| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic gas temperature measuring device preventing disturbance due to a jetting flow amount and a flow rate of a sediment removing gas in gas temperature measurement while effectively removing sediment in acoustic temperature measurement of a gas including dust. SOLUTION: In an aperture arranged in a wall face 3 of a boiler furnace 1 surrounding the gas to be measured, temperature measuring sound wave transmitters 7 and 11 and temperature measuring sound wave receivers 9 and 13 are arranged in waveguides 6 and 10, and sound waves for removing the sediment and sound waves for measuring a temperature can be transmitted inside the waveguides 6 and 10. If sediment removing purge gas sound by means of purge means 14 and 14 becomes noise when gas temperature measuring sound waves are transmitted by means of the sound wave transmitters 7 and 11, acoustic gas temperature measurement can be carried out accurately when the purge gas flow amount is reduced or stopped before transmission of the gas temperature measuring sound waves. Because the sediment removing sound wave are transmitted simultaneously, the sediment inside the waveguide can be moved or sedimentation can be prevented.
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