Overview of Wet Flue Gas Desulphurisation System & Condensate Flow Study in view of new stringent environment regulations for fossil fuel based power plants in India

A thermoeconomic analysis of microalgae co-firing process for fossil fuel-fired power plants is studied. A process with closed photobioreactor and artificial illumination is evaluated for microalgae cultivation, due to its simplicity with less influence from climate variations. The results from this process would contribute to further estimation of process performance and investment. The concept of co-firing (coal-microalgae or natural gas-microalgae) includes the utilization of CO2 from power plant for microalgal biomass culture and oxy-combustion of using oxygen generated by biomass to enhance the combustion efficiency. As it reduces CO2 emission by recycling it and uses less fossil fuel, there are concomitant benefits of reduced GHG emissions. The by-products (oxygen) of microalgal biomass can be mixed with air or recycled flue gas prior to combustion, which will have the benefits of lower nitrogen oxide concentration in flue gas, higher efficiency of combustion, and not too high temperature (avoided by available construction materials) resulting from coal combustion in pure oxygen. Two case studies show that there are average savings about $0.386 million/MW/yr and $0.323 million/MW/yr for coal-fired and natural gas-fired power plants, respectively. These costs saving are economically attractive and demonstrate the promise of microalgae technology for reducing greenhouse gas (GHG) emission.

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96/06616 Flue gas desulfurization system for fossil fuel power plants

Fuel and Energy Abstracts ◽

10.1016/s0140-6701(97)83985-9 ◽

1996 ◽

Vol 37 (6) ◽

pp. 462

Keyword(s):

Flue Gas ◽

Power Plants ◽

Fossil Fuel ◽

Flue Gas Desulfurization ◽

Fossil Fuel Power Plants

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Technoeconomic Analysis of Microalgae Cofiring Process for Fossil Fuel-Fired Power Plants

Journal of Energy Resources Technology ◽

10.1115/1.4003729 ◽

2011 ◽

Vol 133 (1) ◽

Cited By ~ 7

Author(s):

Jian Ma ◽

Oliver Hemmers

Keyword(s):

Natural Gas ◽

Flue Gas ◽

Algal Biomass ◽

Power Plants ◽

Fossil Fuel ◽

Construction Materials ◽

Ghg Emissions ◽

Pure Oxygen ◽

Microalgal Biomass ◽

Technoeconomic Analysis

The concept of cofiring (algal biomass burned together with coal or natural gas in existing utility power boilers) includes the utilization of CO2 from power plant for algal biomass culture and oxycombustion of using oxygen generated by biomass to enhance the combustion efficiency. As it reduces CO2 emission by recycling it and uses less fossil fuel, there are concomitant benefits of reduced greenhouse gas (GHG) emissions. The by-products (oxygen) of microalgal biomass can be mixed with air or recycled flue gas prior to combustion, which will have the benefits of lower nitrogen oxide concentration in flue gas, higher efficiency of combustion, and not too high temperature (avoided by available construction materials) resulting from coal combustion in pure oxygen. A technoeconomic analysis of microalgae cofiring process for fossil fuel-fired power plants is studied. A process with closed photobioreactor and artificial illumination is evaluated for microalgae cultivation, due to its simplicity with less influence from climate variations. The results from this process would contribute to further estimation of process performance and investment. Two case studies show that there are average savings about $0.264 million/MW/yr and $0.203 million/MW/yr for coal-fired and natural gas-fired power plants, respectively. These cost savings are economically attractive and demonstrate the promise of microalgae technology for reducing GHG emission from fossil fuel-fired power plants.

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Microstructure of trona sorbents from fossil fuel plant full-scale dry injection tests

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100113202 ◽

1984 ◽

Vol 42 ◽

pp. 664-665

Author(s):

R. T. Greer ◽

D. T. Zhang

Keyword(s):

Flue Gas ◽

Power Plants ◽

Fossil Fuel ◽

Elevated Temperatures ◽

Economic Incentives ◽

Full Scale ◽

Phase Identification ◽

Gas Streams ◽

Injection Process ◽

Station Unit

The use of dry sorbents for the removal of SO2 from the flue gas of coal-fired power plants is of interest in reducing the complexity of SO2 removal and appears to offer economic incentives. In 1982, the Electric Power Research Institute, Public Service company of Colorado (PSCCO), and Multi-Mineral Corporation co-sponsored a full-scale demonstration of the dry injection process at the Cameo Station, Unit 1, of PSCCO near Grand Junction, Colorado.Laboratory comparative studies of nahcolite (NaHCO3), trona and soda ash Na2CO3) with that exposed to gas streams of air or of SO2 at elevated temperatures have been reported to provide microstructural data (from SEM) for correlation with microchemical information and phase identification for possible reactions of these materials which may occur under conditions for injection of a dry sorbent at the utility plant, and which may bear on the effectiveness of SO2 reaction with sorbents.

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CO2 capture from the flue gas of conventional fossil-fuel-fired power plants

Environmental Progress ◽

10.1002/ep.670130320 ◽

1994 ◽

Vol 13 (3) ◽

pp. 214-219 ◽

Cited By ~ 62

Author(s):

A. M. Wolsky ◽

E. J. Daniels ◽

B. J. Jody

Keyword(s):

Co2 Capture ◽

Flue Gas ◽

Power Plants ◽

Fossil Fuel

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95/05266 CO2 capture from the flue gas of conventional fossil-fuel-fired power plants

Fuel and Energy Abstracts ◽

10.1016/0140-6701(95)97002-2 ◽

1995 ◽

Vol 36 (5) ◽

pp. 368

Keyword(s):

Co2 Capture ◽

Flue Gas ◽

Power Plants ◽

Fossil Fuel

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Heat recovery from Combined Cycle Power Plants for Heat Pumps

E3S Web of Conferences ◽

10.1051/e3sconf/201911301011 ◽

2019 ◽

Vol 113 ◽

pp. 01011

Author(s):

Alberto Vannoni ◽

Alessandro Sorce ◽

Sven Bosser ◽

Torsten Buddenberg

Keyword(s):

Flue Gas ◽

Heat Recovery ◽

Power Plants ◽

Fossil Fuel ◽

Heat Pumps ◽

Combined Cycle ◽

Sensible Heat ◽

Heat Recovery Steam Generator ◽

Fossil Fuel Power Plants ◽

Base Load

Fossil fuel power plants, as combined cycle plants (CCGT), will increasingly have to shift their role from providing base-load power to providing fluctuating back-up power to control and stabilize the grid, but they also have to be able to run at the highest possible efficiency. Combined Heat and Power generation could be a smart solution to overcome the flexibility required to a modern power plant, this work investigates different layout possibilities allowing to increase the overall efficiency through the heat recover from the hot flue gasses after the heat recovery steam generator (HRSG) of a CCGT. The flue gas (FG) cooling aims to recover not only the sensible heat but also the latent heat by condensing the water content. One possible solution couples a heat pump to the flue gas condenser in order to increase the temperature at which the recovered heat is supplied, moreover the evaluated layout has to comply with the requirement of a minimum temperature before entering the stack.

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Could biomass-fueled boilers be operated at higher steam temperatures? Part 3: Initial analysis of costs and benefits

TAPPI Journal ◽

10.32964/tj13.8.65 ◽

2014 ◽

Vol 13 (8) ◽

pp. 65-78 ◽

Cited By ~ 3

Author(s):

W.B.A. (SANDY) SHARP ◽

W.J. JIM FREDERICK ◽

JAMES R. KEISER ◽

DOUGLAS L. SINGBEIL

Keyword(s):

Flue Gas ◽

Power Plants ◽

Superheated Steam ◽

Black Liquor ◽

Simulation Software ◽

Operating Conditions ◽

Costs And Benefits ◽

Steam Generation ◽

Fireside Corrosion ◽

Corrosion Resistant

The efficiencies of biomass-fueled power plants are much lower than those of coal-fueled plants because they restrict their exit steam temperatures to inhibit fireside corrosion of superheater tubes. However, restricting the temperature of a given mass of steam produced by a biomass boiler decreases the amount of power that can be generated from this steam in the turbine generator. This paper examines the relationship between the temperature of superheated steam produced by a boiler and the quantity of power that it can generate. The thermodynamic basis for this relationship is presented, and the value of the additional power that could be generated by operating with higher superheated steam temperatures is estimated. Calculations are presented for five plants that produce both steam and power. Two are powered by black liquor recovery boilers and three by wood-fired boilers. Steam generation parameters for these plants were supplied by industrial partners. Calculations using thermodynamics-based plant simulation software show that the value of the increased power that could be generated in these units by increasing superheated steam temperatures 100°C above current operating conditions ranges between US$2,410,000 and US$11,180,000 per year. The costs and benefits of achieving higher superheated steam conditions in an individual boiler depend on local plant conditions and the price of power. However, the magnitude of the increased power that can be generated by increasing superheated steam temperatures is so great that it appears to justify the cost of corrosion-mitigation methods such as installing corrosion-resistant materials costing far more than current superheater alloys; redesigning biomassfueled boilers to remove the superheater from the flue gas path; or adding chemicals to remove corrosive constituents from the flue gas. The most economic pathways to higher steam temperatures will very likely involve combinations of these methods. Particularly attractive approaches include installing more corrosion-resistant alloys in the hottest superheater locations, and relocating the superheater from the flue gas path to an externally-fired location or to the loop seal of a circulating fluidized bed boiler.

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