关键词: 芳烃联合装置, 能耗, 加热炉, 精馏塔顶冷凝热, 低温热

Abstract:

The article analyzes the difference in the energy consumption and low temperature heat recovery based on the 1^# and 2^# aromatics complex in a certain company. The effect of design improvement on the 2^# aromatics complex is also discussed. Measures such as improving the thermal efficiency of heating furnace fuel, optimizing the operating conditions of rectification tower, and improving the low temperature heat utilization efficiency are very important to reduce the energy consumption of the unit. The operating cost of 2^# aromatics complex is significantly lower than that of 1^# aromatics complex. In particular, the unique steam compression system of 2^# aromatics complex converts the low-pressure steam produced by the unit into sub high-pressure steam, replacing some high-pressure steam users in the traditional design, making the heat utilization more reasonable. With the development of hot water refrigeration technology, the aromatics complex will make greater achievements in the future by using low temperature waste heat to produce hot water and then refrigeration.

Key words: aromatics complex, energy consumption, heating furnace, condensation heat at the top of rectification tower, low temperature heat