Importance

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Abstract

A frustum filter used for separation of cation and anion exchange resins, which is used in condensate water polishing system or apparatus, wherein said frustum filter comprises a microporous filtering net body (1) which is formed by sintering a mixture of silicon carbide grains and a binder, said net body being provided with a plurality of micropores, the diameter of said micropores being in a range of 50-300 micron, said filtering net body (1) being shaped as an inverted truncated cone and its maximum diameter being in a range of 50-200 cm, the angle between a inner tapered face and a horizontal plane being in a range of 15°-30° and the thickness of said filtering net body being in a range of 2 cm-14 cm. Some reinforcing steel bars which have the property of high temperature resistance are embedded in said filtering net body(1) in advance. A steel ring (6) welded at the housing (2) is fixed on the external circumference of said filtering net body (1). This invention has the following advantages: it can distribute evenly water and has high strength; it can not be blocked easily and will not create dead zones when filtration; the product of the invention has high strength and cannot be deformed easily over the prior art; it also has the properties of strong acid fastness, strong alkali fastness, high temperature resistance, oxidation resistance.

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First Claim