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Method for reducing emission of ultrafine particles in fire coal based on organic intercalation modified kaolin

A technology of ultra-fine particles and fine particles, which is applied in the direction of chemical instruments and methods, fuels, silicon compounds, etc., can solve the problems of low efficiency and low removal efficiency of coal-fired fine particles, so as to reduce generation and emission and improve industry Application value, improvement of emission reduction effect

Inactive Publication Date: 2015-04-01
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

[0006] In view of the low efficiency of the currently used dust removal equipment for the removal of coal-fired fine particles and the low efficiency of the existing adsorbents for the removal of ultrafine particles, one of the purposes of the present invention is to provide a modified kaolin based on organic matter intercalation The coal-fired ultra-fine particle emission reduction method, which uses organic matter intercalation modified kaolin as an effective method to reduce the generation of ultra-fine particles in the coal combustion process

Method used

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  • Method for reducing emission of ultrafine particles in fire coal based on organic intercalation modified kaolin
  • Method for reducing emission of ultrafine particles in fire coal based on organic intercalation modified kaolin
  • Method for reducing emission of ultrafine particles in fire coal based on organic intercalation modified kaolin

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Embodiment 1

[0033] Take 100kg of formamide intercalation modified kaolin as coal combustion additive.

[0034] According to the proportion of 5% of the mass of the pulverized coal base, the prepared intercalated modified kaolin is fully mixed with the pulverized coal (with a particle size range of 45-100 μm).

[0035] The coal powder mixed with intercalated modified kaolin was burned in a settling furnace respectively. The experimental temperature was 1500°C and the powder feeding rate was 0.15g / min. Separation and removal of particles with an aerodynamic diameter above 10 μm, and then collected by a low-pressure impactor (DLPI) with 13-stage particle size separation function.

[0036] The low-pressure impactor (DLPI) collects particles with an aerodynamic diameter less than 10 μm, and the particle sizes of 13 grades are: 0.0281 μm, 0.0565 μm, 0.0944 μm, 0.154 μm, 0.258 μm, 0.377 μm, 0.605 μm, 0.936 μm, 1.58 μm , 2.36 μm, 3.95 μm, 6.6 μm, 9.8 μm, and then weigh the collected particles wi...

Embodiment 2

[0038] Take acetamide intercalation modified kaolin 100kg as coal combustion additive.

[0039] According to the proportion of 5% of the mass of the pulverized coal base, the prepared intercalated modified kaolin is fully mixed with the pulverized coal (with a particle size range of 45-100 μm).

[0040] The coal powder mixed with intercalated modified kaolin was burned in a settling furnace respectively. The experimental temperature was 1500°C and the powder feeding rate was 0.15g / min. Separation and removal of particles with an aerodynamic diameter above 10 μm, and then collected by a low-pressure impactor (DLPI) with 13-stage particle size separation function.

[0041] The low-pressure impactor (DLPI) collects particles with an aerodynamic diameter less than 10 μm, and the particle sizes of 13 grades are: 0.0281 μm, 0.0565 μm, 0.0944 μm, 0.154 μm, 0.258 μm, 0.377 μm, 0.605 μm, 0.936 μm, 1.58 μm , 2.36 μm, 3.95 μm, 6.6 μm, 9.8 μm, and then weigh the collected particles with ...

Embodiment 3

[0043] Take 60kg of formamide intercalation modified kaolin and 40kg of acetamide intercalation modified kaolin to form the coal combustion additive.

[0044] The prepared intercalated modified kaolin and coal powder (particle size range 45-100 μm) were fully mixed according to the proportion of 3% of the mass of the pulverized coal base.

[0045] The coal powder mixed with intercalated modified kaolin was burned in a settling furnace respectively. The experimental temperature was 1500°C and the powder feeding rate was 0.15g / min. Separation and removal of particles with an aerodynamic diameter above 10 μm, and then collected by a low-pressure impactor (DLPI) with 13-stage particle size separation function.

[0046] The low-pressure impactor (DLPI) collects particles with an aerodynamic diameter less than 10 μm, and the particle sizes of 13 grades are: 0.0281 μm, 0.0565 μm, 0.0944 μm, 0.154 μm, 0.258 μm, 0.377 μm, 0.605 μm, 0.936 μm, 1.58 μm , 2.36 μm, 3.95 μm, 6.6 μm, 9.8 μm,...

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Abstract

The invention discloses a method for reducing the emission of ultrafine particles in fire coal based on organic intercalation modified kaolin. The method comprises the following steps of adding a fire coal additive composed of modified kaolin in the fire coal and uniformly mixing, feeding the fire coal mixed with the composite additive into a combustion furnace for combusting, wherein the fire coal additive can prevent the generation of the ultrafine particles or adsorbs the ultrafine particles so as to form large-particle-diameter particles capable of being captured by virtue of a dust remover when the fire coal is combusted, and is one or a mixture of two of formamide intercalation modified kaolin and acetamide intercalation modified kaolin. By the method, the formation of ultra-fine mode particles can be prevented or the ultrafine particles are transformed towards fine particles, and thus the purposes that the generation and emission of the ultrafine particles are reduced are achieved.

Description

technical field [0001] The invention relates to a method for removing and reducing emissions of coal-burning ultrafine particles, in particular to a method for reducing emissions of coal-burning ultrafine particles based on organic matter intercalation modified kaolin. Background technique [0002] In recent years, the atmospheric smog phenomenon in China has become more and more serious. The smog phenomenon in many cities and the long-term severe smog occurred in central and eastern China, which has attracted the attention of all walks of life. Smog has gradually become a hot topic among people after dinner. " The term "smog" was also selected as one of China's top ten health communication hot topics in 2013, ranking second, second only to "genetically modified". The "Green Paper on Climate Change: Report on Climate Change (2013)" jointly issued by the Chinese Academy of Social Sciences and the China Meteorological Administration pointed out that in the past 50 years, China...

Claims

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Application Information

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IPC IPC(8): C10L9/10B01J20/22C01B33/44
Inventor 盘思伟李丽张凯刘小伟孙伟
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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