Heat optimisation of recycled oil production from waste oils and oily waste waters

Ron Zevenhoven*, Hannu Helle, Frank Pettersson, Jarmo Söderman, Henrik Saxén

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

Abstract

Waste oils, bilge water and oily waste waters are more and more being processed into recycled oil products. Producing marketable recycled oil with a sufficiently low content of water, sulphur, heavy metals and other trace elements requires energy-intensive processing of oil/water mixtures containing up to 90% water. This paper addresses the energy economy of a processing plant that suffers from significant heat losses as a result of electricity use for heating and the time-delays between receiving the raw material and its actual processing. An assessment is made of the scale of the energy dissipation and how these can be reduced, for example, by replacing input of electricity by a heat source; by reducing on the heat losses to the environment during product and raw material storage; by making better use of the heat of the incoming raw material when it is delivered; and by using heat storage volumes for "hot" streams of raw material, product oil and water separated from the oil/water mixtures. Exergy analysis is used to calculate the energy losses to the environment and the efficiency of the heat exchange steps. Minimising the use of electricity and fuel oil for heating purposes is the main target in this work. Also included in the analysis are seasonal effects. An example shows how batch-wise receiving of raw material could be integrated with a continuous process where hot water is one of the by-products.

Original languageEnglish
Title of host publicationECOS 2007 - Proceedings of the 20th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
EditorsOzer Arnas, Alberto Mirandola, Andrea Lazzaretto
PublisherUniversita degli Studi di Padova
Pages839-846
Number of pages8
ISBN (Electronic)9788889884089
Publication statusPublished - 2007
MoE publication typeA4 Article in a conference publication
Event20th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2007 - Padova, Italy
Duration: 25 Jun 200728 Jun 2007

Publication series

NameECOS 2007 - Proceedings of the 20th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
Volume1

Conference

Conference20th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2007
CountryItaly
CityPadova
Period25/06/0728/06/07

Keywords

  • Heat optimisation
  • Recycled oil
  • Waste oil processing

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