Method in connection with a pipe grate for fluidized bed boiler and a pipe grate
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United States of America Patent
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Aug 31, 2004
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N/A
app pub date -
Mar 17, 2003
filing date -
Jan 21, 1999
priority date (Note) -
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Abstract
A method for adjusting a supply of gaseous medium to a fluidized bed boiler performing a combustion process and including a pipe grate comprising a plurality of pipes. An active area of the pipe grate is adjusted to form at least one inactive bed area that is out of use by shutting off the supply of gaseous medium to some of the pipes of the pipe grate utilizing pipe-specific control means included in at least some of the pipes of the pipe grate. Cooling medium is conducted through cooling channels located in the pipes in the at least one inactive bed area at least during the combustion process.
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