Special-purpose metal calcium core granular combustion-supporting desulfurization coke cleaning agent for bombardment type coal and preparation method thereof

Abstract

Provided are an impact combustion-supporting desulfurized and decoking agent special for burning coal and process for preparation. The agent is grainy of metal calcium core and the process for preparation is characterized in that the combustion-supporting desulfurized and decoking agent includes the raw materials at different weight proportion as follows of metal active Ca 5%-12%, Ca2O 15%-25%, Na2CO3 15%-25%, Al2O3 6%-10%, coal powder 25%-32% and inorganic bond 6%-10%. The essential advantage of the invention is in that the metal active Ca is equipped as the central inner core of the round grainy agent of combustion assistance and desulfuration for burning coal and the other materials are sleeved outside the central core as desulfuration agent, thereby crustose round body is shaped, which can keep the metal inner core from connecting with the outer air to prevent oxidization. Besides, the decoking agent is also an effective desulfuration agent. The decoking agent is sprayed into a burning boiler by a spraying and bombarding device special for coal burning boilers, and after entering the high temperature boilers like shrapnel, the grainy additives play the function of high effective combustion supporting, desulfuration and decoking.

Description

technical field [0001] The invention relates to an energy-saving and environment-friendly technology for coal-fired boilers, in particular to a bombardment-type coal-fired special metal calcium core granular combustion-supporting desulfurization desulphurization coke cleaning agent and a preparation method thereof. Background technique [0002] With the continuous deterioration of the atmospheric environment, the whole society has paid great attention to the energy saving of coal-fired boilers and the reduction of the emission of harmful gases such as sulfur dioxide. The comprehensive application of environmental protection technology is one of the important ways to solve this problem, and the coal-fired desulfurization and combustion accelerant that is widely used at present is one of the important technologies. [0003] Various types of desulfurizers in the prior art or additives with combustion-supporting and coke-clearing functions are mainly composed of calcium oxide Ca...

AI Technical Summary

Problems solved by technology

Its disadvantages are that the dosage is relatively large, and the second is that it is very easy to be damp during the preparation and use. Once damp, its efficacy will be greatly reduced.

[0005] The so-called coke cleaning function in the prior art (removing the coke on the inner wall of the boiler), because the various "desulfurization and combustion-supporting coke cleaning additives" entering the boiler are powdery compounds of various elements, the redox catalysis is very poor, and the temperature rises instantly weaker

It is difficult to completely remove the coking scale on the inner wall of the boiler with strong adhesion

[0006] In addition, the powdery "desulfurization, combustion-supporting and decoking" additives in the prior art cannot produce sufficient rate of fire and kinetic energy when sprayed into the boiler, and cannot play an auxiliary physical and mechanical role in "beating" the coke in the boiler

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