Installation of a new air purification system at Daka
23.03.2021
The new air purification system is scheduled to go into operation at Easter, and the first test runs of the new system will start in week 12.
The construction site at the Daka factory in Randers is busy as the new air purification plant gradually takes shape. The foundations have been laid and the four large combustion chambers have been installed. These weeks, the ceramic tiles that optimise combustion are being installed inside the chambers, and in the coming weeks the new air purification plant will be connected to the electricity and gas supply as well as to cooling water and compressed air.
The plan is for everything to be fitted and ready for the first test runs in week 12, before the plant is scheduled to be ready for proper testing when the factory shuts down for the Easter holidays. Once the plant is tested, there will be a run-in period during which both the new and the old plant will be available should anything unexpected happen.
The air is burnt twice to maximise odour reduction
The investment in the new air purification plant amounts to just over DKK 15 million for the purchase and installation of the internationally recognised technology. It is a so-called regenerative thermal oxidiser (RTO), which is optimised for cleaning industrial waste air with organic odours, as is the case at Daka.
The plant oxidises the unwanted odour molecules at very high heat, 800-1000°C, converting them into water vapour and CO2. At the Daka plant, the air is burnt twice in succession to remove as much odour as possible. This gives the plant a purification rate of over 99%.
“It has been important for us to achieve as high a purification level as possible. That is why we have invested in a process that burns twice. We want to achieve an improvement in the odour emissions compared to the current odour incinerator, but as we have said before, it is impossible to completely eliminate the odour with the type of raw material we work with”, says Martin Botolf Sejer – Factory Manager
The new plant is supplied by Danish company Reecon, which specialises in air purification systems and carries out projects all over the world. The plant, which is being installed at Daka, has a very high degree of heat recovery to minimise gas consumption.