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Complete Sawdust Pellet Production Line Solution

We set up the Complete Sawdust Pellet Production Line Solution that will produce pellets with the world standard technologies!


Raw Material

  • Pre-treatment
    Section

  • Crushing
    Section

  • Conveying
    Section

  • Drying
    Section

  • Pellet Mill

  • Cooling
    Section

  • Screening
    Section

  • Packaging
    Section

  • Dust Control
    System

Finished Product

Pre-treatment : This section is more suitable for the larger raw materials in the early stage, and it is not easy to directly crush or granulate through the crusher. But sometimes this section can be omitted. For example, the sawdust pellet production line can directly pelletize, and this section is not needed.

Crushing Section : This section is usually used in biomass pellet production line, forage gress pellet production line and nutshell straw pellet production line. For example, the SFSP hammer mill is used for wood and fruit shells, and the straw/alfalfa/husk/grass crusher is used for grass and straw. Different raw materials are equipped with different types of crusher.

Conveying Section : Conveying equipment is mechanical equipment that transports bulk cargo and unit goods from a loading point to an unloading point along a certain route in a continuous manner. The conveying equipment of RICHI machinery includes screw conveyor, scraper conveyor, belt conveyor and Bucket elevator.

Drying Section : To dry materials and remove the moisture from 50% to 15-17%. Itincludes: --Burningstove,tosupplyhotair --Drumdryer --Dischargingcyclone.

Pellet Mill: Wood pellet machine, also known as biomass pellet machine, has a wide range of raw materials: straw shells include wood, straw, sawdust, cotton stalks, rice husks, peanut shells, sunflower shells, coconut shells, coffee shells, bamboo, etc. . The grasses are alfalfa, hops, hemp, hay, grass, etc. In addition, there are organic fertilizer granulator, cat litter granulator and so on.

Cooling & Section : Pellets come out from pellet machine, its temperature is around 70℃, by cooling system, It can cool down to room temperature immediately. By momentary cooling, the hardness of pellets will become more stronger.

Screening Section : The forming rate of pellet machine is around 98 % , so there are still have 2% powder in pellets,by screening, sort out all the powders from pellets.

Packaging Section : There are three kinds of automatic packaging machines produced by RICHI machinery: powder packaging machines, granule packaging machines and (universal) dual-purpose packaging machines.

Dust Control System : A dust collection system is an air quality improvement system used in industrial production to improve breathable air quality and safety by removing particulate matter from the air and environment. Dust collection systems work on the basic formula of capture, convey and collect.

Production Line Description

Sawdust

Sawdust pellets or wood pellets have been recognized as a new energy source in the global market, especially in South America, Europe. With the growing concern about air pollution and carbon emission, more about more countries begin to advocate and support the development of wood pellet industry. Now, sawdust pellets have been widely used in power station for commercial use, and pellet stove / fireplace / boiler for home heating.

How to Make Sawdust Pellets

sawdust pellet production line flowchart
sawdust pellet production line flowchart

1. Screening

Before pelleting, sawdust has to be sent to the sieving machine for screening. Large pieces of wood, logs, branches, barks and other impurities will be screened out during this process.

2. Crushing

Hammer mill can be adopted at this time to crush the screened raw materials into small particle sizes.

3. Drying

Sawdust with high moisture content is not suitable for pelleting, so rotary drum dryer is necessary to dry sawdust through hot air.

4. Pelletizing

Sawdust pellet mill is necessary equipment in sawdust pellets production line. During this process, under high pressure sawdust is pressed into holes of pellet die, as sawdust pellets to be pushed out, they are cut off to ensure its length.

5. Cooling and Bagging

When pushed out of the pellet mill, pellets temperature is around 80~90 ℃. Pellets are also very loose and easy to be broken. With the cooling equipment, pellets will be cooled to room temperature and become hard and durable. Bagging equipment can automatically pack pellets into bags.

Sawdust is pressed into pellets by a pellet machine
Sawdust is pressed into pellets by a pellet machine

Advantages of Sawdust Pellets

* Efficient. Sawdust pellets are one efficient biomass fuel for its low moisture and ash content.

* Convenient. After pelleting, sawdust pellets are in uniform size and can be packed in bags, which makes pellets easy to be store and transport.

* Cost-effective. Compared with other home fossil fuels, sawdust pellets are economically competitive, moreover the prices are less volatile.

* Renewable. Sawdust pellet is made of residues of woods or other forest by-products, so it is an unlimited fuel sources. Besides, it can be locally made and providing jobs.

* Environmental friendly. Being one sustainable fuel source, sawdust pellets is carbon neutral.

Chemical Composition of Sawdust

Chemical composition of sawdust mainly consists of cellulose, hemicellulose, lignin, etc. Below is the sawdust chemical properties of pine, spruce, birch and aspen.

Sawdust Materials Cellulose Hemicellulose Lignin
Aspen   40 30  19<
Birch 41 32 22
Spruce 42 28 27
Pine 40 28 28

Specification of Sawdust Pellets

Moisture <12% Ashcontent <0.5%
Diameter 6-10 mm Length ≤5*diameter
Volatilematerial 68% Sulphur <0.05%
Nitrogen ≤0.3% Chlorine ≤0.03%
Netcalorificvalue 19MJ/kg Bulkdensity 650kg/m3

Application of Sawdust Pellets

1.Home cooking and heating. Sawdust has high combustion with low ash content, so it is suitable for home cooking and heating.

2.Biomass boiler. Being one common biomass material to be used in biomass boiler, sawdust pellet is similar to EFB pellet, the difference between them is the feedstock.

3.Household BBQ rack. Regarding of renewable and environmental protection, catering industry and domestic BBQ like to take sawdust pellets as fuel replacement. Besides compared with charcoal, sawdust pellets makes BBQ much cheaper.

4.Power plant. Along with the international demand to reduce CO2 carbon dioxide emissions, biomass pellets is becoming a more and more popular fuel to generate power.

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