Patent ID: 8142186
Filing Date: 2012-03-27
Classification: F23D,F23N,F23R

Abstract:
1. A premix burner arrangement, comprising: a liquid fuel supply device that supplies a liquid fuel to the arrangement; a combustion chamber; a burner associated with the combustion chamber that combusts a fuel wherein the burner has: wherein the internal passage is arranged within a member of the burner body that forms a base of a burner space of the combustion chamber by an end face of the burner body, where a flame of the burner is operatively located and which extends from a base of the burner space towards the combustion chamber, wherein the arrangement further comprises a temperature sensor that measures the temperature of the solid burner body at least one location, a valve device in communication with the internal passage, and a control unit that, upon start up of the arrangement, keeps the valve device closed for injecting substantially all the fuel passing through the internal passage into the space through an injector device, and, when receiving information from the sensor that the temperature has exceeded a predetermined temperature level, opens the valve device to convey at least a portion of the fuel evaporated in the internal passage through a plurality of circumferentially distributed openings into the burner space, a plurality of main gas injecting members arranged adjacent to the burner space, and wherein the conveying device conveys at least a portion of the fuel evaporated in the internal passage to the space through the main gas injecting members, and wherein the valve device is adapted to open and close the fuel flow path to the main gas injecting members, the arrangement comprising a further valve device in communication with the internal passage, and where the control controls the further valve device to start to open at a certain load on the arrangement and to assume an opening degree varying with the load so as to convey at least a portion of the fuel evaporated in the internal passage to the main gas injecting members.