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低氧燃烧技术在常压加热炉中的应用
Application of Hypoxic Combustion Technology in Atmospheric Pressure Heating Furnace
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- DOI:
- 作者:
- 丁长胜
Ding Changsheng
- 作者单位:
- 中国石油锦州石化公司
PetroChina Jinzhou Petrochemical Company
- 关键词:
- 低氧燃烧；加热炉；氧含量；CO调控；NOx减排
hypoxic combustion; heating furnace; O2 content; CO regulation; NOx emission reduction
- 摘要:
- 为解决加热炉效率偏低、过剩空气量偏多等问题，某石化公司在炼油一部二常常压炉（L701）系统节能优化改造项目中应用低氧燃烧技术。该技术通过实时监测并调控CO和氧含量来反馈调节鼓风机变频运行，从而实现加热炉进风量的精准调控。通过系统构建基于理论空燃比的燃烧优化控制系统，动态调节过剩空气系数，使加热炉实际燃烧工况趋近于理论完全燃烧状态；提高了热效率，降低燃料消耗量，减少CO2和NOx的排放总量。经标定测试，该系统投用后炉膛的氧含量由 1.91%降低至 0.89%，加热炉热效率从 92.89%提升至 93.12%。NOx排放降低25.83%，节省燃料366.78 t/a，节约燃料费用91.69万元/a。该技术为石化行业加热炉的节能减排和绿色低碳运行提供了兼具经济性和环保性的技术方案，具有推广意义和工程应用价值。Jinzhou Petrochemical Company adopts low oxygen combustion technology in the second pressure furnace of the first partof the refinery through the system energy conservation optimization and transformation project, and uses CO and oxygen contentselection control to adjust the frequency conversion of the blower, and then controls the inlet air volume of the heating furnace, so asto achieve the optimal control of the theoretical ratio combustion of the heating furnace, reduce the amount of excess air, make theactual combustion close to the theoretical ratio combustion state, improve the thermal efficiency of the heating furnace, save fueluse, and reduce CO2 and NOx emissions. It is reduced to 0.89%, and the thermal efficiency of the heating furnace is increased by0.23%. Nitrogen oxides are reduced by 25.83%, which provides a new technology and solution for energy conservation, emissionreduction, green and low-carbon operation of other heating furnaces, and has promotion and application value.