Air pollution control system and method
SO x removal equipment 15 which reduces sulfur oxides from flue gas 12 from a boiler 11 , a cooler 16 which is provided on the downstream side of the SO x removal equipment 15 so as to reduce the sulfur oxides from the flue gas and decrease a gas temperature, CO 2 recovery equipment 17 which includes an absorber for bringing CO 2 in the flue gas into contact with a CO 2 absorption liquid so as to be reduced and a regenerator for causing the CO 2 absorption liquid to emit CO 2 so as to recover CO 2 and regenerate the CO 2 absorption liquid, and ammonia injection equipment 22 for reducing a mist generation material which is a generation source of mist that is generated in the absorber of the CO 2 recovery equipment before introducing the flue gas to the CO 2 recovery equipment, are included.
1. A method of preventing scattering of a CO 2 absorption liquid in a CO 2 recovering method for bringing CO 2 in flue gas into contact with the CO 2 absorption liquid to reduce CO 2 , the flue gas being generated from an industrial facility,
the preventing method comprising:
a first step of injecting ammonia gas to the flue gas generated from the industrial facility to convert SO 3 in a gas state into ammonium sulfate, the SO 3 in the gas state being contained in the flue gas;
a second step of reducing the ammonium sulfate from the flue gas with a dust collector; and
a third step of supplying the flue gas, from which the SO 3 has been reduced, into a CO 2 recovery equipment and bringing flue gas into contact with the CO 2 absorption liquid to reduce the CO 2 contained in the flue gas.
2. The preventing method according to claim 1 , wherein the dust collector is a dry type dust collector.
3. The preventing method according to claim 1 , further comprising: prior to the first step, reducing nitrogen oxides in the flue gas with a NO x removal equipment.