A Process for Preventing Catalyst Leakage in Continuous Reforming Unit

Abstract

The invention relates to a technology for preventing catalyst leakage of a continuous reforming apparatus. The technology comprises the following steps: arranging a catalyst filter at the outlet of each of reforming reactors, arranging pressure gauges in front of and behind each of the catalyst filters, calculating the pressure difference, determining the difference between the pressure in front of the catalyst filter at the outlet of each of the reforming reactors and the pressure behind the catalyst filter in order to directly judge that whether the catalyst leakage of each of the reactors occurs or not, and opening the catalyst filter and discharging the above catalyst once the catalyst is leaked. The technology can effectively solve the problem of the entrance of a catalyst-containing oil gas to next apparatuses due to the rupture of members in the reforming reactors, allows the oil gas to go through the filter and then enter heating furnaces and next reactors, and allows the catalyst to be discharged from the bottoms of the filters if the catalyst is leaked. The technology allows whether the filter leaks or not to be determined by determining the difference between the pressure in front the catalyst filters and the pressure behind the catalyst filters, and allows corresponding measures to be timely adopted, so the long term running of the apparatus can be effectively maintained.

Description

technical field [0001] The invention relates to a process for preventing catalyst leakage of a continuous reforming unit. Background technique [0002] Catalytic reforming is an important process of petroleum secondary processing, and it is a catalytic reaction process aimed at producing high-octane gasoline components and aromatics. Uninterrupted catalyst delivery is the key to the continuous reforming reaction. The catalyst enters the reactor from the upper hopper, the lower hopper to the catalyst lifter in turn by its own gravity, and then lifts to the upper hopper of the next reactor by lifting gas, and then comes out of the reactor. After that, it is lifted to the regenerator, and enters the reactor through the processes of primary coking, secondary coking, oxychlorination, roasting, reduction and other processes for catalyst circulation to achieve the purpose of regeneration. The oil gas enters the reforming reactor after being heated by the heating furnace, and conta...

AI Technical Summary

Problems solved by technology

[0003] Because the internal parts of the reforming reactor are very complicated and there are many connecting parts, the leakage points formed on the top of the reactor alone reach more than 100 points in six categories, and under the influence of temperature and pressure fluctuations under high temperature conditions, the internal parts and connecting parts are extremely Easily deformed, cracked, and leakage of agent occurs, causing great hidden dangers to the long-term operation of the device

If the central tube of the reforming reactor is damaged or deformed, the catalyst leaks into the manifold of the four-in-one furnace, and then enters the fan-shaped tube of the next reactor, causing the pressure drop of the reactor to rise. In severe cases, the catalyst material leg is blocked. The reactor and the catalyst enter the plate heat exchanger with the oil and gas, the plate of the heat exchanger is blocked, and the serious consequences of the forced shutdown of the reformer

[0004] The oil and gas in the reactor of the existing reforming unit flow out from the bottom of the central tube. When catalyst leakage occurs, it will enter the manifold of the four-in-one furnace, and then enter the fan-shaped tube of the next-stage reactor, causing the shutdown of the reforming unit.

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