Medical Waste Incinerators With a Waste Heat Boiler

Application

A medical waste incinerator at a Seattle medical center that burns 100 percent of its infectious waste stream.

Optimization Potential

Mikropul top-load, pulse-jet
168 grooved snap-band filter bags
3500 acfm, 425°F
Air-to-cloth ratio: 1.8 ft³/min/ft²
Dry injection - sodium bicarbonate
Grain loading: 1 - 4 gr/acf

Incinerator: Thermtec model FP800AR. Designed to combust 500 pounds/hour of infectious waste. Operates 17 hours/day, six days/week

Solution

GORE® membrane/Teflon® B fiberglass fabric (16.8 oz/yd²) replaced 22 oz/yd² conventional Teflon B fiberglass filter bags

Results

Since the GORE® membrane filter bags were installed in April 1991, the pressure differential across the baghouse remains less than three inches w.g. before cleaning. After one complete cleaning cycle, the pressure differential is reduced to 0.5 inch of w.g. The cleaning-air pressure is set at 40 psig, and the cleaning cycle is actuated once every two days.
Compliance testing revealed an outlet emission level of 0.0008 gr/acf for front-half catch particulate matter.

TEFLON is a registered trademark of E. I. duPont de Nemours & Co., Inc.