PaperAge Magazine

Valmet to Supply New Recovery Boiler and Evaporation Upgrade for Metsä Board's Husum Pulp Mill in Sweden

Metsä Board Husum mill Valmet's delivery includes a new high-power recovery boiler with a capacity of 4,300 tDS/d (tonnes dry solids a day) replacing two old recovery boilers at Metsä Board's Husum pulp mill in Sweden.

Nov. 26, 2019 - Valmet and Metsä Board have signed an agreement for the supply of key technology for the planned renewal of the Husum pulp mill in Sweden. The supply covers a new recovery boiler and an upgrade of the existing evaporator with a new super concentrator.

Valmet noted that the contract is conditional upon Metsä Board making the final investment decision after receiving the environmental permit, which is estimated for the second quarter of 2020, at the earliest.

The value of the order will not be disclosed, but Valmet said an order with this scope of supply is usually valued in the range of EUR 100-150 million.

“The planned investment in the recovery boiler will reduce the energy costs of the mill, improve the reliability of production and decrease the duration of the annual maintenance shutdown,” said Ari Kiviranta, Senior Vice President, Development, Metsä Board Oyj. “Own electricity generation, entirely based on renewable biomass, will double and increase the self-sufficiency in electricity of the integrate to over 80 percent. The investment would be a substantial step to take us towards our target of 100% fossil free mills.

Valmet's delivery includes a new high-power recovery boiler with a capacity of 4,300 tDS/d (tonnes dry solids a day) replacing two old recovery boilers. The recovery boiler has multiple high-power features, including high steam parameters and patented heat recovery from flue gas to combustion air.

The boiler is designed to fulfill tight emission regulations with multilevel air system to optimize the combustion to reach low NOx levels and the dust emissions are removed with Valmet's own electrostatic precipitator (ESP) technology. Valmet will supply all auxiliary equipment for the recovery boiler including electrification and instrumentation.

The upgrade of the existing evaporators with a TUBEL Super Concentrator will increase the final dry solids of the black liquor and by this increase the steam production in the recovery boiler. The open design of the Valmet TUBEL technology eliminates tube plugging and provides the highest mechanical reliability.

In addition, the delivery includes Valmet Industrial Internet platform for connectivity for Performance Center services, enabling future use of value adding applications.

The equipment is scheduled to be in operation by the end of 2021.

About Husum Mill

Metsä Board Husum mill, which employs about 700 people, is an integrated board and pulp mill producing fresh fibre folding boxboard, white kraftliner as well as bleached market pulp. A new extrusion coating line started up in spring 2017. The mill has the annual capacity to produce 400,000 tonnes of folding boxboard, 250,000 tonnes of white kraftliner, and 730,000 tonnes of bleached kraft pulp.

Valmet is a leading global developer and supplier of process technologies, automation and services for the pulp, paper and energy industries. To learn more, please visit:

SOURCE: Valmet