초록 ▼

A method and apparatus for afterburning of hydrocarbon with air. Exhaust gas from a process in which hydrocarbon has been evolved is combusted with air to produce reduced NOX emissions. Hydrocarbon fuel is burned in an air mixture at an equivalence ratio of less than 1 oxygen to 1 hydrocarbon fuel (

A method and apparatus for afterburning of hydrocarbon with air. Exhaust gas from a process in which hydrocarbon has been evolved is combusted with air to produce reduced NOX emissions. Hydrocarbon fuel is burned in an air mixture at an equivalence ratio of less than 1 oxygen to 1 hydrocarbon fuel (ERX results from the combustion and oxidation.

대표청구항 ▼

What is claimed is: 1. An afterburning method for reducing NOX emissions from industrial exhaust containing evolved hydrocarbon comprising: burning exhaust hydrocarbon in an air mixture at an equivalency ratio of oxidant to hydrocarbon of ERHTLT) greater than 1 oxygen to 1 hydrocarbon (ERLT>1.0).

What is claimed is: 1. An afterburning method for reducing NOX emissions from industrial exhaust containing evolved hydrocarbon comprising: burning exhaust hydrocarbon in an air mixture at an equivalency ratio of oxidant to hydrocarbon of ERHTLT) greater than 1 oxygen to 1 hydrocarbon (ERLT>1.0). 9. The method of claim 1 wherein oxidizing the unburned light hydrocarbon gas substantially completely at a temperature of less than about 800° C. comprises injecting an excess amount of oxygen into the light hydrocarbon gas to form a mixture having an equivalency ratio (ERLT) greater than 1 oxygen to 1 hydrocarbon (ERLT>1.0). 10. An afterburning method for reducing NOX emissions from industrial exhaust containing evolved hydrocarbon comprising: burning exhaust hydrocarbon in an air mixture at an equivalency ratio of oxidant to hydrocarbon of ERHTX emissions, the afterburner comprising: a combustion zone; a low NOX methane burner in the combustion zone for heating and burning of methane and air mixture above a first temperature of more than about 900° C. to produce a hot gas; an injector for providing an exhaust gas stream containing hydrocarbon into combustion zone; a temperature control for controlling the temperature in the burning zone comprising an adjustment for the amount of methane gas supplied to the NOX burner the mixture of hot gas, hydrocarbon exhaust gas, and air mixture, to maintain both the first temperature at more than about 900° C. and the equivalence ratio ERHT of (oxygen):(hydrocarbon)X emissions from industrial exhaust containing evolved hydrocarbon comprising: burning exhaust hydrocarbon in an air mixture at an equivalency ratio of oxidant to hydrocarbon of ERHT2+H2O+CvHw (volatile unburned hydrocarbon)+ERLTO2→CO2+H2 Odescription="In-line Formulae" end="tail" where ERLT (is the equivalency ratio of O2 to the remaining volatile unburned hydrocarbon for the relatively lower temperature oxidation) and ERLT>1.0. 13. An afterburning method for reducing NOX emissions from industrial exhaust containing evolved hydrocarbon comprising: burning exhaust hydrocarbon in an air mixture at an equivalency ratio of oxidant to hydrocarbon of ERHTxHyNz1Oz2Sz3+ER HT(O2N2)→a(CO2)+b (H2O)+c(CvHw)+[d(SOx2 )+e(NOx)+f(O2)+g(N2)] description="In-line Formulae" end="tail" where, ERHT (is the equivalency ratio of O2 to hydrocarbon for the high temperature burning) and ERHT1, z2, z3<