The Application of Titanium in
Sodium Hypochlorite
1.
Introduction
of Sodium Hypochlorite
Sodium Hypochlorite (or bleach) is a
key component in thousands of production and disinfection processes in a
variety of industries. It can be used to disinfect drinking water, prevent the
growth of algae and shellfish, control odors in water and wastewater treatment plants,
and much more.
2.
Materials of
Construction
2.1 Storage
Tank
Many different types of materials are used for sodium
hypochlorite. and the main product use titanium is storage tanks.
Titanium storage tanks are the best choice of material
for sodium hypochlorite. . The grade typically used is commercially pure grade
2. Although, the cost of titanium storage tanks is expensive much more than
carbon steel or other materials, but titanium tanks can used for there is a
very unusual requirement for virtually unlimited service life with no failures
allowable.
For example, Some tanks may only last 3-5 years,
others if properly specified and maintained could last 10-15 years. The only
material known for over 30 years service life is titanium.
Normally, titanium tanks are used for process tanks to
handle special applications such as pressure reactors or small process tanks if
time for repairs can not be tolerated.
2.2 Titanium
Fittings for Sodium Hypochlorite.
Flanged fittings
with titanium bolting should be used if the tank does not have an integrally
molded in, full drain fitting for larger tanks.
Titanium bulkhead
fittings can also be used but they tend to not be as reliable as a flanged
fitting although this is probably arguable as well.
Although PVC
fittings are less expensive, but titanium fittings basically last forever. So
many installations utilize titanium 150# flat faced backing flange with
titanium bolts welded in the flange.
2.3 Other metals in Sodium Hypochlorite
For metals in
contact with sodium hypochlorite, the majority of construction for all process
equipment is titanium.
Tantalum is used
for electrodes in magnetic flow meters and diaphragm seals.
Silver and
Platinum is used for electrodes used to measure oxidation-reduction potential.
There should be no
other metal in contact with sodium hypochlorite.
2.4 Titanium Pumps
The choice of
pumps for sodium hypochlorite depending on the application can be separated
into centrifugal and positive displacement such as diaphragm or peristaltic. In
all applications, the only metal acceptable is titanium.
One of the best pumps for sodium hypochlorite is a
titanium centrifugal pump.
2.5 Titanium Pipe
Lightweight schedule 5 and 10 titanium pipe can be
used for very long runs for sodium hypochlorite. These are welded systems with
carefully designed expansion joints.
In some larger piping systems, titanium can be a cost
effective method of piping compared to a lined pipe system and better
performance can be achieved since most flanged joints are avoided. These piping
systems are typically only used in sodium hypochlorite manufacturing facilities
because of their high cost.
2.6 Instrumentation
The most important item concerning instrumentation is
that only titanium, tantalum components be used for contact with the sodium
hypochlorite. For PH, ORP and magnetic meter electrodes, silver, platinum,
gold, tantalum or titanium are the only materials acceptable if a metal is
required.
3.
Common
Titanium Product Type
3.1 Titanium
Plate & Sheets for Storage Tanks, Pressure Vessels, Reactors
3.2 Titanium
Pipes for Hypochlorite Pipe
3.3 Titanium Fittings,
Flanges for welded systems in Sodium Hypochorite
3.4 Titanium
Chlorite Interface, Chlorite Connectors
3.5 Titanium
Bolts, Nuts, Washers and so on…
All above is the application of Titanium materials in
Sodium Hypochlorite Industrial. If you have any question or needed please don’t
hesitate to contact us to discuss more!
