초록 ▼

A catalytic combustion chamber is provided with at least two catalytic combustion zones arranged in flow series. In a first mode of operation fuel is supplied from first fuel injectors, positioned upstream of the first catalytic combustion zone, into the catalytic combustion chamber and is burnt in

A catalytic combustion chamber is provided with at least two catalytic combustion zones arranged in flow series. In a first mode of operation fuel is supplied from first fuel injectors, positioned upstream of the first catalytic combustion zone, into the catalytic combustion chamber and is burnt in the first catalytic combustion zone in order to preheat the subsequent catalytic combustion zones. In the second mode of operation the supply of fuel to the first fuel injectors is reduced and fuel is supplied from second fuel injectors positioned between the first catalytic combustion zone and the second catalytic combustion zone into the space between the first catalytic combustion zone and the second catalytic combustion zone. This prevents the first catalytic zone becoming overheated, and reduces the possibility of the second and third catalytic combustion zones becoming overheated and allows the optimum catalyst to be selected for the first catalytic combustion zone.

대표청구항 ▼

[ We claim:] [1.] A method of operating a catalytic combustion chamber, the catalytic combustion chamber comprising a first catalytic combustion zone and a second catalytic combustion zone spaced from and positioned downstream of the first catalytic combustion zone, means to supply air to the first

[ We claim:] [1.] A method of operating a catalytic combustion chamber, the catalytic combustion chamber comprising a first catalytic combustion zone and a second catalytic combustion zone spaced from and positioned downstream of the first catalytic combustion zone, means to supply air to the first catalytic combustion zone, means to supply fuel to the first catalytic combustion zone, means to supply fuel to the space between the first and second catalytic combustion zones, a pilot combustor upstream of the first catalytic combustion zone and means to supply air and fuel to the pilot combustor zone, the method comprising:a) supplying fuel to the pilot combustor to preheat the first catalytic combustion zone to a required operating temperature range in a first mode of operation,b) supplying substantially all of the fuel to the first catalytic combustion zone in a second mode of operation,c) reducing the supply of fuel to the first catalytic combustion zone and supplying fuel to the space between the first and second catalytic combustion zones in a third mode of operation.