Introducing Hi-Temp Refractory, your Crematory Repair specialists.With over 30 years of experience in the field of refractory, let Dan Bleich put his knowledge to work for you the next time your in need of a Crematory Repair. Call 1-(813)-633-8580 to recieve a free quote of your Crematory Repair ,Citrus Dryer Repair, or Heat Treating Oven Repair needs.
CITRUS DRYER INFORMATION
Written By Jimmie J. Bleich
• Maintaining Refractory Materials in Citrus Dryers
•Fans Not Working Properly
Check for any holes in the suction box, so as not to allow excess
air in—not heeded, this will cause a compression of air, especially if
the evaporator fan cannot pull this excessive air out of the chamber.
•No Quick Startups
Quick startups cause excessive expansion and spaulding of the
material. This moves the hot surface material too fast, leaving
behind the cold bottom material. This spaulding is caused in the
fire chamber, and in the air duct where the insulating Firebrick
6” thick lining is. The Firebrick will split in half, 2” to 3”, sometimes
not showing immediately, but it will be there, ready to fall.
•Keeping Dust Collector Clean
Debris in the Citrus Dryer will cut the insulating Firebrick to
to pieces. To prevent this, any time the furnace is shut down,
clean out air and fire chambers. This is a must, because a
clean furnace will save time, money, and equipment.
•No Airlocks or Compressions
The Fan at the front, inside the fire chamber, has 5” holes
directed at a 30 degree angle. This fan serves to create a
tornado like spiral, pulling off heat from the chamber firebrick
and pushing it into the main stream. If there is an airlock or
compression, nothing will move the heat out of the fire chamber,
which results in too much build up of heat on the Refractory.
•All Systems Go
All systems must work properly for the best results in
Refractory materials. When peel is plentiful, everyone is
tempted to push their citrus dryers to the max, with the heat
wide open. The results in the furnace, will be a literal melting
of the Refractory materials lining the citrus dryer.
The type of fuel utilized for your dryer also plays a significant
role in the maintanance of the Refractory materials. Just as crude
oil has toxic chemicals; such as sulpher, ect.; citrus peel also
has toxic compounds wit its acid. All such things can effect the
type of Refractory materials utilized in the fire box and air duct.
As these things change, you have to consider which material
best suits the circumstance. We are consultants in the field of
Refractory. Contact us for a consultation concerning what will
best work for your set of conditions. You can contact me, Jimmie
J. Bleich, by dialing 1-(813)-633-8580 or fax 1-(813)-642-9408.
I can be found on the world wide web at www.hi-temprefractory.com
and www.crematoryrepair.com. I look forward to hearing from you.
• 1) For best results, drying of newly
installed materials should be started
as soon as possible after the instal-
lation is completed.
• 2) Remove all free moisture at a
temperature of not over 250 degrees
F, not letting this vary too much for
2— 4 hours.
• 3) Then raise the temperature 100
degrees F per hour until the desired
operating temperature is reached.
Hold at this temperature until heat
balance through the material is
established to obtain the ultimate
• 4) This should be approximately 3 —
4 hours at this point, if the furnace
is to be cooled down. Refractory
manufacturers recommend to hold
operating temperature from 4 — 5
days or begin normal operations of
drying feed for this time. NOTE:
even though Refractory has been
• 5) If a furnace has been cooled down,
never fast start it so as to heat
surface of material faster than
the under portions of Refractory.
This causes spaulding and a split-
ting of material.
• 6) It is recommended that a slow
start and an increase in heat be
in proportion; in order to have
operating temperature in about
6 — 8 hours. This would not apply
to a furnace only down for a short
time, and has not cooled.
• 7) NOTE: The Refractory material
used in your citrus dryer should
be the same type used in the
original installation designed by
engineers to get the most out of
your citrus dryer. The insulating
Firebrick is to hold in the heat as
it is carried to the drying drum.
When considering repairs, if this
material is altered or changed to
a heat conducting material, loss
of heat will result, thus inefficiency
and more fuel consumption will
be the result.
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