Treatment method and device for concentrating, drying and detoxifying dead catalyst entrained in isobutylene during preparation of isobutylene by isobutane dehydrogenation

Abstract

The invention relates to a treatment method and device for concentrating, drying and detoxifying a dead catalyst entrained in isobutylene during preparation of the isobutylene by isobutane dehydrogenation. The method comprises the following steps: (a) washing a high-temperature isobutene gas generated by isobutane cracking reaction by using circulating cooling water, so as to obtain a washing wastewater containing the dead catalyst; (b) concentrating dead catalyst particles in the obtained washing wastewater by adopting micro cyclone separation, so as to obtain dead catalyst concentrate; (c) carrying out pressure filtration on the obtained dead catalyst concentrate, so as to further remove free water in the concentrate, thus obtaining a dead catalyst filter cake; (d) baking the obtained dead catalyst filter cake by using a flue gas discharged by a regenerator during preparation of the isobutylene by isobutane dehydrogenation to obtain a wet catalyst filter cake with low moisture content, and simultaneously raising the temperature of the wet catalyst filter cake by using the heat of the regenerated gas; and (e) introducing a CO gas to the regenerator, and carrying out redox reaction to generate a 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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