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Fly ash calcium based flue gas desulfurizer and method for manufacturing same

A manufacturing method and technology of fly ash, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve the problems of low utilization rate and large amount of desulfurizer, and achieve low production costs, reduced operating costs, and large The effect of specific surface area

Inactive Publication Date: 2009-10-21
UNIVERSTAR SCI & TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large amount of desulfurization agent and low utilization rate when traditional flue gas desulfurizers are used for desulfurization operations, the purpose of the present invention is to provide a fly ash calcium-based flue gas desulfurizer and its manufacturing method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preferred embodiment one, a kind of manufacture method of fly ash calcium-based flue gas desulfurizer, specifically comprises steps:

[0043] (1), weigh 60 parts of fly ash, Ca(OH) 2 15 parts, CaSO 4 2H 2 O 25 parts, pulverized and mixed evenly;

[0044] where CaSO 4 2H 2 O is an activator, which can also be replaced by magnesium sulfate, sodium sulfate, calcium sulfite, etc.

[0045] (2), weigh 1350 parts of deionized water, after heating to 90°C, add it into the above-mentioned mixed material to form a reactant slurry;

[0046] Here deionized water is H without other anions and cations 2 O, heat the deionized water to 90°C, and add it to the above mixed homogeneous material.

[0047](3), keep the temperature of the reactant slurry at about 90°C, and stir continuously at 400rpm for 12 hours;

[0048] Stir well here to make the fly ash and Ca(OH) in the solution 2 Carry out a complete hydrothermal reaction.

[0049] (4), slurry is carried out suction filtratio...

Embodiment 2

[0053] Preferred embodiment two, a kind of manufacture method of fly ash calcium-based flue gas desulfurizer, specifically comprises steps:

[0054] (1), weigh 40 parts of fly ash, Ca(OH) 2 16 parts, CaSO 4 2H 2 O 20 parts, pulverized and mixed evenly;

[0055] where CaSO 4 2H 2 O is the activator, and can also be replaced by magnesium sulfate, sodium sulfate, calcium sulfite, etc., and CaSO is preferred here 4 2H 2 O.

[0056] (2), weigh 800 parts of deionized water, after heating to 80°C, add it into the above-mentioned mixed material to form a reactant slurry;

[0057] Here deionized water is H without other anions and cations 2 O, heat the deionized water to 80°C, and add it to the above mixed homogeneous material.

[0058] (3), keep the temperature of the reactant slurry at about 80°C, and stir continuously at 300rpm for 7 hours; stir fully here to make the fly ash and Ca(OH) in the solution 2 Carry out a complete hydrothermal reaction.

[0059] (4), slurry is ...

Embodiment 3

[0063] Preferred embodiment three, a kind of manufacture method of fly ash calcium-based flue gas desulfurizer, specifically comprises steps:

[0064] (1), weigh 70 parts of fly ash, Ca(OH) 2 22 parts, 30 parts of NaOH, pulverized and mixed evenly;

[0065] Wherein NaOH is the activator here, and it can also be replaced by other alkalis such as magnesium hydroxide.

[0066] (2) Weigh 1500 parts of deionized water and add 3 parts of sucrose to mix evenly, after heating to 60°C, add the above mixed material to form a reactant slurry;

[0067] Here, 3 parts of sucrose are fully dissolved in 1500 parts of deionized water, and then heated to 60°C, and the heated solution is added to the above mixed material.

[0068] (3), keep the temperature of the reactant slurry at about 60°C, and stir continuously at 400rpm for 15 hours; make the fly ash and Ca(OH) in the solution 2 Carry out a complete hydrothermal reaction.

[0069] (4), slurry is carried out suction filtration, and the f...

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Abstract

The invention discloses a fly ash calcium based flue gas desulfurizer and a method for manufacturing the same, the method comprising the following steps: grinding the components including 40-70 weight parts of fly ash, 15-30 weight parts of Ca(OH)2 or CaO with a purity of above 85 percent, 10-30 weight parts of excitant and 0-5 parts of sucrose, mixing the above components evenly, heating 1000-1500 weight parts of deionized water to a temperature of 60-90 DEG C, and adding the deionized water into the mixture; keeping the hydrothermal temperature constant, and stirring continuously the mixture for 8-15 hours at 200-400 rpm for hydrothermal combination reaction; performing suction filtration to serosity, placing the filtered and washed serosity in a constant-temperature drying box; drying the serosity to constant weight, taking out filter mass and cooling the filter mass to normal temperature; pressing the filer mass slightly into powder, and screening the power with a standard sieve of 40 mu and sealing the power. Compared with the prior art, the invention has stronger reaction and absorption performance to SO2, can reduce the operational cost of a desulfurization system and improves the use ratio of desulfurizer.

Description

Technical field: [0001] The invention relates to a desulfurizer, in particular to a fly ash calcium-based flue gas desulfurizer and a manufacturing method thereof. Background technique: [0002] As we all know, sulfur dioxide, nitrogen oxides and smoke dust produced during coal combustion are the most important pollutants in the atmosphere. It has become a worldwide environmental pollution problem. And my country's acid rain area has reached more than 40% of the country's land area, bringing great harm to people's lives. However, the emission of sulfur dioxide in my country mainly comes from coal combustion. How to reduce the emission of sulfur dioxide in the process of coal combustion is one of the urgent problems to be solved in our country. [0003] Flue gas desulfurization is currently the only large-scale commercial application of desulfurization technology in the world, and it is also the most efficient technical means for controlling sulfur dioxide and acid rain pol...

Claims

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Application Information

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IPC IPC(8): B01D53/50B01D53/81
Inventor 吴迅海王韶锋郑君国刘现卓
Owner UNIVERSTAR SCI & TECH SHENZHEN
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