Integral blast furnace combined circulation method

Abstract

The present invention mainly relates to blast furnace ironmaking, power generation and oxygen generation. It is characterized by that in the blast furnace ironmaking system the oxygen-making system and combined circulation power generation system are integrated. The gas produced by smelting iron with blast furnace is undergone the processes of removing dust, cooling and compression and fed into combustino chamber of gas turbine to make combustion , then the high temp. gas produced by combustion is expanded, and can be used for driving gas turbine and making it apply work to drive power generator to generate power, and the high-temp. waste gas discharged by gas turbine and combustion waste gas of air-stove can be fed into waste heat boiler, and the produced steam can be used for driving steam turbine and making it apply work to drive power generator to generate power.

Description

technical field [0001] The invention belongs to the field of metallurgy and energy, and mainly relates to blast furnace ironmaking, power generation and oxygen production. Background technique [0002] Although some achievements have been made in the development of non-blast furnace ironmaking technology in the world, according to the forecast of metallurgical experts, blast furnace will still play a leading role in ironmaking production for a long time to come. The continuous advancement of blast furnace technology represented by oxygen-enriched coal injection and fine materials has further consolidated the status of blast furnaces. [0003] In order to save precious coking coal resources and reduce environmental pollution in the coking process, the international community attaches great importance to the development and promotion of blast furnace oxygen-enriched coal injection technology. Instead, increase the amount of coal injection by increasing the blast temperature, ...

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Problems solved by technology

Energy-saving technologies such as blast furnace gas power generation, blast furnace gas residual pressure recovery (TRT), and blast furnace hot blast stove waste heat recovery have been widely used. However, the application of these technologies is independent of each other and lacks a unified plan. The confinement of the target failed to change the iron-centered appearance of the blast furnace (Zhao Pei, Jiang Hanhua, "Analysis of Iron and Steel Metallurgy Energy Technology", Beijing: Metallurgical Industry Press, 2002)

[0006] Recently, IGCC-Integrated Gasification Combined Cycle (IGCC-Integrated Gasification Combined Cycle) has been developed internationally. It combines coal gasification technology with efficient combined cycle power generation technology. As a result, the power generation efficiency of coal is significantly improved. X and NO X The emissions are greatly reduced, and its disadvantage is that the cost of power generation is relatively high, and it is difficult to promote it on a large scale (Duan Liqiang, Lin Rumou, Jin Hongguang, Cai Ruixian

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