V. V. Ananskikh, N. D. Lukin
All-Russian Research Institute of Starch Products – the branch of the V. M. Gorbatov Federal Science Center of Food Systems of the RAS, ul. Nekrasova, 11, pos. Kraskovo, Lyuberetskii r-n, Moskovskaya obl., 140051, Russian Federation
Abstract. Most of the domestic enterprises producing starch syrup are equipped with installations for the continuous acid hydrolysis of starch where starch liquefaction, its hydrolysis, and neutralization of acid syrup are made. Liquefaction occurs in a circulation loop where acidified starch suspension continuously mixes up with 6–9 parts of hot (120 C) diluted solution, then the product is heated up to 135 C and goes to a holder unit for 3–4 min to be cleaved. The received starch syrup is neutralized with soda solution and blown out into the evaporator where the temperature decreases instantly. Installations are supplied with two heat exchangers being as jet or jacket-tube heaters. When using the jet heaters the amount of dry solids (DS) in the neutralized starch syrup is over 36%, but for the jacket-tube heat exchangers the DS content in the syrup exceeds 43%. When the temperature of the starch suspension going for the hydrolysis is increased from 20 to 50 C, the steam consumption for this procedure reduced by more than 18%. The capacity of a continuous starch hydrolysis unit for a plant can be increased from 200 tons of syrup per day to 250 tons per day by raising the temperature of the starch suspension to 50 C before saccharification. The improvement of the design of the installation for continuous conversion of starch allows to increase the production capacity of a plant with minimum expenses, reduce steam consumption and increase the neutralized syrup concentration.
Keywords: continuous conversion of starch; jet heaters; jacket-tube heat exchangers; steam consumption.
Author Details: V. V. Ananskikh, Cand. Sc. (Tech.), head of laboratory (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); N. D. Lukin, D. Sc. (Tech.), director.
For citation: Ananskikh V. V., Lukin N. D. Improvement of the Construction of an Installation for Continuous Hydrolysis of Starch. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 7. Pp. 80–82 (in Russ.). DOI: 10.24411/0235-2451-2018-10719.