mn‑ce/activated coke catalyst water washing‑drying combined regeneration method

Abstract

The invention provides a washing-drying combined regeneration method for a Mn-Ce / active coke catalyst. According to the method, the washing and drying process of the Mn-Ce / active coke catalyst is finished in a washing-drying combined regeneration device, and finally the regenerated Mn-Ce / active coke catalyst is obtained. The specific process includes the following steps that 1, at the washing stage, the inactivated Mn-Ce / active coke catalyst is placed in the washing-drying combined regeneration device, the surface of the Mn-Ce / active coke catalyst is cleaned with water, desulfurized and denitrified clean smoke is introduced into the washing-drying combined regeneration device, and waste water is drained after cleaning is finished; 2, at the drying stage, the desulfurized and denitrified clean smoke continues to be introduced into the washing-drying combined regeneration device in which the waste water is drained so as to dry the Mn-Ce / active coke catalyst. The method has the advantages of being simple in process, convenient to operate, capable of saving the occupied area and the like, the desulfurization efficiency of the regenerated catalyst is more than 90%, the denitrification efficiency can be about 60%, and wide application prospects are achieved.

Description

technical field [0001] The invention belongs to the field of environmental protection and catalysis, and in particular relates to a water washing-drying combined regeneration method of Mn-Ce / activated coke catalyst. Background technique [0002] Mn-Ce / activated coke catalysts are mainly used in moving bed reactors, and have good simultaneous desulfurization and denitrification effects at low temperatures (such as 120°C). The desulfurization efficiency can reach more than 90%, and the denitrification efficiency is about 80%. However, the Mn-Ce / activated coke catalyst will suffer from the adsorption of SO 2 And some ammonium sulfate is deposited on the surface, and the removal efficiency decreases, which eventually leads to the deactivation of the catalyst, which causes certain troubles and troubles to the production process. If the deactivated Mn-Ce / activated coke catalyst can be regenerated so that the catalyst can be recycled, it is a resource recycling technology in line ...

AI Technical Summary

Problems solved by technology

[0003] The original water-washed regenerated activated coke is to wash and dry the activated coke and then use it for desulfurization and denitrification reactions. However, in actual operation, the two processes of water-washed regeneration and activated coke drying are often carried out separately, which takes a long time and is not fully washed. Active coke regeneration efficiency

The water washing regeneration technology currently in use is still immature, and the following problems still need to be solved: (1) Water washing and drying are carried out separately, which occupies a large area; (2) Water washing is not sufficient, and the regeneration effect of active coke is not good; (3) Water washing The waste liquid that produces after is difficult to handle, has hindered the development of washing process; (4) can't popularize and apply on a large scale in industry

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