BOF gas cleaning: 2nd generation of drytype ESP and Hydro Hybrid Filter technology

摘要

In BOF plants utilizing converter gas recovery, gas cleaning is nowadays possible by wet scrubbers and the round-type ESP. As environmental regulations will become more restrictive and wet scrubbers may no longer fulfill these requirements, the round dry and wet-type ESP are the only alternative. The dry-type round ESP has the following main advantages compared with the wet scrubber system: Lower clean-gas dust content Lower operation costs Less maintenance work No water treatment system required Less water consumption However, the current generation of ESP for BOF primary off-gas cleaning processes does not comply with the latest available state-of-the-art ESP technology. In view of this situation, the two companies SMS Siemag and ELEX have founded a joint venture, the new company SMS ELEX AG, with the intention of developing a new generation of gas cleaning equipment for converter off-gas from BOF meltshops.