REDUCING ENVIRONMENTAL POLLUTION AND FOULING WHEN BURNING COAL

摘要

Powder components containing calcium, alumina, silica, iron, magnesium, and a halogen sorbent are used in combination during coal combustion to produce environmental benefits. Sorbents are added to the coal ahead of combustion and/or are added into the flame or downstream of the flame. The alkalinity and chlorine of the powder is minimized in order to mitigate unwanted fouling, especially when used with sub-bituminous and lignite coals.

主权项

1. A method of burning coal in a furnace to reduce emissions of NOx and at least one of SOx and mercury, the method comprising burning a refined coal in the furnace, wherein the refined coal comprises an admixture of sub-bituminous coal or lignite coal, bromine compound, and a powder sorbent, and
wherein the powder sorbent comprises calcium, silica, alumina, and further comprises less than 1% by weight Na2O and less than 1% by K2O, based on the weight of the powder sorbent.