A method for segmenting sintering flue gas and utilizing vertical cooling kiln to reduce emission of sulfur and nitrogen oxides
A technology for sintering flue gas and nitrogen oxides, which is applied in the field of sintering flue gas segmentation and the use of vertical cooling kilns to reduce sulfur and nitrogen oxides, can solve the problem of high penetration rate of sintering desulfurization devices, lack of feasible technologies for de-sintering and nitrification, and sintering. The problems of low utilization rate of mine sensible heat, etc., achieve the effect of significant comprehensive emission reduction, cost reduction, and efficient recovery.
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[0052] Take a company 270m 2 Taking the sintering machine as an example, there are 24 bellows in total, and the flue gas concentration is shown in the table below.
[0053]
[0054]
[0055] Mix the flue gas in No. 1-14 sintering bellows to high NO X The mixture of denitrification flue gas and No. 15-24 bellows flue gas is high SO 2 Desulfurization flue gas, high NO after mixing X The flue gas volume of denitrification flue gas is 195,000 m 3 / h, temperature 88℃, SO 2 Concentration 88mg / m 3 , NO X Concentration 229mg / m 3 ; high SO 2 The flue gas volume of desulfurization flue gas is 241,000 m 3 / h, temperature 231℃, SO 2 Concentration 1491mg / m 3 , NO X Concentration 84mg / m 3 .
[0056] will be high NO X The denitrification flue gas exchanges heat with the hot sinter in the vertical cold kiln, and the temperature of the flue gas after heat exchange can reach 350 ° C ~ 450 ° C; the heat supplement is used to supplement the heat of the flue gas after heat exch...
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