METHOD AND APPARATUS FOR RECOVERING TOBACCO EXPANSION AGENT

摘要

A method for recovering tobacco expansion agent includes the following steps: impregnating the tobacco in a expansion agent, then recovering the expansion agent in the impregnating apparatus, lastly expanding the impregnated tobacco, the boiling point of the expansion agent is between 20? and 80?, recovering the liquid expansion agent in the impregnating apparatus and gasifying it, the gasified expansion agent being farther condensed to liquid after primary cooling, the storage tank for the condensed expansion agent being used circularly.A apparatus for recovering tobacco expansion agent comprises a tower(1), a gas inlet pipe(8) on the lower part of the tower, a spraying apparatus(4) on the upper part of the tower,a gas outlet(2) on the top of the tower and a liquid outlet(3) at the bottom of the tower. A down opening cone-shaped outlet (5) is provided on the end of the inlet pipe, and a gas reflect distribution cone(7) is provided on the lower end of the cone-shaped outlet. The method and apparatus can purify the liquid expansion agent and remove the impurity of the tobacco.