TGA-DTA-DSC联用对秸秆与煤混烧灰化行为的研究  

TGA-DTA-DSC Analysis of Ashing Process of Straw/Coal Combustion

作　　者：徐承浩[1] 王翠苹[1] 黄飞 李钊[1] 

机构地区：[1]青岛大学机电工程学院,山东青岛266071 [2]中石化青岛安全工程研究院,山东青岛266071

出　　处：《青岛大学学报（工程技术版）》2012年第1期18-22,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金资助项目(ZR2010EM004)

摘　　要：运用TGA-DTA-DSC联合技术研究了生物质与煤不同掺混比例下的燃烧特性、灰热解特性。通过对热重分析仪运行进行四段式设置,实现了安全燃烧和灰热解的连续进行。实验结果表明,秸秆与煤掺混后燃烧特性得到改善,并且在低于20%掺煤比时表现出脱灰效应,而40%掺煤比的混烧则表现出增灰效应;灰的高温热解过程随掺混比的变化规律分为两类,低掺混比混烧灰中无机物间的耦合反应加剧了脱灰效应,而掺煤40%的混烧灰中耦合反应加剧了增灰效应。这些反应与灰中含氯组分/CaSO4/CaCO3的质量分数有关。低掺煤比对混烧电厂解决积灰具有明显的优势,可指导生物质与煤掺混燃烧灰化行为的研究和灰问题的解决。The study of co-combustion and ash pyrolysis characteris blending ratios was performed with TGA-DTA-DSC. The running o to four-stage to achieve the safety combustion and subsequently ash showed that the combustion characteristics were improved for straw/ contents lower than 20% could inhibit ash and reduce ash quantity, ash and increased ash quantity. The variation law of the ash pyrolysi be divided into two tendencies with the blending ratios, the coupling aggravated the ash inhibiting effect when the lower coal blending rati vated the ash promotion effect for the blending ratio with 40% coal. chlorine content and CaSO4/CaCO3 components in ash. Therefore, 1 tics of the straw/coal with f thermogravimetric analyzer pyrolysis. The experimenta different was set 1 results coal co-combustion. Blends with coal while the blend with 40% promoted s process in higher temperature could reactions between inorganic minerals, T and the coupling reactions aggra- hese reactions were related to the ow coal blending ratios have obvious advantages to solve deposition in the co-combustion power plant; the conclusion is of practical guiding to solve the ash problem and to analysis of ashing behavior during straw/coal co-firing.

关 键 词：混烧 掺煤比例 脱灰效应 增灰效应 

分 类 号：TK16[动力工程及工程热物理—热能工程]