【摘要】 对220 t/h循环流化床锅炉烟气净化系统的脱硫除尘系统进行了"超低排放"论证和工程改造,并对改造后的系统进行了实验研究和运行参数优化。结果表明,结合旋汇耦合装置和管束除尘除雾器的湿法脱硫除尘系统脱硫效率、除尘效率分别可以达到99.89%、98.36%;当系统脱硫除尘状态为吸收塔入口烟温90～100℃、脱硫浆液pH值5.2～6.2、浆液搅拌速率为350～380 r/min,且石灰石纯度为90%时,系统处于最佳运行状态。更多还原

【Abstract】 The argumentation of ultra low emission along with engineering retrofit were demonstrated on the desulfurization dust removal system of a 220 t/h circulating fluidized bed boiler. Experimental research and operation parameter optimization were also implemented on the modified system. Results show that desulfurization efficiency and dust removal efficiency reaches 99.89% and 98.36% respectively, after system modified with rotary sink coupling device and tube bundle deduster. The optimum operation condition is achieved when the flue gas temperature at the inlet of the absorber is 90～100 ℃, the pH value of the desulfurization slurry is 5.2～6.2, the slurry mixing rate is 350～380 r/min, and the purity of limestone is about 90%.更多还原