Reactor for preparing dimethyl ether from synthesis gas by one-step method

The utility model discloses a reactor for preparing dimethyl ether from synthesis gas by a one-step method, and belongs to the technical field of dimethyl ether preparation devices. A barrel of the reactor is divided into an upper part and a lower part by a partition plate, which are connected by a central line pipe. And the water-cooling heat exchanger is used for taking away redundant reaction heat when the synthesis gas is used for synthesizing methanol in the methanol synthesis area. And the lower part is a DME synthesis area, and heat released by the reaction exchanges heat with synthesis gas conveyed by the central line pipe, so that the synthesis gas entering a DME synthesis catalyst layer is heated, and meanwhile, a large amount of heat released during DME synthesis is taken away. And the temperature of the DME catalyst bed layer is effectively balanced, so that the DME catalyst is protected from being sintered, and the service life of the catalyst is prolonged. 一种合成气一步法制备二甲醚的反应器，其属于二甲醚制备装置的技术领域。该反应器的