| 摘要 |
<p>PURPOSE:To maximize the spray quantity to a medium temp. desulfurizing part, to obtain the simplification of a desurfurizer and the higher overall desulftrizing rate than heretofore and to obtain the optimum operating conditions by preventing combustion ash from being recycled. CONSTITUTION:In a flue gas desulfurizer where after a desulfurizing agent is used and waste gas is fed to a desulfurizer 2 at <=200 deg.C of a combustion device and the desulfurizing agent is reacted with SOx in the waste gas, the desulfurizing agent contg. the unreacted de sulfurizing agent is recovered in a low temp. part dust collector 8, after the spent desulfurizing agent contg. the unreacted desulfurizing agent recovered in the dust collector 8 is fed to a medium temp. desulfurizing part 9 at 500-900 deg.C and reacted with SOx in the waste gas, it is recovered in a high temp. part dust collector 4 upstream of the desulfurizing feeding position in the desulfurizer 2. The flue gas desulfurizer is of low temp. desulfurizing and medium temp. recycling type.</p> |
