Circulating spouted bed sintering flue gas multi-pollutant integrated removal system

Abstract

The invention discloses a circulating spouted bed sintering flue gas multi-pollutant integrated removal system, and belongs to the technical field of industrial flue gas treatment. In the system, a tubular heat exchanger is connected with a bottom air inlet of a hearth through an air pipe; a hopper and a natural gas burner are arranged at the side part of the hearth, and a solid bed material with the particle size of 70-150 microns is filled in the hearth; an upper end outlet of the hearth is connected with an inlet of the cyclone separator, a plurality of ammonia spraying nozzles are distributed at the inlet of the cyclone separator, and a lower outlet of the cyclone separator is connected with the bottom of the hearth through a material returning pipe; an upper end outlet of the cyclone separator is connected with the tubular heat exchanger through a flue gas pipe; the tubular heat exchanger is connected with the bag-type dust collector; and the induced draft fan is connected with an outlet of the bag-type dust collector. According to the invention, various pollutants such as dioxin, carbon monoxide, sulfur oxide, nitrogen oxide and solid particle dust in the sintering flue gas can be integrally removed, the removal efficiency is high, the carbon emission and pollution are obviously reduced, and the whole system is compact and simple in structure.

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