【作者】 钟伟飞；

【导师】 吴忠标；

【作者基本信息】 浙江大学 ， 环境工程， 2004， 硕士

【摘要】 本论文的研究工作是国家高技术研究发展计划（863）课题“大中型燃煤锅炉双碱法烟气脱硫技术及设备产业化”子课题（课题编号2001AA642030-1）中的一部分，主要是关于石灰消化工艺及再生池中Ca（OH）₂溶解速率的研究。其目的是研究和优化石灰消化工艺，分析石灰消化反应机理，找到最佳的消化操作条件，提高石灰乳的活性。同时研究双碱法再生池中操作条件对Ca（OH）₂溶解速率的影响，通过优化操作条件，提高石灰的利用率和脱硫效率。 对于石灰消化工艺的研究，主要研究了搅拌强度、石灰粒径、消化水温度、H₂O／CaO和一些常见离子等操作参数对石灰消化过程的影响。通过对这些操作参数的研究与优化，为工业装置提供参考数据。同时，探讨用湿法烟气脱硫过程中的废水或过程循环水消化石灰的可行性。 关于双碱法再生池中Ca（OH）₂溶解速率的研究，主要是模拟再生池中的操作条件，通过恒pH值滴定方法和旋转圆盘系统，研究不同旋转圆盘转速（100～2000rpm）、pH值（4～7）和温度（25～45℃）下Ca（OH）₂溶解速率的变化规律，分析操作条件对Ca（OH）₂溶解速率的影响，找出溶解过程的主要影响参数，从而优化操作条件，提高石灰利用率，降低双碱法烟气脱硫成本等。更多还原

【Abstract】 The study of this paper is one part of 863 Nation Plan of China under project 2001AA642030-1, whose name is "medium and large scale coal burning boiler dual-alkali FGD technology and equipment industrialization". It mainly studied lime slaking process and Ca(OH)2 dissolution rate in regenerated reactor. Through studying and optimizing lime slaking process, it analyzed the mechanism of lime slaking reaction and found the optimum operating conditions to increase the activity of lime milk. In order to increase utilization rate of lime and desulfurization rate, it also studied the influence of operating conditions on the dissolution rate of Ca(OH)2.In the study of lime slaking process, it mainly studied the influence of operating parameters including agitation intensity, particle diameter, water temperature, H2O/CaO ratio and some common ions(Cl-, F-, SO42- and SO32-) etc. The experimental result can be applied to industrial lime slaker as a reference. And it discussed the feasibility of recycling wastewater and process water in WFGD as lime slaking water.Simulating the operating conditions in regenerated reactor of the dual-alkali FGD, the dissolution rate of Ca(OH)2 had been studied by using pH-stat method and rotating disc system. It studied the changing rule of dissolution rate of Ca(OH)2 at different operating conditions including rotating rate(100~2000rpm), pH(4.0-7.0) and temperature(25~55 C). According to the effect of operating conditions on the dissolution rate, the most important parameter was found. Optimizing the operating conditions will increase the utilization rate of lime and reduce desulfurization cost of dual-alkali FGD.更多还原