摘要
在旋转喷雾蒸发中试平台上开展了脱硫废水浓缩液喷雾蒸发试验研究,分析了不同工况、不同浓缩倍率的废水雾化液滴群蒸发特性,并对蒸发产物进行了微观形貌、组分的表征及吸湿性测试。结果表明:在相同入口烟气条件下(360℃温度、500 m^(3)/h体积流量),随着废水浓缩倍率增加,塔内平均温度略微提升,塔出口水汽体积分数降低,当气液比大于9500 m^(3)/m^(3)时,旋转喷雾蒸发工艺对不同浓缩倍率的脱硫废水具有良好的适应性,均能保证产物含水率低于2%;低浓缩倍率的脱硫废水蒸发产物盐分占比较小,吸湿性较弱,但高浓缩倍率废水蒸发产物中的结晶盐含量显著增加,具有较强的吸湿性。
Experimental research has been conducted on the spray evaporation of concentrated desulfurization wastewater on a rotary spray evaporation test platform.Evaporation characteristics of wastewater droplets under different operating conditions and concentration ratios were analyzed.The microscopic morphology,composition,and hygroscopicity of the evaporation products were also tested.Results show that with the increase of concentration ratio,the average temperature inside the tower slightly increases,while water vapor volume fraction at the tower outlet decreases,under the same inlet flue gas conditions(360℃,500 m^(3)/h).When the gas-liquid ratio is greater than 9500 m^(3)/m^(3),the rotary spray evaporation tower will exhibit good adaptability to desulfurization wastewater with different concentration ratios,maintaining the water content of the products below 2%.The hygroscopicity of the evaporation products of desulfurization wastewater with low concentration ratios is relative weak due to the small proportion of salts,while the evaporation products of wastewater with high concentration ratio show strong hygroscopicity due to the significant increase in content of crystalline salts.
作者
陈海杰
麻晓越
魏新
詹凌霄
陈恒
杨林军
CHEN Haijie;MA Xiaoyue;WEI Xin;ZHAN Lingxiao;CHEN Heng;YANG Linjun(Datang Environment Industry Group Co.,Ltd.,Beijing 100097,China;Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2024年第10期1656-1662,共7页
Journal of Chinese Society of Power Engineering
基金
大唐环境产业集团股份有限公司科技资助项目(DTHJ-2022-20413)。
关键词
脱硫废水
浓缩
旋转喷雾蒸发
干燥产物
desulfurization wastewater
concentration
rotary spray evaporation
drying product
