Continuous catalytic reforming method capable of achieving upflow regeneration of catalyst and adsorption and recovery of chlorine in coke-burning gas

Abstract

The invention relates to a continuous catalytic reforming method capable of achieving upflow regeneration of a catalyst and adsorption and recovery of chlorine in coke-burning gas. Upflow contact of the to-be-regenerated catalyst with the coke-burning gas is performed through a regenerator so as to achieve regeneration, so that the water content of the coke-burning gas in an upper coke burning section and a lower coke burning section is reduced to a very low level, and the water content of the coke-burning gas in the upper coke burning section is decreased gradually in the direction of catalyst movement. When the method is compared with the prior art, reduction of the specific surface area loss of the catalyst, prolonging of the service life of the catalyst and reduction of the loss of thechlorine component in the catalyst can be achieved in the regeneration process relative to a dry coke burning environment, so that the usage amount of a chlorinating agent needed to be supplemented in the oxychlorination process is reduced, and corrosion of the coke burning gas to devices and pipelines in a circulation loop is slowed down; and the chlorine in the coke burning gas is adsorbed by the to-be-regenerated catalyst, so that the chlorine injection amount in the oxychlorination section is reduced, investment is saved, and the environment is protected.

Description

technical field [0001] The invention relates to the technical field of catalytic reforming, in particular to a method for countercurrent regeneration of a continuous reforming catalyst and adsorption recovery of chlorine in coke gas. Background technique [0002] Catalytic reforming is one of the most important secondary processing processes in the oil refining and petrochemical industry. It is an important means of producing aromatics and high-octane clean gasoline, and it is also an important source of hydrogen for refining and chemical enterprises. Since the continuous reforming process realizes the continuous regeneration of the catalyst, the activity and selectivity of the catalyst in the reaction system remain relatively stable for a long time, and it can be operated at a lower reaction pressure and a higher reaction temperature, which is suitable for For the processing of inferior raw materials and the production of aromatics, compared with the semi-regenerative refor...

AI Technical Summary

Problems solved by technology

The disadvantages are: due to the chlorine and water content in the charred gas, the material requirements of the regenerator are increased, the dust in the charred gas is easy to block the sampler of the oxygen analyzer, and the high water content in the charred gas makes the specific surface area of ​​the catalyst decrease rapidly.

Moreover, the Chlorsorb chlorine adsorption technology process lacks flexibility. When there is a contradiction between chlorine supplementation and tail gas emission requirements, there is no adjustment method, which affects the long-term operation of the device.

Images