The liquid powder passes through the various components of the laboratory micro-spray dryer, and the dry powder is elegantly dropped into the rough receiving bottle. These hard-to-collect samples can generally be used, but also To see the specific situation, provide the following points for your reference:
1. In the same case, the fine powder in the main receiving bottle will be lighter than the coarse powder in the coarse receiving bottle, and the difference is not big, which may be related to light refraction.
2. When the setting temperature is too high, the material color will become darker.
3. There is a sticking wall in the drying tower and the upper part, which will deteriorate under high temperature baking for a long time, and will fall off, and the powder will be mixed together.
4, the difference in color of different materials themselves (when there is separation). Therefore, the color depth is not necessarily a paste, and the set temperature (inlet; outlet) can be set differently and adjusted. It is also possible to directly analyze the coarse powder.
Sticky wall problem:
The sticking problem of the spray dryer really makes the experimenter have a headache, especially the sample that is more expensive than the spray dryer, the experience of “cutting the meatâ€! These samples have condensed the blood and sweat of the experimenter for many years. The instrument can be experienced by the instrument. The method of spraying a layer on a drying tower by a brand is tried to solve it. The Hengren uses the structure and operation of the instrument to reduce the stick wall. loss.
In the spray drying process, the phenomenon that the dry material adheres to the inner wall of the drying tower is generally called a sticking phenomenon. Stickiness is an important issue that must be considered in spray drying experiments.
The effect of sticking on the experiment:
★ Sticky wall materials stay on the inner wall for a long time, which may be burnt or deteriorated, affecting the quality of the sample;
★ The agglomerated material falls into the sample of the receiving bottle, so that the sample can not reach the specified moisture content;
★The agglomerated material falls into the sample, so that the sample has to increase the crushing process to achieve a certain fineness;
★ Remove the sticky material during the spray drying process, and have to stop the experiment in the middle, which affects the effective operation time of the experiment;
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