Types of Construction.
—The accompanying diagrams show two types of construction. [One] wherein the brine pan is made of cast concrete and the rails suspended from wood rail beams hung on rods attached to the ceiling. [The other one] shows the brine pan made of wood built up from supported rail beams. In the first instance the brine spray is collected on what might be termed a composition roof (without the gravel covering) made from asphalt saturated paper, and asphalt laid over a cork sub-base spread upon and cemented to the concrete pan. In the second instance the pan is made from wood, exhibiting a wood paneled surface on the underside, covered with cork, more wood and then lined with a galvanized iron pan.
Arrangement of Piping.
—In both instances the brine spray header was located near the top of the hot air flue partition and the sprays directed to a line below the horizontal, to insure the brine falling well within the pan, to prevent splash through the cold air flue.
The brine is collected and returned through a main pipe to the brine tank in which are placed the submerged coils.
Salt Brine—Calcium Brine.
—One system is operated on salt brine in which the accumulation is sterilized by boiling, then filtered and used for curing purposes. The other is operated on calcium brine which is concentrated by passing over a concentrator. It is then returned to the brine tank.
Spray Devices.
—There are various spray devices purchasable on the market, some approaching atomizers. The owner usually selects something to his taste. A common spigot can be used with a piece of bent tin to distribute the brine at the outlet, but more efficient devices are obtainable.
The location of the nozzles at a distance of about four feet apart seems to be ample for most purposes. The outlet opening should be about one-half inch, valve controlled to suit. It is well to arrange long length of pipe so that each cock is supplied with an equal quantity of brine by use of forked connections on a complete supply circuit.