Utilization of Fluidized Bed Combustion in Energy Recovery from Solid Wastes

1980 ◽  
Vol 102 (3) ◽  
pp. 168-172 ◽  
Author(s):  
J. R. Hamm ◽  
D. L. Keairns
Keyword(s):  
Gas Turbine ◽  
Fluidized Bed ◽  
Energy Recovery ◽  
Combustion Process ◽  
Combined Cycle ◽  
Solid Wastes ◽  
Space Heating ◽  
Closed Cycle ◽  
Fluidized Bed Combustion ◽  
Near Term

Fluidized bed combustion is capable of utilizing a wider variety of fuels (including solid wastes) than is any other combustion process. Thus, it has the potential for wide application in systems for recovering energy from solid wastes in industry, commercial sites, institutions, forestry, and agriculture to produce electric power, process steam, process heat, and space heating. Three fluidized bed combustion concepts are identified for near-term application: atmospheric fluidized bed boiler, exhaust-heated gas turbine or combined cycle, and closed-cycle gas turbine.

scholarly journals Modified Combined Cycle With Pressure Fluidized Bed Combustion Boiler

1992 ◽  
Author(s):  
Jacek Dzierzgowski ◽  
Stanislaw Sobkowski
Keyword(s):  
Combustion Chamber ◽  
Gas Turbine ◽  
Fluidized Bed ◽  
Flue Gas ◽  
Thermal Efficiency ◽  
Combined Cycle ◽  
The Other ◽  
Fluidized Bed Combustion ◽  
Air Stream ◽  
Gas Turbine Compressor

The article describes conversion of conventional steam cycle with 200 MW turbine into combined steam-gas cycle with pressure fluidized bed combustion boiler. In order to raise cycle thermal efficiency an additional combustion chamber before a gas turbine was introduced. Two modifications of the combined cycle were considered. In one of them natural gas in the additional combustion chamber is burnt with the boiler flue gas only. In the other gas is burnt with additional air stream taken from behind the gas turbine compressor. Optimizing calculations of the cycle thermal efficiency in function of some cycle’s main parameters were carried out.

Assessment of Hot Gas Clean-Up Systems and Turbine Erosion/Corrosion Problems in Pfbc Combined Cycle Systems

1980 ◽  
Vol 102 (2) ◽  
pp. 468-475 ◽  
Author(s):  
J. Stringer ◽  
S. Ehrlich ◽  
W. W. Slaughter ◽  
A. C. Dolbec
Keyword(s):  
Gas Turbine ◽  
Fluidized Bed ◽  
Elevated Pressure ◽  
Combined Cycle ◽  
Alternative Methods ◽  
Inlet Temperature ◽  
Fluidized Bed Combustion ◽  
Combustion Gases ◽  
Hot Gas ◽  
Particulate Removal

Alternative methods of producing electricity from coal while maintaining acceptable environmental standards are currently being examined in detail. One such method involves the fluidized bed combustion of coal at elevated pressure, using an acceptor in the fluidized bed to remove the sulfur. Steam is raised using heat exchangers within and above the bed, and the hot combustion gases are expanded through a gas turbine. A serious limitation on this system is the ability to reduce the particulate loading in the combustion gases to a level at which a gas turbine having acceptable life can be constructed. The turbine may be either a new design or a modification of a currently available engine, and palliatives include lowering the turbine inlet temperature, lowering the gas velocity through the turbine, and “hardening” the turbine by the selection of appropriate materials or claddings for the vanes and blades. In this paper, the various degradation processes are considered, with emphasis on erosion, and the probable limits of particulate loading in the gas stream are estimated. These estimates are discussed in relation to existing hot gas particulate removal systems, and directions for further study are suggested.

scholarly journals Benefits of Solar/Fossil Hybrid Gas Turbine Systems

1979 ◽  
Author(s):  
H. S. Bloomfield
Keyword(s):  
Power Systems ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Brayton Cycle ◽  
Fuel Saving ◽  
Operational Mode ◽  
Fuel Savings ◽  
Cycle Systems ◽  
Potential Benefits ◽  
Near Term

The potential benefits of solar/fossil hybrid gas turbine power systems were assessed. Both retrofit and new systems were considered from the aspects of: cost of electricity, fuel conservation, operational mode, technology requirements, and fuels flexibility. Hybrid retrofit (repowering) of existing combustion (simple Brayton cycle) turbines can provide near-term fuel savings and solar experience, while new and advanced recuperated or combined-cycle systems may be an attractive fuel saving and economically competitive vehicle to transition from today’s gas- and oil-fired powerplants to other more abundant fuels.

Lignite-Fired Combined Cycle Power Plant With ACPFBC: Concept and Thermodynamic Calculations

2003 ◽  
Author(s):  
Hans Joachim Krautz ◽  
Rolf Chalupnik ◽  
Franz Stuhlmu¨ller
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Fluidized Bed ◽  
Waste Heat ◽  
Ambient Air ◽  
Basic Function ◽  
Combined Cycle ◽  
Thermodynamic Calculations ◽  
Test Plant ◽  
Coal Conversion

A 200 kWth test plant was constructed by BTU Cottbus for the purpose of developing a special variant of coal conversion based on 2nd generation PFBC. This concept, primarily to be used for generating power from lignite, employs a circulating type fluidized bed and is characterized by a design that combines the two air-blown steps “partial gasification” and “residual char combustion” in a single component. The subject of this paper is to develop an overall power plant concept based on this process, and to perform the associated thermodynamic calculations. In addition to the base concept with one large heavy-duty Siemens gas turbine V94.3A fired with Lausitz dried lignite (19% H2O), further versions with variation of Siemens gas turbine model (V94.3A and V64.3A), the water content of the fuel fired (raw lignite with more than 52% H2O or dried lignite) as well as the method of drying the coal were investigated. Common assumptions for all versions were ISO conditions for the ambient air and a condenser pressure of 0.05 bar. As expected, the calculations yielded very attractive net efficiencies of almost 50% (LHV based) for a variant with the small V64.3A gas turbine and up to more than 55% for the large plants with the V94.3A gas turbine. It was further demonstrated that thermodynamic integration of an advanced, innovative coal drying process (e.g. fluidized-bed drying with waste heat utilization) causes an additional gain in net efficiency of about three percentage points compared with the variant of firing lignite that was first dried externally. In addition to the basic function of the coal conversion system, it was necessary to also assume preconditions such as complete carbon conversion, reliable hot gas cleaning facilities and fuel gas properties that are acceptable for combustion in the gas turbine. Put abstract text here.

Design of a Pressurized Fluid Bed Coal Fired Combined Cycle Electric Power Generation Plant

1978 ◽  
Author(s):  
S. Moskowitz ◽  
G. Weth
Keyword(s):  
Electric Power ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Combustion Process ◽  
Combined Cycle ◽  
Department Of Energy ◽  
Process Selection ◽  
Process Technology ◽  
Fluid Bed ◽  
Plant Efficiency

The combination of pressurized fluidized bed (PFB) technology and the gas turbine - steam turbine combined-cycle power system offer a unique opportunity for the production of electric power at increased plant efficiency from the direct combustion of high sulfur coal and that is environmentally acceptable without stack gas cleanup. The concept offers the prospect of earlier commercialization than those systems requiring gasification or liquefication of coal to clean fels. This paper presents the design of a 500-MW commercial powerplant prepared in conjunction with the U.S. Department of Energy sponsored program for the design, construction, and operation of a coal-fired PFB/turbine electric pilot plant. The powerplant approach develops over 60 percent of the plant capacity by multiple gas turbine gas turbine-generators and the balance of the capacity by a steam turbine-generator. The paper describes the fluid bed process selection of an air heater cycle. With two-thirds of the compressor discharge air indirectly heated within an in-bed gas-to-air heat exchanger and one-third of the compressor air involved in the combustion process, technology requirements for hot gas cleanup and turbine protection are minimized. This approach, which offers a coal-pile-to-busbar plant efficiency of over 40 percent is superior to other concepts and contemporary plants in terms of plant arrangement flexibility, part-load performance, power availability, and provides a low risk in development toward commercialization in the 1980’s.

Design of a 6- by 6-Foot Coal-Fired Heater for a CCGT Air Heater

1982 ◽  
Author(s):  
L. H. Russell ◽  
J. Campbell
Keyword(s):  
Gas Turbine ◽  
Fluidized Bed ◽  
Atmospheric Pressure ◽  
Coal Combustion ◽  
Department Of Energy ◽  
Working Fluid ◽  
Design Rationale ◽  
Closed Cycle ◽  
Cogeneration System ◽  
The U.S

The U.S. Department of Energy is sponsoring a program of research and development on coal-fired heaters to provide heat input to the working fluid of a closed-cycle gas turbine/cogeneration system. One of the fired heater concepts being researched employs the atmospheric pressure fluidized bed coal combustion concept. This paper describes a research oriented atmospheric fluidized bed of 6- by 6-foot plan dimensions that has been designed and is being constructed for utilization during the R&D program. The design rationale is presented, details of the more significant details are described and discussed, and the planned methods for utilizing the 6- by 6-foot AFB as a research tool are presented.

Influences of secondary gas injection pattern on fluidized bed combustion process: A CFD-DEM study

Fuel ◽  
2020 ◽  
Vol 268 ◽  
pp. 117314 ◽  
Author(s):  
Chenshu Hu ◽  
Kun Luo ◽  
Mengmeng Zhou ◽  
Junjie Lin ◽  
Dali Kong ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Gas Injection ◽  
Combustion Process ◽  
Fluidized Bed Combustion
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