| 摘要 |
FIELD: gas treatment. ^ SUBSTANCE: invention relates to burning gas and liquid fuels on boiler and other fuel-utilizing installations, which method envisages two-stage cleaning of effluent gases to remove harmful impurities and comprises supplying natural gas in the first stage and, in the second stage, afterburning of hydrocarbons on catalyst accompanied by additionally supplying air. In combustion chamber operated within temperature range 1800 to 1100 in the first stage, reductive gas medium is created by (i) burning fuel with air excess factor alpha = 0.9-1.02 hampering formation of nitrogen oxides on catalyst using above-obtained reductive gases and (ii) additionally supplying an oxidant on catalyst at temperatures excluding secondary formation of nitrogen oxides (700 to 250). Catalyst is arranged in multistep order. ^ EFFECT: increased cleaning efficiency and catalyst stability. ^ 1 tbl |
