Fire coal combustion improver

Abstract

The invention relates to an improvement of a fire coal combustion improver. The improved fire coal combustion improver is characterized by being prepared by compounding and mixing the following components: 20 to 30 weight percent of dolomite powder, 5 to 15 weight percent of dicyclopentadieny iron, 3 to 10 weight percent of chromium trioxide, 3 to 10 weight percent of manganese dioxide, 3 to 15 weight percent of magnesium nitrate, 3 to 15 weight percent of sodium dichromate and/or potassium dichromate, 3 to 18 weight percent of zinc oxide, 15 to 30 weight percent of active clay. The fire coal combustion improver has a plurality of functions of combustion acceleration, sulfur solidification, smoke abatement and the like; the thermal efficiency of a boiler can be improved by 3 to 8 percent; the coal-saving efficiency is up to 5 to 15 percent; the Ringelmann smoke blackness is less than 1; the total removal rate of SO2, NOx and the like is 25 to 60 percent, and the combustion improver has remarkable coal-saving and environmental-protection effect. Since the combustion effect is improved, the inferior coal (such as coal gangue), which is difficult to combust normally, is combusted and comes into play. After the long use, the boiler is not corroded, the scaling of the calcium sulfate in the boiler can be reduced, the operation safety of the boiler can be improved and the service life of the boiler can be prolonged.

Description

technical field [0001] The invention is an improvement to the coal-burning combustion-supporting agent, in particular to a coal-burning combustion-supporting agent which integrates combustion-supporting, sulfur fixation, coke cleaning and ash cleaning. Background technique [0002] In order to improve coal combustion efficiency and / or reduce pollutant emissions and coking, one method is to add coal-burning additives with corresponding functions to coal, such as combustion aids, sulfur-fixing agents, decoking agents, and smoke suppressants. Although there are various functional coal-fired additives in the prior art, they can only be used separately due to the single composition of the formula and single function, and the addition amount of the coal-fired additive itself is extremely small, generally no more than 4-8wt%. It is very troublesome, and the addition work is cumbersome, which makes people unwilling to use it, and because the amount of addition is very small, it is d...

AI Technical Summary

Problems solved by technology

It only has a combustion-supporting function, and contains a lot of sodium, which will cause corrosion to the heating surface of the equipment

[0004] Chinese patent CN1724621 coal-burning additive, which is mixed with salt combustion-supporting agent and quicklime absorbent in a weight ratio of 4-10%: 96-90%, has only combustion-supporting catalytic effect, and salt is highly corrosive to equipment

[0008] Most of the above-mentioned existing technologies adopt the principle of oxygen-assisted combustion, and usually use sodium chloride, potassium permanganate, sodium nitrate, magnesium chloride, potassium nitrate, potassium chlorate, etc. as raw materials for coal combustion aids, which are corrosive to the boiler heating surface and will reduce boiler life

Secondly, the function is single, lacking the functions of smoke elimination, anti-coking, and sulfur fixation, and the sulfur emission exceeds the standard