System and method for dust removal in hydrogen environment

Abstract

The invention relates to the field of oil refining production, and discloses a system for discharging dust in the hydrogen-containing medium state environment. The system comprises a dust collector (1). The system further comprises a nitrogen feeding device (2), a dust buffer tank (3) and a controller. The dust buffer tank (3) is connected with the dust collector (1) and the nitrogen feeding device (2). The controller is used for controlling the nitrogen feeding device (2) to supply nitrogen to the dust buffer tank (3), controlling the dust buffer tank (3) to exhaust gas as so to replace the gas in the dust buffer tank (3) and further controlling the dust collector (1) to discharge dust to the dust buffer tank (3). By means of the system for discharging the dust in the hydrogen-containing medium state environment, the dust can be discharged without stopping the dust collector, field operation risks are lowered, elutriation gas flow fluctuation is reduced, stable control over the pressure of a catalyst regeneration system is enhanced, and labor intensity is relieved.

Description

technical field [0001] The invention relates to oil refining production, in particular to a system for unloading dust in a hydrogen environment and a method for unloading dust in a hydrogen environment. Background technique [0002] The continuous reforming unit is the main unit of a modern refinery, mainly used to produce high-grade clean gasoline and chemical raw materials. As the leading unit for modern aromatics production, the continuous reforming unit has been built in all major domestic refineries; the continuous reforming process passes the catalyst Uninterrupted lifting, circulation, burning, reduction and regeneration, so that the activity of the reforming catalyst can be kept at a good level, and the purpose of increasing the reaction depth can be achieved. During the recycling and regeneration process of the reforming catalyst, a small amount of dust and broken particles are produced, which need to be collected continuously and extracted regularly. The catalyst ...

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Problems solved by technology

[0004] Since the dust collector has high requirements on filtration accuracy, the dust collector is equipped with a blowback system, a loosening system, etc., and there are many inlet and outlet pipelines, the switching process is complicated and the workload is huge; in addition, there are many inlet and outlet valves. There is often internal leakage of the valve, incomplete replacement of hydrogen, and high operating temperature, resulting in increased operating risks. When the dust discharge is severe, hydrogen and catalyst dust may be combusted

Furthermore, all operations in the original design required manual switching of valves, which increased operational difficulty and operational risks, and reduced work efficiency.

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