§ 5-02 Requirements.
RCNY § 5-02
(a)General. These criteria apply to existing incinerators in multiple dwellings. Other designs will be considered if it can be demonstrated that the emission performance requirements of the New York City Air Pollution Control Code can be met, and if such designs comply with the applicable provisions of the Administrative Code.
(b)Minimum requirements and performance for upgrading.
(1)Incinerator capacity, where feasible, should be adequate to accommodate refuse load based on four burns per day. (See: Table 1 and figure 1.) Grates and brickwork in incinerator and flue must be in good repair.
(i)grate area shall be at least 50 percent of total burning area, where the existing conditions permit.
(ii)hearths under the charging flue shall be pitched at a 60° angle from the horizontal so that refuse will slide down on to grate.
(2)Auxiliary burner(s) with spark ignited gas pilot, flame failure shutoff (100%), temperature control, temperature indicator, furnace draft and closed damper interlocks shall be installed to provide for ignition of the refuse and maintenance of furnace temperature between 1,400F and 1,600F. (See: Table 1 for gas burner(s) capacity.) (3) Overfire air fan manifold and nozzles for 25 percent of combustion air requirement shall be installed to assure adequate turbulence and burnout of refuse. Manifold may be located outside furnace as space permits.
(4)Programming electric clock with 24 hour dial, having 15 minute adjustable contact pins, to permit automatic starting and stopping of burner(s) and fans.
(5)Enclosed steel cabinet with locked cover, dust and splash-proof, for housing all control equipment. Located in basement, on wall or steel stand, at least 2 feet from incinerator wall to avoid over-heating. Cabinet shall be prewired.
(6)By-pass damper shall remain closed when the scrubber is in use, but shall be opened automatically when the scrubber is shut down.
(7)Furnace draft, to assure optimum conditions for control of combustion air, shall be maintained at all times at approximately 0.10 in. of water by automatic control of the ID fan damper.
(8)Hopper door locks, if any, shall be synchronized with incinerator operations.
(9)Overtime burning. If the furnace is too small to hold the refuse accumulated overnight between 5p.m. and 7a.m, and the furnace cannot be enlarged, permission for overtime burning, between 6a.m. and 11p.m., may be granted. The hours for burning shall be shown on the Certificate of Operation.
(10)Every incinerator must meet the particulate emission performance requirements set forth in the New York City Air Pollution Control Code. This may be accomplished by the installation of a scrubber or other control device capable of reducing the uncontrolled particulate emission to a level not exceeding the allowable particulate emission rate. Materials of construction for air cleaners shall provide suitable corrosion and erosion resistance.
(c)Incinerator and flue design. The following are four examples of existing incinerators requiring upgrading: (1) Single flue, single combustion chamber (Figure 2) (2) Refuse chute and direct fed multiple chamber (Figure 3) (3) Single flue, multiple chamber (Figure 4) with bypass flue in basement or at first or second floor.
(d)Conversion of single flue incinerators to double flue or separate gas flue incinerators. With scrubber or equivalent air cleaner installed, a separate gas flue may be provided by one of the following designs.
(iii)Dampers are provided in boiler and incinerator flues to prevent excessive gas cooling during cleaning or shut-down periods.
(iv)Connecting flues from oil fired boilers and incinerators are relatively short and are provided with cleanout doors.
(e)Operating cycles.
(3)Single flue, multiple chamber with by-pass flue at first or second floor.
(f)Air for incineration. Adequate provisions for admission of air to incinerator room shall be provided. (Figure 8.) (g) Operating instructions. The following precautions should be taken: (1) During alteration.
(v)Set the timing mechanism for 4 or more burns per day: For example: 6 - 7 a.m., 2 - 3 p.m., 7 - 8 p.m., 10 - 11 p.m.
(vi)It may be necessary to make seasonal adjustments in the choice of operating periods.
(h)Maintenance instructions.
