Wood, Paper and Pulp Production

Sawmills, Lumber Mills, Wood Processing Plants, kraft pulp, sulfite pulp mills, Mechanical Pulping Plants, Paper & Paperboard Mills, Finishing and Specialty Paper Plants
Paper and Pulp Production
Boilers, incinerators and combustion units used in the wood, paper and pulp production industry produce dirty exhaust air with a number of pollutants while also generating significant amounts of heat. The heat is a huge challenge to recover when particulate matter such as sawdust, bark and wood debris in the wood operations and pulp slurry, black liquor, lime mud and chemical residues from the paper and pulp industry are generated. Furthermore, the combustion byproducts from boilers and incinerators used in these industries generate fly ash, flue gas residue and soot that can accumulate on heat exchanger surfaces, leading to clogging and reduced heat transfer efficiency.
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Lepido, the heavy-duty industrial heat exchanger, thrives in such harsh environments, recovering energy while allowing particles that would normally clog up the system, to simply pass through with its patented geometry of its recovery coils. The space between the coils is much larger than between fins of a traditional heat exchanger. The result is a unique airflow pattern where most of the particles can pass through the heat exchanger instead of sticking to the coils. This slows down the build-up on the coils and makes the air pressure drop minimal, even if a coating has formed.
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Lepido is resilient against pollutants such as sawdust, soot, residual lacquer and particles and is suitable for diverse applications as it seamlessly integrates into a Run-Around-Circuit, overcoming the Coanda effect. Lepido ensures optimal efficiency and is designed to withstand high temperatures and pressures.

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 The recovered heat can be used to heat replacement air or returned to the process itself by preheating liquid/air. For example, the recovered heat from the exhaust air from drying kilns in the wood industry can be used to preheat incoming air, reducing the energy required to maintain kiln temperatures. Similarly, the waste heat from the drying sections of paper machines, ventilation systems, and boiler exhausts in the paper industry can be recovered by Lepido as the system can handle high humidity and particulate matter, recovering heat that can be used to preheat process water, air for drying sections, or for space heating within the facility. Furthermore, the Lepido  can be integrated into the exhaust systems of recovery boilers and lime kilns in the pulp industry. The system can recover high-temperature heat, which can be used to generate steam or hot water for the pulping process, improving overall energy efficiency. Other use cases for reusing the recovered heat, such as,  from boilers and waste incinerators can be used to preheat combustion air, feedwater for boilers, or for other thermal processes within the plant. Lepido's innovative design facilitates easy cleaning and no downtime.