2. Management of plastic waste before and after the system
upgrade
The hospital uses the heat for technological purposes, heating,
ventilation and hot water. According to calculations, the total
heat demand is 1.0 MW. The main and largest consumers of heat
are technological devices associated with hospital operations.
They require saturated steam power. The other heat consumers
or heat exchangers are supplied with hot water at a temperature
of 90 C. The production of saturated steam and hot water takes
place in a hospital boiler room, which is fired with natural gas
with a high methane content and thermal capacity of
Q 1⁄4 1200 kW. Medical waste generated in the hospital as a result
of treatment was originally exported to regional waste disposal
facilities.
Fig. 1 shows the thermal management structure after the system
upgrade. The upgrade included the design and construction of a
special medical waste incineration system based on a rotary kiln
with co-current combustion. According to documents developed by
the European Union (European IPPC Bureau, 2006), medical waste
incineration in a rotary kiln is currently the best available technique
(BAT).
The experimental system studied uses a unique construction of
the combustion chamber (rotary kiln). Due to the relatively high
calorific value of waste (approximately 25 MJ/kg) and the need for
secondary combustion (afterburn) of bottom ash, an appropriate