Dust Cake Behavior in Filters with High Surface Area to Volume Ratios PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Dust Cake Behavior in Filters with High Surface Area to Volume Ratios PDF full book. Access full book title Dust Cake Behavior in Filters with High Surface Area to Volume Ratios by . Download full books in PDF and EPUB format.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6
Get Book Here
Book Description
Generally, new filter elements with large S/V ratios typically have inlet passages with a small cross sectional area to reach a large filter surface area internal to the filter element. To prevent plugging of the inlet passages, or to prevent the filter passage inlet velocity from becoming dangerously high causing cake disturbance, the high S/V filter can only accommodate a very thin cake. The conventional backpulse cleaning technique may not be able to dislodge this thin cake. The multi-tier design using ceramic candles can tolerate a thick dust cake. The conventional back-pulse cleaning technique could then be used to remove the dust cake. However, due to the proximity of the neighboring tiers, the large-volume flow of the back-pulse mixing with a huge quantity of dislodged dust cake could potentially perturb the local flow distribution from its initially well-mixed uniform flow and dust concentration. As soon as one spot or patch of dust cake forms on the neighboring candle surface due to this redistributed nonuniform flow and dust concentration, patching dust redeposition will occur on the neighboring tiers, leading eventually to ash bridging. This is because the rigid ceramic candle, unlike the fabric filter, does not flex during back-pulse cleaning; therefore, it cannot tolerate the uneven flow distribution. The back-pulse flow universally seeks the least resistance path, resulting in an uneven or patchy cleaning. Ash bridging is known to cause ceramic candle breakage due to the pulse ratchet problem. To understand the back-pulse cleaning problem caused by the use of high S/V rigid filter elements or the implementation of a multi-tier design, a bench-scale, two-dimensional (2-D) cold flow filter test facility is being constructed, and is scheduled for shakedown and testing in July 1993.
Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 508
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Coal
Languages : en
Pages : 346
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 426
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages : 480
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 105
Get Book Here
Book Description
In the spring of 1989, two separate test series were simultaneously conducted at the US Department of Energy's (DOE's) Morgantown Energy Technology Center (METC) to examine applied and fundamental behavior of dust cake filtration under high temperature and high pressure (HTHP) conditions. The purpose was to provide information on dust-cake filtration properties to gas stream cleanup researchers associated with the Tidd 70 megawatt (MW) pressurized fluidized-bed combustor (PFBC). The two test facilities included (1) a high-pressure natural-gas combustor with injected particulate, which was fed to two full-size candle filters; and (2) an atmospheric fluidized-bed combustor (AFBC) with coal and limestone sorbent to generate a particulate-laden combustion exhaust gas, which was sent to a single full-size candle filter and a small-scale disc filter. Several major conclusions from these studies are noted below. On average reducing the mean particulate size by 33% and the associated loading carried in the filtrate will increase the dust cake specific flow resistance (K2) by 498%. High-temperature and high-pressure filtration can be successfully performed with ceramic candle filters at moderate filtration face velocities and reasonable system pressure drops. Off-line filter cleaning can produce a filter system with a higher apparent permeability than that produced from on-line filter cleaning at the same face velocity. 19 refs., 89 figs., 13 tabs.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 868
Get Book Here
Book Description
Author: Arthur J. Haft
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 140
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1224
Get Book Here
Book Description
