Abstract: An improved hot gas filter candle is disclosed including an increase density flange portion adjacent the top of the filter for improving candle service life when the candle is mounted on a tube sheet. The area of flange densification is extended to a position beyond the bottom of the tube sheet. During vibration or swaying of the candle only the denser portion of the candle may impinge on the edge of the tube sheet aperture on which the candle is mounted Further, the denser portion of the candle is not so porous as to draw dirty particles into the clearance between the candle and the tube sheet aperture creating an area of increased stress in the candle adjacent the bottom of the tube sheet aperture.

Abstract: An improved cross flow ceramic filter is disclosed for utilization in high temperature, high pressure applications such as found in hot gas cleaning in coal based power generation. The cross flow ceramic filter of the present invention includes a plurality of identical corrugated sheets composed of chopped ceramic fiber matrix material and a plurality of predetermined sized end blocks shaped to fill the cross section passageways formed between the partly spaced corrugations of adjacent sheets of the filter material. One advantage of the corrugated sheet cross flow filter of the present invention is that the filter may be shipped to its site in semi-cured form unassembled. When the filter is received on site, the corrugated sheets are partially separated from each other until passageways of the desired dimension are achieved. Thereafter, the end blocks and glue may be applied between the blocks and the ends of the corrugated sheets and between the apexes of the corrugations where the corrugated sheets overlap.

Abstract: A high temperature pressure filter utilizes a rigid ceramic support plate separating a pressure tank into respective inlet and outlet pressure chambers. The support plate has a hole therein and a hollow ceramic filter element is disposed in one of the pressure chambers and mounted to the support plate over the hole therein.