Cupola smoke temperature uniformizing type waste heat power generation, energy conservation and dust removal method

Abstract

A cupola smoke temperature uniformizing type waste heat power generation, energy conservation and dust removal method is characterized in that cupola smoke is exhausted out of a cupola, cold air is mixed into the cupola smoke through a water-cooling flue, and after carbon oxide is combusted, the mixture enters a sedimentation chamber, enters a heat storage temperature uniformizing device, enters a high-temperature heat pipe evaporator, enters a flow uniformizing waste heat exchange chamber, sends out heat, enters a sinter-plate dust remover, is pressed into an exhaust cylinder through a main air blower after dust removal is conducted and is then discharged into the atmosphere; meanwhile, circulating water absorbs heat of smoke in the heat exchanger to form a smoke-water mixture to enter the evaporator and send out heat, an organic liquid working medium absorbs heat of smoke waste heat carriers in a low-pressure stage evaporator, an intermediate-pressure stage evaporator and a high-pressure stage evaporator to become working medium steam, and the working medium steam expands to act in an organic turbine with steam supplementing openings and drives an electric generator to generate electricity; an R141B is adopted as a circulating organic working medium. By means of the method, heat in recovered smoke can be converted into high-level electric energy to the maximum extent, the dust removal capacity can be improved, and the good environment protection effect is achieved.

Description

technical field [0001] The invention relates to an energy-saving dust removal method for cupola flue gas uniform temperature waste heat power generation. 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 dust removal ability. It belongs to the utilization of cupola waste heat and Dust removal technology field. Background technique [0002] The iron and steel 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 cupola steelmaking flue gas, the temperature entering the pipeline is generally around 650°C, and the dust concentration reaches 18g / Nm 3 , the ash less than 8um accounts for more than 75% of the total amount of dust, the amount of dust is large, and it is sticky and fine. Moreover, the temperatur...

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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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