METHOD OF AND DEVICE FOR COMBUSTION OF SOLID HYDROCARBON FUELS IN BURNER-FURNACE DEVICES Russian patent published in 2007 - IPC F23C3/00 

FIELD: heat power engineering.

SUBSTANCE: proposed method of combustion of solid hydrocarbon fuels in burner-furnace devices consists of partial oxidation of carbon in solid fuels at high temperature by mixture of air steam, cleaning of fuel from mechanical admixtures and gums, mixing with and ignition of fuel mixture thus formed. Preliminarily ground solid hydrocarbon fuel, lumps of size not exceeding 100 mm over largest side, and fines not exceeding 20-25 % of weight of charged fuel at humidity of 15-20 % is loaded into chamber for drying by exhaust gases of burner-furnace device by heating to 105-195°C and is held in chamber within the range of indicated temperatures at continuous removal of moisture to moisture to maintain constant weight and then absolutely dry fuel is fed into gas generator where it is heated to 700 - 900°C by exhaust gases of burner-furnace device without admission of air, then steam is fed at pressure of 1.5 - 2.0 kgf/sq. cm at a ratio of 40% of fuel and 60% of water, mass %, and interaction of red-hot carbon in fuel and steam is provided with formation fuel gases and vapor like gums which are cleaned from dust and ash and then are delivered, together with steam at the pressure and temperature stated above and at the same ratio, into reactor filled with nickel or silica-alumina catalyst in which obtained mixture of gases and vapor-like gums is subjected to conversion by heating to 700-900°C by exhaust gases of burner-furnace device and afterburner at the same pressure, and then gas mixture, thus formed, (synthesis gas) is cleaned from sulfur by cooling mixture lower than 100°C at a pressure of 1.5-2.0 kgf/sq. cm in cyclone accumulator and is delivered to gas burners of burner-furnace device and afterburner, and crystalline sulfur, possible mechanical impurities and water accumulated in cyclone accumulator are periodically removed. Invention provides four-fold increase of heat value of synthesis gas, as compared with generator gas, reduces nitrogen content in synthesis gas by 52.5%, increases two times yield of synthesis gas from one kg of solid fuel, excludes completely gums in produced synthesis gas, thus preventing gumming of parts and mechanisms of burner furnace devices, excludes presence of such gases in synthesis gas as carbon dioxide, sulfur oxides which decrease energy characteristics of produced synthesis gas and affect surrounding medium, increases 2.5 times amount of water used as fuel component, thus providing economy of solid hydrocarbon fuel up to 50% by weight and recycling of sulfur from solid hydrocarbon fuel, which is valuable material, into production, increases efficiency of burner furnace devices owing to use of energy of exhaust gases.

EFFECT: improved efficiency of operation of burner furnace devices.

3 cl, 1 dwg