Method for removing the precoat layer of a rotary filter
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United States of America Patent
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May 2, 2017
Grant Date -
Oct 15, 2015
app pub date -
Feb 5, 2013
filing date -
Feb 6, 2012
priority date (Note) -
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Abstract
A method associated for treating a precoat on a rotating filtering surface of lime sludge filter including: accumulating a precoat of lime sludge on the filtering surface by rotating the filtering surface in a first direction through a lime sludge slurry; after accumulating the precoat, rotating the filtering surface in an opposite direction to the first direction; while rotating the filtering surface in the opposite direction, spraying a liquid onto the precoat on the filtering surface wherein the spraying is applied to the precoat above a scraper adjacent the filtering surface and the spraying removes at least a portion of the precoat from the filtering surface, and flowing the removed precoat over the scraper and into a basin.
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