초록 ▼

A combustion method enabling reduced NOx formation wherein fuel and oxidant are separately injected into a combustion zone in a defined velocity relation, combustion gases are aspirated into the oxidant stream prior to intermixture with the fuel, and the fuel is maintained free from contact with oxy

A combustion method enabling reduced NOx formation wherein fuel and oxidant are separately injected into a combustion zone in a defined velocity relation, combustion gases are aspirated into the oxidant stream prior to intermixture with the fuel, and the fuel is maintained free from contact with oxygen until the intermixture.

대표청구항 ▼

A method for combusting fuel and oxidant to achieve reduced formation of nitrogen oxides, comprising: (A) heating a combustion zone to a temperature at least equal to 1500°F.; (B) injecting into the heated combustion zone a stream of oxidant at a velocity within the range of from 200 to 1070 feet pe

A method for combusting fuel and oxidant to achieve reduced formation of nitrogen oxides, comprising: (A) heating a combustion zone to a temperature at least equal to 1500°F.; (B) injecting into the heated combustion zone a stream of oxidant at a velocity within the range of from 200 to 1070 feet per second; (C) injecting into the combustion zone, spaced from the oxidant stream, a fuel stream at a velocity such that the ratio of oxidant stream velocity to fuel stream velocity does not exceed 20; (D) aspirating combustion gases into the oxidant stream and thereafter intermixing the aspirated oxidant stream and fuel stream to form a combustible mixture; (E) combusting the combustible mixture to produce combustion gases for the aspiration of step (D); and (F) maintaining the fuel stream substantially free from contact with oxidant prior to the intermixture with aspirated oxidant of step (D).