Process of making charcoal briquettes in Vietnam Charcoal

process of making charcoal briquettes
In Vietnam, the charcoal industry plays a significant role in the country’s economy. It is estimated that Vietnam produces about 3 million tons of charcoal annually, making it one of the top producers of charcoal in the world.

In Vietnam, the charcoal industry plays a significant role in the country’s economy. It is estimated that Vietnam produces about 3 million tons of charcoal annually, making it one of the top producers of charcoal in the world. The industry employs many people, particularly in rural areas, and provides a source of income for many households. Charcoal is mainly used for cooking and heating, particularly in rural areas where access to electricity and other forms of fuel may be limited. Additionally, the industry has helped to reduce deforestation as charcoal is produced from waste materials rather than cutting down trees.

Sourcing Ingredients for charcoal briquettes

In Vietnam, various types of wood are used to make charcoal briquettes. These include acacia, eucalyptus, rubber, and coffee wood. The type of wood used depends on the availability and cost of the raw material.

To prepare the wood for making charcoal briquettes, it is first cut into small pieces or chips using a wood chipper or a saw. The wood is then dried to reduce its moisture content to 10-15%. This is important as it ensures that the charcoal produced will be high quality and burn efficiently.

After drying, the wood chips are carbonized using a kiln or retort. This involves heating the wood in the absence of oxygen to a temperature of around 300-400°C, causing it to break down and release volatile compounds. The resulting product is charcoal, which is then crushed into small pieces and mixed with a binder before being compressed into briquettes using a briquette machine.

How to Create Charcoal Briquettes 2 4

In addition to wood, other agricultural waste materials, such as rice husks, sawdust, and coconut shells, can also be used as raw materials for making charcoal briquettes. These materials are first crushed and dried before carbonized and processed similarly to wood.

Điều đáng chú ý là đã có mối quan tâm ngày càng tăng về tính bền vững của việc sử dụng gỗ làm nguyên liệu thô để sản xuất than củi trong những năm gần đây. Điều này là do nạn phá rừng có thể dẫn đến xói mòn đất, mất đa dạng sinh học và tăng lượng khí thải nhà kính. Để giải quyết vấn đề này, một số nhà sản xuất đã bắt đầu sử dụng các vật liệu phế thải, chẳng hạn như mùn cưa và trấu, để thay thế gỗ. Điều này không chỉ làm giảm tác động môi trường.

In addition to sourcing raw materials sustainably, it is also important to ensure that the wood is of high quality and free from contaminants. This can be achieved through proper wood selection and processing techniques and monitoring and testing of the finished product to ensure it meets quality standards. Manufacturers can produce charcoal briquettes that burn efficiently and produce minimal smoke and harmful emissions by using high-quality raw materials and production techniques.

Process of making charcoal briquettes

The process of making charcoal briquettes typically involves the following steps:

  • Step 1: Carbonization

The carbonization process is a critical step in the production of charcoal briquettes. It involves heating the raw material, such as wood or agricultural waste, without oxygen to remove volatile compounds and create a stable form of carbon. This process is essential as it removes impurities and moisture from the raw material, creating a product that burns more efficiently and produces less smoke and harmful emissions.

In Vietnam, traditional carbonization methods involve using kilns or retorts made from clay, brick, or metal. These kilns are loaded with the raw material and then heated to a high temperature, usually between 300-400°C. The kilns are sealed to prevent the entry of air, which would cause combustion rather than carbonization. The process can take several days to complete, and the resulting charcoal is then removed from the kiln and allowed to cool.

However, these traditional methods have some drawbacks. They are often inefficient, producing a lot of smoke and greenhouse gas emissions, and can lead to deforestation as trees are cut down to fuel the kilns. Additionally, traditional kilns require much manual labor and are unsuitable for large-scale production.

To address these issues, modern carbonization techniques have been developed. These methods use more efficient, closed systems that capture and utilize the volatile compounds released during carbonization to reduce emissions and improve efficiency. Examples of modern carbonization techniques include rotary kilns, gasifiers, and pyrolysis reactors. These methods use heat sources such as electricity, gas, or biomass to generate the heat needed for carbonization. They are also designed to be more automated, requiring less manual labor and increasing production capacity.

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  • Step 2: Crushing 

 The charcoal is then crushed into small pieces or powder. This is done to increase the surface area of the charcoal, making it easier to mix with the binder in the next step.

  • Step 3: Mixing and Binder Addition 

The crushed charcoal is mixed with a binder, such as starch or clay, to help hold the briquette together. Other additives, such as sawdust or water, may also be added at this stage to improve the quality of the briquette.

  • Step 4: Briquetting 

The mixture is then fed into a briquette machine, compressing it into briquettes of a desired shape and size. The briquettes are typically oval or pillow-shaped, with around 50-80mm diameter.

  • Step 5: Drying 

 The briquettes are then dried in the sun or a drying chamber to reduce their moisture content. This is an important step, as briquettes with high moisture content will not burn efficiently and may produce excessive smoke.

After drying, the charcoal briquettes are ready for packaging and distribution. The entire process can take several days to complete, depending on the size of the operation and the drying conditions.

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Quality Control

Quality control measures are critical in the production of charcoal briquettes in Vietnam to ensure that the finished products meet the required quality standards. Some of the quality control measures used in the charcoal industry in Vietnam include:

  • Raw material selection: High-quality raw materials are crucial in producing good charcoal briquettes. Raw materials are selected based on their quality and consistency.
  • Carbonization process control: Temperature and duration of the carbonization process are essential factors that affect the quality of charcoal. Therefore, the temperature and duration of the carbonization process are closely monitored and controlled to ensure that the charcoal produced meets the desired quality standards.
  • Binder selection and mixing control: The binder used in producing charcoal briquettes plays a vital role in determining the quality of the finished product. Therefore, the type and quantity of binder used are carefully controlled to ensure that the resulting briquettes have the desired properties.
  • Briquette quality control: Finished briquettes are inspected to ensure they have the desired shape, size, and density. Briquettes that do not meet the required standards are removed and discarded.
  • Laboratory testing of finished products: Finished briquettes undergo laboratory testing to determine their quality. Various tests, such as calorific value, ash content, and moisture content, are conducted to ensure that the briquettes meet the required quality standards.
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Conclusion

The charcoal briquette industry in Vietnam will likely continue to grow as demand for clean energy sources increases globally. There may also be a shift towards more sustainable production methods, such as using waste materials as raw materials or implementing more efficient carbonization processes. Overall, the charcoal briquette industry in Vietnam has a bright future and is expected to continue to play a significant role in the country’s economy.

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