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Preparation method of modified carbide slag, product of preparation method and application of modified carbide slag
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A modified technology of calcium carbide slag, applied in the field of flue gas desulfurization and denitrification, to achieve the effect of solving moisture absorption and compaction, broadening the prospect of popularization and utilization, and reducing storage and transportation costs
Active Publication Date: 2021-12-03
KUNMING UNIV OF SCI & TECH
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[0005] Carbide slag and amino reducing agent are relatively cheap raw materials. There is no record in the field of the technology of compounding calcium carbide slag and amino reducing agent to prepare desulfurization and denitrification agent. If the two substances can be successfully compounded and some problems existing between carbide slag and amino reducing agent can be solved, it will greatly promote the application of carbide slag in desulfurization and denitrification agents
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Embodiment 1
[0034] The preparation steps of modified carbide slag:
[0035] (1) Take carbide slag raw material, add 20 times of water, ultrasonic 10min, filter, filter residue is dried at 105 ℃, pulverize, pass through 100 mesh sieve, obtain carbide slag powder;
[0036] (2) Take 7.0 g of carbide slag powder prepared in step (1), add 0.9 g of sodiumstearate and 50 mL of distilled water, heat to 90° C., and react for 30 min at a stirring speed of 300 rpm;
[0037] (3) Add 2.1 g of urea to the mixed solution after the reaction in step (2), continue stirring for 1 min after the urea is completely dissolved, evaporate the water in the reaction solution to dryness, and obtain modified carbide slag.
Embodiment 2
[0039] The preparation steps of modified carbide slag:
[0040] (1) Take carbide slag raw material, add 20 times of water, ultrasonic 10min, filter, filter residue is dried at 105 ℃, pulverize, pass through 100 mesh sieve, obtain carbide slag powder;
[0041] (2) Take 6.0 g of carbide slag powder prepared in step (1), add 1.0 g of potassiumstearate and 50 mL of distilled water, heat to 85° C., and react for 35 min at a stirring speed of 300 rpm;
[0042] (3) Add 3 g of urea to the mixed solution after the reaction in step (2), continue stirring for 1 min after the urea is completely dissolved, evaporate the water in the reaction solution to dryness, and obtain modified calcium carbide slag.
Embodiment 3
[0044] The preparation steps of modified carbide slag:
[0045] (1) Take carbide slag raw material, add 20 times of water, ultrasonic 10min, filter, filter residue is dried at 105 ℃, pulverize, pass through 200 mesh sieve, obtain carbide slag powder;
[0046](2) Take 7.2 g of carbide slag powder prepared in step (1), add 0.8 g of sodium palmitate and 50 mL of distilled water, heat to 80 ° C, and react for 40 min at a stirring speed of 300 rpm;
[0047] (3) Add 2.0 g of urea to the mixed solution after the reaction in step (2), continue stirring for 1 min after the urea is completely dissolved, and evaporate the water in the reaction solution to dryness to obtain modified carbide slag.
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Abstract
The invention discloses a preparation method of modified carbideslag, a product of the preparation method and application of the modified carbideslag, belonging to the technical field of desulfurization and denitrification of flue gas. The preparation method of the modified carbideslag comprises the following steps: (1) mixing carbide slag, fatty acid salt and water, and conducting reacting under a heating condition; and (2) adding an amino reducing agent, and removing water in reaction liquid after the amino reducing agent is dissolved to prepare the modified carbide slag. The preparation method provided by the invention is extremely simple, the used raw materials are relatively cheap, requirements on reaction conditions and equipment are not high, the problem of moisture absorption of the carbide slag and the amino reducing agent is solved, the effect of the modified carbide slag on flue gas desulfurization and denitrification is very remarkable, and the method is worthy of wide popularization and utilization.
Description
technical field [0001] The invention relates to the technical field of flue gas desulfurization and denitrification, in particular to a preparation method of modified carbide slag and its product and application. Background technique [0002] During the combustion of coal, a large amount of SO is produced 2 and NO x , they are the two main pollutants in the atmosphere, which affect the growth of animals and plants and human health, and can also cause acid rain and other disastrous weather to cause environmental damage. However, coal, as one of the main energy sources in the world, cannot use other energy sources to replace coal in a short period of time. Therefore, a large amount of SO will be produced during the combustion of coal 2 and NO x It is very necessary to desulfurize and denitrify the flue gas. [0003] Carbide slag is an industrial waste produced during the reaction of calcium carbide and water to form acetylene gas. The main component of carbide slag is Ca...
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