Передова технологія використання гідрооксиду алюмінію на цукрових заводах України

Abstract

У статті розглянуто практичне застосування хімічних реагентів (гіпсу, сульфату алюмінію, коагулянту ГОАЕС) в процесі екстрагування сахарози з бурякової стружки в умовах цукрових заводів ряду вітчизняних компаній. Показано, що використання додаткових реагентів дає змогу підвищити ефективність сокодобування та повноту осадження нецукрів на різних технологічних стадіях. Для впровадження в умовах цукрових заводів запропоновано спосіб екстрагування сахарози з дозуванням коагулянту ГОАЕС в кількості 0,002% до м.б. The analysis of the use of physicochemical properties of reagents (gypsum, aluminium sulphate, GOAES coagulant) to reduce the content of colloid-dispersed sugars in the diffusion juice and to increase its purification efficiency at the stage of calcareous carbonation is carried out. Experimentally confirm the high efficiency of the use of complexion reagents (gypsum, aluminium sulfate, GOAES) for the intensification of chemical and adsorption processes, increasing the effect of purification of diffusion juice. The equipment andtechnological scheme of obtaining the diffusion juice with the use of additional reagents was developed, including deep extraction of pulp and return of the press water for diffusion. It has been shown that with the addition of the coagulant GOAES, depending on the typical schemes of existing plants, as well as the technological properties of beets, there was a stable increase in the purity of the diffusion juice. From the presented data it can be seen that the purified juice obtained by the advanced technology with the addition of the coagulant GOAES and pressed pulp have a higher quality. Ultimately, the advanced technology proposed increases the overall juice purification effect by 9.1…23.5%. Research results indicate that pre-treatment of pressurized water by the coagulant GOAES, improves the performance of juices and pressed pulp. The effect achieved is due to the formation of a strong complex of aluminium pectate during juice extraction, which results in the preservation of the elastic framework of the conductive beet chip fabrics and, as a consequence, the reduction of the content of sugars in the diffusion juice. In addition, unlike gypsum, nanosized particles of aluminium coagulant GOAES, do not lead to abrasive wear of screwdrivers and inlay of their mesh surface, and in comparison with alumina do not cause corrosion of equipment and do not increase the flow of lime to neutralize SO42- in conditions and, accordingly, its increase.