Online utilization method of fluidized bed externally-discharged hydrogenation demetallization catalyst

Abstract

The present invention discloses an online utilization method of a fluidized bed externally-discharged hydrogenation demetallization catalyst. According to the present invention, a fluidized bed reactor is connected with a catalyst discharge tank, the downstream of the catalyst discharge tank is provided with a catalyst buffer tank, and the catalyst buffer tank is communicated with a hydrogenation pre-treatment device; and the fluidized bed externally-discharged catalyst firstly enters the catalyst discharge tank filled with a distillate oil and then enters the catalyst buffer tank, the catalyst in the buffer tank is discharged into the hydrogenation pre-treatment device, the coal tar and hydrogen gas mixed material enters the hydrogenation pre-treatment device in a lower feeding manner to carry out a hydrogenation reaction, the stream is discharged from the upper portion of the pre-treatment reactor after the reaction, and the catalyst in the hydrogenation pre-treatment device is periodically discharged out from the lower portion of the reactor. According to the present invention, the online utilization of the fluidized bed externally-discharged catalyst and the pre-treatment of the coal tar are combined so as to increase the economy of the device and further provide the new method for the effective utilization of the fluidized bed externally-discharged catalyst.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and relates to a method for online utilization of a fluidized bed hydrogenation exhaust catalyst. Specifically, the present invention relates to the activity of the hydrodemetallization catalyst for hydrogenation of heavy oil in an ebullating bed and a method for reusing heat energy. Background technique [0002] The ebullating bed residual oil hydrogenation technology uses an online discharge device, which has a wide range of raw material adaptability, and can process low-quality residual oil with high content of asphaltene, residual carbon and metals. The ebullated bed hydrogenation reactor is a gas-liquid-solid three-phase reactor. The catalyst in the reactor is boiling due to the lifting of the liquid and the agitation of the gas. The three-phase flow in the reactor is in a back-mixing state. In order to keep the product properties stable, It is necessary to add fresh catalyst regularly ...

AI Technical Summary

Problems solved by technology

The above-mentioned patents only introduced how to separate the oil-water-catalyst through hydrothermal desorption and cyclone separation, but did not mention the effective utilization of exhaust catalyst activity and heat energy

Images