Pulse combustion apparatus
AssigneeJohn A. Kitchen Ltd.
InventorJohn A. Kitchen
Life of this patent
Estimating the term…
Abstract
Various improvements in pulsating combustors for use in dehydration are disclosed. In one aspect of the invention, gas is introduced into the combustion chamber through a fuel distributor providing a bluff body within the combustion chamber so that a striated charge having streaks of gas and air is produced. The tail pipe of the combustor has an enlarged outer portion provided with an inlet for material to be dehydrated so that an injector action occurs at the point of material entry. A valve may be associated with the material inlet so that the material is introduced in timed relation to the pulse combustion cycle. Other aspects of the invention concern a rotary mechanically driven air admitting valve for the combustion chamber and a gas supply arrangement designed to provide for low- and high-fire operating modes.
Claims22
A pulse combustion apparatus comprising:
- a combustion chamber having inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber;
- and,
- means operable to initiate combustion in said chamber;
- wherein said fuel charge inlet means comprises:
- a fuel gas distributor forming a bluff body within the combustion chamber and defining an annular combustion air passageway around the body, the distributor having a fuel inlet for connection to a fuel supply externally of the combustion chamber, and a plurality of discrete fuel gas outlets extending around a peripheral surface of the bluff body and from which individual gas streams issue when the apparatus is in operation;
- and,
- valve means for admitting air to said air passageway during low pressure portions of the pulse combustion cycle;
- whereby, at each cycle, a striated charge having streaks of gas and air is introduced into the combustion chamber.
A pulse combustion dehydration apparatus comprising:
- a combustion chamber having inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber;
- and,
- means operable to initiate combustion in said chamber;
- wherein said exhaust pipe includes an inner portion adjacent said combustion chamber of a first diameter and an outer portion adjacent said inner portion of increased diameter, and wherein the exhaust pipe is provided in said outer portion with an inlet for material to be dehydrated arranged so that gases flowing from said inner portion to said outer portion cause an injector action at said material inlet.
A pulse combustion apparatus comprising:
- a combustion chamber having inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber;
- and,
- means operable to initiate combustion in said chamber;
- wherein said fuel charge inlet means comprises means for delivering fuel to said combustion chamber and a rotary air admitting valve controlling communication between said combustion chamber and a combustion air supply, said valve comprising first and second plates mounted in face-to-face contact, a first one of said plates being fixed and a second one of said plates being rotatable with respect to the fixed plates, the plates being formed with co-operating opening for controlling communication between said combustion air supply and said combustion chamber, and drive means for rotating said second plate at a speed appropriate to the pulsating combustion cycle of the apparatus.
A pulse combustion apparatus comprising:
- a combustion chamber having inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber;
- means operable to initiate combustion in said chamber;
- and,
- fuel supply means connected to said combustion chamber inlet means and including means operable to restrict fuel flow to said inlet means for providing a low fire operating mode for starting of the apparatus and a high fire normal operating mode.
A pulse combustion apparatus comprising:
- a combustion chamber having a fuel gas inlet, valve means for admitting air to said combustion chamber during low pressure portions of the pulse combustion cycle and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber;
- means operable to initiate combustion in said chamber;
- and,
- fuel supply means connected to said fuel gas inlet and including a gas supply line and means remote from said combustion chamber operable to modulate fuel flow to said fuel gas inlet according to load conditions.
Pulse combustion dehydration apparatus comprising a series of at least two pulse combustors each having a combustion chamber with inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means, an exhaust pipe extending from said gas outlet and forming a resonant system with the combustion chamber, the exhaust pipe including an inlet for material to be dehydrated, and means operable to initiate combustion in said chamber, each said combustor having associated therewith material collection means having an inlet receiving the exhaust pipe of the combustor, a gas outlet and a gas outlet for material that has been dehydrated;
- said combustors being disposed in a cascade arrangement with the outlet of the material collection means of a first one of said combustors communicating with the material inlet of the exhaust pipe of a second said combustor, whereby the material is subjected to successive dehydration processing in each of said combustors.
A pulse combustion apparatus comprising:
- a combustion chamber having inlet means for fuel charges and an outlet for exhaust gases remote from the inlet means;
- an exhaust pipe extending from said exhaust gas outlet and forming a resonant system with the combustion chamber, the exhaust pipe including a material inlet;
- means operable to initiate combustion in said chamber;
- fuel supply means connected to said combustion chamber inlet means and including means operable to modulate fuel flow to said inlet means according to load conditions;
- material collection means having an inlet through which said exhaust pipe extends, a gas outlet and a material inlet;
- a temperature sensor in said material collection means;
- and,
- control means connected between said sensor and said fuel flow modulation means and adapted to control said flow modulation means to modulate fuel flow according to the temperature detected by said sensor.
Dependencies are inferred from the claim text.