Abstract This report is the result of an examination work at the University of Karlstad. The purpose of this project is to examine how the condition of the steam affects the efficiency of the steam consumers and how variations in that condition affect a pulp and paper mill. This report is meant to describe the main components regarding steam production, steam conditioning and steam consumption. It should also be able to give basic information about the significance of steam conditioning in the pulp and paper industry. It is aimed to people working with steam conditioning to increase their understanding and knowledge about it. The aim of this report is to: • Describe the function of the most commonly used steam generators and the difference between these. • Identify the main steam consumers and describe their function. • Give an introduction to steam conditioning and its role at a pulp and paper mill. This report will try to answer the following questions: • How does the generated power from back-pressure steam turbines vary with grade of superheat of outlet steam? • What are the advantages with steam conditioning? • Are the steam conditioners at Gruvöns bruk able to deliver steam at the right condition? The conclusions from this report are that; • If the steam conditioning valves are able to reduce small steam flows to the correct temperature, more power can be produced. The design condition of the steam turbines can than be nearer saturation. • The temperature variations are more critical at the turbine inlet than downstream the steam conditioning valves. The valves at Gruvöns bruk who are studied in this report, are fully functioning. • Common for the main steam consumers at pulp- and paper mills are that they are all sensitive for variations of steam temperature, especially high temperature.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:kau-582 |
| Date | January 2007 |
| Creators | Nyberg, Thomas |
| Publisher | Karlstads universitet, Institutionen för ingenjörsvetenskap, fysik och matematik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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