A Temperature Control System for an Air Preheater Installation
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United States of America Patent
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Issued Date -
Jan 4, 2024
app pub date -
Feb 11, 2022
filing date -
Feb 12, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
An air preheater (APH) temperature control system, including at least a first APH or combustion/secondary air bypass duct in metered communication with a combustion air inlet duct and a secondary air duct, adapted in use to bleed a portion of the combustion air as secondary air bypass from the air inlet duct upstream of the APH 100 for reintroduction downstream into the secondary air duct, and a flow control device for metering or controlling volumetric flow of the secondary air bypass and tempering primary air flow in use operative to maintain the flue gas outlet temperature at or above a desired minimum predetermined temperature for the incident flue gas volumetric flow exiting the APH alone or in conjunction with other tempering means maintaining mills outlet temperature within a safety range of T10MIN to T10MAX.
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