Heavy oil hydrogenation method and system

Abstract

The invention relates to a heavy oil hydrogenation method and a system. The system comprises a heavy oil inlet (1), a first hydrogenation protection reactor (3), a second hydrogenation protection reactor (4), hydrogenation reaction equipment, gas-liquid separation equipment and a recycle hydrogen compressor (10). According to the invention, the replacement period of the catalyst of the reactor is protected to be matched with the repair period of a refinery plant by switching the reaction equipment on line, and the operation period of the heavy oil hydrogenation device can be prolonged by 50-300%, so that the operation efficiency of the heavy oil hydrogenation device is increased, the economical efficiency is improved, the system stability is good, and the potential safety hazard is obviously reduced.

Description

technical field [0001] The present disclosure relates to a heavy oil hydrogenation method and a system thereof. Background technique [0002] With the heavy and inferior crude oil, increasingly stringent environmental protection requirements, increasing market demand for light oil products, and increasing requirements for clean petroleum products, more and more refineries use heavy oil in the selection of crude oil processing routes. The heavy oil processing scheme combined with hydrogenation and catalytic cracking, and the heavy oil hydrogenation unit has become the core device in these refineries. [0003] In the heavy oil hydrogenation technology, the fixed bed process is simple, mature and easy to operate, and is the most widely used process. In the fixed bed heavy oil hydrogenation process, the polluting metals in the heavy oil are most easily removed. These heavy metals deposit on the catalyst, which will cause the hydrogenation catalyst to deactivate rapidly, causing...

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Problems solved by technology

In actual production, the high temperature and high pressure in the system will lead to serious safety hazards if the reactor is switched online, the catalyst is replaced, and the operations such as vulcanization and temperature rise are carried out without stopping the device. Therefore, it is still unavoidable to stop the operation.

[0007] The existing technology has been improved in terms of technology and equipment. Although the operating cycle of the device can be extended to a certain extent, there are problems such as complex operation, poor system stability, increased equipment investment, and potential safety hazards.

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