ITM-3 and ILM work together to solve the problem of phase separation in dairy plants

Description

　　Anderson-Negele provides a full line of instrumentation products for the dairy industry. The ITM-3 front-end flush turbidimeter effectively identifies the milk-water separation interface, switches accurately, significantly reduces milk wastage, and reduces waste-water treatment workload.  However, the phase monitoring between the CIP circuit cleaning fluid requires precise positioning using the ILM conductivity meter. Together, the two can completely solve the problem of accurate measurement of phase switching in dairy plants.
　　In dairy production, phase separation exists in multiple stages, and Anderson-Negele can provide accurate and reliable phase separation solutions. Phase separation is used at all stages of the dairy plant.
　　especially
　　• Phase separation from the CIP-return line to the cleaning fluid
　　• Drain (flush) production equipment to switch between product tanks and feed tanks and/or between sewage and other media.
　　• Separate milk and water in the return line.
　　In these three aspects, there are four main phase separation methods:
　　n manually, through the observation window (only possible in some cases)
　　n Automatically, through time control
　　n Automatic, acquired by volume
　　n Automatic, through conductivity and turbidity
　　Comparison of various methods:
　　Manual switching and time control
　　The two methods mentioned first are more complicated and cause great losses. When it comes to manual switching and time control, the investment cost is lower. However, their follow-up costs during the 10-year operating period of the plant are extremely high. This can be seen from the following: If there are 4 phase transitions per week, and each phase change loses 10 liters of product, 10,400 liters will be lost within 5 years. Multiply it with the profit of the product. To prove this: 10 litres of product is loaded into a pipe of approximately 3m length and rated width DN65. The flow rate is 1 meter/second, which means that a 10 liter product will disappear in as little as 3 seconds!
　　This manual switch cannot be used in the CIP area. It requires more manpower and can fluctuate greatly depending on the employee and the daily briefing. => Quality difference, product loss and staffing.
　　Switching through time control must take into account certain safety intervals to avoid excessive water entering the product tank. => To a certain extent, the product has a huge loss
　　Phase separation by volume acquisition
　　With respect to product loss, switching by volume acquisition is better than passing the time control method. However, according to the factory, the volume acquisition is very complicated. Especially when it comes to larger equipment, when multiple tanks are connected to one production unit, it is difficult to calculate the emptying of the water-carrying equipment and switching immediately after the equipment is emptied, because the direction of the pipeline and the volume of the tank are different. In addition, water cannot exist in the device.
　　=> To a certain extent, product losses; residual risks - water in products; start-up and planning stages are very complicated
　　Phase separation by conductivity and turbidity
　　Phase separation using sensors is the most economical solution. The sensor is installed within a short distance upstream of the switching valve and can switch precisely at a preset product concentration. Water can be found immediately. Since switching points are not related to volume and time, planning and startup costs are lower. This also maximises the safety and reliability of excess moisture in the product.
　　=> Minimal product loss; no quality difference; maximum safety and reliability; no personnel requirements
　　Solutions from ANDERSON-NEGELE
　　It can be clearly seen from the previous section that the use of clear and deterministic measurement technology for phase separation is the most reliable solution and is also the most cost-effective. Anderson-Negele offers measurement technology solutions for all major phases of phase separation.
　　In the CIP return line, the conductivity measuring device ILM is suitable for phase separation of the cleaning medium.
　　The identification of residual milk in the pre-wash water and the switching of the production plant during drainage can be achieved with the turbidity measuring device ITM-3.
　　Individual application description
　　CIP return line
　　In the phase separation process of the cleaning medium, the most important point is to classify the medium returned from the apparatus and introduce them into the correct storage tank (lye, acid, water).
　　According to their respective electrical conductivity, these media can be distinguished. Based on the conductivity of the medium in the return line, the medium in the pipe can be determined.
　　Depending on the medium, subsequent valves need to be set so that the lye enters the lye container and the acid enters the acid container, allowing water to enter the raw material tank.
　　One of the most important factors for low-cost operation is the good reproducibility of the conductivity measuring device (always switching at the same point) and temperature compensation that reacts quickly to different media temperatures.
　　Therefore, the degree of mixing of different cleaning media and the amount of expensive cleaning concentrate depends on these two factors.
　　Anderson-Negele's conductivity measuring device ILM is both. The reproducibility of the equipment is less than 1% of the final value. The temperature compensation should be designed to ensure a safe and reliable separation between 80°C lye and 20°C water even in approximately one second.
　　Equipment start-up and emptying - safe and reliable, no product loss
　　Dairy products must be differentiated from the water in the production line before and after the production or during the pump cycle of the tank. When the phase changes, there will be a mixture of milk and water. Therefore, the mixing ratio and the concentration must be determined separately so as to always switch at the same point.
　　The assay can be performed with a turbidity measuring device. In contrast to the time-phased phase separation (which sets a safety interval), product losses can cause cost increases.
　　For yoghurt products that are fragile and require a long shelf life, it is important that no excess water enters the final product. Even the smallest amount of E. coli in the water will shorten the product's shelf life. Whether it is time control method or volume acquisition method, it is impossible to avoid water entering the product. Therefore, neither of these methods is the best choice. This fact also applies to the use of a turbidity measuring device.
　　To ensure consistency in product quality, repeatability also plays a major role here - just as in all phase separations.
　　The Anderson-Negele Turbidimeter ITM-3 is ideally suited for these applications and is actually suitable for all dairy products. As can be seen in the figure, the turbidity of various dairy products is a factor of concentration. Through the switch outlet or the analog outlet, the switchover occurs between the two phases when the specified concentration is reached. The starting point for assembly work is very low, because the equipment unit is connected to the process through the weld-in socket joints.
　　Turbidity diagram
　　With a phase change, the product concentration will change due to the increase or decrease of the amount of water. This leads to changes in turbidity. The graph shows that the turbidity measured with ITM-3 is a factor for the concentration of various dairy products. In the process of starting and emptying the equipment, it is possible to set a strictly specified switching point between the product and the water in this way. This can avoid product loss and improve quality.
　　worth having!
　　This turbidimeter minimizes product loss and quickly recovers costs. You can calculate it yourself! You can use the following method to calculate the profit of the milk-water phase separation using the turbidity measuring device ITM-3 during startup and emptying of the equipment.
　　Applications
　　The conductivity measuring device ILM-2 is used for the separation of the cleaning medium in the CIP return line. One for each CIP circuit. Based on the conductivity, the medium in the pipe can be determined and redirected back to the correct CIP container. The turbidity measuring device ITM-3 is used for milk-water phase separation. Use during emptying of production equipment. After production, flush the equipment with water to empty it. With ITM-3, you can accurately determine when the device is completely empty.

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