A system is provided with a turbine combustor having a first diffusion fuel nozzle, wherein the first diffusion fuel nozzle has first and second passages that separately inject respective first and second flows into a chamber of the turbine combustor to produce a diffusion flame. The first flow includes a first fuel and a first diluent, and the second flow includes a first oxidant. The system includes a turbine driven by combustion products from the diffusion flame in the turbine combustor. The system also includes an exhaust gas compressor, wherein the exhaust gas compressor is configured to compress and route an exhaust gas from the turbine to the turbine combustor along an exhaust recirculation path.

A combustion method for controlling and monitoring exhaust gas emissions in boilers is provided. The combustion method comprises the following steps: providing a liquid fuel in a boiler, burning the liquid fuel under atmospheric pressure; measuring a first combustion temperature in the boiler, and monitoring an initial concentration of a first exhaust gas in the boiler; adding a combustion improver to the boiler in batches and monitoring an emission concentration of the first exhaust gas in the boiler, wherein the emission concentration is less than the initial concentration; and repeating the above steps, and monitoring the boiler until a second combustion gas is generated, stop adding the combustion improver, and measuring the temperature in the boiler as a second combustion temperature, and reducing the amount of the combustion improver to avoid the generation of the second exhaust gas.

A system is provided with a turbine combustor having a first diffusion fuel nozzle, wherein the first diffusion fuel nozzle is configured to produce a diffusion flame. The system includes a turbine driven by combustion products from the diffusion flame in the turbine combustor. The system also includes an exhaust gas compressor, wherein the exhaust gas compressor is configured to compress and route an exhaust gas from the turbine to the turbine combustor along an exhaust recirculation path. In addition, the system includes a first catalyst unit disposed along the exhaust recirculation path.

A burner for producing synthesis gas by partial oxidation of liquid or gaseous, carbon-containing fuels in the presence of an oxygen-containing oxidant and a moderator, which burner can be operated uncooled, i.e. without a fluid coolant being passed through the burner, is proposed. Steam or carbon dioxide or else mixtures of these materials are used as moderator. This is achieved by the feed channels being configured so that mixing of the fuel, the moderator and the oxidant occurs only outside the burner.

A system is provided with a turbine combustor having a first diffusion fuel nozzle, wherein the first diffusion fuel nozzle has first and second passages that separately inject respective first and second flows into a chamber of the turbine combustor to produce a diffusion flame. The first flow includes a first fuel, and the second flow includes a first oxidant and a first diluent. The system includes a turbine driven by combustion products from the diffusion flame in the turbine combustor. The system also includes an exhaust gas compressor, wherein the exhaust gas compressor is configured to compress and route an exhaust gas from the turbine to the turbine combustor along an exhaust recirculation path.

A gas turbine combustor includes a tubular combustion liner that has a plurality of dilution holes disposed circumferentially at a section downstream in a direction of flow of combustion gas, a combustor casing that encloses the combustion liner, a liner flow sleeve disposed between the combustion liner and the combustor casing, to define with the combustion liner an air flow path through which compressed air flows, the liner flow sleeve having a plurality of steam injection holes, and a steam distribution mechanism disposed on an outer peripheral side of the liner flow sleeve. The steam distribution mechanism distributes received injection steam to the steam injection holes. At least some of the steam injection holes are disposed so to face at least some of the dilution holes. The steam injection holes facing the respective dilution holes are each formed so as to spurt the injection steam toward the corresponding dilution hole.

A combustion chamber (steam booster) system for burning hydrogen with the aim of heating a flow of steam and/or of increasing the steam states of the hydrogen, and a method and a plant. In the combustion chamber system, hydrogen and preferably oxygen can be burned in the presence of water and/or water vapor in a combustion chamber, steam can flow around the combustion chamber on the outside in an intermediate space, in particular can flow over the entire length of the combustion chamber in the intermediate space of a flame tube.

An assembly is provided for a turbine engine. This assembly includes a combustor, a fuel injector nozzle and a fuel system. The combustor includes a combustion chamber. The fuel injector nozzle is configured to inject a fuel-steam mixture into the combustion chamber for combustion. The fuel system includes a fuel source, a steam source and a manifold. The manifold is configured to mix fuel received from the fuel source with steam received from the steam source to provide the fuel-steam mixture. The fuel system is configured to deliver the fuel-steam mixture to the fuel injector nozzle.

A conduit is preheated with steam having steam drain valve(s) therein open to allow draining and control valve(s) therein closed to prevent steam downstream flow. A gas may backfill the conduit from a downstream gas source to further preheat, and gas drain valve(s) may be provided to drain the gas. A predicted exit temperature of the steam or gas for a respective drain valve is calculated using a linear regression model based on initial temperature and pressure of the steam or gas and a Joule-Thompson cooling effect for the steam or gas at the respective drain valve. The preheating is stopped for the respective section of conduit when one or a combination of the predicted exit temperatures is greater than or equal to a respective required exit temperature of the steam or gas at a respective drain valve. The system sequentially ensures adequate preheating of sections of the conduit.

Disclosed is a staged-air burner device capable of high energy efficiency, high flame stability, combusting multiple readily switchable fuels ranging from pure hydrogen, to any hydrogen/methane mixture, to pure methane, and generating a low level of NOx. The burner device can include: a primary air chamber receiving a primary air and a flue gas; a burner tube capable of receiving a fuel jet and drawing in the air-flue gas mixture from the primary air chamber; a burner tip discharging the fuel-air-flue gas mixture formed in the burner tube to a first combustion zone and a second combustion zone via center orifices and side orifices on the burner tip, respectively; and a staged air chamber receiving staged air and discharging it via staged air ports into a third combustion zone. Combustion of the fuel occurs in at least one of the first, second, and third combustion zones.