Operation And Maintenance Of Kraft Recovery Boilers And Associated Electrostatic Precipitators Subject To The New Source Performance Standards For Kraft Pulp Mills
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Operation And Maintenance Of Kraft Recovery Boilers And Associated Electrostatic Precipitators Subject To The New Source Performance Standards For Kraft Pulp Mills
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Author : George Walsh
language : en
Publisher:
Release Date : 1983
Operation And Maintenance Of Kraft Recovery Boilers And Associated Electrostatic Precipitators Subject To The New Source Performance Standards For Kraft Pulp Mills written by George Walsh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.
Federal Register
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Author :
language : en
Publisher:
Release Date : 1976
Federal Register written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Administrative law categories.
Effect Of Fly Ash Composition And Flue Gas Conditions On Removal Efficiency Of Electrostatic Precipitators In Kraft Recovery Boilers
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Author : Ezzat Jaroudi
language : en
Publisher:
Release Date : 2019
Effect Of Fly Ash Composition And Flue Gas Conditions On Removal Efficiency Of Electrostatic Precipitators In Kraft Recovery Boilers written by Ezzat Jaroudi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
In the chemical recovery process of kraft pulp mills, electrostatic precipitators (ESPs) are used to remove ash particles from the recovery boiler flue gas. High ash collection efficiency is necessary to minimize particulate emissions. A slight decrease in ESP performance could cause kraft mills to exceed their environmental emissions limits, which in severe cases, can force mills to curtail production until the issue is resolved. Therefore, understanding factors affecting ESP performance is of vital importance to the productivity and sustainability of kraft mills. This thesis work consists of two parts: 1) sensitivity analysis of factors affecting the particle collection efficiency of ESP using the conventional Deutsch-Anderson equation and 2) experimental investigation the effects of various parameters on ESP performance, including flue gas temperature, moisture content and ash chemical composition. Three types of ash were considered: ash with low carbonate and low chloride contents (typical ash), ash with low chloride but high carbonate contents, ash with low carbonate but high chloride contents. Results of sensitivity studies show that increasing the gas temperature decreases the ESP collection efficiency. Of the three types of ash examined, the high carbonate ash is the easiest to capture, followed by high chloride ash and then typical ash. Results of experiments using a bench scale ESP show that 1) increasing the gas temperature increases efficiency, 2) typical ash is the easiest to capture, followed by high carbonate ash and then high chloride ash, and 3) increasing moisture content in the gas improves the collection efficiency. The results also show that ash dielectric constant is as important as ash electrical resistivity in predicting how ash may affect the ESP collection efficiency, and that the sensitivity analysis predictions are improved when more accurate values of dielectric constant are used. From the results of the experiments, equations were derived for estimating the particle migration velocity for a given ESP design. The experimental results imply that the ESP collection efficiency decreases with an increase in black liquor firing load, increases as a result of the deposits that form on the heat exchanger tubes, and is not affected by sootblowing.
Environment Reporter
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Author :
language : en
Publisher:
Release Date : 1976
Environment Reporter written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Environmental law categories.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1978
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Aeronautics categories.
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Operation And Maintenance Manual For Electrostatic Precipitators
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Author :
language : en
Publisher:
Release Date : 1985
Operation And Maintenance Manual For Electrostatic Precipitators written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Electrostatic precipitation categories.
Epa Publications Bibliography
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Author : United States. Environmental Protection Agency
language : en
Publisher:
Release Date : 1987
Epa Publications Bibliography written by United States. Environmental Protection Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Environmental protection categories.
Safety Science Abstracts Journal
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Author :
language : en
Publisher:
Release Date : 1978
Safety Science Abstracts Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Industrial hygiene categories.
Epa Publications Bibliography
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Author :
language : en
Publisher:
Release Date : 1978
Epa Publications Bibliography written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Environmental protection categories.
Composite Tube Cracking In Kraft Recovery Boilers
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Author :
language : en
Publisher:
Release Date : 1997
Composite Tube Cracking In Kraft Recovery Boilers written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Beginning in the mid-1960s, increasing energy costs in Finland and Sweden made energy recovery more critical to the cost-effective operation of a kraft pulp mill. Boiler designers responded to this need by raising the steam operating pressure, but almost immediately the wall tubes in these new boilers began to corrode rapidly. Test panels installed in the walls of the most severely corroding boiler identified austenitic stainless steel as sufficiently resistant to the new corrosive conditions, and discussions with Sandvik AB, a Swedish tube manufacturer, led to the suggestion that coextruded tubes be used for water wall service in kraft recovery boilers. Replacement of carbon steel by coextruded tubes has solved most of the corrosion problems experienced by carbon steel wall tubes, however, these tubes have not been problem-free. Beginning in early 1995, a multidisciplinary research program funded by the US Department of Energy was established to investigate the cause of cracking in coextruded tubes and to develop improved materials for use in water walls and floors of kraft recovery boilers. One portion of that program, a state-of-the-art review of public- and private-domain documents related to coextruded tube cracking in kraft recovery boilers is reported here. Sources of information that were consulted for this review include the following: tube manufacturers, boiler manufacturers, public-domain literature, companies operating kraft recovery boilers, consultants and failure analysis laboratories, and failure analyses conducted specifically for this project. Much of the information contained in this report involves cracking problems experienced in recovery boiler floors and those aspects of spout and air-port-opening cracking not readily attributable to thermal fatigue. 61 refs.