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Wie wählt man einen Kühler für deionisiertes Wasser im Labor aus?
Pure water usually refers to water that has been treated to remove impurities, ions, organic matter, etc. Common examples include distilled water, reverse osmosis water, and deionized water. Deionized water has low conductivity due to the removal of ions through ion exchange resin. But different applications have different purity requirements, for example, laboratory analysis may require higher purity, while industrial cooling may have less stringent requirements.
Users may need to cool pure water to a specific temperature, such as 2 ℃, so a chiller is required. At this point, it is necessary to consider the type of chiller and whether it is suitable for treating deionized water. Deionized water, due to its low conductivity, may be corrosive to equipment or require specific materials to prevent contamination. In addition, temperature control accuracy is also important, whether to strictly maintain it at 2 ℃ or allow for certain fluctuations.
In the laboratory, some chillers are specifically used to circulate and cool deionized water, maintaining low temperatures, for cooling instruments or reaction equipment. At this point, it may be necessary to confirm whether the material of the chiller is corrosion-resistant, whether it has precise temperature control, and whether it is suitable for treating deionized water.
Pure water refers to high-purity water obtained by specific processes to remove impurities, ions, and microorganisms. Common types include deionized water, distilled water, and reverse osmosis water. Its purity varies depending on the application scenario, for example, laboratory analysis requires ultrapure water (resistivity ≥ 18.2 M Ω· cm), while industrial cooling may use ordinary deionized water.
Regarding the selection of refrigeration equipment, if it is necessary to cool deionized water to 2℃and maintain stability, the following key points should be noted:
A closed cycle chiller made of corrosion-resistant materials such as titanium alloy and 316L stainless steel should be selected to avoid metal corrosion caused by the low conductivity of deionized water.
The equipment should be equipped with a precise temperature control system (with an accuracy of ± 0.1 ℃) and a built-in water quality monitoring module (such as a conductivity sensor) to monitor the purity of water in real time.
Industry adaptation:
In the pharmaceutical field, a hygienic design that complies with GMP standards and is equipped with online sterilization functions (such as ozone or ultraviolet radiation) is required.
Precision instrument cooling: Add variable frequency pumps and buffer tanks to achieve fluctuation control of ± 0.05 ℃.
Industrial application: Modular design, expandable to -10 ℃ working conditions, flow range covering 5-500L/min.
LNEYA has recently developed a deionized water cooling chiller that is particularly suitable for scenarios where pure water is required at 2 ° C~5 ° C during the production process. Room temperature pure water enters the temperature control unit and produces pure water at the desired target temperature, solving the problem of water freezing easily when controlled within 5 ℃. The equipment automatically adjusts the temperature and cooling capacity of the refrigeration system according to different water intake and temperature to achieve the desired DI temperature. By using frequency conversion regulation, the output can be well adjusted even if the inlet flow rate is unstable, achieving a high temperature control accuracy requirement of ± 0.5 ℃
LTZ series Deionized-water Chiller
Temperature control range: +2℃～+20℃
Temperature control accuracy: ±0.5℃
Water flow rate is self-regulated, variable frequency control
