| 摘要 |
<p>PURPOSE:To reduce quantities of make-up water by a method wherein circulating cooling liquid is sprayed directly onto waste gas on the upstream side of the flow of waste gas before being desulfurized to humidify and cool the waste gas and said waste gas is brought into indirect contact with the cooling liquid at the downstream side to cool it and thereafter the waste gas is cleaned using absorption liquid slurry being based on Ca absorption agent. CONSTITUTION:In a gas cooler 4, circulating cooling liquid is sprayed directly onto the flow of waste gas 2 before being desulfurized on the upstream side thereof from a sprayer 5 to humidify and cool the waste gas 2. Said waste gas is brought into indirect contact with the cooling liquid at a heat exchanger 6 on the downstream side to cool the waste gas, following which in an absorption column 8, the waste gas is cleaned using Ca absorption agent based absorption liquid slurry 9. As a result, the amount of make-up water to a wet desulfurization device can be reduced.</p> |
