A method to improve the pm of iron ore sintering flue gas electric dust removal process 2.5 The method of removal efficiency

A technology for sintering flue gas and removal efficiency, which is applied in the field of improving the removal efficiency of PM2.5 in the electric dust removal process of iron ore sintering flue gas, and in the field of sintering flue gas treatment. It can solve the problems of low emission concentration, large sintering flue gas flow rate, Implementation and other issues to achieve the effect of improving conductivity
CN108283875BActive Publication Date: 2020-12-04CENT SOUTH UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2020-12-04

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Abstract

The invention discloses a method of improving PM2.5 removal efficiency in an electric precipitation process of iron ore sintering smoke. The method comprises the steps of dividing the smoke generatedby sintering into sintering front section smoke (a low PM2.5 emission concentration, and mainly comprising Fe, Ca and O), sintering middle section smoke (a high PM2.5 emission concentration and mainlycomprising K, Na, Pb and Cl) and sintering rear section smoke (a low PM2.5 emission concentration and high smoke temperature), leading the sintering front section smoke and the middle section smoke into a low temperature flue and a middle temperature flue, regulating the temperature of the low temperature flue to be higher than an acid dew point and the temperature of the middle temperature flueto 180-220 DEG C via the sintering rear section smoke, spraying a smoke conditioning agent into the middle temperature flue at the same time, and removing PM2.5 from the smoke in the two flues via a conventional electrostatic precipitator. The PM2.5 removal efficiency of the electric precipitator is improved by sintering smoke segmentation, flue temperature regulating, and regulating of a PM2.5 ingredient in the smoke and specific resistance by spraying the conditioning agent.
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Description

technical field

[0001] The invention relates to a treatment method for sintering flue gas, in particular to a method for improving PM in the electric dust removal process of iron ore sintering flue gas. 2.5 The invention relates to a method for removing efficiency; it belongs to the technical field of iron and steel metallurgy flue gas treatment. Background technique

[0002] PM 2.5 Refers to particles with an aerodynamic diameter of less than or equal to 2.5 μm, which can enter the alveoli of the human body, so they are also called lung-entering particles. Because of its small particle size and large specific surface area, it is easy to load heavy metals (Pb, Zn, As, Hg, etc.), persistent organic pollutants (PCDD / Fs, PCBs, etc.), germs and other toxic and harmful substances, which pose a serious threat to human health. threaten. In recent years, severe smog that frequently occurs in large and medium-sized cities in my country is mainly caused by PM emitted by industrial ...

Claims

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