Importance

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Abstract

The invention relates to a method for vacuum conveying bulk material in a vacuum conveying system (1) which comprises: a plurality of tubes (2-6) for conveying bulk material, at least some of said tubes having flexible walls (71), a vacuum blower (10) disposed at a first end of said vacuum conveying system (1) for generating a conveying gas flow within said vacuum conveying system (1), a bulk material discharging section (22, 23) for discharging bulk material into said vacuum conveying system (1), and a bulk material receiving section (8, 9) communicating with said vacuum blower (10), for receiving bulk material conveyed by said gas flow from said bulk material discharging section (22, 23). According to the invention, the method comprises the steps of: disconnecting said vacuum blower (10) from said vacuum conveying system (1); and applying pressurized gas to said vacuum conveying system (1) or at least to a subsection thereof for stretching or inflating said flexible walls (71) to thereby reduce adherence of bulk material to said flexible walls (71). Other aspects of the invention relate to a corresponding vacuum conveying system, to a controlling device and a computer program product for controlling the vacuum conveying system in accordance with the above method steps.

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First Claim