Valmet MVR Evaporators

MVR (Mechanical Vapor Recompression) is a good way to improve the mill’s overall steam economy and condensate segregation. Valmet’s MVR evaporators are optimized for minimum fan power, which lowers the operating cost.

MVR improves overall steam economy

Low operating cost through Valmet's design with minimized fan power

MVR: black liquor pre-evaporation, sulfite spent liquors, BCTMP and mill effluents.

In an MVR Evaporator, a fan or turbine drives the evaporation. The fan creates energy for the evaporation by increasing the steam pressure.

Valmet’s MVR evaporators are designed for low fan power. This lowers the cost of energy and thereby the operating cost for the MVR evaporators.

MVR Evaporators are especially suitable for concentrating liquors with a low boiling point rise. MVR is often used for black liquor pre-evaporation, evaporation of sulfite spent liquor and evaporation of mill effluents. BCTMP mills can often benefit from installing MVR evaporators.

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MVR evaporators at Cenibra

The two MVR pre-evaporators Valmet delivered to Cenibra (Celulose Nipo-Brasileira) in Brazil significantly improved the overall steam economy and condensate segregation at the mill. Capacity: 235 tons/h.

Evaporation Technologies

Tubel Evaporators

Valmet’s well-proven Tubel design has been shown to provide greater availability in high dry solids or scaling applications.

Valmet Tube Evaporator

Our tubular falling film evaporator is well proven and mechanically reliable. It provides a smaller footprint and excellent condensate segregation.

Valmet Vapor Recycling

Valmet’s Vapor Recycling can help save high pressure steam. The innovative vapor recycling concept makes it possible to evaporate to high dry solids using only LP steam. High pressure steam can be saved for other uses in the mill.

Valmet MVR Evaporators

High-performance condensate handling

Valmet Evaporation plants can be designed to produce condensates that can be completely reused in the mill. This greatly reduces the mill’s consumption of fresh water.

Success in evaporation

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Pulp mill process and production optimization

Study production line’s current condition, performance and improvement potential by performance monitoring, data analysis, trials and e.g. process stability studies and audits of the wood handling, cooking, fiberline, pulp drying and baling equipment, white liquor and evaporation plant, recovery boiler, lime kiln etc.

Field services for evaporation plants

To get the most out of a maintenance shutdown, the evaporation plant should be regularly examined. Valmet’s evaporation inspections, audits and maintenance shutdown activites covers the plant safety, mechanics and the process. Any findings that require an immediate maintenance measure will be communicated directly to the customer. Our target is to help customers ensures high availability, performance and stable operations.

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The project is progressing according to plan and on schedule. The mill’s start-up is scheduled in the third quarter of 2023.

Our expertise is at your service

Valmet’s focus is to bring your performance forward. We work to ensure that you get the most from your evaporation plant. To get in touch with us, use the link below, or get in touch with your local Valmet office.

Valmet MVR Evaporators

MVR evaporators at Cenibra

Valmet Evaporation Brochure

Valmet service for evaporation plants

Local websites