半干式涤气法脱除CO2实验研究

选用氢氧化钠（NaOH）、一乙醇胺（MEA）、二乙烯三胺（DETA）、三乙烯四胺（TETA）等4种物质和ω[Ca（OH）2]为5％混合作为吸收剂，对半干式涤气法脱除CO2的效果进行了研究。考察了温度、雾化器转速、CO2浓度、吸收剂及其浓度变化时对脱碳率的影响。实验结果表明，该法合适的反应条件为：t=150℃，φ（CO2）=10％，ω（吸收剂）=10％，雾化器转速n=10×10^3r／min，在此条件下，吸收剂脱碳效果由强到弱为DETA＋Ca（OH）2〉NaOH＋Ca（OH）2〉TETA＋Ca（OH）2〉MEA＋Ca（OH）2，相应的最高脱碳率为51％〉48％〉44％〉12％。与传统的湿法相比，半干式涤气法具有方便、经济、能耗低、腐蚀性小、污染小等优点。

Removal of Carbon Dioxide by Semi-dry Scrubber

The purpose of present work is to investigate the removal efficiency of carbon dioxide by semi-dry scrubber. Sodium hydroxide, Monoethanolamine（MEA）, Diethylenetriamine（DETA）, Triethylenetetramine （TETA） and calcium hydroxide with constant concentration 5% were mixed as absorbent. Effect of temperature, rotate speed of atomization mask, concentration of carbon dioxide and absorbent on decarburization rate was studied. The suitable conditions for the reactive were found to be： t=150 ℃ ,φ（CO2）=10% ,concentration of absorbent ω=10% ,rotate speed of atomization mask n=10×10^3 r/ min. In this condition, the sequence of deearburization efficiency for absorbent was DETA ＋Ca（OH）2 〉 NaOH ＋Ca（OH）2 〉 TETA＋Ca （OH）2 〉 MEA＋Ca （OH）2. Correspondingly, the sequence of decarburization efficiency was 51% 〉 48% 〉 44% 〉 12%. Comparing to traditional wet method, removal of carbon dioxide by semi-dry scrubber has advantages of convenient and economic as well as lower energy consumption, erosion and pollution.