Rönnskärverken is part of Boliden Mineral AB and is located on the coast outside of Skellefteå. Rönnskär receives raw materials from mines and electronic scrap to produce mainly copper, but also gold, silver, zinc and lead. In addition byproducts of sulfur dioxide and sulfuric acid are produced from the metal production. Besides this waste heat from processes is collected and produces steam and district heating. The steam is used to keeping boilers warm and in certain processes and production of district heating for local heating at Rönnskärsverken and consumers in Skelleftehamn and Ursviken. In the current situation waste heat from some processes is used and in addition to these, there are additional sources of heat that can be taken advantage of. Among these are the waste heat in a chimney connected to the sulfuric acid production and a cooler linked to the sea.This report deals with an investigation of the effect on Rönnskär’s steam- and district heating grid that a temperature increase on the produced district heating provides. The effects of two proposals on the utilization of the waste heat from a chimney tied to the sulfuric acid production and a proposal with the use of water vapor from the steam grid were investigated and compared economically.The investigation showed that one of the proposals, which uses waste heat from the chimney and a reduction in thermal cooling of heat with sea water, is of the examined proposals more advantageous from a financial perspective. This proposal corresponds to a saving of approximately 681 m3 oil of the type fuel oil 5 per year and is calculated to repay its investment cost within 6 months. / <p>Validerat; 20151113 (global_studentproject_submitter)</p>
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:ltu-58304 |
| Date | January 2015 |
| Creators | Eriksson, Daniel |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| 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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