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燃煤电厂利用锅炉尾部烟气余热对脱硫废水进行喷雾蒸发处理技术应用前景广阔,但此技术存在烟道积灰等问题,研究脱硫废水介稳区的影响因素,对于评估该技术对烟道和除尘器等设备的影响十分关键。因此,本文采用激光法研究了脱硫废水的主要成分(MgCl_2-CaCl_2-NaCl复合盐溶液和单种盐溶液)在去离子水中的溶解度及超溶解度等热力学特性,以及金属离子、搅拌速率、pH值和飞灰对脱硫废水主要成分的介稳区的影响。研究发现金属离子的存在使脱硫废水介稳区变宽,是造成烟道积灰的主要因素,废水烟气混合紊流度、弱酸性环境和飞灰的存在将使脱硫废水介稳区变窄,促进废水晶体析出,可减少烟道积灰。
Coal-fired power plant boiler tail flue gas waste heat on the desulfurization wastewater spray evaporation treatment technology is promising, but there are flue gas fouling and other issues in this technology, research desulfurization waste water metastable zone influencing factors for assessing the technology of flue and The impact of equipment such as precipitators is crucial. Therefore, in this paper, the thermodynamic properties such as solubility and super-solubility of the main components of desulfurization wastewater (MgCl_2-CaCl_2-NaCl complex salt solution and single salt solution) in deionized water were studied by laser method. The effects of metal ions, stirring rate, And fly ash on the desulfurization wastewater main components of metastable zone. It is found that the presence of metal ions widens the metastable zone of the desulfurization wastewater and is the main factor causing ash deposition in flue gas. The turbulence of wastewater flue gas mixing, weak acid environment and the presence of fly ash will narrow the metastable zone of desulfurization wastewater , To promote the precipitation of waste crystals, can reduce flue ash deposition.