Copper smelting furnace smoke waste heat utilizing and dust removing method

Abstract

A copper smelting furnace smoke waste heat utilizing and dust removing method is characterized in that smoke in a copper smelting furnace is exhausted from the interior of the furnace and mixed in cold air through a water cooling flue and then enters a settling chamber after carbon monoxide gas is combusted, the smoke enters a heat storage temperature homogenizing device, then enters a cyclone dust collector to be subjected to beforehand dust removing and then enters a waste heat exchange chamber, heat is released, the smoke enters a sinter-plate dust remover, and the smoke subjected to dust removing is pressed into an exhaust cylinder through a main draught fan and then exhausted to the atmosphere; and meanwhile circulating water absorbs heat of the smoke from a heat exchanger and becomes a steam water mixture to enter an evaporator, heat is released, organic working medium liquid absorbs heat of a smoke waste heat carrier through a low-pressure-level evaporator and a high-pressure-level evaporator and then becomes working medium steam, and the working medium steam does work in an organic turbine with a steam supplementing port in an expansion manner, and drives a power generator to generate power. The method is characterized in that R134a is adopted as a circulation organic working medium. The heat energy in the smoke can be recycled to the maximum degree to be converted into high-grade electric energy, the dust removing capability can be improved, and the environment-friendly effect is good.

Description

technical field [0001] The invention relates to a method for utilizing waste heat of copper smelting furnace flue gas to remove dust. Specifically, it can maximize the recovery of heat energy in the flue gas and convert it into high-grade electric energy, and can improve the ability of dust removal. It belongs to the technology of waste heat utilization and dust removal of copper smelting furnace field. Background technique [0002] The metallurgical industry consumes a large amount of energy every year, and the high-temperature flue gas generated during the smelting process and the heat dissipation of equipment take away a large amount of energy. Due to the high temperature of the flue gas from the copper smelting furnace, the temperature entering the pipeline is generally around 750°C, and the dust concentration reaches 15g / Nm 3 , the ash less than 5um accounts for more than 65% of the total amount of dust, the amount of dust is large, and it is sticky and fine. Moreover...

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Problems solved by technology

However, the actual steam output is far lower than the maximum evaporation capacity of the waste heat recovery device, resulting in the situation of large horses and small carts

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