6wh-6 LPG hand-pulled louver dryer controls baking by adjusting cold air and damper. Hand-pulled louver dryer has the characteristics of simple structure, good tea drying quality and reliable use. Structure and working principle The main structure is composed of oven, fan, air duct and hot blast stove. The oven is made of angle steel and steel plate, and there are five layers of louver drying plates in the oven. The drying board is made of punching plate, and the five-layer drying board has an area of 3 square meters, 5 square meters and 7 square meters. The drying board can be turned into horizontal and vertical positions and operated by a handle installed outside the box. The oven is connected with the hot blast stove of the fan by an air duct, and the hot air generated by the hot blast stove is sent into the oven to dry the tea on the drying plate. The hot-blast stove is made of metal, and the fan blows or sucks cold air into the stove, which exchanges heat with flue gas in different layers to form dry hot air for tea drying. Hot blast stoves generally use coal or firewood as fuel, but also diesel oil and liquefied gas as fuel.