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Title: Sectoral combustor for burning low-BTU fuel gas

Abstract

A high-temperature combustor for burning low-BTU coal gas in a gas turbine is disclosed. The combustor includes several separately removable combustion chambers each having an annular sectoral cross section and a double-walled construction permitting separation of stresses due to pressure forces and stresses due to thermal effects. Arrangements are described for air-cooling each combustion chamber using countercurrent convective cooling flow between an outer shell wall and an inner liner wall and using film cooling flow through liner panel grooves and along the inner liner wall surface, and for admitting all coolant flow to the gas path within the inner liner wall. Also described are systems for supplying coal gas, combustion air, and dilution air to the combustion zone, and a liquid fuel nozzle for use during low-load operation. The disclosed combustor is fully air-cooled, requires no transition section to interface with a turbine nozzle, and is operable at firing temperatures of up to 3000.degree. F. or within approximately 300.degree. F. of the adiabatic stoichiometric limit of the coal gas used as fuel.

Inventors:
 [1]
  1. Schenectady, NY
Issue Date:
Research Org.:
General Electric Co., Boston, MA (United States)
OSTI Identifier:
863732
Patent Number(s):
4236378
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F23 - COMBUSTION APPARATUS F23R - GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
DOE Contract Number:  
EX-76-C-01-1806
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
sectoral; combustor; burning; low-btu; fuel; gas; high-temperature; coal; turbine; disclosed; separately; removable; combustion; chambers; annular; section; double-walled; construction; permitting; separation; stresses; due; pressure; forces; thermal; effects; arrangements; described; air-cooling; chamber; countercurrent; convective; cooling; flow; outer; shell; wall; inner; liner; film; panel; grooves; surface; admitting; coolant; path; systems; supplying; air; dilution; zone; liquid; nozzle; low-load; operation; air-cooled; requires; transition; interface; operable; firing; temperatures; 3000; degree; approximately; 300; adiabatic; stoichiometric; limit; burning low-btu; pressure forces; fuel nozzle; low-btu coal; wall surface; turbine nozzle; inner liner; outer shell; fuel gas; combustion zone; combustion chamber; gas turbine; coolant flow; combustion air; liquid fuel; coal gas; transition section; sectoral combustor; shell wall; thermal effects; combustion chambers; stresses due; cooling flow; convective cooling; gas path; low-btu fuel; high-temperature combustor; btu coal; btu fuel; /60/

Citation Formats

Vogt, Robert L. Sectoral combustor for burning low-BTU fuel gas. United States: N. p., 1980. Web.
Vogt, Robert L. Sectoral combustor for burning low-BTU fuel gas. United States.
Vogt, Robert L. Tue . "Sectoral combustor for burning low-BTU fuel gas". United States. https://www.osti.gov/servlets/purl/863732.
@article{osti_863732,
title = {Sectoral combustor for burning low-BTU fuel gas},
author = {Vogt, Robert L},
abstractNote = {A high-temperature combustor for burning low-BTU coal gas in a gas turbine is disclosed. The combustor includes several separately removable combustion chambers each having an annular sectoral cross section and a double-walled construction permitting separation of stresses due to pressure forces and stresses due to thermal effects. Arrangements are described for air-cooling each combustion chamber using countercurrent convective cooling flow between an outer shell wall and an inner liner wall and using film cooling flow through liner panel grooves and along the inner liner wall surface, and for admitting all coolant flow to the gas path within the inner liner wall. Also described are systems for supplying coal gas, combustion air, and dilution air to the combustion zone, and a liquid fuel nozzle for use during low-load operation. The disclosed combustor is fully air-cooled, requires no transition section to interface with a turbine nozzle, and is operable at firing temperatures of up to 3000.degree. F. or within approximately 300.degree. F. of the adiabatic stoichiometric limit of the coal gas used as fuel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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