Superfine fire coal particle control method based on pillared modified montmorillonite

A technology of ultra-fine particles and control methods, which is applied in the direction of fuel, solid fuel, petroleum industry, etc., and can solve problems such as human health and ecological environment hazards, ultra-fine particle emissions, etc., to achieve cheap prices, improved emission reduction effects, and technological processes Simple and convenient effect

Inactive Publication Date: 2016-01-06
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research shows that the removal efficiency of kaolin, which has the best removal effect on ultrafine particles, is about 30%, and there will still be a large amount of ultrafine particles discharged into the environment, causing great harm to human health and the ecological environment.

Method used

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  • Superfine fire coal particle control method based on pillared modified montmorillonite
  • Superfine fire coal particle control method based on pillared modified montmorillonite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Preparation of hydroxyaluminum modified montmorillonite:

[0042] 1) Hydrolyze the aluminum chloride solution to obtain the hydroxyaluminum pillar solution, add 960mL0.3mol / LNaOH solution dropwise to 300mL0.4mol / LAlCl 3 The solution was mechanically stirred for 2 hours after the dropwise addition was completed. In order to avoid the precipitation of aluminum hydroxide, the dropwise addition process was carried out slowly. Get the OH of the hydroxyaluminum pillar liquid - / A +3 2.4, aged for three days at room temperature;

[0043] 2) Put the montmorillonite in an oven at 45°C for 3 hours to remove the adsorbed water;

[0044] 3) Take 20g of montmorillonite, add it into the aged hydroxyaluminum pillaring solution, stir it mechanically for 2 hours, and perform several times of centrifugation and washing after the reaction to obtain hydroxyaluminum modified montmorillonite powder;

[0045] 4) The hydroxyaluminum-modified montmorillonite was dried at 45°C, then crushed...

Embodiment 2

[0051] Preparation of dry method sodium dodecylsulfonate (SDS) modified montmorillonite:

[0052] 1) Put the montmorillonite in an oven at 45°C for 3 hours to remove the adsorbed water;

[0053] 2) Add 4 g of sodium dodecylsulfonate (SDS) to 24 g of montmorillonite, mix well, and place in a muffle furnace for calcination at 250° C. for 30 min. After the calcination is completed, cool to room temperature in air;

[0054] 3) Sodium dodecylsulfonate (SDS) modified montmorillonite was dried at 45°C, then pulverized and ground, and sodium dodecylsulfonate (SDS) within the particle size range of 45μm-90μm was collected with a sieve. ) modified montmorillonite powder.

[0055] Sampling preparation: take 1000g of Shanxi anthracite, particle size range 45μm-90μm; take 30g dry-process sodium dodecylsulfonate (SDS) modified montmorillonite powder, particle size range 45μm-90μm 。

[0056] The coal powder and the dry-process sodium dodecylsulfonate (SDS) modified montmorillonite powder...

Embodiment 3

[0061] The difference with embodiment 2 is:

[0062] Preparation of dry method sodium dodecylsulfonate (SDS) modified montmorillonite:

[0063] 1) Put the montmorillonite in an oven at 45°C for 3 hours to remove the adsorbed water;

[0064] 2) Add 4 g of sodium dodecylsulfonate (SDS) to 20 g of montmorillonite, mix well, and place in a muffle furnace for calcination at 250° C. for 35.5 min. After the calcination is completed, cool to room temperature in air;

[0065] 3) Dry the sodium dodecylsulfonate (SDS) modified montmorillonite at 45°C, then pulverize and grind, and collect sodium dodecylsulfonate ( SDS) modified montmorillonite powder.

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Abstract

The invention discloses a superfine fire coal particle control method based on pillared modified montmorillonite. The superfine fire coal particle control method comprises the steps of adding a modified montmorillonite additive into pulverized coal; after uniformly mixing, combusting the pulverized coal mixed with the modified montmorillonite additive in a boiler; and inhibiting the generation of the superfine particles and adsorbing the generated superfine particles through the physical and chemical effects of the modified montmorillonite additive, and enabling the superfine particles to transfer towards particles with large particle sizes to form large particles which can be captured by a dust collecting device. The modified montmorillonite is added to remove the superfine particles, so that the rate for capturing the superfine particles by the original montmorillonite can be remarkably increased, and the discharge of the superfine particles can be effectively reduced.

Description

technical field [0001] The invention belongs to the field of coal combustion pollutant control, and in particular relates to a method for controlling superfine particles of coal combustion based on pillar-supported modified montmorillonite. technical background [0002] Coal is currently the most important primary energy in my country, accounting for more than 60% of the total primary energy. With the development and utilization of new energy, this proportion will decrease. However, due to my country's energy structure and resource distribution, the dominant position of coal in primary energy will not change for a long time in the future. The application of coal in my country is mainly used for power generation and chemical industry, among which coal-fired power generation is the most common. During the combustion of coal, many pollutants are produced, such as SO x , NO x , CO 2 At the same time, it will cause the greenhouse effect, form acid rain to destroy buildings an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10
Inventor 盘思伟张凯刘小伟张宇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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