School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.
J Hazard Mater. 2011 May 15;189(1-2):134-40. doi: 10.1016/j.jhazmat.2011.02.009. Epub 2011 Mar 5.
We used a dense phase tower as the reactor in a novel semi-dry flue gas desulfurization process to achieve a high desulfurization efficiency of over 95% when the Ca/S molar ratio reaches 1.3. Pilot-scale experiments were conducted for choosing the parameters of the full-scale reactor. Results show that with an increase in the flue gas flow rate the rate of the pressure drop in the dense phase tower also increases, however, the rate of the temperature drop decreases in the non-load hot gas. We chose a water flow rate of 0.6 kg/min to minimize the approach to adiabatic saturation temperature difference and maximize the desulfurization efficiency. To study the flue gas characteristics under different processing parameters, we simulated the desulfurization process in the reactor. The simulated data matched very well with the experimental data. We also found that with an increase in the Ca/S molar ratio, the differences between the simulation and experimental data tend to decrease; conversely, an increase in the flue gas flow rate increases the difference; this may be associated with the surface reactions caused by collision, coalescence and fragmentation between the dispersed phases.
我们在一种新型半干法烟气脱硫工艺中使用密相塔作为反应器，当 Ca/S 摩尔比达到 1.3 时，实现了超过 95%的高脱硫效率。进行了中试实验以选择全尺寸反应器的参数。结果表明，随着烟气流量的增加，密相塔的压降速率增加，但是，非负荷热气体的温度下降速率减小。我们选择了 0.6kg/min 的水流量，以最小化接近绝热饱和温差并最大化脱硫效率。为了研究不同处理参数下的烟气特性，我们模拟了反应器中的脱硫过程。模拟数据与实验数据非常吻合。我们还发现，随着 Ca/S 摩尔比的增加，模拟数据与实验数据之间的差异趋于减小；相反，烟气流量的增加会增加差异；这可能与分散相之间的碰撞、聚并和破碎引起的表面反应有关。
