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

A flue gas and liquid contact device technology, applied in the field of flue gas treatment, can solve the problems of poor treatment effect, poor pertinence, and intermittently excessive sulfur dioxide concentration, so as to reduce equipment investment, solve the problem of up-to-standard emission, and increase the difficulty of treatment. and cost effect

Active Publication Date: 2017-01-25
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Send the liquid caustic soda with a concentration of 31.5% to the liquid caustic soda circulation tank, add water to make a dilute caustic soda with a concentration of 10.3%, add the acid water to the desulfurization tower, after reaching a certain level, turn on the acid water circulation pump, and send the acid water to the desulfurization tower. To the acid water spraying device of the desulfurization tower, it is passed into the smelting flash furnace to collect the flue gas, and the acid water spraying device is started to wash and cool the flue dust in the flue gas for the first time; to detect the concentration of sulfur dioxide in the flue gas. When the standard is met, turn on the liquid alkali circulating pump and run it for 24 hours. The concentration of sulfur dioxide in the flue gas collected at the entrance of the desulfurization tower: 437mg / Nm 3 ~6185mg / Nm 3 , the average concentration is 2818mg / Nm 3 , dust concentration: 63-194mg / Nm 3 , with an averag...

Embodiment 2

[0020] Send the liquid caustic soda with a concentration of 31.5% to the liquid caustic soda circulation tank, add water to prepare a dilute caustic soda with a concentration of 10.3%, add the acid water to the desulfurization tower, after reaching a certain level, turn on the sour water circulation pump, and send the water to The acid water spraying device of the desulfurization tower is connected to the smelting reverberatory furnace to collect the flue gas, and the acid water spraying device is started to wash and cool the dust in the flue gas collected for the first time; the concentration of sulfur dioxide in the flue gas is not up to standard, Turn on the liquid alkali circulation pump and run for 24 hours, the concentration of sulfur dioxide in the flue gas: 553mg / Nm 3 ~16185mg / Nm 3 , with an average concentration of 3826mg / Nm 3 , dust concentration: 69-732mg / Nm 3 , average concentration: 422mg / Nm 3 , Flue gas volume: 93256Nm 3 / h~103851Nm 3 / h, the average gas vol...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/50B01D53/96B01D50/00
CPCB01D50/00B01D53/50B01D53/78B01D53/96B01D2257/60B01D2258/0283
Inventor 迟建孙治忠陆铮迟栈洋贾小军苏青天王元璞牟建国马宗仁
Owner JINCHUAN GROUP LIMITED
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