Reactor for synthesizing dimethyl ether by biomass synthesis gas through one-step method and temperature control system

Abstract

The invention discloses a reactor for one-step preparation of dimethyl ether from biomass syngas, which comprises a fixed bed reactor, a plurality of reaction tubes are parallelly distributed in the reactor along the longitudinal direction; a reaction gas inlet is arranged at the top end of the fixed bed reactor, an exhaust outlet is arranged on a shell pass of the reactor which is near to the top end, overheated water outlets are arranged at the two sides of the reactor which are near to the exhaust outlet; a reaction gas outlet is arranged at the bottom end of the fixed-bed reactor, a liquid drainage port is arranged on the shell pass of the reactor which is near to the bottom end, and overheated water inlets are arranged on the two sides of the reactor which are near to the liquid drainage port. The reactor overcomes the shortcoming that the traditional fixed bed reactor is difficult to enlarge due to the thermal transfer limitation, makes full use of the advantages of high conversation efficiency, simple operation, good stability, low investment, low system maintenance cost, and the like of the fixed-bed reactor, designs a one-step dimethyl ether synthesis device with the larger scale and rapidly promotes the marketization of the technology of synthesizing liquid fuel from the biomass syngas.

Description

technical field [0001] The invention provides a reactor system for preparing high-grade liquid fuel from biomass synthesis gas, in particular to a reactor for one-step production of dimethyl ether from biomass synthesis gas and a precise temperature control system thereof. Background technique [0002] Dimethyl ether is a chemical product with a wide range of uses. It can replace chlorofluorocarbons as aerosol sprays and environmentally friendly refrigerants. It is also an important raw material for the production of low-carbon olefins. Studies in recent years have shown that DME can be directly used as fuel as a substitute for liquefied petroleum gas and diesel. Therefore, the potential market for DME is undoubtedly huge. [0003] At present, the industrial production of DME mainly adopts methanol catalytic dehydration process, which has a small scale and high production cost. The large-scale production of DME should adopt the direct conversion process of synthesis gas. ...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the heat transfer limitation of the dimethyl ether fixed bed reactor and its temperature control integrated process system. Problems that are

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