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Author : Stuart C. Mitchell
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.0/5 ( download)
Download or read book Hot Gas Particulate Filtration written by Stuart C. Mitchell and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (727 download)
Download or read book Ceramic Filters for Removal of Particulates from Hot Gas Streams written by and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary goal is to demonstrate the performance of a new ceramic filter in removing particulate matter from hot gas streams produced in advanced coal conversion processes. The specific objectives are threefold: (1) Development of full size ceramic filters suitable for hot gas filtration; (2) Demonstration of ceramic filters in long term (ca. 1000 hrs) field trials; and (3) Development of full-scale hot gas filter system designs and costs. To date, field tests of the ceramic filter for particulate removal have been conducted at seven sites on a variety of gas streams and under a variety of test conditions. In general, the following performance characteristics have been observed: 1. Filtration face velocity (equivalent to an ''air to cloth ratio'') for flue gas tests is comparable to that for pulse jet bags operating at the same pressure drop. In hot gas tests, flow-pressure drop characteristics have been observed to be comparable to those for other ceramic filters. 2. Complete regeneration by a simple backpulse technique is achieved; i.e., no increase in clean filter resistance over repetitive cycles is observed. 3. No plugging of the filter passageways by badly caking particulates is observed. 4. Essentially complete particulate removal, including submicron particulate matter, is achieved.
Download or read book Alinoeddin Enda Boemi written by and published by . This book was released on 1925 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book Use of Laboratory Drag Measurements in Evaluating Hot-Gas Filtration of Char from the Transport Gasifier at the Power Systems Development Facility written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The initial objective of this study was to better understand the reasons for the substantial increase in filter DP that was observed after the gasifier recycle loop modifications. Beyond this specific objective, a secondary goal was to develop a meaningful method of evaluating the effect of particle size and other particle properties on dustcake drag and filter DP. As mentioned earlier, the effect of particle size on dustcake drag and filter DP can be a very important consideration in the selection and specification of a precleaner cyclone for use upstream of the hot-gas filter. Installing a cyclone ahead of a hot-gas filter will reduce the transient areal loading of dust to the filter, but the beneficial effect of the reduced areal loading may be offset by an increase in drag associated with a finer particle-size distribution. The overall goal of this study was to better understand these tradeoffs and to ultimately develop a procedure that would be useful in analyzing the performance of hot-gas filters and in sizing new hot-gas filters. In addition to the obvious effects of a cyclone on dust loading and particle size, other indirect effects on particulate properties and flow resistance may occur when the cyclone is incorporated into the gasifier recycle loop as was the case at the PSDF. To better understand the importance of these other effects, this study sought to separate the particle-size effect from these other effects by measuring the drag of size-fractionated char samples collected before and after the recycle loop modifications.
Download or read book المقارنة المغلقة written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : DeWayne Edward Howell (II.)
Publisher :
ISBN 13 :
Total Pages : 186 pages
Book Rating : 4.:/5 (441 download)
Download or read book Ceramic Filters for Hot Gas Filtration written by DeWayne Edward Howell (II.) and published by . This book was released on 1999 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. E. Howell
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (345 download)
Download or read book Ceramic Filters for Hot Gas Filtration written by D. E. Howell and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 54 pages
Book Rating : 4.:/5 (684 download)
Download or read book PARTICLE TRANSPORTATION AND DEPOSITION IN HOT GAS FILTER VESSELS - A COMPUTATIONAL AND EXPERIMENTAL MODELING APPROACH. written by and published by . This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, a computational modeling approach for analyzing flow and ash transport and deposition in filter vessels was developed. An Eulerian-Lagrangian formulation for studying hot-gas filtration process was established. The approach uses an Eulerian analysis of gas flows in the filter vessel, and makes use of the Lagrangian trajectory analysis for the particle transport and deposition. Particular attention was given to the Siemens-Westinghouse filter vessel at Power System Development Facility in Wilsonville in Alabama. Details of hot-gas flow in this tangential flow filter vessel are evaluated. The simulation results show that the rapidly rotation flow in the spacing between the shroud and the vessel refractory acts as cyclone that leads to the removal of a large fraction of the larger particles from the gas stream. Several alternate designs for the filter vessel are considered. These include a vessel with a short shroud, a filter vessel with no shroud and a vessel with a deflector plate. The hot-gas flow and particle transport and deposition in various vessels are evaluated. The deposition patterns in various vessels are compared. It is shown that certain filter vessel designs allow for the large particles to remain suspended in the gas stream and to deposit on the filters. The presence of the larger particles in the filter cake leads to lower mechanical strength thus allowing for the back-pulse process to more easily remove the filter cake. A laboratory-scale filter vessel for testing the cold flow condition was designed and fabricated. A laser-based flow visualization technique is used and the gas flow condition in the laboratory-scale vessel was experimental studied. A computer model for the experimental vessel was also developed and the gas flow and particle transport patterns are evaluated.
Author : Biplab Mukherjee
Publisher :
ISBN 13 :
Total Pages : 168 pages
Book Rating : 4.:/5 (437 download)
Download or read book Characterization of Hot Gas Filter Ash Strength Development During Hot Gas Filtration written by Biplab Mukherjee and published by . This book was released on 2004 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (685 download)
Download or read book Evaluating Ceramic Filter Media on a Slipstream of Hot Flue Gas written by and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for more efficient systems for generating electric power from coal has led to a number of new technological developments, including such processes as pressurized fluidized-bed combustion (PFBC) and integrated gasification combined-cycle (IGCC) systems. To achieve maximum efficiency, a common and critical requirement for these technologies is a method for removing suspended particulate matter from the gas stream at high temperatures (above 1000 F) and high pressures (greater than 10 bar). The US Department of Energy's Morgantown Energy Technology Center (METC) is pursuing the development of such hot gas cleanup methods through an extensive program of fundamental and pilot studies in cooperation with utilities, supporting industries, and other research organizations. As a part of this program, Southern Research Institute (SRI) is carrying out a series of studies using a high-temperature sidestream device for performing long-duration tests on small specimens (patches) of filter materials on a process gas stream from an atmospheric-pressure fluidized-bed combuster. SRI developed an apparatus and a test plan to accomplish three of METC's objectives: (1) to determine the effects on ceramic filters of long-term filtration of particle-laden flue gases at high temperatures, (2) to compare the filtration performance of several kinds of filters, and (3) to simulate the Plant Tidd ash loading on filters so that results from these tests could be used to help select filters for use at the Tidd 10 MW pilot-scale facility. Preliminary results are discussed.
Author : Sneha Swaminathan
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659270307
Total Pages : 184 pages
Book Rating : 4.2/5 (73 download)
Download or read book Catalytic Nanofiber Media for Air and Hot Gas Filtration written by Sneha Swaminathan and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: For environmental protection, the suppression of automotive exhausts such as nitrogen oxides and carbon monoxide is very important. These gases are potential health hazards and green house gases. Hence this concern triggered the need for stringent environmental regulations which resulted in the introduction of catalytic devices in automobiles. In this book, a novel approach has been developed wherein the noble metal nanocatalysts have been incorporated on ceramic nanofibers by the electrospinning process. The catalysts on ceramic nanofibers increase the overall exposed catalyst area and simultaneously immobilize the catalyst to minimize catalyst loss. A small amount of the catalyst incorporated into ceramic nanofibers was mixed with microfibers to fabricate a filter disk by vacuum molding. This filter disk termed as 'catalytic filter'is a combination of catalytic elements and filter. The catalyzed ceramic nanofiber augmented microfiber filter media can be used for two applications: reduction of NOx and oxidation of CO and for enhanced particulate removal.
Author : Bharath Raghavan
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783844314991
Total Pages : 172 pages
Book Rating : 4.3/5 (149 download)
Download or read book Nanofiber Filter Media for Air and Hot Gas Filtration Applications written by Bharath Raghavan and published by LAP Lambert Academic Publishing. This book was released on 2011-06 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonwoven fibrous media with nanofibers have significant filtration applications in automotive, chemical, transportation, power generation and pharmaceutical/biological industries. Nanofibers have higher capture efficiencies in comparison to microfibers in the submicron particle size range of 100 - 500 nm because of smaller fiber diameter and increased surface area of the fibers. Nanofibers are in the slip flow regime as a consequence of which steep increase in pressure drop is considerably reduced due to slip effect. The economic benefits of using nanofiber filter media are improved filter performance and compact filters. Electrospinning process was used to fabricate polymer and ceramic nanofibers. The electrospun polymer nanofibers were added to the nonwoven fibrous media to improve filter performance for air filtration. This improved filter performance was in consistent with numerical modeling. This book describes the experimental and modeling results of particle loading on fibrous media and application of ceramic nanofibers for hot gas filtration applications.
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book A Fast Network Flow Model is Used in Conjunction with Measurements of Filter Permeability to Calculate the Performance of Hot Gas Filters written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two different technologies that are being considered for generating electric power on a large scale by burning coal are Pressurized Fluid Bed Combustion (PFBC) systems and Integrated Gasification and Combined Cycle (IGCC) systems. Particulate emission regulations that have been proposed for future systems may require that these systems be fitted with large scale Hot Gas Clean-Up (HGCU) filtration systems that would remove the fine particulate matter from the hot gas streams that are generated by PFBC and IGCC systems. These hot gas filtration systems are geometrically and aerodynamically complex. They typically are constructed with large arrays of ceramic candle filter elements (CFE). The successful design of these systems require an accurate assessment of the rate at which mechanical energy of the gas flow is dissipated as it passes through the filter containment vessel and the individual candle filter elements that make up the system. Because the filtration medium is typically made of a porous ceramic material having open pore sizes that are much smaller than the dimensions of the containment vessel, the filtration medium is usually considered to be a permeable medium that follows Darcy's law. The permeability constant that is measured in the lab is considered to be a function of the filtration medium only and is usually assumed to apply equally to all the filters in the vessel as if the flow were divided evenly among all the filter elements. In general, the flow of gas through each individual CFE will depend not only on the geometrical characteristics of the filtration medium, but also on the local mean flows in the filter containment vessel that a particular filter element sees. The flow inside the CFE core, through the system manifolds, and inside the containment vessel itself will be coupled to the flow in the filter medium by various Reynolds number effects. For any given filter containment vessel, since the mean flows are different in different locations inside the vessel, the flow of gas through an individual CFE will adjust itself to accommodate the local mean flows that prevail in its general location. In some locations this adjustment will take place at High Reynolds numbers and in other locations this will occur at low Reynolds numbers. The analysis done here investigates the nature of this coupling.
Author :
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)
Download or read book Experiences of the Application of Hot Gas Filtration to Industrial Processes written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hot Gas Filtration (HGF) is defined as the dry scrubbing of gaseous process effluent above 250 degrees. The potential applications for this technology can be found in Atmospheric Pollution Control (APC) and In-Line Equipment Protection (ILETP). In recent years novel rigid refractory filter media have emerged with several advantages over conventional fabric bag filters and other particulate arrestment systems e.g. electrostatic precipitators. A study has been made of the effect of a wide range of operational conditions, including gas volume and velocity, temperature, particle size distribution, and organic/moisture content, in real process situations on filter elements performance and life expectancy.
Author : Kenneth S Sutherland
Publisher : Elsevier
ISBN 13 : 0080558046
Total Pages : 536 pages
Book Rating : 4.0/5 (85 download)
Download or read book Filters and Filtration Handbook written by Kenneth S Sutherland and published by Elsevier. This book was released on 2011-04-18 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filters are used in most industries, especially the water, sewage, oil, gas, food and beverage, and pharmaceutical industries. The new edition of this established title is an all-encompassing practical account of standard filtration equipment and its applications. Completely revised and rewritten, it is an essential book for the engineer working in a plant situation-who requires guidance and information on what’s available and whether it’s suitable for the job. Co-published with the Institution of Chemical Engineers. Co-published with the Institution of Chemical Engineers. The leading practical engineering guide to filtration techniques, systems and their applications Meets the needs of all key sectors where filtration is a critical process, including chemical processing and manufacture, food, oil and gas, air-conditioning and water A comprehensive sourcebook and reference for plant engineers, process engineers, plant designers, filter media and filtration specialists and equipment specifiers
Author : Nathan Adam Nelson
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 (718 download)
Download or read book Hot Gas Particulate Removal from Gasification Streams written by Nathan Adam Nelson and published by . This book was released on 2006 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gasification produces a hot, particulate-laden, flammable gas mixture which has the potential to be used in a variety of applications to produce energy. The ability to use multiple feedstocks such as biorenewable plant matter to fuel the gasification reaction is seen as advantageous. The particulate and other byproducts created from the gasification of biorenewable feedstocks cause issues in using the hot flammable gas in downstream applications. The ability to filter unwanted particulate from the hot flammable gas was investigated using a high temperature fabric filter. During testing and analysis, the formation of the dust cake on the fabric filter was studied, as well as the theoretical filtration efficiencies for a single fiber based on the operating conditions during steady state filtration. It was discovered that greater than 99% of the particulate was removed by the fabric filter. Unexpectedly there was no relationship discovered between the filtration time, pressure differential across the filter or the mass concentration of particulate and the filtration efficiencies. These anomalies are discussed and future changes for testing are recommended.
Download or read book Hot Gas Filter and System Assembly written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A filter element for separating fine dirty particles from a hot gas. The filter element comprises a first porous wall and a second porous wall. Each porous wall has an outer surface and an inner surface. The first and second porous walls being coupled together thereby forming a substantially closed figure and open at one end. The open end is formed to be coupled to a hot gas clean up system support structure. The first and second porous walls define a channel beginning at the open end and terminate at the closed end through which a filtered clean gas can flow through and out into the clean gas side of a hot gas clean up system.
