Treatment method and device for concentrating, drying and detoxifying spent catalyst carried by isobutene in isobutane dehydrogenation to isobutene

Abstract

The present invention relates to a treating method and device for concentrating, drying and regenerating a waste catalyst entrained in isobutylene in the preparation of isobutylene by dehydrogenation of isobutane. The method comprises the following steps: (a) washing a high-temperature isobutylene gas produced from the cleavage reaction of isobutane with a circulating cooling water to obtain a washing wastewater containing the waste catalyst; (b) concentrating the waste catalyst particles in the obtained washing wastewater by micro-hydrocyclone separation to obtain a waste catalyst concentrated liquid; (c) pressure-filtering the obtained waste catalyst concentrated liquid to further remove free water in the concentrated liquid so as to obtain a waste catalyst filter cake; (d) drying the obtained waste catalyst filter cake with a discharged flue gas from a regenerator in the process of the preparation of isobutylene by the dehydrogenation of isobutane to obtain a wet catalyst filter cake having a low moisture content; and at the same time increasing the temperature of the wet catalyst filter cake using the heat of the regeneration gas; and (e) introducing a CO gas into the regenerator to perform a redox reaction so as to regenerate the catalyst.

Description

technical field [0001] The invention belongs to the field of chemical solid waste prevention and control, and relates to a method for concentrating, drying and detoxifying the waste catalyst carried by isobutene in the production of isobutene from isobutane dehydrogenation. Specifically, the invention relates to washing the crude isobutene product with a washing tower , carry out micro-swirl concentration and pressure filtration on the obtained washing wastewater, and at the same time, use the regeneration gas temperature to dry the obtained catalyst filter cake to obtain a wet catalyst filter cake with low water content, and finally detoxify the spent catalyst in the regenerator, A method to obtain a catalyst with higher activity. The invention also relates to a device for concentrating, drying and detoxifying the spent catalyst entrained in isobutene in isobutane dehydrogenation to isobutene. Background technique [0002] With the increase of crude oil processing capacity...

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a novel treatment method and device for concentrating, drying and detoxifying the spent catalyst entrained in isobutene in the production of isobutene from isobutane dehydrogenation, which solves the problems of large equipment occupation area, poor separation effect and washing The solvent in the tower is easy to foam, and the recovered spent catalyst has low activity, which effectively prolongs the continuous operation period of the device, optimizes the overall working condition of the device, realizes catalyst detoxification and recycling, reduces energy consumption, and realizes low-energy production

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