Fermentation / distillation integrated technique apparatus for producing alcohol from sugar

A fuel ethanol and sugar technology, which is applied in biochemical cleaning devices, enzymology/microbiology devices, bioreactor/fermenter combinations, etc., can solve the problem of high energy consumption, low efficiency and difficulty in mechanization of juice pretreatment. and other problems, to achieve the effect of enhancing the migration of bacteria, simplifying the process flow, and reducing the loss of volatilization.

Inactive Publication Date: 2009-08-12
TSINGHUA UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to fundamentally solve the problems of high energy consumption, long fermentation period, serious environmental pollution and the traditional solid-state fermentation process of high labor intensity in the liquid fermentation method of juicing pretreatment in the current

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  • Fermentation / distillation integrated technique apparatus for producing alcohol from sugar

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Embodiment 1

[0027] A retort device (13.7 cm in height, 15.7 cm in diameter) was used to separate ethanol from the solid fermentation material of sweet sorghum stalk by gas (steam) stripping. Experiments were carried out on different amounts of fermented materials by using the gradient feeding method, and the optimal filling height and heat medium (dry hot air, CO 2 and 3.5kg / cm 2 Superheated steam) flow rate, wine gas (steam) is collected after condensing through the spiral plate heat exchanger. For example, under optimized working conditions, 300-600g of fermentation material (water concentration 70-85%, ethanol mass concentration 5-10%) is added in a single batch, and dry hot air is used as the heating medium, and the temperature is 85-95 ℃. The stripping time is 40-80 minutes, the volume concentration of ethanol in the gas-phase condensate is 15-35%, the volume concentration of ethanol in the slag is lower than 0.5%, and the actual ethanol yield is in the range of 88-95%.

Embodiment 2

[0029] In the self-developed 50L horizontal drum solid-state fermentation / distillation integrated device (diameter 300mm, length 700mm), multiple batches of tests were carried out on the continuous gas (steam) stripping of ethanol in the fermentation material and the drying of the slag. The rotary joint realizes the continuous entry and exit of the gaseous heat medium during the rotation of the fermenter cylinder. For example, sweet sorghum stalk solids are fermented with hot CO 2 Recover ethanol for the stripping medium, solid fermentation material (water concentration filling coefficient is 0.3~0.7, flow rate is 2~8L / min, temperature is 80~105 ℃, ethanol vapor is condensed through spiral plate high-efficiency heat exchanger, and stripping time is 90 ~120min, the volume concentration of ethanol in the condensate is 10~60%, the volume concentration of ethanol in the slag is lower than 0.2%, and the actual ethanol yield is 85~94%. Continue to heat CO 2(Simulated flue gas) is a...

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Abstract

The invention discloses an integral fuel-ethanol production process based on saccharide raw materials, and a device thereof, which belongs to the technical field of biomass liquid fuel production. The technical process comprises the following steps: grinding saccharide crops and allowing the ground saccharide crops to enter a device integrating solid-state fermentation, ethanol gas extraction and pneumatic dregs drying; mixing the ground material with high-yield ethanol yeast liquid and completing fermentation in anaerobic environment under the condition of transmitting strengthening heat mass; separating the ethanol through gas extraction; and drying dregs rotated in a tube body of a fermentor through gas flow and discharging the dregs out of the fermentor. The invention has the advantages of simplifying the process flow of producing the ethanol through solid fermentation, realizing high-degree technical integration, transforming fermentable sugar in the ground material to the utmost extent, efficiently extracting the ethanol in solid fermentation materials, utilizing flue gas and superheated steam (CO2 or heated dry air) to separate the ethanol, utilizing the flue gas (or the heated dry air) to dry the dregs, saving material-conveying time, reducing energy consumption and embodying that a solid fermentation method for producing fuel ethanol has the advantages of high net energy ratio and low environmental load.

Description

technical field [0001] The invention belongs to the technical field of biomass liquid fuel production, and in particular relates to an integrated process and device for producing fuel ethanol based on solid-state fermentation of sugar crops (sweet sorghum, sugar cane, sugar beet, Jerusalem artichoke, etc.), alcohol-slag stripping and slag airflow drying . Background technique [0002] It is internationally recognized that only biofuels can replace traditional fossil fuels on a large scale in the field of transportation. At this stage, the world's largest output of fuel ethanol is also the first choice for the development of biomass energy. Grain ethanol is not suitable for my country's national conditions, and the agricultural and forestry biomass resources that can replace grain to produce ethanol are very rich, with an annual reserve of 700 million tons. However, there are still technical bottlenecks in cellulosic ethanol conversion technology, and it is difficult to achi...

Claims

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Application Information

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IPC IPC(8): C12P7/10C12M1/00C07C29/80C10L1/02A23K1/12C10L5/44C12R1/645A23K10/32
CPCY02E50/16Y02E50/30Y02E50/10C12M21/12C12M21/16C12M33/20
Inventor 李十中李天成
Owner TSINGHUA UNIV
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