For those products with
extremely high fouling
potential, or those which
benefit from constant
agitation, then the HRS R
Series of rotating scraped surface
heat exchangers is ideal.
Designed for hygienic food industry
applications, the R Series from
HRS heat exchangers uses a rotary
scraper rod which is capable of
reaching a speed of 300 rpm,
providing high levels of shear and
mixing at the heat transfer surface
which dramatically increases
heat transfer rates. This makes it
particularly suitable for challenging
heat transfer applications, such as
those where the product requires
high pressures, has high viscosity,
or where aeration is required.
The scraper rod features both a
helical mixing spiral (which reduces
the pressure drop in the tube) and
a series of scraper blades. Together
these provide a continuous scraping
action which mixes highly viscous
products and reduces fouling.
The unique design enables high
viscosity products to be pumped
with reduced back pressure and
lower energy use, in a compact
unit which features a much smaller
footprint than traditional heat
exchangers for similar applications.
A unique gearbox design not
only reduces noise, but also
allows multiple tubes to be fitted
inside a single shell from a single
electrical drive, further increasing
the available heat transfer area
within the same shell footprint and
aiding maintenance. Cleaning and
maintenance is further improved
by the unique sealing system
used in the R Series which allows
individual tubes to be removed for
easy servicing and replacement if
necessary.
Thanks to its helical spiral, in many
applications the R Series can also
be run in reverse, enabling much
valuable product to be recovered
before routine cleaning-in-place
or product change-over without
the need for additional pigging or
flushing systems. Not only does this
reduce costs and complexity, but
saving product adds dollars to the
bottom line.
HRS Heat Exchangers Pty Ltd,
director, Chris Little says: “Normally,
when processing dense, viscous
or sticky products such as minced
meat, a certain amount will adhere
to surfaces. This greatly reduces
heat transfer, meaning that longer
exposure is required to compensate.
With its clever scraper design the R
Series overcomes this problem, and
also reduces product losses which
Different materials need
different types of heat
exchangers. For the most
simple fluids such as water,
plate heat exchangers are
often sufficient, but as
products become more
challenging (such as
minced meats, spreads or
egg-based products), then
different types of tubular
and scraped surface heat
exchangers are required.
FT674
can soon add up. The R Series
can be emptied of the majority of
the product without the need for
any additional pumps or pressure
systems, reducing both capitaland
running-costs.”
The HRS R Series is available
in two lengths (1 and 2
meters) and with one-,
three-or six-tube options
providing a range of surface
areas between 0.35 and 4.2
m2. For larger installations
multiple units can be combined
in series and units can be
mounted horizontally or vertically
and internal baffles can be specified
within the tubes to overcome
situations where shell-side flow may
be limited. This also means that
it is possible to obtain complete
counter-current flow between
the shell-side and tube-side
fluids for multi-pass designs.
In other situations, such
as condensing (e.g. stem
heating) and evaporating
(e.g. ammonia cooling) the
baffles are not used, in order
to improve performance. The R
Series is suitable for a range of
uses in meat processing, including
heating, cooling, pasteurisation,
crystallisation and evaporation.
“For some materials, such as
fats, purees and minced meats,
increased turbulence is beneficial,”
adds Chris. “With its small footprint,
ease of maintenance and the
ability to recover product, in these
situations the unique design of
the HRS R Series offers a number
of advantages over other heat
exchangers on the market.”
HRS provide a range of heat exchangers, modules and
complete processing systems that help you to optimise
production, make the most of raw materials, whilst reducing
energy consumption, waste and emissions.
info@au.hrs-he.com www.hrs-heatexchangers.com/nz
NZ: +64 9 889 6045 AU: +61 3 9489 1866
HRS strip banner ad Food Technology Oct 2019.indd 1 19/09/2019 13:57:45
www.foodtechnology.co.nz 15
/nz
/www.foodtechnology.co.nz
link
/nz
/www.foodtechnology.co.nz
link
