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Process and device for continuously separating ethanol from solid state fermentation materials

A technology for fermentation material and fuel ethanol, applied in fermentation, biofuel and other directions, can solve the problems of continuous production of alcohol distillation process and other problems, and achieve the effects of stable product quality, energy saving, consumption reduction and production cost reduction, and stable concentration.

Active Publication Date: 2013-10-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the difficulty in continuous production of the solid-state fermentation material steaming alcohol process, and the problem that continuous production efficiency and energy saving cannot be achieved at the same time, the present invention aims at the characteristics of material flow, combined with the characteristics of distillation process operation, and refers to the drying principle and Its equipment proposes a process and device for continuous separation of fuel ethanol from solid-state fermentation materials

Method used

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  • Process and device for continuously separating ethanol from solid state fermentation materials

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Feed 0.4MPa water vapor into the steam pipeline in the device. After stabilization, input the sweet sorghum stalk solid fermented material into the device at a speed of 5t / h. The ethanol content in the fermented material is 3% (volume fraction), adjust the rotating shaft speed The residence time of the fermented material in the device is 15 minutes, the accumulation height of the fermented material on the heating plate is maintained at 50-100 mm, and the reflux ratio is adjusted to 0.1. After the system was stabilized, the distilled slag was taken for ethanol content analysis, and the results showed that the recovery rate of ethanol was 99.3%.

Embodiment 2

[0038] Feed 0.4MPa water vapor into the steam pipeline in the device. After stabilization, input the sweet sorghum stalk solid fermentation material into the device at a speed of 3t / h. The ethanol content in the fermentation material is 5% (volume fraction), and adjust the rotation speed of the rotating shaft. The residence time of the fermented material in the device is 25 minutes, the accumulation height of the fermented material on the heating plate is maintained at 50-100 mm, and the reflux ratio is adjusted to 0.3. After the system was stabilized, the distilled slag was taken for ethanol content analysis, and the results showed that the recovery rate of ethanol was 99.6%.

Embodiment 3

[0040] Feed 0.4MPa water vapor into the steam pipeline in the device. After stabilization, input the sweet sorghum stalk solid fermented material into the device at a speed of 2t / h. The ethanol content in the fermented material is 7% (volume fraction), adjust the rotating shaft speed The residence time of the fermented material in the device is 35 minutes, the accumulation height of the fermented material on the heating plate is maintained at 50-100 mm, and the reflux ratio is adjusted to 0.5. After the system was stabilized, the distilled slag was taken for ethanol content analysis, and the results showed that the recovery rate of ethanol was 99.1%.

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Abstract

The invention belongs to the technical field of biomass energy production and subsequent processing, and in particular relates to a process and a device for extracting ethanol from solid state fermentation materials. The process comprises the following steps of: feeding the solid state fermentation materials into the inlet of a continuous ethanol distillation device, uniformly distributing the materials in a rotating grid on the surface of a heating plate on the topmost layer by using a distributor, introducing saturated steam into the heating plate, indirectly heating the fermentation materials by using the heating plate, making the materials fall into a corresponding rotating grid on a heating plate on the next layer, making the materials continuously flow to the outlet of the device, and discharging from a discharging hole; and vaporizing one part of ethanol and water in the fermentation materials to form distillation gas by heating, discharging the distillation gas from an air exhaust opening above, condensing one part of distillation gas and mixing in the fermentation materials at a feeding hole to form back flow, and introducing the other part of distillation gas into a rectifying column for rectifying. By the process and the device, continuous production on an industrial scale can be realized, the distillation rate of the ethanol reaches 99.6 percent, ethanol distillation time is shortened, the stability of ethanol steam concentration is kept, labor intensity is greatly reduced, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the field of biomass energy production, the technical field of solid material fermentation and the technical field of continuous drying of solid material, and specifically relates to an extraction process and device for ethanol in solid fermented material. Background technique [0002] Fuel ethanol is a kind of biomass fuel. It is a green and renewable new energy that can replace petroleum fuel today. Because its combustion characteristics are very close to gasoline, ethanol gasoline is formed by mixing fuel ethanol with gasoline in a certain proportion. In 2009, the global production of fuel ethanol was 58.59 million tons, replacing gasoline by 5.4%, reducing 87.6 million tons of CO2 emissions 2 . Therefore, fuel ethanol has broad development space. [0003] Solid-state fermentation is one of the main methods for producing fuel ethanol. It is completed by crushing sweet sorghum stalks (including sugarcane, sugar beet, Jerusa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06
CPCY02E50/17Y02E50/10
Inventor 李十中李光明候文慧李天成
Owner TSINGHUA UNIV