Publication detail

Energy recovery systems in thermal processing of wastes

PAVLAS, M. BÉBAR, L. DUDEKOVÁ, M. STEHLÍK, P.

Original Title

Energy recovery systems in thermal processing of wastes

Type

conference paper

Language

English

Original Abstract

Energy recovery in thermal processing of waste plays an important role since it contributes to maximum utilization of energy contained in leaving flue gas. In case of utilizing energy released during thermal oxidizing (incineration of municipal solid waste (MSW) or hazardous waste) for generation of process steam, for co-generation (combined heat and power systems - CHP) we can consider the thermal processing as a specific kind of recycling. Since waste has sufficient heating value it belongs to renewable energy sources which enable to save fossil fuel as a primary energy source. Then we speak about waste to energy systems (WTE). Typical examples of units for the thermal processing of both MSW and hazardous waste are shown in the paper with the aim to evaluate main factors which indicate energy balance of the processes taking into account various regimes of operation. Basic rules of selection of the systems for energy utilization including CHP ones are specified, analyzed and illustrated through specific industrial units. Conventional methods of energy availability are discussed in the paper and analyzed. Then heat flows in the incineration plant and various factors taking into account plant efficiency and/or energy utilization rate are evaluated. Moreover, it is necessary to take into account specific features of flue gas (and/or off-gas) as a process fluid. For an optimum design of heat exchangers as equipment and integrated items a sequence "process - heat recovery system - heat exchanger" has to be taken into consideration and specific features of processes respected. A combination of intuitive design, know how and sophisticated approach based on up-to-date computational tools is shown in the paper. After selecting a convenient process for the given type of waste treatment available energy for heat recovery is evaluated and a heat recovery system designed. Novel design of air pre-heaters and special heat exchangers (e.g. those for sludge pre-heating) is shown. This approach always respects primary importance of process itself, as well as analysis aimed at heat exchangers selection and design including specific features and fouling problems.

Keywords

Waste incineration, Heat recovery, Waste-To-Energy

Authors

PAVLAS, M.; BÉBAR, L.; DUDEKOVÁ, M.; STEHLÍK, P.

RIV year

2007

Released

15. 4. 2007

Publisher

GRETh

Location

Le Bourget du Lac, France

ISBN

2-9502555-2-3

Book

Heat Transfer in Components and Systems for Sustainable Energy Technologies, volume 1

Pages from

101

Pages to

110

Pages count

10

BibTex

@inproceedings{BUT22437,
  author="Martin {Pavlas} and Ladislav {Bébar} and Miroslava {Dudeková} and Petr {Stehlík}",
  title="Energy recovery systems in thermal processing of wastes",
  booktitle="Heat Transfer in Components and Systems for Sustainable Energy Technologies, volume 1",
  year="2007",
  pages="101--110",
  publisher="GRETh",
  address="Le Bourget du Lac, France",
  isbn="2-9502555-2-3"
}