Burner system in particular with a high velocity of the burnt gases

A burner system in particular with a high outlet velocity of the burnt gases, comprising:

• a central hearth tube defining a combustion chamber in which is admitted a mixture of combustible gas and of combustion-supporting gas such as air;
• a tubular element coaxially surrounding said hearth tube so as to form an annular space thereabout to allow flow of combustion-supporting air to be admitted into the hearth tube;
• the hearth tube having an outlet end and the outlet end being formed with a reduced portion made from thermomechanical ceramic for increasing the outlet speed of the gases, the tubular element having an outlet end having a radial restriction which forms an axial and radial positioning stop for the hearth tube, the hearth tube being axially biased into assembly with the other component parts of the burner by an assembly means for producing an axial pressure force under the impact of which the hearth tube bears against said stop through a radial shoulder provided in the reduced portion of the hearth tube, the system further comprising a tube made from a metal alloy, the tube having a first end portion adjacent to said hearth tube with substantially the same diameter as said hearth tube and is axially aligned with the hearth tube inside of said tubular element and a duct extending in the tube, the duct feeding gas to said combustion chamber;
• and a burner shell, said assembling means producing an axial assembling force between said tube and a stationary portion of the burner shell, the assembling means comprising a magnet mounted on the outer surface of said tube at a location near a metal portion of the burner shell on a second end portion of said tube which is opposite to the first end to produce an axial pulling force between this magnet and said metal part.

A burner system in particular with a high outlet velocity of the burnt gases, comprising;

• a central hearth tube defining a combustion chamber in which is admitted a mixture of combustible gas and of combustion-supporting gas such as air, the combustion chamber having a gas outlet end and an end opposite the gas outlet;
• a tubular element coaxially surrounding said hearth tube so as to form an annular space thereabout to allow flow of combustion-supporting air to be admitted into the hearth tube;
• the hearth tube having an outlet end, the outlet end being formed with a reduced portion made from thermomechanical ceramic for increasing the outlet speed of the gases;
• the tubular element having an outlet end having a radial restriction which forms an axial and radial positioning stop for the hearth tube, the hearth tube being axially biased into assembly with the other component parts of the burner by an assembly means for producing an axial pressure force under the impact of which the hearth tube bears against said stop through a radial shoulder provided in the reduced portion of the hearth tube, the system further comprising a tube made from a metal alloy, the tube having a portion adjacent to said hearth tube with substantially the same diameter as said hearth tube and the tube being axially aligned with the hearth tube inside of said tubular element and in a duct extending in the tube, feeding gas to said combustion chamber;
• and a burner shell, said assembling means producing an axial assembling force between said tube and a stationary portion of the burner shell, wherein said combustion chamber is closed on the end opposite to the gas outlet by a transparent disc which extends at right angles to the center line axis of said hearth tube;
• and at least one window provided in the shell of the burner, the window being transparent to ultraviolet radiations such that the flame is visible through the transparent disc and window.

A burner system in particular with a high outlet velocity of the burnt gases, comprising;

• a central hearth tube defining a combustion chamber in which is admitted the mixture of combustible gas and of combustion-supporting gas such as air;
• a tubular element coaxially surrounding said hearth tube so as to form an annular space thereabout to allow flow of combustion-supporting air to be admitted into the hearth tube;
• the hearth tube having an outlet end and the outlet end being formed with a reduced portion made from thermomechanical ceramic for increasing the outlet speed of the gases;
• the tubular element having an outlet end having a radial restriction which forms an axial and radial positioning stop for the hearth tube, the hearth tube being axially biased into assembly with the other component parts of the burner by an assembly means adapted for producing an axial pressure force under the impact of which the hearth tube bears against said stop through a radial shoulder provided in the reduced portion of the hearth tube, the system comprising a tube made from a metal alloy, the tube having a portion adjacent to said hearth tube with substantially the same diameter as said hearth tube and the tube being axially aligned with the hearth tube inside of said tubular element and a duct extending in the tube, the duct feeding gas to said combustion chamber;
• and a burner shell, said assembling means producing an axial assembling force between said tube and a stationary portion of the burner shell;
• said burner being a regenerative type burner and comprising an outer tubular shell which forms an annular space about said tubular element for recirculating burnt gases, a heating device comprising a glove finger-shaped radiant tube, the radiant tube including a tubular outer shell having an axial extension which forms the outer tubular shell of the burner and an inner ceramic tube located in axial extension of the hearth tube, the inner ceramic tube comprising a plurality of sections axially connected by pivotal connecting means providing a flexible coupling.