pf_03315 - Laserfiche WebLink

Home

:) . .] I, . J Emission Test Report EMC W A-2-08 Section 2 Revision: 0 Date: September 30. 1999 Page lof2 I I Section 2. Source Description 2.1 Process Description ~,.... ., , I . ,I U 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 and vented to the common chimney located on a side of the steeple. A schematic of the unit tested is presented in Figure 2-1. A retort is preheated prior to introducing the body container for cremation. Typical cremation takes approximately 2 hours. Following a cremation, the coo1down, removal of the remains, and preheating for the next cremation takes approximately 1 hour. il J ~j ~'j The cremation incinerator unit retort 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 external dimensions of the retort are approximately 15 feet long by 5 feet wide by 6 feet high. The burner in the primary chamber is rated at approximately 0.6 MMBTUIhr, and the burner in the secondary chamber is rated at approximately 1.0 MMBTUlhr. A forced air blower (approximately 400-600 scfID) supplies air to both burners and chambers. I. .,] ,,' Combustion gases and products are vented through refractory-lined ductwork above the retort to a wet scrubber with spray chambers using unmodified water (i.e., not caustic or acidic). Gases 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 device, may be a candidate for maximum achievable control technology. ',.,..,"". .~' < r LJ 2.2 Control Equipment Combustion gas passes through a wet scrubber prior to entering the chimney. Entrained particulate matter and other pollutants exiting the secondary combustion chamber are removed in the scrubber. The horizontal, cylindrical, stainless steel scrubber unit is approximately 48 inches long with a 36-inch diameter and uses unmodified city J MRI-AED\R49S1-08-0) S2.wpd