烧结烟气氨法脱硫塔气液两相流数值模拟研究-温荣耀.pdfVIP

烧结烟气氨法脱硫塔气液两相流数值模拟研究 1 1 1 温荣耀 ，刘克俭 ，魏进超 (1. 中冶长天国际工程有限责任公司，410007 ） [ 摘摘 要要 ] 氨法脱硫是目前广泛应用的烧结烟气脱硫技术。脱硫塔是氨法脱硫系统的核心设备，塔内的气液 摘摘 要要 分布情况对脱硫效率至关重要。本文选用 FLUENT 作为计算工具，以烧结烟气氨法脱硫塔作为研究对象，对塔 内气相湍流采用Euler 方法描述，对喷淋液滴采用 Lagrange 颗粒轨道模型描述，研究烟气入口倾角、烟气入口 距离浆液池液面高度对脱硫塔内气液两相流场的影响，并对脱硫塔的关键参数取值给出合理建议。 [ 关键词关键词 ] 氨法脱硫塔；气液两相流；数值模拟；参数优化 关键词关键词 Numerical Simulation of Two-phase flow in Desulfurization Tower of Sintering Flue Gas Ammonia Process 1 1 1 Wen Rongyao , Liu kejian ,Wei jinchao ( 1.Zhongye Changtian International Engineering Co.,Ltd,410007) [ Abstract ] Ammonia process is now widely used in desulfurization of the sintering flue gas. The desulfurization tower is the key equipment of a FGD system, and its internal flow is important for increasing the desulfurization efficiency. The commercial computational fluid dynamic software FLUENT is used to analyze the two-phase flow in a sintering flue gas desulfurization spray tower. The Euler-Lagrange method is used to describe the gas flow and the motion of the liquid droplets is described with the particle trajectory model. The influence of different inlet angles and different inlet heights of the sintering flue gas on the flow field in the desulfurization spray tower are studied and the optimal range of the inlet angle and the inlet height are obtained accordingly. [ Keyword ] desulfurization tower; two-phase flow; numerical simulation; parameter optimization 1 前言 一般情况下，钢铁企业 SO2 排放总量的 40%～60%来自烧结过程，因此做好烧结过程中 SO2 的排放控制是钢铁企业污染治理的重点。烟气脱硫国产化是降低工程造价、治理 SO2 、发展环 保产业的需要。 氨法脱硫工艺是国内外烟气脱硫常用的成熟工艺。氨法烟气脱硫工艺中脱硫塔主要选用喷 淋塔，这是因为相对于其它吸收装置，喷淋塔除脱硫效率高外，还具有压降小、内构件相对较 少和不易结垢等优点。实际