循环流化床烟气脱硫塔内烟气露点的测定

文中进行了循环流化床烟气脱硫技术工业试验研究 ,烟气流量为 20 000nm³/h。试验中用阻容式传感器在线监测和测量烟气干湿球温度两种方法对烟气露点进行测定。在测量烟气的干湿球温度确定烟气的露点时 ,设计了一种湿球温度的测量方法 ,提高了测量的精度。根据两种测量方法得到的烟气露点值 ,提出了一种数据修正方法 ,即取两种方法测量结果的偏差平方和最小 ,用最小二乘法对两组数据进行线性拟合。利用拟合结果对试验中在线测量的烟气露点进行修正 ,得到较准确的反应塔出口的烟气露点值。

Measurements of dew point temperature of flue gas in circulating fluidized bed reactor for flue gas desulfurization

Industrial-scale experiments of flue gas desulfurization (FGD) in a circulating fluidized bed (CFB) reactor were conducted. The nominal flue gas flow-rate through the reactor was 20000Nm³/h. Two methods for measuring the dew point temperature of the flue gas were used in the experiments: capacitive sensor online inspection and measurement of gas dry/wet bulb temperatures. A new method for measurement of wet bulb temperature was adopted during the experiments to increase the measurement accuracy. Based on the result of above flue gas dew point measurements ,a method for data correction was put forward, i.e. to minimize the sum of square deviations of the dew point temperatures measured by the two methods and linearly fit the two data sets by the least square method.Using the fitting results, the online measurement of flue gas dew point temperature was revised, and more exact flue gas dew point temperature at the exit of the CFTB reactor was acquired.