• 关键词：电站锅炉  氨喷射法  脱硫脱碳  脱除率

• 基金项目：国家重点基础研究项目(No.G19990222);中国博士后科学基金项目(中博基200207)

• 刁永发
• 1. 东华大学环境学院, 上海 200051; 2. 清华大学热能工程系, 煤的清洁燃烧技术国家重点实验室, 北京 100084

• 王淑娟
• 清华大学热能工程系, 煤的清洁燃烧技术国家重点实验室, 北京 100084

• 陈昌和
• 清华大学热能工程系, 煤的清洁燃烧技术国家重点实验室, 北京 100084

• 摘要：利用氨气加水蒸汽喷射方法脱除燃煤锅炉模拟烟气中的CO₂和SO₂气体, 烟气中CO₂和SO₂气体的体积分数分别为12%和0.25%.设定水蒸气温度50℃恒定, 以确保反应器中水蒸汽的含湿量较低, 其化学反应温度在25℃～95℃之间变化, 同时喷入氨气与水蒸气的混合气体, 其脱碳脱硫率随反应时间的变化表明:反应温度为55℃～60℃时, CO₂和SO₂的最大脱除率分别达到70%和95%.对化学反应产物进行FTIR试验, 表明其反应产物主要是碳酸铵盐和硫酸铵盐的混合物.配合BET解吸试验, 结果表明:在低含湿量条件下, 采用喷氨方法, 脱除电厂烟气中的CO₂和SO₂气体过程中, CO₂气体除了被氨吸收发生化学反应, 生成(NH₄)₂SO₄和NH₄HCO₃晶体外, 还被吸附在(NH₄)₂SO₄和NH₄HCO₃晶体的空隙里.

• Abstract：This paper describes our studies on a novel CO₂ and SO₂ removal approach, ammonia and vapor spraying. The inlet concentrations of CO₂ and SO₂ are 12%, 0.25% (V/V), respectively. The temperature of vapor is 50℃ and was kept constant, thus the humidity is very low in the chemical reactor. The chemical reaction temperature was changed between 25℃～95℃. When spraying mixed gases with vapor and ammonia and the reaction temperature was in the range from 55℃ to 60℃, the maximum removal efficiency of CO₂ and SO₂ could reach 70% & 95%, respectively. We analyzed the chemical reaction production by FTIR (Nicolet Company of USA), and showing that its by-product was the mixture of ammonium bicarbonate and vitriol. Combined with BET desorption experiments, the results showed that not only the CO₂ gases was scrubbed by ammonia, but also it could be adsorbed in the bore of crystal of (NH₄)₂SO₄ & NH₄HCO₃.

• Key words：boiler of power plant  ammonia spraying  removing CO₂ & SO₂  removal efficiency

• 
  摘要点击次数： 1817 全文下载次数： 2619