洁净煤技术

2019, v.25;No.124(06) 10-18

[打印本页] [关闭]
本期目录(Current Issue) | 过刊浏览(Past Issue) | 高级检索(Advanced Search)

现代煤化工企业VOCs排放源项解析及排放量核算
Analysis and accounting of VOCs emission sources in modern coal chemical plants

张凯;刘舒予;向杉;张延斌;陈梦圆;
ZHANG Kai;LIU Shuyu;XIANG Shan;ZHANG Yanbin;CHEN Mengyuan;School of Chemistry & Environmental Engineering,China University of Mining and Technology(Beijing);CNN Energy;

摘要(Abstract):

VOCs排放量核算是开展VOCs污染防控工作的基础,目前煤化工领域未有相关核算指南与规范出台,因此参考《石化行业VOCs污染源排查工作指南》,对西北某煤制烯烃项目VOCs排放源项进行识别,分别采用实测、物料衡算、模型/公式及排放系数等方法对各VOCs排放源项的排放量进行核算,并对比煤化工行业较石化行业在核算结果上的异同,旨在解析各源项VOCs排放的贡献率以及源项内部的排放情况,为现代煤化工行业VOCs排放核算及源项分析提供理论与实践基础,也为后续的VOCs管控治理提供参考。结果表明,该煤制烯烃项目有VOCs排放源13项,其中可核算排放源7项,VOCs总排放量为1 686.502 t/a;重点环节VOCs排放量贡献度分别为废水收集与处理29.46%、循环冷却水27.30%、储罐17.52%、设备密封点16.66%、燃烧烟气5.53%、工艺废气3.13%、装卸0.39%。相比于传统石化行业储罐是最大污染源项,煤化工行业中最主要的污染源项是废水收集与处理以及循环冷却水,其中废水收集过程占是废水收集与处理源项的94.67%。烯烃分离装置与2-PH装置是主要VOCs泄露装置,一端开放式阀或管线是煤化工行业主要的泄露密封点。甲醇罐区是储罐的重点泄露区域。建议煤化工企业主要对废水收集与处理和循环冷却水2个重点源项加强密闭管控,并设置废气收集与集中处理装置对不同特性的污染针对性处理。
VOCs emission accounting is the basis of VOCs Pollution Prevention and control. At present,no relevant accounting guideline and specification has been issued in the field of coal chemical industry. Referring to "Guidelines for VOCs Pollution Source Investigation in Petrochemical Industry",in this paper,the VOCs emission source of a coal-to-olefin project in Northeast China was identified and cal-/formula and experience factor. The similarities and differences of accounting results between coal chemical industry and petrochemical industry were compared.The contribution rate of VOCs emission from different sources and the internal emission of sources were quantified and analyzed. The purpose of this paper is to provide theoretical and practical basis for VOCs emission accounting and source term analysis of modern coal chemical industry,and provide reference for the follow-up VOCs management and control. The results indicate that there/a. The contributions of VOCs emission sources in the coal-to-olefin project are listed as follows: wastewater collection and treatment 29. 46%,circulating cooling water 27.30%,tank 17.52%,equipment leak 16.66%,stationary combustion 5.53%,process vents 3.13%,loading0.39%. Compared with the traditional petrochemical industry and the coal chemical industry,the largest pollution source of the former is usually the storage tank,while the main pollution source of the latter is wastewater collection and treatment and circulating cooling water,in which the wastewater collection process accounts for 94.67% of the wastewater collection and treatment. Olefin separation unit and 2-PH unit are the main VOCs leakage devices,and one end of the open valve or pipeline is the main leakage sealing point. Methanol tank area is the key leakage area of tanks.Coal chemical enterprises should strengthen the closed control of the two key source items of wastewater collection and treatment and circulating cooling water,and set up waste gas collection and centralized treatment devices for targeted treatment of different characteristics of pollution.

关键词(KeyWords): 现代煤化工;挥发性有机物(VOCs);排放源;排放量核算
modern coal chemical industry;volatile organic compounds(VOCs);emission sources;emission accounting

Abstract:

Keywords:

基金项目(Foundation): 中国矿业大学(北京)越崎青年学者资助项目(2019QN08);; 中央高校基本科研业务费专项资金资助项目(2018QH03)

作者(Author): 张凯;刘舒予;向杉;张延斌;陈梦圆;
ZHANG Kai;LIU Shuyu;XIANG Shan;ZHANG Yanbin;CHEN Mengyuan;School of Chemistry & Environmental Engineering,China University of Mining and Technology(Beijing);CNN Energy;

Email:

参考文献(References):

文章评论(Comment):

序号(No.) 时间(Time) 反馈人(User) 邮箱(Email) 标题(Title) 内容(Content)
反馈人(User) 邮箱地址(Email)
反馈标题(Title)
反馈内容(Content)
扩展功能
本文信息
服务与反馈
本文关键词相关文章
本文作者相关文章
中国知网
分享