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Coal Dust Briquetting Machine

coal dust briquetting machine has high quality, high output and simple equipment operation.

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Features

Products Description

There are many raw materials for carbonization, such as firewood, forest felling residues, miscellaneous wood removed during forest tending, and residues from wood processing plants, such as sawdust, etc., which can all be carbonized. Except for sawdust, which is granular and needs to be carbonized in a special carbonization furnace, other raw materials are mostly wood segments, which are suitable for the requirements of most carbonization furnaces or charcoal kilns.
The carbonization of wood materials such as wood, sawdust, tree roots, fruit cores and fruit shells is to heat them in the carbonization equipment and perform thermal decomposition. During the pyrolysis process, a series of complex chemical reactions occur, producing many new products. According to the characteristics of the temperature change of the thermal decomposition process and the situation of the generated products, the carbonization process can be roughly divided into the following four stages.

Product Parameters

Model	Capacity	Roating speed	Power	Model size
MK-140	2-3(t/h)	46-60(r/min)	11KW	30-40mm
MK-180	3-4(t/h)	38-50(r/min)	22KW	30-60mm
MK-210	4-5(t/h)	30-40(r/min)	30-37KW	30-80mm
MK-300	6-8(t/h)	40-50(r/min)	40-50KW	30-100mm

Product Analysis

1 Drying stage
The temperature in this stage is 20-150 degrees Celsius, and the pyrolysis rate is very slow. The water contained in the wood is evaporated by the heat supplied from the outside, and the chemical composition of the wood material has hardly changed.
2. Pre-carbonization stage
The temperature in this stage is 50-275 degrees Celsius. The thermal decomposition reaction of the wood material is more obvious, and the chemical composition of the wood material begins to change. The unstable components, such as hemicellulose, decompose to produce carbon dioxide, carbon monoxide and a small amount of acetic acid.
The above two stages require external heat to ensure the rise of the pyrolysis temperature, so they are also called endothermic decomposition stages.

3. Carbonization stage
The temperature in this stage is 75-400 degrees Celsius. In this stage, the wood material undergoes rapid thermal decomposition and generates a large number of decomposition products. The generated liquid products contain a large amount of acetic acid, methanol and wood tar, and the carbon dioxide content in the generated gas products gradually decreases, while the flammable gases such as methane and ethylene gradually increase. This stage releases a large amount of reaction heat, so it is also called the exothermic reaction stage.
4. Calcination stage
The temperature rises to 450-500 degrees Celsius. In this stage, the charcoal is calcined by external heat supply, the volatile substances remaining in the charcoal are discharged, and the fixed carbon content of the charcoal is increased. At this time, very few liquid products are generated.
It should be pointed out that in fact, the boundaries of these four stages are difficult to clearly divide. Since the heat received by various parts of the carbonization equipment is different and the thermal conductivity of the wood material is relatively small, the position of the wood material in the equipment is different, and even the inside and outside of a large piece of wood may be in different pyrolysis stages.