Problems of catalytic boiler safety and their role in designing and operation of gas-fired boiler

In the following paper, some problems of safety for catalytic boilers with fixed and fluidised beds are discussed. The reason is to protect the boiler from gas and fuel-air mixture explosion. For it the conditions excluding the transition from catalytic combustion to flame must be observed, and they are presented in the article for different combustible gases. A special attention has been paid to the velocity of open flame front propagation. A corresponding theoretical model is given for the different flow regimes.