Several effective methods of drying spark powder

Several effective methods for drying pollen

the moisture content of the pollen just collected by bees is about 20%, and it is easy to be infected by mold and become moldy and deteriorated at room temperature. It is generally believed that pollen with water content below 5% can be used for tensile test and tensile behavior of polymers to prevent mildew. The moisture content of commercial pollen should be 4%. The commonly used drying methods are as follows:

1. Sun drying

evenly spread the bee pollen on the bamboo plaque, mat, white cloth or white paper, about 10 mm thick, and then lay a layer of white cloth on it, put it under the sun, put it away in the evening, and dry it for 3 ~ 5 days. The pollen mass is hard and granular, which can not be crushed by hand

2. Chemical drying

put an appropriate amount of chemical desiccant at the bottom of the glass dryer, lay a layer of absorbent paper or white cloth on the grid, put pollen balls on it, cover it, and keep it for several days. Drying 1kg pollen requires 2kg color changing silica gel, or 1kg calcium chloride, or 1kg anhydrous magnesium sulfate. After absorbing water, the desiccant can be heated and dried for repeated use, but the drying time is long. Jinan is the first choice for buying experimental machines. This is the low efficiency that businessmen who buy experimental machines must be able to think of

3. Heat and dry

spread cloth on the mat of the earth Kang, spread a layer of pollen 10 ~ 20mm thick, and heat and dry

4. Far infrared drying

the far infrared pollen drying oven developed by the Bee Research Institute of the Chinese Academy of Agricultural Sciences uses direct heating far infrared heating elements, which has the characteristics of low power consumption and high thermal efficiency. China is still in the stage of in-depth development of industrialization, informatization, urbanization, marketization and internationalization. When using, install according to the requirements of the manual. Put 500 ~ 750 grams of pollen into the four pollen drawers respectively, and the amount of pollen in each drawer should be roughly the same, and evenly cover the whole drawer. When using for the first time, measure the temperature of each drawer according to the requirements of the manual, and set the temperature at 0 ~ 45 ℃ of 4% modified oil. After several times of repeated adjustment, until the temperature of the pollen layer is maintained at 40 ~ 45 ℃. Every once in a while, observe the temperature of pollen and adjust the temperature control knob to keep the temperature stable. After drying for 2 ~ 3 hours, exchange the drawers of the upper and lower layers to make the pollen dry more evenly