Download or read book Predicting Nitrogen Oxides Emissions of Tangentially Coal fired Boilers written by Chun-leung Lee and published by . This book was released on 2010 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Advanced Tangentially Fired Combustion Techniques for the Reduction of Nitrogen Oxides NOx Emissions from Coal fired Boilers Demonstration Project written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This document serves as a DOE post-project assessment of a project in Round 2 of the Department of Energy's Clean Coal Technology (CCT) Program: ''Advanced Tangentially Fired Combustion Techniques for the Reduction of Nitrogen Oxides (NO(subscript x)) Emissions From Coal-Fired Boilers Demonstration Project''. In September 1990, Southern Company Services entered into an agreement to conduct the study, with Gulf Power Company providing the 180 megawatt electric (MWe) host site and ABB C-E Services Inc. providing the technology to be demonstrated. This project was undertaken to evaluate the nitrogen oxides (NO(subscript x)) reduction potential of several variations of the Low NO(subscript x) Concentric Firing System (LNCFS{trademark}) when applied to tangentially fired (T-fired) boilers. The project consisted of replacing the existing coal and air nozzles with new nozzles and adding overfire air. Three versions of the LNCFS system were tested: Level 1 consisted of new coal nozzles and close-coupled overfire air; Level 2 used the same burners but separated the overfire air; and Level 3 used both close-coupled and separated overfire air. The performance objectives were as follows: (1) to determine the short-term and long-term NO(subscript x) emissions reduction capabilities and impact on unit performance of the low-NO(subscript x) combustion technologies of LNCFS Levels 1, 2, and 3 when implemented in a stepwise manner on a T-fired boiler operating under normal dispatch conditions, the NO(subscript x) reduction objective was 50%; (2) to compare the performance and cost effectiveness of these technologies; and (3) to determine the relationship between operating parameters (e.g., unit load, percent overfire air) and NO(subscript x) emissions and other unit performance indicators, such as unburned carbon, carbon monoxide (CO) level, and air toxics. All goals were met in the demonstration project, which was conducted at Gulf Power's Plant Lansing Smith Unit No. 2 (rated at 180 MWe, but capable of operation at 200 MWe).
Download or read book Pilot scale Development of a Low NOx Coal fired Tangential System written by and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimation of NO3 Emissions from Pulverized Coal fired Utility Boilers Final Report written by and published by . This book was released on 1995 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The formation of nitrogen oxides (NO3 during pulverized-coal combustion in utility boilers is governed by many factors, including the boilers̀€ design characteristics and operating conditions, and coal properties. Presently, no simple, reliable method is publicly available to estimate NO3 emissions from any coal-fired boiler. A neural network back-propagation algorithm was previously developed using a small data set of boiler design characteristics and operating conditions, and coal properties for tangentially fired boilers. This initial effort yielded sufficient confidence in the use of neural network data analysis techniques to expand the data base to other boiler firing modes. A new neural network-based algorithm has been developed for all major pulverized coal-firing modes (wall, opposed-wall, cell, and tangential) that accurately predicts NO3 emissions using 11 readily available data inputs. A sensitivity study, which was completed for all major input parameters, yielded results that agree with conventional wisdom and practical experience. This new algorithm is being used by others, including the Electric Power Research Institute (EPRI). EPRI has included the algorithm in its new software for making emissions compliance decisions, the Clean Air Technology Workstation.
Download or read book Reburning Technologies for the Control of Nitrogen Oxides Emissions from Coal Fired Boilers written by and published by DIANE Publishing. This book was released on with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 23 European Symposium on Computer Aided Process Engineering written by Achim Wechsung and published by Elsevier Inc. Chapters. This book was released on 2013-06-10 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A dynamic model of a coal fired boiler is proposed to predict the formation of NOx during plant operation. Since evaluation of the model at hand should only take few minutes, computationally expensive CFD simulations are not feasible. Instead, it is proposed to represent the boiler as a network of ideal reactors. Gas phase reactions are modeled using a detailed kinetic mechanism; additional consideration is necessary for the heterogeneous reactions on char particles. In the reported preliminary case studies, radiative heat transfer is not considered.
Download or read book Control Techniques for Nitrogen Oxides Emissions from Stationary Sources written by and published by . This book was released on 1978 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 180 MW Demonstration of Advanced Tangentially fired Combustion Techniques for the Reduction of Nitrogen Oxide NO Sub X Emissions from Coal fired Boilers written by and published by . This book was released on 1991 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABB CE's Low NOx Bulk Furnace Staging (LNBFS) System and Low NOx Concentric Firing System (LNCFS) are demonstrated in stepwise fashion. These systems incorporate the concept of advanced overfire air (AOFA), clustered coal nozzles, and offset air. A complete description of the installed technologies is provided in the following section. The primary objective of the Plant Lansing Smith demonstration is to determine the long-term effects of commercially available tangentially-fired low NOx combustion technologies on NOx emissions and boiler performance. Short-term tests of each technology are also being performed to provide engineering information about emissions and performance trends. A target of achieving fifty percent NOx reduction using combustion modifications has been established for the project.
Download or read book Predictions of NOx Emissions in Pulverized Coal Combustion written by Niko Hachenberg and published by . This book was released on 2014 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this research work was to develop a transferable mathematically simple model which gives the possibility to make fast and easy predictions regarding the NOx emission behavior of a broad-spectrum of coals within a certain combustion environment. In this context, this thesis is a further step of a common ongoing investigation focused on predicting NOx emissions from self-sustaining, pulverized coal combustion in dry bottom firing systems. A comprehensive literature research focused on already published NOx prediction approaches from scientific publications based on fundamental quantitative relationships or empirical algorithms and statistical relationships was also carried out in this context. This research concentrated on three specific areas which were found to constitute a major gap in the knowledge of NOx formation in industrial full-scale applications: the fuel properties; the dependence of furnace geometry factors; and the specific operating conditions. The developed model shows a strong statistical significance with a coefficient of determination of 0.9876 and a standard error of 28 mg / m3 STPdry at 6 % O2 based on 142 observations coming from 28 utility boilers. Direct comparisons between model history and observations reported by other researchers have also shown very good conformities. For that background, this thesis form a good basis for identifying individual factors which contributes to system related NOx emissions in order to investigate how variations in the process parameters affect the emission level. Perhaps, as contribution to the understanding of NOx formation during coal combustion what is still an imperfectly understood phenomenon, or as basis for possible process optimization which might find application on pulverized coal-fired boilers to make the world a little bit more green.
Download or read book Development of Nitrogen Oxide Emission and Combustion Performance Prediction Models for Pulverised Coal Fired Boilers written by Allen Lowe and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Nitrogen Oxide Emissions Data from TVA Coal fired Boilers written by Susan Stamey-Hall and published by . This book was released on 1992 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Current EPA emission factors (AP-42) for nitrogen oxides (NOx) from utility coal-fired boilers do not account for variations either in emissions as a function of generating unit load, or in designs of boilers of the same general type, particularly wall-fired boilers. TVA has recently compiled short-term NOx emissions data from 30 units at 11 TVA coal-fired plants....In this study, the NOx emission rates from each boiler were calculated and compared with the calculated rate for each boiler type using AP-42."--Page ii.
Download or read book ESP Performance Analysis During the 180 MW Demonstration of Advanced Tangentially fired Combustion Techniques for the Reduction of Nitrogen Oxide Emissions from Coal Fired Boilers written by and published by . This book was released on 1993 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The particle mass loadings exiting the furnace and entering the ESP were within the expected range predicted by the EPRI data base for the ash content of the coal burned. In general, only minor variations in mass loadings were observed between the test phases. At full load, the dry standard mass loadings were within 1 standard deviation of the mean of all tests. For all test phases, the average difference from the baseline mass loading was 6%. This is very little change, and is as likely to be related to coal characteristics or noise in the measurement as to low-NO(subscript x) modifications. ESP performance modeling was performed on the assumption that the only differences between the test phases were the gas volume changes caused by the measured differences in long-term oxygen levels. Otherwise, all test phases were assumed to have the same operating conditions as the baseline condition. Projections were made for a series of hypothetical ESPs with SCA values ranging from 150 to 500 ft2/1000 acfm. Hot-side modeling results showed that LNCFS 2 operation is expected to increase the ESP particle penetration over the baseline values by from 8% for a small ESP to 27% for a large ESP. For LNCFS 3 operation, the increase is from 5 to 19% for small and large ESPs. For LNCFS 1 operation, the ESP particle penetration is reduced from the baseline levels by from 4% for a small ESP to 13% for a large ESP. Because of basic differences in their natures, the projected performance of the cold-side ESPs was significantly better than the hot-side units for all cases. Because of the lower overall emissions, the changes produced by the volume flow increases resulted in higher relative changes. The model predicted penetration increases of 9% to 35% for LNCFS 2 and 7% to 25% for LNCFS 3. The reduced oxygen during LNCFS 1 reduced penetration by 6% to 17%.
Download or read book NOx Modelling and Prediction written by Ruksana Moreea-Taha and published by . This book was released on 2000 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Prediction of Emissions and Performance of Coal Liquids in Tangential and Wall fired Boilers written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Anomaly Detection Technologies and Applications in Energy Systems written by Tinghui Ouyang and published by Frontiers Media SA. This book was released on 2022-10-14 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmentally Oriented Modernization of Power Boilers written by Marek Pronobis and published by Elsevier. This book was released on 2020-05-15 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmentally oriented modernization of power boilers explains how to retrofit and upgrade power boilers in aging thermal and CHP plants, with emphasis on pulverized fuel boilers (PF). The work provides direct avenues to higher boiler efficiency, harmful emissions reduction, fuel grinding system modernization, fuel flexibility, boiler operation flexibilization, reduced corrosion, erosion, and fouling. It also explores how to integrate emission reduction systems into boiler operations. The work is planned for engineers and graduate students as well as for power plant management. For the latter, it helps find the best solution for the necessary modernization and functions as an aid in organizing tenders as well as in evaluating projects offered. Errata to published editions can be found here https://modernpowerboilers.org/errata.html - Presents, in a clear and accessible way, the most important solutions related to boiler emissions reduction, including CO2 emissions - Helps increase boiler efficiency through technical and operational upgrades - Helps increase the usefulness of boilers by increasing fuel and operational flexibility - Supports reduction of harmful phenomena, such as corrosion, erosion, and fouling - Accompanied with a careful selection of realized modernizations, including pitfalls and best practice discussion - Chapters are presented alongside hundreds of literature references for further study
