松材线虫病疫木传热速率的影响研究  

Study on the effect of heat transfer rate of pine wilt disease infected wood

作　　者：王钱晴 黄荣庆 徐金梅[1] 赵丽媛[1] 张凤毫 陈瑞瑶 王进[3] 江京辉[1] WANG Qianqing;HUANG Rongqing;XU Jinmei;ZHAO Liyuan;ZHANG Fenghao;CHEN Ruiyao;WANG Jin;JIANG Jinghui(Research Institute of Wood Industry,Chinese Academy of Forestry,Beijing 100091,China;Natural Resources and Planning Bureau of Pujiang County in Zhejiang,Jinhua 322200,Zhejiang,China;Zhejiang Academy of Forestry,Hangzhou 310023,Zhejiang,China)

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]浙江省浦江县自然资源和规划局,浙江金华322200 [3]浙江省林业科学研究院,浙江杭州310023

出　　处：《中南林业科技大学学报》2025年第4期162-170,共9页Journal of Central South University of Forestry & Technology

基　　金：浙江省林业科技项目(2023SY03);国家重点研发计划项目(2023YFF0613801)。

摘　　要：【目的】提高松材线虫病疫木无害化处理效率,实现疫木高价值利用,节约生产时间和成本。【方法】以被松材线虫病感染的马尾松疫木为研究对象,采用饱和蒸汽处理方法,设定木芯温度为65℃,研究不同含水率(MC≤50%、50%120%)和木材径级(D≤16 cm、18 cm≤D≤20 cm、22 cm≤D≤24 cm、26 cm≤D≤28 cm、D≥30 cm)对1 m长马尾松疫木传热速率的影响,利用“木材中心温度计算法”数学模型预测处理时间。【结果】马尾松疫木径级为20 cm时,含水率每增加10%,木芯达到65℃的处理总时间增加20 min,升温速率降低0.4℃/h;马尾松疫木含水率为37%时,径级每增加2 cm,木芯达到65℃的处理总时间增加59 min,升温速率降低1.7℃/h;饱和蒸汽处理后,马尾松疫木含水率增加;模型预测结果显示,含水率和木材径级对处理总时间的影响规律与实际结果相似,含水率在82%以下时,处理总时间模拟值均大于实际值。【结论】饱和蒸汽处理过程中,含水率和木材径级对疫木传热速率影响较大,为有效提高处理效率,将径级和含水率相近疫木放在同一处理中。实际生产中,运用“木材中心温度计算法”预测不同径级疫木处理总时间,可以确保疫木内部温度达到或超过预期目标,从而有效地杀灭松材线虫及其媒介昆虫,保证处理效果,为高效进行疫木无害化处理提供技术支撑。【Objective】Improving the efficiency of harmless treatment of pine wilt disease infected wood,enhance the high-value utilization of infected wood,and save production time and cost.【Method】The log of P.massoniana infected by pine wood nematode was studied,saturated steam treatment was adopted,and the core temperature was set at 65℃.The moisture content(MC≤50%,50%<MC≤90%,90%<MC≤120%,MC>120%)and wood diameter(D≤16 cm,18 cm≤D≤20 cm,22 cm≤D≤24 cm,26 cm≤D≤28 cm,D≥30 cm)on the effect of the heat transfer rate of P.massoniana of 1 m long,and the processing time was predicted by the mathematical model of“wood center thermometer algorithm”.【Result】When the diameter of P.massoniana is 20 cm,the total treatment time of wood core reaching 65℃increases by 20 min and the heating rate decreases by 0.37℃/h with an increase of 10%moisture content.When the MC of P.massoniana log is about 37%,the total treatment time of wood core reaching 65℃increases by 59 min and the heating rate decreases by 1.71℃/h with an increase of 2 cm diameter class;After saturated steam treatment,the MC of P.massoniana increased.The results of model prediction showed that the effect of MC and diameter on the total treatment time is similar to the actual results,and the simulated value of the total heat treatment time is greater than the actual value when the MC is less than 82%.【Conclusion】In the heat treatment process,MC and wood diameter have a great impact on the heat transfer rate of infected wood,and batch treatment of logs with similar diameter and MC can effectively improve the treatment efficiency.In actual production,the use of“wood central thermometer algorithm”to predict the total treatment time of infected wood of different diameters can ensure that the internal temperature of infected wood reaches or exceeds the expected target,so as to effectively kill pine wood nematodes and their vector insects,ensure the treatment effect,and provide technical support for efficient and harmless treatmen

关 键 词：传热 含水率 疫木径级 松材线虫病 数学模型 

分 类 号：S781[农业科学—木材科学与技术]