Pellet plant from 3 t/h and above

A pellet plant produces fuel pellets from wood waste such as sawdust and shavings. We offer complete sets of plants of different design capacities. The production of pellets can become a profitable business, since they are a cheaper and more efficient source of energy compared to other types of fuel, more environmentally friendly than the use of petroleum products and coal.

The plant is fully automated, equipped with all the necessary equipment depending on the buyer’s needs, type of raw materials, power, required parameters of the final product.

Appointment of the plant

The complete plant is designed for the production of pellets – fuel wood pellets made of coniferous wood, cylindrical in shape. Production capacity is 3t/hour.

Raw materials

The following types of raw materials are usually used for the production of fuel pellets:

• Wood waste: sawdust, shavings, wood chips (up to 20 mm in fiber), softwood.
• Composition of raw materials: coniferous species - 90%, deciduous species 10%, incl. - pine – 60%; - spruce – 30%; - deciduous – 10% (possibility of increasing to 30-40%). The content of these wood species can vary in the range of ± 10-15%.
• Plant waste - such as straw, corn husks, sunflower husks and other plant materials.
• Peat, sugar cane, coconut flakes.
• Agricultural by-products.

Products

Fuel granules - pellets. They are used as an alternative to traditional fuels such as coal, oil and gas.

Main parameters of pellets:

1. Pellet diameter: Typically the pellet diameter is between 6 and 8mm, but may vary depending on the type of pellet and the equipment used to produce it.
2. Length of granules: The length of granules can also vary, but usually ranges from 5 to 30 mm.
3. Moisture content of granules: The moisture content of granules should be low to avoid problems with storage and transportation. Typically the moisture content of the granules does not exceed 10%.
4. Ash content of granules: The ash content of granules depends on the type of raw materials used and can vary from 0.5% to 5%.
5. Calorific value of granules: The calorific value of granules depends on the type of raw material used and is usually around 15-18 MJ/kg.
6. Density of granules: The density of granules can vary depending on the type of raw material used, but is usually around 500-700 kg/m3.
7. Color of granules: The color of granules may depend on the type of raw material used and may be different for each type of granule.

Technology

WOOD GRANULATION technology includes several sections:

• Section for receiving and preparing wet raw materials;
• Section for crushing and storing raw material before drying;
• Raw material drying section;
• Dry material grinding section;
• Granulation, cooling and sifting section;
• Big bag packaging section;
• Packaging section in 15 kg bags with robotic stacking of bags on pallets;
• System for detecting and extinguishing sparks and extinguishing fires inside equipment.

The automated production line is equipped with complete, high-performance equipment, which includes crushing and drying plants, presses, lifting and transport systems, storage tanks with dosing elements, mixers, feeders, pumps and other equipment.

The plant operates around the clock, year-round, two-shift operation, the duration of one shift is 12 hours.

Wood pelletizing technology is a complex process that requires special equipment and knowledge in the field of woodworking.

Technology system

Section No. 1 - Section for the preparation, transportation and storage of wet raw materials

• The crushed raw materials (chips and sawdust) enter the floor storage warehouse for raw materials 1.
• It is fed to disk separator 2, which separates large impurities from quality chips and sawdust. Large impurities end up in the operational waste container (not shown in the diagram).
• By conveyor 4, raw materials can be supplied either directly to the grinding container, or in the case of sawdust supplied, bypassing the crusher, to be fed into a belt dryer.
• The crushed and purified raw materials are fed by a conveyor into an operational container with a turner 9.
• From the container, the feeder feeds the raw material to the separator to remove metal impurities and stones. A separate container (tray) is provided for waste.
• Hammer crusher 6 crushes wood chips and feeds it to a container with agitator 9. The crusher has the ability to change the direction of rotation of the rotor.

Section No. 2 - section for drying wet raw materials

• The crushed fuel goes to the floor storage warehouse. Movement of fuel for the drying complex: crushed wood chips are supplied to the floor storage warehouse for raw materials 11.
• After the disk separator 12, then onto the conveyor 13 and by a hydraulic pusher into the working area of the heat generator 14 for combustion.
• The heating agent (heated air) is supplied to the moving belt of the drying complex. As it moves along the belt, the sawdust heats up and loses moisture.
• The dried crushed raw materials are moved through the cyclones of the drying complex to the screw conveyor 21

Section No. 3 - section for grinding dry raw materials and storing

• The dried crushed raw materials are moved through the cyclones of the drying complex to the reversible screw conveyor 21, then the product can be supplied either to the conveyor 22 (emergency - used for emergency disposal of sawdust), or to a separator for cleaning sawdust from metal impurities and stones 23. A separate container is provided for waste (tray ).
• Hammer crusher 24 crushes sawdust and delivers it to conveyor 28 through pneumatic transport.
• Next, the sawdust goes to warehouse conveyor 30 with a volume of 40 cubic meters. and to a conveyor 31 on which a starch input module is installed, which provides starch input to improve the bonding of hardwood granules.
• The workshop is equipped with an air filtration (aspiration) system and is represented by a bag module that ensures the removal of dusty air and its cleaning.

Section No. 4 - granulation section

• The raw materials enter the above-granulator hopper 33 to the feeder and mixer of the granulator; the granulator is equipped with an automated lubrication system.
• The granule is fed to conveyor 36 and into the elevator, and then to cooler 38 equipped with an aspiration system.
• After cooling the granule and reaching a temperature of no more than 15 s from the ambient temperature, the granule is sent for sifting into a sifter, then to elevator 42 and to loading big bag packaging 45.

Section No. 5 - section for operational storage, shipment and packaging

• From elevator 42, through a changeover valve, the granules can be fed to a machine for packing into 15 kg bags 46. The bags are stacked mechanically on a pallet and packed with stretch film using a pellet wrapper.
• The line is equipped with fire extinguishing and spark extinguishing systems according to specifications.

Section No. 6 - section of automation and control of the entire production process

Main technological characteristics

Plant configuration option 3 tons/hour and above.

Technological stages of production

1. Reception and preparation of raw materials. In the process of preparing raw materials, they are cleaned from foreign impurities, crushed and dried.
2. Mixing and granulating. At this stage, the crushed raw materials are mixed with a binder and the resulting mixture is pressed into granules.
3. Mixing and granulating. At this stage, the crushed raw materials are mixed with a binder and the resulting mixture is pressed into granules.
4. Cooling and packaging. After drying, the granules are cooled and packaged in special bags for further transportation.
5. Storage, packaging and transportation. Finished pellets are stored in a warehouse or transported to the place of use.

Composition of the production line (LINE EQUIPMENT - main equipment)

1. Stoker warehouse -2.
2. Disc separator.
3. The separator is magnetic.
4. Hammer crusher -2.
5. Aspiration system.
6. Dryer drum.
7. Heat generator.
8. Press granulator.
9. Counterflow cooler.
10. Buffer storage.
11. Transport equipment.
12. Pneumatic transport.
13. Smoke exhauster.
14. Air separator.
15. Filtration installation.
16. Packing machine.
17. ACS.
18. Spark extinguishing system.

The completeness and characteristics of the plant equipment depend on the feedstock and design capacity.

Benefits of technology

• Compactness compared to competitive solutions;
• Technical solutions allow taking into account individual production characteristics;
• Closed cycle technology is waste-free, only non-combustible impurities are removed;
• Wet and green wood can be processed;
• Obtaining homogeneous, easy-to-use fuel;
• High process automation;
• Energy saving, high efficiency;
• Safety of equipment operation;
• Reducing carbon dioxide emissions into the atmosphere;
• The technological equipment is made of steel that is resistant to corrosion, for example, to the effects of tannic acid, which is released when wood is heated.

We propose to make a layout solution taking into account:

• feedstock;
• productivity;
• room area;
• requirements for the parameters of the final product.

Contact us

We provide comprehensive engineering: design preparation, supply, supervision/installation, commissioning, engineering services, service, warranty and post-warranty service. Our qualified specialists are always ready to work with you to create a solution that meets specific requirements and processes, implement the layout of the line, discuss the technological features of the equipment and clarify prices.

For all questions: purchases, cooperation and for additional information, please contact the contact phone numbers, use the feedback form or send a request by email.