独山子石化老区裂解炉低氮燃烧器改造

Transformation of Low NOX Burners of Cracking Furnaces in Old Ethylene Plant in Dushanzi

独山子乙烯装置(老区)采用美国Lummus技术,由英国斯乃姆公司承包设计建造,设计生产规模140 kt/a。经过2002年改造,由5台裂解炉扩建为7台,生产规模达到220 kt/a。2017年经过调整的裂解炉烟气中氮氧化物含量可以达到国家标准(<180 mg/m 3),但氮氧化物含量在170 mg/m 3左右波动,使得裂解炉操作调整范围小,无法满足大负荷生产的需求。为降低裂解炉烟气中氮氧化物含量,同时增大裂解炉操作调整范围,对独山子石化乙烯老区7台裂解炉燃烧器进行低氮改造,改造完成后要求氮氧化物含量达到新的小于100 mg/m 3的国家标准。

The old ethylene plant of PetroChina Dushanzi Petrochemical Company adopts the technology of Lummus( USA).It was designed and constructed by SNAM( UK) with a design capacity of 140 kt/a. In the transformation in 2002, it was expanded from 5 cracking furnaces to 7 cracking furnaces,and its capacity reached 220 kt/a. In 2017,the adjusted nitrogen oxide content in the flue gas of cracking furnace could meet the national standard( < 180 mg/m^3),but fluctuated around 170 mg/m^3,resulting in low operating flexibility of cracking furnace,so the demand of high load production could not be met. In order to reduce the nitrogen oxide content in the flue gas of cracking furnace and improve the operating flexibility of cracking furnace,the burners of the seven cracking furnaces in the old ethylene plant in Dushanzi were revamped for low nitrogen content. After the transformation,the nitrogen oxide content is required to be less than 100 mg/m^3 as stipulated in the new national standard.