Method for purifying circulating gas regenerated continuously by reforming catalyst

Abstract

A purification method for continuously regenerated circulating gas of a reforming catalyst. The burnt regenerated gas and the dechlorinated gas come out of the regenerator, and the chlorine is removed first, and then cooled, dried, filtered, boosted, and heated in sequence. , and finally cycle back to the charred section of the regenerator. The method reduces the chlorine content of the regenerated circulating gas to below 1ppm at a high temperature position, thereby overcoming the chlorine corrosion problem of the device in the prior art.

Description

technical field [0001] The invention relates to a method for continuous catalytic reforming of naphtha, more specifically, a method for purifying circulating gas when the reforming catalyst is regenerated. Background technique [0002] Catalytic reforming unit is an important part of the oil refining and petrochemical industry. With the increase in the demand for gasoline for vehicles, the improvement of environmental protection requirements, the wide application of basic chemical raw materials such as light aromatics (benzene, toluene, xylene), and the refinery The increase in the demand for hydrogen for various newly-built hydrogenation units has led to greater development of catalytic reforming units at home and abroad. As of 2000, my country had 55 sets of catalytic reforming units with a total processing capacity of 16.47 million tons per year, including 14 sets of continuous reforming devices with a capacity of 8.89 million tons per year, acco...

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Problems solved by technology

If this method is improperly operated, it will cause equipment corrosion, and even bring the alkali washing liquid into the drying tank, making the desiccant invalid, and the regeneration system is forced to shut down; and the gas treated by the alkali washing process needs to be washed with water, and the washed water The water content of the gas cannot be well controlled, resulting in an increase in the load of the drying system; there are also problems such as the pollution discharge of the alkali washing liquid, the freezing and cracking of the alkali washing tower and corresponding pipelines in winter, which affect the long-term stable operation of the regeneration system

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