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Sintering process based on coupling of sintering flue gas quality-divided circulation and flue gas pollutant emission reduction

A technology for sintering flue gas and pollutants, applied in separation methods, gas treatment, and separation of dispersed particles, etc., can solve the problems of large investment, high operating costs, and difficult disposal of waste catalysts

Active Publication Date: 2021-03-30
江苏集萃冶金技术研究院有限公司 +2
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  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at a series of problems such as large investment in desulfurization and denitrification of existing sintering flue gas, high operating cost, and difficult disposal of waste catalysts, the present invention provides a simple process scheme, no outsourcing of catalysts, energy saving and consumption reduction, small footprint, and flue gas denitrification A sintering process based on sintering flue gas separation cycle coupled with flue gas pollutant emission reduction with low equipment investment and operating costs

Method used

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  • Sintering process based on coupling of sintering flue gas quality-divided circulation and flue gas pollutant emission reduction
  • Sintering process based on coupling of sintering flue gas quality-divided circulation and flue gas pollutant emission reduction

Examples

Experimental program
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Effect test

Embodiment 1

[0063] see figure 1 , including the sintering air flow in the fan (including high temperature circulating flue gas fan 5-1, low temperature circulating flue gas fan 5-2, high SO 2 The flue gas fan 5-4) passes through the 3 sintered material layer 3.1 of the sintered mixture, the sintered base material 3.2, the sintering machine 2, the trolley grate 2.1, the bellows 15 below the trolley 2.1 and enters the main flue (including Low temperature flue gas main flue 16-1, high SO 2 flue gas main flue 16-2, high temperature flue gas main flue 16-3); along the traveling direction of sintering machine 2 trolley 2.1, sintering machine 2 is divided into ignition area, low temperature flue gas area, SO 2 Rapidly increasing concentration area, SO 2 There are 5 areas, namely the rapidly decreasing concentration area and the high temperature flue gas area. The sintering mixture 3 is evenly distributed to the sintering machine 2 trolley 2.1 by the lowering hopper 13 and the distribution mac...

Embodiment 2

[0072] see figure 2 , including the sintering airflow passing through the sintering material layer 3.1 of the sintering mixture 3, the sintering base material 3.2, and the sintering machine 2 trolleys 2.1 grate, bellows 15 below trolley 2.1 enter the main flue (including low-temperature flue gas main flue 16-1, high-temperature flue gas main flue 16-3); Machine 2 is divided into ignition area, low-temperature flue gas area, SO 2 Rapidly increasing concentration area, SO 2 There are 5 areas, namely the rapidly decreasing concentration area and the high temperature flue gas area. The sintering mixture 3 is evenly distributed to the sintering machine 2 trolley 2.1 by the lowering hopper 13 and the distribution machine 14, and through the lowering chute 12. Driven by the rear trolley 2.1, the trolley 2.1 carrying the sintered material layer 3.1 and the sintered bottom material 3.2 advances to the bottom of the ignition system 11, and ignites and sinters. Under the suction eff...

Embodiment example 3

[0078] see figure 1 , including the sintering air flow in the fan (including high temperature circulating flue gas fan 5-1, low temperature circulating flue gas fan 5-2, high SO 2 The flue gas fan 5-4) passes through the 3 sintered material layer 3.1 of the sintered mixture, the sintered base material 3.2, the sintering machine 2, the trolley grate 2.1, the bellows 15 below the trolley 2.1 and enters the main flue (including Low temperature flue gas main flue 16-1, high SO 2 flue gas main flue 16-2, high temperature flue gas main flue 16-3); along the traveling direction of sintering machine 2 trolley 2.1, sintering machine 2 is divided into ignition area, low temperature flue gas area, SO 2 Rapidly increasing concentration area, SO 2 There are 5 areas, namely the rapidly decreasing concentration area and the high temperature flue gas area. The sintering mixture 3 is evenly distributed to the sintering machine 2 trolley 2.1 by the lowering hopper 13 and the distribution mac...

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Abstract

The invention relates to a sintering process based on coupling of sintering flue gas quality-divided circulation and flue gas pollutant emission reduction. According to the technical scheme, the sintering process comprises a sintering machine trolley, sintering airflow, flue gas formed after combustion-supporting sintering, a sintering mixture and sintered ore formed after sintering. A sintering machine is sequentially divided into an ignition area, a low-temperature flue gas area, a SO2 concentration rapid increasing area, a SO2 concentration rapid decreasing area and a high-temperature fluegas area in the advancing direction of the trolley, and sintering flue gas is collected through a low-temperature flue gas main flue, a high-SO2 flue gas main flue and a high-temperature flue gas mainflue. Sintering flue gas of the low-temperature flue gas main flue is desulfurized by spraying excessive ammonia water and then enters a sinter cooling furnace to be denitrified, sintering flue gas of the high-SO2 flue gas main flue is mixed with oxygen and then enters a high-temperature flue gas circulation cover above the sintering material layer of the low-temperature flue gas area, and underthe suction effect of the draught fan, the sintering flue gas enters the sintering material layer again to serve as combustion-supporting air to participate in sintering. The method is simple in process, low in investment and low in operation cost.

Description

technical field [0001] The invention relates to an industrial flue gas purification process in the field of environmental protection, in particular to a sintering process based on sintering flue gas separation cycle coupling flue gas pollutant emission reduction. Background technique [0002] With the continuous improvement of the country's environmental protection requirements in recent years, the sintering flue gas of domestic iron and steel enterprises has been desulfurized and denitrified. [0003] Flue gas desulfurization technology can be divided into dry and wet desulfurization technologies, dry technology mainly refers to circulating fluidized bed technology, wet technology mainly includes limestone / lime-gypsum method, ammonia-ammonium sulfate method, double subtraction method and seawater desulfurization technology . The sintering flue gas has the characteristics of large fluctuating flue gas volume, and the circulating fluidized bed technology has the technical ri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/86B01D53/56B01D53/78
CPCB01D53/8625B01D53/501B01D2258/0283B01D2255/20738B01D2251/2062
Inventor 吴高明许丽娟李牧明柯尊华汪芮童为硕
Owner 江苏集萃冶金技术研究院有限公司
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