Method and equipment for overcoming temperature reaction hysteresis of silicon carbide cyclic carrier

Abstract

Embodiments of the present invention provide a method and equipment for overcoming temperature reaction hysteresis of a silicon carbide ring carrier. Wherein, the method includes: using temperature as the main circuit and pressure as the secondary circuit, heating the silicon carbide annular carrier in the sugar-coating pan within a preset time period until it reaches the temperature for spraying the active material liquid; The temperature of the silicon carbide ring-shaped carrier in the sugar-coating pan is corrected, the temperature of the silicon carbide ring-shaped carrier in the sugar-coating pan during the spraying of the active material liquid, and the constant temperature of the silicon carbide ring-shaped carrier in the sugar-coating pan after the spraying is completed , within the preset error range. The method and equipment for overcoming the temperature reaction hysteresis of the silicon carbide annular carrier provided by the embodiments of the present invention can effectively avoid the temperature hysteresis of the silicon carbide annular carrier in the sugar coating pan.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of industrial control, in particular to a method and equipment for overcoming the temperature reaction hysteresis of a silicon carbide ring carrier. Background technique [0002] Currently, the mainstream BC-118 catalyst is a new generation catalyst for the production of maleic anhydride (referred to as maleic anhydride) by the oxidation of benzene. The catalyst has the advantages of high activity, good selectivity, high yield, large load, and good quality of maleic anhydride produced. In the production process of maleic anhydride, it is found that when the temperature is raised and sprayed, the existing control method cannot be used to control the temperature. This is mainly because the catalyst is attached to the silicon carbide annular carrier of Ф6×1.5×5mm, and the silicon carbide annular carrier is stirred and heated in the sugar coating pan, which is heated by natural gas com...

AI Technical Summary

Problems solved by technology

Since the control temperature accuracy of the silicon carbide annular carrier in the sugar-coating pan heated by natural gas is relatively high, but there is a relatively large lag from the action of the control regulating valve to the change of the carrier temperature. Trying to use traditional control methods cannot meet the control requirements.

Therefore, finding a method that can overcome the temperature reaction hysteresis of the silicon carbide cyclic carrier and effectively avoid the control hysteresis of the temperature of the silicon carbide cyclic carrier in the sugar coating pan has become a technical problem that needs to be solved urgently in the industry.

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