氨法脱硫试验研究分析

EXPERIMENTAL STUDY AND ANALYSIS OF DESULPHURIZATION BY AMMONIA METHOD

为研究氨法脱硫中气液比、吸收液pH值、吸收液浓度以及进口烟温对脱硫效果的影响，设计了一套实验台，以亚硫酸铵为吸收剂进行了实验研究和分析。结果表明．气液比越小，脱硫效率越高；吸收液pH值越大，脱硫效果越好；脱硫效率随吸收液浓度的增大先增加后减小，中间存在最大值；而温度对脱硫效果的影响不大。同时可根据此结果．气液比选择在0．2-0．25L／m^3范围，pH值选择为6～7．5范围，吸收液浓度为5．5％左右时．可使脱硫效果达到最好。

To study the effect of desulphurization from gas/liquid ratio, pH value and concen- tration of absorption liquid, and entrance temperature of flue gas, the paper designed an ex- perimental plant and made the experimental study and analysis. Results showed that the smaller of the gas/liquid ratio was, the higher of the efficiency of desulphurization would be. With the pH value of absorption liquid increasing, the efficiency of desulphurization would al- so go up. While it would increase first and then go down if the concentration of absorption liquid got higher and there would be a maximum. The temperature of flue gas had little im-pact on the efficiency of desulphurization. Meanwhile, it would make the the efficiency of desulphurization get better if the gas/liquid ratio was chosen at 0.2-0.25L/m^3, pH value at 6-7.5 and concentration of absorption liquid at about 5.5%.