| abstract |
(57) [Summary] [Purpose] To provide a desulfurization apparatus and method capable of efficiently removing dust even under a low load with a small amount of spray-absorbed liquid. [Configuration] Desulfurization tower main body 1 or desulfurization tower outlet duct 3 A steam pipe 19 for blowing steam is provided inside. The desulfurization tower main body 1 contains saturated steam due to the contact between the absorbing liquid and the exhaust gas. The temperature of the gas in the desulfurization tower main body 1 is 40 ° C. to 60 ° C., and when steam of 100 ° C. or higher is blown into this, it is cooled by the surrounding gas, the steam becomes a saturated concentration at that temperature, and excess steam is condensed. As a result, most of these droplets grow as dust or the like suspended in a gas of several micrometers or less, so that these fine particles are apparently enlarged. The fine particles in the gas flow around the spray droplets of the absorbing liquid, so the ratio of being trapped in the absorbing liquid is small, but when the particles become large, the droplets collide due to inertia and are easily collected, such as dust. The collection efficiency of is increased. |