Device and method for removing dust from converter smoke by dry method and recycling waste heat

Abstract

The invention discloses a device and a method for removing dust from converter smoke by a dry method and recycling waste heat and belongs to the technical field of comprehensive utilization of the converter smoke. The device comprises a converter, a vaporizing and cooling flue, a gravity settling chamber, a flue, a heat exchanger, an electrostatic dust remover, an axial flow fan and a smoke diffusing tower or a gas chamber, wherein the gravity settling chamber is connected with the converter through the vaporizing and cooling flue and is connected with an efficient heat pipe exchanger through the flue; the heat exchanger is connected with the electrostatic dust remover through the flue; the electrostatic dust remover is connected with the axial flow fan through the flue; the axial flow fan is connected with the smoke diffusing tower or the gas chamber through the flue; and the lower ends of the gravity settling chamber, the efficient heat pipe exchanger and the static dust remover are all provided with an ash discharge port. The device and the method are suitable for all converters and have the advantages of improving the dust removing effect compared with the OG method, making the emission index of smoke concentration lower than 20 mg/m<3>, greatly saving the cooling water and recycling a large amount of physical heat of the smoke.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of converter flue gas, and in particular provides a converter flue gas dry dust removal and waste heat recovery device and method thereof. Background technique [0002] At present, most domestic converter flue gas dedusting processes use wet dedusting, that is, OG method, and a few use LT method. These two dust removal methods have their own shortcomings in today's increasingly scarce energy sources and higher and higher environmental protection requirements: they do not recover the physical heat in the flue gas at 950-1100 °C after the vaporization cooling flue comes out, and spray it into the flue gas Sprinkling cooling water to cool down, consumes a lot of water resources and causes environmental pollution such as sludge and sewage. Contents of the invention [0003] The purpose of the present invention is to provide a converter flue gas dry dust removal and waste heat reco...

AI Technical Summary

Problems solved by technology

These two dust removal methods have their own shortcomings in today's increasingly scarce energy sources and higher and higher environmental protection requirements: they do not recover the physical heat in the flue gas at 950-1100 °C after the vaporization cooling flue comes out, and spray it into the flue gas Sprinkling cooling water to cool down, consumes a lot of water resources and causes environmental pollution such as sludge and sewage

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