Wood Pellet Silo

COBAN Wood Pellet Silo is designed for bulk storage of finished wood pellets and biomass pellets.

It provides enclosed storage, controlled feeding and reliable discharge.

Suitable for:

• Wood pellet plants
• Biomass fuel plants
• Pellet distributors
• Biomass power plants
• Industrial boiler systems
• Pellet export and storage terminals

Wood Pellet Silo Specifications

Note: Final capacity is calculated from the actual pellet bulk density and effective silo volume. Pellet diameter, moisture, fines and storage conditions can affect the final design.

Wood Pellet Storage Capacity

Silo capacity depends on both volume and pellet bulk density.

Basic Calculation

Storage Capacity (tons) = Silo Volume (m³) × Bulk Density (kg/m³) ÷ 1,000

For example:

1,000 m³ × 650 kg/m³ ÷ 1,000
= 650 tons

The actual working capacity should not simply be treated as the maximum geometric volume.

COBAN considers:

• Pellet bulk density
• Required working capacity
• Filling level
• Storage period
• Loading rate
• Discharge rate
• Silo diameter and height

Wood Pellet Silo Manufacturer

How Does a Wood Pellet Silo Work?

The typical storage process is:

Pellet Mill → Pellet Cooler → Screening → Conveyor → Silo → Discharge → Packing / Truck / Boiler

1. Pellet Cooling

Fresh pellets are cooled before long-term storage.

Hot pellets should not be loaded directly into a large storage silo.

2. Pellet Conveying

A bucket elevator, belt conveyor or other suitable conveyor transfers pellets to the silo roof.

3. Silo Filling

Pellets enter through the roof loading system.

The filling system is designed to reduce unnecessary impact and pellet breakage.

4. Bulk Storage

Pellets remain enclosed and protected from rain and external moisture.

5. Controlled Discharge

Pellets are discharged through the bottom outlet.

The discharge system can connect to:

• Screw conveyor
• Chain conveyor
• Belt conveyor
• Packing machine
• Bulk truck loading system
• Biomass boiler feeding system

Why Use a Dedicated Wood Pellet Silo?

Wood pellets are not exactly the same as conventional grain.

They have different:

• Bulk density
• Particle shape
• Flow characteristics
• Breakage characteristics
• Moisture behavior
• Dust generation
• Storage risks

Therefore, the silo should be designed around the pellet rather than simply using a standard grain storage configuration.

Key Features of COBAN Wood Pellet Silo

Galvanized Steel Construction

Hot-dip galvanized steel provides corrosion protection and suitable structural strength for outdoor installation.

Large Storage Capacity

Suitable for both medium-sized pellet plants and large commercial storage systems.

Flexible Silo Design

Flat-bottom and hopper-bottom configurations are available.

Controlled Discharge

The outlet can be matched with the required conveying capacity.

Easy System Integration

The silo can be connected with pellet coolers, conveyors, packing systems and boiler fuel systems.

Temperature Monitoring

Temperature sensors can be installed for large-capacity storage.

Temperature monitoring is particularly important for long-term pellet storage.

Level Monitoring

A level indicator helps operators control filling and remaining inventory.

Dust Control

Filtered vents and dust collection equipment can be included according to the project requirements.

Flat Bottom vs Hopper Bottom Wood Pellet Silo

COBAN Recommendation:
For large-volume pellet storage, a flat-bottom silo is often more economical.

For smaller storage volumes or frequent complete discharge, a hopper-bottom silo can be more convenient.

The final selection depends on capacity, discharge frequency and layout.

Wood Pellet Silo Loading System

The loading system should match the pellet production capacity.

Common equipment includes:

• Bucket Elevator
• Belt Conveyor
• Screw Conveyor
• Chain Conveyor
• Rotary Distributor
• Loading Chute

The system should avoid excessive drop height.

This helps reduce:

• Pellet breakage
• Fines generation
• Dust
• Material loss

Wood Pellet Silo Discharge System

The bottom discharge system can be configured according to the customer’s application.

For Packing

Silo → Screw Conveyor → Weighing → Packing Machine

For Bulk Truck Loading

Silo → Conveyor → Loading Chute → Bulk Truck

For Biomass Boiler

Silo → Metering Device → Conveyor → Boiler Feeding System

For Multiple Silos

A common conveyor system can be designed to transfer pellets between multiple storage silos and downstream equipment.

Wood Pellet Silo Temperature Monitoring

Temperature control is one of the important differences between pellet storage and ordinary dry material storage.

Large wood pellet silos can be equipped with:

• Temperature cables
• Multi-point temperature sensors
• Digital monitoring
• High-temperature alarms

Research on large wood pellet silos has documented temperature increases inside stored pellet masses, including cases where temperatures reached approximately 65–70°C.

For this reason, temperature monitoring should be considered when designing large-volume or long-term pellet storage.

Wood Pellet Silo Safety

Wood pellets are combustible biomass.

Fine dust can also create additional fire and explosion hazards.

The complete system should therefore consider:

• Dust control
• Electrical protection
• Equipment grounding
• Spark prevention
• Temperature monitoring
• Fire protection
• Ventilation
• Inspection access
• Local safety regulations

Wood-processing facilities may also be subject to combustible-dust requirements such as NFPA 664 or applicable local standards.

Important: Safety equipment should be selected according to the actual project risk assessment and local regulations.

Can Wood Pellets Be Stored Directly After Pelletizing?

Not recommended.

The normal process should be:

Pelletizing → Cooling → Screening → Storage

Fresh pellets may retain heat after production.

Cooling before storage helps bring the pellets into a more suitable storage condition.

For large storage systems, this step should not be omitted.

Wood Pellet Storage Requirements

Before loading the silo:

• Pellets should be properly cooled.
• Pellet moisture should be controlled.
• Excessive fines should be removed.
• Pellets should meet the intended quality specification.
• The silo should be dry.
• The roof should prevent rainwater entry.
• Loading and discharge equipment should be checked.

The storage environment should be monitored during long-term storage.

Wood Pellet Silo for Humid Climates

For projects in tropical or humid regions, COBAN pays additional attention to:

• Roof sealing
• Rain protection
• Condensation
• Ventilation
• Pellet moisture
• Temperature
• Storage duration
• Silo cleaning

A galvanized steel silo alone does not solve moisture problems.

The complete storage system must be designed for the local climate.

Wood Pellet Silo Applications

Wood Pellet Factory

Finished pellets are stored after cooling and screening.

Biomass Fuel Supplier

Provides bulk storage before delivery.

Biomass Power Plant

Acts as a buffer between pellet receiving and boiler feeding.

Industrial Boiler

Provides continuous pellet fuel supply.

Pellet Export Terminal

Stores large quantities before bulk shipment.

Pellet Distribution Center

Allows pellets to be received in bulk and supplied to different customers.

Wood Pellet Silo System Layout

A typical system can be arranged as:

Wood Pellet Production Line
↓
Pellet Cooler
↓
Screening
↓
Bucket Elevator / Conveyor
↓
Wood Pellet Silo
↓
Discharge Conveyor
↓
Packing / Bulk Truck / Boiler

For multiple silos:

Pellet Production → Main Conveyor → Distribution Conveyor → Multiple Silos

This configuration allows different pellet batches to be stored separately.

Wood Pellet Silo vs Grain Silo

Key Point:
A wood pellet silo may use a similar galvanized steel structure to a grain silo, but the internal handling and safety design should be adapted to wood pellets.

Wood Pellet Silo vs Warehouse Storage

For continuous pellet production, silo storage can provide a more compact bulk-storage solution.

Wood Pellet Silo Price Reference

There is no single fixed price for a wood pellet silo.

The quotation depends on:

• Storage capacity
• Silo diameter
• Silo height
• Steel thickness
• Galvanizing specification
• Flat or hopper bottom
• Temperature monitoring
• Level indicator
• Dust collection
• Discharge equipment
• Conveyor length
• Foundation requirements
• Installation location
• Shipping distance

What Usually Costs More?

Larger capacity: Higher total equipment cost.

Hopper bottom: Usually higher steel and structural cost.

Automatic monitoring: Adds system cost.

Long conveyors: Increase project cost.

Complete storage system: Costs more than the silo body alone.

For this reason, a meaningful quotation should be based on the complete storage requirement, not only the silo diameter.

What Is Included in a COBAN Wood Pellet Silo?

A project can be configured with:

• Galvanized Steel Silo
• Silo Roof
• Inlet System
• Outlet System
• Temperature Sensors
• Level Indicator
• Dust Collection
• Screw Conveyor
• Chain Conveyor
• Belt Conveyor
• Bucket Elevator
• Rotary Distributor
• Control System

The final equipment list depends on the project layout.

Recommended Wood Pellet Silo Capacity

These are planning ranges rather than fixed models.

The final capacity should be calculated from actual production, delivery frequency and required storage days.

Where Are Wood Pellet Silos Commonly Used?

Wood pellet storage demand is closely connected with pellet production and biomass fuel markets.

Important markets include:

• United States
• Canada
• United Kingdom
• Japan
• South Korea
• Vietnam
• Denmark
• Netherlands
• Germany
• Italy
• Poland
• Romania

The UK remains a major wood pellet import market, while Japan and South Korea are also significant Asian markets. Recent trade data shows strong pellet flows from Vietnam and other Southeast Asian producers into Japan and South Korea.

For COBAN, these markets are particularly relevant to:

• Pellet manufacturers
• Biomass fuel suppliers
• Exporters
• Power plants
• Industrial boiler users
• Pellet storage terminals

Why Choose COBAN Wood Pellet Silo?

Manufacturer Direct

COBAN designs and supplies the silo and related handling equipment directly.

Customized Design

Capacity and dimensions are designed according to the customer’s material and project conditions.

Complete Storage System

Silo, conveying, discharge and monitoring equipment can be integrated into one system.

Engineering Support

COBAN can provide equipment layout, technical drawings and installation guidance.

Suitable for Export Projects

The silo structure is designed for container or bulk shipment and on-site assembly.

Flexible Capacity

From smaller commercial storage to multi-silo industrial projects.

Wood Pellet Silo FAQ

Can a grain silo be used for wood pellets?

It may be possible, but the discharge, loading and safety design should be checked for wood pellets.

What is the typical bulk density of wood pellets?

A planning value of approximately 600–750 kg/m³ can be used, but the customer’s actual pellet bulk density should be confirmed before final design.

What moisture should wood pellets have before storage?

Finished pellets are commonly stored at relatively low moisture levels. The actual target should follow the pellet specification and storage conditions.

Should wood pellets be cooled before silo storage?

Yes. Cooling should normally be completed before long-term bulk storage.

Is a flat-bottom silo suitable for wood pellets?

Yes.

Flat-bottom silos are particularly suitable for larger storage capacities.

Is a hopper-bottom silo better?

Not universally.

It can be advantageous when gravity discharge and easier emptying are important.

Can the silo be installed outdoors?

Yes.

The foundation, structural design, roof, weather protection and local environmental loads must be considered.

How much does a wood pellet silo cost?

The price depends on capacity, structure, discharge system, monitoring equipment, conveying equipment and project location.

Send COBAN your required capacity and pellet production rate for a project quotation.

Get a Wood Pellet Silo Quote from COBAN

Tell us your storage requirement.

We can help select:

• Silo capacity
• Silo diameter and height
• Flat or hopper bottom
• Loading system
• Discharge system
• Temperature monitoring
• Dust control
• Conveyor capacity
• Multi-silo layout

Send us your required capacity, pellet production capacity and project location.

COBAN can prepare a suitable Wood Pellet Silo configuration for your project.