The Art and Advantages of briquetting - C.F. Nielsen

The art and advantages of briquetting

Biomass is recognized as an efficient and an environmentally friendly alternative to fossil fuels. Densification of biomass is an important element in trading and handling biomass, as densified fuel offers logistical advantages, and becomes a commodity ensuring high energy content and homogenous quality. Within densification, pellets are best known, but briquetting offers many alternative advantages.Traditionally, briquetting technology was established for developing countries to produce briquettes of local residues, for use in household cooking stoves and restaurants. Later, as the capacities of the machines increased,
briquettes were used in industrial boilers to create heat, steam and power for industry and power plants. Within the past 20 years, briquetting has also found its way to households in industrialized countries as consumer logs for wood-burning stoves and fireplaces.

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In recent years, as the focus on renewable energy has grown, the applications for briquettes have grown concurrently, as have different technologies and new applications.

Briquetting Technologies

Briquetting technologies include mechanical briquetting presses and hydraulic briquetting presses; it is important that customers select the best technology for their applications.

Mechanical 

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The mechanical briquetting press is built like an eccentric press, and has a very simple design. A constantly rotating eccentric, connected to a piston, presses the raw material
through a conical die system, where the briquettes are being formed. Large flywheels secure a very quiet and balanced operation. The press operates with 270 strokes per minute. The briquettes are cooled and hardened in a cooling line, which also serves as transportation of the briquettes. The presses work fully automatic, resulting in a smooth operation with very little maintenance and service. The robust design ensures a long life span and the presses can operate up to 7,000 to 8,000 hours per year.

C.F. Nielsen has more than 70 years’ experience with briquetting machines and, over the years, has developed new equipment and increased capacities, so that the range is now
from 200 kilograms per hour (kg/h) up to 5.000 kg/h per machine. The briquettes can be produced in sizes from a diameter of 50 millimeters (mm) to 120 mm, and in square
form from 55 mm by 55 mm to 100 mm by 100 mm. Other shapes can also be produced.

The main advantage of a mechanical briquetting press is that the press can be used both for consumer logs and industrial briquettes for boilers. Industrial briquettes can either be made as short pucks, at random lengths or cut to a defined length. Further advantages are high capacity, low production costs, and multiple densities.

Recent Trends, Projects

Today, briquetting is obtaining renewed attention. A briquetting machine is more simple and easier to operate, which opens new possibilities in new markets such as Africa, Asia and Latin America. Furthermore, briquetting presses can handle a larger range of raw material such larger particles, waste with higher ash content and special raw materials. Some examples of these applications include the following.

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