| 摘要 |
The present invention relates to a device for use in a cleaning installation for removing soot or similar inside deposits in a flow channel in a processing system such as a boiler, heat exchanger, flue gas filter or the like, by intermittently blasting a fluid or gaseous medium into the processing system, said device comprising a flow passage between the associated valve means and the flow channel, wherein the flow passage is provided with an inlet allowing for a continuous flow of protective gas around the flow passage into the flow channel in the processing system. By the present invention, corrosion is reduced since a cushion of air is generated at the end of the flow passage during off-cycles of the cleaning operation as air is constantly drawn or forced in through the inlet. This means that the components are covered by this cushion and protected against corrosive gasses in the heat exchanger or the like. Hereby, the valve means are protected from corrosion and tests have shown that durability of the exposed components facing the inside of the boiler or the like has been significantly improved.
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