METHOD FOR REMOVING MERCURY IN EXHAUST GAS

摘要

PURPOSE:To economically dry-treat exhaust gas by jetting a specified amt. of activated carbon of specified mesh basing on the weight of mercury in the exhaust gas and water into the gas, regulating the temp. of the gas to a specified value and passing the gas through a bag filter at a specified rate of filtration. CONSTITUTION:A powder layer formed on a bag filter 8 is composed of dust in exhaust gas and powdery activated carbon. Activated carbon of 100-300 mesh is dispersed in the powder layer and 50-300 times (weight) as much activated carbon of 100-300 mesh as mercury in exhaust gas G and water are jetted into the gas G. After the temp. of the gas G is regulated to 120-180 deg.C, the gas G is passed through the bag filter 8 at 0.3-3m/min rate of filtration. Removing efficiency is remarkably increased and the amt. of activated carbon required to attain the conventional removing efficiency can be remarkably reduced.