煤与污泥的循环流化床富氧燃烧

结合污泥的特性与富氧燃烧技术的优点,在一个内径为100mm的循环流化床焚烧炉内进行煤与污泥的富氧燃烧试验.试验分析了不同煤泥质量比,在氧体积分数为21%～35%环境下的燃烧特性以及送风含氧量、床层温度对烟气成分的影响.结果表明:不同质量比的燃料在不同氧气氛围的燃烧特性不同;当给料量恒定时,随着送风含氧量的增大,总风量减少,炉膛的温度逐渐升高,烟气中SO2与NOx浓度都呈增大的趋势,这有利于SO2与NOx的脱除;NOx体积分数随床层温度的升高逐渐增加.

Oxygen-Enriched Combustion of Sewage Sludge and Coal in CFB

The experimental research on the advantages of oxygen-enriched combustion and the characteristics of sewage sludge was carried out in a CFB incinerator, the diameter of whose furnace is 100 mm. The experimental analysis was made of the combustion characteristics of fuels with different mass rate under the oxygen concentrations of 21%-35%. The further analysis was made of the effects of oxygen content and fluid bed temperature on composition in flue gas. The results show that combustion characteristics vary with different mixing rate between coal and sludge under different oxygen atmosphere. With constant amount of fuel and increase of oxygen content, the total air volume decreases, the furnace temperature increases gradually and SO_2 and NO_x concentrations tend to increase, which is beneficial to the removal of SO_2 and NO_x. NO_x concentration increases gradually as fluid bed temperature increase.