How to distinguish the mechanism of charcoal is good or bad?
Calorific value, the amount of energy released per kilogram of charcoal under certain conditions. The calorific value of charcoal is directly related to carbonization temperature and holding time. Under the same carbonization temperature and holding time, the calorific value of different raw materials is different. Generally speaking, the carbonization temperature is high, the holding time is long, its carbon content is also big, sends the heat naturally also high. When the carbonization temperature is less than 450 DEG C, the wood charcoal and the waste heat from the corner of the charcoal heat is usually between 6500 ~ 7 million card /kg, straw and rice husk carbon calorific value is generally about 6 million card /kg. When the carbonization temperature is greater than 600 DEG C, the heating capacity of the carbon produced by the material can be increased by a factor of 500 to 1 million.
2 volatile matter content, depending on the carbonization temperature. According to different uses, we can burn low, medium temperature carbon, also can burn high temperature carbon. In the high temperature calcination release of CO, CO2, H2, CH4 and other volatile gaseous carbohydrate, its content is generally 12 to 20%. High temperature carbon released by the above volatile less, its content is generally less than 5%.
The ash content of charcoal will vary with the carbonization process and temperature. But wood or scrap, they are not carbon ash differences, generally speaking, in the same conditions, the broad-leaved forest burning charcoal than coniferous forest, a large proportion of the raw bark burn the charcoal ash as well. The usual charcoal ash in 1 ~ 4%.
Professional perspective:1 the mechanism of charcoal ash, with the carbonization process and temperature vary, the charcoal is ash after burning all the white or pink material remaining after that, we often say the gray. Its size directly affects the use of charcoal and economic value. For example, straw, rice husk and other substances contained in the ash is large, and the combustion is not easy to fall off, resulting in low temperature combustion, which is not suitable for people's lives and industrial carbon. Of course, the ash is expected to be smaller, the better, in order to expand its use.
