Number of germs reduction by heat exchanger

Distributing the deionized water, but in the right way Especially regarding the small ring main systems and storage containers an increased biological contamination can easily happen due to the increased temperature of the deionized water. What to do, when the requirement of the highly pure (deionized) water is very wavering? The cause of that is the energy input of the recirculation pump. That and the lacking of refeeding of cold, freshly purified water take the temperate of the deionized water up to >30°C within few hours. After that the number of germs gets significant higher, the doubling time of the micro-organisms decreases just as fast. The reduction of the production of the pump is unfortunately only a theoretical attempt as the biofilm formation will grow when the flor rate falls below 1m/s. The solution lies in the installation of a heat exchanger that reduces the temperature to around 20°C. As you can see in figure 1, the number of germs sinks only in short time after putting the heat exchanger into service. An important other cause of contaminations is the quality of the ring main. Beside the roughness of the material, kind of the welding plays a vital part. Polypropylenes (PP) or polyvinyl difluoride (PVDF) are worthy of consideration regarding the material. Our experience tells us that the infrared spectroscopy is necessary to keep the water quality upright. With it, on defined conditions with help of a welding machine, the two workpieces are being welded. The heating takes place indirectly with help of an infrared cell. For usage in the pharmaceutical industry and for next requests, the pressure resistance welding process (WNF welding process) recommends oneself, during that through the introducing of a bale on the welding point all kinds of bulging are being stopped. Conclusion: Deionized water pipes of < 10cm and a storage capacity of < 500l hold a big potential of contamination regarding the biological quality. Resolving is an infrared welded ring main together with a heat exchanger.

Especially regarding the small ring main systems and storage containers an increased biological contamination can easily happen due to the increased temperature of the deionized water. What to do, when the requirement of the highly pure (deionized) water is very wavering? The cause of that is the energy input of the recirculation pump. That and the lacking of refeeding of cold, freshly purified water take the temperate of the deionized water up to >30°C within few hours. After that the number of germs gets significant higher, the doubling time of the micro-organisms decreases just as fast. The reduction of the production of the pump is unfortunately only a theoretical attempt as the biofilm formation will grow when the flor rate falls below 1m/s. The solution lies in the installation of a heat exchanger that reduces the temperature to around 20°C. As you can see in figure 1, the number of germs sinks only in short time after putting the heat exchanger into service. An important other cause of contaminations is the quality of the ring main. Beside the roughness of the material, kind of the welding plays a vital part. Polypropylenes (PP) or polyvinyl difluoride (PVDF) are worthy of consideration regarding the material. Our experience tells us that the infrared spectroscopy is necessary to keep the water quality upright. With it, on defined conditions with help of a welding machine, the two workpieces are being welded. The heating takes place indirectly with help of an infrared cell. For usage in the pharmaceutical industry and for next requests, the pressure resistance welding process (WNF welding process) recommends oneself, during that through the introducing of a bale on the welding point all kinds of bulging are being stopped. Conclusion: Deionized water pipes of < 10cm and a storage capacity of < 500l hold a big potential of contamination regarding the biological quality. Resolving is an infrared welded ring main together with a heat exchanger.

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