Apparat til våd röggasafsvovling

A nozzle 11 is provided whose discharge port 12 is in absorption liquid b of a liquid reservoir 2 which reserves the absorption liquid b containing the absorbent a and which is arranged below of an absorption tower 1 into which combustion exhaust gas d containing sulphur dioxide is introduced. A reduction section 14 is provided on the downstream side from a pipe 15 which is connected to the discharging side of the pump 13 which circulatively supplies the absorption liquid b to the nozzle 11, and an air suction pipe 17 is provided to have an opening 18 on the downstream side from the reduction section 14. The effective cross section of the reduction section 14 is narrower than the effective cross section of the nozzle 11 on the downstream side from the opening 18. The wide and narrow relation of such an effective cross section forms a negative pressure region on the downstream side from the reduction section 14. The air introduced into the negative pressure region is involved in the absorption liquid as minute air bubbles due to the absorption liquid contraction stream peeling effect to produce a mixture stream of air and liquid. The mixture steam of air and liquid into spouted in the absorption liquid in the liquid reservoir 2 to produce a wake around the mixture stream of air and liquid. Thus, a flow is formed and is diffused in the whole region before the minute air bubbles combines. In this way, sulfite in the liquid reservoir 2 is oxidized to sulfate.