Valmet Technologies Oy

Nokia Corporation

Nokia Technologies Oy

Juha Ojanperä

Tero Heino

Pekka Lehtonen

Kari Mäkelä

Heikki Airikkala

Kalle Hannula

Jere Fabritius

Harri Yli-Rantala

Juha Hiljanen

Tuomas Kanniainen

A coaxial heat transfer tube (), comprising a first inner heat transfer tube () having straight parts () and curved parts (), a first outer heat transfer tube () having straight parts () and curved parts (). The first outer heat transfer tube () radially surrounds the first inner heat transfer tube () at least within the first primary straight part () and the first primary curved part (). Thermally insulating material () has been provided in between a curved part () of the first outer heat transfer tube () and a curved part () of the first inner heat transfer tube (). Neither straight part () nor a curved part () of the first outer heat transfer tube () comprises a longitudinal seam. A method for making a coaxial heat transfer tube ().

Coaxial heat transfer tube suitable for a fluidized bed boiler and a method for manufacturing same

A heat exchanger having a first heat transfer tube with a first primary straight part and a first secondary straight part is provided. The heat exchanger includes a first primary bond part and a first secondary bond part. The first primary bond part is welded to the first secondary bond part to form a first primary bond that bonds the first primary straight part and the first secondary straight part of the first heat transfer tube. The first primary bond limits a first primary aperture and a first secondary aperture formed by the holes of the bond parts, wherein the straight parts of the first heat transfer tube extend through the first primary bond via the apertures.

Heat exchanger with a bond and a method for manufacturing the same

A supporting beam arrangement () for supporting a flue gas duct () to a support frame () of the flue gas duct. The supporting beam arrangement comprises two horizontal first supporting beams () that are parallel and on two opposite sides of the flue gas duct () and separated by a distance from the flue gas duct, and further are connected to the support frame (). The supporting beam arrangement () comprises a horizontal second supporting beam () defining two opposite ends () that are supported to the first supporting beams (), the second supporting beam extending through the flue gas duct () that is supported to the second supporting beam. At least one or each one of the first supporting beams comprises an opening (), in which opening one of the two opposite ends () of the second supporting beam is placed to rest on the first supporting beam (). A power boiler () comprises the supporting beam arrangement (), the flue gas duct () and the support frame ().

Supporting beam arrangement for supporting a flue gas duct

A scrubber for exhaust gas cleaning onboard a marine vessel, comprising a scrubber shell () forming a scrubber chamber; and a tubular pipe () running through the scrubber shell for feeding scrubber liquid into the scrubber chamber; a concave bowl () for connecting the tubular pipe to the scrubber shell, the concave bowl having the shape of a solid of revolution, and the shape curving smoothly from the rim () of the concave bowl to the bottom () of the concave bowl. The tubular pipe runs through the bottom of the concave bowl in such a way that the bottom encircles the tubular pipe, and the tubular pipe and the bottom are connected to each other. The concave bowl is placed in an opening () in the scrubber shell in such a way that the scrubber shell encircles the rim of the concave bowl, and the scrubber shell and the rim are connected to each other.

Scrubber for exhaust gas cleaning

Growing community of inventors

Pirkkala, Finland

Juha Ojanperä