生物质疫木热处理炉热处理过程仿真模型的构建  

Simulation Model Construction for Heat Treatment Process of Biomass PWD-infected Wood Heat-treatment Furnace

作　　者：商广帅 于涛[1] 孙伟伦 Shang Guangshuai;Yu Tao;Sun Weilun(Shandong Jianzhu University,Jinan 250101,P.R.China;Harbin Sunlight Yafeng Science and Technology Development,CO.,LTD)

机构地区：[1]山东建筑大学,济南250101 [2]哈尔滨三立雅风科技开发有限公司

出　　处：《东北林业大学学报》2023年第10期129-137,共9页Journal of Northeast Forestry University

基　　金：国家重点研发计划课题(2021YFD1400905)。

摘　　要：以自制的生物质疫木热处理炉(SLYF-21)为疫木热处理设备(疫木采伐粉碎剩余物为燃料)、以疫木为试验材料,借鉴控制方程、湍流模型、混合(Mixture)模型、离散坐标(DO)辐射模型,构建疫木处理炉内多物理场耦合的热处理过程仿真模型,模拟遴选适宜的疫木热处理工艺参数。2022年7月14日,在山东省威海市荣成市,应用生物质疫木热处理炉对黑松(Pinus thunbergii)疫木进行热处理试验(热处理7 h),测定不同热处理时间时的各监测点温度,并与模拟结果进行对比,检验模型可靠性。采用试验与数值模拟相结合的方法,分析疫木直径、含水率、热处理环境温度对热处理时间的影响,遴选适宜的疫木热处理工艺参数。结果表明:炉内不同位置,疫木与环境的传热强度差异明显;木堆下部疫木温度高于上部、木堆内部疫木温度低于外围,木堆中心位置是传热的不利位置,应作为疫木中心温度监测的重点区域。疫木直径增加、环境温度降低、含水率增大,均会导致疫木热处理所需热量的增加和所需时间的延长,而且环境温度对热处理时间的影响最为显著;寒地环境时,可通过调整风机频率、增加炉体保温材料等措施提高炉体内升温速度,弥补低温环境对热处理时间的影响。结合试验结果,推荐6种典型工况下彻底杀灭疫木中松材线虫及媒介昆虫所需的热处理时间。A self-made biomass epidemic wood heat treatment furnace(SLYF-21)was adopted as the PWD-infected wood heat treatment equipment,with the crushed residual of PWD-infected wood as fuel,and the PWD-infected wood as experimental materials.To determine the suitable process parameters for PWD-infected wood heat treatment process,the governing equations,turbulence models,mixture models,and discrete coordinate(DO)radiation models for reference were combined to establish a simulation model for the multi physical field coupling heat treatment process in the PWD-infected wood treatment furnace.On July 14,2022,a biomass PWD-infected wood heat treatment furnace was used to conduct heat treatment experiments on the PWD-infected wood of Pinus thunbergii in Rongcheng City.The temperature of each monitoring point at different heat treatment times was measured,compared with the simulation results.By combining experimental and numerical simulation methods,the effects of the wood diameter,moisture content,and environment temperature on heat treatment time were analyzed,and suitable heat treatment process parameters for PWD-infected wood were recommend.There was a significant difference in heat transfer intensity between PWD-infected trees and the environment at different locations.The temperature of the PWD-infected wood in the lower part of the pile is higher than that in the upper part,and the temperature of the PWD-infected wood inside the pile is lower than that in the outer part.The central position of the pile is an unfavorable position for heat transfer and should be a key area for monitoring the center temperature of the PWD-infected wood.An increase in the diameter of PWD-infected wood,a decrease in environmental temperature,and an increase in moisture content can all lead to an increase in the amount of heat required and an extension of heat treatment time for PWD-infected wood,and the impact of environmental temperature on heat treatment time is most significant.In cold environments,measures such as adjusting the frequency

关 键 词：疫木 木材热处理 疫木热处理炉 松材线虫病 

分 类 号：S781.7[农业科学—木材科学与技术] S781.5[农业科学—林学]