Method and apparatus for monitoring and controlling combustion in combustible gas burner apparatus
AssigneeSit S.P.A.
InventorsFiliberto Rimondo, Roberto Mottola, Loris Barduca, Loris Bertoli, Fernando Carpignani Panebianco
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Abstract
The apparatus and method according to the present invention are adapted to adjust, in a combustible gas burner, a mixture of gas formed by a first gas and a second combustible gas, wherein the gas mixture is provided through the appropriate mixing of an amount of said first gas by means of a first adjustment element and an amount of said combustible gas by means of a second adjustment element. Said first or second adjustment elements are managed, during operation, by a controller, which processes the data coming from at least two sensors.
Claims13
A method for controlling the composition of a gas mixture for a burner, said mixture comprising a first gas, regulated by a fan of which the number of revs per minute, n, is controlled and a second combustible gas, regulated by a valve of which the degree of opening, s, is controlled;
- wherein a first sensor is adapted to provide a signal proportionate to the number of revs per minute of the fan and a second flame sensor is adapted to provide a signal proportionate to an electrical feature of the flame of the burner, and wherein said method comprises three control loops for adjusting the thermal power, W, supplied by the burner:
- a first quick adjustment control loop adapted to set the number of revs n of said fan and the position, s, of the actuator of said valve based on values of reference contained in a table, T1, T2, and associated with the thermal power value, W, required for the burner, a second slow adjustment control loop adapted to monitor the combustion through the detections of said first flame sensor and a third slow adjustment control loop adapted to monitor the combustion through the calculation of the ratio between the variation of the detection of said first flame sensor and the variation of the position, s, of the actuator of said valve, which caused it.
An apparatus for monitoring and controlling the composition of a gas mixture comprising a first gas and a second combustible gas, said apparatus comprising:
- a fan for adjusting the flow of a first gas, a valve adapted to adjust the composition of said gas mixture, a burner adapted to burn said gas mixture, a first sensor adapted to measure the number of revs of the fan, at least one second sensor arranged close to the flame of the burner and adapted to measure at least one electrical parameter of the flame of the burner, a controller adapted to pilot said fan and said valve based on the processing of the signals coming from said first sensor and from said at least one second sensor.
Dependencies are inferred from the claim text.