Based on the fundamentals of heterogeneous nucleation, a method to eliminate sulfuric acid aerosol associated with water recycling in the process of limestone-gypsum desulfurization was investigated. The supersaturated environment was achieved in a heat exchanger. Numerical calculation shows that high temperature drop and relative humidity are conducive to the formation of supersaturated vapor environment, and vapor heterogeneous condensation can improve the removal efficiency of sulfuric acid aerosol. Experimental results indicate that the critical supersaturation degree of the sulfuric acid aerosol is found in inverse proportion to their sizes and the removal efficiency of sulfuric acid aerosol could be increased by about 20%. The theoretical and the actual condensable water mass values have been also studied in detail. The mass of condensed water produced by the experiment system is 0.0440 kg/(Nm3·h) as the temperature drop is 5°С, and the most suitable temperature drop is about 1∼2°С for water scarce area. High temperature and humidity reveal a huge potential to recycling water.

中文翻译：

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非均相冷凝降低硫酸气溶胶节水

基于多相成核的基本原理，研究了一种消除石灰石-石膏脱硫过程中与水循环相关的硫酸气溶胶的方法。在热交换器中实现了过饱和环境。数值计算表明，高温降和相对湿度有利于过饱和蒸汽环境的形成，蒸汽非均相冷凝可以提高硫酸气溶胶的去除效率。实验结果表明，硫酸气溶胶的临界过饱和度与其尺寸成反比，硫酸气溶胶的去除效率可提高约20%。还详细研究了理论和实际可冷凝水质量值。实验系统产生的冷凝水质量为0.0440 kg/(Nm3·h)，温度下降5°С，最适合缺水地区的温度下降约1∼2°С。高温和高湿揭示了回收水的巨大潜力。