Feasibility analysis of different energy optimisation techniques for a steel plant to improve its energy efficiency in a steam distribution system

Imran Shabbir*, Jordan Bowyer, Mojtaba Mirzaeian, Qaisar Abbas

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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Abstract

An efficient steam distribution system is essential if steam of the right quality and pressure is to be supplied, in the right quantity, to the steam using equipment in any industry. This paper describes a feasibility study of the implementation of different energy optimisation opportunities in a steam distribution system of a steel plant to evaluate their energy saving potentials and economic benefits. The main producers of superheated steam (11 barg and 300-320 oC) in the investigated steam distribution system are service boilers (medium pressure water tube boilers), superheater at Basic Oxygen Steel (BOS) plant, backpressure steam turbine, pressure reducing stations and high lift pumps at blast furnaces where steam is transported to the whole plant through a large, complex system of pipes, several take-off lines that operate at different temperature and pressures and is approximately 20 km in length. Mass and energy balance of whole steam distribution network is carried out and feasibility of recommended energy-saving opportunities i.e. isolation of redundant steam lines, re-routing steam flows, improved insulation of steam lines and installation of non-return valves are carried out on the basis of Annualised Life Cycle Cost (ALCC) analysis and payback. The results of energetic analysis of different energysaving recommendations will results in 112TJ (tera joule) of annual energy savings which equals to 56kt (kiloton) of steam and will also results in the efficient operation by isolating cold steam lines, reduce pressure and temperature loss in the steam main through improved insulation and reduced maintenance cost within endusers by using better quality steam. Based on the economic analysis, it is also concluded that proposed energysaving recommendations will create annual savings worth of £0.5 million with a payback of less than 1.5 years.
Original languageEnglish
Title of host publicationInternational Conference on Sustainable Materials and Energy Technologies
Subtitle of host publicationICSMET 2019, 12th - 13th September 2019, Coventry UK
EditorsMansour Qubeissi, Martin Khzouz
PublisherInternational Society of Engineering Science and Technology
Pages40-40
Number of pages1
Publication statusPublished - 12 Sep 2019
EventInternational Conference on Sustainable Materials and Energy Technologies 2019 - Coventry , United Kingdom
Duration: 12 Sep 201913 Sep 2019
http://www.isest.org/icsmet2019/

Publication series

NameProceedings of International Conference on Sustainable Materials and Energy Technologies – ICSMET 2019

Conference

ConferenceInternational Conference on Sustainable Materials and Energy Technologies 2019
Abbreviated titleICSMET 2019
Country/TerritoryUnited Kingdom
CityCoventry
Period12/09/1913/09/19
Internet address

Keywords

  • energy efficiency
  • steam distribution system
  • life cycle cost analysis
  • steel plant and boilers

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