首页|报废风机叶片热处理特性及动力学分析

报废风机叶片热处理特性及动力学分析

Thermal treatment characteristics and kinetic analysis of decommissioned wind turbine blades

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  • 国家科技期刊平台
  • NETL
  • NSTL
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为研究退役风机叶片热处理特性,开展风机叶片的玻璃纤维/环氧树脂风机叶片材料4个不同升温速率(5、10、20、40℃·min-1)及2种载气氛围(氮气、空气)的热重实验,结合动力学方法对各个反应过程进行研究.热重分析表明玻璃纤维/环氧树脂风机叶片在氮气氛围下存在2个失重阶段,500 ℃以后质量基本稳定;在空气氛围下存在3个失重阶段,600 ℃以后质量基本稳定,说明氧气的参与影响了玻璃纤维/环氧树脂的热分解特性.对比不同升温速率下的TG/DTG曲线,随升温速率的提高,TG曲线逐渐向高温方向移动,DTG曲线最大失重率逐渐降低,整个反应过程的质量损失也发生小幅下降.使用Kissinger-Akahira-Sunose(KAS)和Flynn-Wall-Ozawa(FWO)方法研究其动力学过程,结果表明在热解和氧化反应条件下用2种动力学模型求解的活化能取值范围分别为135.14～207.24、137.64～207.58kJ·mol-1 和 117.95～172.19、119.31～173.22kJ·mol-1,平均值分别为 179.30、180.44kJ·mol-1 和 141.18、143.15kJ·mol-1,同一反应下KAS和FWO法求得的数据具有一致性.使用Coats-Redfern(CR)法对反应过程的机理模型进行研究,结果表明热解过程符合随机成核随后生长机理(A1/2)模型,氧化过程符合反应级数为3级的反应机理(F3)模型.本研究可为大规模周期性报废的风机叶片高效处置和资源化回收利用提供重要理论和方法借鉴.
To examine the thermal treatment characteristics of decommissioned wind turbine blades,thermogravimetric analyses were conducted on glass fiber/epoxy resin wind turbine blades under various heating rates(5、10、20、40 ℃·min-1)and in two distinct atmospheres(nitrogen and air).Each reaction process was meticulously analyzed using kinetic methods.The thermogravimetric results revealed two distinct weight loss stages for the blades in nitrogen atmosphere,stabilizing in mass post 500 ℃.In an air atmosphere,three weight loss stages were observed,with mass stabilization occurring post 600 ℃.This suggests that the presence of oxygen significantly influences the thermal decomposition of glass fiber/epoxy resin.TG/DTG curve comparisons at different heating rates indicated a high-temperature shift of the TG curve with increasing heating rate,a gradual decrease in the peak weight loss of the DTG curve,and a slight reduction in overall mass loss during the reaction.The kinetic processes were scrutinized using the Kissinger-Akahira-Sunose(KAS)and Flynn-Wall-Ozawa(FWO)methods.The activation energies determined for pyrolysis and oxidation reactions using these kinetic models ranged from 135.14～207.24 kJ·mol-1,137.64～207.58 kJ·mol-1,117.95～172.19 kJ·mol-1,119.31～173.22 kJ·mol-1,with mean values of 179.30 kJ·mol-1,180.44 kJ·mol-1,141.18 kJ·mol-1,143.15 kJ·mol-1,respectively.The KAS and FWO methods applied to analyze identical reactions,produced congruent data sets.The mechanistic model of the reaction process was explored using the Coats-Redfern(CR)method.The results indicated that the pyrolysis process followed an A1/2 mechanism,while the oxidation process conformed to the F3 mechanism.This study provides significant theoretical and methodological references for the effective disposal and resource recycling of large-scale periodic decommissioned wind turbine blades.

decommissioned wind turbine bladesglass fiber/epoxy composite materialTG/DTG curvesthermal treatment characteristickinetic model

刘奇奇、董莉、徐同宽、刘景洋

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中国环境科学研究院国家环境保护生态工业重点实验室,北京 100012

大连工业大学轻工与化学工程学院,大连 116034

报废风机叶片 玻璃纤维/环氧树脂复合材料 TG/DTG曲线 热处理特性 动力学模型

中国环境科学研究院国家环境保护生态工业重点实验室开放基金中央级公益性科研院所基本科研业务费专项

2022KFF-152022YSKY-09

2024

10.12030/j.cjee.202311113

环境工程学报
中国科学院生态环境研究中心

环境工程学报

CSTPCD北大核心
影响因子：0.804
ISSN：1673-9108
年,卷(期)：2024.18(3)
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