Dessicant Brochure.cdr - The Home of The Little Metal Shop

Engineered Chemistry™
Engineered Chemistry™
515 Post Oak Blvd., Suite 600
Houston, Texas 77027
Phone: 713-693-4000
www.weatherford.com
Weatherford products and services are subject to the Company’s standard terms and
conditions, available on request or at www.weatherford.com. For more information contact an
authorized Weatherford representative. Unless noted otherwise, trademarks and service marks
herein are the property of Weatherford. Specifications are subject to change without notice.
© 2005. Weatherford. All rights reserved. Brochure #705.01
Dehydration with Deliquescent
Desiccant Tablets
Ease of Use
Weatherford Desiccants
Dehydration with deliquescent desiccants from Weatherford
Engineered ChemistryTM products is simple. The wet stream flows
through a vessel that contains a bed of desiccant. Moisture is
absorbed on the desiccant surface and begins to dissolve the
desiccant salt. The resulting salt solution is still hygroscopic, and
continues to attract water. As more water accumulates on the
desiccant tablets, droplets form and drip into a sump at the bottom
of the vessel. As this liquid level increases, it can be automatically or
manually discharged. The only by-product is common brine water,
which can be easily disposed. There is no regeneration; new
desiccant is simply added to each dryer when needed.
(Shown by Increasing Hygroscopicity)
DIRECT COMPRESSION TABLETS are formed using a traditional tablet-making process in which raw
materials are ground and mixed, then formed into tablets on a rotary press with 15 tons of force.
This yields a hard, non-porous tablet that is far superior to granules or briquettes. The uniform shape
provides for consistent surface area, efficient packing and minimal dust, and eliminates blooming,
caking and plugging in the dehydration system.
Industrial Desiccant
Designed specifically for air-drying, this desiccant removes enough moisture to
reduce the dew point by 20°F (-6.7°C) or more, depending on the incoming
temperature, at an extremely low cost.
Desiccant RG™
Widely used for first-stage dehydration; to reduce operational problems; or
where dehydration requirements are not severe. In higher-pressure applications,
Desiccant RG tablets often yield acceptable moisture content at an extremely low
cost. (Recommended at operating temperatures below 80°F (26.7°C).
Desiccant HT
Used in high-temperature applications to reduce operational problems.
Desiccant HT inhibits fluid crystallization and reduces sump clogs, while
still yielding low-cost operation. (Recommended at operating
temperatures below 120°F (48.9°C).
Desiccant SG™
Our highest-grade direct-compression tablet is commonly used in final stage of
dehydration for polish drying. At 40°F (4.4°C) and 100 PSI (689 kPa), outlet moisture
content is below 0 lb (0 kg)/MMCF.
Operating Cost versus Pressure
at various temperatures
$0.25
Cost per mcf, US$
$0.20
EUTECTIC DESICCANTS represent the most advanced technology in gas-drying deliquescents. The
eutectic pellet, a homogenous crystalline form, virtually eliminates the problems of tablet
compression, tablet disintegration and dusting.
Description Here
Hydro-Lith™ E
With Hydro-Lith E, 20-lb (9-kg) moisture/MMCF is attainable at pressures as low as
50 psi (345 kPa) at 60°F (15°C), and 7-lb (3.2-kg) moisture/MMCF at pressures as
low as 125 PSI (862 kPa) at 60°F (15°C).
$0.15
$0.10
Xentrite®
Developed to meet dew points in low-pressure (<75 PSI) and low-flow rate
applications. Can be used alone or in combination with other grades of dessicant.
With Xentrite tablets, 7-lb (3.2-kg) moisture/MMCF is attainable at pressures as low
as 50 PSI (345 kPa) at 60°F (15°C), and 20-lb (9-kg) moisture/MMCF at pressures as
low as 25 PSI (172 kPa) at 80°F (27°C).
$0.05
$0
100
200
300
400
500
600
700
800
900
1,000 1,100 1,200 1,300 1,400
Pressure, PSIG
50°F (10°C)
© 2005. Weatherford. All rights reserved.
60°F (15.5°C)
70°F (21°C)
80°F (27°C)
90°F (32°C)
Drying Applications
• Air
• Diesel/kerosene or other
petroleum distillates
• Olefins
• Acetylene
• Solvents
Advantages
• Easy installation
• No costly disposal
• Simple operation
• No fire hazard
• Low maintenance
• Low, predictable operating costs
• Low capital expenditure
NATURAL GAS VEHICLE DRYING
Xentrite® NGV™
Incredibly hygroscopic, and used extensively in Natural Gas Vehicle refueling
stations. In a typical station operating at 100°F (37.8°C) and 3000 PSI (684 kPA),
outlet moisture content is as low as 0.25-lb (0.11-kg)/MMCF. Low moisture content
is very important in NGV systems to prevent hydrate formation.
© 2005. Weatherford. All rights reserved.