Method and arrangement for optimising combustion conditions in a fluidised-bed boiler
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United States of America Patent
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Jun 9, 2015
Grant Date -
Jun 14, 2012
app pub date -
Aug 9, 2010
filing date -
Aug 17, 2009
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Abstract
A method and an arrangement for optimizing combustion conditions in a fluidized-bed boiler, in which combustion gas is fed at two or more height levels, the first of which is a primary level (P) which is located at the height of a furnace bottom and the second is a secondary level (S) which is located above fuel feed height (F), above which secondary level (S) there can be still other combustion gas feed levels (T, . . . ). At least one combustion gas feed level (P, S, T, . . . ) is fed at different points of the furnace (11) in its horizontal direction with combustion gases having different oxygen contents such that zones of different oxygen content can be formed in the horizontal direction of the furnace (11).
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