Contaminant type and its cleaning method.
Types of contaminants Cleaning agents Fat oils Mixtures of chloroform and toluene Polar substances Dimethylformamide Salts Carboxamide Resins Macromolecules Alcohols Acetone Diethyl ether pigments Substances Diluted bleaches (3) Under normal conditions'' The drift of the instrument is a few microliters per minute (referring to the amount of Karl Fischer reagent consumed in unit time in order to keep the titration cell dry; this reagent is used to titrate the water in the titration cell on the one hand''. On the other hand, it compensates for the consumption of iodine caused by slow side effects.) If the drift value increases, you must check the instrument's tightness or consider regenerating the molecular sieve. During regeneration, the molecular sieves are dried in a drying oven at 160-300° C. for at least 24 h. The molecular sieve installed on the waste bottle must be cleaned with distilled water before regeneration because it contains water and sulfur dioxide.
(3) The buret is washed with absolute ethanol solution. Do not place the burette above 40°C.
(4) The instrument must be placed in a dry and clean environment'' and arranged for safekeeping; if not used for a long period of time, all the reagents in the instrument must be withdrawn'' and all lines should be cleaned'' and air dried.
The general sample can be selected by Guanya Moisture Analyzer to measure the moisture. The operation is simple and the measurement is convenient.
An air heat exchanger is a device that is used to transfer heat between two air streams. It is commonly used in heating, ventilation, and air conditioning (HVAC) systems. The heat exchanger can be designed to allow the two air streams to be either separately or together.
Generally, we classify the air heat exchanger into Finned Tube Heat Exchanger, Plate Type Air Heat Exchanger, Seamless Pipe Air Heat Exchanger, Twisted Heat Exchanger, etc. according to its structure.
Air heat exchangers are commonly used for a variety of applications in the HVAC system, such as space heating, cooling, humidification and air circulation. In space heating applications, air heat exchangers are used to transfer heat from outside air to indoor air, in order to provide heat for the building. In cooling and air circulation applications, air heat exchangers are used to transfer heat from an indoor space to the outside. in order to keep the building cool.
The main advantage of using an air heat exchanger is that it is very efficient in transferring heat energy between the two streams without any loss. It is also relatively inexpensive, compared to other types of heat exchangers. Additionally, air heat exchangers are small and compact, making them ideal for applications in tight spaces.
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