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九江石化聚丙烯装置采用国产化单环管液相本体聚合工艺和DCS、ESD控制技术,于1998年6月投产,原设计产能为70kt/a,2002年通过扩能改造,实际产能达到120kt/a以上。该装置设计能耗为186kg标油/t聚丙烯,设计各工质单耗分别为新鲜水0.5t/t,能耗为0.09kg标油/t;循环水150t/t,能耗为15kg标油/t;1.0MPa蒸汽0.4t/t,能耗为30kg标油/t;脱盐水0.2t/t,能耗为0.5kg标油/t;电耗467t/t,能耗为140kg标油/t。随着聚丙烯新工艺、新技术的工业化应用,单环管工艺聚丙烯装置在产品竞争力上渐趋劣势。对该装置能耗进行分析,确立电能、循环水、蒸汽是影响装置能耗的主要因素;并从工艺操作、设备运行以及技术改造等方面实施节能优化,该装置2013年能耗(90.46kg标油/t)较2011年和2012年分别下降15.84kg标油/t和7.99kg标油/t,在节约电能和循环水消耗方面尤其显著。
Jiujiang Petrochemical polypropylene plant using domestic single-loop liquid-phase bulk polymerization process and DCS, ESD control technology, put into operation in June 1998, the original design capacity of 70kt / a in 2002 through the expansion of transformation, the actual production capacity reached 120kt / a or more. The device design energy consumption of 186kg standard oil / t polypropylene, the design of the working fluid consumption were 0.5t / t fresh water, energy consumption of 0.09kg standard oil / t; circulating water 150t / t, energy consumption of 15kg standard Oil / t; 1.0MPa steam 0.4t / t, energy consumption 30kg standard oil / t; desalinated water 0.2t / t, energy consumption 0.5kg standard oil / t; power consumption 467t / t, energy consumption 140kg standard oil / t. With the new polypropylene technology, the industrial application of new technologies, single-loop polypropylene pipe plant technology in the competitiveness of products is becoming increasingly disadvantaged. The energy consumption of this device is analyzed to establish the main factors that affect the energy consumption of the device, such as electric energy, circulating water and steam; and the energy saving is optimized from the aspects of process operation, equipment operation and technological transformation, etc. The energy consumption (90.46kg Oil / t) decreased by 15.84 kg / t and 7.99 kg / t respectively from 2011 and 2012, especially in terms of energy conservation and recycling water consumption.