摘要
通常烟气中的酸性气体采用Ca（OH）2净化，然而当烟气温度在300℃以上时，Ca（OH）2喷入到烟气中将快速生成CaCO3。研究了两种CaCO3的反应特性，比较了200-900℃内CaCO3类吸收剂和Ca（OH）2与烟气中HCl气体的反应率，发现在600℃左右和800℃及以上，CaCO3类吸收剂的反应率与Ca（OH）2相当或更高；CaCO3类吸收剂、特别是改性CaCO3可替代Ca（OH）2作为干式净化HCl气体的吸收剂，合适的反应温度在600℃左右。
Ca（OH）2 is a common absorbent for acidic gas removal from flue gas. However, as temperature is higher than 300℃, Ca（OH）2 in the flue gas will react with CO2 and formation of CaCO3 will be significant. The reaction characteristics of two CaCO3 absorbents were studied; the conversion rates of CaCO3-based absorbents and Ca（OH）2 were compared when reacting with HCI gas in the temperature range of 200-900℃. The experimental results showed that when temperature was around 600℃ and higher than 800℃, conversion rates of CaCO3 based absorbents were comparable to or even higher than those of Ca（OH）2 under the same conditions; and that CaCO3 based absorbents, especially modified CaCO3 can replace Ca（OH）2 as absorbents for removing HCl from flue gas with the proper reaction temperature around 600℃.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2005年第8期587-590,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.50006009)
