【作者】 胡玲玲；

【导师】 胡金榜；

【作者基本信息】 天津大学 ， 化工过程机械， 2006， 硕士

【摘要】 WX/U型脱硫装置是天津大学在天津市科委支持下开发的适用于大中型工业锅炉的高效脱硫除尘一体化装置,设计采用的是钠碱双碱法脱硫工艺。本课题的研究内容是通过选择廉价的脱硫剂,并在添加剂强化作用下以达到保证脱硫效率的目的,从而降低操作成本,对WX/U脱硫装置的应用及其推广具有极其重要的实用价值。本文首先建立了WX/U型脱硫装置的模拟实验平台,对不同脱硫剂的脱硫性能进行了实验研究,研究结果表明,工业氧化钙是最适合的脱硫吸收剂。其次在WX/U模拟实验装置上对添加剂进行了筛选实验,研究不同添加剂对工业氧化钙脱硫的强化作用,结果表明增强作用的大小次序为:硫酸钠>造纸黑液>甲酸>柠檬酸>己二酸>氧化镁>硫酸镁。其中硫酸钠的增强作用最显著,成本也较低,是一个非常有发展前景的添加剂。最后,对硫酸钠强化石灰脱硫时操作条件对脱硫效率的影响进行了正交实验和单因素实验,得到了优化的操作条件,即氧化钙吸收液浓度为0.8%,液气比为1.0 l·m^-3,喉口气速为40 m·s^-1,硫酸钠的适宜浓度为0.004～0.006 mol·l^-1。更多还原

【Abstract】 WX/U desulfurization equipments, an efficient desulfurization and dust removal systems for medium-sized and medium-sized boiler, had been developed independently by Tianjin University under the support of the Tianjin Natural Science Foundation Committee. In the initial design, the Sodium-calcium dual-alkali method was adopted as its primary process. To further reduce the operational cost for extending the application scale of WX/U desulfurization equipments, it was necessary to select a cheaper absorbent and obtain higher removal efficiency with the help of the enhancement of an appropriate additive.In present paper, the simulation experimental set-up of WX/U desulfurization equipments was established and the removal efficiency of various absorbents was investigated firstly. The experimental results showed that lime slurry was the fittest desulfurization absorbent. Secondly, to select an appropriate additive, the enhancement of various additives on the removal efficiency of WX/4U desulfurization equipments using lime as absorbent was investigated experimentally. The results showed that the sequence of enhancement was sodium sulfate>black liquor>formic acid>critic acid>adipic acid>magnesium>magnesium sulfate. Among these additives, sodium sulfate was the most promoting additive for WX/4U desulfurization equipments for its highest enhancement on removal efficiency and the low operation cost.Lastly, the effect of operational parameters on the removal efficiency under the condition that sodium sulfate as an additive for lime slurry was investigated. And the optimum operational parameters under the condition that sodium sulfate as additive were obtained as follows. The mass concentration of lime was 0.8%, liquid-to-gas ratio was 1.0 l·m-3, gas velocity in throat was 40 m·s-1 and the effective concentration of sodium sulfate was from 0.004 mol·l-1 to 0.006 mol·l-1.更多还原