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Straw pellet machine

Straw generally refers to the stem, leaves and fringe of mature crop, including wheat straw, rice straw, maize straw, cotton straw, etc. They are abundant in harvest seasons, making up about half the yield of crops.

Straw contains nitrogen, phosphorus, potassium, calcium and other organic substance. The crude fibers take up 30%-40%. It is an important raw materials for making paper, biofuel, animal fodder and horse bedding.

Leaving straw on fields can cause the emission of green house gas like methane. Burning them directly to generate heat is a waste of resources and harmful to environment. Nowadays, with the increasing cost of fossil fuel and the maturity of biomass application, more and more people choose to make straw pellets to improve added value.

crop straw
wheat straw
wheat straw pellets

Make straw into biomass pellets

The main composition of straw are cellulose, hemicellulose and lignin, which contains a large quantity of biomass energy. The following chart shows the properties of 3 major crop straws.

Straw terials Cellulose Hemicellulose Lignin
Wheat straw 41.53% 22.92% 12.26%
Rice straw 39.2% 23.5% 36.1
Corn straw 61.2% 19.3% 6.9%

Straw features high calorific value and low moisture content, so it has always been used as fuel. When we make it into pellets, the calorific value go up to 18-19 MJ/kg, the ash content is under 3%, the moisture content under 10%. The ash from straw pellets combustion can facilitate plant growth as mineral fertilizer.

Materials Moisture content Ash content Calorific value
Rice straw 15-30% 15-20% 13.98 MJ/kg
Wheat straw 20-40% 8-9% 14.4 MJ/kg
Corn straw 20-27% 8% 15.68 MJ/kg
Straw pellets 8-10% 3% 18-19 MJ/kg

Burning biomass pellets means giving back the carbon that plant absorbed during growth, so there is no additional carbon to the natural world. Namely, the net influence it exerts on natural carbon recycle is 0.

Making straw pellets can increase their density so that they are easy to store and transport. They are burned in biomass boiler as an excellent substitute for fossil fuel. Besides, it has wider applications like horse bedding, pet bedding and animal feed.

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Straw pellet making machine

Straw pellet making machine is used to process bulky rice straw into biomass pellets. TICO developed a series of pellet machine according to the characteristics of crop straw. It is small and portable with high efficiency and affordable cost, suitable for farmers who intend to make profit from agriculture waste.

We provide straw pellet making machine driven by electricity, diesel, gasoline, and PTO. Diesel engine type is more suitable for outdoor work where you have no access to power supply. PTO type works by connected with a tractor, so it is more cost-efficient for users who already have such machinery.

Die-turned pellet making machine

Drive Mode MODEL POWER CAPACITY (kg/h) WEIGHT (nw/gw)
Electric motor pellet mill
Electric motor
ZLSP-D 150B 5.5kW 50-100 95/110
ZLSP-D 200B 7.5 kW 80-120 200/230
ZLSP-D 230B 11 kW 120-200 290/320
ZLSP-D 260B 15 kW 160-250 320/360
ZLSP-D 300B 22 kW 250-400 350/380
diesel engine pellet mill
Diesel engine
ZLSP-D 150A 8HP 50-100 180/220
ZLSP-D 200A 15 HP 80-120 210/240
ZLSP-D 230A 22 HP 120-200 280/310
ZLSP-D 260A 30 HP 160-250 330/360
ZLSP-D 300A 41 HP 250-400 410-450
PTO pellet mill
ZLSP-D 150P ≥8 HP 50-100 90-110
ZLSP-D 200P ≥15 HP 80-120 130/150
ZLSP-D 230P ≥22 HP 120-200 175/200
ZLSP-D 260P ≥33 HP 160-250 235/255
ZLSP-D 300P ≥41 HP 250-400 305/325

Roller-turned pellet making machine

Drive Model MODEL POWER CAPACITY (kg/h) WEIGHT (nw/gw)
electric motor pellet mills
Electric motor
ZLSP-R 200B 7.5kW 80-120 215/245
ZLSP-R 300B 22 kW 250-350 540/575
ZLSP-R 400B 30 kW 350-450 770/810
ZLSP-R 420B 37 kW 400-600 700/1100/1200
ZLSP-R 550B 55 kW 500-800 1770
diesel engine pellet mills
Diesel engine
ZLSP-R 200A 15HP 80-120 320/350
ZLSP-R 300A 41 HP 250-350 850/890
ZLSP-R 400A 55 HP 350-450 1010/1050

Notes on making straw pellets

straw pellets production process
  • Crop straws need pretreating before making pellets. The moisture content should be around 15%, or it may affect the pellets’ quality and forming rate. The size should be smaller than the diameter of holes on flat die, usually 4-5mm, or they would block the holes and cause damage to the pellet machine. Besides, there are usually some impurities and foreign matters in straw materials that you must remove.
  • For pre-treatment, you need a hammer mill to crush large straw materials into small size, and a dryer to lower the moisture content. But the dryer is optional, for straws can be dried by air.
  • After pre-treatment, you can feed these materials into the pellet machine, sometimes with the help of a conveyor. The straw pellets produced by our machine present high density and hardness, with smooth surface and no cracks. They are cylinders whose diameter is 6-8mm, and the length is 4-5 times of the diameter.
  • Straw pellets have high temperature when they are extruded from the pellet machine. You can use a counter flow pellet cooler to cool it down, or leave them in open air for cooling. After that, you can pack them into bags for storage and transport. For large scale production, a packer machine is necessary.
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Take full advantage of your straw !

If you have stable supply of straw, whatever they are wheat straw, rice straw, maize straw, cotton straw, you can take full advantages of them by making straw pellets. For small-scale production and home use, a hammer mill and a pellet making machine is enough. For large-scale production, selling or factory use, you can consider building a straw pellet plant.

TICO has rich experience and professional knowledge on biomass fuel production and pellet machine manufacture. We offer individual pellet machine and auxiliary equipment, as well as complete pellet plant. If you have any interest or question, please feel free to contact us. We can figure out customized solution according to your situation.

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