| Summary: | 碩士 === 國立屏東科技大學 === 環境工程與科學系所 === 96 === In Taiwan power company,there were coal-fired boiler units utilizing wet limestone-gypsum FGD units for flue gas desulphurization. Recently ,the price of gypsum by-product is getting down because the production is getting more. It is time to reevaluate what kind of FGD is suitable for Taipower to set new coal-fired boiler units in the near future.
Seawater contains natural alkalinity, in terms of carbonate ions(CO32-) and bicarbonate ions(HCO3-)can be employed to remove sulfur dioxide from flue gas. Seawater FGD offers a number of remarkable abvanages, such as the simplicity of the process, less process water and no additional chemical is needed, and no solid wastes are produced, and high sulfur dioxide removal can be achieved.
In the study,we were to evaluate the feasibility of Seawater FGD to be utilized in large coal-fired boiler units of Taipower. For this purpose,the study had been finished ,and the conclusions were as follows :
1. We have designed and constructed a little packing tower and a little perforated plate tower seawater FGD to test in Tai-Chung and Da-Lin power pant. Both of the two systems can remove more than 90% of the sulfur dioxde from flus gas exited from EP of large coal-fired boiler units in the two power plants.
2. In addition to recognize high sulfur dioxide removal of seawater FGD in our tests ,we also built the abilities to design it.
3. Both of packing toewe and a little perforated plate tower seawater FGD are in commercial operating in the world and have the advantages and disadvantages of itself, but perforated plate type is less easy to cause clogging than packing tower,therefore it is more easy to handle.
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