- 韩云婷1,2，杨利香1,2，纪 晶1,2
引用本文摘 要：测试了上海市某电厂普通粉煤灰和脱硝粉煤灰烧失量、强度活性指数、化学组成、矿物组成及微观形貌等测试，研究了脱硝粉煤灰性能及其与普通粉煤灰的差异，模拟分析了高温煅烧前后高氮含量脱硝粉煤灰基本性能和力学性能变化。研究表明，正常工况下，采用同一煤种的脱硝粉煤灰的需水量比、烧失量、化学组成、矿物组成类型、外观以及微观形貌与普通粉煤灰相似；提出脱硝再燃烧，高氮脱硝粉煤灰经高温煅烧后烧失量、氮含量、三氧化硫含量分别降低38%、98%和53%，28 d抗压强度提高7.7%。 Abstract: The ordinary fly ash and denitration fly ash are assessed by testing the loss on ignition, strength activity index, chemical composition, mineral composition and microtopography. The difference of performance between denitration fly ash and ordinary fly ash are systematically analyzed. The basic performance and mechanical properties of the high nitrogen denitrification fly ash are analyzed by high temperature calcination. The results show that the appearance, water requirement ratio, chemical composition, mineral composition and microtopography of denitration fly ash are similar with ordinary fly ash of the same kind of coal under the normal conditions. While the fineness, strength activity index, loss on ignition, nitrogen and sulphur trioxide reflected a slight change from the ordinary fly ash. It is proposed that the loss on ignition, nitrogen content and sulfur trioxide content of high nitrogen fly ash decreased by 38%, 98% and 53% respectively after high temperature calcination by denitration and reburning technology, and the pressure strength of 28 d increased by 7.7%.
韩云婷,杨利香,纪晶.脱硝工艺对粉煤灰材性影响与安全利用控制技术研究[J].混凝土与水泥制品,2018(7):95-100. HAN Y T,YANG L X,JI J.Study on Effect of Denitration on Performance of Fly Ash and the Technology of Resource Security Utilization[J].China Concrete and Cement Products,2018(7):95-100.