A method and system for producing hydrocarbons from methanol

Abstract

The invention relates to the field of methanol hydrocarbon preparation, and discloses a method and a system for methanol hydrocarbon preparation. The method comprises the following steps of implementing in a system comprising a fluidized bed reactor, a heat exchange device and a gasifier, exchanging the heat of raw material containing liquid methanol and the heat of process gas from the heat exchange device in the gasifier, and gasifying the methanol; exchanging the heat of gasified raw material containing methanol and the heat of process gas from the heat exchange device in the gasifier, injecting the produced process gas containing hydrocarbon into the heat exchange device, and exchanging heat; removing one part of heat produced by reaction by a heat removing device in the reactor. The invention also discloses a system for implementing the method. The method has the advantages that by adopting a fluidized bed, the reaction matter is in full contact with a catalyst, the service life of the catalyst is uniform, the activity is improved, and the yield rate of hydrocarbon is improved; the heat transfer is uniform and rapid, the coefficient is large, the reaction heat can be timely removed, and the temperature in the reactor is stable and controllable; the output of steam is increased, the additional consumption of steam is not needed, and the electric consumption is decreased.

Description

technical field [0001] The invention relates to the field of methanol-to-hydrocarbon production, in particular to a methanol-to-hydrocarbon production method and a methanol-to-hydrocarbon production system. Background technique [0002] The earliest report of methanol to hydrocarbons appeared in 1880. It was proposed by LeBel and Greene that methanol was decomposed in molten zinc chloride to obtain hexamethylbenzene, light gas (mainly methane) and water. Later people tried a variety of catalysts, including silica gel, alumina, silica and so on. Zeolites are tetrahedral porous aluminosilicate crystals whose unique crystal structure provides "shape-selective catalysis" by allowing only molecules of a specific size to pass through. Zeolites ZSM-5 and ZSM-11, especially ZSM-5, have been extensively studied in methanol to hydrocarbons and are recognized as the most effective catalysts for this reaction. The conversion of methanol on ZSM-5, the reaction path currently recognized...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the impact on the device or the catalyst activity (reducing the yield of hydrocarbons) when controlling or removing the heat of reaction in the prior art, or the defect that the device is relatively demanding or the energy consumption is large, and provides A methanol-to-hydrocarbon method and system capable of fully utilizing the heat generated during the methanol-to-hydrocarbon reaction process without significantly increasing additional consumption while increasing the hydrocarbon yield

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