METHOD AND BURNER USING THE CURIE EFFECT FOR CONTROLLING REACTANT VELOCITY FOR OPERATION IN PRE-HEATED AND NON-PRE-HEATED MODES

摘要

Methods, burner, apparatuses, and systems are provided for controlling a velocity of a jet of gas exiting a burner when the gas is heated or not and at a corresponding second higher temperature or lower first temperature. Through the use of a temperature-sensitive magnetic valve, the flow of a gas can be redirected to maintain velocity of the gas as delivered to a combustion chamber based on the temperature of the gas. The temperature-sensitive magnetic valve can redirect flow of the gas based on the magnetic state of a ferromagnetic material. The state of the temperature-sensitive magnetic valve changes based on the temperature of the gas to maintain the velocity of the gas delivered through an outlet of the burner to the combustion chamber. Thus, heated gases and standard temperature gases can be delivered at approximately equal velocities thus maintaining flame size and shape.

主权项

1. A method for controlling combustion, comprising:
delivering a gas at a first temperature to a temperature-sensitive valve of a burner in fluid connection with a gas source, the valve comprising: a magnet, a ferromagnetic material in magnetic connection with the magnet, and a flow control structure forming a first pathway and a second pathway ,the burner further comprising one or more first outlets in connection with the first pathway and one or more second outlets in connection with the second pathway, wherein the first outlets have a cumulative first cross-sectional area, and the second outlets have a cumulative second cross-sectional area which is cumulatively greater than the first cross-sectional area; exchanging heat between the gas and the ferromagnetic material such that the ferromagnetic material reaches a first temperature and is positioned at a first position relative to the magnetic material; permitting the gas to flow through the first pathway; delivering the gas at a second temperature to the temperature-sensitive valve, wherein the gas exchanges heat with the ferromagnetic material such that the ferromagnetic material reaches the second temperature; allowing the ferromagnetic material to be moved to a second position relative to the magnetic material that is different from the first position; and permitting the gas to flow through the second pathway, wherein the ferromagnetic material has a curie temperature between 240 degrees Celsius and 600 degrees Celsius, the first temperature is below the curie temperature of the ferromagnetic material, and the second temperature is above the curie temperature of the ferromagnetic material.