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Composite sulfur-fixing agent for coal combustion, composite sulfur-fixing coal-water slurry and sulfur-fixing method in furnace with burning

A composite, coal-water slurry technology, applied in the field of desulfurization, can solve the problems of low sulfur fixation efficiency, unsatisfactory ultra-low and ultra-clean emissions, and difficult utilization of desulfurization products, achieving low cost, low transportation costs, Ease of use

Active Publication Date: 2019-10-15
MONALISA GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the sulfur fixation efficiency of sulfur fixation technology in combustion is not high. Taking the representative dry desulfurization in the furnace as an example, the sulfur fixation rate can only reach 60%, and the improved NID dry desulfurization has the highest sulfur fixation rate. It can reach 80%, which cannot meet the requirements of ultra-low and ultra-clean emissions in industry
In addition, the amount of desulfurization product waste is relatively large, which is a kind of CaSO 4 1 / 2H 2 O and CaSO 3 1 / 2H 2 A mixture of O, where CaSO 3 1 / 2H 2 O accounts for a large proportion, which brings difficulties for the subsequent utilization of desulfurization products

Method used

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  • Composite sulfur-fixing agent for coal combustion, composite sulfur-fixing coal-water slurry and sulfur-fixing method in furnace with burning
  • Composite sulfur-fixing agent for coal combustion, composite sulfur-fixing coal-water slurry and sulfur-fixing method in furnace with burning
  • Composite sulfur-fixing agent for coal combustion, composite sulfur-fixing coal-water slurry and sulfur-fixing method in furnace with burning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Grinding limestone to prepare fine calcium carbonate: get calcium carbonate content 95%, particle diameter 1cm bulk limestone, drop in the dragon roller mill, grind 10min, measure the specific surface area of ​​the grinding product by Blaine's specific surface area meter, convert to Particle size (mm), so that the particle size is less than or equal to 5 microns, and the particle size changes with the grinding time as attached figure 1 .

[0053] (2) Mix fine calcium carbonate with coal water slurry according to different ratios of calcium and sulfur to make sulfur-fixing type coal water slurry: measure the total sulfur of coal water slurry according to the national standard GB / T214-2007 "Determination of total sulfur in coal" by Coulomb method content, the total sulfur content in this example is 0.5%, according to the calcium-sulfur molar ratio of 1.5:1, add the fine calcium carbonate prepared in Example 1 into the coal-water slurry, stir with a mixer at a speed of...

Embodiment 2

[0063] (1) Grinding limestone to prepare fine calcium carbonate: get calcium carbonate content 95%, particle diameter 1cm bulk limestone, drop in the dragon roller mill, grind 10min, measure the specific surface area of ​​the grinding product by Blaine's specific surface area meter, convert to Particle size (mm), such that the particle size is less than or equal to 5 microns.

[0064] (2) Mix fine calcium carbonate with coal water slurry according to different ratios of calcium and sulfur to make sulfur-fixing type coal water slurry: measure the total sulfur of coal water slurry according to the national standard GB / T214-2007 "Determination of total sulfur in coal" by Coulomb method content, the total sulfur content in this example is 0.5%, according to the calcium-sulfur molar ratio of 2.0:1, add the fine calcium carbonate prepared in Example 2 (1) into the coal-water slurry, stir with a mixer at a speed of 500 rpm for 10 minutes and mix uniform.

[0065] (3) Preparation of ...

Embodiment 3

[0074] (1) Grinding limestone to prepare fine calcium carbonate: get calcium carbonate content 95%, particle diameter 1cm bulk limestone, drop in the dragon roller mill, grind 10min, measure the specific surface area of ​​the grinding product by Blaine's specific surface area meter, convert to Particle size (mm), make the particle size less than or equal to 5 microns.

[0075] (2) Mix fine calcium carbonate with coal water slurry according to different ratios of calcium and sulfur to make sulfur-fixing type coal water slurry: measure the total sulfur of coal water slurry according to the national standard GB / T214-2007 "Determination of total sulfur in coal" by Coulomb method content, the total sulfur content in this example is 0.5%, according to the calcium-sulfur molar ratio of 1.5:1, add the fine calcium carbonate prepared in Example 3 (1) into the coal-water slurry, stir with a mixer at a speed of 500 rpm for 10 minutes and mix uniform.

[0076] (3) Preparation of fine sod...

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Abstract

The invention relates to a composite sulfur-fixing agent used for coal combustion as well as a composite sulfur-fixing coal water slurry and a method for simultaneously performing sintering and fixingsulfur in a furnace. The composite sulfur-fixing agent used for the coal combustion includes calcium carbonate and sodium carbonate, wherein the content of sodium carbonate is 1-2wt% of that of the calcium carbonate. When the above composite sulfur-fixing agent used for the coal combustion provided by the invention is adopted, a higher sulfur fixation rate can be realized.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a sulfur fixation process with burning in a furnace. Background technique [0002] Chinese SO 2 emissions are closely related to coal consumption, SO 2 90% of emissions come from burning coal. With the continuous growth of coal consumption, the amount of sulfur dioxide emitted by coal combustion is also increasing, resulting in increasingly serious acid rain and sulfur dioxide pollution in my country. Coal is a low-grade fossil energy, and in my country's energy structure system, the use of coal occupies a very high proportion. At the same time, my country is a country with a large amount of high-sulfur coal reserves. content are higher. The ash content of most coals is around 25% to 28%, and the sulfur content varies widely: ranging from 0.1% to 10%. With the increase of coal consumption, the SO 2 According to the analysis of the monitoring data of 2177 e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/12C10L1/32F23K1/02
Inventor 萧礼标张松竹黄玲艳麦荣坚
Owner MONALISA GRP CO LTD
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