Steel enterprise associated energy combined cycle power generation system and method

Abstract

The invention discloses a steel enterprise associated energy combined cycle power generation system, which comprises a fuel gas preparation sub system, a chemistry chain burning sub system and a hot-gas-steam combined cycle power generation sub system. The invention also discloses a steel enterprise associated energy combined cycle power generation method, which comprises the following steps of: extracting a mixed gas as a supply gas of a fuel reactor from a blast-furnace gas and / or a coke oven gas; generating reduction reaction between an oxygen carrier and the fuel gas in the fuel reactor so as to generate CO2 and steam; regenerating in an air reactor after an oxygen carrier reduced product passes through a material returning channel; generating power by exhausted gases from the air reactor and the fuel reactor and hot waste gases of a cooler in the hot-gas-steam combined cycle power generation sub system. By the power generation system, the CO2 emission pressure of the current steel enterprise can be relieved; moreover, the afterheat and the complementary energy of the steel enterprise can develop the great potential; and the generation method is simple and easy.

Description

technical field [0001] The invention mainly relates to the field of waste heat and energy recycling in metallurgical and iron and steel enterprises, and in particular to an associated energy combined cycle power generation system and power generation method in iron and steel enterprises. Background technique [0002] The energy consumption of my country's iron and steel industry accounts for 10% to 15% of the country's total energy consumption. Among them, the ironmaking process (sintering, blast furnace) affects the overall energy consumption of iron and steel enterprises and dust, SO 2 , CO 2 The discharge of pollutants such as pollutants has a great influence, accounting for more than 50%. The ironmaking process produces a large amount of secondary energy and waste heat and energy. The coal gas produced by ironmaking is equivalent to 20% to 25% of the total energy consumption, and the waste heat and energy produced by coking, sintering and blast furnace is equivalent to...

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Problems solved by technology

[0005] After analyzing the status quo of the recycling of associated energy in iron and steel enterprises, it is not difficult to find that although the associated energy in iron and steel enterprises has been recycled to varying degrees, it is confined to traditional recycling technologies and methods, and the effects of various associated energy are not significant due to scattered recycling. And without considering the overall perspective of iron and steel enterprises, it is necessary to consider how to efficiently, comprehensively and cascade the associated energy of different types and grades of iron and steel enterprises, so as to get rid of the shackles of the waste heat and energy recovery methods of traditional iron and steel enterprises

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