Suspension bed residual oil hydrogenation-catalytic cracking combined technological process

Abstract

The invention discloses a combination process of hydrogenation-catalytic cracking used for suspension bed residual oil. The method comprises the steps as follows: residual oil and catalytic cracking decanted oil enter a suspension bed hydrogenation reaction device and carry out hydrogenation reaction with the presence of hydrogen and a catalyst; the vacuum distillate oil gained during the hydrogenation reaction enters a catalytic cracking device, the vacuum residual oil is circulated back to the suspension bed hydrogenation device, and the catalytic cracking decanted oil and heavy circular oil can wholly or partly enter the suspension bed hydrogenation device which adopts a relatively moderate operation condition. The method organically combines the suspension bed hydrogenation device with the catalytic cracking device, and therefore not only ensures the stable running of the suspension bed hydrogenation device, but also improves the impurity removal capability of the suspension bed hydrogenation device, improves the raw material quality of the catalytic cracking device, and increases the yield of the light oil products.

Description

technical field [0001] The invention relates to a processing method for lightening residue oil, in particular to a combined processing method for hydrogenation-catalytic cracking of residue oil in a suspended bed. Background technique [0002] With the heavy and inferior quality of crude oil worldwide, and the increasingly stringent environmental protection regulations, residual oil hydrogenation technology has become an important processing method for residual oil. On the one hand, hydrogenation of residual oil can directly obtain some light products, on the other hand, it can provide suitable raw materials for subsequent processes such as catalytic cracking and coking, etc. Through hydrogenation, the content of impurities such as sulfur, nitrogen, and metals in inferior residual oil And the carbon residue value is significantly reduced, so as to obtain high-quality feed for subsequent processing devices. [0003] Residue hydrogenation technology mainly includes fixed bed ...

AI Technical Summary

Problems solved by technology

Residue suspension bed hydrogenation technology uses solid powder catalyst or homogeneous catalyst, but due to high reaction temperature and high conversion rate (generally greater than 90%), the reaction process is prone to coking, and it is difficult to operate stably for a long period of time. At the same time, the hydrogenation function is relatively weak , poor product quality

At present, there is no commercial device for the suspension bed hydrogenation technology, and the main reason limiting its large-scale industrial application is that it cannot operate stably