ANDRITZ debuts PrimeDry HotAir Box for efficient tissue drying

AUSTRIA – International technology group ANDRITZ has introduced the PrimeDry HotAir Box, an innovative solution designed to help tissue producers enhance machine efficiency while reducing energy consumption and CO₂ emissions.

Tissue drying is notoriously energy intensive. The PrimeDry HotAir Box tackles this challenge by recovering hot, wet exhaust air from the drying hood and reusing it. After separation through an air-to-air heat exchanger, the exhaust air is filtered and blown evenly onto the tissue web before the suction roll.

This process increases the web’s temperature, reducing water viscosity and resulting in higher dryness after the press stage.

The system significantly reduces the total energy required to achieve final paper dryness or enables increased production with the same energy input.

The PrimeDry HotAir Box also includes a retractable system for easy maintenance, tail threading, and cleaning, with automatic filter cleaning for uninterrupted operation.

Designed to fit any suction press configuration, the technology suits new installations and system rebuilds.

Expansion into sustainable packaging

In September, ANDRITZ announced a strategic partnership with PulPac, a Dry-Molded Fiber (DMF) technology provider, expanding its sustainable solutions portfolio.

DMF technology, a nearly waterless process, molds cellulose fibers into three-dimensional, recyclable, and biodegradable packaging products such as coffee lids and food trays. This innovation aims to reduce single-use plastic consumption significantly.

The partnership combines PulPac’s proprietary DMF expertise with ANDRITZ’s extensive knowledge in turnkey pulp mills, web-forming processes, and recycling technologies.

ANDRITZ will now offer complete DMF production lines tailored to meet the growing demand for eco-friendly packaging.

“This partnership with PulPac enables us to engineer economically viable and resource-saving solutions for Dry Molded Fiber products, contributing to the reduction of single-use plastics,” said Andreas Lukas, Division Manager of ANDRITZ Nonwoven & Textile.

“This aligns perfectly with our commitment to driving the green transition.” 

The collaboration has already yielded operational DMF industrial lines integrating PulPac’s technology with ANDRITZ’s strategic components.

PulPac COO Viktor Börjesson noted, “Teaming up with ANDRITZ unlocks great potential by combining our innovative technology with their expertise in forming, converting, and recycling. We look forward to scaling sustainable packaging solutions together.”

With the launch of the PrimeDry HotAir Box and its continued focus on eco-friendly innovations, ANDRITZ reinforces its commitment to driving energy efficiency and sustainability across industries.

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