Regeneration method for flue gas SCR de-nitration catalyst filtering element

Abstract

The present invention discloses a regeneration method for a flue gas SCR de-nitration catalyst filtering element. By means of the method, the filtering efficiency and the catalytic activity of an SCR de-nitration catalyst filtering element are recovered. The method comprises the steps of (1) purging the surface of the SCR de-nitration catalyst filtering element by means of the compressed gas, and then reversely purging the SCR de-nitration catalyst filtering element from the inside to the outside; (2) dipping the above SCR de-nitration catalyst filtering element in a dilute acid solution; (3) after the dipping process of the above SCR de-nitration catalyst filtering element in the dilute acid solution, dipping the SCR de-nitration catalyst filtering element in an activated solution so as to realize the replenishment of catalytic active ingredients on the surface of the SCR de-nitration catalyst filtering element; (4) after the fully dipping process of the SCR de-nitration catalyst filtering element in the activated solution, taking the SCR de-nitration catalyst filtering element out of the activated solution, roasting the SCR de-nitration catalyst filtering element and finally obtaining a regenerated SCR de-nitration catalyst filtering element. The above activated solution is used for the replenishment of catalytic active ingredients on the surface of the SCR de-nitration catalyst filtering element and is in the form of a saline solution containing an SCR de-nitration catalyst.

Description

technical field [0001] The invention relates to a method for regenerating a flue gas filter element, in particular to a method for regenerating a flue gas SCR denitrification catalytic filter element. Among them, the term "flue gas" generally refers to the flue gas generated in industrial kilns. Background technique [0002] Nitrogen oxides are one of the main components of air pollution, how to control the emission of nitrogen oxides has always been the focus of attention. The boiler flue gas produced in coal-fired boilers contains a large amount of nitrogen oxides. As a large coal-consuming country in my country, more than 70% of the nitrogen oxides come from coal combustion. In addition to containing nitrogen oxides, the boiler flue gas also contains a large amount of dust. In order to purify the flue gas containing nitrogen oxides and high dust, the applicant of the present invention discloses an industrial Furnace gas dust removal and denitrification integrated treatm...

AI Technical Summary

Problems solved by technology

After the special equipment for industrial furnace gas dedusting and denitrification has been used for a period of time, the filtration efficiency and catalytic activity of the catalytic filter element have decreased and cannot meet the requirements. In order to ensure the cleanliness of the purified flue gas, the filter element needs to be replaced regularly in actual operation, resulting in Filter elements cannot be recycled