HDPE与木屑热等离子体共蒸汽气化研究  

Study on Thermal Plasma Co-Gasification of Polyethylene and Wood Chips Mixtures Under Steam Environment

作　　者：覃思源 楚楚 王萍 马文超[1,2] QIN Siyuan;CHU Chu;WANG Ping;MA Wenchao(School of Environmental Science and Engineering,Tianjin University,Tianjin 300192;School of Environmental Science and Engineering,Hainan University,Haikou Hainan 570228)

机构地区：[1]天津大学环境科学与工程学院,天津300192 [2]海南大学环境科学与工程学院,海南海口570228

出　　处：《环境卫生工程》2024年第5期67-76,共10页Environmental Sanitation Engineering

基　　金：海南省重点研发计划项目(ZDYF2022SHFZ315)。

摘　　要：以高密度聚乙烯(HDPE)和木屑为研究对象,结合热力学分析和实验研究,探究等离子体气化过程中输入功率、HDPE质量分数以及水碳比(S/C)3种工况参数对氢气产率、合成气组分、氯的产物分布等影响规律,并基于吉布斯最小自由能原理进行热力学计算。模拟分析表明:输入功率由7.5 kW增至34.0 kW过程中,氢气占比在20 kW(对应温度为800℃)时达到最大值59%;随着原料中HDPE质量分数由0增至100%,氢气占比由65%减少至56%;S/C为0时,氢气占比最高(80%),随着S/C由0增至3.0,氢气占比呈现不断减小的趋势;氯在气相中产物主要以KCl(g)、(KCl)_(2)(g)为主。实验研究表明:输入功率、HDPE质量分数和S/C对产氢量的影响趋势与热力学分析一致,在输入功率为22 kW、HDPE质量分数为80%、S/C为1.0时,最优产氢量分别达到1.52、1.51、1.38 m^(3)/kg。氯的气相占比分别在功率为22 kW、HDPE质量分数为20%、S/C为1.4时达到最高。通过对比实验结果验证了热力学模拟对等离子体气化产物特性进行定性定量分析的潜力,探索了采用热力学计算模拟生物质和HDPE等离子体共气化的可行性,并可为等离子体气化的操作优化和氯控制提供借鉴。With high-density polyethylene(HDPE)and sawdust as the research objects,combined with thermodynamic analysis and experimental research,the influence rule of input power,HDPE mass ratio and steam-to-carbon ratio(S/C)on hydrogen production rate,gas product composition,and chlorine release behavior in the process of plasma gasification were investigated.Moreover,thermodynamic calculations was conducted based on the Gibbs minimum free energy principle.Simulation analysis revealed that increasing input power from 7.5 kW to 34.0 kW resulted in a maximum hydrogen proportion rate of 59%at 20 kW(corresponding temperature at 800℃).As HDPE mass ratio increased from 0 to 100%,the hydrogen production rate decreased from 65%to 56%.When S/C was 0,the proportion of hydrogen was the highest(80%),and with S/C increased from 0 to 3.0,the proportion of hydrogen showed a decreased trend.Chlorine products in the gas phase mainly comprised KCl(g)and(KCl)_(2)(g).Experimental results confirmed the consistency between the effects of input power,HDPE mass ratio,and S/C on hydrogen production with thermodynamic analysis.When the input power was 22 kW,the proportion of HDPE raw material was 80%and S/C was 1.0,the optimal hydrogen production were 1.52 m^(3)/kg,1.51 m^(3)/kg and 1.38 m^(3)/kg,respectively.Gas-phase chlorine distribution reached the highest when the input power was at 22 kW,HDPE mass distribution of 20%and S/C of 1.4.Comparison of the experimental results validated the potential of thermodynamic simulation for qualitative and quantitative analysis of plasma gasification products.The feasibility of using thermodynamic calculation to simulate the co-gasification of biomass and HDPE plasma was explored,which could provide reference for the operation optimization and chlorine control of plasma gasification.

关 键 词：等离子体气化 木屑 高密度聚乙烯(HDPE) 氯产物分析 热力学平衡 氢 

分 类 号：X705[环境科学与工程—环境工程]