THSD 1t/h-20t/h (700kW-14000kW)

Durabilty for a long service life

This is ensured by an integrated injector nozzle which mixes the cold return water with the hot water in the boiler which means there is less risk of flue gas condensation. For steam boilers the water is distributed at the upper side of the water level by a special drilled tube – this guarantees a fast mixing of colder feed water with the hot boiler water and reduces thermal shocks.

Minimal emissions during all operating conditions

This is achieved by an optimum heating surface geometry and flame tube dimensions which comply with the latest directives. In view of the thermal stress inside the boiler, the boilers are designed to be extremely flexible. A 3-pass firing sequence guarantees extremely low emission of pollutants and optimum burn-out.

Highest efficiency

A water-cooled flame tube rear wall (made from finned tubes) increases the heat utilisation and reduces radiation losses in the boiler. As no additional brickwork (fireclay) is required in the flame tube, maintenance and servicing costs are kept to a minimum.

The secondary heating surfaces are smooth and thus very easy to clean.

The flue gas tubes at the 2'nd flue gas pass on THSD and THW boiler series are special designed and performed as “spiral rolled” tubes, resulting in low flue gas temperatures and optimum efficiency with compact design.

All Hoval industrial boilers are designed as “natural circulation boilers,” allowing for optimum desludging and draining without the need for external circulating pumps.

Depending on the fuel used, especially developed heat exchangers (economisers) can be combined with all boiler types to further boost the efficiency of the boiler and the complete

system.

• Long service life

• Minimal emissions

• High efficiency