초록 ▼

An in-furnace method and apparatus reduces nitrogen oxides in flue gas by injecting an oil water emulsion into flue gas so that the oil and water mixes with said flue gas. The emulsion has from 35% to 80% water and is injected in sufficient quantities to provide enough oil to promote a reaction betw

An in-furnace method and apparatus reduces nitrogen oxides in flue gas by injecting an oil water emulsion into flue gas so that the oil and water mixes with said flue gas. The emulsion has from 35% to 80% water and is injected in sufficient quantities to provide enough oil to promote a reaction between the nitrogen oxides in the flue gas and the oil, so as to reduce nitrogen oxide content of the flue gas and to maintain overall fuel lean conditions above the primary combustion zone. The emulsion preferably is atomized before injection and may also be injected in jet streams. Other materials such as limestone, ammonia and urea could be added to the oil water emulsion prior to injection.

대표청구항 ▼

[ We claim:] [1.]1. An in-furnace method of reducing nitrogen oxides in flue gas produced when a fuel is burned in a primary combustion zone comprising the step of injecting an oil water emulsion into flue gas so that the oil and water mixes with said flue gas, the oil being in sufficient quantity t

[ We claim:] [1.]1. An in-furnace method of reducing nitrogen oxides in flue gas produced when a fuel is burned in a primary combustion zone comprising the step of injecting an oil water emulsion into flue gas so that the oil and water mixes with said flue gas, the oil being in sufficient quantity to promote a reaction between said nitrogen oxide in the flue gas and said oil, so as to substantially reduce nitrogen oxide content of the flue gas and to maintain overall fuel lean conditions above the primary combustion zone.