Ultra-low emission purification treatment system of converter primary dry method dedusting emission smoke

Abstract

The invention relates to an ultra-low emission purification treatment system of converter primary dry method dedusting emission smoke. The system comprises an evaporation cooler, an electrostatic dustcollector, a first fan, a switching station, a gas cooler, a heat exchanger, a pulse cloth bag dust remover, a second fan, an emission chimney, a nitrogen heater and a pneumatic ash conveying sendingapparatus; the evaporation cooler, the electrostatic dust collector, the first fan, the switching station and the gas cooler are connected in sequence, a dust remover air inlet valve set, the heat exchanger, the second fan and a dust remover air outlet valve set are connected in sequence, the switching station, the pulse cloth bag dust remover and a jetting inlet of the emission chimney are connected in sequence, the pneumatic ash conveying sending apparatus is arranged below the pulse cloth bag dust remover, the nitrogen heater is connected with the pulse cloth bag dust remover and the pneumatic ash conveying sending apparatus, and an emission smoke pipeline is provided with a heat tracing heat preservation device and a first explosion venting valve. The system can achieve the smoke dustultra-low concentration emission at the emission stage, and the high temperature resisting and explosion prevention aims are achieved.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to an ultra-low emission purification treatment system for primary dry dedusting of a converter to release flue gas. Background technique [0002] The process flow of the existing converter primary dust removal dry purification and recovery system: the high-temperature flue gas (1400°C-1600°C) produced by the oxygen converter steelmaking process is cooled by the vaporization cooling flue, and the temperature drops to 800°C-1000°C, and the flue gas After being cooled by the evaporative cooler, the temperature drops to 300°C-400°C, and the flue gas is tempered while cooling. In addition, about 30%-40% of the coarse dust is intercepted when the flue gas passes through the evaporative cooler. After cooling and tempering, the flue gas enters the electrostatic precipitator and the amount of dust is reduced to 15mg / Nm 3 about. [0003] The main problem in the existing dry system i...

AI Technical Summary

Problems solved by technology

The layout of newly-built dry process equipment is basically relatively compact, so it is very difficult to carry out reconstruction before the dry process system switching station

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