SOLID FUEL COMBUSTION METHOD Russian patent published in 2004 - IPC

FIELD: railway transport.

SUBSTANCE: invention can be used for combustion of solid fuels, for instance, in heating boilers of railway cars at self-contained operation. Proposed method comes to delivery of fuel into burning zone, its ignition and combustion, removal of fine fractions of slag through grate bar slot which is periodically expanded for removal of larger fractions out of burning zone. Burning zone is divided into upper and lower parts, combustion is carried out in two steps, respectively, in said parts for which purpose fuel is displaced from one part into the other, ignition of fresh portion of fuel is provided in process of second step from combustion products and radiant heat of previous portion. Fresh portion of fuel is fed into upper part of burning zone after displacing of previous portion into lower zone. Slot of grate bars in lower part is expanded during second step. Displacement of fuel from upper part into lower part is carried out after complete removal of slag from lower part. Incomplete combustion products are afterburnt in burning zones. Delivery of fuel is done by striking of fuel against wall of combustion chamber and its jumping back to grate bars. Slot of grate bars is gradually increased in process of second step. Fuel elements in process of their combustion are grouped in lower part of burning zone. Burning zones are arranged one over the other.

EFFECT: provision of complete burning of fuel, increased efficiency of furnace, reduced formation of nitrogen oxides.

10 cl, 5 dwg