A kind of sulfolane aromatics extractive distillation unit with semi-lean liquid recycle stream

Abstract

The invention discloses a sulfolane aromatic hydrocarbon extraction distillation device with half-lean solution cycle logistics. The device comprises a non-aromatic hydrocarbon overhead gas / extractive distillation raw material heat exchanger, a half-lean solution / extractive distillation heat exchanger, an extractive distillation tower, an extractive distillation tower middle reboiler, an extractive distillation tower reboiler, a non-aromatic hydrocarbon rectification column, a non-aromatic hydrocarbon distillation column overhead air cooler, a non-aromatic hydrocarbon distillation column overhead water cooler, a non-aromatic hydrocarbon distillation column overhead return tank, a non-aromatic hydrocarbon distillation column bottom reboiler, a flash tank, a solvent recovery tower, a solvent recovery tower overhead air cooler, a solvent recovery tower overhead water cooler, a solvent recovery tower overhead return tank, and the like. According to the device disclosed by the invention, a half-lean solution which is not completely purified is used for cycle extraction distillation, energy consumption in the sulfolane extraction distillation process is reduced, circulation quantity of a lean solvent is obviously reduced, and the treatment amount of the solvent recovery tower is reduced, so that stripping water amount and reboiling load of the solvent recovery tower can be reduced, and industrial production, energy conservation and production-expanding reform are facilitated.

Description

technical field [0001] The invention relates to a sulfolane aromatic hydrocarbon extraction and distillation device. Background technique [0002] With the development of science and technology and social economy, the chemical industry has gradually developed into an industry involving many fields and varieties. There are many products in the chemical industry, and the production processes vary greatly, but they all have a common feature: raw materials undergo a series of chemical and physical changes to obtain products. In this process, energy is the driving force for chemical reactions and separations. However, with the extraction, transmission, conversion, utilization and consumption of energy, the material balance and energy balance on the earth are also changing indirectly or directly, and the ecosystem is affected in various ways. At the same time, this kind of energy extraction and consumption has also become environmental pollution. main source of . The petrochemi...

AI Technical Summary

Problems solved by technology

The integration of product separation requirements and comprehensive energy optimization is not considered, resulting in a large amount of poor solvent circulation, a large processing capacity of the solvent recovery tower, a high operating load, and a large consumption of stripping water

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