Iron ore sintering flue gas PM10 and PM2.5 emission reduction method

A technology for sintering flue gas and PM10, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of large flue gas flow, complex composition, limited emission reduction effect, etc.

Active Publication Date: 2016-07-06
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0009] (5) The composition of the flue gas is complex, which contains a variety of pollutants, such as: fine particulate matter, SO 2 , COx, NOx, HCl, HF and dioxins, etc.
Such as: the name of the invention: industrial kiln flue gas PM 2.5 Dust and heavy metal treatment and removal device [9] , (Chinese patent number: ZL201220721358.X, application date: 2012-12-24), by setting a filter bag on the flue gas passage, and placing the bag cage inside the filter bag, the PM 2.5 Dust emission reduction; this technology has a good emission reduction effect on large particle pollutants, but the PM in the flue gas 2.5 The emission reduction effect is limited
In addition, the name of the invention is: a method for segmental circulation of iron ore sintering flue gas [10] (Chinese

Method used

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  • Iron ore sintering flue gas PM10 and PM2.5 emission reduction method
  • Iron ore sintering flue gas PM10 and PM2.5 emission reduction method
  • Iron ore sintering flue gas PM10 and PM2.5 emission reduction method

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Example Embodiment

[0057] Example 1

[0058] Combine Picture 10 with Picture 11 As shown in this embodiment, a method for reducing PM10 and PM2.5 of iron ore sintering flue gas: during the iron ore sintering process, agglomeration liquid is sprayed into the flue gas channel of the sintering flue gas, and the fine particles in the sintering flue gas Agglomerate and grow up under the action of the agglomeration liquid, and the dust removal device 4 is used to remove the agglomerated and grown fine particles.

[0059] A composite agglomeration agent for reducing smoke fine particles, each component is composed of the following masses: polyaluminum chloride 10g, sodium carboxymethyl cellulose 30g, polyacrylamide 30g, and additive 2g. The additive is a solid additive, and the additive is composed of activated carbon and coke powder. The additive is composed of the following mass percentages: 90% activated carbon, 10% coke powder, and the activated carbon particle size requirement: 74μm≤activated carbon...

Example Embodiment

[0107] Example 2

[0108] The basic content of this embodiment is the same as that of embodiment 1, and the difference is that the additives are composed of activated carbon and zeolite, and the additives are composed of the following mass percentages: activated carbon 85%, zeolite 15%, and the activated carbon particle size requirements: 74μm≤activated carbon particle size≤100μm, zeolite particle size requirement: 74μm≤zeolite particle size≤100μm.

[0109] The emission concentration of PM2.5 and PM10 in the sintering flue gas after the dust removal device 4 is detected, and the emission reduction efficiency of PM2.5 and PM10 is calculated. The emission reduction efficiency of PM2.5 is 56.4%, and the emission reduction efficiency of PM10 is 49.0%.

Example Embodiment

[0110] Example 3

[0111] The basic content of this embodiment is the same as that of embodiment 1, and the difference is that the additive is composed of activated carbon and zeolite, and the additive is composed of the following mass percentages: activated carbon 95%, zeolite 5%.

[0112] The emission concentration of PM2.5 and PM10 in the sintering flue gas after the dust removal device 4 is detected, and the emission reduction efficiency of PM2.5 and PM10 is calculated. The emission reduction efficiency of PM2.5 is 60.2%, and the emission reduction efficiency of PM10 is 48.8%.

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Abstract

The invention discloses an iron ore sintering flue gas PM10 and PM2.5 emission reduction method, belonging to the technical field of reduction of emission of pollutants in an iron ore sintering process. According to the method, in an iron ore sintering process, an agglomeration solution is sprayed in a sintering flue gas channel, and fine particulate matter in sintering flue gas is agglomerated and grows up under the action of the agglomeration solution, and then is removed by a dedusting device; the agglomeration agent comprises polymeric aluminium chloride, sodium carboxymethylcellulose, polyacrylamide and a solid additive. According to the iron ore sintering flue gas PM10 and PM2.5 emission reduction method, the droplets of the agglomeration solution adsorbing fine particulate matter are nucleated and collided and grow up under low pressure to form large particle agglomerates, the agglomerated and grown fine particulate matter is removed by the dedusting device, and high-efficiency emission reduction of the fine particulate matter is realized. Therefore, the method can provide a brand-new means for reduction of emission of fine particulate matter in an iron ore sintering process.

Description

technical field [0001] The invention relates to the technical field of pollutant emission reduction in the iron ore sintering process, and more specifically, relates to a method for reducing emission of PM10 and PM2.5 in iron ore sintering flue gas. Background technique [0002] Inhalable particulate matter refers to the general term for particulate matter that can enter the human respiratory tract through the nose and mouth, represented by PM10 (particles with an aerodynamic diameter of less than 10 microns in the ambient air). PM2.5 refers to particulate matter in the ambient air with an aerodynamic equivalent diameter less than or equal to 2.5 microns. It can be suspended in the air for a long time, and the higher its concentration in the air, the more serious the air pollution. Although PM2.5 is only a small component of the earth's atmospheric composition, it has an important impact on air quality and visibility. Compared with coarser atmospheric particles, PM2.5 has ...

Claims

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Application Information

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IPC IPC(8): B01D47/06B01D50/00B01D53/79B01D53/60
CPCB01D47/06B01D50/00B01D53/10B01D53/60B01D53/79B01D2258/0283B01D2247/02B01D2253/102B01D50/60
Inventor 春铁军吴雪健龙红明王欢李家新狄瞻霞王平孟庆民宁超钱立新
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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