Abstract: An arrangement for and a method of horizontally supporting a side wall of a top-supported flue gas pass. The side wall includes evaporative water tubes at a first temperature, and the flue gas pass includes a superheating tube at a temperature higher than the first temperature and having rigid, horizontal tube legs extending across the flue gas pass between the side wall and a second side wall of the flue gas pass and being supported from above by a hanger, which is in operation at a temperature higher than the first temperature. Rigidity of the side wall is increased by horizontally supporting the side wall by the horizontal tube legs including end sections attached to the side walls by attaching means allowing relative movements of the end sections with respect to the side wall to which the end section is attached, only in a direction of their relative thermal movement.

Abstract: A bottom-supported boiler that includes a boiler pressure body having a rectangular horizontal cross section formed by joining four planar water tube walls pairwise together so as to form four corners with water tube walls being formed with fins welded between the water tubes, and a support construction including four vertical columns vertically supported to the ground. The vertical columns are arranged outside of the boiler pressure body so that adjacent to each of the corner corners is arranged one of the four vertical columns. Each of the vertical columns is directly connected with a rigid joint to a respective corner so that vertical loads of the boiler pressure body are balanced by the four vertical columns, and so that the water tube walls are supported from their sides by the four vertical columns so that the weight of the boiler pressure body is transferred through the vertical columns, and such that each of the four vertical columns is directly attached to a respective corner.

Abstract: A boiler construction includes a boiler pressure body having a bottom and a roof at a height H from the bottom and at least four planar watertube walls forming a polygonal horizontal cross section with at least four corner sections, and a rigid support steel structure, the boiler pressure body being supported to the rigid support steel structure at a height between the bottom and roof. A vertical corner column is attached exteriorly to at least four of the at least four corner sections at a height region between the bottom and roof, and the supporting of the boiler pressure body is provided by supporting each of the vertical corner columns to the rigid support steel structure at a height from 0.1 H to 0.9 H from the bottom so as to balance vertical loads of the boiler pressure body.

Abstract: A boiler construction includes a boiler pressure body having a bottom and a roof at a height H from the bottom and at least four planar watertube walls forming a polygonal horizontal cross section with at least four corner sections, and a rigid support steel structure, the boiler pressure body being supported to the rigid support steel structure at a height between the bottom and roof. A vertical corner column is attached exteriorly to at least four of the at least four corner sections at a height region between the bottom and roof, and the supporting of the boiler pressure body is provided by supporting each of the vertical corner columns to the rigid support steel structure at a height from 0.1 H to 0.9 H from the bottom so as to balance vertical loads of the boiler pressure body.

Abstract: A bottom-supported boiler includes a boiler pressure body having a rectangular horizontal cross section formed by joining four planar water tube walls pairwise together so as to form four corner sections, and a support construction. The support construction includes four vertical columns vertically supported to the ground, the vertical columns being arranged outside of the boiler pressure body so that adjacent to each of the corner sections is arranged one of the four vertical columns. Each of the vertical columns is attached to the respective corner section so that vertical loads of the boiler pressure body are balanced by the four vertical columns.