Abstrakt
Distribution of the exhaust gas temperature within the furnace of a grate
boiler greatly depends on its operating parameters such as output. It has
a considerably different character than temperature distributions in other
types of boilers (with pulverised or fluidised bed), as it varies
considerably across the chamber. Results presented in this paper have been
obtained through research of a grate-fired hot water boiler with a nominal
rating of some 30 MW. Measurements have been taken by introducing
temperature sensors into prearranged openings placed in the boiler side
walls. Investigation has been carried out for different output levels.
Tests involved thermocouples in ceramic coating and aspirated
thermocouples. The latter were used to eliminate influence of radiative
heat transfer on measured results. Values obtained with both methods have
been cross-checked.
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