Some materials are unsuitable for incineration because
they would cause damage to the incinerator. Where refuse is disposed of by
incineration, installation regulations will specify the various segregations of
refuse. The following materials are not suitable for incineration and will be
rejected by the operator with the proper authority notified.
Hazardous refuse. Reject all hazardous refuse of the types described
in Section 4.5. Fine dust, flour, and powdered sawdust are also
potentially hazardous when charged into the incinerator in large
compact quantities. If care is exercised, they can be charged safely
in small quantities.
Noncombustibles. Metal, glass, ashes, and the like do not burn readily
at normal incinerator temperatures. They form a slag, foul the grates,
increase stoking requirements, reduce burning capacity, and finally
must be removed from the furnace. Small quantities of tin cans and
wire bindings will not materially affect incineration; operations
shall not be delayed to sort them out.
Excessive moisture. Refuse containing a high percentage of liquid
shall be rejected. Excessive liquid will slow combustion and damage
hot refractories and castings.
Lumber. Burning lumber releases more than four times as much heat as
ordinary combustible rubbish. Heavy construction lumber and crating
shall not be charged in large quantities into a Type I(1) or Type II
incinerator. An operator can mix this material in small quantities
with Type I and Type II wastes. Type III or an industrial destructor
can also be designed to incinerate this material.
Incinerator facilities must provide for receiving,
weighing, unloading, storage, charging, combustion, emission control, and
removal and handling of residues. Principal components in the design of an
incinerator are shown in Table 4-3-17E.
Safe incinerator operation and maintenance shall be a
primary concern. Personnel shall have a short safety meeting just before the
commencement of maintenance work.
Dampers in the ducting shall be closed during servicing of
induced/forced-fans to prevent downdraft/updraft from turning the fans
and causing injury.
Materials handling equipment (MHE) shall be inspected daily by
operator and load tested at least annually.
Storage tanks, silos, manholes, and process equipment shall be checked
by a gas-free engineer before personnel enter. Personnel inside a
confined space shall have a lifeline and a buddy with visual contact
at all times.
See Table 4-3-17G.