| 摘要 |
The invention relates to a method for operating a heat-producing plant having a chamber (2) for burning chlorine-containing fuels and a channel (3) connected with said chamber, in which a plurality of consecutive heat-transferring devices (5, 5', 5") are located, which can heated by hot flue gas which flows through the channel in the direction from the combustion chamber (2) towards an outlet (4). The flue gas is conditioned by addition of a sulphur-containing additive that is injected into the flue gas downstream a combustion zone and upstream that heat-transferring device (5) being the first to be hit by the flue gas. By means of the additive, alkaline chlorides in the flue gas is sulphated, with the aim of reducing chlorine-induced corrosion of the heat-transferring devices. As additive, a compound chosen from the group: ammonium sulphate ((NH4)2SO4), ammonium bisulphate ((NH4)HSO4), ferrous sulphate (FeSO4), and sulphuric acid (H2SO4), is used, in order to form reactive sulphur trioxide (SO3) at the occasion of entrance, which is added in a quantity of at least 20 mg S/m3n (normal cubic metres) flue gas. |
