摘要
根据某垃圾焚烧电厂产生的飞灰组分特性,分析单组分及双组分不同配伍比例对飞灰熔融温度的影响。结果表明:飞灰中添加SiO_(2)可以显著降低飞灰的熔融温度,特别是在添加质量分数为0~5%时,每增1%,对灰熔点的降低范围为14~21℃。Al_(2)O_(3)添加比例在10%内能降低飞灰的灰熔点,但添加比例在10%~25%时反而提升飞灰的熔融特征温度。CaO和MgO均能提升飞灰的熔融特征温度,CaO提升的作用较大。酸性氧化物含量较高的粉煤灰对飞灰能起到明显助熔作用。在碱度平衡的条件下,添加二元组分SiO_(2)-MgO和SiO_(2)-CaO会进一步降低熔融温度,SiO_(2)-MgO较SiO_(2)-CaO助熔效果更明显,相反,添加二元组分Al_(2)O_(3)-MgO和Al_(2)O_(3)-CaO会显著提高飞灰的熔融温度。
According to the component characteristics of fly ash produced by a MSW incineration power plant,the effects of different compatibility ratios of single component and two components on the melting temperature of fly ash were analyzed.The results indicated that the addition of SiO_(2) could significantly reduce the melting temperature of fly ash,especially for every 1%step increased when the adding mass fraction was 0~5%,the reduction of ash melting temperature was about 14~21℃.The addition ratio of Al_(2)O_(3) could decrease the ash melting point of fly ash within 10%,but it could increase the melting characteristic temperature of the fly ash when the proportion was 10%~25%.Both CaO and MgO could increase the melting characteristic temperature of fly ash,and CaO could have a great effect.Coal ash with high content of acid oxides could obviously promote the melting of fly ash.Under the condition of alkalinity balance,the addition of binary components SiO_(2)-MgO and SiO_(2)-CaO would further reduce the melting temperature,and the melting aid effect of SiO_(2)-MgO was more obvious than SiO_(2)-CaO.On the contrary,the addition of binary components Al_(2)O_(3)-MgO and Al_(2)O_(3)-CaO would significantly increase the melting temperature of fly ash.
作者
张春飞
胡彦弢
张建东
陈瑶姬
戴豪波
ZHANG Chunfei;HU Yantao;ZHANG Jiandong;CHEN Yaoji;DAI Haobo(Xi’an Aerospace Yuan Dongli Engineering Co.Ltd.,Xi’an Shaanxi 710100;Zhejiang Tiandi Environmental Protection Technology Co.Ltd.,Hangzhou Zhejiang 310013)
出处
《环境卫生工程》
2022年第6期64-69,共6页
Environmental Sanitation Engineering
基金
浙江省能源集团有限公司科学技术项目(ZN-KJ-20-095)
西安航天源动力工程有限公司科技研发项目(2020YDL-146)。
关键词
飞灰
组分
熔融温度
配伍
fly ash
composition
melting temperature
compatibility
