This plant consists of three U-shaped cascaded, vibrating trough conveyors with a total heat exchanger surface of approximately 30 m² and a trough width of 1400 mm. The biggest of the three units is a 12 m long natural-frequency trough conveyor, which is designed like the other two cooling troughs with a series of robust, separately exchangeable tray elements with cooling plates for cooling water at 4 bar. The side walls of the tray elements are also cooled. The individual tray elements are flanged together and largely identical, so that the requirement for spare parts is restricted to a minimum. The cooling plates feature a special distribution system that ensures a uniform flow of cooling water across the complete tray width.