CN105154128A - Tubular fixed bed methanol to gasoline process - Google Patents
Tubular fixed bed methanol to gasoline process Download PDFInfo
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- CN105154128A CN105154128A CN201510559571.3A CN201510559571A CN105154128A CN 105154128 A CN105154128 A CN 105154128A CN 201510559571 A CN201510559571 A CN 201510559571A CN 105154128 A CN105154128 A CN 105154128A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
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Abstract
The invention discloses a tubular fixed bed methanol to gasoline process. A two-stage method methanol to gasoline process is adopted, namely, methanol first generates a dehydration reaction in a fixed bed reactor, and a raw material subjected to dehydration enters a gasoline reactor to produce a gasoline product. The gasoline reactor in the process adopts a parallel tubular fixed bed reactor, so that the temperature of the gasoline reactor is easy to control, and thus not only the circulation volume of recycle gas is reduced, but also the reaction heat consumed by the recycle gas is converted into steam. Through adjusting the circulation volume of the recycle gas to adjust the temperature of a methanol dehydration reaction, a certain temperature gradient exists between two reactors, and through the reasonable design of a heat exchanging system, the heat discharged during a gasoline synthesis reaction is recycled, so that the heat discharged during the gasoline synthesis reaction is used reasonably.
Description
Technical field
The present invention relates to preparing gasoline by methanol field, be specifically related to a kind of calandria type fixed bed preparing gasoline by methanol technique.
Background technology
Preparing gasoline by methanol (MethanoltoGasoline) technology is with the bulk product methyl alcohol of Coal Chemical Industry for raw material, and production petrochemical complex end product gasoline is the gordian technique of the following petroleum resources shortage of reply in world wide.In conjunction with the few energy structure of oil of the rich coal of China and the present situation of coal chemical industry fast development, development preparing gasoline by methanol is all significant to adaptation China energy structure, Development of Novel Coal Chemical Industry.
From Mobil company since last century succeeds in developing preparing gasoline by methanol technique, technique for preparing gasoline by methanol develops the kinds of processes such as fixed bed, fluidized-bed technology.Fixed bed technique for preparing gasoline by methanol adopts several fixed-bed reactor parallel connections, wherein a reactor on-line regeneration is to solve the problem of the easy coking of preparing gasoline by methanol catalysts, the mode simultaneously adopting a large amount of circulation gas to return fixed-bed reactor solves the problem that exothermic heat of reaction amount is large, bed temperature is high, and recycle ratio is up to 9 ~ 10:1.Fluidized-bed technique for preparing gasoline by methanol adopts the good fluidized-bed of heat transfer property to carry out preparing gasoline by methanol reaction, and catalyzer continuous circulation between reaction bed and revivifier realizes regeneration.
Bed technology adopts high recycle ratio to control temperature of reaction, and circulation gas needs to consume a large amount of energy in cooling, preheating, pressurized circulation process, and in reaction, liberated heat also consumes in circulation gas warm.In fluidization gasoline products, low-carbon (LC) product assay is high, and gasoline yield is lower than bed technology.
The fixed bed technique for preparing gasoline by methanol that the present invention adopts gasoline yield higher, by the energy waste adopting calandria type fixed bed reactor to reduce preparing gasoline by methanol process, improves capacity usage ratio.
Summary of the invention
The object of this invention is to provide a kind of calandria type fixed bed preparing gasoline by methanol technique, solve the problem that traditional fixed bed technique for preparing gasoline by methanol energy consumption is high, capacity usage ratio is low.
Technical scheme of the present invention is: a kind of calandria type fixed bed preparing gasoline by methanol technique, comprises the following steps:
A) material benzenemethanol or crude carbinol are after methyl alcohol vaporizing device (1) gasification, the first feed preheater (2) is mixed into the circulation gas from recycle gas compressor (10), the unstripped gas going out the first feed preheater enters Dehydration of methanol device (3) and dehydration reaction occurs, the unstripped gas going out Dehydration of methanol device enters the second feed preheater (4), and the gas going out the second feed preheater enters calandria type fixed bed gasoline reactor (5) and preparing gasoline by methanol reaction occurs; The heat that reaction produces is shifted out reactor by vapour generator (6) and recycle pump (7) by calandria type fixed bed gasoline reactor (5), utilizes steam generation by reaction heat;
B) product of preparing gasoline by methanol reaction is successively after the second feed gas heater (4), the first feed gas heater (2), after whole cooler (8) further cooling, enter gasoline products separator (9);
C) there is three phase separation in the gasoline products separator (9) in product, and small part gas-phase product is sent outside as fuel gas, and most of gas-phase product enters Returning reacting system after recycle gas compressor (10) supercharging; Liquid phase is divided into two-phase after leaving standstill: light constituent send follow-up oil product processing unit as raw gasline product, and heavy constituent is mainly the water that reaction generates, and delivers to treatment unit for waste water.
Preferably, calandria type fixed bed reactor is two or multiple stage parallel connection, and when normally running, at least one is in catalyst regeneration or stand-by state, and all the other are in production status, the public a set of steam generating system of multiple stage calandria type fixed bed reactor.
Preferably, material benzenemethanol and circulation gas are preheated to 200 ~ 250 DEG C in the first feed preheater, preferably 200 ~ 220 DEG C, pressure 1.5 ~ 3.4MPaG, preferably 2.0 ~ 2.3MPaG.
Preferably, by regulating circulating flow rate to control material benzenemethanol dehydration reactor temperature out, reactor outlet temperature controls at 250 ~ 300 DEG C, and circulation gas and methanol molar ratio control at 1 ~ 5:1, and preferably 3.5.
Preferably, the temperature in of calandria type fixed bed gasoline reactor is 300 ~ 400 DEG C, and reactor outlet temperature is controlled by the internal circulating load of steam regulation generation systems, and reactor outlet temperature controls in 350 ~ 450 DEG C.
Preferably, gasoline products separator operating temperature controls at 40 ~ 60 DEG C, and pressure-controlling is at 1.2 ~ 2.8MPaG.
Preferably, steam generating system comprises vapour generator, recycle pump and connecting tube, and heat-conducting medium adopts recirculated water, thermal oil or melting salt; Usually, when heat-conducting medium is recirculated water, corresponding vapour generator is drum.
The principal feature that the present invention is better than prior art is:
1) calandria type fixed bed reactor in parallel is adopted, not only make the temperature of gasoline reactor control, reduce the recycle ratio of circulation gas, the energy consumption of working cycle greatly reduces, the reaction heat expended in simultaneously circulation gas circulation can be used for byproduct steam, improves capacity usage ratio.
2) two or multiple stage reactor can share a set of steam generating system, save the investment of reactor assembly.
3) temperature of Dehydration of methanol device can be controlled by circulation gas add-on, the reaction generating dme due to methanol dehydration is thermodynamic(al)equilibrium reaction, temperature is lower, level of response is higher, liberated heat is more, and the present invention controls Dehydration of methanol device temperature out in lower scope, makes Dehydration of methanol carry out more complete, release more heat, what reduce gasoline reactor moves thermal load.
4) utilize the thermograde of Dehydration of methanol device and gasoline reactor, two-stage feed preheater is set, utilize reaction liberated heat better.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the calandria type fixed bed preparing gasoline by methanol of the present invention.
In figure, methyl alcohol vaporizing device (1), first feed preheater (2), Dehydration of methanol device (3), the second feed preheater (4), calandria type fixed bed gasoline reactor (5), vapour generator (6), recycle pump (7), whole cooler (8), gasoline products separator (9), recycle gas compressor (10).
Embodiment
Below in conjunction with accompanying drawing, content of the present invention is described in detail.
As shown in Figure 1, material benzenemethanol or crude carbinol are after methanol gasifying device (1), the first feed preheater (2) is mixed into the circulation gas from recycle gas compressor (10), the unstripped gas going out the first feed preheater enters Dehydration of methanol device (3) and dehydration reaction occurs, the unstripped gas going out Dehydration of methanol device enters the second feed preheater (4), and the gas going out the second feed preheater enters calandria type fixed bed gasoline reactor (5) and preparing gasoline by methanol reaction occurs.The heat that reaction produces is shifted out reactor by vapour generator (6) and recycle pump (7) by calandria type fixed bed gasoline reactor (5), utilizes steam generation by reaction heat.
The reaction product going out calandria type fixed bed gasoline reactor, successively after the second feed gas heater, the first feed gas heater, is cooled to 40 DEG C through whole cooler (8) and enters gasoline products separator (9) and carry out three phase separation.
Gasoline products separator (9) small part gas-phase product is sent outside as fuel gas, and most of gas-phase product enters Returning reacting system after recycle gas compressor (10) supercharging; Liquid phase is divided into two-phase after leaving standstill: light constituent send follow-up oil product processing unit as raw gasline product, and heavy constituent is mainly the water that reaction generates, and delivers to treatment unit for waste water.
Methyl alcohol and circulation gas are preheated to 200 DEG C through the first feed preheater (2) and enter Dehydration of methanol device (3), and the service temperature of Dehydration of methanol device is 200 ~ 250 DEG C, working pressure 2.3MPaG.The product of Dehydration of methanol is preheated to 350 DEG C through the second feed preheater (4) and enters gasoline reactor (9), gasoline reactor service temperature 350 ~ 400 DEG C, working pressure 2.2MPaG, the recycle ratio of circulation gas is 3.5, steam system by-product 2.5MPaG saturation steam amount is 0.08 ~ 0.1 ton of/ton of methyl alcohol, and with existing technics comparing, circulation gas recycle ratio greatly reduces, the heat by-product some vapor of by-product, carries out Appropriate application to heat of reaction.
The above; it is only preferred embodiment of the present invention; not any restriction is done to the present invention, every above embodiment is done according to invention technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solution of the present invention.
Claims (7)
1. a calandria type fixed bed preparing gasoline by methanol technique, is characterized in that comprising the following steps:
A) material benzenemethanol or crude carbinol are after methyl alcohol vaporizing device (1) gasification, the first feed preheater (2) is mixed into the circulation gas from recycle gas compressor (10), the unstripped gas going out the first feed preheater enters Dehydration of methanol device (3) and dehydration reaction occurs, the unstripped gas going out Dehydration of methanol device enters the second feed preheater (4), and the gas going out the second feed preheater enters calandria type fixed bed gasoline reactor (5) and preparing gasoline by methanol reaction occurs; The heat that reaction produces is shifted out reactor by vapour generator (6) and recycle pump (7) by calandria type fixed bed gasoline reactor (5), utilizes steam generation by reaction heat;
B) product of preparing gasoline by methanol reaction is successively after the second feed gas heater (4), the first feed gas heater (2), after whole cooler (8) further cooling, enter gasoline products separator (9);
C) there is three phase separation in the gasoline products separator (9) in product, and small part gas-phase product is sent outside as fuel gas, and most of gas-phase product enters Returning reacting system after recycle gas compressor (10) supercharging; Liquid phase is divided into two-phase after leaving standstill: light constituent send follow-up oil product processing unit as raw gasline product, and heavy constituent is mainly the water that reaction generates, and delivers to treatment unit for waste water.
2. calandria type fixed bed preparing gasoline by methanol technique according to claim 1, it is characterized in that: calandria type fixed bed reactor (5) is two or multiple stage parallel connection, during normal operation, at least one is in catalyst regeneration or stand-by state, all the other are in production status, the public a set of steam generating system of multiple stage calandria type fixed bed reactor (5).
3. calandria type fixed bed preparing gasoline by methanol technique according to claim 1, it is characterized in that: material benzenemethanol and circulation gas are preheated to 200 ~ 250 DEG C in the first feed preheater (2), preferably 200 ~ 220 DEG C, pressure 1.5 ~ 3.4MPaG, preferably 2.0 ~ 2.3MPaG.
4. calandria type fixed bed preparing gasoline by methanol technique according to claim 1, it is characterized in that: control material benzenemethanol dehydration reactor (3) temperature out by regulating circulating flow rate, reactor outlet temperature controls at 250 ~ 300 DEG C, circulation gas and methanol molar ratio control at 1 ~ 5:1, and preferably 3.5.
5. calandria type fixed bed preparing gasoline by methanol technique according to claim 1, it is characterized in that: the temperature in of calandria type fixed bed gasoline reactor (5) is 300 ~ 400 DEG C, reactor outlet temperature is controlled by the internal circulating load of steam regulation generation systems, and reactor outlet temperature controls in 350 ~ 450 DEG C.
6. calandria type fixed bed preparing gasoline by methanol technique according to claim 1, is characterized in that: gasoline products separator (9) service temperature controls at 40 ~ 60 DEG C, and pressure-controlling is at 1.2 ~ 2.8MPaG.
7. calandria type fixed bed preparing gasoline by methanol technique according to claim 2, it is characterized in that: steam generating system comprises vapour generator (6), recycle pump (7) and connecting tube, heat-conducting medium adopts recirculated water, thermal oil or melting salt; Usually, when heat-conducting medium is recirculated water, corresponding vapour generator (6) is drum.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510559571.3A CN105154128A (en) | 2015-09-06 | 2015-09-06 | Tubular fixed bed methanol to gasoline process |
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| CN201510559571.3A CN105154128A (en) | 2015-09-06 | 2015-09-06 | Tubular fixed bed methanol to gasoline process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925301A (en) * | 2016-07-08 | 2016-09-07 | 鲁盈 | Technique for preparing gasoline from methyl alcohol through combined bed |
| CN106010626A (en) * | 2016-07-08 | 2016-10-12 | 成都赛普瑞兴科技有限公司 | Process of preparing stable light hydrocarbon through methanol conversion in isothermal method |
| CN108211778A (en) * | 2016-12-22 | 2018-06-29 | 中国石油天然气集团公司 | A kind of catalytic oxidation system and method for VOCs waste gas pollution control and treatments |
Citations (6)
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|---|---|---|---|---|
| US4404414A (en) * | 1982-09-28 | 1983-09-13 | Mobil Oil Corporation | Conversion of methanol to gasoline |
| US4406777A (en) * | 1982-01-19 | 1983-09-27 | Mobil Oil Corporation | Fixed bed reactor operation |
| US4481305A (en) * | 1982-09-07 | 1984-11-06 | Haldor Topsoe A/S | Process for the preparation of hydrocarbons |
| EP0124988A2 (en) * | 1983-04-13 | 1984-11-14 | Mobil Oil Corporation | Process for converting methanol into gasoline |
| CN101723775A (en) * | 2008-11-04 | 2010-06-09 | 杭州林达化工技术工程有限公司 | Method and equipment for preparing hydrocarbon by methyl alcohol or/ and dimethyl ether |
| CN102391888A (en) * | 2011-09-23 | 2012-03-28 | 冯保运 | Process for producing methanol-to-hydrocarbon-based fuel (MTHF) |
-
2015
- 2015-09-06 CN CN201510559571.3A patent/CN105154128A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406777A (en) * | 1982-01-19 | 1983-09-27 | Mobil Oil Corporation | Fixed bed reactor operation |
| US4481305A (en) * | 1982-09-07 | 1984-11-06 | Haldor Topsoe A/S | Process for the preparation of hydrocarbons |
| US4404414A (en) * | 1982-09-28 | 1983-09-13 | Mobil Oil Corporation | Conversion of methanol to gasoline |
| EP0124988A2 (en) * | 1983-04-13 | 1984-11-14 | Mobil Oil Corporation | Process for converting methanol into gasoline |
| CN101723775A (en) * | 2008-11-04 | 2010-06-09 | 杭州林达化工技术工程有限公司 | Method and equipment for preparing hydrocarbon by methyl alcohol or/ and dimethyl ether |
| CN102391888A (en) * | 2011-09-23 | 2012-03-28 | 冯保运 | Process for producing methanol-to-hydrocarbon-based fuel (MTHF) |
Non-Patent Citations (2)
| Title |
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| 张德祥: "《煤制油技术基础与应用研究》", 31 January 2013, 上海科学技术出版社 * |
| 李绍芬: "《反应工程》", 30 April 1999 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925301A (en) * | 2016-07-08 | 2016-09-07 | 鲁盈 | Technique for preparing gasoline from methyl alcohol through combined bed |
| CN106010626A (en) * | 2016-07-08 | 2016-10-12 | 成都赛普瑞兴科技有限公司 | Process of preparing stable light hydrocarbon through methanol conversion in isothermal method |
| CN108211778A (en) * | 2016-12-22 | 2018-06-29 | 中国石油天然气集团公司 | A kind of catalytic oxidation system and method for VOCs waste gas pollution control and treatments |
| CN108211778B (en) * | 2016-12-22 | 2020-10-09 | 中国石油天然气集团公司 | Catalytic oxidation system and method for VOCs waste gas treatment |
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