Method and the supply system of a stoker-fired boiler with the multi-fuel burners, preferably for burning alternative fuels

The method of feeding a grate boiler with multi-fuel burners consists in the fact that alternative fuels in the form of liquid gas, dust or suspension of crushed fuel are burned in at least one multi-fuel burner (2) in the combustion chamber (3) of the grate boiler (1) and the flue gas stream flows out from multi-fuel burners (2) towards the grate (4) in the combustion chamber (3) and exhaust gas recirculation takes place in the volume of the combustion chamber (3). The grate boiler power supply installation with multi-fuel burners, in the heating boiler furnace shown in the figure, consisting of a grate (4) located in the lower part surrounded by screen pipes (5) of the combustion chamber (3), has multi-fuel burners (2) installed in the bends of the pipes screen (5) combustion chamber (3) in the upper part of the grate boiler (1) and the main axes of multi-fuel burners (2) are directed at the boiler grate (4), the multi-fuel burners (2) are equipped with stubs for supplying combustion air (6), gaseous or pulverized fuel (7) and a stub for supplying liquid fuel or liquid suspension of crushed solid fuel (8) and a stub for dispersing liquid fuel (9).