procedures to achieve a constant product quality and safety in pasteurisierungsanlgen in occurrence of congestion and layout of the implementation of the procedure

摘要

A process and an arrangement for obtaining constant product quality and safety in pasteurization plants in the event of a stoppage are described. The aim is to ensure that, in the event of a stoppage of any length in continuously operated pasteurization plants, over- and underpasteurization are prevented and pasteurization is possible within very narrow tolerance limits (pasteurization unit (PE) tolerances). To this end, inter alia, if a stoppage occurs in the pasteurization plant, which is operated at a constant flow rate adapted to the normal pasteurization requirements, cooling is initiated. The effect of the cooling is to cool the affected region of the pasteurizing zone to a temperature which permits no increase or only a slight permissible increase in the pasteurization units (PE) introduced into the product in this region up to this point in time, and the end position and the duration of the cooling effect are determined by the stoppage time tS. In one proposed arrangement for carrying out the process, cooling water is supplied through fixed spray tubes (5) or pivoting nozzle systems (5a) which can be switched on and off independently of each other along the regions, so that, inter alia, the cooling effect is prolonged in sections, continuously, successively and within a time increment DELTA t.