Recover The Heat Your Dryers Throw Away
Drying, steam and CHP engineering for mills where heat is the product cost. We audit, design and verify the measures that cut energy per tonne without touching sheet quality.
Where The Energy Actually Goes
Four verified numbers that frame every energy conversation in this sector.
Sources: IEA, Valmet, Cepi, Global Efficiency Intelligence
The Pressures Squeezing Every Mill
Six problems we hear from mill engineering managers, energy managers and operations directors.
Dryer hoods heating the sky
Warm, humid exhaust leaves the hood around the clock, and most of its heat goes straight to atmosphere. It is typically the largest recoverable energy stream in the building, yet it rarely has a project owner or a budget line.
Steam systems degraded over decades
Trap populations nobody has surveyed in years, bare pipework and valves, condensate dumped to drain and flash steam vented. Each loss looks small on its own. Added up across the distribution system, they quietly inflate every tonne you make.
CHP dispatch built for yesterday's prices
The turbine was sized and the dispatch logic written for a fuel and power market that no longer exists. The spark spread has moved through several cycles since commissioning, and what was once obviously profitable running may now be marginal.
Moisture control trading off against energy
Machine crews run the dryers hot and safe because a moisture excursion costs more than steam does. Without hood balance data and pocket ventilation control, the energy bill silently pays for that insurance every shift.
Fibre and energy costs squeezing margin together
Both of your largest input costs have risen at once, and you control neither price. Energy per tonne is the variable you can actually engineer, which makes specific energy consumption the most useful number in the monthly review.
Biomass strategy unclear
Bark, residues, gas and grid power all compete in the fuel mix, and carbon prices keep moving the answer. Without a current techno-economic model, boiler and fuel decisions stall, and so does the decarbonisation roadmap behind them.
What We Engineer In Your Plant
The sub-systems that set a mill's energy per tonne, and what we do with each of them.
Drying sections and hood heat recovery
We measure the hood balance, raise exhaust dew point towards 60 to 65 degrees C and design multi-stage recovery to supply air, white water and fresh water.
Press section dewatering
We assess shoe press performance, felt condition and nip management, because each percentage point of post-press dryness typically cuts dryer steam demand by roughly 4%.
Steam and condensate systems
We survey traps, thermocompressors and cascade condensate loops, then specify the repairs, insulation and flash steam recovery that stop the losses.
CHP and biomass boiler optimisation
We model turbine dispatch against current spark spreads and fuel mix so the plant runs for today's prices, not the ones it was commissioned for.
Vacuum systems
We drop unneeded vacuum levels, add variable speed drives and evaluate liquid ring to turbo blower conversions, measures that commonly save 20 to 50% of vacuum power.
Refining loads
We benchmark refiner specific energy, where TMP lines typically draw 2 to 3 MWh per tonne, and verify that refiner heat recovery to process steam is actually delivering.
Compressed air
We fix leaks, lower pressure setpoints and right-size compressors, with 10 to 30% savings on the affected systems being a credible audited range.
Heat upgrading with MVR and heat pumps
We evaluate mechanical vapour recompression and high temperature heat pumps for lifting hood exhaust and effluent heat back to low pressure steam.
How EM3 Helps
Three service pillars, each angled at how a mill actually buys engineering.
Energy Audits & Compliance
Mill-wide thermal audits that rank dryer, steam, vacuum and CHP opportunities by payback, alongside EU ETS, ESOS and ISO 50001 support. You get an investment-grade opportunity register, not a slide deck.
Design & Projects
Detailed design and delivery of hood heat recovery, steam system renewal and CHP optimisation projects, installed inside your planned shutdown windows. We engineer around runnability and moisture control, not despite them.
Energy Management & Intelligence
Specific energy per tonne monitoring built on sub-metering and monitoring and targeting baselines, with savings verified to IPMVP. When a measure drifts, you see it before the bill does.
How The Work Gets Done
Every engagement follows the same engineering discipline, whatever the sector.
Audit
Instrumented, engineering-led, and baselined against your production data.
Roadmap
A costed, sequenced register of measures your board can fund in steps.
Delivery
Designed and delivered around production, never in spite of it.
Verify
Savings measured against the baseline and verified to IPMVP.
Proof From The Machine Floor
Anonymised, verified results from drying, steam and heat recovery work in mills and panel plants.
16%thermal energy reduction on the machinePaper & boardHow a European paper mill cut machine thermal energy by 16% with hood heat recovery
A packaging paper mill was exhausting most of its dryer section heat to atmosphere through an ageing hood running at a low…
12%steam system losses recoveredWood panelsHow a wood panel plant recovered 12% of steam system losses without replacing its boiler
A wood panel plant's steam system had grown over decades: an unsurveyed trap population, bare pipework, dumped condensate and vented flash steam.…
Regulation As A Roadmap
Regulation in this sector arrives with deadlines and carbon prices attached. Treated properly, it is a funded roadmap for the projects you already wanted to build.
EU ETS
Every tonne of fossil CO2 from boilers and CHP now carries a market price, which changes project paybacks year on year. We quantify the carbon value of each measure and build it into a ranked abatement plan.
ISO 50001
The standard demands an energy management system with real baselines and performance indicators, not a binder on a shelf. We build EnPIs such as specific steam consumption per tonne into daily operations and support certification.
CSRD
Corporate sustainability reporting requires energy and emissions data that survives an auditor. Our sub-metering and monitoring and targeting infrastructure produces the numbers behind the disclosure, traceable from meter to report.
ESOS
The UK scheme mandates recurring energy audits for large undertakings. We turn the compliance exercise into an investment-grade register for your mills, so the audit pays for itself in identified projects.
National audit schemes
EU Energy Efficiency Directive obligations and national equivalents require periodic audits across member states. We deliver them to one consistent methodology across multi-country mill portfolios, with one point of accountability.
Engineers Who Live In The Mill
Your first conversation is with our commercial team. Delivery is by engineers who spend their weeks in dryer sections, boiler houses and turbine halls.
Daniele Dominguez
Commercial Director
Senior Energy Engineer, Drying & Heat Recovery
Owns hood balances, dew point control and the design of multi-stage heat recovery systems.
Steam & Utilities Engineer
Owns trap surveys, condensate return, insulation programmes and boiler and CHP performance.
Energy Manager, Monitoring & Targeting
Owns specific energy per tonne baselines, sub-metering design and IPMVP savings verification.
Field Notes For Mill Engineers
Articles and case studies on drying, steam and heat recovery, written by the engineers who deliver the work.
FrameworkThe industrial decarbonisation roadmap framework
A step-by-step framework for turning a decarbonisation ambition into a credible, costed, sequenced plan. Covers the energy baseline, the marginal…
ArticleWhy dryer exhaust is the biggest prize in the mill
ArticleFrom feasibility studies to final design: navigating the stages of an energy efficiency project
Common questions from wood, paper & pulps teams
How much heat can a dryer hood recovery system capture?
On a large modern paper or board machine, the exhaust can carry more than 50 MW of recoverable heat, equivalent to roughly 86 tonnes of steam per hour. What you actually capture depends on the sinks available: supply air, white water, fresh water and ventilation. Documented rebuilds have delivered around 14% site energy savings with payback inside one to two heating seasons. A hood balance and dew point survey tells you your machine's number before any capital is committed.
Does heat recovery affect sheet moisture control?
Not when it is engineered properly. Recovery sits on the exhaust side of the hood, downstream of the sheet. The work that raises recovery potential, balancing supply and exhaust air, controlling pocket ventilation and lifting exhaust dew point towards 60 to 65 degrees C, is the same work that stabilises the drying environment. We design around the machine's moisture profile and verify it before and after commissioning.
When does CHP still make sense?
Around half of the electricity consumed by the European pulp and paper sector is already produced on site through cogeneration, so the question is rarely whether to have CHP but how to run it. The economics swing with the spark spread, the gap between power price and fuel cost. We model dispatch against current fuel, power and carbon prices, and revisit it through each price cycle rather than leaving the plant on commissioning-era logic.
