Boiler coal combustion-improving desulfurizing and denitrifying agent composition and preparation method thereof

Abstract

The invention provides a boiler coal combustion-improving desulfurizing and denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-7 parts of sodium carbonate, 1-3 parts of alumina, 2-8 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 2-6 parts of ferric oxide, 3-10 parts of potassium permanganate, 3-10 parts of potassium chlorate, 10-35 parts of activated attapulgite clay, 15-30 parts of urea, 2-4 parts of ammonium formate, 2-4 parts of ammonium chloride, 6-23 parts of ammonium acetate, 3-9 parts of manganese oxide, 9-12 parts of copper chloride, 1-3 parts of copper oxide, 2-4 parts of zinc sulfate, 1-3 parts of zinc nitrate, 7-18 parts of potassium dichromate, 1.0-1.5 parts of titanium dioxide, 0.5-1.0 part of barium molybdate, 0.5-1.5 parts of cobalt sulfate, 0.5-1.5 parts of vanadium pentoxide, 0.3-0.7 part of cerium oxide, 0.1-0.2 part of sodium dodecyl benzene sulfonate and 0.1-0.2 part of alkyl glyceryl ether. The composition is convenient to use, has stable properties, plays roles of combustion improving, desulfurization and denitrification, has coal saving rate of 8-25% and can remove fixed sulfur by 50-70%.

Description

technical field [0001] The invention relates to an additive product suitable for use in coal-fired boilers in industries such as petroleum, chemical industry, electric power, thermoelectricity and metallurgy, in particular to a boiler coal-fired combustion-supporting desulfurization and denitrification agent composition. The invention also relates to boiler coal-fired combustion-supporting A preparation method of a desulfurization and denitration agent composition. Background technique [0002] my country's air pollution is serious. According to data estimates, the main air pollutants emitted by coal combustion, such as soot, SO 2 , NOx, CO 2 etc., the total amount accounts for about 96% of the total fuel combustion emissions. Among them, the S0 emitted by coal combustion 2 Accounting for 87% of the total emissions of various pollution sources, followed by NOx accounted for 6% of the total emissions of various pollution sources. SO 2 NOx and NOx are the main causes of a...

AI Technical Summary

Problems solved by technology

[0005] This kind of calcium-based, magnesium-based, barium-based sulfur-fixing and denitrification agent, its sulfur-fixing and denitrification reaction is in SO 2 , SO 3 There is a chemical reaction between NOx and metal oxides to generate sulfate and nitrate to achieve sulfur fixation and denitrification. Will produce secondary pollution; NaCO 3 , NaOH and other composite sulfur-fixing and denitrifying agent products, the NaSO generated during the combustion process of the boiler during sulfur fixation and denitrification 4 、NaNO 3 It is easily soluble in water and should not be used; for example, barium sulfate and barium nitrate will decompose sulfur and nitrogen oxides at 450-500 ° C, causing secondary pollution

The advantage of this kind of sulfur fixation and denitrification agent is that the production raw materials are easy to obtain, and the production cost is low; the disadvantage is that the addition amount is large, generally about 1.5%, the addition cost is high, and the sulfur fixation and denitrification effect is low, generally 30% sulfur fixation About 10% denitrification