石化加热炉烟气脱硝技术应用探讨

摘要

介绍了我国目前的氮氧化物排放限制标准及现阶段石化行业加热炉烟气中氮氧化物的排放现状.在目前的燃烧技术条件下,燃气加热炉通过采取控制燃烧措施后烟气中的氮氧化物浓度可达到现有排放标准的要求,而燃油加热炉烟气中氮氧化物的浓度仍会超过了现有的排放标准限制.为达到排放标准要求,应采用烟气净化措施,即烟气脱硝装置.介绍了烟气脱硝技术的工作原理和适用范围,并对其在石化行业加热炉上的应用进行了探讨.%The standard of Nox emission and status-quo of Nox emission in fired heater flue gas in petro-chemical industry in China are introduced. It is stated that the Nox in flue gas can meet the emission standard specifications if appropriate measures have been taken to control the combustion. With the existing combustion technology, the Nox in oil fired heater exceed the standard limitations. Therefore, flue gas purification measures , such as installation of denitration unit, should be adopted to meet the standard emission requirements. The working principles of flue gas denitration technology and applications are described and application in fired heater in petrochemical processing is studied.