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A kind of coal combustion additive and its application method

A coal-fired additive and additive technology, which is applied in the field of coal-fired additives, can solve problems such as poor treatment effect, high cost, and complicated control process, and achieve the effects of less corrosion, less environmental pollution, and improved reaction efficiency

Active Publication Date: 2015-08-26
神木市远兴炜业发电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process, different additives are often added at different stages, or the gas is purified after the gas is discharged. The control process is complicated, and the treatment effect is poor and the cost is high.

Method used

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  • A kind of coal combustion additive and its application method
  • A kind of coal combustion additive and its application method
  • A kind of coal combustion additive and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Composition and weight percent of coal-fired additive are (total weight is 1000g):

[0037]

[0038] The steps of using the coal-fired additive are as follows:

[0039] a. Mix the above-mentioned coal-fired additives in proportion, stir, and heat to 50°C;

[0040] b. The cooled coal-fired additive mixture is injected into the furnace by compressed air, and the pressure of the compressed air is 0.5MPa.

[0041] The amount of coal-burning additive injected per second is adjusted according to the total usage. The coal-burning additive solution is heated so that the composition is completely dissolved, and the compounds of the additive used do not decompose in this case.

[0042]Coal-fired additives are injected into the furnace by compressed air. The additives have good dispersion, which makes the additives and coal powder mix more uniformly, increases the contact area between additives and coal powders, and makes the additives more effective.

[0043] After testing,...

Embodiment 2

[0045] Composition and weight percent of coal-fired additive are (total weight is 1000g):

[0046]

[0047] The steps of using the coal-fired additive are as follows:

[0048] a. Mix the above-mentioned coal-fired additives in proportion, stir, and heat to 40°C;

[0049] b. The cooled coal-fired additive mixture is injected into the furnace by compressed air, and the pressure of the compressed air is 0.6MPa.

[0050] Preferably, the injection mode of the coal-burning additive is intermittent, each interval time is 5-10 minutes, and each injection time is 20-30s. Due to the small amount of coal-fired additives, the intermittent injection method can better control the addition process of additives, thereby saving the amount of additives and compressed air used, and at the same time, ensuring the uniform mixing of additives and coal powder.

[0051] Preferably, the injection point of the coal-burning additive is set at the fire sight hole of the coal-burning equipment. In t...

Embodiment 3

[0054] Composition and weight percent of coal-fired additive are (total weight is 1000g):

[0055]

[0056] The steps of using the coal-fired additive are as follows:

[0057] a. Mix the above-mentioned coal-fired additives in proportion, stir, and heat to 60°C;

[0058] b. The cooled coal-fired additive mixture is injected into the furnace by compressed air, and the pressure of the compressed air is 0.7MPa.

[0059] Preferably, the injection mode of the coal-burning additive is intermittent, each intermittent time is 2-5 minutes, and each injection time is 10-20s.

[0060] Preferably, the injection point of the coal-fired additive is set at the fire sight hole of the coal-burning equipment, which has high safety performance.

[0061] After testing, the use of the above-mentioned coal-fired additives has a good combustion-supporting effect and high coal combustion efficiency. When used on coal-fired equipment with an efficiency of 65-80%, it can save about 8% of coal; Th...

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Abstract

The invention discloses a fire coal additive and a using method thereof. The fire coal additive comprises the ingredients by weight percent: 3-9% of an oxidant, 34-67% of an alkali metal salt material, an alkaline-earth metal salt material, and a transition metal salt material, 0.5-2.5% of NaVO3, 3.5-6.5% of Al(NO3)3, and the balance of H2O, wherein the alkali metal salt material, the alkaline-earth metal salt material, and the transition metal salt material are nitrate or carbonate or chlorate. The fire coal additive provided by the invention has the functions of supporting combustion, fixing sulfur, denitrifying, decoking and the like at the same time; the coal saving rate achieves 2-10%; the sulfur fixing efficiency is over 40%; and the denitrifying efficiency is over 20-30%.

Description

technical field [0001] The invention relates to the technical field of coal combustion, in particular to a coal combustion additive and its application method. Background technique [0002] Coal combustion additive is a chemical agent added to coal, generally solid powder or liquid. Coal-fired additives are used in various coal-fired equipment such as power boilers, industrial boilers, coal-shaped equipment, etc. The main functions are: to promote the complete combustion of coal, improve the burn-out rate of coal; reduce SO in the process of coal combustion 2 Formation concentration; reduction of NO in coal combustion process X Generate concentration; remove or inhibit the ash and coking produced by coal combustion. [0003] At present, some coal-fired additives have the functions of combustion-supporting and sulfur-fixing at the same time, but for reducing the production of NO in the process of coal combustion X There is no additive that can simultaneously satisfy the fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/10
Inventor 彭飞李启云
Owner 神木市远兴炜业发电有限公司
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