Plate link chain having inner and outer plate members comprised of individual plates

A method of reducing a draft effect of a flue duct upon an upstream exhaust gas cleaning system, including the steps of

• extending a downwardly open flue duct into a vat so as, with the aid of a liquid that has collected in the vat, to form a liquid barrier that is adapted to close off a flue gas end of said flue duct relative to the environment;
• relieving the upstream exhaust gas cleaning system from the draft effect of the flue duct by lowering the level of the liquid in the vat below an edge of the flue duct to expose at least a portion of a cross-section of the flue duct.

An arrangement for reducing the draft effect of a flue duct upon an upstream exhaust gas cleaning system, comprising:

• a vat in which liquid is to be collected, wherein a downwardly open flue duct is adapted to the immersed in liquid collected in said vat to form a liquid barrier that is adapted to close off a flue gas end of said flue duct relative to the environment;
• and
• means for lowering the level of the liquid in said vat below an edge of said flue duct to thereby expose at least a portion of a cross-section of said flue duct in order to relieve the upstream exhaust gas cleaning system from the draft effect of the flue duct.