B - Operations – Transporting – 08 – B
Patent
B - Operations, Transporting
08
B
149/7
B08B 9/02 (2006.01) C10B 43/00 (2006.01) C10L 10/06 (2006.01) F23J 3/00 (2006.01)
Patent
CA 1211345
APPLICANTS: JOE INGE OLGART JOHANNESSON, BENGT GORAN LUNDSTROM SVEN-GUNNAR SVENSSON, CLIMATIC AB, DALF INTERNATIONAL AB TITLE: Process and device for loosening and removing solid coatings on the surfaces of enclosed spaces, e.g. the flue gas side of a furnace or boiler ABSTRACT OF THE DISCLOSURE Process and device for loosening and removing soot and solid coatings on surfaces in enclosed spaces such as the flue gas side of a furnace or boiler. In the case of a furnace, covers and flue gas ducts to the flue gas side are sealed to form a closed chamber, which is supplied with unpressurized steam. Characterizing the process is that the steam, before being introduced into the enclosed space, is saturated with a cleaning composition, which includes synthetic tensides, alkali, complexing agents, a corrosion inhibitor and environ- mentally safe solvents and solvent vehicles. The cleaning of the metal surface is done in one or more steps and is followed by a passivating step for the metal surface, whereby the surface is coated with a passivating agent which counteracts continued deposits on the metal surface. The device is characterized in that it comprises a vessel for liquid cleaning composition, said vessel being connected via a line to a reduction valve, through which water flows to a steam generating chamber, which includes means for vapourizing the water in conjunction with said composition. The combined steam of water and composition is conducted via a steam line to the enclosed space to be cleaned, e.g. the flue gas side of a furnace.
402177
Agertegh Sven-Erik
Agertegh Sven-Roland
Johannesson Joe I.o.
Lundstrom Bengt G.
Mikulasek Vlastimir
Climatic Ab
Dalf International Ab
Gowling Lafleur Henderson Llp
Johannesson Joe I.o.
Lundstrom Bengt G.
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