scholarly journals Development of a 1300.DEG.C.-class gas turbine combustor burning coal-derined low BTU gaseous fuels. 2nd Report, Low NOx combustion technology by rich-lean combustion.

1990 ◽  
Vol 56 (532) ◽  
pp. 3903-3909 ◽  
Author(s):  
Mikio SATO ◽  
Toru NINOMIYA ◽  
Toshio ABE ◽  
Toshiyuki YOSHINE ◽  
Hiroshi HASEGAWA
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Combustor ◽  
Gaseous Fuels ◽  
Lean Combustion ◽  
Combustion Technology ◽  
Low Nox Combustion ◽  
Burning Coal

A Study of Low NOx Combustion in Medium-Btu Fueled 1300 °C-Class Gas Turbine Combustor in IGCC

1998 ◽  
Author(s):  
Takeharu Hasegawa ◽  
Tohru Hisamatsu ◽  
Yasunari Katsuki ◽  
Mikio Sato ◽  
Masahiko Yamada ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Natural Gas ◽  
Gas Turbine ◽  
Thermal Efficiency ◽  
Gas Turbine Combustor ◽  
Entrained Flow ◽  
Coal Gasifier ◽  
Combustion Technology ◽  
Low Nox Combustion ◽  
Co Emission

The development of integrated coal gasification combined cycle (IGCC) systems ensures cost-effective and environmentally sound options for supplying future coal utilizing power generation needs. The Japanese government and the electric power industries in Japan promoted research and development of an IGCC system using an air-blown entrained-flow coal gasifier. We worked on developing a low-Btu fueled gas turbine combustor to improve the thermal efficiency of the IGCC by raising the inlet-gas temperature of gas turbine. On the other hand, Europe and the United States are now developing the oxygen-blown IGCC demonstration plants. Coal gasified fuel produced in an oxygen-blown entrained-flow coal gasifier, has a calorific value of 8.6MJ/m 3 which is one fifth that of natural gas. However, the adiabatic flame temperature of oxygen-blown medium-Btu coal gaseous fuel is higher than that of natural gas and so NOx production from nitrogen fixation is expected to increase significantly. In the oxygen-blown IGCC system, a surplus nitrogen in quantity is produced in the oxygen-production unit. When nitrogen premixed with coal gasified fuel is injected into the combustor, the power to compress nitrogen increases. A low NOx combustion technology which is capable of decreasing the power to compress nitrogen is a significant advance in gas turbine development with an oxygen-blown IGCC system. We have started to develop a low NOx combustion technology using medium-Btu coal gasified fuel produced in the oxygen-blown IGCC process. In this paper, the effect of nitrogen injected directly into the combustor on the thermal efficiency of the plant is discussed. A 1300 °C-class gas turbine combustor with a swirling nitrogen injection function designed with a stable and low NOx combustion technology was constructed and the performance of this combustor was evaluated under atmospheric pressure conditions. Analyses confirmed that the thermal efficiency of the plant improved by 0.2 percent (absolute), compared with a case where nitrogen is premixed with coal gasified fuel before injection into the combustor. Moreover, this new technique which injects nitrogen directly into the high temperature region in the combustor results in a significant reduction in NOx production from nitrogen fixation. We estimate that CO emission concentration decreases to a significant level under high pressure conditions, while CO emission concentration in contrast to NOx emission rises sharply with increases in quantity of nitrogen injected into the combustor.

scholarly journals Development of a 1300.DEG.C.-class gas turbine combustor burning coal-derived low-BTU gaseous fuels.

1990 ◽  
Vol 56 (530) ◽  
pp. 3147-3154 ◽  
Author(s):  
Mikio SATO ◽  
Toshihiko NAKATA ◽  
Toshiyuki YOSHINE ◽  
Masahiko YAMADA
Keyword(s):  
Gas Turbine ◽  
Gas Turbine Combustor ◽  
Gaseous Fuels ◽  
Burning Coal

scholarly journals Rich-Quench-Lean Combustion for Multiple Fuels

1996 ◽  
Author(s):  
Dennis M. Bachovchin ◽  
William F. Domeracki
Keyword(s):  
High Temperature ◽  
Natural Gas ◽  
Gas Turbine ◽  
Current Status ◽  
Operating Characteristics ◽  
Gas Turbine Combustor ◽  
Fuel Gas ◽  
Gaseous Fuels ◽  
Lean Combustion ◽  
Design Basis

Westinghouse has developed a rich-quench-lean gas turbine combustor for use on multiple gaseous fuels. The design is based on variants of the Multi-Annular Swirl Burner (MASB) that was invented as a low-NOx topping combustor for the second generation PFBC process, utilizing high temperature vitiated air and high temperature NH3-rich fuel gas, both derived from coal. This Westinghouse RQL combustor is also capable of low-NOx performance using either natural gas or propane in vitiated air, as well as compressor air operation using syngas (coal- or biomass-derived fuel gas for IGCC), propane, or natural gas. The current status of the Westinghouse RQL combustor with regard to each such application is discussed, including design basis, design status, test experience, and expected emissions and operating characteristics.

scholarly journals Coal Gaseous Fueled, Low Fuel-NOx Gas Turbine Combustor

1990 ◽  
Author(s):  
M. Sato ◽  
T. Ninomiya ◽  
T. Nakata ◽  
T. Yoshine ◽  
M. Yamada ◽  
...  
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Coal Gasification ◽  
Combustion Method ◽  
Combined Cycle ◽  
Gas Turbine Combustor ◽  
Lean Combustion ◽  
Combustion Technology ◽  
Fuel Nox

From the view point of future coal utilization technology for the thermal power generation systems, the coal gasification combined cycle system has drawn special interest recently. In the coal gasification combined cycle power generation system, it is necessary to develop a high temperature gas turbine combustor using a low–BTU gas (LBG) which has high thermal efficiency and low emissions. In Japan a development program on the coal gasification combined cycle power generation system has started in 1985 by the national government and Japanese electric companies. In this program, is planned to develop the 1300 °C class gas turbines. However, in the case of using a hot type fuel gas cleaning system, the coal gas fuel to be supplied to gas turbines will contain ammonia. Ammonia will be converted to nitric oxides in the combustion process in gas turbines. Therefore, low fuel–NOx combustion technology is one of the most important research subjects. This paper describes low fuel–NOx combustion technology for 1300 °C class gas turbine combustor using low BTU coal gas fuel. Authors have showed that the rich–lean combustion method is effective to decrease fuel–NOx (1). In general in rich–lean combustion method, the fuel–NOx decreases, as the primary zone becomes richer. But flameholding becomes very difficult in even rich primary zone. For this reason this combustor was designed to have a flameholder with pilot flame. Combustion tests were conducted by using a full scale combustor used in 150 MW gas turbine at the atmospheric pressure condition.

Combustion Technology for Low-Emissions Gas-Turbines: Some Recent Modeling Results

1996 ◽  
Vol 118 (3) ◽  
pp. 201-208 ◽  
Author(s):  
S. M. Correa ◽  
I. Z. Hu ◽  
A. K. Tolpadi
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Spectroscopic Data ◽  
Physical Models ◽  
Gas Turbine Combustor ◽  
Finite Rate ◽  
Recent Developments ◽  
Combustion Technology ◽  
Computationally Intensive ◽  
Transport Method

Computer modeling of low-emissions gas-turbine combustors requires inclusion of finite-rate chemistry and its intractions with turbulence. The purpose of this review is to outline some recent developments in and applications of the physical models of combusting flows. The models reviewed included the sophisticated and computationally intensive velocity-composition pdf transport method, with applications shown for both a laboratory flame and for a practical gas-turbine combustor, as well as a new and computationally fast PSR-microstructure-based method, with applications shown for both premixed and nonpremixed flames. Calculations are compared with laserbased spectroscopic data where available. The review concentrates on natural-gas-fueled machines, and liquid-fueled machines operating at high power, such that spray vaporization effects can be neglected. Radiation and heat transfer is also outside the scope of this review.

scholarly journals The Effect of Discrete Pilot Hydrogen Dopant Injection on the Lean Blowout Performance of a Model Gas Turbine Combustor

1999 ◽  
Author(s):  
Oanh Nguyen ◽  
Scott Samuelsen
Keyword(s):  
Gas Turbine ◽  
Atmospheric Pressure ◽  
Gas Turbines ◽  
Nox Emissions ◽  
Gas Turbine Combustor ◽  
Lean Blowout ◽  
Lean Combustion ◽  
Attractive Option ◽  
Overall Performance ◽  
Model Gas Turbine Combustor

In view of increasingly stringent NOx emissions regulations on stationary gas turbines, lean combustion offers an attractive option to reduce reaction temperatures and thereby decrease NOx production. Under lean operation, however, the reaction is vulnerable to blowout. It is herein postulated that pilot hydrogen dopant injection, discretely located, can enhance the lean blowout performance without sacrificing overall performance. The present study addresses this hypothesis in a research combustor assembly, operated at atmospheric pressure, and fired on natural gas using rapid mixing injection, typical of commercial units. Five hydrogen injector scenarios are investigated. The results show that (1) pilot hydrogen dopant injection, discretely located, leads to improved lean blowout performance and (2) the location of discrete injection has a significant impact on the effectiveness of the doping strategy.

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