Process and apparatus for the saccharification of cellulose materials, such as wood and wood waste, as well as annual plants such as straw etc., by hydrolysis with dilute acids at elevated temperatures and pressures, and washing out the sugar, which is formed in each case, under considerably milder temperature and pressure conditions to obtain sugar solutions which are fed to the fermentation to alcohol as fuel, where appropriate obtaining by-products

摘要

Process for the saccharification of cellulose material such as wood and wood waste, and process for the prehydrolysis of annual plants such as straw, bagasse, bamboo etc., and for the cellolignin hydrolysis of these annual plants, and washing out the obtained sugar solutions outside the percolator by means of a reciprocal pusher centrifuge, after which first the hexoses contained in the sugar solution are fermented by means of Saccharomyces cerevisiae in a continuous fermentation apparatus to alcohol, with return of the yeast suspension which has been separated off from the fermented mash to the automatic fermenter, removal of the alcohol by distillation in a first continuous mash column, return of the pentose-containing residue from this in a continuous fermentation apparatus for fermentation of the pentoses by means of a special fungus with return of the special fungi which have been separated off from the fermented mash to the automatic fermenter, removal of the resulting alcohol by distillation in a second continuous mash column, where the preconcentrated alcohol vapour from the two mash columns is concentrated to 96% by volume alcohol in a rectifier column. Protection is also sought for an apparatus for emptying the resulting lignin residue from the percolator by means of a cyclone, where the expansion vapour produced in the cyclone is drawn off from the top of the cyclone and condensed in a downstream vessel for heating the washing water required in the subsequent process.