Precision and reliability are the basics of an optimal and low-loss phase separation. Negele provides a variety of solutions for this purpose!
Phase separation – where and how?
You will find a phase separation in the various areas of the dairy. Particularly
In these three main areas there are basically 4 options for phase separation:
During the phase separation of the cleaning media, the most important point is to classify the media flowing back from the plant and to lead them into the correct storage tank (lye, acid, water). Based on their respective conductivity, these media can be differentiated. Depending on the conductivity of the medium in the return line, the medium in the piping can be identified. Depending on the medium, the subsequently arranged valves are set in such a way that the lye is sent into the lye vessel, the acid into the acid vessel and the water into the stack tank. A most important factor for a low-loss operation is good reproducibility (switch-over always at the same point) of the conductivity measuring unit as well as a rapidly functioning temperature compensation based on the various medium temperatures. The degree of mixing of the various cleaning media and, therefore, the consumption of expensive cleaning concentrates depend on these two factors.Our conductivity measuring unit ILM-4 offers both. The reproducibility of the unit lies at < 1 % from the final value. The temperature compensation is designed in such a way that a secure and reliable separation between lye 80 °C and water 20 °C is even possible after about one second of time
Before and after production or during pump circulation of tanks, the milk product must be differentiated from the water in the line or as used for press emptying. There is a mixture of milk and water at the phase transition. For this reason, the mixing ratio and the concentration, respectively, must be measured in order to carry out the switch-over always at the same point. This can be done with a turbidity measuring unit. Contrary to the time-controlled phase separation, where a safety time interval is envisaged, the product loss can cause considerable costs. Where sensitive milk products such as yoghurt are concerned, which should have a long durability, it is also very important that absolutely no unwanted water can access the end product. Even the smallest amounts of coliform bacteria in the water would reduce the durability period. An access of water into the product cannot be ruled out neither with the time control nor the control by way of volume acquisition. For this reason, both options are second choice. This fact also speaks in favour of the use of the turbidity measuring unit.In order to guarantee a consistent product quality, the reproducibility plays the main role here also - as in all phase separations. Our Negele turbidity ITM-51 is suitable for these applications, for practically all milk products in particular. In the diagram you see the turbidity of various milk products as a factor of the concentration. By means of the switch outlet or analogue outlet, the switch-over is carried out between the two phases at a defined product concentration. The assembly work is low because the equipment unit is built into the process by way of a weld-in socket joint.