Crop Straw Wood Pelletizing Plant in Chile

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A Quick Look at the Project

This 8t/h crop straw wood pellet production line in Chile operates with two parallel pelletizing lines installed inside a newly extended steel structure workshop. The total plant area is around 2,600 m², arranged in a long north-south layout.

The line combines drying, crushing, mixing, and pelletizing into a relatively compact configuration. Not everything was perfect at the beginning. The first few trial runs had issues—material either came out too wet or too dusty—but that’s pretty typical when dealing with mixed raw materials like straw and sawdust.

Another key detail: about 20% of the raw material can go directly into pelletizing, while the remaining 80% needs drying. This ratio influenced almost every equipment decision we made.

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Project Background

The client is a mid-sized agricultural operator in southern Chile, working across grain farming and small-scale forestry. The region produces large amounts of:

• Wheat straw
• Corn stalks
• Sawdust from nearby sawmills

Previously, these materials were either burned in the field or left unused.

Around March 2024, the client reached out with a very direct question:

“Can we turn all this into something we can actually sell?”

By May 2024, after evaluating raw materials and local fuel demand, we signed the contract for a biomass pelletizing plant.

The main goals were clear:

• Handle agricultural waste efficiently
• Reduce open burning
• Produce biomass fuel for local heating markets
• Keep investment controlled and practical

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Raw Materials

In Chile, especially in agricultural regions, raw materials are not uniform. That’s something many new investors underestimate.

This biomass pellet project mainly uses a mix of crop residues and wood waste:

Moisture varies a lot. Straw can be relatively dry, while sawdust—especially fresh—can go above 40%. That’s why drying becomes a critical part of this biomass pellet plant design.

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Equipment Configuration (Two Lines, Practical Setup)

The equipment selection was not overly complicated, but it had to match the raw material condition and budget.

Here’s the core equipment list:

We used two biomass fuel pellet machines to reach the 8 t/h capacity. This also gives flexibility—one line can run while the other is under maintenance.

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How the Process Was Adjusted

Initial Situation (What Was Wrong)

When we first reviewed the site, several issues were obvious:

• Open material handling → heavy dust
• Only cyclone dust collection → insufficient emission control
• Manual transfer points everywhere
• Wood-fired furnace → unstable heat supply
• Dust accumulation in crushing area

Honestly, it looked like a typical early-stage setup—functional, but not sustainable.

Final Process Design

After optimization, the pellet processing line follows this flow:

1. Raw Material Storage
   • Straw and sawdust stored in covered pit
   • Dust suppression with net cover and misting
2. Feeding & Drying
   • Screw feeder instead of manual feeding
   • Biomass fuel replaces wood for heating
   • Rotary dryer reduces moisture
3. Air Separation + Dust Control
   • Cyclone + bag filter combination
   • 20m exhaust stack for clean emission
4. Crushing Section
   • Fully enclosed crusher area
   • Negative pressure dust extraction
5. Buffer Storage (Silo instead of open piles)
   • Eliminates secondary dust
   • Improves feeding consistency
6. Pelletizing
   • Dual biomass wood pellet machines (MZLH768 type)
   • Stable compression ratio for mixed material
7. Packaging
   • Manual bagging (cost-effective choice)

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Production Performance (After Adjustment)

After commissioning, the plant stabilized at:

• Capacity: 8 t/h
• Annual output: 20,000 tons
• Moisture (final): ≤10%
• Bulk density: ≥600 kg/m³

At the beginning, operators struggled with moisture control. One operator joked:

“If it rains, the pellets feel it before we do.”

We later adjusted feeding speed and drying temperature, which solved most of the inconsistency.

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Utilities and Operation Details

No process wastewater is generated. Only domestic sewage, which is treated locally.

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Environmental Upgrade

The environmental upgrade was actually one of the key reasons the project succeeded.

Instead of just adding equipment, we redesigned the dust control logic:

• All transfer points enclosed
• Centralized bag filter system
• Negative pressure in critical zones
• Pellet fuel used in furnace

Dust collected from filters is reused directly in production—nothing wasted.

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Investment & Timeline

• Inquiry received: March 2024
• Solution finalized: April 2024
• Contract signed: May 2024
• Installation completed: August 2024
• Trial production: September 2024

Equipment cost: around USD320,000

The client kept the budget tight, so we avoided unnecessary automation.

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Shipping & Logistics

All equipment was shipped from Qingdao Port, China to Port of San Antonio, Chile.

Delivery time was roughly 35–40 days by sea.

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A Few Things We Learned From This Project

• Straw + sawdust is workable, but drying must be carefully controlled
• Open transfer systems always become a dust problem later
• Small layout adjustments can save a lot of labor
• Pellet fuel for furnace is more stable than raw wood

And one practical thing:

If operators rely too much on manual feeding, production consistency will always fluctuate.

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Market Outlook in Chile

Chile has been pushing for cleaner heating solutions, especially in southern regions where wood burning is common.

Biomass pellets are gradually replacing traditional firewood because:

• More stable combustion
• Lower emissions
• Easier transport and storage

For a plant like this:

• Local demand is steady
• Raw materials are abundant
• Entry barrier is not too high

This 8t/h crop straw wood pellet production line in Chile is not the biggest project we’ve done, but it’s one of the more “real” ones.

It started with a messy yard and turned into a functioning biomass pellet plant that generates value from waste.

We didn’t just supply machines here. From layout planning, process adjustment, to on-site troubleshooting—we stayed involved the whole way.

If you’re sitting on agricultural waste and wondering whether it can be turned into fuel, the short answer is: yes, but the details matter.

And that’s usually where biomass pellet making plant projects succeed or fail.