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Types and methods of wood drying

Wood can have various degrees of humidity. This is due to the fact that it has the ability to absorb water vapor from the air. This property of wood is called hygroscopicity. Drying of wood allows to protect the wood from fungus and biological damage. Furthermore, it is necessary in order to optimize the process of charcoal and Pini-Kay production.

The use of charcoal as a fertilizer

The positive effect from the use of charcoal as a fertilizer for growing crops is known for a long time. The unique properties of charcoal are varied and their complex impact on improving soil fertility cann’t be assessed.  At the end of the twentieth century, the attention of soil scientists was attracted by the pieces of the incredibly fertile land in Peru, which the Indians called "Terra Preta".

Interesting facts about charcoal

All people from time immemorial were known for the rich potential of charcoal. A lot of legends and stories associated with charcoal. Approximately 6,000 years ago, charcoal was the main fuel for remelting of copper. He was in great demand all over the world. Charcoal has become very popular thanks to the huge forests of America. Such famous people as Henry Ford, Stafford Orin made a huge contribution to methods of charcoal production. 

Modern equipment for charcoal production

Today, there are several types of equipment designed for the charcoal production using the method of wood pyrolysis – thermal decomposition of wood without oxygen. Some machines were popular previously, but currently they are not used. Others continue to work.

Primary products of wood pyrolysis

Gaseous, liquid and solid products of wood pyrolysis consist of three main elements: carbon, hydrogen and oxygen. They may also contain a small amount of nitrogen-containing substances.

Indicators of charcoal quality

Good charcoal should be strong shiny black material, have few radial cracks and make a ringing sound, when one taps on it. Also it should be easy to burn and burn without odor and smoke. The wood structure is preserved in high-quality charcoal. Annual layers should be clearly visible in the ends of the pieces of charcoal, especially in coniferous charcoal.

Video presentation: The charcoal of the future

We offer to Your attention a video presentation "The charcoal of the future". You will get acquainted with the description of the Pini-kay briquettes, their use as well as their advantages in comparison with the ordinary firewood.

Comparative analysis of aerodynamic and rotary dryers

Analysis of production experience allows to highlight the most widespread shortcomings of rotary and aerodynamic dryers. Aerodynamic dryer has a limited range of moisture for drying, 30% as a rule. The tension of forced heating agent isn’t enough to lift wet particles. It means that wet sawdust lays in various parts of the dryer.  

Liquid products of pyrolysis

The wood pyrolysis is a decomposition of the wood during the process of heating to a temperature of about 450 °C without oxygen. The result of the processing of wood is the formation of three types of products: solid, gaseous and liquid products.

Stabilization of charcoal

Charcoal has paramagnetic properties due to the presence of stabilizing macro radicals (paramagnetic centers – PMC). Hot charcoal unloaded from the charcoal kiln absorbs oxygen from the air, at the same time it heats up even more, which can lead to spontaneous combustion. 

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