| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for cleaning a flue gas in such a manner that a set limiting value is not exceeded and a residual matter is positively treated by minimizing the consumption of a collecting material for separating a contaminant. SOLUTION: A flue gas when burning a waste, a sorption material such as an acidified material and/or an adsorbing material is allowed to undergo chemical reaction with a gaseous contaminant present in a gas, e.g. an acidified component and/or a heavy metal and/or an organic compound, and thereby particulate contaminant is formed and is separated by a bag filter 6. Thus a flue gas is cleaned. In addition, the moisture content and temperature of the gas, and the content of the gaseous contaminant are measured. Further, the relative humidity of the gas is increased to an incremental level from a basic level, and this increase is initiated when the content of the gaseous contaminant exceeds an upper limit value. Next, the content of the sorption material to be supplied into the gas is increased, and the relative humidity of the gas is decreased after a limited first period of time. This decrease is initiated when the content of the gaseous contaminant is below a lower limit value to return the relative humidity to the basic level.</p> |
