Patent ID: 9003804
Filing Date: 2015-04-14
Classification: F23C,F23D,F23N,F23R

Abstract:
1. An injector for a low-calorific value fuel combustion system comprising: a nozzle body defining a fuel circuit for injecting low-calorific value fuel; and an auxiliary nozzle mounted to the nozzle body and defining a fuel circuit for injecting at least one of natural gas and liquid fuel; an inner set of injection ports defined at an outlet of the nozzle body, wherein the inner set is configured to inject a flow of fuel; an intermediate set of injection ports defined radially outward from the inner set at an outlet of an air circuit, wherein the intermediate set is aligned to inject a converging, swirling flow of air, which intersects the flow of fuel from the innermost set; and an outer set of injection ports defined radially outward from the intermediate set at the outlet of the air circuit, wherein the outermost set is aligned to inject a converging, non-swirling flow of air, which converges into the flows of gas and air from innermost and intermediate sets, wherein the nozzle body includes an inner wall and an outer wall outboard of and spaced apart from the inner wall, wherein the fuel circuit of the nozzle body passes through the inner and outer walls, and wherein the auxiliary nozzle is inboard of and spaced apart from the inner wall of the nozzle body.