High-purity quartz sand drying equipment

　　1. High thermal efficiency: Heat enters from the "hot air inlet" and passes through the internally arranged heat exchange pipes. Wet sand enters from the top, passing through the 3-2-1 layer hopper to absorb heat from the heat exchange pipes, gradually increasing the temperature. The entire drying process wastes little heat.

　　2. During the drying process of acid-washed quartz sand, the residual acid gas emitted from the sand has a particularly strong corrosive ability, which can corrode materials such as stainless steel, adding "black spots" to the white quartz sand and reducing its whiteness. The material of this dryer that contacts the quartz sand is aluminum, which will not affect the whiteness of the quartz sand.

　　3. Heat is transferred through the heat exchange pipes. The hopper and the flue system are independent of each other, avoiding direct contact between impurities in the heat and the white quartz sand, which will not reduce the whiteness of the quartz sand.

　　4. Fuel diversity: It can use firewood, coal, diesel, bio-oil, bio-pellets, liquefied gas, and natural gas.

　　5. Unique exhaust design, reducing secondary pollution of the sand by acid gas in high-temperature steam.