Wood pellets are projected to have a bright future because their needs are increasing all the time. The need for environmental programs to overcome climate change and global warming with carbon neutral fuels such as wood pellets is increasing. The use of wood pellets is mainly for power plants, both with cofiring and 100% (fulfiring) using wood pellets. 60% of the power plants in the world are coal power plants which are positive carbon fuels, thus increasing the concentration of greenhouse gases (CO2) in the atmosphere, so that CO2 emissions need to be reduced. The need for wood pellets with a large volume with an average of 10 thousand tons per export shipment and continuous means that not many can play for the production of wood pellets, because of the large raw materials needed, the large plant capacity, big investment and so on.
Screw and mechanical press type briquette
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| Hydraulic type briquette |
Wood briquette is an attractive alternative for the utilization of wood wastes with a limited volume, a smaller plant capacity and so on. Wood briquette users are also different from wood pellets. Wood briquette is used mainly for heating stoves during winter in 4 seasons countries or for fueling industrial boilers. Apart from that, technology and products are also more varied than wood pellets. The briquette machine is simpler and easier to operate. The briquette machine can also handle a wider variety of raw materials, larger particle sizes, higher ash content and lower production costs. Wood Briquette technology can be grouped into 3 as follows:
Mechanical Press Briquette Machine
1. Mechanical Press
The mechanical briquette press is made like an eccentric press, and has a very simple design. The continuously rotating eccentric, connected to the piston, presses the raw material through a conical die system, where the briquettes are being formed. The large flywheel ensures extremely quiet and balanced operation. The press operates at 270 strokes per minute. The briquettes are cooled and hardened in one cooling line, which also functions as a briquette conveyor. The briquetting press is fully automatic, providing smooth operation with minimal maintenance and service. The rugged design ensures long service life and the briquetting press can operate up to 7,000 to 8,000 hours per year (583 - 667 hours per month or 20 - 22 hours per day).
The main advantage of the mechanical briquette machine is that the press can be used both for the production of briquettes for household use (consumer briquette) and also for industrial briquettes for boilers (industrial briquette). Industrial briquettes can be made as short pieces, or at random lengths or cut to a specified length. Other advantages are high capacity, low production cost, and adjustable density.
In a hydraulic press, the raw material is pressed into the compression chamber at a certain rate. Inside the chamber, an appropriate amount of material is compressed or pressed with a piston. The main piston transfers the raw material into the mold forming briquettes to the required final condition and density.
The hydraulic press compression process is relatively slow. The compression cycle can be between six and 25 cycles per minute, depending on the amount loaded or the density of the briquettes. Hydraulic briquette machines are usually small in size, with capacities ranging from 50 kg / hr to 200 kg / hr. Round briquettes, with a diameter of 50 mm to 75 mm. However, at present, hydraulic briquettes can be made mainly in rectangular shapes with a capacity of up to 1.5 tons per hour. The traditional size is 150 x 60 mm, but larger briquettes can also be made.
In the extruder press, the raw material is fed into the chamber with a screw feed. The raw material is screwed into a cone mold and an extension mold. The compression screw is conical. The screw operates at approximately 800 revolutions per minute, and during this process high heat - up to 300 degrees Celsius - is generated in a combination of friction and molding system heating. This briquette output has a hole in the middle and can be carbonized so that it becomes a product known as sawdust charcoal briquette.
For those who are interested in producing the wood briquette, we can help provide the machine and help with the marketing of the briquette products or please send an email to eko.sbs@gmail.com
