Method and device for adjusting air ratio
AssigneeGVP Gesellschaft zur Vermarktung der Porenbrennertechnik mbH
InventorPeter Goebel
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for setting the air ratio of a fuel/air mixture made from a gaseous fuel and air for the operation of a burner, wherein a) the mass current of the fuel is determined as first measured value, b) a value for the determination of the Wobbe index of the fuel is determined as second measured value, c) a mass current of the air is determined as third measured value, and d) the mass current of the air and/or the fuel is controlled in dependence on at least two of the measured values so that a specified air ratio λ of the fuel/air mixture is set.
Claims32
Method of setting the air ratio λ of a fuel/air mixture made from a gaseous fuel and air for operation of a burner (18), wherein
- a) the mass current of the fuel is determined as first measured value,
- b) a value for determination of the Wobbe index of the fuel is determined as second measured value,
- c) a mass current of the air is determined as third measured value, and
- d) the mass current of the air and/or the fuel is controlled in dependence on at least two of the measured values so that a specified air ratio λ of the fuel/air mixture is set.
Method as defined in one of the preceding claims, wherein the measured values are sent to a data processing device (4), processed in accordance with a specified algorithm, and via the data processing device (4) the mass current of the fuel is regulated with a first dosing valve (9, 38) connected in the fuel current.
Method as defined in one of the preceding claims, wherein the air ratio λ is regulated in dependence on the stability of a flame generated in the burner (18).
Method as defined in one of the preceding claims, wherein the air ratio λ is regulated in dependence on a specified heating capacity of the burner (18).
Method as defined in one of the preceding claims, wherein the air ratio λ is regulated so that the emissions created during combustion are minimal.
Method as defined in one of the preceding claims, wherein a mass current of the fuel is regulated on the basis of the first and second measured value so that a specified heat value of the fuel fed to the burner (18) per time unit is held primarily constant.
Method as defined in one of the preceding claims, wherein the viscosity of the fuel or a function of the same is determined as second measured value.
Device for performance of the method as defined in one of the preceding claims,
- wherein a first mass current sensor in for the determination of a first measured value, a device (5) for measuring the second measured value for the determination of the Wobbe index, and a first dosing valve (9) are connected a fuel feeder line (1),
- wherein a second mass current sensor (13) is connected in an air feeder line (12, 28) for the determination of a third measured value,
- wherein a means (15) of controlling the mass current of the air is provided,
- wherein a data processing device (4) is provided for the regulation of the mass current of the fuel via the first dosing valve (9);
- wherein the mass current of the fuel can be regulated in dependence on the first and second measured value so that a specified heat value of the fuel fed to the burner (18) per time unit is held primarily constant, and
- wherein the mass current of the air can be controlled by the data processing device (4) in dependence on at least two of the measured values so that a specified air ratio λ can be set.
Dependencies are inferred from the claim text.