Copper smelting furnace high-temperature flue gas two-stage organic Rankine cycle waste heat power generating method

Abstract

Disclosed is a copper smelting furnace high-temperature flue gas two-stage organic Rankine cycle waste heat power generating method. The method is characterized in that copper smelting furnace flue gas is exhausted from a furnace and mixed with cold air through a water cooling flue, enters a setting chamber after carbon monoxide is combusted, then enters a heat accumulating temperature evener, then enters a high-temperature heat pipe evaporator and a waste heat exchanging chamber to give out heat, then enters a dust cleaner, and lastly is exhausted to the atmosphere by being pressed into an exhaust funnel through a main fan after dust is cleaned; meanwhile, circulating water absorbs heat of the flue gas from a heat exchanger to form a steam-water mixture, and then the steam-water mixture enters the evaporator to release the heat; organic working medium liquid absorbs heat from flue gas waste heat carriers in a low-pressure-stage evaporator and a high-pressure-stage evaporator and becomes working medium steam to expand and work in an organic turbine, which is provided with a steam replenishing port, and to drive a generator to generate power. The copper smelting furnace high-temperature flue gas two-stage organic Rankine cycle waste heat power generating method is characterized in that R134a is utilized as the circulating organic working medium. The copper smelting furnace high-temperature flue gas two-stage organic Rankine cycle waste heat power generating method can recover heat energy inside the flue gas to the maximum degree and convert the heat energy into high-grade electric energy, improve the dust cleaning capacity and achieve good environmental protection effects.

Description

technical field [0001] The invention relates to a secondary organic Rankine cycle waste heat power generation method for high-temperature flue gas of a copper smelting furnace. Specifically, the heat energy in the flue gas can be recovered to the maximum extent and converted into high-grade electric energy, and the dust removal ability can be improved. It belongs to copper smelting Furnace waste heat utilization and dust removal technology 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...

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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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