The Effect Of Dual Flue Gas Conditioning On Fly Ash Characteristics
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The Effect Of Dual Flue Gas Conditioning On Fly Ash Characteristics
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Author : S. Shanthakumar
language : en
Publisher:
Release Date : 2009
The Effect Of Dual Flue Gas Conditioning On Fly Ash Characteristics written by S. Shanthakumar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Aggregates (Building materials) categories.
Dual flue gas conditioning (DFGC) deals with the addition of chemical additives such as ammonia and sulfur trioxide, simultaneously, to the flue gas for increasing the ash collection efficiency of electrostatic precipitators (ESPs). Previous studies with ammonia as the conditioning agent [i.e., ammonia flue gas conditioning (AFGC)] have revealed that the collection efficiency increases drastically due to agglomeration of ash particles. However, in what way combination of sulfur trioxide and ammonia helps in increasing the efficiency of ESPs, and hence controlling emissions from the power stations, has not yet been studied in detail. With this in view, efforts were made to investigate the influence of DFGC and AFGC on the collection efficiency of ESPs and overall properties of the ash. To achieve this, fly ash samples from a thermal power station in India, where DFGC is being adopted, were collected and their physico-chemico-mineralogical and morphological properties were investigated. The results obtained were critically analyzed vis-à-vis those obtained for the fly ash samples collected from a thermal power plant where only AFGC is being adopted. The advantage of DFGC over AFGC for enhancing the overall collection efficiency of ESPs has been demonstrated in this paper.
Flue Gas And Fly Ash
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Author : P.F. Sens
language : en
Publisher: CRC Press
Release Date : 2003-09-02
Flue Gas And Fly Ash written by P.F. Sens and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-09-02 with Science categories.
Proceedings of a contractors' meeting organized by the Commission of the European Communities, Directorate-General XII for Science, Research and Development, held in Brussels, Belgium, 16 June 1988.
Multi Pollutant Control For Flue Gases
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Author : Xiang Gao
language : en
Publisher: Springer Nature
Release Date : 2021-10-20
Multi Pollutant Control For Flue Gases written by Xiang Gao and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-20 with Science categories.
This book presents the latest multi-pollutant (mainly NOx, SOx, particulate matter, heavy metals) control technologies for flue gases and the applications in coal-fired power plants. Pollutant control by catalytic, electric, and absorption methods, the multi-pollutant removal system and its performance evaluation are systematically introduced. This book is a valuable reference for researchers and practitioners in environmental science & engineering, energy power engineering, and chemical science & engineering, etc.
Environmental Geotechnology Meeting Challenges Through Needs Based Instrumentation
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Author : Devendra Narain Singh
language : en
Publisher: World Scientific
Release Date : 2022-01-21
Environmental Geotechnology Meeting Challenges Through Needs Based Instrumentation written by Devendra Narain Singh and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-21 with Technology & Engineering categories.
The rise of rapid and uncontrolled industrialization, its alarming levels of hazardous waste produced, and their negative contribution to the international environmental epidemic of global warming — in addition to the decrease in room to dispose of these wastes safely — have put the pressure for many engineers, researchers, and key decision-makers to find the answers to the constant tussle between progress and sustainability — and quickly.Environmental Geotechnology revisits existing concepts of geotechnical engineering critically, and brings them up to date with new knowledge and current affairs so as to better address and serve today's needs of the professionals. It points out the role and importance of the parameters and mechanisms that govern the interaction of contaminants with geomaterials (soil and rock mass), and also discusses their degradation in the long-run, and the consequences that follow.The book starts from a engineering philosophy that incorporates the influence of environmental effects (both manmade and natural) on geotechnical engineering practices. Its contents are based on geotechnical and environmental engineering studies pertaining to waste management, such as: the safe handling, transportation and disposal of waste, the estimation of waste leakage into the subsurface, its consequences, methods of containment, and the development of schemes to remediate contaminated land. It also proposes innovative strategies for waste management through the utilization of wastes based on a comprehensive characterization.Modelling techniques such as accelerated physical modelling using geotechnical centrifuge, finite-element or difference-based numerical modelling and physico-chemico-mineralogical modelling are discussed in this book to enable the study of the complex (and otherwise slow) process of contaminant-geomaterial interaction.Related Link(s)
Nitrogen Compounds Advances In Research And Application 2011 Edition
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Author :
language : en
Publisher: ScholarlyEditions
Release Date : 2012-01-09
Nitrogen Compounds Advances In Research And Application 2011 Edition written by and has been published by ScholarlyEditions this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-09 with Science categories.
Nitrogen Compounds: Advances in Research and Application: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Nitrogen Compounds. The editors have built Nitrogen Compounds: Advances in Research and Application: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Nitrogen Compounds in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Nitrogen Compounds: Advances in Research and Application: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Properties And Use Of Coal Fly Ash
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Author : Lindon K.A. Sear
language : en
Publisher: Thomas Telford
Release Date : 2001-10-15
Properties And Use Of Coal Fly Ash written by Lindon K.A. Sear and has been published by Thomas Telford this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-10-15 with Science categories.
This book draws together a large quantity of research that has been carried out on pulverised fuel ash (PFA) over the past 30 years.In addition to covering the potential uses of PFA it provides an overview of the benefits of use.
Fundamental Mechanisms In Flue Gas Conditioning Quarterly Report January 1995 March 1995
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Author :
language : en
Publisher:
Release Date : 1995
Fundamental Mechanisms In Flue Gas Conditioning Quarterly Report January 1995 March 1995 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
This project is divided into four tasks. We developed our Management Plan in Task 1. Task 2, Evaluation of Mechanisms in FGD Sorbent and Ash Interactions, focused on characteristics of binary mixtures of these distinct powders. Task 3, Evaluation of Mechanisms in Conditioning Agents and Ash, was designed to examine effects of various conditioning agents on fine ash particles to determine mechanisms by which these agents alter physical properties of ash. We began Tasks 2 and 3 with an extensive literature search and assembly of existing theories. We completed this phase of the project with publication of two special Topical Reports. In our literature reviews reported in Topical Reports 1 and 2, we emphasized the roles adsorbed water can have in controlling bulk properties of powders. During the next phase of the project we analyzed a variety of fly ashes and fine powders in the laboratory. The experiments we performed were primarily designed to define the extent to which water affects key properties of ashes, powders, and mixtures of sorbents and ashes. We have recently completed a series of pilot-scale tests designed to determine the effects that adsorbed water has on fabric filtration and electrostatic precipitation of entrained fly ash particles in actual flue gas environments. Under Task 4 we will issue our Final Report that will summarize the results of our laboratory and pilot-scale work and will also include a model of flue gas conditioning. In addition to a few measurements performed on Bell Ayr Powder River Basin coal ash (ID No. 4118) collected during our most recent pilot-scale test, our efforts during this reporting quarter have been directed toward production of the Draft Final Report and the Flue Gas Conditioning Model.
Determining Residual Ammonia In Flue Gas Conditioned Fly Ashes And Its Influence On The Pozzolanic Activity
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Author : S. Shanthakumar
language : en
Publisher:
Release Date : 2011
Determining Residual Ammonia In Flue Gas Conditioned Fly Ashes And Its Influence On The Pozzolanic Activity written by S. Shanthakumar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Air categories.
Thermal power stations employ flue gas conditioning (FGC) technique to reduce the emission of suspended particulate matter in the surrounding atmosphere substantially. This technique involves the treatment of flue gases by adding the chemical agents (viz., ammonia and/or sulfur trioxide) to the flue gas, which in turn increases the collection efficiency of electrostatic precipitators. Since the pozzolanic activity of the fly ash is important for its suitability as a cementitious material in the construction industry, the presence of residual ammonia in fly ash may adversely affect its utilization. Hence, it becomes mandatory to establish the presence of residual ammonia in the fly ash, and its influence on the pozzolanic activity of the fly ash needs to be studied in details. With this in view, fly ash samples from coal based thermal power stations in India, where FGC is being done, were collected, and the residual ammonia as well as pozzolanic activity was determined. Based on these investigations, it has been demonstrated that the influence of residual ammonia from FGC on pozzolanic activity of the fly ash is insignificant.
The Effect Of Flyash Addition On The Geotechnical Properties Of Flue Gas Desulfurization Sludges
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Author : Phillip Holley Johnston
language : en
Publisher:
Release Date : 1978
The Effect Of Flyash Addition On The Geotechnical Properties Of Flue Gas Desulfurization Sludges written by Phillip Holley Johnston and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Desulfurization categories.
Flue Gas Conditioning For Improved Particle Collection In Electrostatic Precipitators Second Topical Report Results Of Bench Scale Screening Of Additives
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Author :
language : en
Publisher:
Release Date : 1993
Flue Gas Conditioning For Improved Particle Collection In Electrostatic Precipitators Second Topical Report Results Of Bench Scale Screening Of Additives written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.
ADA Technologies, Inc. (ADA) has completed the bench-scale testing phase of a program to evaluate additives that will improve the collection of fine particles in electrostatic precipitators (ESPs). A bench-scale ESP was installed at the Consolidation Coal Company (CONSOL) combustion research and development facility in Library, PA in order to conduct the evaluation. During a two-week test, four candidate additives were injected into the flue gas ahead of a 100 acfm ESP to determine the effect on fly ash collectability. Two additives were found to reduce the emissions from the ESP. Additives ''C'' and ''D'' performed better than initially anticipated -- reducing emissions initially by 17%. Emissions were reduced by 27% after the ESP was modified by the installation of baffles to minimize sneakage. In addition to the measured improvements in performance, no detrimental effects (i.e., electrode fouling) were observed in the operation of the ESP during the testing. The measures of success identified for the bench-scale phase of the program have been surpassed. Since the additives will affect only non-rapping reentrainment particle losses, it is expected that an even greater improvement in particle collection will be observed in larger-scale ESPs. Therefore, positive results are anticipated during the pilot-scale phase of the program and during a future full-scale demonstration test. A preliminary economic analysis was performed to evaluate the cost of the additive process and to compare its costs against alternative means for reducing emissions from ESPs. The results show that conditioning with additive C at a rate of 0.05% (wt. additive to wt. fly ash) is much less expensive than adding new ESP capacity, and more cost competitive than existing chemical conditioning processes. Preliminary chemical analysis of conditioned fly ash shows that it passes the Toxicity Characteristic Leaching Procedure criteria.