A system for providing combustion in a boiler having a combustion area comprising: a fuel pipe operable to deliver fuel; a duct with an outer perimeter, the duct being in fluid communication with the fuel pipe and a duct outlet provided for being in fluid communication with the combustion area of the boiler; a bend coupled into the duct; and a first partition plate disposed in the duct to form a first parallel flow of the fuel between the outer perimeter and the first partition plate, upstream of the bend; wherein the duct comprises: a first concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a first concentric flow of the fuel for combustion, concentric to the duct, wherein the first partition plate and the outer perimeter of the duct are connected to the first concentric conduit through a first portion of the bend to transition the first parallel flow of the fuel into the first concentric flow of the fuel; a second partition plate, disposed in the duct, to form a second parallel flow of the fuel between the first partition plate and the second partition plate upstream of the bend, and a second concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a second concentric flow of the fuel for combustion concentric to the duct, wherein the second partition plate and the outer perimeter of the duct are connected to the second concentric conduit through a second portion of the bend to transition the second parallel flow of the fuel into the second concentric flow of the fuel; and wherein the second concentric conduit surrounds the first concentric conduit in such a way that the first concentric flow of fuel is surrounded by the second concentric flow of fuel and both the flows (130, 140) remain separated as they flow in their respective conduits (110, 120). a fuel pipe operable to deliver fuel; a duct with an outer perimeter, the duct being in fluid communication with the fuel pipe and a duct outlet provided for being in fluid communication with the combustion area of the boiler; a bend coupled into the duct; and a first partition plate disposed in the duct to form a first parallel flow of the fuel between the outer perimeter and the first partition plate, upstream of the bend; wherein the duct comprises: a first concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a first concentric flow of the fuel for combustion, concentric to the duct, wherein the first partition plate and the outer perimeter of the duct are connected to the first concentric conduit through a first portion of the bend to transition the first parallel flow of the fuel into the first concentric flow of the fuel; a second partition plate, disposed in the duct, to form a second parallel flow of the fuel between the first partition plate and the second partition plate upstream of the bend, and a second concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a second concentric flow of the fuel for combustion concentric to the duct, a first concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a first concentric flow of the fuel for combustion, concentric to the duct, wherein the first partition plate and the outer perimeter of the duct are connected to the first concentric conduit through a first portion of the bend to transition the first parallel flow of the fuel into the first concentric flow of the fuel; a second partition plate, disposed in the duct, to form a second parallel flow of the fuel between the first partition plate and the second partition plate upstream of the bend, and a second concentric conduit, concentrically positioned in the duct downstream of the bend, to deliver a second concentric flow of the fuel for combustion concentric to the duct, wherein the second partition plate and the outer perimeter of the duct are connected to the second concentric conduit through a second portion of the bend to transition the second parallel flow of the fuel into the second concentric flow of the fuel; and wherein the second concentric conduit surrounds the first concentric conduit in such a way that the first concentric flow of fuel is surrounded by the second concentric flow of fuel and both the flows (130, 140) remain separated as they flow in their respective conduits (110, 120).