초록 ▼

The invention provides a high temperature, damage tolerant candle filter (4) made of a porous ceramic material which is designed so that, if it fails, it does not fail catastrophically. The ceramic candle filter includes a hollow tube (14) having an open end, a closed end and a porous outer wall the

The invention provides a high temperature, damage tolerant candle filter (4) made of a porous ceramic material which is designed so that, if it fails, it does not fail catastrophically. The ceramic candle filter includes a hollow tube (14) having an open end, a closed end and a porous outer wall therebetween. The porous wall is made of a fiber ceramic reinforcement material impregnated with ceramic particles and a fugitive material that is substantially removed from the fiber ceramic reinforcement material or partially converting into a permeable material to provide porosity. The reinforcement material is generally strong enough to absorb the initial explosion force created when the ceramic particle carrier fails during, for example, reverse pressurization of the candle filter, thereby preventing the ceramic pieces from becoming projectiles.

대표청구항 ▼

[ What is claimed is:] [1.] A candle filter comprisinga hollow tube having an open end, a closed end and a porous wall therebetween,the porous wall comprising a layer of ceramic foam containing the majority of the porosity of the wall, said wall formed from a flexible reinforcement layer impregnated

[ What is claimed is:] [1.] A candle filter comprisinga hollow tube having an open end, a closed end and a porous wall therebetween,the porous wall comprising a layer of ceramic foam containing the majority of the porosity of the wall, said wall formed from a flexible reinforcement layer impregnated with ceramic particles and a fugitive material that is substantially removed or converted during sintering to provide porosity;wherein the fugitive material comprises a convertible material that is at least partially converted into a permeable material during sintering at temperatures between about 500.degree. F. to 2000.degree. F.;wherein the convertible material is an inorganic precursor that is converted into a glassy material and reacted with small particles to form a crystallized phase that is substantially resistant to sulfate and sodium oxide.