Biomass Residue Pellet Production System for Fuel in Ireland

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Why Ireland?

Ireland has a growing biomass market driven by renewable energy targets:

Key drivers for biomass pellets in Ireland:

Target customers:

The client’s breakeven point is 18,000 tons/year (60% capacity). At full capacity (30,000 tons/year), operating margin is about 20-25%.

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Raw Materials: Crop Residues and Wood Waste

The client’s raw material comes from two sources:

Straw sourcing: The client contracts with farmers within 50km. Straw is baled in the field and stored in covered storage (the client’s 2,800m² warehouse). Farmers receive 30 EUR/ton — they are happy to get paid for something they used to burn.

Wood waste sourcing: Sawdust from sawmills (Irish pine, spruce) is delivered in bulk. The client has a 2,800m² warehouse for dry storage.

Raw material moisture: Straw is 15-20% moisture (sun-dried in the field). Sawdust is 20-30% (some mills deliver green, wet sawdust). The client uses a dryer to reduce moisture to 10-12% for pelletizing.

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The Site and Building 

The client’s site is in an industrial zone in County Cork, southern Ireland.

Building layout:

Production building layout (3,000m², 8m ceiling):

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Equipment Configuration

The client chose a complete biomass pellet production line with two-stage grinding and a dryer:

Equipment cost (FOB Qingdao): $485,000 USD

Why this configuration for biomass residues (7-8 t/h, 30,000 tons/year):

1. Two-stage grinding (crusher + hammer mill). The crusher breaks straw bales and large wood pieces into 3-5cm pieces. The hammer mills then grind to <6mm for pelletizing.

2. Dryer (with water scrubber). Straw is 15-20% moisture; sawdust can be 20-30%. The dryer reduces moisture to 10-12%. The water scrubber cleans the dryer exhaust.

3. 3 pellet mills. Each MZLH520 produces 2-3 t/h. Combined capacity is 8-9 t/h. The client runs all 6 for 7-8 t/h.

4. Two-stage dust collection: Bag filters for crushing/grinding dust; water scrubber for dryer exhaust.

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Process Flow 

This biomass pellet plant processes both straw and sawdust. The client runs them separately or blended.

Step 1: Raw Material Receiving

Trucks deliver straw bales and sawdust. The client stores raw material in the 2,800m² warehouse. Straw bales are stacked 2-3 high.

Step 2: Crushing (for straw and larger wood)

Straw bales are tightly compressed. The crusher breaks them apart and reduces size to 3-5cm.

Straw bales and large wood pieces are fed into the crusher.

Crusher parameters:

• Output size: 3-5cm pieces
• Throughput: 8-10 t/h

Step 3: Grinding (Hammer Mill)

Crushed material (and sawdust, which bypasses the crusher) is fed into two biomass wood pellet hammer mills.

Hammer mill parameters (each):

• Screen size: 6 mm
• Throughput: 4-5 t/h each (8-10 t/h total)
• Output: <6mm particles

Dust control: The hammer mills have bag filters. Dust is captured and returned to the material stream.

Step 4: Drying

Straw is 15-20% moisture; green sawdust can be 30%. The dryer reduces moisture to 10-12% for pelletizing.

Ground material is fed into the dryer. The dryer uses a biomass burner (fueled by self-produced pellets or wood waste).

Dryer parameters:

• Temperature: 100-150°C
• Moisture in: 15-30%
• Moisture out: 10-12%
• Retention time: 10-20 minutes

Exhaust treatment: The dryer exhaust passes through a water scrubber before being vented through a 20m stack.

Step 5: Pelletizing

Dried material (10-12% moisture) is fed into 3 biomass fuel pellet machines.

Pellet mill parameters (each, for fuel pellets):

Pellet specifications:

Step 6: Cooling and Packaging

Hot pellets (80-90°C) drop onto a conveyor to cool naturally. The client uses a cooling tower for additional cooling.

Packaging: The client uses 2 balers to package pellets into 25kg bags or 1-ton bulk bags.

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Utilities and Consumption

Electricity breakdown (annual, 250 days, 16 hours/day = 4,000 hours):

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How RICHI Customized This Line for Biomass Residues

The client had specific requirements that shaped the equipment design:

Requirement 1: Raw material includes straw (fibrous) and sawdust (powdery). The line must handle both.

RICHI solution: Two-stage grinding. The crusher handles straw bales; the hammer mills handle both straw and sawdust. The client runs them separately (straw pellets vs wood pellets).

Requirement 2: Straw has higher ash (3-5%) than wood (1-1.5%). The client needed to produce both products.

RICHI solution: The client runs dedicated production runs:

• Wood pellets for residential market (premium, low ash)
• Straw pellets for industrial market (higher ash, lower price)

Both use the same equipment; the client adjusts the sawdust straw pellet machine compression ratio and dryer temperature.

Requirement 3: Moisture varies (15-30%). The client needed a dryer.

RICHI solution: A rotary dryer with a biomass burner. The burner uses self-produced pellets or wood waste. The water scrubber treats the exhaust.

Requirement 4: The client had 20 staff, no prior pellet experience.

RICHI solution: Provided a 2-week on-site training program:

• Week 1: Basic safety, machine startup/shutdown, daily checks
• Week 2: Adjusting the dryer temperature, changing pellet mill dies, troubleshooting common problems

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Product Specifications

The client’s pellets meet ENplus A2 standards (European standard for biomass pellets), allowing export to the UK and other EU countries.

Pricing (as of August 2025):

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Market Outlook for Biomass Pellets in Ireland

Ireland’s biomass pellet market is growing. Key drivers:

1. Renewable Heat Incentive (RHI). The RHI scheme pays homeowners and businesses for using renewable heat. Pellets are eligible.

2. Carbon tax (€48/ton CO2, rising to €80 by 2030). Pellets have lower carbon emissions than oil, gas, and coal.

3. Coal and peat phase-out. Ireland is banning coal and peat for home heating. Pellets are the primary alternative.

4. Abundant straw. Farmers are under pressure to stop burning straw. The client’s collection system provides an alternative.

5. Import substitution. Ireland imports 60,000+ tons of pellets annually from the UK. The client’s production replaces imports.

Competition: There are 20-30 pellet producers in Ireland (1,000-10,000 tons/year). The client’s 30,000 tons/year makes them one of the largest.

Challenges the client is managing:

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Why a Biomass Residue Pellet Plant Makes Sense in Ireland

Ireland has abundant agricultural waste, a growing pellet market, and government support for renewable heat. Here’s why you should consider this market:

Straw is cheap. Farmers are paid 30 EUR/ton for something they used to burn. The client’s raw material cost is low.

The government supports biomass. The RHI scheme subsidizes pellet boilers. The carbon tax makes fossil fuels more expensive.

Ireland imports most of its pellets. There’s a ready market for local production. The client’s product is 20-30% cheaper than imports.

Proximity to the UK. Ireland exports pellets to Northern Ireland, Scotland, and England. Cork port is 30km from the facility.

If you’re considering a biomass residue pellet plant in Ireland (or any agricultural country), RICHI can help. We’ve designed lines for straw, sawdust, wood chips, and other crop residues. We understand Irish/EU regulations and can recommend the right equipment for your budget.

Contact us to discuss your biomass pellet project. Tell us about your raw material (type, moisture, volume), target customers (residential, industrial, export), site conditions, and budget. We’ll prepare a customized process flow, equipment list, and budget estimate — no obligation.

RICHI Machinery – Biomass residue pellet systems from 0.2 t/h to 90 t/h. Shipping from Qingdao to Dublin port: 20-25 days. Installation support available in Ireland within 2 weeks.