A miniature liquid combustor includes a double pre-heating structure. A method of operating the combustor comprises introducing liquid hydrocarbon fuel and air into a combustion chamber and stably combusting above a metal catalytic grid. The flames of the combustor first heating a third sleeve, the heated third sleeve gradually radiating the thermal energy to first and second fuel pre-heating chambers until the entire miniature liquid combustor is heated. The process continues to respectively implement second pre-heating of air introduced into the air pre-heating chambers and fuel introduced into the fuel pre-heating chambers before introducing them into the combustion chamber. The resulting combustor and combustion method enable double counter-flow pre-heating of air and fuel before being introduced into the combustion chamber, such that the air and the fuel are fully preheated before combustion.

According to an embodiment, a fired heater includes a fuel and combustion air source configured to output fuel and combustion air into a combustion volume, the combustion volume including a combustion volume wall defining a lateral extent separate from an exterior volume. According to an embodiment, the fired heater includes a boiler heater and the combustion volume wall comprises a combustion pipe defining a lateral extent of the combustion volume, the combustion pipe being disposed to separate the combustion volume from a water and steam volume. The fired heater includes a mixing tube aligned to receive the fuel and combustion air from the fuel and combustion air source. The mixing tube may be separated from the combustion volume wall by a separation volume. The fired heater includes a bluff body flame holder aligned to receive a fuel and combustion air mixture from an outlet end of the mixing tube. The bluff body flame holder may be configured to hold a combustion reaction for heating a combustion volume wall. The combustion volume wall may include a combustion pipe. The combustion pipe may be configured to heat the water in the water and steam volume.

This disclosure relates to flame shapers for use in gas burners, gas burner systems, and methods for operating gas burner systems. Flame shaper embodiments include an opening having an unobstructed center, and turning vanes that extend from the perimeter of the opening towards its center. The turning vanes are configured to induce swirling in an ignited flame. Burner systems include an ignition source, the flame shaper, and a heat exchanger. In method embodiments, a flame is formed by igniting fuel and air, the flame is directed through the flame shaper, and the flame is then directed into a heat exchanger.

Horizontal immersion tube boilers include a plurality of burner nozzles positioned in substantial alignment with a respective plurality of boiler tubes. Fuel-air mixture directed through the burner nozzles are ignited by a pilot flame system positioned proximate to the burner nozzles within a combustion chamber. The burner nozzles and pilot flame system receive air from a secondary air manifold having inlets that provide secondary air into the combustion chamber. The flames extending from the burner nozzles are directed into the respective boiler tubes, which exchange heat from the flame into water within a boiler shell. The secondary air inlets direct air around the burner nozzles and toward the boiler tubes, creating an air blanket around each burner nozzle for reducing turbulence and guide the flames into their respective boiler tubes. An improved flame arrestor within the nozzle prevents flame back-flow when modulating to lower firing rates.

A gas turbine engine and a combustor are described herein. The combustor includes a fuel vaporizer coupled to a combustor wall, which extends into a combustion chamber. A fuel injector having a nozzle extends within a portion of the fuel vaporizer. A dome swirler is coupled to an upstream dome portion of the combustor wall. The swirler surrounds a heat shield, which may have a concaved body. The outlet end of the fuel vaporizer is disposed over the heat shield, which may be over the central zone of the heat shield, to face the heat shield. The fuel vaporizer may be coupled to the combustor wall and disposed outside the swirler. Fuel and air mixture exits the vaporizer and impinges against the heat shield and is then combined with the swirler air to become part of the primary zone recirculation.

A jet burner of the present disclosure basically includes a burner unit and an air blower disposed at a rear end of a burning chamber of the burner unit, wherein the burner unit is installed with a fuel bucket for storing fuel and the burning chamber having a tubular shape. Interior of the burning chamber is installed with a least one nozzle, at least one fuel pipe coupled to the fuel bucket is installed at each the nozzle, a front end of the burning chamber is installed with at least one jet pipe, and a pipe diameter of each the jet pipe is less than an inner diameter of the burning chamber. Under the reaction of the jet pipe, the burning stay time of the fuel in the interior of the burning chamber is increased, as to achieve the objective of increasing the fuel burning efficiency.

A booster burner of the present disclosure basically has a burning unit, an air blower disposed at a rear end of a burning chamber of the burning unit and a high-pressure gas providing unit; wherein the burning unit has a fuel bucket for storing fuel and a burning chamber having a tubular shape, interior of the burning chamber has at least one nozzle, at least one fuel tube coupled to the fuel bucket is disposed at each the nozzle; and the high-pressure gas supplying unit has a gas storage bucket for storing high-pressure gas, each the nozzle is installed with a high-pressure pipe coupled to the gas storage bucket. Through the high-pressure gas, the slight atomization and acceleration effect is applied to the fuel which enters the nozzle, such that fuel molecules are refined and more completely burned, and the objective of increasing the fuel burning efficiency is achieved.

A low NOx burner is configured to support a combustion reaction at a selected fuel mixture by anchoring a flame at a conductive flame anchor responsive to current flow between charges carried by the flame and the conductive flame anchor.

A gas combustor having function of adjusting combusting angle includes: a fixed housing having a top end thereof transversally formed with a rod hole; and a rotary housing pivoted with the fixed housing, where one side of the rotary housing is formed with a shaft hole having a plurality of annularly-arranged teeth slots for receiving a locking mechanism having an unlocking press button, a connection rod extrudes from an inner surface of the unlocking press button to pass the shaft hole, be sleeved with a stretch spring and enter the rod hole, the connection rod is connected to a passive member in the fixed housing, the passive member has at least one convex tooth protruding toward the plurality of teeth slots, and each of the at least one convex tooth is to be inserted and positioned in one of the teeth slots to form a locked status.

A high temperature combustion device is provided that is configured to enable dynamic changes in the combustion environment to provide neutral, oxidizing, or reducing combustion environments. The device may include a blast tube and an air blower configured to motivate air through the blast tube. A nozzle for atomizing a fuel, such as vegetable oil, and more preferably waste vegetable oil, may be disposed in the blast tube. A fuel pump may be configured to motivate the fuel to exit the nozzle. An air supply line may be in fluid communication with the nozzle and may be configured to supply high-pressure air to the nozzle. The high-pressure air may exit the nozzle with the fuel in a first direction, and air motivated through the blast tube by the air blower may pass around the nozzle in a second direction that is substantially parallel to the first direction.