摘要
为了研究p H值、鼓泡塔液位对脱硫效率提升的贡献趋势,在台山电厂4号机组(600 MW)开展了脱硫鼓泡塔液位和p H值提升脱硫效率试验。根据p H值提升试验结果,总结出在600 MW负荷下,鼓泡塔液位稳定在220 mm左右,当p H值不断提高(从4.6到5.6)时,脱硫效率从93.78%提高到96.78%,SO2排放质量浓度从119 mg/m3(干态,6%O2),降低到31 mg/m3(干态,6%O2),脱硫效率提升效果明显;另外,根据鼓泡塔液位提升试验结果,负荷保持在600 MW以上,p H值稳定在4.6左右,当鼓泡塔液位不断提升(从210 mm到330 mm)时,脱硫效率从94.41%提高到96.81%,SO2排放质量浓度从107 mg/m3降低到44 mg/m3,脱硫效率提升效果弱于p H值的影响。从而得出,p H值变化对脱硫效率提升的贡献比液位变化的影响大。
In order to study the contribution of pH value and liquid level to the desulfurization efficiency in the bubbling absorption tower, tests have been conducted on Unit 4 in Taishan Power Plant. The tests on pH value conclude that under the condition of 600-MW load and with the liquid level being stabilized at about 220 mm, the desulfurization efficiency is improved from 93.78% to 96.78% with the pH value increasing from 4.6 to 5.6, while the SO2 emission concentration reduces from 119 mg/m3 （dry, 6%02） to 31 mg/m3 （dry, 6%02）, showing a significant effect on desulfurization improvement. Besides, the tests on the liquid level conclude that when the load is maintained over 600 MW and the pH value is stabilized at about 4.6, the desulfurization efficiency is raised from 94.41% to 96.81% with the liquid level increasing from 210 mm to 330 mm, and at the same time, the SO2 emission concentration drops from 87 mg/m3 to 44 mg/m3. The results of these tests exhibit that the contribution of pH value is greater than that of the liquid level to the desulfurization efficiency improvement
出处
《中国电力》
CSCD
北大核心
2015年第7期115-119,共5页
Electric Power
关键词
火电厂
烟气脱硫
鼓泡塔
PH值
液位
脱硫效率
fossil fuel power
flue gas desulfurization
absorption tower
pH
level
desulfurization efficiency
