| 摘要 |
PROBLEM TO BE SOLVED: To permit the detection of an amount of combustion in a furnace instantaneously and correctly without being affected by the adhesion of dust, generation of smoke or the like and permit the restriction of discharge of incomplete combustion gas to the outside of a furnace by controlling the amount of air immediately based on the fluctuation of the amount of combustion. SOLUTION: An incinerator 1 is provided with acoustic wave oscillators 8, 8a, irradiating acoustic wave into a space in the incinerator 1, which includes unburnt gas, acoustic wave receivers 9, 9a, receiving the acoustic wave, and an operating means 10, operating the propagating time of the acoustic wave and detecting the amount of combustion. Further, the incinerator 1 is provided with a primary air ventilating means 3 as well as a primary air controlling means 4, ventilating the optimum amount of primary air (a1) against a matter to be incinerated 2, and a secondary air ventilating means 6 as well as a secondary air controlling means 7, ventilating the optimum amount of secondary air (a2) into the space 5 above the matter to be incinerated 2, which includes unburnt gas. In this case, the amount of primary air or secondary air is controlled based on an information from the operating means 10.
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