蓄热式氧化炉在无机材料煅烧尾气处理中的应用
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摘要
分子筛煅烧尾气中含有三乙胺、正丁胺等挥发性有机化合物(VOCs),严重影响厂区及周边环境。为彻底治理有机废气污染,采用三床式蓄热式氧化炉(RTO)处理有机废气,通过优化调整控制工艺,以排烟温度控制法替代原有的排烟时间控制法。结果表明:排烟温度控制法可确保排烟温度保持在设计范围内,有效降低了排烟热损失;蓄热式氧化炉通过吸热-燃烧-放热周期性稳定运行,在天然气平均耗量4.5 m3·h-1的情况下,获得99%以上的VOCs去除效率,达到预期目标。蓄热式氧化法是一种经济、高效、稳定和安全的有机废气处理技术。
The calcined exhaust of the molecular sieve contains volatile organic compounds(VOCs) such as triethylamine and n-butylamine, which will make serious air pollution to the surroundings. To control the pollution of VOCs thoroughly, a three-bed regenerative thermal oxidizer(RTO) was adopted to dispose VOCs in present project. The original exhaust timing control method was replaced with the exhaust temperature control method by the optimized control process. The result shows that the exhaust gas temperature could be controlled within the design range and the exhaust heat loss could be reduced effectively by the exhaust temperature control method. The RTO operates through endothermic-combustion-exothermic periodically and stably. In the case of natural gas average consumption of 4.5 m3·h-1, the efficiency higher than 99% of VOCs removal was achieved, which exactly meet the desired objective. The regenerative thermal oxidation method could be an organic waste gas treatment technology with features of economy, efficiency, stabilization and safety.
The calcined exhaust of the molecular sieve contains volatile organic compounds(VOCs) such as triethylamine and n-butylamine, which will make serious air pollution to the surroundings. To control the pollution of VOCs thoroughly, a three-bed regenerative thermal oxidizer(RTO) was adopted to dispose VOCs in present project. The original exhaust timing control method was replaced with the exhaust temperature control method by the optimized control process. The result shows that the exhaust gas temperature could be controlled within the design range and the exhaust heat loss could be reduced effectively by the exhaust temperature control method. The RTO operates through endothermic-combustion-exothermic periodically and stably. In the case of natural gas average consumption of 4.5 m3·h-1, the efficiency higher than 99% of VOCs removal was achieved, which exactly meet the desired objective. The regenerative thermal oxidation method could be an organic waste gas treatment technology with features of economy, efficiency, stabilization and safety.
引文
[1] POULSEN T G, MOLDRUP P, YAMAGUCHI T, et al. VOC vapor sorption in soil:Soil type dependent model and implications for vapor extraction[J]. Journal of Environmental Engineering,1998,124(2):145-150. DOI:10.1061/(ASCE)0733-9372(1998)124:2(146).
[2]王波,马睿,薛国程,等.工业有机废气热氧化技术研究进展[J].化工进展,2017,36(11):4232-4242.
[3] SCHNELLE K B, BROWN C A. Air Pollution Control Technology Handbook[M]. New York:CRC Press,2002.
[4]童喜润,党杰,杨明德,等.蓄热催化氧化法处理挥发性有机物的研究进展[J].安徽化工,2004,30(1):40-43.
[5]陆震维.有机废气的净化技术[M].北京:化学工业出版社,2011.
[6]杨培法.热氧化工艺在有机废气及废液处理中的应用[J].能源环境保护,2016,30(1):21-25.
[7] BANNAI M, HOUKABE A, FURUKAWA M, et al. Development of efficiency-enhanced cogeneration system utilizing high-temperature exhaust-gas from a regenerative thermal oxidizer for waste volatile-organic-compound gases[J]. Applied Energy,2006,83:929-942. DOI:10.1016/j.apenergy.2005.10.005.
[8]杨振华,马晓驰,蔡鹏山,等.蓄热式热氧化器转化效率的研究[J].化工机械,2015(1):42-44.
[9]张建萍,项菲.浅析蓄热式热力氧化技术处理挥发性有机废气[J].浙江化工,2014(3):36-39.
[10]项兆邦,夏光华,叶剑. RTO技术治理挥发性有机废气工程应用研究[J].绿色科技, 2014(10):174-177.
[11]宋婧,曾令可,刘艳春,等.陶瓷蓄热体的研究现状及应用[J].中国陶瓷,2007,43(6):7-10.
[12]张振兴.基于均匀多孔介质模型的氧化床阻力特性数值研究[D].淄博:山东理工大学,2010.
[13]张志诚.蜂窝陶瓷蓄热体综合性能实验台监控系统开发与研究[D].淄博:山东理工大学, 2011.
[14]郑志伟,仇性启,祁风雷,等.蜂窝陶瓷蓄热体传热和阻力特性实验研究[J].石油化工设备,2013,42(1):9-13.
[15]中国建筑材料联合会.蜂窝陶瓷蓄热体:JC/T 2135-2012[S].北京:中国建材工业出版社,2013.
[2]王波,马睿,薛国程,等.工业有机废气热氧化技术研究进展[J].化工进展,2017,36(11):4232-4242.
[3] SCHNELLE K B, BROWN C A. Air Pollution Control Technology Handbook[M]. New York:CRC Press,2002.
[4]童喜润,党杰,杨明德,等.蓄热催化氧化法处理挥发性有机物的研究进展[J].安徽化工,2004,30(1):40-43.
[5]陆震维.有机废气的净化技术[M].北京:化学工业出版社,2011.
[6]杨培法.热氧化工艺在有机废气及废液处理中的应用[J].能源环境保护,2016,30(1):21-25.
[7] BANNAI M, HOUKABE A, FURUKAWA M, et al. Development of efficiency-enhanced cogeneration system utilizing high-temperature exhaust-gas from a regenerative thermal oxidizer for waste volatile-organic-compound gases[J]. Applied Energy,2006,83:929-942. DOI:10.1016/j.apenergy.2005.10.005.
[8]杨振华,马晓驰,蔡鹏山,等.蓄热式热氧化器转化效率的研究[J].化工机械,2015(1):42-44.
[9]张建萍,项菲.浅析蓄热式热力氧化技术处理挥发性有机废气[J].浙江化工,2014(3):36-39.
[10]项兆邦,夏光华,叶剑. RTO技术治理挥发性有机废气工程应用研究[J].绿色科技, 2014(10):174-177.
[11]宋婧,曾令可,刘艳春,等.陶瓷蓄热体的研究现状及应用[J].中国陶瓷,2007,43(6):7-10.
[12]张振兴.基于均匀多孔介质模型的氧化床阻力特性数值研究[D].淄博:山东理工大学,2010.
[13]张志诚.蜂窝陶瓷蓄热体综合性能实验台监控系统开发与研究[D].淄博:山东理工大学, 2011.
[14]郑志伟,仇性启,祁风雷,等.蜂窝陶瓷蓄热体传热和阻力特性实验研究[J].石油化工设备,2013,42(1):9-13.
[15]中国建筑材料联合会.蜂窝陶瓷蓄热体:JC/T 2135-2012[S].北京:中国建材工业出版社,2013.