PURPOSE: To prepare dehydrated coal in briquet at a low cost, by crushing and classifying low grade coal, mixing dehydrated coal obtained by non-evaporative heating of granulated coal with a heavy tar obtained by dry distillation of surplus dust coal and forming the mixture into briquets.
CONSTITUTION: Low grade coal is fed into a crushing and classifying unit 1 and granulated coal is separated from surplus dust coal. The granulated coal is introduced into a non-evaporative heating and dehydrating device 4 for non evaporative heating and dehydration to produce dehydrated coal, while the surplus dust coal is led into a dry sidtillation devie 6 for distillation into dry distillation gas, light tar, heavy tar, dry distillation char, etc. The heavy tar is mixed with the dehydrated coal and the mixture is formed in a briquetting unit 7 to produce dehydrated coal in briquets. Organic components contained in waste water of dehydration can be removed by adsorption by brining the waste water into contact with the dry distillation char.
NAGAI KOUZOU
KAMEI TAKAO
KOMAI KEIICHI
