Method and device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas

Abstract

The invention relates to a method and a device for sensible heat reclaiming of blast furnace slag and desulfurization of sintering flue gas, which is characterized by that: by introducing sintering flue gas to the technology process of sensible heat reclaiming of blast furnace slag, the environmental pollution of the sintering flue gas is reduced, and the processed blast furnace slag and desulphurization by-products are used for producing cement and gypsum respectively. The device comprises a granulation reactor, a vibration bed, a cooling pond, an exhaust-heat boiler, a generator and a filter No.1, wherein, the feed inlet of the granulation reactor is connected with the slag runner of the blast furnace, and the granulation reactor is connected with the vibration bed and cooling pond in order. Compared with the prior art, the invention has the beneficial effects that: according to a theory of using waste treat waste, by the three processes of desulphurization, sensible heat reclaimingand energy conversion, the purpose of using waste heat steam to generating power and removing SO2 from the sintering flue gas at the same time is realized, the prepared blast furnace slag and desulphurization by-products can be used for producing cement and gypsum respectively, the sensible heat of blast furnace slag is recovered effectively, and the sulfide is removed from sintering flue gas. The invention has a great social meaning.

Description

technical field [0001] The invention relates to the fields of sulfur-containing harmful gas treatment and energy recovery and utilization, in particular to a method and a device for recovering sensible heat of blast furnace slag and simultaneously desulfurizing sintering flue gas. Background technique [0002] At present, SO produced in the production process of the iron and steel industry 2 The total amount, accounting for more than 11% of the country's total emissions, is second only to power companies and ranks second in the country. Its emissions are about 1.5 million t / a to 1.8 million t / a, of which the sintering (including pelletizing) process Row of SO 2 It accounts for about 85% to 90% of the total amount in the production process. As of the end of May 2009, my country has built 35 sets of sintering flue gas desulfurization devices, 40 sintering machines for desulfurization, and a sintering desulfurization capacity of 82,000 tons. The currently used sintering flue...

AI Technical Summary

Problems solved by technology

However, at present, the water quenching method is mostly used for its treatment. The disadvantage of this method is that not only the sensible heat of blast furnace slag cannot be used, but also it causes a lot of waste of water resources, and it also causes serious pollution to the atmosphere, water and soil, and deteriorates the working environment.

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