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PUG-01-2001 1?t 17 I NDUSTi R I AL EQUIPMENT � �'� 4F( 886 59% P.05/12 Source Description Process Description The crematory at Woodlawn Cemetery is located in a lower level adjacent to the basement of the Woolworth Chapel. Four cremation incinerator units of the same design are operated end vented to the common chimney located on a side of the steeple. A schematic of the unit tested is presented in Figure 2- 1. The unit is preheated prior to introducing the body and container for cremation. A typical cremation takes approximately 2 hours. Following a cremation, the cooldown, removal of the remains, and preheating for the next cremation takes approximately I hour. The cremation incinerator unit consists of a primary combustion chamber where cremation occurs and a secondary chamber where the products of combustion from the primary chamber are incinerated further to reduce emissions. The horizontal refractory lined duct was used as an extension of the secondary chamber. allowing secondary combustion in this area. The extension provided for greater than one second retention time with approximately 6 1 cubic feet of total secondary chamber before discharge into the scrubber. The external dimensions of the unit are approximately 15 &e long by 5 feet wide by 6 feet high, not including the extra secondary chamber ductwork. The burner in the primary chamber is rated at approximately 0.6 NCWBTU/hr, and the burner in the secondary chamber is rated at approximately I _o hOOT /qtr, A forced air blower (approximately 4 sefin) supplies air to both burners and chambers. Air controls were used direct the air to both the primary chamber hearth and the secondary chamber downpass in order to control emissions and temperature. Combustion gases and products are vented through refraotory-fined ductwork above the unit to a wet swabber with spray chambers using unmodified water (i.e., not caustic or acidic). GMS from the scrubber pass through a short section of duct with a damper to the chimney. Uncontrolled emissions were measured in the horizontal, circular section of duct immediately upstream from the scrubber. Ports were installed for the tests. Controlled emissions were measured in the short horizontal, circular section of duct between the scrubber and chimney. A new section with ports and without the damper was installed for the tests. The damper is used to isolate the unit from the chimney and the other three units when it is not in use. This unit is considered to be typical for cremation incinerators, and the scrubber, or a similar duce, may be a candidate for maximum achievable control technology.