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

Abstract

The invention relates to an additive product suitable for coal-fired boilers in the petroleum, chemical and power industries and provides a boiler coal combustion-improving denitrifying agent composition. The composition comprises the following raw materials in parts by weight: 2-8 parts of sodium carbonate, 3-7 parts of aluminium hydroxide, 2-5 parts of ferric trichloride, 6-15 parts of urea, 4-10 parts of ammonium carbonate, 4-10 parts of ammonium chloride, 3-9 parts of ferric oxide, 7-22 parts of potassium permanganate, 7-22 parts of potassium chlorate, 15-40 parts of activated attapulgite clay, 4-8 parts of chromium sesquioxide, 2-6 parts of manganese oxide, 4-8 parts of zinc oxide, 4-8 parts of copper chloride, 2-6 parts of copper oxide, 2-6 parts of copper carbonate, 3-7 parts of zinc sulfate, 2-5 parts of zinc nitrate, 0.5-1.5 parts of barium molybdate, 1-2 parts of titanium oxide, 0.5-1.5 parts of vanadium pentoxide, 0.2-0.5 part of copper sulfate, 0.2-0.5 part of cerium oxide, 1-3 parts of penetrating agent JFC and 0.1-0.2 part of lignosulphonate. The composition is efficient in combustion improving, has high coal saving rate and prolongs the service lives of the boilers.

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 denitrification agent composition, and the invention also relates to boiler coal-fired combustion-supporting denitrification A method for the preparation of the composition. Background technique [0002] With the rapid development of the economy, the sulfur dioxide (SO2) emitted by coal burning in my country 2 ) and nitrogen oxides (NOx) increased sharply. Sulfur dioxide and nitrogen oxides are the main substances of air pollution. According to statistics, my country's annual NOx, SO 2 The emissions are about 7.7 million tons and 24 million tons respectively, while NOx, SO 2 It is one of the main reasons for the formation of "acid rain" and "acid fog". Nitrogen oxides combine with hydrocarbons to form photoch...

AI Technical Summary

Problems solved by technology

Commonly used sulfur-fixing denitrification agents are mainly calcium-based sulfur-fixing denitrification agents. The disadvantages are that the utilization rate of sulfur-fixing denitrification agents is low, the reaction rate of sulfur-fixing denitrification is inconsistent with the rate of sulfur precipitation, and the formation of sulfur-fixing denitrification products at high temperatures Re-decomposition

The addition amount is generally about 1.5%. If the addition amount is large, the utilization rate of alkaline substances in sulfur fixation and denitrification is low. On the contrary, the cost of desulfurization and denitrification is too high, and the sulfate and nitrate generated by the reaction of alkaline substances are easy to decompose, resulting in sulfur fixation. The denitrification efficiency is not high

[0005] However, the development of most coal-fired high-temperature sulfur fixation agents and additives is still in the experimental research and semi-industrial tests, because the understanding of the promotion mechanism of sulfur fixation and denitrification of additives is not deep enough.

[0006] Coal-fired sulfur fixation and denitrification technology is a suitable solution for reducing SO emissions in my country. 2 Ordinary calcium-based sulfur fixation and denitrification agent is cheap and easy to get, but its sulfur fixation rate is low, the high temperature sulfur fixation rate is only 20% to 30%, and the denitrification rate is only about 30%.