AN APPARATUS AND A METHOD FOR REDUCING AN OXYGEN CONTENT IN A BOILER EXHAUST GAS

摘要

By using an apparatus comprising a fuel catalyst portion disposed downstream or at the intermediate portion of the convectional heat transfer portion of the boiler and a fuel supply apparatus for supplying an oxygen reducing fuel to a position dust before said combustion catalyst portion, said oxygen reducing fuel is supplied to the exhaust gas from a boiler radiation portion and is burnt at said combustion catalyst portion to increase a CO2 content and reduce an oxygen gas content, whereby an exhaust gas composed mainly of nitrogen gas and having an oxygen gas concentration not greater than 1,000 ppm is obtained.