Flue gas desulfurization system for sintering machines

Abstract

The invention discloses a flue gas desulfurization system for sintering machines, which comprises a reactor, a flue gas induced draft unit, a state separating unit, a solid feedback and filling unit, an absorbent addition unit and a data acquisition unit. Flue gas from the sintering machine enters the reactor from the bottom after passing through a pre-deduster; the bottom of the reactor is in a venturi structure, and glue gas is accelerated when flowing through the bottom of the reactor; after being accelerated when passing through the venturi part on the bottom of the reactor, the flue gas enters a circulating fluid bed body on the upper part; the absorbent is injected into the bottom of the reactor through an injection device, and circulating desulfurization ash is send into the reactor from the other side of the bottom of the reactor; the absorbent and circulating desulfurization ash are suspended to form a fluid bed under the impact action of the accelerated flue gas; the material in the circulating fluid bed forms a gas-solid two-phase flow mechanism under the action of gas flow, thereby greatly strengthening mass transfer and heat transfer between gas and solid; and thus, the material is thoroughly mixed with the flue gas to complete the desulfurization reaction. The invention has the advantages of high desulfurization efficiency, low device abrasion, low operating cost and reliable operation.

Description

technical field [0001] The invention relates to a desulfurization system, in particular to a desulfurization system connected with a flue gas sintering machine in the metallurgical industry. Background technique [0002] In recent years, the steel industry has been reducing SO emissions 2 A lot of work has been done, such as the use of low-sulfur coal and the gradual adoption of desulfurization measures for coal-fired boilers. This has made my country's iron and steel industry SO 2 The increase in emissions has slowed considerably. However, due to the slow development of sintering pellet process desulfurization in my country, its SO 2 Emissions are still on the rise, accounting for the entire steel industry SO 2 The proportion of emissions is also increasing, so sintering flue gas desulfurization has become a necessary measure for energy conservation and emission reduction in my country's iron and steel enterprises, and it is urgent. [0003] The sintering flue gas in th...

AI Technical Summary

Problems solved by technology

However, the desulfurization rate and absorbent utilization rate of the semi-dry method are low, and when the sulfur content is high, the transportation cost is high

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