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A composite agglomerating agent for emission reduction of fine particulate matter in flue gas from iron ore sintering agglomeration

A fine particle and agglomerating agent technology, which is applied in the field of pollutant emission reduction in the iron ore sintering process, can solve the problems of limited emission reduction effect, complex composition, and limited emission reduction effect of fine particles

Active Publication Date: 2018-12-04
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 composite agglomerating agent for emission reduction of fine particulate matter in flue gas from iron ore sintering agglomeration
  • A composite agglomerating agent for emission reduction of fine particulate matter in flue gas from iron ore sintering agglomeration
  • A composite agglomerating agent for emission reduction of fine particulate matter in flue gas from iron ore sintering agglomeration

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Embodiment 1

[0052] combine Figure 4 with Figure 5 As shown, a composite agglomerating agent for emission reduction of fine particles of flue gas from iron ore sintering agglomeration in this embodiment: a composite agglomerating agent for emission reduction of fine particles of flue gas, each component is composed according to the following mass: polyaluminum chloride 10g, carboxymethyl Sodium cellulose 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.

[0053] The preparation method of the present embodiment reunion liquid is:

[0054] (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 solid particle polyaluminum chloride, 3...

Embodiment 2

[0101] 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.

[0102] 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

[0104] 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.

[0105] 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 composite agglomeration agent for reducing emission of fine particles in flue gas from iron-ore sintering and agglomeration and belongs to the technical field of emission reduction of pollutants in the process of iron-ore sintering. The composite agglomeration agent comprises the following components in parts by mass: 0-20 parts of polymeric aluminium chloride, 20-40 parts of sodium carboxymethyl cellulose, 20-40 parts of polyacrylamide and 2-5 parts of an additive. Agglomeration liquid is sprayed into a flue-gas channel of sintering flue gas, fine particles in the sintering flue gas are agglomerated to be larger under the action of the agglomeration liquid, and a dust-removing device is adopted to remove the fine particles agglomerated to be larger. The composite agglomeration agent disclosed by the invention has the advantages that agglomeration liquid droplets adsorbing the fine particles are nucleated and collide with each other and grow to form large-particle agglomerates under the condition of low pressure, and the dust-removing device is adopted to remove the fine particles agglomerated to be larger, so that an all-new emission reducing path is provided for reducing the emission of the fine particles in the process of iron-ore sintering.

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 composite agglomerating agent for emission reduction of fine particles of flue gas from iron ore sintering agglomeration. 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...

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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