欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2020, Vol. 20 ›› Issue (4): 467-475.DOI: 10.12034/j.issn.1009-606X.219253

• 环境与能源 • 上一篇    下一篇

含PVC混合塑料水热反应中的氯迁移特性

杨茂林1， 李 田2， 黄 能1， 赵培涛1,3*， 郭庆杰4   

  1. 1. 中国矿业大学电气与动力工程学院，江苏 徐州 221116 2. 徐州徐工环境技术有限公司，江苏 徐州 221001 3. 国家煤加工与洁净化工程技术研究中心，江苏 徐州 221116 4. 宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室，宁夏 银川 750021
  • 收稿日期:2019-07-18 修回日期:2019-08-22 出版日期:2020-04-22 发布日期:2020-04-20
  • 通讯作者: 杨茂林 2429524993@qq.com
  • 基金资助:
    PVC水热脱氯过程中氯形态分布及迁移特性研究;高硫低质煤水热提质中流迁移特性;高水、高硫低阶煤水热提质过程中硫迁移特性及机理研究

Chlorine migration characteristics in hydrothermal reaction of mixed plastics containing PVC

Maolin YANG1, Tian LI2, Neng HUANG1, Peitao ZHAO1,3*, Qingjie GUO4   

  1. 1. School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China 2. XCMG Xuzhou Environmental Technology Co., Ltd., Xuzhou, Jiangsu 221001, China 3. National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China 4. State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, Ningxia 750021, China
  • Received:2019-07-18 Revised:2019-08-22 Online:2020-04-22 Published:2020-04-20

PDF

摘要： 聚氯乙烯(PVC)的大量使用导致城市生活垃圾(MSW)中的氯含量相对较高。水热反应将氯尤其是有机氯高效脱除是实现垃圾无害化处理和资源化利用的前提。MSW中塑料组分复杂，有机氯主要来源于PVC，研究影响PVC水热脱氯中氯迁移特性的因素具有重要意义。选取两种型号(HB-65和S-65)的PVC和聚乙烯(PE)、聚丙烯(PP)、聚苯乙烯(PS)、丙烯腈-丁二烯-苯乙烯(ABS)作为原料，研究了PVC自身性能和水热条件对氯脱除的影响规律，考察了塑料混合水热过程中的氯迁移特征。结果表明，PVC自身性能是影响水热脱氯内在因素，水热条件如水热温度、保温时间和反应物浓度是外在因素。塑料因不同的热膨胀性在混合水热过程中存在协同效应，添加PP和ABS使PVCHB-65脱氯率分别下降了71.66%和70.96%，使PVCS-65脱氯率分别下降了19.05%和18.15%；添加PE和PS使PVCHB-65脱氯率分别下降了71.06%和43.06%，使PVCS-65脱氯率分别升高了8.20%和46.70%。

关键词: 城市生活垃圾, 混合塑料, PVC, 水热脱氯, 协同作用

Abstract: The high chlorine content in municipal solid waste (MSW) was caused by the large use of polyvinyl chloride (PVC). The efficient removal of chlorine, especially organic chlorine, by hydrothermal reaction was the premise to achieve harmless treatment and resource utilization of waste. The plastic components in MSW were complex and organic chlorine mainly came from PVC. Therefore, it was of great significance to study the factors affecting chlorine migration characteristics in PVC hydrothermal dechlorination. Two types of PVC (HB-65 and S-65) and polyethylene (PE), polypropylene (PP), polystyrene (PS), acrylonitrile-butadiene-styrene (ABS) were selected as raw materials to explore the effects of PVC's own performance and hydrothermal conditions on chlorine removal and investigate the characteristics of chlorine migration in the hydrothermal reaction of mixed plastics. The results showed that PVC's own performance was the internal factor affecting the hydrothermal dechlorination. Hydrothermal conditions such as hydrothermal temperature, residence time and reactant concentration were the key external factors affecting the hydrothermal dechlorination. There was a synergistic effect in the mixed plastics hydrothermal reaction due to different thermal expansion. The addition of PP and ABS decreased the dechlorination rate of PVCHB-65 by 71.66% and 70.96%, respectively, and decreased the dechlorination rate of PVCS-65 by 19.05% and 18.15%, respectively. The addition of PE and PS decreased dechlorination rate of PVCHB-65 by 71.06% and 43.06% respectively, while increased the dechlorination rate of PVCS-65 by 8.20% and 46.70%, respectively.

Key words: MSW, Mixed plastics, PVC, Hydrothermal dechlorination, Synergy