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- Title
Resource- and energy-saving methods of joint use of by-products and intermediates in alcohol production.
- Authors
Bulii, Yurii; Kuts, Anatolii; Forsiuk, Andrii
- Abstract
Introduction. The aim of the work was to study and substantiate the effectiveness of energy-saving methods for the joint processing of alcohol-containing fractions in a cyclic action column, to increase the degree of alcohol purification from volatile impurities. Materials and methods. The studys was carried out in a typical impurity concentration column and an experimental cyclic action column. The liquid flow rate was monitored using constant differential pressure flowmeters, the concentration of ethyl alcohol and volatile impurities was determined by areometric and chromatographic methods, the degree of impurity emission and the multiplicity of their concentrating were determined by the calculation method. Results and discussion. The aplication of the methods proposed makes it possible to carry out joint use of by-products and intermediate products of alcohol production (head and fusel fractions) in a cyclic action rectification column equipped with scaly plates with a variable free cross-section. This alows to obtain high-quality rectified alcohol, to increase its yield by 3.8-4.0% from one tonne of notional starch or by 10.8% compared to the known method and to reduce specific vapor consumption by 40% (from 20 to 12 kg/dal of anhydrous alcohol introduced to the feed plate). Extending the contact time of steam and liquid on the column plates to 40 sec allows for complete emission of esters, increasing the degree of aldehyde recovery by 25% and the higher alcohols of fusel oil and methanol by 40%. The proposed technical solutions and selected technological modes make it possible to increase the efficiency of separation of the alcohol-containing mixture in the decanter, increase the multiplicity of concentrating of aldehydes and esters by 26%, higher fusel oil alcohols by 40%, methanol by 37%, reduce the loss of ethyl alcohol with the impurity concentrate, the amount of alcohol-containing waste, the metal consumption of technological equipment and the cost of rectified alcohol. Conclusion. The proposed methods allow the maximum purification of ethyl alcohol from head and intermediate impurities in a cyclic action rectification column, to obtain high-quality rectified alcohol, to reduce energy consumption and loss of alcohol with waste.
- Subjects
DIFFERENTIAL pressure flowmeters; ETHANOL; ALCOHOL; METHANOL as fuel; SEPARATION (Technology)
- Publication
Ukrainian Food Journal, 2022, Vol 11, Issue 3, p373
- ISSN
2304-974X
- Publication type
Article
- DOI
10.24263/2304-974X-2022-11-3-4