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A preparation method of agglomeration liquid for suppressing emission of fine particles in iron ore sintering flue gas

A technology for sintering flue gas and fine particles, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of large flue gas flow, complex flue gas components, and complex components, so as to speed up the agglomeration speed and improve the Effective collision probability, the effect of improving agglomeration efficiency

Active Publication Date: 2018-01-30
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 patent number: ZL201310443223.0, application date: 2013-09-26), a method for energy saving and emission reduction of iron ore sintering [11] (Chinese patent number: ZL201510137762.0, application date: 2015-03-27), etc., these technical solutions can realize the coordinated emission reduction of various pollutants in the sintering flue gas, although it can reduce the emission of large particles of dust in the flue gas ; but the emission reduction effect on fine particulate matter in sintering flue gas is extremely limited
In addition, compared with other exhaust gases, sintering flue gas has complex composition and huge flue gas flow rate, so that effective emission reduction technologies suitable for fine particulate matter in sintering flue gas have not yet been developed.

Method used

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  • A preparation method of agglomeration liquid for suppressing emission of fine particles in iron ore sintering flue gas
  • A preparation method of agglomeration liquid for suppressing emission of fine particles in iron ore sintering flue gas
  • A preparation method of agglomeration liquid for suppressing emission of fine particles in iron ore sintering flue gas

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Embodiment 1

[0058] to combine Figure 4 and Figure 5 As shown, the preparation method of the agglomeration liquid that suppresses the emission of fine particulate matter in iron ore sintering flue gas in this embodiment is: a composite agglomerating agent for emission reduction of fine particulate matter in flue gas, and each component is composed according to the following mass: polyaluminum chloride 10g, carboxymethyl Sodium cellulose base 30g, polyacrylamide 30g, 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 and 10% coke powder. 100μm, coke powder particle size requirement: 74μm≤coke powder particle size≤100μm.

[0059] The preparation method of the present embodiment reunion liquid is:

[0060] (A) Weigh 10 g of polyaluminum chloride, 30 g of sodium carboxymethyl cellulose, and 30 g of polyacrylamide in parts by mass, and mix 10 g of s...

Embodiment 2

[0107] The basic content of this embodiment is the same as that of Example 1, except that the additive is composed of activated carbon and zeolite, and the additive is composed of the following mass percentages: 85% of activated carbon and 15% of zeolite, and the particle size of the activated carbon requires: 74μm≤activated carbon particle size≤100μm, zeolite particle size requirement: 74μm≤zeolite particle size≤100μm.

[0108] Detect the emission concentration of PM2.5 and PM10 in the sintering flue gas after the dust removal device 4, and calculate the emission reduction efficiency of PM2.5 and PM10. The emission reduction efficiency of PM2.5 is 56.4%, and the emission reduction efficiency of PM10 is 49.0%.

Embodiment 3

[0110] The basic content of this embodiment is the same as that of Example 1, except that the additive is composed of activated carbon and zeolite, and the additive is composed of the following mass percentages: 95% of activated carbon and 5% of zeolite.

[0111] Detect the emission concentration of PM2.5 and PM10 in the sintering flue gas after the dust removal device 4, and calculate the emission reduction efficiency of PM2.5 and PM10. 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 a method for preparing agglomeration liquid for restraining iron mine sintering flue gas fine particle emissions, and belongs to the technical field of iron mine sintering process pollutant emission reduction .The method comprises the specific steps that A, 20-40 parts of polyacrylamide, 0-20 parts of aluminium polychlorid, 20-40 parts of sodium carboxymethylcellulose and 20-40 parts of polyacrylamide are mixed to be uniform, and a mixture A is obtained; B, 2-5 parts by mass of additive is weighed and added into the mixture A, the mixture is mixed to be uniform, and a compound agglomeration agent is obtained; C, the compound agglomeration agent in the step B is mixed with water, the mass ratio of the compound agglomeration agent to the water is 1:(2,000-10,000), and the agglomeration liquid is prepared .Agglomeration liquid mist drops on which fine particles are adsorbed are nucleated, collide and grow under the low pressure condition, large particle agglomerate is formed, agglomerated and grown fine particles are removed through a dust removal device, therefore, emissions of pollutants are restrained, and a brand-new emission reducing path is provided for emission reduction of the fine particles in the iron mine sintering process.

Description

technical field [0001] The invention relates to the technical field of pollutant emission reduction in the iron ore sintering process, in particular to a preparation method of an agglomeration liquid for suppressing the emission of fine particles 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 atmo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D51/02
CPCB01D51/02
Inventor 春铁军吴雪健狄瞻霞龙红明李家新王平孟庆民宁超钱立新李东升
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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