| SPECIAL FEATURES |
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High heat transfer coefficients |
| Because SCHMIDT plate heat exchangers develop extremely
high heat transfer coefficients (up to 7000 W/m2 K) they require
low surface areas and have low capital cost. The continuous in-house development programme coupled to basic research work done in cooperation with Universities was and is, the basis of the optimited profiles of our SIGMA heat exchanger plates. |
|
Optimised heat recovery |
| With high heat transfer coefficients and favourable
flow characteristics SIGMA plate heat exchangers designed for counter current
flow with product temperature differenes of less than 1”ĘC make heat recovery
in excess of 96% technically and economically viable. ”” |
|
Low liquids content |
| As the gap between two plates is small, a plate
heat exchanger contains only low quantites of processed product in comparison
to a tubular heat exchanger. The product remains in the plate heat exchanger
only for a short time and the process can be easily stopped or the temperatere
can be changed quickly with minimum damage to the product. The weight of a plate
heat exchanger is considerably less than that of a tubular heat exchanger for
the same duties. |
|
Compact construction |
| The concept of the plate heat exchanger and the
special compact construction of SCHAMIDT units allow the housing of large heat
exchanging surface areas in a very compact, space-saving frame. In comparison
with a tubular heat exchanger with the same performance considerably less space
is required and no additional space is necessary for opening the plate heat
exchanger. |
|
No missing of the product |
| The sealing system of the SIGMA heat exchanger
plates is designed for double sealing of the flow channels. This prevents the
two process fluids from mixing, If there are any leakages at the gasket aroud
the plate or the port areas, the leakage is to atmosphere and becomes detectable.
|
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| SIGMA-sealing system |
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Reinforcements |
| Under the gasket groove the heat exchanger plates
are reinforced on both sides. The profile on both sides grants an exact placement
of the gaskets and a stability of the plate package, especially for large plate
types. |
|
Flexibility |
| With SCHMIDT plate heat exchangers changes to the
processing conditions can be readily accommodated. For this purpose the plate
arrangement can be changed, plates can be added or removed. It is possible for the initial calculations of the unit to provide for future operating conditions. It is also possible to install several sections into one frame and permit flow continuity in processes involving several process steps (e.g. pasteurisation). Different products can be processed in different sections within the same unit. |
|
Low fouling |
| Fouling of the heat transfer surfaces of a SCHMIDT
plate heat exchanger is extraordinarily low. This is a result of good product
distribution, constant velocity profile and smooth plate surfaces. The high
induced turbulence gives a selfcleaning effect which prevents fouling. |
|
Easy maintenance |
| SCHMIDT plate heat exchangers can easily be mainteained
and cleaned. The unit can be cleaned without dismantling by cleaning in place
(CIP) systems, by reverse flow cleaning or by addition of suitable cleaning
soulutions. It is easy to inspect the plate surfaces, to regasket plates or to clean them mechanically. Removing the closing bolts makes the plate package easily accessible. |
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| A comparative presentation | |