外循环式分解炉压力损失的冷模试验研究

Cold Model Experiment of Pressure Drop in the External Circulating Precalciner

外循环式分解炉是西安建筑科技大学开发的新型碳酸盐分解反应炉,在工程应用中取得了很好的效果,为进一步优化反应炉的结构,试验测试了分解炉截面风速为5～8 m/s,三次风入口风速为24 m/s、26 m/s和28 m/s,固气比Z=0.5的条件下,外循环式分解炉系统主体段压力损失和粗分离器压力损失。结果表明：系统空载运行时,随分解炉截面风速的增大,分解炉主体段和粗分离器的压力损失增大;分解炉截面风速不变,随三次风入口风速的增大,分解炉主体段压力损失减小。系统投料运行时,随分解炉截面风速的增大,分解炉主体段和粗分离器的压力损失增大;三次风入口风速对其压力损失的影响不大。相比空载运行,投料运行时分解炉主体段压力损失增加约1～1.2倍,粗分离器压力损失增加约10%～50%。适当降低分解炉截面风速,是降低分解炉压力损失的有效手段。

External circulating precalciner devised Xi＇an university of architecture and technology is the new type of decarbonation reactor. Good results have been achieved in the engineering application. In order to further optimize the structure of the precalciner, pressure drop in main sector of precaleiner and separator are studied on no-load and load under the conditions that section wind velocity are 5-8 m/s, tertiary-air velocity are 24 m/s,26 m/s and 28 m/s and the solid-gas ratio is 0.5. The results show that： on no-load, pressure drop of both increases with section wind velocity increasing, pressure drop in the main sector of precalciner decreases with tertiary-air velocity increasing. On load, pressure drop in main sector of precalciner and separator increases with section wind velocity increasing, the change of tertiary- air velocity has little effect on the pressure drop of both. Compared to no-load, the pressure drop in main sector of precalciner increases about 1-1.2 times, and the pressure drop of separator increases about 10%- 50%. Reducing the section wind velocity properly is the effective method to reduce the pressure drop of precalciner.