Apparatus and method for preparing gasoline from methanol

Abstract

The invention discloses an apparatus for preparing gasoline from methanol and a method of using the apparatus to prepare gasoline from methanol through a catalytic reaction. A reaction system comprises a raw material feeding terminal, a vaporizer, a heating furnace and a fixed bed reactor. The top of the fixed bed reactor is provided with a raw material input terminal, and the bottom of the fixed bed reactor is provided with a product output terminal; at least two bed layers are vertically arranged in the fixed bed reactor, and a gas distributor is arranged between the at least two layers; the raw material feeding terminal is communicated with the vaporizer and the heating furnace; the outlet of the heating furnace is communicated with the raw material input terminal of the fixed bed reactor; and the outlet of the vaporizer is communicated with the gas distributor. A system used in conventional methods for preparing gasoline from methanol has the disadvantages of high pressure, great energy consumption and long process flow. The apparatus and method provided by the invention have the advantages of simple process, short process flow, low energy consumption in operation, low investment, few by-products and capacity of allowing the content (mass percentage) of durene in gasoline to be less than 2%.

Description

technical field [0001] The present invention relates to the technical field of methanol-to-gasoline, in particular to a methanol-to-gasoline device and method. Background technique [0002] my country has abundant coal reserves, and coal-to-methanol and methanol-to-gasoline are receiving more and more domestic attention. Gasoline made from methanol has a high octane number, good anti-knock performance, and almost no impurities such as sulfur and nitrogen, which meets the requirements of clean fuels. It has a good application prospect. [0003] The representative technology of methanol to gasoline is a two-stage conversion technology developed by MOBIL of the United States. Using ZSM-5 molecular sieve catalyst, the first stage converts methanol into dimethyl ether, and then enters the second stage reaction to produce gasoline and other products after oil and water separation. MOBIL patents include US3931349, US4579999 and US4035430 are both fixed-bed two-stage methanol-to-gas...

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Problems solved by technology

Application of fluidized bed methanol to gasoline process, easy removal of reaction heat, low content of durene in heavy oil products, improved gasoline quality, but compared with fixed bed, the yield of the target product gasoline is low

[0005] CN104099121A discloses a fluidized-bed and fixed-bed combined process method for methanol to gasoline, which not only has the advantages of convenient and timely removal of heat of reaction in the fluidized-bed process, low durene content in gasoline, but also has the advantages of high gasoline yield in the fixed-bed process Advantages, but high investment, complex operation, easy to wear catalyst

[0006] CN104099121A proposes a separation tower, which adopts multiple side line extractions to separate products. The process is simple, but the product is easy to carry water, and the diesel in the reaction product is not separated.

CN103865562A proposes a kind of separation method, adopts high fraction tank gas, liquid, water separation, liquid phase (naphtha) enters two separation towers in series successively, carries out the separation of liquefied petroleum gas, gasoline, diesel oil (C9+) step by step, the The separation effect of the method is improved, but the gas phase of the high-fraction tank is not effectively separated, and the energy consumption of the step-by-step separation is high

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