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Method for producing white spirit base by recycling ethanol from waste yeast dried steam

A waste yeast and alcohol technology, applied in the preparation of alcoholic beverages, etc., can solve problems such as environmental pollution and waste of resources, and achieve the effect of reducing environmental pollution

Inactive Publication Date: 2008-08-20
QILU UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, during the drying process of yeast, a large amount of waste steam will be produced, which contains about 4.5% (v / v) of alcohol, which is discharged into the air, which not only pollutes the environment but also causes a waste of resources, which should attract the attention of enterprises
But at present, no domestic enterprises have conducted research in this area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0028] Embodiment: a method for recovering alcohol from the dried steam of spent yeast to prepare liquor base, the steps are as follows:

[0029] 1) Surface cooler condensation

[0030] The beer yeast mud is dried by a roller dryer to produce a large amount of alcohol-containing steam. The steam enters the surface cooler at a flow rate of 400kg / h to condense. The inlet temperature is 100°C, the condensate temperature is 72°C, and the recovered alcohol concentration is 0.5% ( / v), the inlet water temperature is 18°C, and the outlet water temperature is 58°C. The surface cooler adopts three pieces connected in series, and each piece is composed of steel tubes and aluminum finned tube bundles. The model is SRT-6×6 / 2, and the heat exchange area is 15.6m 2 , the number of tube bundles is 27.

[0031] 2) Tube and tube heat exchanger condensation

[0032] The uncondensed steam condensed by the surface cooler enters the shell and tube heat exchanger to continue to condense, the inl...

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Abstract

The invention provides a method for recycling alcohol from dried steam of waste yeast to prepare base of liquor, belonging to the technical field of brewing, which comprises surface air cooler condensation, tubular heat exchanger condensation, the absorption of absorption tower, crude process of alcohol, refining of alcohol, and post treatment of alcohol. Beer yeast slurry produces large amount of steam containing alcohol by the drying of a roller dryer, the steam enters a surface air cooler to condense most of water, the uncondensed steam enters a tubular heat exchanger to condense most of alcohol, and the rest uncondensed steam enters an absorption tower to be absorbed by water. After mixing the recycled alcohol-water blend, continuous distillation by a topping still is adopted to remove impurity and improve alcohol concentration, and batch distillation by the hog still is adopted for further refining, thereby acquiring high-quality liquor base used for blending liquor. The method recycles alcohol by three steps, and the recovery rate is up to 100 percent; by using the recycled alcohol to prepare liquor base, food resources are fully used, environmental pollution is reduced and economic benefits of enterprises are increased.

Description

technical field [0001] The invention relates to a method for preparing liquor base by recovering alcohol from steam dried by waste yeast, and belongs to the technical field of brewing. Background technique [0002] During the brewing process of beer, a large amount of by-products of yeast sludge will be produced. For a beer company with an annual production scale of 100,000 tons, the waste yeast sludge can reach 2,000 tons. At present, the treatment of waste yeast by most domestic beer companies is to directly dry the waste yeast to produce yeast powder. However, during the drying process of yeast, a large amount of waste steam will be produced, which contains about 4.5% (v / v) alcohol, which is discharged into the air, which not only pollutes the environment but also causes waste of resources, which should attract the attention of enterprises. But at present, there is no domestic enterprise conducting research in this area. Contents of the invention [0003] Aiming at th...

Claims

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Application Information

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IPC IPC(8): C12G3/12C12H6/02
Inventor 周广田徐玲
Owner QILU UNIV OF TECH
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