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OALib Journal期刊
ISSN: 2333-9721
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o2/co2气氛下稻秆添加磷酸二氢铵对固钾及灰熔融特性的研究
, PP. 955-960
Keywords: 生物质,o2/co2燃烧,磷酸二氢铵,碱金属
Abstract:
？研究了21%o2/79%co2气氛下,磷酸二氢铵对稻秆不同温度下的固钾能力及对灰熔融性的影响。利用电感耦合等离子体发射光谱(icp-aes)、x射线衍射(xrd)以及扫描电子显微镜(sem)等检测手段,对稻秆燃烧灰中k元素含量、产物物相以及微观形貌进行分析。固定床燃烧固钾实验表明,添加nh4h2po4能够有效提高稻秆固钾率,900℃下稻秆自身固钾率为14.65%,添加nh4h2po4后固钾率为68.79%,可以有效抑制生物质燃烧过程中碱金属以气态形式析出,并缓解了灰结渣现象。700℃燃烧条件下nh4h2po4和钾反应的主要产物为kpo3;900℃下反应的主要产物为高熔点物质k2cap2o7,从微观形貌可以看出nh4h2po4能够抑制灰颗粒的烧结,添加nh4h2po4能有效提升稻秆灰熔点。
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