| 生物质燃烧和热解中钾的释放规律研究进展 |
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| 引用本文： | 王洋,董长青. 生物质燃烧和热解中钾的释放规律研究进展[J]. 化工进展, 2020, 39(4): 1292-1301. DOI: 10.16085/j.issn.1000-6613.2019-1155 |
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| 作者姓名： | 王洋 董长青 |
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| 作者单位： | 1.中国华能集团有限公司生产环保部，北京 100031;2.华北电力大学可再生能源学院，北京 102206 |
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| 摘 要： | 生物质中碱金属钾的含量较高,钾在燃烧和热解过程中释放到炉内,会造成积灰、结渣、腐蚀等问题,影响锅炉安全、经济运行。本文通过对文献进行比较和分析,介绍了生物质中钾的含量和赋存形式,碱金属的定量检测方法,生物质中钾在不同条件下热解和燃烧过程中的释放规律,以及燃料成分和粒径、反应温度和升温速率、反应器类型等因素对钾释放规律的影响。结果表明,生物质燃料中钾的赋存形式包括有机钾、无机钾和含钾矿物质等;有机钾分解所释放出的一次产物,最终会经过不同路径的二次反应以其他形式释放或留在灰中;钾的最终释放形式与释放过程中发生的二次反应密切相关,主要包括KCl、K2SO4、KOH和含钾矿物质。
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| 关 键 词： | 生物质 燃烧 热解 钾 释放 |
| 收稿时间： | 2019-07-19 |
Release of K during biomass combustion and pyrolysis:a review |
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| WANG Yang,DONG Changqing. Release of K during biomass combustion and pyrolysis:a review[J]. Chemical Industry and Engineering Progress, 2020, 39(4): 1292-1301. DOI: 10.16085/j.issn.1000-6613.2019-1155 |
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| Authors: | WANG Yang DONG Changqing |
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| Affiliation: | 1.Production Management and Environment Protection Department, China Huaneng Group Co. , Ltd, Beijing 100031, China
2.Renewable Energy School, North China Electric Power University, Beijing 102206, China |
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| Abstract: | The high content of alkali metal potassium in biomass and its release into furnace during combustion and pyrolysis may cause problems such as ash accumulation, slagging, corrosion, etc, affecting the safe and economic operation of the boiler. By comparing and analyzing literatures, the paper introduces the content and form of potassium in biomass, the quantitative detection methods of alkali metal, and the release mechanism of potassium under different conditions in pyrolysis and combustion. The effects of fuel composition, particle size, reaction temperature, heating rate, reactor type and other factors on the release of potassium are also discussed. The occurrence forms of potassium in biomass fuels include organic potassium, inorganic potassium and potassium-containing minerals. The primary products released by the decomposition of organic potassium will eventually be released in other forms or left in the ash through secondary reactions of different paths. The final release form of potassiumis closely related to the secondary reaction that occurs during the release process, including KCl, K2SO4, KOH and potassium-containing minerals. |
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| Keywords: | biomass combustion pyrolysis potassium release |
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