense bed 1 by flue gas return mechanism 14 and the throttling set 13 that is arranged on cooling catalyst device 7 tops, and is distributed in revivifier dense bed 1 inside, improves the utilization ratio of oxygen in the flue gas.The device of this flexible rising agent oil ratio is adapted to the dense-phase bed carbon-burning capacity does not especially have surplus, and the revivifier bottom does not have the situation of arrangement space.
Claims (1)
1. the regenerated catalyst thermoregulation equipment of a catalytic cracking unit, comprise revivifier dense bed and riser reactor conversion zone, it is characterized in that: the cooling catalyst device is set on the next door of revivifier dense bed, the sidewall of revivifier dense bed is provided with catalyzer and extracts mouth out, the revivifier dense bed is extracted mouth out by catalyzer and is connected with the cooling catalyst device, be provided with heat removing tube in the cooling catalyst device, along the segmentation of cooling catalyst device vertical height the fluidisation ring is set, cooling catalyst device top is provided with the flue gas return mechanism, the flue gas return mechanism is provided with throttling set, riser reactor conversion zone middle part is provided with feed nozzle, the bottom is provided with pre-lifter, and pre-lifter is connected with the cooling catalyst device by catalyst transport and regeneration guiding valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100547386A CN101191067A (en) | 2007-07-09 | 2007-07-09 | Regenerated catalyst thermoregulation device for catalytic cracking equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100547386A CN101191067A (en) | 2007-07-09 | 2007-07-09 | Regenerated catalyst thermoregulation device for catalytic cracking equipment |
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| Publication Number | Publication Date |
|---|---|
| CN101191067A true CN101191067A (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2007100547386A Pending CN101191067A (en) | 2007-07-09 | 2007-07-09 | Regenerated catalyst thermoregulation device for catalytic cracking equipment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993713A (en) * | 2009-08-13 | 2011-03-30 | 中国石油化工集团公司 | Method for controlling upper-middle temperature of catalytic cracking raising pipe |
| US9428698B2 (en) | 2012-11-07 | 2016-08-30 | Baozhen Shi | Method and apparatus for controlling catalyst in reaction zones and purifying and cooling regenerated catalyst |
| US10465125B2 (en) | 2014-10-09 | 2019-11-05 | Baozhen Shi | Regeneration method for catalytic cracking reaction |
| CN111655363A (en) * | 2017-12-21 | 2020-09-11 | 环球油品有限责任公司 | Method and apparatus for fluidizing a catalyst bed |
-
2007
- 2007-07-09 CN CNA2007100547386A patent/CN101191067A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993713A (en) * | 2009-08-13 | 2011-03-30 | 中国石油化工集团公司 | Method for controlling upper-middle temperature of catalytic cracking raising pipe |
| CN101993713B (en) * | 2009-08-13 | 2013-12-25 | 中国石油化工集团公司 | Method for controlling upper-middle temperature of catalytic cracking raising pipe |
| US9428698B2 (en) | 2012-11-07 | 2016-08-30 | Baozhen Shi | Method and apparatus for controlling catalyst in reaction zones and purifying and cooling regenerated catalyst |
| US10465125B2 (en) | 2014-10-09 | 2019-11-05 | Baozhen Shi | Regeneration method for catalytic cracking reaction |
| CN111655363A (en) * | 2017-12-21 | 2020-09-11 | 环球油品有限责任公司 | Method and apparatus for fluidizing a catalyst bed |
| CN111655363B (en) * | 2017-12-21 | 2022-07-22 | 环球油品有限责任公司 | Method and apparatus for fluidizing a catalyst bed |
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Open date: 20080604 |