Abstract:

Sinopec Dalian Research Institute of Petroleum and Petrochemicals developed the "low temperature diesel absorption" VOCs treatment device for an aromatics and styrene tank farm. However, the waste gas volume sucked into the liquid ring compressor is always unstable. In this paper, a new automatic bleed gas volume control scheme of liquid ring compressor was adopted, the optimal control parameters were obtained by designing the bleed air control scheme for the compressor motor frequency and the opening of the return valve of the liquid ring compressor according to the pressure on the pipeline connected to the tank area. The results show that this technology can meet the requirements of energy saving and consumption reduction while ensuring that the exhaust gas is discharged up to the standard, and take into account the long?term stable operation of the equipment.

Key words: Tank farm, VOCs treatment, Liquid ring compressor, Bleed gas control scheme

摘要：

中国石化大连石油化工研究院开发的“低温柴油吸收”VOCs治理技术在某炼厂芳烃及苯乙烯罐区的应用中，存在液环压缩机吸入罐区废气的气量稳定性不足的问题。针对这一问题，采用一种新型液环压缩机自动引气控制方案，通过测量与罐区联通管道上的压力值，并根据压力值设计压缩机电机频率及液环压缩机回流阀开度的引气控制方案，最终得出最优的控制参数。结果表明，此方法可以在确保废气达标排放的同时满足节能降耗的要求，并兼顾设备的长周期平稳运行。

关键词: 罐区, VOCs治理, 液环压缩机, 引气控制方案