|
The
outlet dewpoint from any heat-of-compression dryer is based in large part
on the discharge temperature of the compressor. If the compressor, for
whatever reason, does not deliver high enough temperatures, then the dryer
can’t deliver low dewpoints. This has always been one of the problems
with conventional heat-of-compression dryers; until now. The HC design can
be equipped with a small optional booster heater which will automatically
energize if the regeneration temperatures are not adequate. Because the
heater is located in the stripping line, it is not heating the full flow
of the compressor; rather, it is comparable to a typical heated dryer. The
maximum heating time is the same as stripping; 90 minutes. Heating is
terminated by a temperature switch to minimize energy consumption. The
heater allows the dryer to deliver low dewpoints under virtually any set
of conditions. The heater is identical to our heated dryer design; we use
an incoloy sheathed heater derated to 14 watts/sq. inch. We provide a
triple redundant thermostat control system to insure heater life and
exceptional reliability. |
