Method and system for separating ethanol based on sweet sorghum stalk solid ferment material

Abstract

The invention relates to a method for separating ethanol by using Chinese sorghum straw through solid fermentation method and the system, belonging to field of ethanol produ ction process through solid fermentation. It comprises following steps: disintegrating Chinese sorghum straw, solid fermenting and getting fermentation material, conveying it to distilling system through compact channel conveybelt; feeding fermentation material into annular rotary disk, contacting with steam from high- efficiency gas distributor to make ethanol converse into gas phase from solid phase, discharging slag continuously; separating ethanol with distilling- rectifying coupled process, getting industrial ethanol of 95.5% (w / w). The ethanol productivity is increased by employing istilling- rectifying coupledprocess, the ethanol volatilisation is dramatically reduced during conveying process by employing compact channel blet convey; the transiation is improved and continuous production is realized by employing annular rotary disk for solid distillation.

Description

technical field [0001] The invention relates to a distillation-rectification coupling method and system for separating ethanol from solid-state fermentation materials, in particular to a technology and equipment for separating ethanol based on solid-state distillation-rectification coupling of sweet sorghum stalk fermentation materials, which belongs to the production of ethanol by solid-state fermentation technology field. Background technique [0002] Stepping into the 21st century, in order to achieve sustainable and coordinated development of energy, environment and economy, all countries in the world including China are committed to the development of renewable energy to accelerate the pace of energy structure adjustment. Therefore, the development of renewable biomass energy is of great strategic significance. Fuel ethanol is the largest biofuel in the world. Our country is rich in resources for producing fuel ethanol, and it is the first choice for the development of...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the shortcomings of high raw material pretreatment cost and long fermentation period in the liquid fermentation route of sweet sorghum ethanol production, and the low efficiency of brewing process in the traditional solid-state fermentation route. Based on the solid-state distillation and rectification integrated process of the closed ring porous rotating disc, ethanol is continuously separated from the solid-state fermentation material, the actual yield of ethanol is increased, and energy consumption is reduced, and then it is matched with post-processing units such as molecular sieve dehydration to realize sweet sorghum Commercial operation of a new process for the production of fuel ethanol by solid-state fermentation of stems

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