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Sintering smoke treatment system and sintering smoke treatment method

A flue gas treatment system and sintering flue gas technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc. Oxygen content is high, achieving the effects of small footprint, low failure rate of equipment operation, and slow operation rhythm

Inactive Publication Date: 2012-07-18
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is: for large amount of sintering flue gas, complex composition of sintering flue gas, SO 2 Low concentration, high oxygen content in sintering flue gas, large fluctuations in sintering flue gas volume, temperature and other working conditions, overcome the problems that traditional sintering flue gas purification technology cannot comprehensively deal with various pollutants, low efficiency, and catalyst surface pollution, etc. Provide a treatment system and method for simultaneous desulfurization, denitrification, dioxin removal, heavy metal removal, dust removal and acid production of sintering flue gas, while enriching SO 2 The gas is prepared into high value-added industrial concentrated sulfuric acid, and the environmental protection index of sintering flue gas reaches the national standard, achieving significant social benefits

Method used

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Embodiment

[0112] Table 1

[0113]

[0114] In this embodiment, six adsorption towers 31 are connected in parallel.

[0115] The sintering flue gas in the sintering machine is led to the air inlet 31-2 of the adsorption tower 31 through the main exhaust fan 11 and the booster fan (adjustable vane axial flow fan) 33, and the outlet pressure of the main exhaust fan 11 is 500Pa. The flow rate of the sintering flue gas at the outlet of the booster fan 33 is 1,865,000m 3 N-wet / h. The above-mentioned sintering flue gas is evenly distributed to six adsorption towers 31 .

[0116] Gaseous pure ammonia at 150m 3 The flow rate of N / h is sent into the ammonia gas mixer 21, the air is heated to 130°C by the dilution air heater 23, and then the ammonia dilution fan 22 sends the heated air with a flow rate of 6700m 3 N / h is blown into the ammonia gas mixer 21, and ammonia gas is mixed with air in the ammonia gas mixer 21, so that the ammonia gas concentration is reduced to below 5%, and finall...

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Abstract

The invention provides a sintering smoke treatment system and a sintering smoke treatment mode, which are used in synchronized desulfuration, denitration, purification and acid making. The sintering smoke treatment system comprises a smoke system (1), an ammonia filling system (2), a smoke treatment system (3) and an acid making system (5), wherein the smoke system (1) comprises a main exhaust fan (11) and a chimney (12), the smoke treatment system (3) comprises an adsorption tower (31) and an analyzing tower (32), and the adsorption tower (31) and the analyzing tower (32) are connected with each other. The main exhaust fan (11) of the smoke system (1) and the chimney (12) are respectively connected with the adsorption tower (31), the analysis tower (32) of the smoke treatment system (3) is connected with the acid making system (5), and the adsorption tower (31) of the smoke treatment system (3) is connected with the chimney (12) of the smoke system (1).

Description

technical field [0001] The invention relates to a treatment system and method for sintering flue gas in the iron and steel industry, in particular to a treatment system and method for simultaneous desulfurization, denitrification, dioxin removal, heavy metal removal, dust removal and acid production of sintering flue gas. Background technique [0002] There are many sintering flue gas purification technologies. From the desulfurization method, there are dry method, wet method, and semi-dry method. The wet method desulfurization that is used more is evolved from the desulfurization technology of coal-fired power plants. However, according to the characteristics of sintering flue gas, The dry method has become the mainstream of sintering flue gas desulfurization technology, and the commonly used absorbents are CaO, CaCO 3 、Na 2 CO 3 , a small amount of waste residue, waste liquid, etc., and each desulfurization method has a variety of different process representatives. Acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/60
Inventor 刘复兴孟步祥李强赵德生李国喜赵宏高长涛
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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