CN110819374B - Device and method for preparing gasoline from oxygen-containing compound - Google Patents

Device and method for preparing gasoline from oxygen-containing compound Download PDF

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Publication number
CN110819374B
CN110819374B CN201810888048.9A CN201810888048A CN110819374B CN 110819374 B CN110819374 B CN 110819374B CN 201810888048 A CN201810888048 A CN 201810888048A CN 110819374 B CN110819374 B CN 110819374B
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China
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reactor
regenerator
gas
catalyst
fluidized bed
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CN110819374A (en
Inventor
刘昱
施磊
乔立功
李海瑞
张洁
昌国平
王雷
吴咏斐
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Sinopec Engineering Group Co Ltd
Sinopec Guangzhou Engineering Co Ltd
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Sinopec Engineering Group Co Ltd
Sinopec Guangzhou Engineering Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/54—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids characterised by the catalytic bed
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/54—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids characterised by the catalytic bed
    • C10G3/55—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids characterised by the catalytic bed with moving solid particles, e.g. moving beds
    • C10G3/57—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids characterised by the catalytic bed with moving solid particles, e.g. moving beds according to the fluidised bed technique
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
    • C10G3/62—Catalyst regeneration
    • 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

Abstract

The invention discloses a device and a method for preparing gasoline from oxygen-containing compounds, which comprises a reactor, a riser reactor, a regenerator, a heat remover outside the reactor and a spent stripper, and is characterized in that: the regenerator is connected with the riser reactor through a regeneration slide valve, and the riser reactor extends into the reactor; an external heat collector is arranged outside the reactor, a raw material inlet and a feeding distributor are arranged at the bottom of the reactor, and the raw material inlet is introduced into the feeding distributor for distribution; the spent stripper is respectively communicated with the bottoms of the reactor and the regenerator; the reactor and the regenerator are arranged in parallel, and the reactor is higher than the regenerator. By adopting the device provided by the invention, the selectivity of the target product can be improved to the greatest extent; by adopting the device provided by the invention, the problems of high bed layer and difficult fluidization of the catalyst in the reactor and the regenerator are solved, and the fluidization state is maintained; the device provided by the invention can meet the requirements of reaction regeneration conditions of the MTG process.

Description

Device and method for preparing gasoline from oxygen-containing compound
Technical Field
The invention relates to the technical field of hydrocarbon preparation from one or more non-hydrocarbon compounds, in particular to a device and a method for preparing gasoline from oxygen-containing compounds.
Background
Methanol is an important chemical product and chemical raw material, and is one of the future clean energy sources. As a key product of chemical engineering, methanol is the best way to produce other chemical products or synthetic fuels from natural gas or coal, and its importance is self-evident. Although the methanol can be directly blended into gasoline to be used as methanol gasoline fuel, the methanol has better economic benefit value when being directly converted into gasoline than when being blended into gasoline for use. Therefore, the successful development and the industrial application of the technology for preparing the gasoline from the methanol not only relieve the problems of petroleum shortage, excessive methanol and the like in China, but also enrich the technical route of preparing the oil from the coal, and have important strategic and practical significance.
Oxygen-containing organic compounds represented by methanol or dimethyl ether are typical oxygen-containing organic compounds, and are mainly produced from coal-based or natural gas-based synthesis gas. The process for producing gasoline from an oxygen-containing organic compound represented by methanol is currently mainly the MTG technology. At present, the processes for preparing gasoline by using methanol in the world mainly comprise: the process comprises a process for preparing gasoline from exxon-Mobil Methanol (MTG), a Fischer-Tropsch synthesis process (FT), a Torpo integrated gasoline synthesis process (TIGAS) and a domestic one-step methanol conversion gasoline preparation technology. Wherein the Exxon-Mobil methanol-to-gasoline process (MTG) technology is the most mature, and the industrial application is the most in the world.
In recent years, the method of producing gasoline from oxygenates has become a focus and focus of research for those skilled in the art. People have conducted extensive research and exploration in the aspects of process flows, equipment structures and the like.
Chinese patent CN101182276B discloses a method for preparing gasoline by methanol conversion, which is to increase the total catalyst bed length of the reactor, and at the same time, add several pairs of material inlets and outlets on the side wall of the reactor, these material inlets and outlets divide the catalyst bed in the reactor into several sections of shorter catalyst beds, and through the switch of the valves installed on the inlets and outlets, the reaction materials always pass through the shorter catalyst beds when passing through the reactor, so as to achieve the purpose of realizing the complete conversion of methanol, reducing the pressure drop of the bed, prolonging the regeneration period and the replacement period of the catalyst, simplifying the process operation, and improving the production efficiency and the process technology and economic performance. The invention is only suitable for the fixed bed, needs frequent regeneration, has long operation period, is not beneficial to the timely export of reaction heat, and has the problem of non-uniform temperature distribution of the reaction bed layer.
Chinese patent CN105419849A discloses an energy-saving process for preparing gasoline by methanol conversion, which comprises the following steps: gasifying the raw material methanol and then entering a first pre-reactor for pre-reaction; the outlet gas of the first pre-reactor 1 enters a second pre-reactor for reaction, the reaction outlet gas of the second pre-reactor enters a synthetic oil reactor for reaction and then enters an oil-gas-water separator for separation, the separated oil phase product is sent to an oil product separator, and a gasoline product, a heavy oil product and a liquefied petroleum gas product are obtained after separation. The invention has the advantages of stable reaction temperature, low circulating energy consumption and low circulating investment. The invention is only suitable for the fixed bed, needs frequent regeneration, has long operation period, is not beneficial to the timely export of reaction heat, and has the problem of non-uniform temperature distribution of the reaction bed layer.
Chinese patent CN105018129B discloses a fluidized bed methanol-to-gasoline device and method, and the invention discloses a fluidized bed methanol-to-gasoline device and method in the fields of coal chemical industry and petrochemical industry, so as to solve the problems of low conversion rate of methanol to gasoline and the like in the prior art. The reactor (26) of the apparatus of the invention is a tubular reactor in which chevron baffles (23) are arranged. A settler (16) is arranged above the reactor, a regenerated catalyst conveying pipe (25) is arranged between the lower part of the regenerator (2) and the settler, and a cooler (27) is arranged on the regenerated catalyst conveying pipe. A heat-taking circulating pipe (15) is arranged outside the reactor, and a heat collector (14) is arranged on the heat-taking circulating pipe. A circulating inclined pipe is arranged between the bottom of the reactor and the lower part of the heat-taking circulating pipe, and a standby vertical pipe is arranged between the circulating inclined pipe and an inlet of the standby inclined pipe; the outlet of the spent inclined tube is connected with the lower part of the spent catalyst conveying pipe (6). The invention discloses a method for preparing gasoline from methanol in a fluidized bed by using the device. The reactor is internally provided with the herringbone baffle, the bottom of the reactor is provided with the feeding distributor, the catalyst bed layer is higher, and the problems of difficult fluidization of the catalyst and the like exist.
Chinese patent CN106794437A discloses an apparatus and process for producing gasoline, olefin and aromatic compounds from oxygenates, which invention provides an apparatus and process for converting oxygenate feedstocks such as methanol and dimethyl ether to hydrocarbons such as gasoline boiling components, olefin and aromatic compounds in a fluidized bed containing a catalyst. The invention has the problems that the reactor is a single reactor, and the catalyst bed layer is high, and the fluidization is difficult.
In summary, in the prior art, the product selectivity is improved to a certain extent by optimizing the internal structure of the reactor, optimizing the process flow and optimizing the operating conditions, but the device type in the prior art has the problems of high catalyst bed layer, difficult catalyst fluidization, difficult heat extraction and large selectivity in the reactor and the regenerator, and the invention specifically solves the problems.
Disclosure of Invention
The invention provides a device for preparing gasoline from oxygen-containing compounds, which is suitable for the characteristics of high temperature, pressurization, strong heat release, high conversion rate requirement, product selectivity requirement and the like of a process for preparing gasoline from oxygen-containing compounds, solves the problems of high catalyst bed layer, difficult fluidization, different gas circulation requirement conditions and the like in the prior art, gives full play to the advantages of respective reactions to the greatest extent, and improves the selectivity of target products.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the device for preparing gasoline from oxygen-containing compounds comprises a reactor, a riser reactor, a regenerator, a heat remover outside the reactor and a spent stripper, and is characterized in that: the regenerator is connected with the riser reactor through a regenerated catalyst conveying pipe, and the riser reactor extends into the reactor; an inner heat collector is arranged inside the reactor, an outer heat collector is arranged outside the reactor, 2-5 layers of feeding distributors are arranged inside the reactor, and raw materials are led into the reactor in multiple strands for reaction; the spent stripper is respectively communicated with the bottoms of the reactor and the regenerator; the reactor and the regenerator are arranged in parallel.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the riser reactor is preferably fed with light hydrocarbon return gas (C)2~C4Gas), the light hydrocarbon return gas may be injected into the upper, middle or lower portion of the riser reactor in one or more separate streams. When the light hydrocarbon is not recycled, the gas (C) is returned2~C4Gas), the riser reactor may be used as a transfer pipe for the regenerated catalyst, and may be used for transferring the regenerated catalyst, and the transfer medium is preferably steam.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the inlet and outlet pipes of the external heat collector are shared, and the external heat collector is connected with the reactor through an external heat outlet inlet pipe. The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the reactor is a fluidized bed reactor, can be a fast bed or a turbulent bed reactor, and is preferably a turbulent bed reactor.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the riser is also used as a transfer tube for regenerated catalyst.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the lower part of the reactor is provided with two layers of feeding distributors, namely a feeding distributor I and a feeding distributor II. Raw materials respectively enter different feeding distributors of the reactor according to reaction requirements, and oxygen-containing compounds such as light hydrocarbon gas, methanol, dimethyl ether and the like or a mixture of the light hydrocarbon gas, the methanol, the dimethyl ether and the like enter the feeding distributor I of the reactor. The second reactor feeding distributor may also be light hydrocarbon gas, methanol, dimethyl ether and other oxygen-containing compounds or their mixture. Oxygen-containing compounds are preferred. The riser reactor is fed with preferably light hydrocarbon return gas (C)2~C4Gas), the light hydrocarbon return gas may be injected into the upper, middle or lower portion of the riser reactor in one or more separate streams.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: one end of the spent stripper is communicated with the bottom of the reactor through a spent agent inlet pipe, and the other end of the spent stripper is communicated with the regenerator through a spent agent conveying pipe. A slide valve is arranged on the spent agent conveying pipe.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the spent stripper is internally provided with a stripping grating or a stripping baffle and a stripping medium distributor.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the feeding distributor is a distribution pipe or a distribution plate, preferably a distribution pipe.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the interior of the reactor is divided into a reactor dilute phase section, a reactor transition section and a reactor dense phase section from top to bottom.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the reactor is internally provided with a gas-solid separation facility, the top of the reactor is provided with an oil-gas collection chamber, and the gas-solid separation facility is introduced into the oil-gas collection chamber.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the gas-solid separation device is a primary cyclone separator and a secondary cyclone separator, and the secondary cyclone separator is introduced into the oil gas collection chamber.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: a third cyclone, preferably external, is provided outside or inside the reactor. Is coaxial with the reactor when being arranged inside the reactor; the reactor three-stage cyclone separator can be vertical or horizontal.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: a reactor fourth-stage cyclone separator is arranged outside the reactor, one end of the reactor fourth-stage cyclone separator is communicated with the reactor third-stage cyclone separator, and the other end of the reactor fourth-stage cyclone separator is communicated with a reactor third-stage recovery catalyst storage tank.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the regenerator is a fluidized bed regenerator, preferably a turbulent fluidized bed regenerator. The regenerator is internally divided into a regenerator dilute phase section, a regenerator transition section and a regenerator coking section. The regenerator char section may be a turbulent bed or a fast bed or a combination of both.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the dilute phase section of the regenerator is provided with a gas-solid separation device, the top of the dilute phase section is provided with a flue gas outlet, the regeneration and burning section is provided with a main air distributor, and the bottom of the regenerator is provided with a main air inlet.
The main wind distributor can be a distribution pipe or/and a distribution plate, preferably a distribution pipe. Not only the main wind is evenly distributed and is wear-resistant, but also the service life is long.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the regenerator is a fluidized bed regenerator, preferably a turbulent fluidized bed regenerator.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the gas-solid separation device in the regenerator is preferably a cyclone separator, and the cyclone separator is 1-3 grade.
The regeneration mode of the catalyst in the regenerator can adopt incomplete regeneration or complete regeneration, and preferably adopts incomplete regeneration.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: and internal and external heat-taking facilities are arranged in the reactor and the regenerator.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: an internal heat taking facility is arranged in the reactor, a heat taking medium can be one or more of an oxygen-containing compound raw material, water, an inert medium and heat conducting oil, the oxygen-containing compound raw material is preferably used as the heat taking medium, the oxygen-containing compound raw material is preferably a liquid phase raw material, and the temperature can be within the range of 25-200 ℃, preferably within the range of 25-150 ℃; the internal heat extraction facility is arranged at the middle lower part of the reaction section of each reactor and above the feeding distributor of the reactor. The external heat-extraction device can be arranged at any position of the upper part, the middle part and the lower part of the reactor, and the middle part is preferred. An external heat taking facility is arranged in the reactor, and the heat taking medium is preferably deoxygenated water so as to generate steam with different grades.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: a heat extraction facility, preferably an external heat extraction facility, is provided in the regenerator. The heat-taking medium is preferably deoxygenated water to generate different grades of steam.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the reactor and the regenerator are both high beds, and the ratio of the height of the catalyst bed in the dense-phase section of the reactor to the diameter of the dense-phase section of the reactor is within the range of 0.5-20.0, preferably within the range of 1-10. The ratio of the height of the catalyst bed in the dense phase section of the regenerator to the diameter of the dense phase section of the regenerator is in the range of 0.5 to 30.0, preferably in the range of 1 to 20.
The reactor of the device for preparing gasoline from oxygen-containing compounds is a multistage series reactor and comprises a riser reactor and a reactor, wherein the reactor can be a riser or a fast bed reactor or a turbulent bed. Raw materials respectively enter different feeding distributors of the reactor according to reaction requirements, and oxygen-containing compounds such as light hydrocarbon gas, methanol, dimethyl ether and the like or a mixture of the light hydrocarbon gas, the methanol, the dimethyl ether and the like enter the feeding distributor I of the reactor. The second reactor feeding distributor may also be light hydrocarbon gas, methanol, dimethyl ether and other oxygen-containing compounds or their mixture. Oxygen-containing compounds are preferred. Preferably light hydrocarbon return gas (C) into the riser reactor2~C4Gas).
The invention also provides a method for preparing gasoline from oxygenated chemicals, which is carried out by the device for preparing gasoline from oxygenated chemicals, and specifically comprises the following steps:
the method for preparing the gasoline by the oxygenated chemicals is characterized by comprising the following steps:
1) light hydrocarbon return gas (C)2~C4Gas) is preheated and then injected into the upper part, the middle part or the lower part of the riser reactor in one or more strands, and is directly contacted with a high-temperature catalyst from a regenerator in the riser reactor to rapidly react under the action of the catalyst, and a reaction product enters the reactor;
2) preheating reaction raw materials, feeding the preheated reaction raw materials into the bottom of a reactor through a first feeding distributor, directly contacting oxygen compounds contained in the reactor with a high-temperature catalyst from a riser reactor, and quickly reacting under the action of the catalyst;
3) preheating reaction raw materials, feeding the preheated reaction raw materials into the lower part of the reactor through a second feeding distributor for reaction, removing most of carried catalyst from reaction products entering the reactor in the step 2) through a gas-solid separation facility of the reactor, removing the carried catalyst through a third-stage cyclone separator of the reactor and a fourth-stage cyclone separator of the reactor, and then leading out;
4) the spent catalyst which loses activity after reaction enters a spent stripper for stripping reaction gas carried by the spent catalyst, and the spent catalyst after stripping enters a regenerator through a spent conveying pipe; after the catalyst to be regenerated is burnt by countercurrent contact with main air in the regenerator, the regenerated catalyst enters the riser reactor through a regenerated catalyst conveying pipe and a regenerated slide valve and is firstly returned with light hydrocarbon gas (C)2~C4Gas) and then enters the reactor to continue reacting with the reaction raw materials such as oxygen-containing compounds and the like.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the reaction raw material entering the feeding distributor I is an oxygen-containing compound single feeding material or a mixed feeding material of the oxygen-containing compound and light hydrocarbon return gas; the reaction raw material entering the second reactor is an oxygen-containing compound and/or light hydrocarbon return gas.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the oxygen-containing compound is an oxygen-containing compound mainly comprising methanol or dimethyl ether, and the light hydrocarbon return gas is C2-C4 gas.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the raw material feeding pipeline is provided with a light hydrocarbon return gas injection port, and light hydrocarbon return gas enters the reactor independently or together with the oxygen-containing compound after being mixed.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the riser reactor is preferably fed with light hydrocarbon return gas (C)2~C4Gas), light hydrocarbon return gas can be injected into the upper part, the middle part or the lower part of the riser reactor in one or more (2-5) strands, and reaction products enter the reactor. When the light hydrocarbon is not recycled, the gas (C) is returned2~C4Gas), the riser reactor may be used as a transfer pipe for the regenerated catalyst, and may be used for transferring the regenerated catalyst, and the transfer medium is preferably steam.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the reactor is a fluidized bed reactor;
the invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: and 3) removing the entrained catalyst from the reaction product in the step 3) through a reactor three-stage cyclone separator and a reactor four-stage cyclone separator, leading out, and sending to a rear quenching and water washing system after heat exchange. The catalyst recovered by the reactor three-stage cyclone separator and the reactor four-stage cyclone separator enters a reactor three-cyclone recovery catalyst storage tank, and the waste catalyst is sent to a waste catalyst tank through a discharging agent pipeline.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: and 4) removing most of carried catalyst from the flue gas generated after the catalyst and main air are contacted and burned in a countercurrent mode through a two-stage cyclone separator, discharging the flue gas, sending the flue gas to a waste heat boiler through a pressure reducing valve (if needed), a double-acting slide valve and a pressure reducing pore plate to recover heat, and exhausting the flue gas to atmosphere through a chimney.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: and 4) a stripping grating or a stripping baffle plate and a stripping medium distribution ring are arranged in the spent stripper.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the reactor is provided with an internal heat-taking facility and an external heat-taking facility, and the external heat-taking facility is arranged outside the regenerator.
The invention relates to a device for preparing gasoline from oxygen-containing compounds, which is further characterized in that: the regenerator is a fluidized bed regenerator, preferably a turbulent fluidized bed regenerator.
The regeneration mode of the catalyst in the regenerator can adopt incomplete regeneration or complete regeneration, and preferably adopts incomplete regeneration.
The method for preparing the gasoline by the oxygen-containing compound can be used for industrial production of liquid products by converting the oxygen-containing compound, such as: MTA process (methanol to aromatics process), MTG process (methanol to gasoline process), and the like. The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the raw material of the reactor is an oxygen-containing compound single feed or a mixed feed of the oxygen-containing compound and light hydrocarbon return gas.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the oxygen-containing compound is an oxygen-containing compound mainly comprising methanol or dimethyl ether, and the light hydrocarbon return gas is C2-C4 gas.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: a light hydrocarbon return gas injection port is arranged on the oxygen-containing compound feed pipeline, and light hydrocarbon return gas and the oxygen-containing compound are mixed and then enter the reactor; light hydrocarbon return gas can also be injected into the riser reactor, and the light hydrocarbon return gas can be injected into the upper part, the middle part or the lower part of the riser reactor by one strand or multiple strands.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the reaction temperature is within the range of 250-650 ℃, preferably within the range of 300-500 ℃; the regeneration temperature is in the range of 350-700 ℃, preferably 450-650 ℃; the reaction pressure is in the range of 0.1-3.0 MPaG, preferably in the range of 0.1-2.0 MPaG; the regeneration pressure is in the range of 0.1-3.0 MPaG, preferably in the range of 0.1-2.0 MPaG.
The invention relates to a method for preparing gasoline by using oxygen-containing compounds, which is further characterized by comprising the following steps: the temperature of the reactor three-stage cyclone separator is within the range of 300-600 ℃, preferably within the range of 400-500 ℃; the pressure is in the range of 0.1 to 3.0MPaG, preferably in the range of 0.4 to 2.0 MPaG.
The device for preparing gasoline from oxygen-containing compounds better solves the problems of high catalyst bed height, difficult catalyst fluidization, difficult heat extraction and poor selectivity in the prior art, and can be used in the industrial production of liquid products prepared by converting oxygen-containing compounds, such as MTG (methanol to gasoline) process. In addition, the equipment has the advantages of simple structure, easy realization, wide application range, low equipment investment and the like, and can be widely applied to devices for preparing liquid products by converting oxygen-containing compounds.
Compared with the prior art, the invention has the advantages that:
(1) the device provided by the invention can improve the selectivity of target products, such as the selectivity and yield of gasoline products to the maximum extent;
(2) by adopting the device provided by the invention, the problems of high bed layer and difficult fluidization of the catalyst in the reactor and the regenerator are solved, and the fluidization state is maintained;
(3) the device provided by the invention can meet the requirements of reaction regeneration conditions of the MTG process. Namely, the reaction gas has long retention time, the catalyst has long retention time and the catalyst has low circulation volume. The reaction condition and the regeneration condition can be effectively controlled, the problem of reaction heat extraction caused by high pressure and strong heat release is solved, and the heat balance of the device can be realized. Simple operation and low equipment investment.
The invention is further described with reference to the following figures and detailed description. But not to limit the scope of the invention.
Drawings
FIG. 1 is a diagram of an apparatus for producing gasoline from an oxygenate according to the present invention.
The reference symbols shown in the figures are: 1-riser reactor, 2-light hydrocarbon return gas, 3-raw material feeding pipe, 4-external heat remover, 5-external heat removal inlet pipe, 6-reactor internal heat removal facility, 7-reactor dense phase section, 8-reactor transition section, 9-reactor dilute phase section, 10-reactor gas-solid separation facility, 11-waste catalyst, 12-reactor triple-rotation recovery catalyst storage tank, 13-reaction gas four-stage cyclone separator, 14-reactor four-stage cyclone separator outlet gas, 15-reaction gas three-stage cyclone separator, 17-oil gas, 18-oil gas collection chamber, 19-spent agent inlet pipe, 20-flue gas, 21-regenerator gas-solid separation facility, 22-regenerator, 23-regenerator dilute phase section, 24-a regenerator transition section, 25-a regenerator coking section, 26-a regenerator external heat taking inlet and outlet, 27-a regenerator external heat taking device, 28-main air, 29-conveying gas or raw materials, 30-a regeneration slide valve, 31-a spent slide valve, 32-a spent agent conveying pipe, 33-a spent stripper, 34-a feeding distributor II, 35-a main air distributor, 36-a feeding distributor I, 37-a reactor and 38-a regenerated catalyst conveying pipe.
Detailed Description
As shown in fig. 1, an apparatus for producing gasoline from an oxygen-containing compound includes a riser reactor 1, a reactor 37, a regenerator 22, a reactor third-stage cyclone 15, a reactor fourth-stage cyclone 13, a reactor third-stage catalyst recovery storage tank 12, a spent stripper 33, an external heat remover 4, and an external heat remover 27. The reactor 37 is communicated with the riser reactor 1, the spent stripper 33, the external heat remover 4 and the reactor tertiary cyclone separator 15; one end of the riser reactor 1 is communicated with the reactor 37, and the other end is communicated with the regenerator 22 through a regeneration slide valve 30; the regenerator 22 is in communication with the riser reactor 1, an external regenerator 27, and a spent catalyst transfer line 32.
The reactor 37 and the regenerator 22 are arranged in parallel, and the reactor 37 is higher than the regenerator 22; the first feeding distributor 36 and the second feeding distributor 34 are arranged at the bottom of the reactor 37, and raw materials are introduced into the feeding distributors through the raw material feeding pipes 3 for distribution.
One end of the spent stripper 33 is communicated with the bottom of the reactor 37 through a spent agent inlet pipe 19, and the other end is communicated with the regenerator 22 through a spent agent conveying pipe 32. The reactor 37 is internally provided with a reactor gas-solid separation facility 10. The regenerator 22 is internally provided with a regenerator gas-solid separation facility 21. The regenerator 22 is provided with a regenerator external heat remover 27 which is communicated with the regenerator 22 through a regenerator external heat removal inlet 26; the reactor 37 is provided with internal and external heat-taking means, preferably the internal heat-taking means 6. The external heater 4 is communicated with the reactor 37 through an external heat outlet inlet pipe 5.
The interior of reactor 37 is divided from top to bottom into a reactor dilute phase section 9, a reactor transition section 8 and a reactor dense phase section 7. The top of the reactor 37 is provided with an oil gas collection chamber 18, and the reaction oil gas 17 is introduced into the oil gas collection chamber 18 through the reactor gas-solid separation facility 10.
The regenerator 22 is internally divided into a regenerator dilute phase section 23, a regenerator transition section 24 and a regenerator char section 25. The regenerator char section 25 may be a turbulent bed or a fast bed or a combination of both. The regenerator dilute phase section 23 is provided with a regenerator gas-solid separation facility 21, the top of the regenerator dilute phase section is provided with a flue gas 20 outlet, the regeneration scorching section 25 is provided with a main air distributor 35, and the bottom of the regenerator is provided with a main air 28 inlet. A regeneration slide valve 30 is provided in the regenerated catalyst transfer pipe 38, and an injection port for the transfer gas or raw material 29 is provided in the riser reactor 1. Preheating oxygen-containing compounds mainly comprising methanol or dimethyl ether and light hydrocarbon return gas 2, then entering a first feeding distributor 36 in a reactor 37 from a raw material feeding pipe 3, directly contacting the oxygen compounds in the reactor 37 with a high-temperature regenerated catalyst from a riser reactor 1, and rapidly reacting under the action of the catalyst; and a part of preheated oxygen-containing compounds mainly containing methanol or dimethyl ether also enter a second feeding distributor 34 of the reactor 37 for reaction, most of carried catalyst is removed from reaction products through a gas-solid separation facility 10 of the reactor, the carried catalyst is removed through a third cyclone separator 15 of the reactor and a fourth cyclone separator 13 of the reactor, the reaction products are led out, and the reaction products are sent to a rear quenching and water washing system after heat exchange. The reactor gas-solid separation facility 10 is a two-stage cyclone separator.
The catalyst recovered by the reactor three-stage cyclone separator 15 and the reaction gas four-stage cyclone separator 13 enters a reactor three-stage recovery catalyst storage tank 12, and the waste catalyst 11 enters a waste catalyst tank through a discharging pipeline.
The spent catalyst enters a spent stripper 33 for stripping, and a stripping grid or a stripping baffle plate and a stripping medium distribution ring are arranged in the spent stripper 33. The device is used for stripping reaction gas carried by spent catalyst, and the stripped spent catalyst enters a spent agent conveying pipe 32 after passing through a spent slide valve 31 and then enters the regenerator 22. After the catalyst is burnt by countercurrent contact with main air 28 in a regenerator 22, the regenerated catalyst enters a riser reactor 1 through a regeneration slide valve 30 and firstly reacts with light hydrocarbon return gas (C2-C4 gas), and then enters a reactor 37 to continuously react with oxygen-containing compounds. The regenerated flue gas 20 is passed through a regenerator gas-solid separation facility 21 to remove most of the carried catalyst, then passed through a pressure reducing valve (if necessary), a double-acting slide valve and a pressure reducing orifice plate, and then sent to a waste heat boiler to recover heat, and then discharged to atmosphere through a chimney.
Raw materials respectively enter different feeding distributors of the reactor according to reaction requirements, and enter the feeding distributors of the reactor36 can be light hydrocarbon return gas 2 (C)2~C4Gas), oxygen-containing compounds such as methanol and dimethyl ether, or a mixture of both. Light hydrocarbon return gas 2 (C) can also enter the second reactor feeding distributor 342~C4Gas), oxygen-containing compounds such as methanol and dimethyl ether, or a mixture of both. Oxygen-containing compounds are preferred. Preferably light hydrocarbon return gas 2 (C) entering the riser reactor 12~C4Gas). The light hydrocarbon return gas 2 can be injected into the upper, middle or lower portion of the riser reactor 1 in one or more streams. When light hydrocarbon is not recycled, the gas 2 (C) is returned2~C4Gas), riser reactor 1 may be used to transport the regenerated catalyst, with transport gas 29 preferably being steam.

Claims (27)

1. The method for preparing the gasoline by the oxygenated chemicals is characterized by comprising the following steps:
1) light hydrocarbon return gas is preheated and then injected into the upper part, the middle part or the lower part of the riser reactor in one or more strands, and is directly contacted with a high-temperature catalyst from a regenerator in the riser reactor to rapidly react under the action of the catalyst, and a reaction product enters a fluidized bed reactor; raw materials are introduced into a feeding distributor through a raw material feeding pipe to be distributed; a light hydrocarbon return gas injection port is arranged on the raw material feeding pipeline, and light hydrocarbon return gas enters the reactor independently or together with the oxygen-containing compound after being mixed;
2) the method comprises the following steps that (1) reaction raw materials enter the bottom of a fluidized bed reactor through a feeding distributor I after being preheated, oxygen-containing compounds in the fluidized bed reactor are directly contacted with a high-temperature catalyst from a riser reactor, and the reaction is rapidly carried out under the action of the catalyst;
3) preheating reaction raw materials, feeding the preheated reaction raw materials into the lower part of the fluidized bed reactor through a second feeding distributor for reaction, removing most of carried catalyst from reaction products entering the fluidized bed reactor in the step 2) through a gas-solid separation facility of the fluidized bed reactor, removing the carried catalyst through a third-stage cyclone separator of reaction gas and a fourth-stage cyclone separator of reaction gas, and leading out;
4) is lost after reactionThe active spent catalyst enters a spent stripper for stripping reaction gas carried by the spent catalyst, and the stripped spent catalyst enters a regenerator through a spent conveying pipe; after the spent catalyst and main air are in countercurrent contact and burnt in the regenerator, the regenerated catalyst enters the riser reactor through the regeneration slide valve and reacts with light hydrocarbon return gas firstly, and the light hydrocarbon return gas is C2～C4The gas enters a reactor to continuously react with the oxygen-containing compound; the riser reactor also serves as a regenerated catalyst transfer pipe for transferring the regenerated catalyst.
2. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the reaction raw material entering the feeding distributor I is an oxygen-containing compound single feeding material or a mixed feeding material of the oxygen-containing compound and light hydrocarbon return gas; the reaction raw material entering the second reactor is an oxygen-containing compound and/or light hydrocarbon return gas.
3. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the oxygen-containing compound is an oxygen-containing compound mainly containing methanol or dimethyl ether.
4. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: removing the entrained catalyst from the reaction product obtained in the step 3) by a reaction gas three-stage cyclone separator and a reaction gas four-stage cyclone separator, leading out, and sending to a rear quenching and water washing system after heat exchange; the catalyst recovered by the reaction gas three-stage cyclone separator and the reaction gas four-stage cyclone separator enters a reactor three-cyclone recovery catalyst storage tank, and the waste catalyst is conveyed to a waste catalyst tank through a discharging agent pipeline.
5. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: and 4) removing most of carried catalyst from the regenerated flue gas in the step 4) through a two-stage cyclone separator, discharging, sending the flue gas to a waste heat boiler through a pressure reducing valve, a double-acting slide valve and a pressure reducing pore plate to recover heat, and discharging the flue gas to atmosphere through a chimney.
6. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the regenerator is a fluidized bed regenerator.
7. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the fluidized bed reactor is provided with an inner heat collector and an outer heat collector, and the outer part of the regenerator is provided with an outer heat collector.
8. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the reaction temperature is within the range of 250-650 ℃; the regeneration temperature is in the range of 350-700 ℃; the reaction pressure is in the range of 0.1-3.0 MPaG; the regeneration pressure is in the range of 0.1-3.0 MPaG.
9. The method of producing gasoline from an oxygenate according to claim 8, wherein: the reaction temperature is within the range of 300-500 ℃; the regeneration temperature is in the range of 450-650 ℃; the reaction pressure is in the range of 0.1-2.0 MPaG; the regeneration pressure is in the range of 0.1-2.0 MPaG.
10. The method of producing gasoline from an oxygenate according to claim 1, characterized in that: the temperature of the reaction gas three-stage cyclone separator is within the range of 400-500 ℃; the pressure is in the range of 0.4 to 2.0 MPaG.
11. The application device of the method for preparing gasoline from oxygen-containing compound according to any one of claims 1 to 10, comprising a fluidized bed reactor, a riser reactor, a regenerator and a spent stripper, characterized in that: the regenerator is connected with the riser reactor through a regeneration slide valve, and the riser reactor extends into the fluidized bed reactor; an inner heat collector is arranged inside the fluidized bed reactor, and an outer heat collector is arranged outside the fluidized bed reactor; 2-5 layers of feeding distributors are arranged in the fluidized bed reactor, and raw materials are fed into the fluidized bed reactor in multiple strands for reaction; the spent stripper is respectively communicated with the bottom of the fluidized bed reactor and the bottom of the regenerator; the fluidized bed reactor and the regenerator are arranged in parallel; the riser reactor is also used as a regenerated catalyst conveying pipe; light hydrocarbon return gas is injected into the upper part, the middle part or the lower part of the riser reactor in one or more strands after being preheated.
12. The application device according to claim 11, wherein: and the lower part in the fluidized bed reactor is provided with two layers of feeding distributors, namely a feeding distributor I and a feeding distributor II.
13. The application device according to claim 11, wherein: the feeding distributor is a distribution pipe or a distribution plate.
14. The application device according to claim 11, wherein: one end of the spent stripper is communicated with the bottom of the reactor through a spent agent inlet pipe, the other end of the spent stripper is communicated with the regenerator through a spent agent conveying pipe, and a slide valve is arranged on the spent agent conveying pipe.
15. The application device according to claim 14, wherein: the spent stripper is internally provided with a stripping grating or a stripping baffle and a stripping medium distributor.
16. The application device according to claim 11, wherein: the interior of the fluidized bed reactor is divided into a reactor dilute phase section, a reactor transition section and a reactor dense phase section from top to bottom.
17. The application device according to claim 16, wherein: the fluidized bed reactor is internally provided with a gas-solid separation facility, the top of the fluidized bed reactor is provided with an oil gas collection chamber, and the gas-solid separation facility is introduced into the oil gas collection chamber.
18. The application device according to claim 11, wherein: the gas-solid separation facility is a primary cyclone separator and a secondary cyclone separator, and the secondary cyclone separator is introduced into the oil gas collection chamber.
19. The application device according to claim 11, wherein: and a third cyclone separator is arranged outside or inside the fluidized bed reactor, and the reaction gas third cyclone separator is vertical or horizontal.
20. The application device according to claim 11, wherein: and a reaction gas four-stage cyclone separator is arranged outside the fluidized bed reactor, one end of the reaction gas four-stage cyclone separator is communicated with the reaction gas three-stage cyclone separator, and the other end of the reaction gas four-stage cyclone separator is communicated with a reactor three-cycle recovered catalyst storage tank.
21. The application device according to claim 11, wherein: the regenerator is a fluidized bed regenerator, and the regenerator is internally divided into a regenerator dilute phase section, a regenerator transition section and a regenerator coking section.
22. The application device according to claim 21, wherein: the dilute phase section of the regenerator is provided with a gas-solid separation device, the top of the dilute phase section is provided with a flue gas outlet, the regeneration and burning section is provided with a main air distributor, and the bottom of the regenerator is provided with a main air inlet.
23. The application device according to claim 22, wherein: the main wind distributor is a distribution pipe and/or a distribution plate.
24. The application device according to claim 22, wherein: the gas-solid separation device in the regenerator is a cyclone separator, and the cyclone separator is 1-3 grade.
25. The application device according to claim 11, wherein: the heat remover in the fluidized bed reactor is arranged at the middle lower part of the reaction section of the fluidized bed reactor and above the feeding distributor of the reactor.
26. The application device according to claim 11, wherein: an external heat collector is arranged in the regenerator.
27. The application device according to claim 11, wherein: the fluidized bed reactor and the regenerator are both high beds, and the ratio of the height of the catalyst bed layer at the dense-phase section of the fluidized bed reactor to the diameter of the dense-phase section of the fluidized bed reactor is 0.5-20.0; the ratio of the height of the catalyst bed in the dense-phase section of the regenerator to the diameter of the dense-phase section of the regenerator is 0.5 to 30.0.
CN201810888048.9A 2018-08-07 2018-08-07 Device and method for preparing gasoline from oxygen-containing compound Active CN110819374B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202754917U (en) * 2012-07-09 2013-02-27 中国石油化工集团公司 Device for producing low carbon olefin from oxy-compound
CN105018129A (en) * 2014-04-18 2015-11-04 中石化洛阳工程有限公司 Device and method for producing gasoline from methyl alcohol by fluidized bed
CN107963957A (en) * 2016-10-19 2018-04-27 中国科学院大连化学物理研究所 A kind of method and its device for preparing propylene and C4 hydro carbons

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202754917U (en) * 2012-07-09 2013-02-27 中国石油化工集团公司 Device for producing low carbon olefin from oxy-compound
CN105018129A (en) * 2014-04-18 2015-11-04 中石化洛阳工程有限公司 Device and method for producing gasoline from methyl alcohol by fluidized bed
CN107963957A (en) * 2016-10-19 2018-04-27 中国科学院大连化学物理研究所 A kind of method and its device for preparing propylene and C4 hydro carbons

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