US 10,022,662 B1Granted

Wet dust extractor with a separator for dewatering particulate matter suspended in water

OwnerTimothy Wayne Wardeninventor

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Abstract

The disclosed technology regards a wet dust extractor system with a water/solids separator for filtering slurry from the extractor into residue cakes and filtrate water, and related methods of removing dust from an industrial environment and dewatering resulting sludge. The wet dust extractor system has an air inlet, an impeller fan, and an extraction panel. Water is injected at the inlet of the fan impeller, where it is spun with the incoming dust laden air; the resulting slurry then passes to the extraction panel, which removes the slurry from the system by means of a discharge sump. The slurry then is pumped or otherwise delivered to the separator for filtering slurry into residue cakes and filtrate water. The separator includes a frame supporting a plurality of rollers supporting a filter media belt, a plurality of blades and wipers for cleaning the rollers and removing excess filtrate water and cake material, and an inlet water manifold to distribute slurry water uniformly on the filter media belt. The frame supports a filter bed, with a slurry receiving area having a perforated panel at its base, for receiving, pre-filtering and moving the slurry through the separator, and a filter bed collection tub with an exit aperture for collecting and delivering filtrate to a water holding tank. The filter media belt traverses the plurality of rollers, through and about the filter bed, supported along a portion of its path by the perforated panel. Both a residue cake bin and a clean water holding tank may be provided with the system to collect residue and filtrate water, respectively, for re-use or disposal.

Claims16

Dependent claims

A wet dust extraction system for extracting dust from industrial environments, coupled with a water/solids separator for filtering slurry into residue cakes and filtrate water, the system and separator comprising

a. The wet dust extraction system comprising:
i. an air inlet,
ii. a radial impellor fan having a water inlet,
iii. an extraction panel, and
iv. a discharge sump,
wherein water is injected by means of a spray header, at the inlet of the fan impellor, and
b. the separator comprising a frame supporting a plurality of rollers, the plurality of rollers comprising:
i. four or more filter media idler rolls to support a filter media belt,
ii. a drive roll, wherein the rotation of the drive roll is powered by a gear motor,
iii. a filtrate press roll positioned above, and in near vertical alignment with, the drive roller, and
iv. a NIP roll positioned below and in near vertical alignment with the drive roll, and
c. an inlet water manifold comprising a plurality of pipes and pipe fittings to distribute slurry water uniformly on the filter media belt, receiving slurry water from the wet dust extraction system,
d. a filter bed having a slurry receiving area defined by a leading edge and a trailing edge, with a perforated panel at its base, for receiving, pre-filtering and moving the slurry through the separator, and further having a filter bed collection tub with an exit aperture for collecting and delivering filtrate to a clean water holding tank,
e. a filter media belt traversing the plurality of rollers, and supported along a portion of its path by the perforated panel,
f. a residue cake bin, and
g. a plurality of blades and wipers for removing filtrate water and dewatered residue from the filter media belt and the rollers, the plurality of blades and wipers comprising a roll scraper blade coupled with the filtrate press roll, and
wherein the frame supports the filter bed above the residue cake bin.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/095,493Filed 11 Apr 2016 · us provisional application
Priority: 11 May 2015
Granted: 17 Jul 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B01D 47/06
Separating dispersed particles from gases, air or vapours by liquid as separating agent: spray cleaning
B01D 33/04
Filters with filtering elements which move during the filtering operation: with filtering bands or the like supported on cylinders which are…
B01D 33/466
By scrapers, brushes nozzles or the like acting on the cake-side of the filtering element: scrapers
B01D 33/646
By compression: by pressure rollers