Gaseous potassium chloride (KCl) that constitutes a relatively large portion of the combustion gas of municipal solid waste can condense on the surface of boiler heat exchanger tubes, causing severe corrosion attacks. To reduce the chlorine-induced high-temperature corrosion, sulfate-based additives have been used. In this study, a two-step numerical procedure is proposed to quickly predict the effect of the injection of sulfate-based additives on the removal of gaseous KCl. A computational fluid dynamics (CFD) simulation is first carried out to obtain the temperature distribution. Then, the thermal decomposition of sulfate additives, sulfation of gaseous KCl, and condensation of K2SO4 are calculated to predict the species concentration profiles at the temperature conditions given by the CFD simulation. After validation with a laboratory-scale experiment using [Formula: see text] , the procedure is applied to a pilot-scale boiler to examine the effects of [Formula: see text] , [Formula: see text] , and [Formula: see text] . The calculation results show that each additive has an optimal injection temperature range: approximately 800 °C for [Formula: see text] and 1000 °C for both [Formula: see text] and [Formula: see text] , which are consistent with the values reported in the literature. The expressions for the stoichiometric KCl removal efficiency of each additive are derived and compared with the calculated efficiencies.

中文翻译：

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通过注入硫酸盐类添加剂去除废物焚烧产生的气态氯化钾的两步数值程序。

构成城市生活垃圾燃烧气体的较大部分的气态氯化钾（KCl）会凝结在锅炉换热管的表面，从而引起严重的腐蚀。为了减少氯引起的高温腐蚀，已使用基于硫酸盐的添加剂。在这项研究中，提出了一个两步数值程序来快速预测注入硫酸盐类添加剂对气态氯化钾的去除效果。首先执行计算流体动力学（CFD）仿真以获得温度分布。然后，计算出硫酸盐添加剂的热分解，气态KCl的硫酸化和K2SO4的冷凝，以预测CFD模拟给出的温度条件下的物种浓度分布。在使用[公式：参见文本]进行实验室规模的实验验证后，将该程序应用于中试规模的锅炉，以检查[公式：参见文本]，[公式：参见文本]和[公式：参见]的效果文字]。计算结果表明，每种添加剂都具有最佳的注射温度范围：[公式：参见文本]约为800°C，[公式：参见文本]和[公式：参见文本]均为1000°C，与文献中报道的数值。得出每种添加剂的化学计量KCl去除效率的表达式，并将其与计算出的效率进行比较。计算结果表明，每种添加剂都具有最佳的注射温度范围：[公式：参见文本]约为800°C，[公式：参见文本]和[公式：参见文本]均为1000°C，与文献中报道的数值。推导出每种添加剂的化学计量KCl去除效率的表达式，并将其与计算出的效率进行比较。计算结果表明，每种添加剂都具有最佳的注射温度范围：[公式：参见文本]约为800°C，[公式：参见文本]和[公式：参见文本]均为1000°C，与文献中报道的数值。推导出每种添加剂的化学计量KCl去除效率的表达式，并将其与计算出的效率进行比较。