Abstract: Petrochemical enterprises in Northeast China mainly produced fuel hydrogen from natural gas; the gas units included crude distillation unit, reforming unit, hydro-treating unit, catalyst unit, ethylene unit, delayed coking unit, molecular sieve dewaxing unit, benzene and styrene unit. About （25~30）×10⁴ m³ gas was consumed for one petrochemical enterprise processing ten million tons of crude oil per annum. The main factors that affected the total amount of natural gas consumption included alternative energy, seasonal variation, maintenance, market, emergencies, etc. The calculation of natural gas price bearing capacity with the surrogate worth trade off method showed the price of alternative energy such as naphtha and liquefied gas directly affected the economy of natural gas utilization. Clarifying the use regulation and economic characteristics of nature gas in petrochemical enterprises was conducive to optimizing the plan design of gas utilization, controlling cost and coordinating with the upstream gas suppliers.

Key words: Petrochemical,    , Natural gas,    , Economic,    , Characteristics of natural gas utilization

摘要：         东北地区石化企业主要利用天然气制氢和作燃料,用气装置包括原油蒸馏装置、重整装置、加氢装置、催化裂化装置、乙烯装置、延迟焦化装置、分子筛脱蜡装置、烷基苯装置、苯乙烯装置等。年加工原油1000×10⁴ t的石化企业日用天然气量为(25~30)×10⁴  m3,影响天然气用量的主要因素包括可替代能源、季节、维检修、市场、突发事件等。应用替代价值法对天然气价格承受能力进行计算的结果表明,石脑油、液化气等可替代能源价格的高低直接影响天然气利用的经济性。理清石化企业用气特征和经济性,有利于企业用气计划的制定、成本控制及与上游供气单位的协调。

关键词: 石化,   ,  天然气,   ,  经济性,   ,  用气特征