Patent ID: 6843379

Claim:
Filter element with improved corrosion and heat resistance and structural properties, to be used in filtering solids containing material, in order to achieve a filter cake of solid material on at least one external surface area of the filter element, the filter element being enclosed within a frame, the filter element being provided with a plenum for removal of filtrate from the filter element, at least one corrosion and heat-resistant polymer based material being bonded to and covering areas that surround an external surface area on which the filter cake is formed and an external surface area of the filter element which is in contact with the frame of the filter element, the heat resistant polymer based material not covering and not being bonded to the external surface area of the filter element on which the filter cake is formed, the corrosion and heat resistant polymer-based material sealing the edges of the filter element and compressing the frame to the filter element, the polymer-based material being capable of maintaining said bonding when exposed to a corrosive acidic environment, wherein the filter element is capable of being attached to a suction dryer, such that elimination of filtrate to the suction dryer occurs through a single orifice, the filtrate entering the plenum and subsequently being conducted through the orifice, and wherein the filter element is provided with a fine porous suction surface, where radii of the fine pores of the suction surface are mainly within the range of 0.5 to 2 micrometers.