Combustion-supporting type fuel coal additive and method for preparing same

Active Publication Date: 2013-04-10
广西信发铝电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] 1) Halides are easy to cause corrosion to coal-fired equipment, especially the chloride ions in the halide additives are easy to form HC in the coal-fired atmosphere 1 Gas, causing corrosion to boiler water wall, superheater and reheater pipes
[0016] 2) The high cost of rare earth oxides is not suitable for large quantities of coal-fired equipment
[0017] 3) Metal powder poses a safety hazard
Metal powder has strong activity, is flammable and explosive, and poses a threat to personal and equipment safety
[0018] 4) Carbonate such as Na 2 CO 3 、K 2 CO 3 Decomposes at high temperatures to produce the greenhouse gas CO 2 , increasing the pollution of the environment

Method used

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  • Combustion-supporting type fuel coal additive and method for preparing same
  • Combustion-supporting type fuel coal additive and method for preparing same
  • Combustion-supporting type fuel coal additive and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The composition and weight ratio of the combustion-supporting coal-fired additive described in this embodiment are shown in the following table:

[0041]

[0042] The Fe 2 o 3 can be replaced by Fe 3 o 4 , the CuO can be replaced by Cu(NO 3 ) 2 , the KNO 3 Can be replaced by NaNO 3 , Ca(NO 3 ) 2 , Ba(NO 3 ) 2 .

preparation Embodiment 1

[0043] A method for preparing the combustion-supporting coal-fired additive described in Example 1, comprising the following steps:

[0044] A, drying each component of the combustion-supporting type coal-fired additive in a temperature environment of 60 degrees for 4 hours;

[0045] B. After mixing alkali metal oxides, alkaline earth metal oxides and transition metal oxides, grind them to particle size d 90 <75μm;

[0046] C. Stir the salt-based oxidant and the active catalyst of the metal oxide with the substances in the above step B until they are evenly mixed.

Embodiment 2

[0048] The composition and weight ratio of the combustion-supporting coal-fired additive described in this embodiment are shown in the following table:

[0049]

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PUM

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Abstract

The invention belongs to the field of catalytical combustion supporting, and particularly relates to a combustion-supporting type fuel coal additive and a method for preparing the same. The combustion-supporting type fuel coal additive comprises the following components in mass percent: 53%-68% of mixture of alkali metal oxide, alkaline earth metal oxide and transition metal oxide, 30%-40% of salt oxidant and the balance of metallic oxide active catalyst. Compared with the fuel coal additive in the prior art, the combustion-supporting type fuel coal additive has the advantages of good combustion supporting effect, resource saving, small corrosion in fuel coal equipment, low cost, safety and environmental friendliness.

Description

technical field [0001] The invention belongs to the field of catalytic combustion, and in particular relates to a combustion-supporting coal-fired additive and a preparation method thereof. Background technique [0002] Coal-burning additives (also known as coal-saving additives, coal-saving synergists) are chemical agents added to coal, consisting of one or more substances, generally solid powder or liquid. Coal-fired additives are used in various coal-fired equipment such as power boilers, industrial boilers, briquette equipment, etc. The main functions are: [0003] 1) Promote the complete combustion of coal and increase the burning rate of coal; [0004] 2) Reduce SO in the process of coal combustion 2 generate concentration; [0005] 3) Reduce NO in the process of coal combustion x generate concentration; [0006] 4) Remove or inhibit the ash and coking produced by coal combustion. [0007] At present, combustion-supporting coal-fired additives generally use the f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L9/12
Inventor 彭飞李启云
Owner 广西信发铝电有限公司
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