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含油钻屑的热解特性
Investigation of pyrolysis characteristics of oil-contaminated drill cuttings
投稿时间:2017-02-23  修订日期:2017-04-20
DOI:10.12030/j.cjee.201702140
中文关键词:  含油钻屑  热解  热红联用  固定床实验
英文关键词:oil-contaminated drill cutting  pyrolysis  TG-FTIR  fixed bed experiments
基金项目:国家自然科学基金资助项目(51576042)
作者单位
周浩 能源热转换及其过程测控教育部重点实验室, 东南大学, 南京 210096 
汪根宝 中国石化集团南京工程有限公司, 南京 211100 
李蒙 中国石化集团南京工程有限公司, 南京 211100 
张磊 中国石化集团南京工程有限公司, 南京 211100 
陈时熠 能源热转换及其过程测控教育部重点实验室, 东南大学, 南京 210096 
向文国 能源热转换及其过程测控教育部重点实验室, 东南大学, 南京 210096 
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中文摘要:
      在石油勘探和页岩气开采中会产生大量废弃含油钻屑,热解是实现含油钻屑废弃物资源化利用的有效途径。采用TG-FTIR研究了含油钻屑热解及产物分布特性,并在固定床上考察了温度以及热解时间对含油钻屑热解气和热解油的影响规律,对含油钻屑提取油与热解回收油成分进行了对比分析。结果表明:含油钻屑热解经历干燥脱气、轻质油热解、重质油分解和矿物质裂解4个过程;350~550℃时热解回收油与含油钻屑提取油中烃类物质组成相似,热解油可以循环利用;含油钻屑550℃下热解80 min,热解油回收率达65%,部分油发生裂解,残渣含油率仅为0.28%。
英文摘要:
      The exploration of petroleum and shale gas would produce oil-contaminated drill cuttings (OCDCs), and the pyrolysis has been proven to be an efficient and available technology in contaminants treatment and resource reuse. In this paper, the pyrolysis process of OCDC was analyzed in a thermal gravimetric analyzer with Fourier transforms infrared spectroscopy (TG-FTIR), and effects of temperature and pyrolysis time on the pyrolytic oil, non-condensable gas (NCG) and processed solids distributions were investigated in a fixed bed reactor. The extracted oil from cuttings and recovered oils were analyzed by gas chromatography-mass spectrometer (GC-MS). The results indicated that OCDC pyrolysis in TGA transited the following processes:drying and gas desorption, light oil pyrolysis, heavy oil cracking and cuttings decomposition. The hydrocarbons in recovered oils at 350 to 550℃ were similar to those in extracted oil and they could be returned as drilling fluids for utilization. It was also found that recovered oil yield was highest at 550℃ within 80 min of residence time and the recovery rate could be 65% where the residual oil content in processed solids was 0.28% for disposal.
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