Sintering dust autocatalytic denitrification system

Abstract

The invention relates to a self-catalysis denitration system for sintering smoke, aiming at solving the problems that the existing denitration system is large in investment, high in running cost, complicated in disposal of a waste denitration catalyst, and the like. The self-catalysis denitration system is characterized by comprising a sintering machine; air boxes are arranged under a trolley of the sintering machine; outlets formed in the bottoms of the air boxes are communicated with a main flue; the tail of the sintering machine is provided with a single-roll crusher and a hot vibrating screen; a small-particle material outlet of the hot vibrating screen arranged at the tail of the sintering machine is connected with a fluidized bed denitrification reactor by means of a particle material bin. The self-catalysis denitration system is simple, a denitration catalyst does not need to be additionally purchased, and the self-catalysis denitration system is high in recovery rate of waste heat, good in controllability, small in land occupation and low in equipment investment and running cost.

Description

technical field [0001] The invention relates to a flue gas denitrification system in the field of environmental protection, in particular to an autocatalytic denitrification system for sintering dust. Background technique [0002] In recent years, my country's energy consumption has been increasing, and the resulting nitrogen oxide (NOx) emissions have grown rapidly. At present, it has become the world's largest NOx emitter, and iron and steel enterprises are the second largest after the thermal power industry. large source of emissions. During the "Twelfth Five-Year Plan" period, the thermal power industry has implemented denitrification treatment for its flue gas, while the denitrification of sintering flue gas has just started, and the denitrification of sintering flue gas has become an urgent environmental problem in my country. [0003] Activated carbon (coke) adsorption and selective catalytic reduction (SCR) are currently the sintering flue gas denitrification technol...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned technical problems, aiming at the problems of the existing SCR denitrification system of sintering flue gas such as complex process, high investment and operating costs, combined with the large amount of ore returned during the sintering production process, the high temperature of hot ore returned, and the sintered ore contains a large amount of The characteristics of iron-based polyoxides provide a sintering dust autocatalytic denitration system with simple process flow, no outsourcing denitrification catalyst, high heat recovery efficiency, good controllability, small footprint, low equipment investment, and low operating cost

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