Method of producing monolithic ceramic cross-flow filter

Larsen, David A; Bacchi, David P; Connors, Timothy F

Title: Method of producing monolithic ceramic cross-flow filter

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Abstract

Ceramic filter of various configuration have been used to filter particulates from hot gases exhausted from coal-fired systems. Prior ceramic cross-flow filters have been favored over other types, but those previously horn have been assemblies of parts somehow fastened together and consequently subject often to distortion or delamination on exposure hot gas in normal use. The present new monolithic, seamless, cross-flow ceramic filters, being of one-piece construction, are not prone to such failure. Further, these new products are made by novel casting process which involves the key steps of demolding the ceramic filter green body so that none of the fragile inner walls of the filter is cracked or broken.

Inventors:

Larsen, David A ^[1]; Bacchi, David P ^[2]; Connors, Timothy F ^[3]; Collins, III, Edwin L. ^[4]

Clifton Park, NY
Schenectady, NY
Watervliet, NY
(Albany, NY)

Issue Date:: 1998-01-01

Research Org.:: Blasch Precision Ceramics, Inc., Albany, NY (US)

OSTI Identifier:: 871359

Patent Number(s):: 5716559

Assignee:: Blasch Precision Ceramics, Inc. (Albany, NY)

Patent Classifications (CPCs):: B - PERFORMING OPERATIONS B28 - WORKING CEMENT, CLAY, OR STONE B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

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B - PERFORMING OPERATIONS B28 - WORKING CEMENT, CLAY, OR STONE B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
B28B1/007 - {by freezing the material}

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D46/0001 - {Making filtering elements}

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B38/0045 - {by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes}
C04B35/00 - Shaped ceramic products characterised by their composition {

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D46/10 - Particle separators, e.g. dust precipitators, using filter plates, sheets, or pads having plane surfaces {, i.e. axial filtering}

B - PERFORMING OPERATIONS B28 - WORKING CEMENT, CLAY, OR STONE B28B - SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
B28B7/18 - the holes passing completely through the article

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D2273/20 - High temperature filtration
B01D46/005 - {Crossflow filtration, i.e. having an inlet and two outlets}

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C04B2111/00793 - {as filters or diaphragms}

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DOE Contract Number:: FG02-94ER81718

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; producing; monolithic; ceramic; cross-flow; filter; various; configuration; particulates; hot; gases; exhausted; coal-fired; systems; prior; filters; favored; types; previously; horn; assemblies; fastened; consequently; subject; distortion; delamination; exposure; gas; normal; seamless; one-piece; construction; prone; failure; products; novel; casting; process; involves; key; steps; demolding; green; fragile; inner; walls; cracked; broken; inner wall; hot gas; hot gases; inner walls; casting process; monolithic ceramic; ceramic filter; ceramic cross-flow; gases exhausted; various configuration; /264/55/

Citation Formats


                    Larsen, David A, Bacchi, David P, Connors, Timothy F, and Collins, III, Edwin L. Method of producing monolithic ceramic cross-flow filter.  United States: N. p., 1998. 
        Web.

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                    Larsen, David A, Bacchi, David P, Connors, Timothy F, & Collins, III, Edwin L. Method of producing monolithic ceramic cross-flow filter.  United States.

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                    Larsen, David A, Bacchi, David P, Connors, Timothy F, and Collins, III, Edwin L. Thu .  
        "Method of producing monolithic ceramic cross-flow filter".  United States.  https://www.osti.gov/servlets/purl/871359.

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@article{osti_871359,

  title        = {Method of producing monolithic ceramic cross-flow filter},

  author       = {Larsen, David A and Bacchi, David P and Connors, Timothy F and Collins, III, Edwin L.},

  abstractNote = {Ceramic filter of various configuration have been used to filter particulates from hot gases exhausted from coal-fired systems. Prior ceramic cross-flow filters have been favored over other types, but those previously horn have been assemblies of parts somehow fastened together and consequently subject often to distortion or delamination on exposure hot gas in normal use. The present new monolithic, seamless, cross-flow ceramic filters, being of one-piece construction, are not prone to such failure. Further, these new products are made by novel casting process which involves the key steps of demolding the ceramic filter green body so that none of the fragile inner walls of the filter is cracked or broken.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {1}

}

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