Vertical boilers
Advantages of the vertical design
Our vertical boilers are characterised by the fact that the flue gas in the convective heating surfaces travels vertically.
The convective heating surfaces in this type of boiler are usually cleaned by sooth blowers. Cleaning with sooth blowers is very effective and minimises the risk of blocking of the tube bundles. To avoid sooth blower-induced erosion, hot tubes (i.e. superheater and evaporator tubes) are protected by stainless steel tube shells.
An advantage of the vertical boiler type is that very compact boilers can be designed because the vertically arranged heating surfaces can use a common hopper for ash extraction, thus optimising performance per tonne of steel in the boiler. The arrangement of the tubes means that the tube bundles do not need separate drains, which is a big advantage with regard to the time required for replacement of these bundles.
