Advanced Hot Gas Cleaning System for Coal Gasification Processes

1993 ◽  
Author(s):  
R. A. Newby ◽  
R. L. Bannister
Keyword(s):  
United States ◽  
Power Generation ◽  
Coal Gasification ◽  
The United States ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Cleaning System ◽  
Hot Gas Cleaning

The United States electric industry is entering a period where growth and the aging of existing plants will mandate a decision on whether to repower, add capacity or do both. The power generation cycle of choice, today, is the combined cycle that utilizes the Brayton and Rankine cycles. The combustion turbine in a combined cycle can be used in a repowering mode or in a greenfield plant installation. Today’s fuel of choice for new combined cycle power generation is natural gas. However, due to a 300-year supply of coal within the United States, the fuel-of-the future will include coal. Westinghouse has supported the development of coal-fueled gas turbine technology over the past thirty years. Working with the U.S. Department of Energy and other organizations, Westinghouse is actively pursuing the development and commercialization of several coal-fueled processes. To protect the combustion turbine and environment from emissions generated during coal conversion (gasification/combustion) a gas cleanup system must be used. This paper reports on the status of fuel gas cleaning technology and describes the Westinghouse approach to developing an advanced hot gas cleaning system that contains component systems that remove particulate, sulfur, and alkali vapors. The basic process uses ceramic barrier filters for multiple cleaning functions.

Advanced Hot Gas Cleaning System for Coal Gasification Processes

1994 ◽  
Vol 116 (2) ◽  
pp. 338-344 ◽  
Author(s):  
R. A. Newby ◽  
R. L. Bannister
Keyword(s):  
United States ◽  
Power Generation ◽  
Coal Gasification ◽  
The United States ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Cleaning System ◽  
Hot Gas Cleaning

The United States electric industry is entering a period where growth and the aging of existing plants will mandate a decision on whether to repower, add capacity, or do both. The power generation cycle of choice, today, is the combined cycle that utilizes the Brayton and Rankine cycles. The combustion turbine in a combined cycle can be used in a repowering mode or in a greenfield plant installation. Today’s fuel of choice for new combined cycle power generation is natural gas. However, due to a 300-year supply of coal within the United States, the fuel of the future will include coal. Westinghouse has supported the development of coal-fueled gas turbine technology over the past thirty years. Working with the U.S. Department of Energy and other organizations, Westinghouse is actively pursuing the development and commercialization of several coal-fueled processes. To protect the combustion turbine and environment from emissions generated during coal conversion (gasification/combustion) a gas cleanup system must be used. This paper reports on the status of fuel gas cleaning technology and describes the Westinghouse approach to developing an advanced hot gas cleaning system that contains component systems that remove particulate, sulfur, and alkali vapors. The basic process uses ceramic barrier filters for multiple cleaning functions.

A Review of the Efficacy of Silicon Carbide Hot-Gas Filters in Coal Gasification and Pressurized Fluidized Bed Combustion Environments

1996 ◽  
Vol 118 (3) ◽  
pp. 500-506 ◽  
Author(s):  
R. R. Judkins ◽  
D. P. Stinton ◽  
J. H. DeVan
Keyword(s):  
Silicon Carbide ◽  
Fluidized Bed ◽  
Coal Gasification ◽  
Relevant Literature ◽  
Combined Cycle ◽  
Fluidized Bed Combustion ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Hot Gas Cleaning ◽  
Pressurized Fluidized Bed Combustion

Reviews of relevant literature and interviews with individuals cognizant of the state of the art in ceramic filters for hot-gas cleaning were conducted. Thermodynamic calculations of the stability of various ceramic phases were also made. Based on these calculations, reviews, and interviews, conclusions were reached regarding the use of silicon carbide-based ceramics as hot-gas filter media. Arguments are presented that provide the basis for our conclusion that high-purity silicon carbide is a viable material in the integrated coal gasification combined cycle (IGCC) and pressurized fluidized-bed combustion (PFBC) environments we examined. Clay-bonded materials are, we concluded, suspect for these applications, their extensive use not-withstanding. Operations data we reviewed focused primarily on clay-bonded filters, for which a great deal of experience exists. We used the clay-bonded filter experience as a point of reference for our review and analysis.

A Review of the Efficacy of Silicon Carbide Hot Gas Filters in Coal Gasification and Pressurized Fluidized Bed Combustion Environments

1994 ◽  
Author(s):  
Roddie R. Judkins ◽  
David P. Stinton ◽  
Jackson H. DeVan
Keyword(s):  
Silicon Carbide ◽  
Fluidized Bed ◽  
Coal Gasification ◽  
Relevant Literature ◽  
Combined Cycle ◽  
Fluidized Bed Combustion ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Hot Gas Cleaning ◽  
Pressurized Fluidized Bed Combustion

Reviews of relevant literature and interviews with individuals cognizant of the state-of-the-art in ceramic filters for hot-gas cleaning were conducted. Thermodynamic calculations of the stability of various ceramic phases were also made. Based on these calculations, reviews, and interviews, conclusions were reached regarding the use of silicon carbide-based ceramics as hot-gas filter media. Arguments are presented that provide the basis for our conclusion that high-purity silicon carbide is a viable material in the integrated coal gasification combined cycle (IGCC) and pressurized fluidized-bed combustion (PFBC) environments we examined. Clay-bonded materials are, we concluded, suspect for these applications, their extensive use notwithstanding. Operations data we reviewed focused primarily on clay-bonded filters, for which a great deal of experience exists. We used the clay-bonded filter experience as a point of reference for our review and analysis.

Development and Commercialization of Hot Gas Filters for Power Generation Applications

1995 ◽  
Author(s):  
Thomas E. Lippert ◽  
Richard A. Newby
Keyword(s):  
Power Generation ◽  
Field Test ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Fluidized Bed Combustion ◽  
Operating Characteristics ◽  
Hot Gas ◽  
And Performance ◽  
First And Second Generation

Westinghouse, with the Department of Energy (Morgantown Energy Technology Center), is developing hot gas particulate filters for application in advanced fossil energy power generation, i.e., pressurized fluidized bed combustion (PFBC) and coal gasification combined cycle (GCC). Westinghouse candle filter units are currently being operated in various coal based pilot plant and demonstration facilities (PFBC and GCC) to demonstrate their operating characteristics and performance and to identify potential commercial viability. Oxide and nonoxide filter materials, representing both first and second generation designs, are being tested and evaluated. In-house testing to characterize ash caking behavior is also being conducted in support of the field test programs. This paper summarizes this activity and presents current results of the field test programs.

Coal Gasification for Integrated Gasification Combined Cycle Power Generation

1988 ◽  
Vol 6 (6) ◽  
pp. 437-446 ◽  
Author(s):  
Toshi'ichi Takematsu
Keyword(s):  
Turbine Blade ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Fluidised Bed ◽  
Integrated Gasification Combined Cycle ◽  
Gas Cleaning ◽  
Blade Cooling ◽  
Hot Gas ◽  
Integrated Gasification ◽  
Hot Gas Cleaning

A number of coal gasifiers applicable to IGCC are under development or at the demonstration stage. These include moving bed, fluidised bed, entrained flow and molten bath types. The efficiency of an IGCC system increases as the temperature of the gas entering the turbine increases. Practical temperatures are currently limited by turbine blade materials and by the system used to clean the gas prior to entering the turbine. Work on hot gas cleaning systems, turbine blade materials and blade cooling techniques are under way. The main requirements of the gasification system are to provide a high temperature, high pressure gas with a minimum of impurities.

Reducing tar yield in gasification of paper-reject sludge by using a hot-gas cleaning system

Energy ◽  
2013 ◽  
Vol 50 ◽  
pp. 47-53 ◽  
Author(s):  
Kung-Yuh Chiang ◽  
Cheng-Han Lu ◽  
Ming-Hui Lin ◽  
Kuang-Li Chien
Keyword(s):  
Gas Cleaning ◽  
Hot Gas ◽  
Cleaning System ◽  
Hot Gas Cleaning

High-temperature fuel gas cleaning and removal of alkalis using molten slag

1998 ◽  
Vol 212 (3) ◽  
pp. 151-158 ◽  
Author(s):  
H W Gudenau ◽  
H Hoberg ◽  
A R Pande ◽  
M Weinberg ◽  
J-E Becker
Keyword(s):  
High Temperature ◽  
Molten Slag ◽  
Combined Cycle ◽  
Simultaneous Removal ◽  
Fuel Gas ◽  
Gas Cleaning ◽  
Hot Gas ◽  
Particulate Removal ◽  
Hot Gas Cleaning ◽  
Major Emphasis

Fuel gas cleaning is an important step in the development of coal-based combined cycle technologies. By integrating hot gas cleaning facilities in the combined cycle power plant, higher operating temperatures can be achieved. Research is being carried out at the Institute of Ferrous Metallurgy, Technical University of Aachen, to develop a process for gas cleaning at temperatures above 1300°C using a venturi scrubber with molten slags as sorbents. This process offers simultaneous removal of particulate matter and alkali vapours in the gas stream. The present paper deals with the particulate removal tests, with major emphasis on investigations carried out to study the reaction between molten slags of various compositions and alkali vapours. These investigations included thermochemical calculations as well as an experimental reaction study.

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