SINOALKY硫酸法烷基化装置用能分析及优化

介绍了0.20 Mt/a SINOALKY硫酸法烷基化装置的能耗现状，分析了1.0 MPa蒸汽、循环水和除盐水耗量高的原因，采取了分馏塔降温降压操作、停用反应流出物酸碱水洗流程、降低制冷压缩机防喘振流量、优化节水等4方面的措施，共减少1.0 MPa蒸汽耗量9 t/h、3.5 MPa蒸汽耗量3 t/h、除盐水耗量7 t/h、用电量102.95 kW?h、用水340 t/h，综合测算，装置能耗已由开工初期的6 064.762 MJ/t降低至2019年12月的4 598 MJ/t以下。结合装置实际情况，提出了回收利用工艺介质低温热、回收利用凝结水低温热、增设机泵变频等建议，为装置下一步节能优化指明了方向。

ENERGY CONSUMPTION ANALYSIS AND OPTIMIZATION OF SINOALKY SULFURIC ACID ALKYLATION UNIT

The present situation of energy consumption of 0.20 Mt/a alkylation unit was introduced and the causes of high consumption of 1.0 MPa steam, circulating water and demineralized water were analyzed. Four measures were taken, such as cooling and decompressing operation in fractionators, stopping the acid, alkali and water washing process of reaction products, reduce anti-surge flow of refrigerating compressor, optimizing water service, resulting in reduction of 1.0 MPa steam consumption by 9 t/h, 3.5 MPa steam by 3 t/h, demineralized water by 7 t/h, electricity by 102.95 kW.h, and circulating wate by 340 t/h. According to the comprehensive calculation, comparing with the initial stage of operation, the energy consumption of unit reduced from 6 064.762 MJ/t to below 4 598 MJ/t. According to the actual situation of the unit, the measures, such as reusing of low temperature medium heat of process, and low temperature heat of condensate water, adding frequency conversion of machine pump, were put forward as the direction for further energy-saving of the unit.