Abstract: Heat processing of pulverized brown coal is carried out in two stages. In a chamber for the first-stage heating, brown coal to be processed is heated to a temperature of thermal decomposition thereof with the formation of a solid matter and a vapor and gas mixture. The resultant vapor and gas mixture is removed for purification and condensed to obtain gaseous and liquid products. In a chamber for the second-stage heating, brown coal, in the form of solid matter, is heated to cause additional decomposition thereof, which results in the formation of a solid product and a vapor and gas mixture. The resultant vapor and gas mixture, together with a part of the resultant solid product, is fed through a return conduit into the chamber for the first-stage heating of the brown coal. To develop a draught which causes the solid product particles to move along the return conduit, the latter is provided with a means for feeding a gaseous heat carrier.

Abstract: According to the invention pulverized solid fuel is processed by heating the fuel to a temperature at which thermal decomposition of the fuel begins and subsequently heating the fuel to a temperature at which an intense thermal decomposition of the fuel takes place to form a vapor-and-gas suspension containing pulverized particles, gas, tar vapors and pyrogenic water vapors. The resultant vapor-and-gas suspension is cooled in a chamber by water and/or pyrogenic water to a temperature from 360.degree. to 140.degree. C. at which pulverized solid particles adsorb heavy tar. To obtain the resulting product in the form of a pulp, the vapor-and-gas suspension is cooled for a second time to a temperature from 80.degree. to 20.degree. C. at which the fractures of intermediate and light tars are condensed.Combustion heat of resulting solid matter is higher than that of the product obtained by a conventional method; in addition, it may be conveyed by a water channel.