| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide wet type flue gas desulfurization equipment provided with an absorption column which attains a high desulfurization rate while decreasing the pressure loss of an exhaust gas stream and which can be miniaturized. <P>SOLUTION: This wet type flue gas desulfurization equipment is provided with a circulation tank 6 for storing an absorbing liquid 5 and the absorption column 1 which is arranged above the tank 6, into which the exhaust gas discharged from a combustion unit such as a boiler is introduced and in which the introduced exhaust gas is brought into gas-liquid contact with the liquid 5 that is withdrawn from the tank 6 and jetted from spray nozzles 13 of spray headers 12 arranged at multiple stages in the flow direction of the exhaust gas. Two-way spray nozzles containing an upward facing spray nozzle and a downward facing spray nozzle are used as the nozzles 13. At or near the lowermost stage, the ratio of the amount of the liquid 5 to be jetted from the upward facing nozzle to that of the liquid 5 to be jetted from the downward facing nozzle ( the amount of upwardly jetted liquid/ the amount of downward jetted liquid ) is made to be 0.1-0.9 and at each of other stages, the ratio of the amount of the liquid 5 to be jetted from the upward facing nozzle to that of the liquid 5 to be jetted from the downward facing nozzle is made equal or almost equal. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
