Vertical Type Carbonization Furnace
Details
Product Description
Carbonization furnace is used for converting all kinds of biomass to high-quality and environmental-friendly charcoal through high temperature, the raw materials like wood branch, wood sawdust, peanut shell, coconut shell, etc. The carbonization furnace adopts the advanced technology to purify and recycle the combustible gases such as carbon monoxide, methane and oxygen generated during carbonizing process, which can solve the problem of pollution caused by smoke generated, and solve the problem of energy required for itself. The carbonization furnace is fully self-sufficient, continuous and economical, fully utilize biomass wastes, convert biomass wastes to valuable energy.
Vertical Type Carbonization Furnace
The applicable raw materials can be wood, wood branch, biomass briquettes and so on (the raw materials with big size).
Applicable production line
Charcoal briquette production line
Working principle
Vertical type carbonization furnace consist of stove, stove cover, inner pot, purifying device, gas recycling device, combustion chamber.
The carbonizing process has three steps:
Drying
From the start of ignition to the temperature rising to 160℃, the moisture of biomass will reduce gradually, with external heating and the heat generated by the combustion itself. The chemical composition of biomass is almost unchanged.
Pre-carbonizing
At this stage, the temperature will rise to 160℃-280℃, through the heat mainly generated by the combustion of biomass itself. At this moment, the biomass undergoes the reaction of thermal decomposition, its chemical composition begins to change. The unstable composition like hemicellulose decomposes and produces CO2, CO and wood vinegar.
Carbonizing
At this stage, the biomass undergoes thermal decomposition heavily, and a lot of liquid products such as wood vinegar, methanol and wood tar are produced at the same time. Besides, combustible gases are produced, like methane and ethylene, these combustion gases burning in stove. Thermal decomposition and gas combustion generate a large amount of heat, which raises the stove temperature. Biomass is dry-distilled to charcoal at high temperature.
Note
- The carbonization process is the key of charcoal briquette production. Carbonization process includes three stages: drying with low temperature, carbonizing with high temperature, cooling.
- The moisture in biomass will seriously affect the efficiency of carbonization. The moisture content of biomass briquettes is 8% roughly, so it is necessary to take some time for drying, to prevent the biomass briquettes from disintegrating, and ensure the efficiency of carbonization.
- When the temperature rises to 300℃, a large amount of combustible gas(methane) will be generated in stove, the combustible gas can be recycled, to be supplied to the stove. The above stage needs to be sealed, oxygen-free and fire closed.
- After the charcoal is released, the charcoal should be ventilated, to prevent carbon dioxide poisoning, the charcoal should be placed outdoors for more than 8 hours.
Advantage of hammer mill
- One stove can be equipped with several inner pots, or conjoined stoves, to ensure continuous production.
- The temperature is controllable and adjustable.
- The combustible gas can be recycled, no air pollution, environmental-friendly and energy-saving.
- By-products can be collected, including wood vinegar and tar, improving profits.
