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1. The working principle of  wet straw biomass pellet processing equipment

The core principle of wet straw pellet processing equipment (such as wood chip pellet machines) is to convert biomass feedstock into high-density pellet fuel through mechanical compression. The basic process involves three steps: feedstock pretreatment (crushing, pulverizing, and drying), mechanical compression, and finished product processing (cooling and packaging). For example, in a ring die pellet machine, a motor is connected to a reducer via a coupling, driving the ring die. The feedstock enters the compression zone under gravity, where compression rollers squeeze the material into the ring die holes. After the pellets are formed in the die, they are cut into pellets of fixed length by a cutter.

2. Characteristics of  wet straw biomass pellet processing equipment

(1) High-efficiency crushing: The combination of high-speed rotating blades and screens can quickly and effectively crush straw into the required fine particles, thereby improving biomass utilization. 

(2) Versatility: Not only suitable for straw, but also can process other biomass materials such as wood chips, peanut shells, rice husks, etc. This versatility makes it widely used in agriculture, energy and environmental protection industries. 

(3) High energy efficiency: Advanced power systems and energy-saving technologies are usually used to improve energy utilization efficiency, reduce energy consumption, and thus save operating costs. 

(4) High crushing uniformity: It can achieve uniform and fine crushing of biomass straw, making it easier to carry out subsequent fermentation, pressing or processing. 

(5) Automatic control: Many biomass straw crusher equipment is equipped with advanced automatic control systems, which can achieve intelligent operation, easy operation, and improve work efficiency. 

(6) Special materials and processes: The main load-bearing components are made of high-alloy wear-resistant materials, and the life of wearing parts is twice that of similar products.

3. Application scenarios of  wet straw biomass pellet processing equipment

Core application areas: Biomass energy production and application

The main product after straw processing is straw biomass pellets (or standard pellets after drying). Its core value lies in becoming a clean and renewable energy source that replaces traditional fossil fuels. Therefore, the energy field is the core application scenario of this equipment, including:

(1) Industrial heating/power generation field

Applicable scenarios: production heat (such as boiler heating, drying process) of small and medium-sized factories (such as food processing, textiles, wood processing, chemicals, etc.), power source of small generator sets.

(2) Civil heating/cooking field

Applicable scenarios: winter heating in areas with rich straw resources, family cooking or heating of small commercial places (such as homestays, bathing centers).

(3) Biomass power generation field

Applicable scenarios: fuel pretreatment link of small and medium-sized biomass power plants (installed capacity 10-30MW).

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TONY Brand 32-40 TPH Wet Straw Line can process wet straw and various biomass materials related to agricultural waste into biomass pellets. Straw processing into biomass pellets has a wide range of uses .As fuel: straw pellet fuel can be used as boiler fuel for power plants, industrial boilers, civil heating and other fields. Its calorific value is similar to coal, but the price is lower, and the combustion process produces fewer pollutants, is a more environmentally friendly fuel. As feed: Straw pellets processed by straw pellet machining can be used as feed for livestock. This method can make full use of crop straw, reduce feed costs, and also help solve the problem of straw disposal. These uses can not only effectively use agricultural waste, reduce environmental pollution, but also create economic benefits and promote sustainable agricultural development.

1. Capacity: 32-40 Ton/Hour

2. Raw materials: Wet straw, including wet corn straw, wet wheat straw, wet cotton straw, wet flax straw, wet beet straw and other agricultural straw

3. Moisture: About 30-35%

4. Application: All kinds of  biomass materials suitable for pellet production.

Suitable customers: Green energy companies, agricultural cooperatives, and small - scale rural processing units that have ready access to wet straw and related agricultural residues.

5. Finished Pellets Markets: Large power plants, domestic heating systems in rural and suburban areas, industrial heating facilities in rural - based industries, combustion heat applications in local manufacturing units, heating systems in rural schools and community centers, boiler rooms in small - scale rural enterprises, and canteens in rural educational institutions.,farms, feed mills.

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1. Project Name: Wet Straw Production Line

2. Raw Material: Bales of  Wet Straw

3. Moisture Content of Raw Material: 30-35%

4. Capacity: 32-40 TPH

5. Process: Grinding Process - Fine Crushing Process - Straw Dust Storage Process-Drying Process-Pelletizing Process - Cooling Process - Packing Process

6. Main Equipment: Straw Cutter -TPX3500-160kw, Effective Hammer Mill- TFD100*200-315kw, TONY Large Hydraulic Storage Silo,Rotary Drum Dryer-2.5*24m ,TONY Pellet Machine-TYJ860-III-280kw, Galvanized Pellets Cooler, Ton Packing Machine and Belt Conveyors

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1.Grinding Process:

A.The process is mainly used to grind wet straw within 3m in diameter into wet straw pieces. The rotary cutting mode of the outer chain of the gear, the rotary cutting rotor blade is sharp, and the blade types are various, which can be rotated to cut various bales of straw with different diameters, different thicknesses, different lengths and different water contents

B.TONY brand straw cutter TPX3500-160kw models *4sets

C.Capacity:8-11Ton/Hour/Set

Main Parts:

(1)Tony's New Straw Cutter

(2)Enlarged Turntable

(3)Rotary Cutting System

(4)Drive system

(5)Electrical Cabinet.

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2.Fine Crushing Process

A. The process is mainly used to crush 60-70mm wet straw pieces into 8-14mm wet straw dust.

B.TONY brand effective hammer mill TFD100*200-315kw *3sets.

C.Capacity: 32-40 tons/hour.

Main parts:

(1)TONY Effective Hammer Mill

(2)Galvanized Dust Collector.

(3)Sawdust Conveying Fan.

(4)Cyclone With Airlock.

(5)Electrical Cabinet.

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3.Straw Dust Storage Process:

A. This process is mainly used to storage the straw dust that comes out of the hammer mill.It is hydraulic galvanized storage silo which is more stable and straw dust in it is not easy to be blocked. 

B.TONY Brand Large Hydraulic Storage Silo to storage the straw dust that comes out of  the hammer mill.This process can be optional by customer.If customer do not chose the storage bin,he can storage the sawdust on the ground directly which may need some labour.                        

Main Parts:                                                                                                                                   

(1)TONY's new Large Hydraulic Storage Silo.

(2)With Screws Inside the Storage Bin to Prevent Straw Dust Blocked.

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4.Drying Process: 

A.This process is mainly used to dry the straw dust from 30-35% to 10-15%.  B.Capacity: 32-40 Ton/Hour. 

C.TONY use 6 sets of 2.5*24m rotary drum dryer for this process,TONY hot stove is made of firebrick pan, shell with H steel plate as the frame.   There are 3 layers of fire blocking device inside, which can effectively prevent the fire from entering the tumble dryer.Customers can choose to use waste wood, biomass pellets, natural gas, etc. as fuel for the hot air furnace

TONY dryer use spiral tube material, and is not easy to deform.Unlike other manufacturers with iron plate splicing welding, very easy to deformation.

Main Parts: 

(1)TONY's Rotary Drum Dryer Main Body.(Reducers With Motors and Pips)

(2)TONY's  Hot Stove.

(3)Fan Blower+Cyclone With Airlock.

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5.Pelletizing Process:

A.This process is mainly used to products pellets with φ6-8mm.

B.TONY brand vertical ring die pellet machine TYJ860-Ⅲ-280kw *8sets

C. Capacity:32-40Ton/Hour.

D.Double Screw Cycling Silo is added above the pellet machine, which has the advantages of saving space, saving labor, intelligently controlling the feeding speed, not easy to block the material, and improving production efficiency.

Main Parts:

(1)TONY New Vertical Ring Die Pellet Machine.

(2)Cyclone And Bags Dust Collectors.

(3)Bearings Automatic Lubrication System.

(4)Electrical Cabinets.

For more equipment details and information, you can contact TONY

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6.Cooling Process:

A.This process is mainly used to cool pellets from 80-90℃ to 20-30℃

B.TONY brand galvanized pellets cooler*2sets

C.Capacity:32-40 Ton/Hour.

Main Parts:                                                                                                                                   

(1)TONY's new Galvanized Pellets Cooler Separator With Vibrating Screen.

(2)Cyclone and bags dust collectors.  

(3)Fan Blower.

(4)Connect Pipes.

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7.Packing Process:

A.This process is mainly used to pack pellets into 1Ton/Bags. 

B.TONY brand ton packing machine*2sets                                                                                                                                                                                                               

C.Capacity: 32-40Ton/Hour.

Main Parts: 

(1)TONY Ton Packing Machine

(2)Electronic Platform Scale Metering System

(3)Automatic Tare, Zero, and Drop Correction Functions

(4)Feeding System Features Fast, Medium, and Slow Feeding Speeds to Ensure Measuring Accuracy

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1. Excellent environmental performance and low carbon emissions

Carbon neutrality: Straw pellet fuel is derived from agricultural and forestry waste and is a biomass energy source. The carbon dioxide absorbed during plant growth is roughly balanced by the carbon dioxide released during combustion, making it a "carbon neutral" energy source and significantly reducing its contribution to the greenhouse effect.

Low pollutant emissions: Compared with coal, the content of pollutants such as sulfur dioxide and nitrogen oxides produced by straw pellet combustion is extremely low (usually far below environmental protection standards), and the dust emission is also low, effectively reducing air pollution and meeting the requirements of increasingly stringent environmental protection regulations.

2. Wide sources of raw materials and controllable costs

(1) Abundant raw materials: The main raw materials are agricultural and forestry waste. These raw materials can be obtained and stably supplied at farms or rural cooperatives, and can even be "turned into treasure", reducing the impact of landfill or incineration on the environment. 

 (2) Cost advantage: The raw materials are mostly agricultural and forestry waste, and the procurement cost is relatively low. In addition, some regions provide subsidies for biomass energy projects, further reducing production and use costs. Compared with other energy sources such as natural gas and fuel oil, biomass energy has economic benefits.                                                                                                                               

3. High combustion efficiency and high energy utilization

(1) High density: Straw pellets are compressed and molded, and their density is significantly higher than that of logs or sawdust (usually 1.1-1.3 tons/cubic meter). They are not easy to loosen during combustion, the combustion state is stable, and the flame lasts for a long time. High thermal efficiency (usually up to 85% or more, while bulk straw is only 40%-50%).

(2) Stable combustion: The pellets are regular in shape and uniform in size, which facilitates automatic feeding and combustion control. They can be precisely adjusted with the matching pellet stove to reduce energy waste and are suitable for applications that require a stable heat source.

4. Convenient storage and transportation

Small volume: The volume of compressed pellets is only 1/5-1/8 of the original sawdust, which significantly saves storage space. They can be stored in bags or in bulk without the need for special storage facilities and are suitable for various environments such as homes and businesses. Low transportation cost: High density makes the transportation energy per unit volume higher, thereby improving transportation efficiency and reducing transportation costs. In addition, the pellets are moisture-proof (some products are treated with moisture-proof treatment), which can minimize losses during transportation.                                             

5. Diverse application scenarios

(1) Civilian use: It can be used for home heating and cooking (for example, using pellet fireplaces and pellet stoves). It is easy to operate and clean, and can replace traditional coal and firewood to improve the indoor environment.

(2) Industrial application: It can be used as boiler fuel to provide steam or hot water for factories, hotels and hospitals. In the agricultural field, it can be used for greenhouse heating and drying agricultural products (such as grains and medicinal herbs).

(3) Power generation: Biomass power plants can use it as fuel, mixed with coal, or burned alone to generate electricity, contributing to the transformation of the energy structure.

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The core value of straw biomass pellets lies in their excellent energy supply. Their energy properties are reflected in the following aspects:   

 1. Calorific Value (Energy Density)

The calorific value of straw pellets typically ranges from 15-19 MJ/kg (megajoules per kilogram), with the specific value affected by the type of raw material, moisture content, and processing method.

Higher Calorific Value: Including the latent heat of water evaporation, approximately 18-20 MJ/kg.

Lower Calorific Value: Excluding the energy of water evaporation, approximately 15-17 MJ/kg.

Pelletization significantly increases the calorific value of straw, bringing it close to that of high-quality coal (approximately 20-25 MJ/kg).

2. Combustion Characteristics

Ignition Point: Approximately 250-300°C, lower than that of raw straw (uncompressed).

Combustion Efficiency: After pelletization, combustion efficiency can reach over 85%, with low residual ash content (typically less than 10%). Volatile Matter Content: Approximately 60-75%. Combustion easily releases combustible gases, promoting complete combustion.

3. Energy Density, Storage, and Transportation

Pelletization increases volumetric energy density by 3-5 times, facilitating storage, transportation, and large-scale applications (such as boiler fuel).

Moisture Control: The moisture content after processing is typically less than 10%, significantly reducing transportation costs and the risk of mold.

4. Renewable Energy Properties

Carbon Neutral: The CO₂ released during combustion is essentially balanced by the CO₂ absorbed during plant growth, meeting low-carbon and environmental requirements.

Sustainable Raw Materials: Utilizing agricultural waste (such as corn stalks and rice straw) as raw materials reduces incineration pollution and enables resource recycling.

5. Other Related Properties

Ash Composition: Primarily contains minerals such as potassium and calcium, and can be recycled as fertilizer.

Breakage Resistance: Pellets typically have a diameter of 6-8 mm and high compressive strength (approximately 3-5 MPa), making them suitable for long-term storage.

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