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KUŠTRIN, I., SENEGAČNIK, A., JAMŠEK, M.
HARMFUL EFFECTS OF AIR LEAKAGE INTO PULVERISED-COAL FIRED BOILER
KOMUNALNA ENERGETIKA / POWER ENGINERING, 18
The paper presents the reasons and consequences of uncontrolled air on the operation of steam boilers with dust firing i.e. combustion of coal crushed into powder. This type of combustion is more advanced than the combustion of solid fuels of larger granulation. It enables achieving higher output and efficiency. Several conditions must be fulfilled to enable quality combustion. One of these conditions is the optimum fuel to air ratio. This condition can be met if good control over the allocation of combustion air to the burner nozzles is possible. Usually it is possible to achieve from the perspective of installed measurement and control equipment but a major obstacle to this is an entry of uncontrolled air into the boiler. This makes it impossible to maintain optimum conditions for quality combustion.
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