A steam generator has a heat exchange chamber with an upstream end and a downstream end. The steam generator further has a burner that injects primary reactants, including fuel and combustion air, into the chamber at the upstream end. A first branch of a once-through water line is located within the chamber downstream of the burner. A second branch of the once-through water line is connected in parallel with the first branch, and is located within the chamber downstream of the first branch. A fuel injector is arranged to inject staged fuel into the chamber at a staged location downstream of the first branch of the once-through water line.

Described herein are embodiments of systems and methods for oxidizing gases. In some embodiments, a reaction chamber is configured to receive a fuel gas and maintain the gas at a temperature within the reaction chamber that is above an autoignition temperature of the gas. The reaction chamber may also be configured to maintain a reaction temperature within the reaction chamber below a flameout temperature. In some embodiments, heat and product gases from the oxidation process can be used, for example, to drive a turbine, reciprocating engine, and injected back into the reaction chamber.

Disclosed is a water heater including a case provided with an air supply hole and an air discharge hole, a burner provided in an interior of the case, and a humidified air supply part that provides humidified air to the burner together with a fuel. The humidified air supply part includes a first accommodation tank that accommodates water to generate vapor, and a humidified air supply tank that provides a space for supplying the vapor supplied from the first accommodation tank to air introduced into an interior of the case through the air supply hole.

A backlit temperature control knob for water heater valves used with water heaters and more particularly to gas water heaters provides a way to read the temperature indication not previously known in the art. Some embodiments rely on a thermocouple or thermopile normally used to power a safety magnet with the pilot light system as a source of electrical energy to selectively illuminate a Light Emitting Diode (LED) which directs light through at least a portion of the knob to assist in reading the temperature indications.

The present invention provides a fireplace flame-extinguishing method, including the following steps: S1: when a shutdown command is received, stopping a heating element from heating a liquid fuel in a vaporization chamber of a vaporization device; and S2: injecting a liquid fuel having a temperature lower than a boiling point of the liquid fuel into the vaporization chamber of the vaporization device, to decrease a temperature of the liquid fuel in the vaporization chamber below the boiling point of the liquid fuel. According to the present invention, the liquid fuel having the temperature lower than the boiling point of the liquid fuel is injected into the vaporization chamber during a flame-extinguishing stage to quickly decrease the temperature of the liquid fuel in the vaporization chamber, reducing an amount of a vaporized fuel outputted to the burner, thereby realizing quick flame extinguishment. The present invention further provides a fireplace.

The present invention provides a fireplace flame-extinguishing method, including the following steps: S1: when a shutdown command is received, stopping a heating element from heating a liquid fuel in a vaporization chamber of a vaporization device; and S2: injecting a liquid fuel having a temperature lower than a boiling point of the liquid fuel into the vaporization chamber of the vaporization device, to decrease a temperature of the liquid fuel in the vaporization chamber below the boiling point of the liquid fuel. According to the present invention, the liquid fuel having the temperature lower than the boiling point of the liquid fuel is injected into the vaporization chamber during a flame-extinguishing stage to quickly decrease the temperature of the liquid fuel in the vaporization chamber, reducing an amount of a vaporized fuel outputted to the burner, thereby realizing quick flame extinguishment. The present invention further provides a fireplace.

Automated systems and methods are provided for continuous monitoring of the flaring of waste gas at an industrial facility, which employ an RGB camera operably coupled to a gateway device by a data communication interface. The RGB camera is configured to capture time-series color image frames of a flare and communicate the time-series color image frames to the gateway device. The gateway device includes an image processing module and a flare optimization module executing on the gateway device. The image processing module is configured to process the time-series color image frames to determine at least one flare parameter that provides a qualitative measurement of the combustion efficiency of the flare over time. The flare optimization module is configured to adjust relative amount of waste gas to at least one assist gas for the flare based on the at least one flare parameter to continuously optimize the combustion efficiency of the flare.