石油炼制与化工 ›› 2020, Vol. 51 ›› Issue (1): 97-100.

• 安全与环保 • 上一篇    下一篇

影响催化裂化再生烟气中NOx浓度的因素及控制方法

郭伟,李宁,白锐,程相民   

  1. 中国石化海南炼油化工有限公司
  • 收稿日期:2019-08-20 修回日期:2019-10-15 出版日期:2020-01-12 发布日期:2020-01-19
  • 通讯作者: 郭伟 E-mail:guow.hnlh@sinopec.com
  • 基金资助:
     

FACTORS AFFECTING NOx CONCENTRATION IN FCC FLUE GAS AND CONTROL METHODS

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  1. SINOPEC Hainan Refining & Chemical Company
  • Received:2019-08-20 Revised:2019-10-15 Online:2020-01-12 Published:2020-01-19
  • Supported by:
     

摘要: 中国石化海南炼油化工有限公司2.8 Mt/a重油催化裂化装置在2018年第四周期开工后出现外排烟气NOx质量浓度接近排放限值200 mg/m3的情况,成为制约装置加工负荷的瓶颈。以催化裂化焦炭中氮的转化机理为切入点,从原料油、再生器操作、余热锅炉操作3个方面进行分析,查找影响因素,最终利用源头控制、操作条件、应用助剂3种措施,使外排烟气NOx浓度得到有效控制。

关键词: 催化裂化, 氮氧化物, 烟气, 原料油

Abstract: After the start-up of the fourth cycle of the 2.8 Mt/a heavy oil catalytic cracking unit of SINOPEC Hainan Refining & Chemical Co. Ltd. in 2018, the NOx concentration in flue gas was close to the emission limit of 200 mg/m3 and became a bottleneck restricting the processing load of the unit. In this paper,based on the transformation mechanism of nitrogen in FCC coke, the properties of feedstock,the operations of regenerator and waste heat boiler were analyzed to find the influence factors. Finally,the feed control,operating conditions and additives were determined to control the NOx concentration of the flue gas.

Key words: fluid catalytic cracking, NOx, flue gas, feedstock

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