1. The PTS – Evodos Advantage
New Methods for Mechanical Dewatering of Waste
Example Projects
Tailings Treatment Slop Oil Treatment Drilling Fluids
Evodos overcomes 4 inefficiencies in standard centrifuges:
1) Long settling distance: A particle entering the bowl must
accelerate as it moves outward making a long settling
distance. Evodos plates reduce the distance to < 7 mm.
2) Maintaining laminar flow in a dynamic settler: Settling is
optimized under Stokes Law conditions, flow in Evodos is as
close to laminar as possible. Energy capture when
decelerating liquid effluent accelerates feed.
• Drilling fluids accumulate fine
clays that must be removed.
• Evodos DSP removes clays in
oil to 1 µm.
• >80% solids removal over a
range of diesel and synthetic
oil based fluids.
• d50 drops from 8 µm to 0.9
µm.
No polymer
• Cake produced was 67% wt to
80% wt solids.
• Centrate < 2% wt solids
With polymer.
• Enhanced mineral capture
>99%.
• Centrate <0.2% wt solids.
• Cake water content increases
by at least 10%.
• Cake has less strength.
• We deploy Evodos as a
component in slop oil
processing.
• Use conventional equipment
to increase efficiency
• Recover high quality sales oil
and minimize or eliminate
amendments for solids going
to landfill.
1200, 707 – 7th Ave SW, Calgary. Tel: (403) 370-9305,
email: sales@purlucid.com, www.purluicid.com
1) An efficient and robust discharge system: Evodos discharge
necessitates a semi-batch process but results in fully cleaned
plates, with low moisture cake and no packing-off.
2) Easy servicing: All high wear components are located in an
exchangeable cassette with full servicing completed by one
technician in under 3 hours. The cassette is refurbished at our
shop for the next exchange.
Cake from Evodos treatment of MFT
0,1 1 10 100 1000 10000
0,0%
0,5%
1,0%
1,5%
2,0%
2,5%
PARTICLE SIZE [MICRONS]
WT%SOLIDS/WTFEEDWEIGHT
Averaged PSD: Feed, Product, Cake
feed Treated OBM
Weight 1.1 0.91 Kg/l
Oil water ratio 85/15 96/4 %
Electrical
stability
822 1893 ES
Viscosity 17.8 11.2 cP
Particle size distribution
D10 D50 D90
Feed 2.36 7.95 35.91
Product 0.45 1.12 3.52
PTS Waste oil processing facility
High value oil recovery from 50% to 80% BS&W
Recovered oil < 0.5% BS&W, clean water and solids
Solids (%wt) Strength (kPa)
Input
MFT ~34
Middlings ~8
Output MFT
Cake 70 to 80 >7
Centrate 0.2 to 2 NA
Output Middlings
Cake 60 to 70 >5
Centrate 1 to 2 NA