High-carbon spent catalyst continuous regeneration method

Abstract

The present invention discloses a high-carbon spent catalyst continuous regeneration method. The main technical program is as follows: a regenerator comprises, from top to bottom, a buffer zone, a scorching zone and a drying zone, the scorching zone comprises an upper scorching section and a lower scorching section, a regeneration gas from the regenerator is led out from the upper part of the regenerator, and divided into three ways after heat change, cooling, drying and compression, a first way is supplemented with air, then enters the upper scorching section of the regenerator after increasing of temperature by heating, a second way is supplemented with the air, then enters the lower scorching section of the regenerator after increasing of temperature by heating, a third way as a drying gas enters the drying zone, the regeneration gas and a spent catalyst are in crossflow contact in the scorching zone, the catalyst scorched in the scorching zone downward enters the drying zone to complete the entire scorching regeneration process, the catalyst after the regeneration is recycled, and the regeneration gas completing the scorching in the scorching zone and the drying gas from the drying zone of the regenerator are led out from the upper part of the regenerator for recycling. The method can effectively control scorching bed layer temperature of the regenerator and extends the service life of the catalyst.

Description

technical field [0001] The invention belongs to the field of catalyst regeneration in coal chemical industry or natural gas chemical industry, and in particular relates to a method for continuous regeneration of a high-carbon standby catalyst in methanol conversion to hydrocarbon production reaction using moving bed technology. Background technique [0002] At present, in the field of coal chemical industry or natural gas chemical industry, technologies such as methanol to propylene (MTP), methanol to gasoline (MTG) and methanol to aromatics (MTA) are research hotspots at home and abroad. On the one hand, these technologies can make efficient chemical utilization of coal resources, and on the other hand, they can solve the situation of high dependence on imports of related products caused by the shortage of oil resources. Therefore, the partial substitution of petroleum supply by synthesizing hydrocarbons from methanol has received great attention. [0003] In the conversio...

AI Technical Summary

Problems solved by technology

Such as local overheating of the catalyst bed, excessive bed pressure drop, intolerance to dust clogging, difficult switching operation and high cost of catalyst recovery, etc.

Although the fluidized bed is more conducive to the reaction in terms of transfer, the inevitable catalyst wear and separation problems have always been troublesome engineering problems

In this method, one section of the regenerator is burnt, there is no drying zone, there is no effective means to control the temperature of the burnt bed of the regenerator, and there is no catalyst roasting and drying process

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