Filter element and method for the manufacture
OwnerKerry Johnson, Olli Hognabba +1inventors
InventorsKerry Johnson, Olli Hognabba, Bjarne Ekberg
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Abstract
The invention relates to a filter element and its manufacture to be used in removal of liquid from solids containing material to be dried in a capillary suction dryer which filter element contains a ceramic microporous layer having the pore size under 5 micrometer and supported by a ceramic internal layer having recess areas for liquid flowing. The internal layer is made of at least one substrate which continuously surrounds at least one recess area and which ceramic internal layer is surrounded by at least one essentially continuous microporous surface layer.
Claims23
Filter element to be used in removal of liquid from solids containing material to be dried in a capillary suction dryer which filter element contains a ceramic microporous layer having the pore size under 5 micrometer and supported by a ceramic internal layer having recess areas for liquid flowing, wherein the internal layer is made of at least one substrate which continuously surrounds at least one recess area and which ceramic internal layer is surrounded by at least one essentially continuous microporous surface layer.
Method for manufacturing a filter element to be used in removal of liquid from solids containing material to be dried in a capillary suction dryer which filter element contains a ceramic microporous layer having the pore size under 5 micrometer and supported by a ceramic internal layer having recess areas for liquid flowing, wherein the method contains at least the steps:
- 1) a ceramic mix for the substrate is partly charged into a mold,
- 2) a core material for at least one recess area is added to the ceramic mix,
- 3) the rest of the ceramic mix for the substrate is charged into the mold,
- 4) the ceramic mix with the core material is pressed,
- 5) the ceramic mix with the core material is sintered at the temperature range of 1150-1550° C. for creating the substrate,
- 6) the substrate is covered by a ceramic microporous material,
- 7) the substrate covered by the ceramic microporous material is sintered at the temperature range of 1150-1550° C. for creating a filter element.
Dependencies are inferred from the claim text.