Treatment device and method for smelting flue gas collected from fugitive emission

Abstract

The invention particularly relates to a treatment device and method for smelting flue gas collected from fugitive emission. The treatment device comprises a desulfurizing tower; the desulfurizing tower comprises a tower body, and a demister and an alkaline liquid spraying device which are sequentially arranged in the tower body from top to bottom; a flue gas inlet, an acid water outlet and a drain outlet are formed in the side wall of the tower body; a flue gas outlet is formed in the top of the tower body; an alkaline liquid receiving device and an acid water spraying device are also sequentially arranged below the alkaline liquid spraying device; the alkaline liquid spraying device comprises a plurality of U-shaped grooves; and a gas-liquid separation cover supported by a supporting plate is arranged between two adjacent U-shaped grooves. On one hand, the treatment device realizes the dedusting and desulfurization treatment to flue gas to recover heavy metals in the flue gas and prevent the heavy metals from entering alkaline liquid and being absorbed to change the absorbed liquid slag to dangerous waste slag to increase the treatment difficulty and cost of the absorbed liquid; on the other hand, the recycling of the alkaline liquid can be realized, two functions with one tower can be realized, the equipment investment, alkali consumption and running cost can be effectively lowered, and the up-to-standard emission problem of the flue gas collected from fugitive emission can be solved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to a processing device and method for collecting flue gas in a smelting ring. Background technique [0002] During the smelting process of sulfide ore, a large amount of low-concentration sulfur dioxide flue gas is produced, which is directly discharged into the environmental protection chimney and pollutes the surrounding environment. As the country's environmental protection requirements become more and more stringent, higher requirements are put forward. Concentration of sulfur dioxide ring collection flue gas needs to be treated before being discharged. The flue gas collected in the smelting ring is mainly from the flue gas produced by the furnace melt outlet, the feeding port, the sinking electric furnace, the depleted electric furnace lowering the nickel matte outlet, the slag outlet, the melt inlet, the feeding port, the slag bag, etc. The composition of the flue ...

AI Technical Summary

Problems solved by technology

The flue gas collected in the smelting ring is mainly from the flue gas produced by the furnace melt outlet, the feeding port, the sinking electric furnace, the depleted electric furnace lowering the nickel matte outlet, the slag outlet, the melt inlet, the feeding port, the slag bag, etc. The composition of the flue gas produced by the fixed fume hood, rotating fume hood and the back of the furnace, etc., among which, the dust content and sulfur dioxide concentration of the ring-collected flue gas generated by the slag discharge port, feed port, slag bag and other parts intermittently exceed the standard. At present, the low Concentrated sulfur dioxide flue gas is generally treated by liquid alkali absorption, which is not targeted and the treatment effect is not good

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