General Electric Company

David Kelly Moyeda

Wei Zhou

Roy Payne

Larry Swanson

Antonio Marquez

Boris Nickolaevich Eiteneer

Guang Xu

Honggang Wang

Yao Liang Chen

Robert Warren Taylor

Peter Martin Maly

Chayan Mitra

Neil Colin Widmer

David Michael Chapin

Rachit Sharma

Eric YuHang Fung

Tian Xuan Zhang

Zhilin Wu

Lihan He

Anish Bekal

Arun Kumar Sridharan

Xu Guang

Santosh Nareddy

Larry William Swanson

A method for combustion tuning, comprises collecting exhaust parameters indicating combustion status of a boiler by a sensor array; determining whether the exhaust parameters of the boiler match a preset optimization target; and optimizing combustion, if the exhaust parameters do not match the preset optimization target by selecting a model from a model repository based on a current boiler condition, wherein the model corresponds to a relationship between model input variables and the exhaust parameters; determining at least one optimized model input variable of the boiler for realizing the optimization target, based on the selected model; and adjusting actuators of the boiler according to the optimized model input variable.

System and method for combustion tuning

One or more light sources emit light within first, second, and third wavelength ranges through exhaust gas. The first and second wavelength ranges are characterized by first and second different absorption wavelength ranges of a background gas. The third wavelength range is characterized by an absorption wavelength range of a gas-of-interest. At least some of the light within the first, second, and third wavelength ranges is absorbed by the exhaust gas thereby providing modified light characterized by the first, second, and third absorption wavelength ranges. One or more detectors receive the modified light. A processing subsystem determines a temperature of the exhaust gas based on the modified light characterized by the first and second absorption wavelength ranges and a concentration of the gas-of-interest based on the modified light characterized by the third absorption wavelength range and the temperature of the exhaust gas.

Gas detector and method of detection

Systems and methods for analyzing combustion system operation are provided. According to one embodiment, a method can include receiving multiple CO measurements from respective CO sensors distributed within a combustion system; receiving multiple Omeasurements from respective Osensors distributed within the combustion system; and determining at least one operating condition of the combustion system based at least in part on CO indicated by the CO measurements relative to Oindicated by the Omeasurements.

Methods and systems for analyzing combustion system operation

A method for reducing the emissions from combustion gases produced during a combustion process includes injecting a hydrocarbon-based reducing agent into the combustion gases to form a combustion gas mixture. The combustion gas mixture including oxides of nitrogen, NO, is directed through a selective catalyst reduction (SCR) system including a catalyst bed to remove NOfrom the combustion gas mixture and to produce an exhaust gas. In one embodiment, the exhaust gases are released from the SCR to the atmosphere.

Apparatus for a nitrogen purge system

An apparatus to introduce a reagent to reduce nitrogen oxides in flue gas including: nozzles mounted to a passage for the flue gas, wherein the nozzles are mounted downstream of a SNCR system and upstream of a SCR system, wherein the nozzles are mounted on one or more walls of the passage and are configured to inject a pressurized fluid into the flue gas; a source of the pressurized fluid which is in fluid communication with the nozzles such that the pressurized fluid flows to the nozzles; a source of a NOx reducing reagent and a mixing device which mixes the reagent with the pressurized fluid such that the pressurized fluid flowing to the nozzles includes the reagent.

Method and apparatus to inject reagent in SNCR/SCR emission system for boiler

Combustion systems having reduced nitrogen oxide emissions and methods of using the same are disclosed herein. In one embodiment, a combustion system is provided. The combustion system includes a combustion zone, which includes a burner for converting a fuel, under fuel rich conditions, to a flue gas. An intermediate staged air inlet is downstream from the combustion zone, for supplying intermediate staged air to the flue gas and producing fuel lean conditions. A reburn zone is downstream from the intermediate staged air inlet for receiving the flue gas. A process for using the combustion system and a method of reducing NOflowing into the reburn zone of a combustion system are also described herein.

Combustion systems and processes for burning fossil fuel with reduced nitrogen oxide emissions

A system includes an emissions control system. The emissions control system includes a chemical injection conduit. The emissions control system also includes a chemical injector coupled to the chemical injection conduit, wherein the chemical injector is configured to output an emissions control chemical into the chemical injection conduit. The emissions control system further includes a wave generator coupled to the chemical injection conduit, wherein the wave generator is configured to output multiple waves that propagate through the chemical injection conduit into a flow path of combustion products to drive improved mixing of the emissions control chemical with the combustion products.

System and method for controlling emissions in a combustion system

A method of decreasing a concentration of nitrogen oxides in a combustion gas flowing through a vessel including: generating a flue gas in a combustion zone of the vessel, the flue gas containing nitrogen oxides and carbon monoxide; providing overfire air into a burnout zone of the vessel from a first injector of overfire air to oxidize at least some of the carbon monoxide in the flue gas; injecting a selective reducing agent concurrent with overfire air at a level in the burnout zone downstream of the first injector of overfire air and downstream of the oxidization of the carbon monoxide, and reacting the selective reducing agent with the flue gas to reduce the nitrogen oxides.

Multi-compartment overfire air and N-agent injection method for nitrogen oxide reduction in flue gas

Multi-compartment overfire air and N-agent injection method and system for nitrogen oxide reduction in flue gas

Methods and systems for reducing the emissions from combustion gases

A method of decreasing the concentration of nitrogen oxides in a combustion gas flowing through a vessel including the steps of: generating a flue gas in a combustion zone of the vessel, the flue gas containing nitrogen oxides and carbon monoxide; providing overfire air into a burnout zone of the vessel from a first injector of the overfire air to oxidize at least some of the carbon monoxide in the flue gas; injecting a selective reducing agent concurrent with the overfire air at a level in the burnout zone downstream of the first injector of overfire air and downstream of the oxidization of the carbon monoxide; and reacting the selective reducing agent with the flue gas to reduce the nitrogen oxides.

Method for nitrogen oxide reduction in flue gas

Growing community of inventors

Laguna Hills, CA, United States of America

David Kelly Moyeda