Device and method for burning catalyst of fixed bed reactor

Abstract

The invention provides a device and method for burning a catalyst of a fixed bed reactor. The device comprises the fixed bed reactor, a heating furnace, a gas compressor, a heat exchanger, a cooler, a pipeline and a control valve unit, wherein the pipeline is connected with the control valve unit to form a multipath temperature control system. The method mainly comprises the following steps: hightemperature burning medium passing through the heating furnace enters from the top part of the fixed bed reactor, high temperature burning smoke coming out from a first section of a catalyst bed layer is mixed with low-temperature burning medium from an intersectional distributor before the high temperature burning smoke enters a second section of the catalyst bed layer, and the process is repeated until the high temperature burning smoke coming out from the last section of the catalyst bed layer comes out from the reactor. The device and method provided by the invention have the main advantages of being beneficial to the utilization of heats produced by the burning, reducing the energy consumption of the heating furnace, improving the burning strength, shortening the burning time and being convenient for thee temperature control of the catalyst bed layer.

Description

technical field [0001] The invention relates to a catalyst coking device and method for a fixed-bed reactor, which is particularly suitable for coking of catalysts including olefins in catalytic cracking and delayed coking dry gas and olefins in liquefied gas for gasoline and other fixed-bed catalysts. Background technique [0002] The fixed-bed reactors that use catalytic cracking and delayed coking dry gas as raw materials are mostly vertical tank structures with a single-stage catalyst bed. The top of the reactor is equipped with feed pipes and distributors; the internal space of the reactor is filled with the required catalyst to form a catalyst bed. With the development of catalyst and process, equipment and control technology, the catalyst bed in the fixed bed reactor has recently changed from one-stage bed to multi-stage bed structure. For example, the patent application for "Aromatization Reactor" (Application No.: 201110059525.9) previously proposed by the applican...

AI Technical Summary

Problems solved by technology

These two methods have a common disadvantage when applied to a fixed-bed reactor with a multi-stage catalyst bed structure: that is, there is only one entrance for the charred medium to enter the reactor, whether it enters from the top of the reactor or from the bottom, it is layer by layer forward. Propulsion, slower speed, longer time, higher energy consumption

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