Hydrogen peroxide tail gas purification aromatic hydrocarbon recovery and expansion power generation method

Abstract

The invention relates to a hydrogen peroxide tail gas purification aromatic hydrocarbon recovery and expansion power generation method. According to a hydrogen peroxide tail gas purification aromatic hydrocarbon recovery and expansion power generation device, a cold box is divided into a pre-cooling reheating section and a condensation section, and the process of indirect heat exchange reheating with high-pressure and high-temperature hydrogen peroxide tail gas is added before the hydrogen peroxide tail gas which is condensed and separated and purified enters an expansion machine. Because hydrogen peroxide tail gas purification is carried out at high pressure and low temperature, a small amount of heavy aromatics contained in the hydrogen peroxide tail gas after reheating becomes superheated gas. Therefore, the superheated state is still kept in the subsequent expansion process, heavy aromatics cannot be separated out after expansion, the problems of device complexity and crystal blockage in the traditional process are effectively solved, the purification effect can be enhanced, and more energy can be recycled for power generation.

Description

technical field [0001] The invention belongs to the technical field, and relates to a hydrogen peroxide tail gas purification recovery method for aromatics and expansion power generation. Background technique [0002] Domestic production of hydrogen peroxide (hydrogen peroxide) is mostly based on the di-ethylanthraquinone production process, and its production tail gas contains heavy aromatics. If it is recycled, it will not only save raw materials, but also protect the environment and reduce costs. At present, the hydrogen peroxide tail gas purification mostly adopts expansion refrigeration to recover heavy aromatics, and also expands power generation at the same time. Among them, the expansion refrigeration power generation process has complex devices, and when the expansion temperature is too low, it is easy to cause blockage of heavy aromatics crystallization and even damage the equipment. [0003] Traditional hydrogen peroxide expansion refrigeration purification and p...

AI Technical Summary

Problems solved by technology

Among them, the expansion refrigeration power generation process has complex devices, and when the expansion temperature is too low, it is easy to cause blockage of heavy aromatics crystallization and even damage equipment.

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