CN204469710U - The regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent - Google Patents
The regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent Download PDFInfo
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- CN204469710U CN204469710U CN201520058020.4U CN201520058020U CN204469710U CN 204469710 U CN204469710 U CN 204469710U CN 201520058020 U CN201520058020 U CN 201520058020U CN 204469710 U CN204469710 U CN 204469710U
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Abstract
The utility model discloses the regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent, it is characterized in that, described regenerative system comprises the first regenerator (1) and the Second reactivator (2) of block form layout; The reclaimable catalyst entrance on described first regenerator (1) top is communicated with the inclined tube to be generated (38) for the reclaimable catalyst outlet with organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system, and the regenerated catalyst outlet at described Second reactivator (2) middle part is communicated with the regenerator sloped tube (9) for being communicated with the regenerated catalyst inlet of described organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system; The semi regeneration catalyst outlet of described first regenerator (1) bottom is communicated with by semi regeneration inclined tube (25) with the semi regeneration catalyst inlet of described Second reactivator (2) bottom.The regenerative system of organic oxygen compound catalytic cracking arenes catalytic of the present utility model agent is compared with existing regenerative system, not only safer, and catalyst hydrothermal deactivation is all lower with race loss rate.
Description
Technical field
The utility model relates to the regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent.
Background technology
Aromatic hydrocarbons is a kind of important organic chemical industry's basic material, wherein benzene, toluene and dimethylbenzene (comprising ortho-xylene, meta-xylene and paraxylene) purposes are very extensive, and its end product is for the synthesis of resin, synthetic fibers, synthetic rubber, coating, dyestuff and medicine and other fields.Along with China's socio-economic development, also growing to the demand of aromatic hydrocarbons, the consumption of the annual aromatic hydrocarbons of current China more than 2,000 ten thousand tons, but has half need from external import.
Benzene, toluene and dimethylbenzene are mainly derived from petrochemical industry, the aromatic hydrocarbons that domestic petroleum chemical industry route is produced accounts for aromatics production total amount more than 85%, production technology mainly comprises: Naphtha reformation, the extracting of cracking of ethylene petroleum naphtha hydrogenation and low-carbon (LC) aromatization of hydrocarbons etc., wherein Naphtha reformed arene output accounts for 80% of petrochemical industry route aromatic production, and cracking of ethylene petroleum naphtha hydrogenation extracting aromatic production accounts for 16%.Along with the exhaustion day by day of petroleum resources, crude oil price remains high, and brings larger cost pressure to petrochemical industry route preparing aromatic hydrocarbon.The Energy Situation of China is the few oily deficency of many coals, with economic sustainable growth since the nineties in 20th century, China's external oil dependency degree constantly increases, 1993 to 1996, China's external oil dependency degree, substantially within 10%, by 2000 first more than 30%, reaches 50.5% in 2007, within 2013, reach 57.39%, far exceed 30% warning line of generally acknowledging in the world.Then, rich coal resources in China, in recent years under national policy is supported, the industries such as ammonia from coal, dimethyl ether and ethylene glycol develop rapidly, according to statistics nearly 2,900 ten thousand tons of China's methanol output in 2013.Therefore, development organic oxygen compound catalytic cracking aromatic hydrocarbons technology, to substitute traditional petrochemical industry route, can reduce the dependency degree of aromatic hydrocarbons to petroleum, have important effect to Chinese energy safety and aromatics production industry.
Utilize the technology of organic oxygen compound catalytic cracking aromatic hydrocarbons, proposed the earliest by Mobil Oil Corporation of the U.S., the patent US4156698 A of application in its 1979 discloses and utilizes the composite catalyst containing molecular sieve by C
1-C
4alcohols or ether compound are converted into the method for low-carbon alkene and aromatic hydrocarbons; Disclosing in the patent US4590321 A of application in 1985 utilizes ZSM-5 or ZSM-11 equimolecular sieve catalyst by C
2-C
12alkane, C
2-C
12alkene, C
1-C
5alcohols and C
2-C
12the non-aromatics converting compounds such as ethers are the technique of aromatic hydrocarbons; US Patent No. 4686312 A, US4724270 A, US4822939 A, US4822939 A and US4049573 A etc. also discloses the method for methyl alcohol or dimethyl ether aromatic hydrocarbons under different catalysts effect.But the emphasis of these United States Patent (USP)s is mainly that Study of Catalyst composition and operation condition are on aromatics conversion rate with optionally affect, indivedual patent proposes the reaction process of methyl alcohol or dimethyl ether aromatic hydrocarbons, but does not all clearly propose the reaction-regeneration system of organic oxygen compound aromatic hydrocarbons technology, reaction regeneration method and reactor and regenerator pattern.
At present, domestic Ye Youduojia institute researches and develops organic oxygen compound aromatic hydrocarbons technology, mainly comprises Tsing-Hua University, Shanxi Inst. of Coal Chemistry, Chinese Academy of Sciences, Sinopec Shanghai Petroleum Chemical Engineering Institute and Dalian Inst of Chemicophysics, Chinese Academy of Sciences etc.It is the technique of raw material aromatic hydrocarbons processed under ZSM-5 Type Zeolites agent effect that Chinese patent CN 1880288A discloses with methyl alcohol, this patent isolates low-carbon (LC) hydro carbons and liquid product after being cooled by first stage reactor aromatization of methanol gas-phase product, liquid product obtains aromatic hydrocarbons and non-aromatics through extract and separate, low-carbon (LC) hydro carbons enters the further aromatisation of second stage reactor, thus improves the overall selectivity of aromatic hydrocarbons.Chinese patent CN 101823929 B proposes system and the technique of a kind of methyl alcohol or dimethyl ether preparing aromatic hydrocarbon, and methyl alcohol or dimethyl ether first react at aromatization reactor, hydrogen, methane, mixed C in product
8aromatic hydrocarbons and part C
9+hydro carbons as product, C
2+non-aromatics and except mixed C
8aromatic hydrocarbons and part C
9+aromatic hydrocarbons outside hydro carbons then can be recycled to another reactor and carry out further aromatisation, improves the yield of aromatic hydrocarbons and selective.Chinese patent CN 101607858 B, CN 102190546B, CN 102371176 B and CN 102371177 B etc. also individually disclose organic oxygen compound catalytic cracking aromatics process and the arenes catalytic agent of organic oxygen compound catalytic cracking and preparation method.Above-mentioned patent focus on equally investigate different catalysts composition and rare metal, the rare-earth metal modified impact on aromatization process, CN 1880288A and CN 101823929 B mainly proposes product circulation aromatisation to the impact of aromatics yield, but these patents do not relate to the reaction-regeneration system of organic oxygen compound aromatic hydrocarbons yet.
Chinese patent CN 101244969 A discloses the devices and methods therefor of a kind of continuous aromatization and catalyst regeneration, this device comprises the fluid bed of an aromatisation fluid bed and a continuous catalyst regenerating and the pipeline for catalyst transport be arranged between two fluid beds and solids delivery device, but this patent does not propose the concrete form of regenerative system, and there are some problems: regenerator only establishes one-level gas solid separation system, catalyst recovery yield is low, causes expensive catalyst stack less serious; Regenerator pattern is the regeneration of single hop bed, and for ensureing catalyst regeneration efficiency, regeneration temperature reaches as high as 750 DEG C, owing to containing part hydrogen in the coke of catalyst entrainment, generate water after burning, under high temperature and water vapor acting, catalyst hydrothermal deactivation is serious, causes catalyst activity to reduce; Regenerator heat-obtaining mode is interior heat-obtaining, and only arranges a heat production coil pipe, and when coil pipe bursts, heat-obtaining medium scurries into regenerator in a large number, regenerator pressure can be caused to raise rapidly, even can set off an explosion time serious.
Utility model content
The purpose of this utility model is to provide the regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent, this regenerative system overcomes the problem of existing organic oxygen compound catalytic cracking arenes catalytic agent regenerative system, the inactivation of catalyst can be reduced on the one hand, the race reducing catalyst is damaged, and greatly can also increase the security of regenerative system on the other hand.
To achieve these goals, the utility model provides the regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent, it is characterized in that, described regenerative system comprises the first regenerator 1 and the Second reactivator 2 of block form layout; The reclaimable catalyst entrance on described first regenerator 1 top is communicated with the inclined tube to be generated 38 for the reclaimable catalyst outlet with organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system, and the regenerated catalyst outlet in the middle part of described Second reactivator 2 is communicated with the regenerator sloped tube 9 for being communicated with the regenerated catalyst inlet of described organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system; Semi regeneration catalyst outlet bottom described first regenerator 1 is communicated with by semi regeneration inclined tube 25 with the semi regeneration catalyst inlet bottom described Second reactivator 2.
Preferably, it is characterized in that, the top of described first regenerator 1 and described Second reactivator 2 is all set to dilute-phase leanphase fluidized bed section, and bottom is all set to dense bed section; Described inclined tube to be generated 38 is positioned at the bottom of the dilute-phase leanphase fluidized bed section of described first regenerator or the top of dense bed section, and described regenerator sloped tube 9 is positioned at the top of the dense bed section of described Second reactivator.
Preferably, it is characterized in that, the outer setting of described first regenerator 1 has the first auxiliary combustion chamber 6 of the regeneration oxygen-containing gas sending into described first regenerator 1 for preheating, and/or the outer setting of Second reactivator 2 has the second auxiliary combustion chamber 7 sending into the regeneration oxygen-containing gas of described Second reactivator 2 for preheating.
Preferably, it is characterized in that, bottom in described first regenerator 1 cavity is provided with the oxygen-containing gas distribution rings 10 for being uniformly distributed the regeneration oxygen-containing gas sending into described first regenerator 1, and/or the bottom in Second reactivator 2 cavity is provided with the oxygen-containing gas distributor pipe 8 for being uniformly distributed the regeneration oxygen-containing gas sending into described Second reactivator 2.
Preferably, it is characterized in that, be provided with primary cyclone again and again 11 and the secondary cyclone 12 again and again of at least one group of series winding in the dilute-phase leanphase fluidized bed section of described first regenerator 1, in the dilute-phase leanphase fluidized bed section of described Second reactivator 2, be provided with at least one group of two primary cyclone 28 and two secondary cyclones 29 more again of contacting.
Preferably, it is characterized in that, the top of the dense bed section of described first regenerator 1 is communicated with by the catalyst inlet of inclined tube on external warmer 21 with external warmer 4; The catalyst outlet of described external warmer 4 is communicated with described semi regeneration inclined tube 25 by external warmer lower oblique tube 23, or is communicated with the top of external warmer catalyst riser 39 with the dense bed section of described first regenerator 1 by external warmer lower oblique tube 23 successively.
Preferably, it is characterized in that, the bottom of described external warmer 4 is provided with the fluidizing agent distributor pipe 22 for being uniformly distributed the fluidizing agent sending into described external warmer 4, described external warmer lower oblique tube 23 is provided with guiding valve 24 under the external warmer of the discharge for controlling heat-obtaining rear catalyst.
Preferably, it is characterized in that, semi regeneration catalyst outlet bottom described first regenerator 1 is communicated with the semi regeneration catalyst inlet bottom described Second reactivator 2 with semi regeneration riser 27 by semi regeneration inclined tube 25 successively, described semi regeneration inclined tube 25 is provided with the semi regeneration guiding valve 26 for controlling described first regenerator 1 catalyst material level.
Preferably, it is characterized in that, the exhanst gas outlet at described first regenerator 1 top is communicated with mixed combustion flue 3 by flue 20 again and again, the exhanst gas outlet at described Second reactivator 2 top by two again flue 37 be communicated with described mixed combustion flue 3.
Preferably, it is characterized in that, the combustion product gases outlet of described mixed combustion flue 3 is communicated with smoke duster 5.
The regenerative system tool of the organic oxygen compound catalytic cracking arenes catalytic agent that the utility model provides has the following advantages:
1, the requirement of organic oxygen compound catalytic cracking arenes catalytic agent regeneration can be met, ensure the regenerated catalyst phosphorus content needed for reaction and activity, be suitable for the industrialization continuous seepage of organic oxygen compound catalytic cracking aromatic hydrocarbons;
2, regenerative system of the present utility model comprises the first regenerator and Second reactivator, the regeneration under low temperature oxygen deprivation operation of first regenerator, most hydrogen in catalyst can be removed, reduce the high-temperature water heat inactivation of catalyst, Second reactivator regenerates under high-temperature oxygen-enriched operation, carbon remaining in catalyst can be removed, ensure the activity of catalyst, can reduce simultaneously and burn by oxygen-containing gas consumption and oxygen-containing gas compressor wasted work;
3, the utility model is arranged in juxtaposition two regenerators, has more flexibility to the Scheme Choice of maximization, large device;
4, two regenerators all arrange at least one group of two stage cyclone separator, arrange fume dust remover simultaneously, and the catalyst that can carry secretly in recovered flue gas expeditiously, reduces the loss of catalyst, and reduce the environmental pollution that fume emission brings;
5, compared to interior heat collector, the external warmer that the utility model is arranged, catalyst can not only be taken away and burn liberated heat, control the first regenerator and Second reactivator temperature in optimum range, guarantee to burn effect, reduce the hydrothermal deactivation of catalyst, but also greatly can increase the security of regenerative system.
Other feature and advantage of the present utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is a kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model;
Fig. 2 is the another kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model;
Fig. 3 is further a kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model.
Description of reference numerals
1 first regenerator, 2 Second reactivators, 3 mixed combustion flues, 4 external warmers, 5 smoke duster 6 first auxiliary combustion chambers, 7 second auxiliary combustion chambers, 8 oxygen-containing gas distributor pipes, , 9 regenerator sloped tube 10 oxygen-containing gas distribution rings, 11 primary cyclones again and again, 12 secondary cyclone 13 draft tube again and again again and again, , 14 primary diplegs again and again, , 15 one-level flutter valve 16 secondary riseies again and again again and again, , 17 secondary diplegs again and again, , 18 secondary flutter valve 19 collection chambers again and again again and again, 20 flues again and again, inclined tube on 21 external warmers, 22 fluidizing agent distributor pipe 23 external warmer lower oblique tubes, , guiding valve under 24 external warmers, , 25 semi regeneration inclined tube 26 semi regeneration guiding valves, , 27 semi regeneration risers, , 28 2 primary cyclone 29 2 secondary cyclones more again, , 30 2 draft tube again, 31 2 primary dipleg 32 2 one-level flutter valves more again, , 33 2 secondary riseies again, , 34 2 secondary dipleg 35 2 secondary flutter valves more again, , 36 2 collection chambers again, , 37 2 flues again, 38 inclined tube 39 external warmer catalyst riser to be generated
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
The utility model provides the regenerative system of a kind of organic oxygen compound catalytic cracking arenes catalytic agent, it is characterized in that, described regenerative system comprises the first regenerator 1 and the Second reactivator 2 of block form setting; The reclaimable catalyst entrance on described first regenerator 1 top is communicated with the inclined tube to be generated 38 for the reclaimable catalyst outlet with organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system, and the regenerated catalyst outlet in the middle part of described Second reactivator 2 is communicated with the regenerator sloped tube 9 for being communicated with the regenerated catalyst inlet of described organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system; Semi regeneration catalyst outlet bottom described first regenerator 1 is communicated with by semi regeneration inclined tube 25 with the semi regeneration catalyst inlet bottom described Second reactivator 2.
According to the utility model, described organic oxygen compound is well known to those skilled in the art, can for being selected from C
1-C
10alcohols, C
2-C
12ethers and C
3-C
12at least one in ketone; The agent of described organic oxygen compound catalytic cracking arenes catalytic is also well known to those skilled in the art, can for the microspherical catalyst containing molecular sieve and carrier, and described molecular sieve is preferably ZSM-5 molecular sieve.
Inventor of the present utility model finds, organic oxygen compound catalytic cracking arenes catalytic agent hydrothermal deactivation when high temperature and high steam partial pressure is comparatively obvious, therefore the utility model is arranged in juxtaposition two regenerators and carries out two-stage regeneration to reclaimable catalyst, to reduce the high-temperature water heat inactivation of catalyst.Namely described first regenerator 1 can operate for the oxygen deprivation of employing first oxygen-containing gas, regeneration temperature can be 500-650 DEG C, and the burning velocity due to Hydrogen In The Coke is far longer than the burning velocity of carbon, under the regeneration condition that reclaimable catalyst comparatively relaxes at the first regenerator, the carbon of the heavy % of 50 heavy %-90 in coke and the protium of the heavy % of 60 heavy %-100 can be burnt, by volume, the first regenerator 1 produce the ratio of carbon monoxide and carbon dioxide in flue gas can for 0.2-3.Although most of protium can be burnt in the first regenerator 1 become water vapour, lower owing to burning temperature, the hydrothermal deactivation of catalyst can be effectively reduced.Second reactivator 2 can operate for the oxygen enrichment of employing second oxygen-containing gas, regeneration temperature can be 600-750 DEG C, regeneration condition is harsher than the first regenerator 1, because the basic burning in the first regenerator 1 of Hydrogen In The Coke element is complete, the protium of the carbon of the heavy % of 10 heavy %-50 on catalyst and the heavy % of 0 heavy %-40 can burn completely by Second reactivator 2 under the condition of the low steam partial pressure of high temperature, to reduce the hydrothermal deactivation of catalyst, by volume, Second reactivator 2 produce the content of oxygen in flue gas can for 0.5-15 body %.After described reclaimable catalyst carries out the second regeneration, by weight and with the gross weight of catalyst for benchmark, in regenerated catalyst, the content of coke can be the heavy % of 0.01-0.1.Certainly, those skilled in the art also can adopt other renovation process to regenerate the agent of organic oxygen compound catalytic cracking arenes catalytic according to actual conditions in regenerative system of the present utility model, and the utility model does not limit.
According to the utility model, the top of described first regenerator 1 and described Second reactivator 2 all can be set to dilute-phase leanphase fluidized bed section, bottom all can be set to dense bed section, in order to the catalyst inventory that increases in regenerator and facilitate the flutter valve of cyclone separator to be arranged in dense-phase bed to reduce catalyst stack less, in first regenerator, the actual height being in the catalyst layer of dense fluidized state can higher than the height of the reclaimable catalyst entrance of the first regenerator, the bed height being in the catalyst of dense fluidized state in first regenerator and Second reactivator all can not have the flutter valve of cyclone separator yet, this is well-known to those skilled in the art, described inclined tube to be generated 38 can be positioned at the bottom of the dilute-phase leanphase fluidized bed section of described first regenerator or the top of dense bed section, and described regenerator sloped tube 9 can be positioned at the top of the dense bed section of described Second reactivator.Described dilute-phase leanphase fluidized bed section and dense bed section are well-known to those skilled in the art, so arrange the coke burning degree and bed linear speed that can ensure that dense-phase bed is suitable, and the arrangement space requirement that two stage cyclone separator is enough, and the utility model repeats no more.
According to the utility model, the outside of described first regenerator 1 can be provided with the first auxiliary combustion chamber 6 of the regeneration oxygen-containing gas sending into described first regenerator 1 for preheating, and/or the outside of Second reactivator 2 can be provided with the second auxiliary combustion chamber 7 sending into the regeneration oxygen-containing gas of described Second reactivator 2 for preheating.During normal operating, described regeneration oxygen-containing gas directly can be sent in described first regenerator 1 and/or Second reactivator 2 and be used for regeneration, when going into operation or when two regenerator temperature decline, regeneration oxygen-containing gas can be sent in regenerator after preheating in auxiliary combustion chamber again.Described auxiliary combustion chamber is well-known to those skilled in the art, and the utility model repeats no more.
According to the utility model, for ensureing that regeneration oxygen-containing gas is evenly distributed and fully contacts with catalyst in the first regenerator 1 with Second reactivator 2, effect and fluidized state is burnt to reach good, bottom in described first regenerator 1 cavity can be provided with the oxygen-containing gas distribution rings 10 for being uniformly distributed the regeneration oxygen-containing gas sending into described first regenerator 1, and/or the bottom in Second reactivator 2 cavity can be provided with the oxygen-containing gas distributor pipe 8 for being uniformly distributed the regeneration oxygen-containing gas sending into described Second reactivator 2.Wherein, described oxygen-containing gas distribution rings 10 at least should arrange 1 wear resistant short tube; Described oxygen-containing gas distributor pipe 8 generally adopts dendroid distributor pipe, and each dendritic branched pipe also at least should arrange 1 wear resistant short tube, and therefore the distributed effect of oxygen-containing gas distributor pipe 8 pairs of gases is generally better than oxygen-containing gas distribution rings.
According to the utility model, in order to the catalyst carried secretly in reclaiming flue gas, reduce catalyst stack less, primary cyclone again and again 11 and the secondary cyclone 12 again and again of at least one group of series winding can be provided with in the dilute-phase leanphase fluidized bed section of described first regenerator 1, in the dilute-phase leanphase fluidized bed section of described Second reactivator 2, also can be provided with at least one group of two primary cyclone 28 and two secondary cyclones 29 more again of contacting.Described cyclone separator is well known to those skilled in the art, and the utility model repeats no more.According to detailed description of the invention of the present utility model, described first regenerator 1 and/or Second reactivator 2 can be provided with one or more groups two stage cyclone separator.General one group of two stage cyclone separator comprises a primary cyclone and a secondary cyclone of series connection; When being provided with many group two stage cyclone separators, primary cyclone is generally identical with the quantity of secondary cyclone, between can be connected one to one by riser, also can be after the riser of multiple primary cyclone merges into a concetrated pipe, be connected with multiple secondary cyclone again, the riser of secondary cyclone is all connected with collection chamber, and described collection chamber can in the inside of regenerator, also can in the outside of regenerator.
According to the utility model, because the temperature control of the first regenerator 1 and Second reactivator 2 plays an important role to the heat endurance of catalyst and activity, and regeneration is burnt and can be released large calorimetric, for maintaining regenerator temperature, the top of the dense bed section of described first regenerator 1 can be communicated with by the catalyst inlet of inclined tube on external warmer 21 with external warmer 4; The catalyst outlet of described external warmer 4 can be communicated with described semi regeneration inclined tube 25 by external warmer lower oblique tube 23, or can be communicated with the top of external warmer catalyst riser 39 with the dense bed section of described first regenerator 1 by external warmer lower oblique tube 23 successively.The utility model at least can be provided with an external warmer 4, can be provided with at least one group of heat-obtaining tube bank in each external warmer 4, and often organizing tube bank can excise separately, can not affect the operation of external warmer 4 and regenerative system when wherein one group of tube bank booster.The bottom of described external warmer 4 can be provided with the fluidizing agent distributor pipe 22 for being uniformly distributed the fluidizing agent sending into described external warmer 4, described fluidizing agent distributor pipe 22 can adopt dendroid distributor pipe, and fluidizing agent can include but not limited to be selected from least one in air, steam, nitrogen, flue gas and other inert gases.Described external warmer lower oblique tube 23 can be provided with guiding valve 24 under the external warmer of the discharge for controlling heat-obtaining rear catalyst, adjust the described regeneration temperature of the first regenerator 1 and/or the regeneration temperature of described Second reactivator 2, namely catalyst circulation amount (also can pass through adjustment fluidizing agent flow) can be controlled by guiding valve under external warmer 24, realize the adjustment of heat-obtaining load 0-100%, thus the temperature realizing the first regenerator 1 and/or Second reactivator 2 controls.
In the utility model, according to the difference of two regenerator relative elevations, semi regeneration catalyst can have two kinds by the first regenerator to the mode of movement of Second reactivator: when the bottom of the first regenerator 1 higher than the bottom of Second reactivator 2 more time, semi regeneration catalyst outlet bottom described first regenerator 1 can be communicated with the semi regeneration catalyst inlet bottom described Second reactivator 2 by semi regeneration inclined tube 25, and semi regeneration catalyst directly can be flow to the bottom of Second reactivator 2 certainly by deadweight by semi regeneration inclined tube 25; When the bottom of the first regenerator 1 lower than the bottom of Second reactivator 2 or identical even slightly high some time, semi regeneration catalyst outlet bottom described first regenerator 1 can be communicated with the semi regeneration catalyst inlet bottom described Second reactivator 2 with semi regeneration riser 27 by semi regeneration inclined tube 25 successively, semi regeneration catalyst can flow to semi regeneration riser 27 by semi regeneration inclined tube 25, and the lifting wind conveying semi regeneration catalyst in recycling semi regeneration riser 27 is to the bottom of Second reactivator 2.In addition, described semi regeneration inclined tube 25 can be provided with the semi regeneration guiding valve 26 for controlling described first regenerator 1 catalyst material level.
According to the utility model, when taking the renovation process of aforesaid two-stage regeneration, containing superfluous oxygen in Second reactivator flue gas, containing carbon monoxide in first regenerator flue gas, therefore burn after the flue gas sent from described first regenerator 1 can being mixed with the flue gas sent from described Second reactivator 2, obtain combustion product gases and carry out energy regenerating, namely the exhanst gas outlet at described first regenerator 1 top can be communicated with mixed combustion flue 3 by flue 20 again and again, the exhanst gas outlet at described Second reactivator 2 top can by two again flue 37 be communicated with described mixed combustion flue 3, thus mixed flue gas can be burnt in mixed combustion flue 3.This not only can improve the temperature of mixed flue gas, is conducive to follow-up system and reclaims heat, reduce oxygen-containing gas consumption and oxygen-containing gas blower fan wasted work, the carbonomonoxide concentration too high environmental pollution brought when simultaneously can avoid fume emission.Certainly, according to other renovation process, containing excessive carbon monoxide in regenerative mixed flue gas, air can be passed into carry out the excessive carbon monoxide that burns in mixed combustion flue 3; If in regenerative mixed flue gas containing excessive oxygen containing carbon monoxide, can directly by smoke stack emission in air.
According to the utility model, first regenerator 1 still may carry a small amount of catalyst secretly after being separated respectively through at least one group of two stage cyclone separator with flue gas in Second reactivator 2, therefore described combustion product gases can be removed further the catalyst of entrained with, namely the combustion product gases outlet of described mixed combustion flue 3 can be communicated with smoke duster 5, further recovery of catalyst fines, to reduce catalyst cost.Cyclone separator or filter can be provided with in described smoke duster 5.Can be provided with at least one cyclone separator or cyclone separating single tube in described cyclone separator, described filter can be provided with the blowback system that subregion periodically carries out blowback, guarantees that the overall pressure-difference fluctuation of filter is little.
To provide detailed description of the invention of the present utility model with reference to the accompanying drawings below, thus further illustrate the utility model, but therefore the utility model is not subject to any restriction.
A kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model as shown in Figure 1.
First regenerator 1 and Second reactivator 2 are block form layout, and the absolute altitude of Second reactivator 2 is higher than the first regenerator 1.First the reclaimable catalyst that organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system comes enters the bottom of dilute-phase leanphase fluidized bed section or the top of dense bed section on the first regenerator 1 top by inclined tube 38 to be generated, first oxygen-containing gas enters from the oxygen-containing gas distribution rings 10 of the first regenerator 1 bottom after the first auxiliary combustion chamber 6 preheating, burns with reclaimable catalyst adverse current.Partially catalyzed agent enters external warmer 4 through from after the fluidizing agent heat-obtaining of fluidizing agent distributor pipe 22 through inclined tube on external warmer 21, enter in semi regeneration riser 27 through external warmer lower oblique tube 23, wherein, under external warmer, guiding valve 24 is used for controlling the flow of heat-obtaining rear catalyst.The semi regeneration catalyst of high temperature flows out through semi regeneration inclined tube 25 bottom the first regenerator 1, after semi regeneration guiding valve 26 controls flow, mix with the low temperature catalyst after external warmer 4 heat-obtaining, by the lifting wind in semi regeneration riser 27 by mixed semi regeneration catalyst transport to the bottom of Second reactivator 2.Second oxygen-containing gas enters the bottom of Second reactivator 2 after the second auxiliary combustion chamber 7 preheating from oxygen-containing gas distributor pipe 8, burn with the following current of semi regeneration catalyst, gained regenerated catalyst from the top of Second reactivator 2 dense bed section by regenerator sloped tube 9 Returning reacting system.
The flue gas of the first regenerator 1 by primary cyclone 11 again and again and again and again draft tube 13 enter again and again secondary cyclone 12 and isolate the catalyst that the overwhelming majority carries secretly, through the flue gas of the first regenerator 1 separation pass through again and again secondary riser 16, again and again collection chamber 19 and again and again flue 20 enter mixed combustion flue 3; The catalyst be separated is respectively through primary dipleg 14, again and again one-level flutter valve 15 again and again and secondary dipleg 17, again and again secondary flutter valve 18 return in the dense-phase bed section of the first regenerator 1 again and again.The flue gas of Second reactivator 2 by two again primary cyclone 28, two again draft tube 30 enter two again secondary cyclone 29 isolate the catalyst that the overwhelming majority carries secretly, through the flue gas of Second reactivator 2 that separation by two again secondary riser 33, two again collection chamber 36 and two again flue 37 enter in mixed combustion flue 3, the catalyst of entrained with respectively through two again primary dipleg 31, two again one-level flutter valve 32 and two again secondary dipleg 34, two again secondary flutter valve 35 return in the dense bed section of Second reactivator 2.Mixed flue gas enters smoke duster 5 and reclaims catalyst further after entering mixed combustion flue 3 burning.
The another kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model as shown in Figure 2.
The difference of Fig. 2 and Fig. 1 is, the part high temperature catalyst taken out from the first regenerator 1 enters through external warmer catalyst riser 39 in the dense bed section of the first regenerator 1 after external warmer 4 heat-obtaining.
Further a kind of detailed description of the invention of organic oxygen compound catalytic cracking arenes catalytic agent regenerative system of the present utility model as shown in Figure 3.
The difference of Fig. 3 and Fig. 2 is, first regenerator 1 and Second reactivator 2 are block form layout, but the absolute altitude of Second reactivator 2 is lower than the first regenerator 1, the semi regeneration catalyst therefore transferred out from the first regenerator 1 can utilize deadweight certainly to flow to the bottom of the dense bed section of Second reactivator 2 by semi regeneration inclined tube 25.
Claims (10)
1. a regenerative system for organic oxygen compound catalytic cracking arenes catalytic agent, is characterized in that, described regenerative system comprises the first regenerator (1) and the Second reactivator (2) of block form layout; The reclaimable catalyst entrance on described first regenerator (1) top is communicated with the inclined tube to be generated (38) for the reclaimable catalyst outlet with organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system, and the regenerated catalyst outlet at described Second reactivator (2) middle part is communicated with the regenerator sloped tube (9) for being communicated with the regenerated catalyst inlet of described organic oxygen compound catalytic cracking aromatic hydrocarbons reaction system; The semi regeneration catalyst outlet of described first regenerator (1) bottom is communicated with by semi regeneration inclined tube (25) with the semi regeneration catalyst inlet of described Second reactivator (2) bottom.
2. regenerative system according to claim 1, is characterized in that, the top of described first regenerator (1) and described Second reactivator (2) is all set to dilute-phase leanphase fluidized bed section, and bottom is all set to dense bed section; Described inclined tube to be generated (38) is positioned at the bottom of the dilute-phase leanphase fluidized bed section of described first regenerator or the top of dense bed section, and described regenerator sloped tube (9) is positioned at the top of the dense bed section of described Second reactivator.
3. regenerative system according to claim 1, it is characterized in that, the outer setting of described first regenerator (1) has first auxiliary combustion chamber (6) of the regeneration oxygen-containing gas sending into described first regenerator (1) for preheating, and/or the outer setting of Second reactivator (2) has the second auxiliary combustion chamber (7) sending into the regeneration oxygen-containing gas of described Second reactivator (2) for preheating.
4. regenerative system according to claim 1, it is characterized in that, bottom in described first regenerator (1) cavity is provided with the oxygen-containing gas distribution rings (10) for being uniformly distributed the regeneration oxygen-containing gas sending into described first regenerator (1), and/or the bottom in Second reactivator (2) cavity is provided with the oxygen-containing gas distributor pipe (8) for being uniformly distributed the regeneration oxygen-containing gas sending into described Second reactivator (2).
5. regenerative system according to claim 2, it is characterized in that, be provided with primary cyclone again and again (11) and the secondary cyclone (12) again and again of at least one group of series winding in the dilute-phase leanphase fluidized bed section of described first regenerator (1), in the dilute-phase leanphase fluidized bed section of described Second reactivator (2), be provided with at least one group of two primary cyclone (28) and two secondary cyclones (29) more again of contacting.
6. regenerative system according to claim 2, is characterized in that, the top of the dense bed section of described first regenerator (1) is communicated with by the catalyst inlet of inclined tube on external warmer (21) with external warmer (4); The catalyst outlet of described external warmer (4) is communicated with described semi regeneration inclined tube (25) by external warmer lower oblique tube (23), or is communicated with the top of external warmer catalyst riser (39) with the dense bed section of described first regenerator (1) by external warmer lower oblique tube (23) successively.
7. regenerative system according to claim 6, it is characterized in that, the bottom of described external warmer (4) is provided with the fluidizing agent distributor pipe (22) for being uniformly distributed the fluidizing agent sending into described external warmer (4), described external warmer lower oblique tube (23) is provided with guiding valve (24) under the external warmer of the discharge for controlling heat-obtaining rear catalyst.
8. regenerative system according to claim 1, it is characterized in that, the semi regeneration catalyst outlet of described first regenerator (1) bottom is communicated with the semi regeneration catalyst inlet of semi regeneration riser (27) with described Second reactivator (2) bottom by semi regeneration inclined tube (25) successively, described semi regeneration inclined tube (25) is provided with the semi regeneration guiding valve (26) for controlling described first regenerator (1) catalyst material level.
9. regenerative system according to claim 1, it is characterized in that, the exhanst gas outlet at described first regenerator (1) top is communicated with mixed combustion flue (3) by flue (20) again and again, the exhanst gas outlet at described Second reactivator (2) top pass through two again flue (37) be communicated with described mixed combustion flue (3).
10. regenerative system according to claim 9, is characterized in that, the combustion product gases outlet of described mixed combustion flue (3) is communicated with smoke duster (5).
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