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煤直接液化残渣掺烧的燃烧特性及其苯系物的排放特征

董子平 闫大海 何 洁 罗 琳 黄泽春

董子平, 闫大海, 何 洁, 罗 琳, 黄泽春. 煤直接液化残渣掺烧的燃烧特性及其苯系物的排放特征[J]. 环境科学研究, 2015, 28(8): 1253-1259.
引用本文: 董子平, 闫大海, 何 洁, 罗 琳, 黄泽春. 煤直接液化残渣掺烧的燃烧特性及其苯系物的排放特征[J]. 环境科学研究, 2015, 28(8): 1253-1259.
DONG Ziping, YAN Dahai, HE Jie, LUO Lin, HUANG Zechun. Combustion Properties and Benzene Compound Emission Characteristics of Coal Liquefaction Residual Co-Combustion[J]. Research of Environmental Sciences, 2015, 28(8): 1253-1259.
Citation: DONG Ziping, YAN Dahai, HE Jie, LUO Lin, HUANG Zechun. Combustion Properties and Benzene Compound Emission Characteristics of Coal Liquefaction Residual Co-Combustion[J]. Research of Environmental Sciences, 2015, 28(8): 1253-1259.

煤直接液化残渣掺烧的燃烧特性及其苯系物的排放特征

基金项目: 国家环境保护公益性行业科研专项(201209023)

Combustion Properties and Benzene Compound Emission Characteristics of Coal Liquefaction Residual Co-Combustion

  • 摘要: 为分析煤直接液化残渣(液化渣)燃烧处置技术的可行性和环境安全性,采用热重分析仪分析了液化渣、煤和掺烧物料的燃烧特性,并且通过管式炉模拟燃烧试验,研究了不同温度下掺烧过程中苯系物的排放特征. 结果表明:煤和液化渣的燃烧特性及二者在燃烧过程中苯系物的排放特征存在较大差异,液化渣主要失重过程的温度区间为560~820 ℃,明显高于煤的主要失重过程温度区间(230~625 ℃). 从燃烧过程苯系物的排放规律上看,液化渣在700 ℃燃烧时苯系物排放量达到最大值,明显高于煤的燃烧温度(500 ℃). 2种物料由于燃烧特性的差异,在掺烧过程中相互影响,使得掺烧过程苯系物的排放规律发生变化. 掺烧物料在500 ℃下燃烧的苯系物排放量为23.5 mg/kg,远小于燃烧理论值;而当温度高于700 ℃,苯系物排放量为172.6 mg/kg,远大于燃烧理论值. 总体上看,液化渣无论是单独燃烧还是掺烧,低温条件下其燃烧过程中苯系物排放量远大于高温(≥850 ℃)条件下,因此液化渣的燃烧处置或燃料化利用应选择高温炉型.

     

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  • 刊出日期:  2015-08-25

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