Additive capable of improving coal combustion efficiency and reducing NOx emission simultaneously

Abstract

The invention relates to an additive which is an improvement on a coal combustion additive taking MMT (methyl-cyclopentadienyl-manganese-tricarbony) as an effective component. The additive contains the following components: 0.01-0.1wt% of the MMT, 0.005-0.02wt% of tetrabutyl titanate, 0.005-0.02wt% of iron acetylacetone, 0.1-0.5wt% of sulfonate type anionic surfactants, 0.1-1wt% of dimethylbenzene and / or diesel oil and the balance of water. With the additive, a cheap water solution solvent which is uniformly dispersed and is diluted by a large mulriple is prepared, so that a ppm (parts per million)-grade trace effective added component MMT is uniformly dispersed on coal particles in practical application, and the amount of the original single MMT in ppm-grade added into the coal is changed into the amount of the water solution in percentage-grade added into the coal, thereby solving the problem of being difficult to add in actual application, not only greatly facilitating the actual adding and use, but also reducing the requirements on adding equipment for mixing with coal. By only adopting a common stirring device, the additive can be uniformly added and dispersed on the surface of the coal powder. As the tetrabutyl titanate and the iron acetylacetone are added simultaneously, by virtue of the synergistic effect, the catalyzing effect of the MMT during combustion of the coal is further improved. The amount of the combination liquid solvent added into the coal is 1-2 wt%. Therefore, the content of carbon in fly ash can be reduced by 26-67 percent, and the NOx emission can be reduced by 30-40 percent.

Description

technical field

[0001] The present invention is an improvement to the coal combustion additive with methylcyclopentadiene manganese tricarbonyl as an active ingredient, and especially relates to a kind of low-cost and large-scale water dilution, which still has good catalytic activity and can simultaneously improve coal combustion efficiency and Additives to reduce NOx emissions. Background technique

[0002] The combustion of coal in the furnace is affected by many factors. Objectively, it is difficult to fully and completely burn. Insufficient coal combustion not only cannot fully utilize its heat energy, resulting in waste of energy, but also produces dust and NOx emissions, resulting in air quality deterioration, serious polluted environment. For a long time, people have been working on various coal combustion additives to improve the combustion efficiency of coal and reduce the emission of NOx and dust.

[0003] Chinese patents CN1576356, CN1576357, and CN1597832 disc...

Examples

Embodiment

[0017] Embodiment: by implementing table 1 proportioning (component unit is wt%), first MMT is dissolved in xylene and / or diesel oil, then add sulfonate type anionic surfactant and water successively, under lucifuge condition Stir and mix evenly to obtain the liquid composition of the present invention.

[0018] The compositions of Examples and Comparative Examples were respectively added with Shenmu anthracite coal powder (see Table 3 for ingredients) with a coal powder amount of 1.2wt% and sprayed and stirred, stirred and mixed for more than 1 hour, and then sent to the combustion furnace, and the amount of coal fed was increased every hour. The sample size is 40kg, and under the conditions of primary wind speed 80Pa and secondary wind speed 300Pa, the influence of each sample on the carbon content and denitrification efficiency of the fly ash during the coal combustion process is shown in Table 2.

[0019] Note: The experiment was carried out on the one-dimensional furnace ...

technical field

[0001] The present invention is an improvement to the coal combustion additive with methylcyclopentadiene manganese tricarbonyl as an active ingredient, and especially relates to a kind of low-cost and large-scale water dilution, which still has good catalytic activity and can simultaneously improve coal combustion efficiency and Additives to reduce NOx emissions. Background technique

[0002] The combustion of coal in the furnace is affected by many factors. Objectively, it is difficult to fully and completely burn. Insufficient coal combustion not only cannot fully utilize its heat energy, resulting in waste of energy, but also produces dust and NOx emissions, resulting in air quality deterioration, serious polluted environment. For a long time, people have been working on various coal combustion additives to improve the combustion efficiency of coal and reduce the emission of NOx and dust.

[0003] Chinese patents CN1576356, CN1576357, and CN1597832 disc...

Examples

Embodiment

[0017] Embodiment: by implementing table 1 proportioning (component unit is wt%), first MMT is dissolved in xylene and / or diesel oil, then add sulfonate type anionic surfactant and water successively, under lucifuge condition Stir and mix evenly to obtain the liquid composition of the present invention.

[0018] The compositions of Examples and Comparative Examples were respectively added with Shenmu anthracite coal powder (see Table 3 for ingredients) with a coal powder amount of 1.2wt% and sprayed and stirred, stirred and mixed for more than 1 hour, and then sent to the combustion furnace, and the amount of coal fed was increased every hour. The sample size is 40kg, and under the conditions of primary wind speed 80Pa and secondary wind speed 300Pa, the influence of each sample on the carbon content and denitrification efficiency of the fly ash during the coal combustion process is shown in Table 2.

[0019] Note: The experiment was carried out on the one-dimensional furnace ...