Fluidized bed hydrogenation system and hydrogenation method

Abstract

The invention discloses a fluidized bed hydrogenation system and hydrogenation method. The system comprises a fluidized bed hydrogenation reactor and a middle separation tank, wherein a raw material inlet and a circulating oil inlet are formed at the bottom of the fluidized bed hydrogenation reactor; an exit at the top of the fluidized bed hydrogenation reactor is connected with the middle separation tank; an exit pipeline at the bottom of the middle separation tank is divided into two parts; and one part is connected with the bottom of the fluidized bed hydrogenation reactor while the other part is combined with the top pipeline of the middle separation tank and delivered outside. According to the system and method disclosed by the invention, one part of liquid phase at the bottom of the middle separation tank is used as an entrance for the circulating oil to return to the fluidized bed reactor, a circulating cup in traditional boiling bed or suspended bed reactor is saved, effective space of the fluidized bed reactor is increased, the utilization rate of the catalyst is improved, the limited filling quantity of catalyst is increased, and the operation and maintenance of the device are facilitated.

Description

technical field [0001] The invention relates to the field of hydrogenation, and more specifically, to a fluidized bed hydrogenation system and a hydrogenation method. Background technique [0002] As crude oil becomes heavier and worse, the deep processing technology of heavy and residual oil has become the focus of petroleum resource utilization and development. At present, there are two main types of residual oil hydrogenation processes widely used in industry: fixed bed and ebullated bed. When dealing with low-quality (high-sulfur, high-carbon, high-metal) residual oil, fixed-bed hydrogenation will encounter catalyst bed coking caused by high exothermic reactions, increased bed pressure drop caused by solid accumulation, and catalyst poisoning And other issues. Ebullating bed hydrogenation avoids the problem of fixed bed hydrogenation, and can be well adapted to the processing of low-quality residual oil, while ensuring long-term stable operation of the device. [0003]...

AI Technical Summary

Problems solved by technology

[0006] Fluidized bed and suspended bed are both forms of fluidized bed technology. At present, fluidized bed hydrogenation is a relatively mature commercial technology. Suspension bed hydrogenation technology is in the stage of industrial development. These technologies are all adopted with circulation The internal circulation reactor of the cup is used to achieve boiling or suspension. This form leads to a complex structure of the reactor, a low utilization rate of the effective space of the reactor, a large investment in equipment, a low utilization rate of the catalyst, and inconvenient maintenance and repair.

Images