主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2023, Vol. 42 ›› Issue (5): 709-713.

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基于热重分析的长白山7种林地枯落物的燃烧性研究

陈奕呈1, 辛颖1, 张德新2   

  1. （1.东北林业大学 工程技术学院，黑龙江 哈尔滨 150040; 2.长白山森工集团，吉林 延边 133000）
  • 出版日期:2023-05-15 发布日期:2023-05-15
  • 作者简介:陈奕呈（1997- ），男，山东枣庄人，东北林业大学工程技术学院硕士研究生，主要从事森林工程研究，黑龙江省哈尔滨市香坊区和兴路26号，150040。
  • 基金资助:
    中央高校基本科研业务费专项资金资助项目（2572015CB05）；黑龙江省基金联合引导项目（LH2020C047）

Study on the combustibility of litter in seven forest lands of Changbai Mountain based on thermogravimetric analysis

Chen Yicheng1, Xin Ying1, Zhang Dexin2   

  1. (1.College of Engineering and Technology, Northeast Forestry University, Heilongjiang Harbin 150040, China; 2. Changbai Mountain Forest Industry Group, Jilin Yanbian 133000, China)
  • Online:2023-05-15 Published:2023-05-15

摘要： 研究长白山7种林地枯落物的燃烧性能，根据热重分析得到的理化指标进行燃烧性排序并分析，为长白山林火防控提供参考。将7种林下枯落物处理成粒径为40目的样品，在SDT-Q600热重分析仪中，分别以10、20、30 ℃/min的升温速率，在高纯空气和氮气2种气氛下，从室温加热到800 ℃，将获得的数据代入DAEM法计算7种林地枯落物的活化能值，用熵权法对上述试验获得的理化指标进行燃烧性排序。7种林地枯落物在空气中的DTG曲线分为4个阶段：失水阶段、主要质量损失阶段、次要质量损失阶段和无机物分解阶段，7种林地枯落物的活化能均值排序为：杨树林>蒙古栎林>长白松林>针阔混交林>白桦林>阔叶混交林>落叶松林，燃烧性评价结果为：长白松林>落叶松林>针阔混交林>杨树林>蒙古栎林>白桦林>阔叶混交林。在林火高发期应加强长白松林、落叶松林的火险监管。

关键词: 林地枯落物, 热重分析, 熵权法, 表观活化能

Abstract: The combustibility of litters of seven forest lands in Changbai Mountain was studied. According to the physicochemical indexes obtained by thermogravimetric analysis, the combustibility was sequenced and analyzed. It provides reference for forest fire prevention and control in Changbai Mountain. Seven species of undergrowth litters are treated into samples with the grain size of 40 meshes, and in an SDT-Q600 thermogravimetric analyzer, the temperature rise rate of 10,20,30 ℃/min are respectively carried out under two atmospheres of high-purity air and nitrogen, The activation energy of seven forest litters was calculated by DAEM method after heating to 800 ℃ from room temperature. The physicochemical indexes obtained from the experiment were ordered by entropy weight method. DTG curves of seven forest litters in air are divided into four stages: The order of the mean values of activation energy of seven forest litters in the water loss stage, the main mass loss stage, the secondary mass loss stage and the inorganic decomposition stage is as follows: populusl forest> quercus mongolica forest > pinus syluestriformis forest> mixed coniferous broad leaved forest > betula platyphylla forest> mixed broad-leaved forest > larix gmelinii forest. The combustibility are as follows: pinus syluestriformis forest > larix gmelinii forest> mixed coniferous broad leaved forest > populusl forest > quercus mongolica forest > betula platyphylla forest > mixed broad-leaved forest. In the high incidence period of forest fire, the fire risk supervision of pinus syluestriformis forest and larix gmelinii forest should be strengthened.

Key words: understory litter, thermogravimetric analysis, the entropy weight method, apparent activation energy