Decarbonisation with Proven Payback

Processes such as TMP, smelt dissolving, lime kilns, recovery and power boilers, pulp dryers, and tissue machines all have substantial heat loss. At the same time, mills must heat large volumes of freshwater for process and boiler feed, particularly in winter, when replacing exhausted process air with fresh make-up air drives energy use even higher.

This combination of high heat loss and constant heating demand creates one of the largest efficiency opportunities in the industry. Even with existing recovery systems, significant latent heat often remains untapped.

From the black liquor cycle in Kraft mills and TMP in mechanical pulping to tissue drying and biomass utilisation, we understand how mill processes connect. This allows us to capture and reintegrate heat where it provides the greatest operational and financial benefit without disrupting production. When waste heat exceeds immediate demand, we apply advanced solutions such as heat pumps and mechanical vapour recompression to raise its temperature, even to steam, and return it to the process.

Exhaust streams carry paper fibres, dust, and potentially corrosive compounds that quickly foul conventional equipment.  

Our systems are engineered for particulate-laden, corrosive exhaust streams and designed to operate at peak efficiency for years with minimal intervention. Robust filtration, fouling-resistant surfaces, and corrosion-resistant materials keep maintenance low and reliability high, even in the most aggressive pulp, paper, and tissue mill environments. 

In addition, the systems are fully redundant, allowing maintenance to be carried out without affecting normal process operation. 

The areas where heat is available and where it can be used are often separated by significant distances, with piping routed through crowded plant layouts and exterior runs exposed to freezing conditions.

Our systems are engineered to operate reliably under these realities, built with full redundancy so that critical functions and existing systems remain online during maintenance or unexpected issues, protecting uptime in high-cost, 24/7 production environments.

Thermal Energy International manages projects all the way through from technical evaluation to commissioning. All systems are engineered to meet applicable safety, emissions, and regulatory standards, ensuring smooth approvals and long-term compliance. With fixed pricing and single-point responsibility, Thermal Energy International minimises internal workload and risk while meeting site and corporate expectations. Thermal Energy International gets projects done.

Plants are under pressure to meet stringent CO₂ reduction commitments, yet capital budgets are often prioritised for production projects, leaving limited scope for investment in energy efficiency. Through Energy as a Service, Thermal Energy International finances and delivers projects, enabling immediate reductions in energy costs and emissions without affecting core operational budgets.