논문 상세보기
pp.446-453
This study provides experimental results of pH restoration of acidified desulfurization seawater by the addition of the alkalinity enhanced seawater and additives (limestone and fly ash). The conservative seawater desulfurization processes use chemical solutions such as caustic soda (NaOH) or calcium hydroxide(Ca(OH)2). The method proposed in this study was aimed at reducing usage of chemicals. A control test was conducted to simulate the existing process without addition of the alkalinity-enhanced seawater and additives (limestone and fly ash). The pH of desulfurized seawater was increased by pH 5.84 through the conservative restoration process (i.e., adding raw seawater and NaOH solution followed by aeration). The 20%, 50%, and 80% of added raw seawater was replaced by the alkalinity-enhanced seawater. From the experimental result, 0.28, 0.89, and 1.05 m3/hr of 48% NaOH solution could be saved when applying the proposed method of the alkalinity enhanced seawater addition. When desulfurized seawater with pH 3.5 was mixed with raw seawater at a ratio of 1:1, the pH of seawater was increased up to pH 6. Therefore, the seawater restoration goal was set as pH 3.5. Experiments were conducted to increase pH of desulfurized seawater to pH 3.5 using additives (fly ash and limestone). Based on these results, the addition of fly ash and limestone to seawater was proved effective for pH restoration of desulfurized seawater.
II. 실험 장치 및 방법
1. 해수 pH 복원을 위한 기존 공정 모사
2. 알칼리도 증대 해수를 이용한 탈황처리 해수 pH 복원
3. 첨가물질을 이용한 탈황처리 해수의 pH 복원3.1.
4. 탈황처리 해수의 pH 복원에 대한 이론적 고찰12,20,21)
III. 결과 및 고찰
1. 해수 pH 복원을 위한 기존 공정 모사 실험
2. 알칼리도 증대 해수를 이용한 탈황처리 해수 복원
3. 탈황처리 해수 pH 복원
IV. 결 론
사 사
References
