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Desulfurization and denitrification method for sintering flue gas

A technology of sintering flue gas, desulfurization and denitrification, applied in the field of desulfurization and denitrification, can solve the problems of secondary pollution, etc., and achieve the effect of low equipment investment, simple process and short process flow

Inactive Publication Date: 2020-03-27
西安润川环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a desulfurization and denitration method for sintering flue gas, which solves the problem of secondary pollution caused by the desulfurization and denitration method for sintering flue gas in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The sintering flue gas in the sintering flue is passed into the spray tower, and sprayed to cool down to 10°C; the sintered flue gas after spraying and cooling is passed into the adsorption tower containing microcrystalline adsorbent, and the gas after adsorbing sulfide and nitrogen oxides Discharge through the chimney; regenerate the adsorption tower saturated with adsorbed sulfides and nitrogen oxides with hot air, pass the regenerated flue gas into the oxidation tower containing the oxidation catalyst, and then pass it into the regeneration tail gas desulfurization tower after catalytic oxidation, and use water Or after the lye is sprayed, it is discharged into the cooling tower.

[0025] Specifically, the spray liquid after spraying enters the wastewater treatment system or salt extraction system, the number of adsorption towers is at least three, the operating temperature of the adsorption bed is 50°C, the operating pressure of the adsorption bed is 1KPa, and the ly...

Embodiment 2

[0027] The sintering flue gas in the sintering flue is passed into the spray tower, and sprayed to cool down to 60°C; the sintered flue gas after spraying and cooling is passed into the adsorption tower containing microcrystalline adsorbent, and the gas after adsorbing sulfide and nitrogen oxides Discharge through the chimney; regenerate the adsorption tower saturated with adsorbed sulfides and nitrogen oxides with hot air, pass the regenerated flue gas into the oxidation tower containing the oxidation catalyst, and then pass it into the regeneration tail gas desulfurization tower after catalytic oxidation, and use water Or after the lye is sprayed, it is discharged into the cooling tower.

[0028] Specifically, the spray liquid after spraying enters the wastewater treatment system or the salt extraction system, the number of adsorption towers is at least three, the operating temperature of the adsorption bed is 110°C, the operating pressure of the adsorption bed is 25KPa, and ...

Embodiment 3

[0030] The sintering flue gas in the sintering flue is passed into the spray tower, and sprayed to cool down to 20°C; the sintered flue gas after spraying and cooling is passed into the adsorption tower containing microcrystalline adsorbent, and the gas after adsorbing sulfide and nitrogen oxides Discharge through the chimney; regenerate the adsorption tower saturated with adsorbed sulfides and nitrogen oxides with hot air, pass the regenerated flue gas into the oxidation tower containing the oxidation catalyst, and then pass it into the regeneration tail gas desulfurization tower after catalytic oxidation, and use water Or after the lye is sprayed, it is discharged into the cooling tower.

[0031] Specifically, the spray liquid after spraying enters the wastewater treatment system or the salt extraction system, the number of adsorption towers is at least more than three, the operating temperature of the adsorption bed is 80°C, the operating pressure of the adsorption bed is 15...

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Abstract

The invention discloses a desulfurization and denitrification method for sintering flue gas. The method is specifically implemented according to the following steps of (1), introducing the sintering flue gas in a sintering flue into a spray tower, and carrying out spray cooling to 10-60 DEG C; (2), introducing the sintering flue gas subjected to spray cooling into adsorption towers containing microcrystalline adsorbents, and discharging gas absorbing sulfide and nitrogen oxide through a chimney; and (3), regenerating the saturated adsorption tower for adsorbing the sulfide and nitrogen oxide with hot air, introducing regenerated flue gas into an oxidation tower containing an oxidation catalyst, performing catalytic oxidation, introducing the gas into a regenerated tail gas desulfurizationtower, spraying with water or alkali liquor, introducing the gas into a cooling tower, and discharging the gas. The problem of secondary pollution caused by the desulfurization and denitrification method for the sintering flue gas in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of desulfurization and denitrification, and relates to a method for desulfurization and denitrification of sintering flue gas. Background technique [0002] Coal is the most important natural energy in my country. As the second largest coal-consuming field in China, coal coking is one of the main pollution sources in the field of industrial coal use. Sintering flue gas is an important pollution source of the atmosphere. Currently, sintering flue gas desulfurization is widely used in the field of Wet desulfurization technology and semi-dry desulfurization technology represented by ammonia method, limestone method, double alkali method and magnesium oxide method. The absorption and utilization rate of wet desulfurization is high, but such as limestone-gypsum method, double alkali method, and magnesium oxide method, the slurry contains tiny hydrophilic ions, which are carried out by the flue gas and discharged i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/56B01D53/86B01D53/78
CPCB01D53/02B01D53/501B01D53/56B01D53/86B01D2251/2062B01D2251/304B01D2251/604B01D2251/606B01D2251/404B01D2259/4009
Inventor 李伟
Owner 西安润川环保科技有限公司
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