US 6,068,470 AGranted

Dual-fuel burner

AssigneeMTU Motoren- und Turbinen-Union Munich GmbH

InventorsNikolaos Zarzalis, Klaus Merkle, Wolfgang Leuckel

Life of this patent

Estimating the term…

Loading patent…

Abstract

The present invention provides dual-fuel burners for the oxidation of liquid and of gaseous fuel with air. A dual-fuel burner is provided with an atomizer nozzle which generates a divergent spray cone of liquid fuel, and with an annular atomizer lip as an impact member for the liquid fuel spray cone. The dual-fuel burner has a primary channel for a first air stream through the spray cone and the inside of the atomizer lip, and a secondary channel for a second air stream over the outside of the atomizer lip with a common, coaxial mouth at an atomizer edge thereof. A channel for the gaseous fuel leads into the inside of the atomizer lip between the primary and secondary channels and discharges into one or both of the primary and secondary channels upstream of the atomizer edge.

Claims8

Dependent claims

A dual-fuel burner for the oxidation of liquid fuel with air and gaseous fuel in a combustion chamber, comprising:

a liquid fuel atomizer nozzle having an axis, and which generates a divergent spray cone of liquid fuel;
an annular atomizer lip concentric to the axis of the atomizer nozzle and forms an impact member for the spray cone;
a primary air stream channel flow connected to an inside of the atomizer lip, the primary air stream channel adapted to conduct a first air stream to the spray cone;
a secondary air stream channel flow connected over an outside of the atomizer lip, the secondary air stream channel adapted to conduct a second air stream to the first air stream;
and
a gaseous fuel channel between the primary and the secondary air stream channels and flow connected to the atomizer lip, the gaseous fuel channel discharges into at least one of the primary and secondary air stream channels upstream of an atomizer edge of the atomizer lip and downstream of an air flow twist generator in the at least one of the primary and secondary air stream channels.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/240,477Filed 29 Jan 1999
Priority: DE 198 03 87931 Jan 1998
Granted: 30 May 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F23D 11/007
With combinations of different spraying or vaporising means: combination of means covered by sub-groups F23D11/10 and F23D11/24
F23D 11/107
Medium and fuel meeting at the burner outlet: at least one of both being subjected to a swirling motion
F23D 17/002
Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel: gaseous or liquid fuel
F23D 2900/11101
Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas: pulverising gas flow impinging on…