蓄热排气处理装置的研究综述

近年来,蓄热式热氧化焚烧炉(RTO)已成为处理工业有机废气的主要技术之一。通过高温空气燃烧技术降低氮氧化物的生成量和减少废气中挥发性有机化合物(VOCs)含量,能有效解决大气污染问题。综述了蓄热式燃烧技术的发展历程以及主要应用领域,分析了蓄热式燃烧技术的2个重要参考指标即压降及热效率。蓄热体是蓄热式热氧化焚烧炉的重要组成部分,其材质密度、形状及尺寸会直接影响VOCs排放量和氮氧化物的生成量。常见的蓄热体材料为陶瓷复合材料,重点分析了LanteComb-H、40×40孔蜂窝陶瓷、25 mm矩鞍环、MLM-180片状组合蜂窝陶瓷蓄热体对RTO设备压力损失和热效率的影响,结果表明LanteComb-H具有压降小、热效率高的优点。提出优化蓄热体结构以解决RTO设备运行过程可能出现的安全隐患是未来研究的热点。

Research Review of Heat Storage and Exhaust Treatment Equipment

In recent years, regenerative thermal oxidizer(RTO) has become one of the main technology for processing industrial organic waste gas. The production of nitrogen oxides and the content of volatile organic compounds(VOCs) in the exhaust gas are reduced by using high-temperature air combustion technology, which can effectively solve the problem of air pollution. The development history and main application fields of regenerative combustion technology were summarized. The two important reference indexes of regenerative combustion technology, namely pressure drop and thermal efficiency, were analyzed. As an important part of RTO, the material density, shape and size of the regenerative thermal oxidation incinerator will directly affect the amount of VOCs emissions and NO_x production. Ceramic composite is the common regenerator material. The influences of LanteComb-H, 40×40 hole honeycomb ceramic, 25 mm moment saddle ring and MLM-180 sheet composite honeycomb ceramic heat accumulator on the pressure drop and thermal efficiency of RTO equipment were mainly analyzed. The results show that LanteComb-H has the advantages of small pressure drop and high thermal efficiency. It was proposed that optimizing the structure of regenerator to solve the potential safety hazards during the operation of RTO equipment was the focus of future research.