Waste material soluble in water?_ Water content well mixed, emulsified?_
If there are solids in the liquid, what is their size range?_
Conradson carbon_Corrosion (copper strip)_
Is the material corrosive to carbon steel?_Corrosive to brass?_
What alloy is recommended for carrying the fluid?_
Distillation data (if applicable) 10% at_°F; 90% at_°F; end point_°F.
Viscosity_SSF at 122°F or_SSU at 100°F.
pH_; acid number_; base number_
Heating value_Btu/gal Specific gravity (H2O = 1.0)_
Will the material burn readily?_
from charging rooms (see Figure 10.11.3). Direct incinerators are the least expensive but are limited in their hourly capacities to 500 lb, while indirect incinerators operate at capacities up to 1000 lb/hr. A manually charged incinerator (see Figure 10.11.3) is fed through a bell-covered chute from the floor above the furnace. This labor-saving design also guarantees good combustion efficiency and protection against flashbacks. The separate charging room is also convenient for sorting waste for recycling. Incinerators can also be fed from the same floor where the furnace is located. This arrangement also permits sorting and is labor-efficient although the radiant heat can be uncomfortable for the operator.
In high-rise buildings, the installation of a waste chute eliminates the labor involved in charging the incinerator (see Figure 10.11.4). The chute automatically directs the solid waste into a top-charged, mechanical incinerator. The charging rate can be regulated by rotary star feeders or by charging gates that open at 15- to 30-min intervals. Both offer protection against momentary overloading.
Hydraulic plungers or rams offer a more controlled method of automatic charging. The movement of the reciprocating plunger forces the refuse from the bottom of the charge hopper into the furnace (see Figure 10.11.2). This method is the most common for automatic charging for capacities exceeding 500 lb per hour.
Incinerators that burn sawdust or shredded waste are frequently charged by screw feeders or pneumatic conveyors. Screw feeders are at least 6in (15 cm) in diameter and are designed with variable pitch to minimize the compression (and therefore blocking) of the shredded waste. Container charging, which is being used in a few isolated cases, has the advantage of protecting against exposure to flashback caused by aerosol cans or the sudden combustion of highly flammable substances.
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