The invention relates to the technical field of
flue gas dry desulfurization, in particular to a
flue gas desulfurization device which comprises a treatment chamber and a gas flow pipeline for introducing
flue gas into the treatment chamber, the gas flow pipeline is shunted to a straight
discharge pipe and a
branch discharge pipe from an inlet end, a grid for separating dust is arranged at the intersection, and the
branch discharge pipe discharges gas from bottom to top; the axis of the separating and bearing mechanism is a
gas explosion channel formed by a uniparted
hyperboloid. The desulfurization agent is arranged at the front position of the
activated carbon treatment device, the pressure of subsequent desulfurization is reduced through desulfurization, the desulfurization agent can react
sulfide with great efficiency, subsequent
activated carbon can achieve third-time
filtration, the floating ring is arranged in the
waist groove in a sleeved mode, the
activated carbon rod is arranged on the floating ring in a sleeved mode, and therefore the desulfurization effect is improved. The activated carbon rod moves up and down in the
waist groove, so that attached dust can be vibrated down, the dust attached to the activated carbon rod is prevented from being accumulated, the flowing speed of purified
airflow is prevented from being influenced, the dust can be cleaned on line, and the desulfurization quality is improved.