Filter apparatus belt filter medium control and treatment
OwnerSteve C. Benesiinventor
Life of this patent
Estimating the term…
Abstract
A filter belt movement control and belt treatment means for a pressure filter apparatus. The movement control includes a marking means in or on the filter belt medium and a sensing means on the filter apparatus. The sensing means detecting the position of the marking means in or on the belt filter medium and adapted to signal a controller for control of the position of the belt filter medium within the apparatus. The treatment means including cleaning, bathing and coating means for treating the belt filter medium and vibratory means for operation with the treating means.
Claims20
A filter apparatus having a belt filter medium for pressure filtering fluid slurry materials containing liquid and solid materials in a filter chamber and for creating a substantially dry filter cake of said solid materials on said belt filter medium, said apparatus having mechanical means for opening and closing said filter chamber and for controlling said filter apparatus including means maintaining said chamber closed and under pressure during filtering operations and for opening said chamber after filtering has been completed, belt drive means for positioning said belt filter medium within said filter chamber when said chamber is opened and pressure sealed within said chamber when said chamber is closed, said belt drive means including sensing means positioned with respect to said filter chamber for sensing the position of said belt filter medium with respect to said upper and lower plate members and for controlling operation of said belt drive means, and means for treating said belt filter medium before and after belt movement into and out of said filter chamber, said filter apparatus and said treating means including:
- a continuous belt filter medium,
- means for treating said belt filter medium comprising means outside of said filter chamber and aligned with said filter chamber,
- said continuous belt filter medium including a plurality of detectable marking means along the length of said belt, said plurality of marking means being separated by a distance larger than said largest lateral dimension of said filter chamber,
- and said marking means being adapted to cooperate with said sensing means of said belt drive means and said means for treating said belt filter medium for
- i) controlling operation of said belt drive means to position said belt filter medium within said filter chamber and within said means for treating said belt filter medium,
- ii) and controlling operation of said means for treating said belt filter medium to prepare said belt filter medium for performing repeated pressure filtering operations.
The filter apparatus of claim 17 wherein said means for treating said belt filter medium outside of said filter chamber includes means for backwashing said belt filter medium.
A method for treating a continuous belt filter medium mounted on a filter apparatus having a filter chamber, belt treating means outside of said filter chamber and means for moving said belt filter medium sequentially through said filter chamber and said belt treating means, comprising the steps of:
- a) positioning a first portion of said belt filter medium within said filter chamber for a filtering operation adapted to separate a slurry having solids and liquids and for retaining said slurry solids on said belt filter medium,
- b) positioning said first portion of said belt filter medium within said belt treating means,
- c) cleaning said first portion of said belt filter medium in said treating means to remove said slurry solids from said belt,
- d) applying materials to said first portion of said belt filter medium in preparation for reentry of first portion of said belt filter medium into said filter chamber,
- e) and sequentially repeating the above steps a), b), c) and d) on sequential portions of said continuous belt filter medium.
Dependencies are inferred from the claim text.