Chapter 8 — Inspection and Maintenance
8-26 Part No. 750-184
Liner Installation
Since the thickness of the furnace metal varies with the boiler design
pressure, a shim of appropriate thickness must be used to compensate for
the variance. A layer or two of insulating board or equal, or a bed of
refractory material, may be used to center the ring.
The liner tile can be fitted tightly against the furnace, since the finished
diameter is not critical.
It is recommended that the tile be dry-fitted, match-marked, removed, and
then reinstalled with the proper amount of refractory cement. Thin joints
(less than 1/16”) are desirable. Generally, it will be necessary to shave a
portion from one or more tiles to obtain a fit. If a fill piece is required, cut it
to fit and install the piece at the bottom of the furnace.
Allow refractory to air dry as long as possible. If immediate use is required,
fire intermittently at a low rate for several hours to thoroughly dry the
refractory.
Inspect the baffle gasket and replace if necessary.
Installing Precast Dry Oven
1. Glue fiberglass rope to the backside of the dry oven (item #2) around the
outside dia. of precast dry oven (item #1) as shown below.
2. Apply trowleze to end of furnace tiles.
3. Fit up the dry oven and tighten in place.
4. Remove excess cement.
Figure 8-5 Dry oven installation
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