Scalding is carried out with 60 °C (140 °F) warm humid air instead of water. The scalding equipment is constructed in a sandwich construction style and insulated. There is a fully accessible stainless steel tank located at the bottom of the scalding tunnel. Air deflector plates are installed on the interior walls. Fans are aspirating the air in the upper part of the tunnel and circulate this air in exterior channels. During this operation the air is moistened and heated by water vapor. The fans blow the heated air through the lower part back to the scalding tunnel. The air deflector plates push the heated air onto the carcasses where water vapor condenses which creates the scalding effect.
To avoid any risk of corrosion in the scalding tunnel, the conveying system has been installed outside of the scalding tunnel; based on a patent registered design. The looped chains for the carcasses are introduced through a slot in the celling of the scalding channel that is sealed with brushes. There are insulated doors allowing access to the tunnel. Proven and reliable control units perform the process and the automatic temperature control.
Water scalding tunnel