Process and system for producing ethanol through solid-state continuous fermentation and distillation of sorgo straws

The invention relates to a process and a system for producing ethanol through solid-state continuous fermentation and distillation of sorgo straws, wherein the process comprises a raw material pulverizing and preprocessing step, a strain adding step, a solid-state fermentation step and a solid-state distillation step; the solid-state fermentation step is continuously finished in a multilayer multisection solid-state continuous fermentation device, and the solid-state distillation step is continuously finished in a multilayer differential pressure type solid-state continuous distillation device, thereby radically overcoming the abuse that the past solid-state fermentation and distillation processes can not continuously produce, realizing continuous, mass and automated production and processing, greatly improving the production efficiency of preparing the fuel ethanol from the sorgo straws, and achieving the purposes for lowering the production cost, improving the yield and improving the economic benefit; an adopted continuous production system device is particularly suitable for industrialized large-scale production, thereby promoting the generalization and the application of a biological energy source technology.