Rotary air preheater
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United States of America Patent
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Dec 27, 2022
Grant Date -
Aug 25, 2022
app pub date -
May 12, 2022
filing date -
Dec 29, 2020
priority date (Note) -
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Abstract
A rotary air preheater is provided, including: a rotor and a steam soot-blowing device arranged in a cold secondary air inlet channel of secondary air section. The steam soot-blowing device includes a steam sootblower, a first pipe communicating with the steam sootblower and extending in a radial direction of the rotor, and nozzle assemblies communicating with the first pipe. The nozzle assembly includes a first nozzle assembly and a second nozzle assembly, and the first nozzle assembly is located upstream of the second nozzle assembly in a rotational direction of the rotor. The first nozzle assembly includes a sprayer, and diameter of an inlet of the sprayer is smaller than diameter of an outlet thereof. The second nozzle assembly includes at least one nozzle, and steam jet velocity at the outlet of the sprayer is greatly smaller than steam jet velocity at an outlet of the nozzle.
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