精对苯二甲酸装置能耗计算及分析

Energy consumption calculation and analysis of purified terephthalic acid plant

根据GB31533—2015《精对苯二甲酸单位产品能源消耗限额》的规定,确定了精对苯二甲酸(PTA)装置界区的划分及用能分布,比较了不同规模PTA装置的能耗及技术先进性,同时指出,项目的能耗分析还应对比同行业或同类技术的能耗。以1 000 kt/a PTA装置"四合一"工艺空压机组为例,进行能耗和做功能力计算及分析,空压机组对装置外输出电量约为8 220 k W,折合单位产品节能65.8 k W,节能效果显著;单位产品能耗计算同时还应考虑物料消耗。

The battery limit and distribution of energy consumers of purified terephthalic acid plant （PTA） were specified ac- cording to GB31553 -2015 Norm of Energy Consumption of Purified Terephthalic Acid per Unit Product. The energy consumption and technological advancement of various production-scale PTA plants were compared. In addition, it pointed out that the energy consumption of a project should be analyzed against the energy consumptions of the same industries and technologies. The energy consumption and power capability was calculated and analyzed based upon a four-in-one process air compressor unit of a 1 000 kt/a PTA plant as an example. The external output electricity of air compressor unit was about 8 220 kW, converting the energy saving per unit product as 65.8 kW, which indicated the profound energy saving effect. And the calculation of unit product ener- gy consumption should take into consideration the feedstock consumption.