Suspended bed hydrogenation discharge process

Abstract

The invention provides a suspended bed hydrogenation discharge process, which comprises a suspended bed hydrogenation reactor, a discharge pipeline, a cooling separation system, a torch system and a raw oil recycling system. According to the process, when the temperature of the suspended bed hydrogenation reactor instantaneously rises and exceeds the normal reaction temperature, the material inletvalve on the material inlet pipeline is closed, and the discharge valve group is opened; the liquid-solid phase material in the suspended bed hydrogenation reactor is discharged into the cooling separation system through the bottom portion; and the cooled and separated gas phase material is discharged to the torch system, and the liquid-solid phase material is discharged to the raw material oil recycling system so as to achieve the emergency discharge of the suspended bed hydrogenation reactor. According to the present invention, the liquid phase and the catalyst solid in the suspended bed hydrogenation reactor are rapidly discharged during the emergency discharge to stop the occurrence of the reaction, such that the thermal runaway of the suspended bed hydrogenation reactor can be avoided, the temperature in the reactor can be effectively controlled, the safety can be improved, the pressure in the suspended bed hydrogenation reactor can be stabilized at the high pressure, the equipment fatigue caused by the frequent pressure increase and pressure reduce can be avoided, and the energy consumption and the cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a suspension bed hydrogenation bleeding process. Background technique [0002] As crude oil becomes heavier and thicker, the demand for light oil products continues to increase, and domestic environmental protection mechanisms become increasingly stringent, heavy oil processing has become a major problem faced by modern refineries. At present, heavy oil processing mainly includes delayed coking, visbreaking, heavy oil catalytic cracking and heavy oil hydrogenation, but all of them have certain limitations and problems, and cannot meet the needs of improving the utilization rate of petroleum resources. Suspension bed hydrogenation process can not only process the whole distillate low-quality residual oil, but also basically has no limit on the impurity content of the processed raw materials, and can process various low-quality heavy residues such as high...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is that the venting process of the suspension bed hydrogenation reaction in the prior art has the problems of difficult control of the reactor temperature, low safety factor and high cost, and then provides an easy-to-control reactor temperature, safe Reliable and low-cost suspended bed hydrogenation venting process

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