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Rinse Recovery Systems
Sustainable Solutions for the Galvanizing Industry
B eta’s breakthrough development of an automated water recovery
system based on proprietary, acid-proof membranes provides
galvanizers with an unbeatable solution to contaminated rinse water.
Beta’s new process combines the best in environmental technology
with the best return on investment. We provide sustainable solutions
to meet both environmental and financial goals.
Advantages:
Maintains excellent quality rinse water
Lowers zinc consumption
Improves product quality
Lowers operating cost
A clean rinse maintains a
proper flux bath & minimizes
the contamination
of the kettle.
Lowers zinc consumption
Most galvanizers try to maintain gross zinc usage
between 4% and 5% per ton of steel galvanized. This zinc
usage target includes the zinc on the product as well as
dross formed in the kettle and zinc lost in the process.
Industry studies show that highly contaminated rinse and
flux tanks produce zinc consumption figures between 6%
and 10%.
A poor rinse practice results in: a) increased formation of
dross, b) increased product kettle immersion time
creating thicker coating, and c) greater zinc spatter and
smoke.
A clean rinse maintains a proper flux bath and minimizes
the contamination of the kettle. For example, a plant
galvanizing 1,000 tons of steel:
1% greater Zinc consumption / 1,000 tons galvanized ≈
$20,000 USD additional Zinc cost
1 kg Iron ≈ 40 kg Zinc (dross)
Maintains excellent rinse water
Beta’s membrane-based system applies a combination
of proprietary acid-resistant, high performance
membranes and corrosion-proof components to filter
metal salts and acid contaminants from rinse water.
The removal of these salts minimizes the carryover of
damaging contaminants into the flux and kettle.
The concentrated acid and salts removed from the
rinse tank are returned to the pickle tank and do not
create a waste product. The clean, iron-free water
returns to the rinse tank.
Fe+
+
into
kett
le
(kg/y
ear)
Annual Iron into Kettle
Rinse methods
Membrane
Recovery Flowing
Countercurrent
Static
Operation
Our filter pump drives the contaminated rinse water through a 5 micron pre-filter to remove solid contaminants and some oils and
organics. A pressure transmitter monitors the incoming fluid to protect the pump from running dry and to signal a filter change.
The solution exits the pre-filter and enters the high pressure diaphragm pump that provides the osmotic force for the process. The
pump drives the pre-filtered rinse brine across the special, PVDF membranes at a high velocity. These membranes are designed to
reject larger molecules, such as iron and zinc salts, while allowing smaller molecules, like water, to pass through. The high velocity
of the solution keeps the membrane surface clear of solids and any concentration polarization that would slow the process.
The cleaned water and small salts passing through the membrane form the permeate stream which returns to the rinse tank. A
small volume of water plus the large iron and zinc salts form the concentrate stream which returns to the pickle tank when the
optimum concentration of salts is reached. The volume of the concentrate stream matches the pickle tank volume lost by evapora-
tion and drag out.
The process operates continuously and automatically to remove contaminants from the rinse tank. If the level of contaminants
decreases, the system shuts itself down. Beta’s software offers automated control, safety alarms, and process tracking.
Improves product quality
Contaminated flux produces a dull finish, black spots,
poor coverage, and increased rejects. A clean rinse pro-
tects the flux and kettle from iron contamination. The
graph shows contamination levels resulting from differ-
ent rinse practices. Beta’s Rinse Recovery Membrane
System most effectively reduces the carryover of iron,
thus eliminating salt spotting and black spots on the
surface of the parts.
Flux treatment and replacement is expensive and pro-
duces a hazardous waste. Galvanizers tend to delay
cleaning or replacing a flux due to this high cost, further
damaging product quality.
Lowers operating cost
Beta’s rinse recovery system requires only 3 KW/hr of
electricity to continuously process the rinse. The system
requires no chemicals and costs less than 30% of the
alternative technologies to own and operate. The sys-
tem has a very small installed footprint and runs with-
out an operator. Since it produces no increased disposal
cost or environmental liability, this process is the least
expensive and most sustainable process available. The
system typically pays for itself within a few months.
Sustainable solutions
Beta designs, manufactures, installs, and supports its
own resource recovery equipment. We provide cost
effective, robustly engineered systems that recover
your assets and attain your company’s
environmental and financial goals.
U.S.A. (headquarters)
6950 SW 111th Ave, Beaverton, OR 97008
phone: 503-646-3399, fax: 503-627-0888
Email: [email protected]
BRAZIL, Beta Systems Brazil
Mr. Rodrigo Frigo, Phone: 55(44) 3028-3335
CHINA, Beta Systems China
Ms. Smile Lee, Phone: 86-411-859-12755
INDIA, Leak-Proof Steel Plant Equipment
Mr. Arvind Joshi, Phone: 91 22 2636 1737
MALAYSIA, East West Wire Technologies
Mr. Lim Tee Hooi, Phone: 603-5162 3846
MEXICO, Tecmex
Ing. Daniel Pietra Santa
+52 (55) 1107-7582, [email protected]
REPUBLIC OF S. AFRICA, VJL Technologies
Ms. Marinda J van Rensburg
Phone: 27(0)12 345 2215
TAIWAN, Yongsun Corporation
Mr. Frank Shy, Phone: 886-2-2881-7288
TURKEY, ANI Zinc Oxide & Metal Ltd.
Mr. Isik Sapci, Phone: 90 312 2875510
UNITED KINGDOM, Chem Resist Groupe
Phone: 44-1924-499466