Effect of Sulfur on Potassium Migration and Release During Rice Straw Combustion

被引：0

作者：

Fang L. ^{[1
]}

Liu Y. ^{[1
]}

Zhu Y. ^{[1
]}

He Y. ^{[1
]}

Wang Z. ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, Zhejiang Province

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2020年 / 40卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Alkali-metal potassium; Combustion; Migration; Release; Rice straw; Sulfur;

D O I：

10.13334/j.0258-8013.pcsee.191113

中图分类号：

学科分类号：

摘要：

In order to obtain the effect of sulfur on the migration and release of alkali-metal potassium in the combustion process of rice straw, this paper added different amounts of sulfur into rice straw, used fractional extraction combined with inductive coupled plasma atomic emission spectrometry (ICP-AES) to quantitatively measure the content of different types of alkali metals, and X-ray diffraction techniques (XRD) were used to analyze the phase changes in the ash before and after addition. The results show that sulfur can obviously inhibit the release of potassium at 815℃ by standard ashing method. Combined phase analysis shows that the release inhibition is mainly realized by converting low melting point volatile potassium into potassium sulfate and fixing it in ash. In addition, the added sulfur also leads to the decrease of insoluble potassium salt content such as aluminosilicate of potassium in ash. Changing the molar ratio of added sulfur to potassium shows that the inhibition of sulfur reaches saturation when S/K=6. The above fixation phenomenon is closely related to temperature. At the combustion temperature of 400~600℃, sulfur has no fixation effect on potassium, but promotes release. When the combustion temperature is higher than 800℃, sulfur begins to produce a fixation effect on potassium, which can last up to 1200℃. © 2020 Chin. Soc. for Elec. Eng.

引用

页码：1562 / 1568

页数：6

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