炼油联合装置节能减排优化措施

Measures for Saving Energy and Reducing Emission for Integrated Oil Refining Units

巴陵石化炼油联合装置以105×104t/a MIP-CGP装置为核心,配套产品精制、气体分离及循环水、空压站等公用工程系统。该装置直接以200×104t/a常压装置的渣油为原料,具有多产高辛烷值汽油和气体烯烃的特点。针对重油催化装置高气体收率和大注汽量的工艺特点,从催化生焦理论入手,进一步分析了随着进料密度、残炭和重金属含量的增加,装置的能耗越显著,联合装置的用能优化越复杂。通过对再生器取热系统、烟气余热回收系统、蒸汽能量梯级利用、烟机系统、供风系统、加热炉燃烧器系统、高低温位热能回收以及循环水、酸性水、凝结水系统的用能分析及优化改造,充分综合利用了各类能源,减少了装置对水的消耗。炼油联合装置能耗由72.20kg标油/t原油降至61.74kg标油/t原油,吨原油取水由0.72t/t降至0.61t/t,吨原油排水由0.64t/t降至0.30t/t。

The key component of Sinopec Baling Company′s integrated refining unit is a 105×104t/a MIP-CGP unit and other supporting utility facilities include product refining units,gas separators,circulating water system and air compressor stations.The unit directly uses the residual oil from a 200 ×104t/a atmospheric distillation unit as feedstock and has high yields of high-octane gasoline products and gaseous olefin.Having regard to RFCCUs′ characteristics of high gas yields and high steam injection volumes,technicians analyzed the correlation between the increases in feed density and contents of residual carbon and heavy metals,the rise in energy consumption of RFCCUs and the higher complexity of energy efficiency enhancement for integrated units.By analyzing and optimizing the energy consumption of the heat removing system of regenerators,the flue gas waste heat recovering system,the steam power cascade utilization system,the flue gas turbine system,the air supply system,the heater burner system,the high/low temperature heat recovering system and the circulating water,acidic water and condensate water systems,they made the best use of all types of energy sources available and reduced the unit′s water use.As a result,the energy consumption of the integrated refining unit dropped to 61.74kg of oil equivalent per ton of crude oil processed from 72.20kg of oil equivalent,the water use per ton of crude oil processed fell to 0.61t/t from 0.72t/t and the amount of water discharged in processing one ton of crude oil dropped to 0.30t/t from 0.64t/t.