Katadyn PowerSurvivor 40E, Руководство пользователя

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Energy Recovery
The technology behind Katadyn reverse osmosis watermakers
Reverse osmosis desalination was first developed in the mid 1950’s. It was a major breakthrough in
desalting technology, but the original process required a lot of power. By recovering 90% of the
energy lost in conventional reverse osmosis systems, we’ve made small desalinators practical, so you
can have freshwater when and where you need it.
Conventional Reverse Osmosis Desalination
The lower left portion of
Figure
2 shows the basic principle of
reverse osmosis desalination.
When saltwater is forced
through a semipermeable
membrane at high enough
pressure (typically 800 psi) pure
water will pass through the
membrane, but salts will not.
The membrane acts as a barrier
to contaminants such as salts,
viruses and bacteria, separating
them from the pure water.
When seawater is forced
against a membrane, only 10%
passes through as pure water. In
a conventional system, the
remaining waste brine stream,
still under high pressure, passes
through a pressure-reducing
valve and is discharged overboard. For every gallon of pure water made, up to ten gallons of
seawater must be pressurized! Therefore, 90% of the energy used in conventional reverse osmosis is
lost!
Energy Recovery Makes It Possible
The upper right portion of
Figure 2
illustrates how
Katadyn systems are configured to recover and effectively re-use the energy wasted in conventional
reverse osmosis. The waste brine stream contains up to 90% of the energy expended. By recovering
this energy, we are able to dramatically reduce the power needed to desalt seawater.
To do this, we developed and patented a high pressure energy recovery pump. It recycles the high-
pressure brine by redirecting it to the backside of the pump’s piston. By balancing the opposing force
on the piston’s front side, the brine provides a power assist to the pumping operation. Seawater can
then be pressurized with much less effort.
Katadyn Watermakers
Katadyn watermakers are simple, affordable, energy efficient and
easy to use and maintain. The PowerSurvivor 40E represents the latest advancements in watermaker
technology, featuring an improved grease lubricated drive assembly, an all-316 stainless steel pump
body, and simplified construction for easier and less frequent maintenance.