Pulverised solid fuel processing - absorbs heavy gums on solid particles by spray cooling

摘要

Fuel is processed by heating a gaseous heat carrier to 300 -500 degrees C for =1 sec, followed by a rise to 500-800 degrees C for one second. The produced vapour/gas suspension is divided into solid particles and a vapour/gas mixt, and the latter is purified and condensed. Before the separation of the vapour/gas suspension it i cooled by direct contact with a coolant to 140-360 degrees C so that the heavy gums are absorbed by the dust particles of the solid matter. The gum absorption raises the calorific value of the solid product and makes it suitable for hydraulic transport. Any dust made is practically eliminated.