Beer bottles can be used as insulation layer, which can slow down the loss of heat and achieve the effect of insulation. Not only can the residual temperature of the kiln wall be used to bake bread better, but also the waste resources can be fully utilized.

The structure of bread kiln mainly has three layers, namely, thermal insulation layer, thermal insulation layer and structural layer. The thermal layer is mainly clay and sand with a ratio of 3:7. The insulation layer is made of discarded beer bottles, sawdust and soil. The structural layer adopts straw soil, that is, long straw, clay and sand.

A bread kiln is a small house made of clay. After the firewood is completely burned, the waste heat of the kiln wall can be used to store heat for food. The method of building a bread kiln is simple. Everyone can do it by himself. Compared with brick kilns and earth kilns, this bread kiln has better thermal insulation effect, lower cost and more natural beauty.

Precautions:

When making a kiln, we should grasp a principle, that is, we should use the heating heat to heat the food, instead of baking the food while adding firewood. In this way, toxic substances that are not completely burned may enter food, which may cause cancer.

Don't open the kiln mouth too low, which may cause incomplete combustion. In fact, when the height of kiln mouth is about 63% of the height of inner chamber, the thermal cycle efficiency is the best.