| 摘要 |
PURPOSE:To provide a catalystic burner which is capable of burning completely an unburned fuel portion by providing a throttle at part of a flow passage of the high temperature gas which is generated from a pilot flame that is formed in the rear stage catalyst and mixing well an unburned portion which is generated at the front stage catalyst and the high temperature gas obtained from the pilot flame which is formed at the rear stage catalyst. CONSTITUTION:The concentration of a premixed gas upstream of a front stage catalyst 1 is always changing, and the catalyst is not always used at its optimum temperature. Accordingly, the combustion of the front stage catalyst 1 is not necessarily a complete combustion. But the temperature of the gas at the outlet of a rear stage catalyst 2 is always at optimum temperature for the catalyst and since a temperature over 1,000 deg.C can be obtained, a pilot flame 15 is formed behind the catalyst. Furthermore, by throttling at a throttle section 16 a burner liner 3 in order to promote the mixing of a high temperature gas which can be obtained from the pilot flame 15 at a short distance from it and an unburned portion other than the high temperature gas which is formed by the catalystic reaction the unburned portion generated by the catalystic reaction is mixed well with the pilot flame 15 after passing through the rear stage catalyst 2 and achieves complete combustion.
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