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

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...

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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

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