Egg dyeing – exhaust air treatment for roller and spray dyeing machines

For an egg-dyeing plant, PlasmaAir AG designed and supplied Düsenbodenwäscher to remove ethanol from the exhaust air of roller-dyeing and spray-dyeing machines. Both systems were tailored to the respective ethanol loads and on-site conditions. This technology provides a cost-effective way to meet statutory emission limits, even at high concentrations in the untreated exhaust gas.

INITIAL SITUATION

During the roller and spray colouring of eggs, ethanol-containing vapours and paint residues are released and must be treated before being discharged outdoors. As the two types of machine produce different emissions and ethanol concentrations, two separate systems have been designed: Düsenbodenwäscher for the roller colouring machines, and a combination of a dry filter and a Düsenbodenwäscher for the spray colouring machines.

OUR SOLUTION

PlasmaAir AG supplied Düsenbodenwäscher with associated measurement, control and instrumentation technology for both applications:

The low-maintenance Düsenbodenwäscher remove the volatile, water-soluble hydrocarbons using a once-through water process; the water flow rate is automatically adjusted to the raw gas concentration to meet the clean gas limit with minimal water consumption.
For the exhaust air from the spray dyeing machines, which was also contaminated with paint residues, an upstream cartridge filter with a PTFE membrane was additionally integrated to prevent clogging by entrained paint particles.
Both systems are equipped with an electrical control system, including visualisation, which controls and monitors the fan, water supply and wastewater pump.