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US 9,803,319 B2Granted
Press roll comb plate and related method
AssigneeAndritz Inc.
InventorGregory Hallas
Life of this patent
Estimating the term…
Abstract
The problem of deck channel rewetting that occurs when a drainage chamber in a roll upwardly approaches a horizontal line extending past the horizontal diameter of the roll is solved by using a comb plate comprising at least one comb tooth engaging the perforated plate and extending through a deck channel to a drainage channel such that the at least one comb tooth has a slope configured to direct a slurry suspension from the perforated plate into the drainage channel.
Claims15
A roll press deck channel anti-rewet assembly comprising:
- a roll having support ribs arrayed across a length of the roll,
- wherein adjacent support ribs define drainage channels, and wherein ends of the drainage channels are disposed at ends of the roll;
- a deck disposed on tops of the support ribs,
- wherein the deck comprises deck rings defining a deck channel communicating with a top of the drainage channels and a perforated plate disposed on a top of the deck rings,
- wherein the perforated plate has areas defining perforations in communication with the deck channel;
- and
- a comb plate disposed under the perforated plate, the comb plate comprising a comb tooth extending through the deck channel toward at least one of the drainage channels, the comb tooth having a first end disposed on a back of the perforated plate and a second end opposite the first end disposed in at least one of the drainage channels,
- wherein the first end and the second end of the comb tooth define a slope configured to direct filtrate from the perforated plate through the deck channel and into at least one of the drainage channels.
5 more elements
A method for installing a comb plate and anti-rewet plate comprising:
- stopping rotational movement of a roll in a roll press, wherein the roll has support ribs arrayed across a length of the roll, wherein adjacent support ribs define drainage channels, wherein ends of the drainage channels are disposed at ends of the roll, wherein the roll further comprises a deck disposed on tops of the support ribs, the deck defines a deck channel communicating with a top of the drainage channels, and wherein a perforated plate is disposed on a top of the deck and defines an outer surface of the roll, and wherein the perforated plate defines perforations in communication with the deck channel;
- removing the perforated plate exposing ends of the drainage channels;
- inserting a comb plate along a length of at least one of the drainage channels, the comb plate comprising a comb tooth, wherein the comb tooth does not extend into the deck channel;
- tilting the comb plate such that the comb teeth extend into the deck channel and such that comb plate will be disposed under the perforated plate after the perforated plate is reinstalled, and such that the comb plate extends through the deck channel toward the at least one of the drainage channels, the comb tooth having a first end that will be disposed on a back of the perforated plate after the perforated plate is reinstalled and a second end opposite the first end disposed in the at least one of the drainage channels, wherein the first end and the second end of the comb tooth define a slope configured to direct filtrate from the perforated plate through the deck channel into the at least one of the drainage channels;
- securing the comb plate to a support rib of the at least one of the drainage channels;
- and reinstalling the perforated plate to define an outer surface of the roll.
3 more elements
Dependencies are inferred from the claim text.