关键词: 蒸汽系统, 燃料结构, 用能结构, 设备效能, 蒸汽损耗, 优化, 节能, 降碳

Abstract: This paper analyzes the main problems of decentralized steam system layout, many types of fuels, obvious increase in fuel cost, low operation efficiency of turbine and boiler and high self consumption loss of SINOPEC Beijing yanshan Petrochemical Co.,Ltd., and puts forward and implements optimization and improvement measures such as pressure raising transformation of natural gas system, adjustment of energy consumption structure, reduction of energy consumption cost, improvement of steam production quality and equipment efficiency. The results show that compared with the fuel consumption in 2018, the consumption of coal coke will be reduced by 550,000 t, the consumption of natural gas will be increased by 170,000 t, and the total consumption of fuel gas and fuel oil will be increased by 50,000 t, equivalent to 246,000 t of standard coal; Increase purchased electricity by about 5×10⁸ kW·h; Green power trading and 14.76 MW distributed photovoltaic projects are carried out. According to the calculation of 1 400~1 600 h annual power generation in class Ⅱ photovoltaic areas and the emission factor of North China regional power grid baseline, the annual emission reduction is about 55,000 t carbon dioxide in 2021. After the above transformation, the goal of zero-coking is achieved, the steam consumption of the unit is reduced by 21.5%, the steam production of the boiler is reduced by 24.9%, and the annual emission reduction of about 760,000 t carbon dioxide is achieved, which has achieved good results.

Key words: steam system, fuel structure, energy structure, equipment efficiency, steam loss, optimization, energy saving, carbon reduction