Publication detail

Efficient Retrofit of Unit for Thermal Treatment of Sludge

ORAL, J. HAJNÝ, Z. PUCHÝŘ, R. STEHLÍK, P. TRUNDA, P.

Original Title

Efficient Retrofit of Unit for Thermal Treatment of Sludge

Type

conference paper

Language

English

Original Abstract

Pulp and paper production is very demanding on energy and raw material. Sludge which is generated during the pulp production has to be treated. Thermal treatment of the sludge proved itself to be the most appropriate solution of the problem. A unit for this treatment in one large pulp and paper plant sludge incinerator had been built many years ago and was quite modern at that time. However, because of more sweeping environmental laws affecting the process industry, the unit needed a complete retrofit. A brief description of this unit (with a multiple hearth incinerator with a fluidisedbed combustion chamber) is supplemented by simplified flowsheet and basic characteristic data. First stage of retrofit considered mainly in installing a secondary combustion chamber and a contact cooler. The second stage of retrofit can be characterised as a "waste-to-energy" one. An existing recuperative heat exchanger and the contact cooler were replaced by a new more efficient system of heat exchangers including utilising flue gas energy for heating demiwater. The successful retrofit can be characterised by a substantial decreasing pollutants (CO, CxHy, NOx and particles) concentration, introducing "waste-to-energy" system and up-to-date process control system, and reliability in operation. Practical experience utilizing know-how and intuitive design combined with a sophisticated approach (e.g. using the authors own software system for simulating processes for the thermal treatment of wastes) proved to be efficient supporting tool for an optimum design and operation.

Key words in English

thermal treatment, sludge, retrofit

Authors

ORAL, J.; HAJNÝ, Z.; PUCHÝŘ, R.; STEHLÍK, P.; TRUNDA, P.

Released

1. 1. 2001

Publisher

IChemE - Institution of chemical engineers

Location

IChemE, davis Building, 165-189 Railway Terrace, Rugby CV21 3HQ, UK

Pages from

64

Pages to

74

Pages count

10

BibTex

@inproceedings{BUT4842,
  author="Jaroslav {Oral} and Zdeněk {Hajný} and Radim {Puchýř} and Petr {Stehlík} and Pavel {Trunda}",
  title="Efficient Retrofit of Unit for Thermal Treatment of Sludge",
  booktitle="Incineration 2001 - 3rd international symposium on incineration and flue gas treatment technologies",
  year="2001",
  number="1",
  pages="64--74",
  publisher="IChemE - Institution of chemical engineers",
  address="IChemE, davis Building, 165-189 Railway Terrace, Rugby CV21 3HQ, UK"
}