Wood Pellet Processing Plant in Thailand

RICHI MACHINERY

The First Question That Changed Everything

Most people looking for a 1t/h wood pellet processing plant in Thailand start with the pellet mill. They ask about die sizes, motor power, throughput rates. Standard stuff.

This client started with a different question: “Can I get the oil out first?”

He’d been watching the essential oil market in Southeast Asia. Cedarwood oil prices had climbed 40% in two years. Chinese buyers were paying premium rates for natural cedrol-rich oil for traditional medicine and incense. Meanwhile, the biomass pellet market in northern Thailand was growing steadily – factories switching off LPG, chicken farms needing consistent heating for broiler houses.

He had access to discarded cedar rootstock from three provinces. Thousands of tons of stumps that farmers considered waste. The oil was in there, locked in the wood. The fiber was in there too.

But nobody in Thailand was doing both.

We spent two weeks on calls and site photos before we even talked about equipment. The client sent us wood samples. We tested them in our lab. The results: 8-12% oil content by weight, depending on how long the stump had been sitting. The lignin content was high enough for good pellet binding. The challenge was moisture – fresh stumps ran 40-50% water.

So the 1t/h wood pellet processing plant in Thailand needed to solve three problems at once:

1. Extract oil efficiently from wet, chunky wood
2. Dry the post-extraction fiber without spending a fortune on energy
3. Pelletize the dry fiber at 1 ton per hour consistently

Here’s how we actually did it.

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Raw Materials – What Comes In

The client built supply agreements with small forestry operations and three sawmills. No single source provides everything – that would be too risky. Instead, he collects from multiple points across northern Thailand.

The aged material is actually better for oil extraction – lower moisture means less steam energy wasted on evaporation. But the fresh stumps are free or very low cost. The client pays 200-300 THB per ton ($5.50-8.30 USD) for delivery on fresh material. Aged wood costs more because someone already handled it – about 500 THB per ton ($14 USD).

For the pellet side specifically, the 10,000 tons of output requires about 10,500-11,000 tons of post-extraction fiber. The math works because the oil extraction removes roughly 1,000 tons of volatiles (mostly oil, some water vapor). So 11,000 tons in → 1,000 tons oil + 10,000 tons pellets.

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How the 1 t/h Wood Pellet Processing Plant in Thailand Actually Runs

The line is split into two integrated phases. Phase one is oil extraction. Phase two is pellet production. They share space but operate on different schedules.

Phase One: Oil Extraction (Runs 16 hours/day, 2 shifts)

Step 1 – Reception and Sorting
Trucks dump stumps on the concrete receiving pad. Workers pull out rocks, metal, and obviously rotten wood. About 2-3% gets rejected and sold as low-grade firewood locally.

Step 2 – Primary Crushing
A 37kW jaw-style crusher breaks stumps down to 50-80mm chunks. This is coarse. We don’t want fine dust yet – fine material would pack in the distillation vessels and block steam flow.

Step 3 – Steam Distillation
Sixteen distillation vessels. Each holds 500-550kg of wood chunks. Live steam at 105-110°C, 1.5 bar pressure, cycles through each vessel for 5 hours. The steam carries cedar oil vapor out the top. The wood inside ends up at 60-65% moisture and nearly zero oil content (below 0.5% residual).

The client’s boiler is biomass-fired (4 t/hr capacity) and burns pellet fines, reject pellets, and some of the drier wood waste. No fossil fuels.

Step 4 – Condensation and Separation
The oil-steam mixture passes through a shell-and-tube condenser. Cooling water comes from a 50m³ holding tank with a small cooling tower. Condensed liquid is about 85% water, 15% oil. A gravity separator splits them – oil goes to 200-liter drums, water returns to the cooling loop.

Step 5 – Passive Drying
This is where a lot of engineers would spec a rotary drum dryer. We didn’t. The client had land and a low electricity cost. We built a 400m² concrete pad with a corrugated steel roof (no walls). Post-distillation wood gets spread 15-20cm thick. Front-end loader turns it twice per day. In Chiang Rai’s climate (30-35°C daytime, 50-70% humidity), moisture drops from 65% to 18-22% in 4-5 days.

Slow? Yes. Cheap to operate? Also yes. The drying cost is basically zero.

Phase Two: Pellet Production (Runs 8 hours/day, 1 shift)

Step 6 – Fine Grinding
Dried, oil-free wood goes through a 75kW hammer mill with a 6mm screen. The material is now at ideal moisture for pelleting (18-22% MC). The hammer mill produces a uniform flour-like consistency.

Step 7 – Pelleting
Single RICHI 420 ring-die wood pellet mill. Main motor 110kW. Die diameter 8mm, effective thickness 65mm. The steam treatment earlier actually helps here – the lignin has been heat-softened once already, so it re-softens faster during pelleting. We started with a 2.5mm die gap and got cracked pellets. Adjusted to 3.2mm gap, reduced roll pressure by 15%. Now it runs smooth.

Sustained output is 1.0-1.2 t/h. We rate it at 1 t/h for quoting purposes, but in practice it runs slightly higher.

Step 8 – Cooling
Counterflow cooler drops pellet temperature from 85°C to 35°C. Retention time about 15 minutes. Airflow is 2,500 m³/hr.

Step 9 – Screening and Bagging
Vibrating screen with 3mm and 8mm decks. Fines (about 4% of output) go back to the pellet mill feed. Overs (rare) get crushed and re-screened. The client packs 70% of output in 1-ton bulk bags for industrial customers, 30% in 15kg retail bags for household stove users.

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Equipment List – What Shipped from Qingdao

The 1t/h wood pellet processing plant in Thailand was supplied as a complete equipment package. Client handled local installation with our remote supervision.

Equipment price (EXW Qingdao port): $312,000 USD

The boiler (4 t/hr biomass-fired) was sourced locally in Thailand – cheaper than importing, and local service network exists. Client paid 1,200,000 THB ($33,000 USD) for a used but reconditioned unit.

Shipping: Two 40-foot high cube containers. Departed Qingdao July 10, 2024. Arrived Laem Chabang Port (Thailand’s largest deep-sea port, about 800km south of Chiang Rai) on July 28, 2024. Inland trucking added 3 days and $1,800 USD.

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What We Had to Adjust After Startup

No project goes perfectly. Here are three things that needed fixing on this 1t/h wood pellet processing plant in Thailand.

Problem 1 – The distillation vessels took too long to load.
The original design had top-mounted lids. Operators needed ladders to reach them. Loading 500kg of wood chunks by hand took 20 minutes per vessel. Sixteen vessels meant over 5 hours of loading time.

Fix: We shipped quick-open side doors as a retrofit kit. Now one operator loads from ground level in 8 minutes per vessel. Cut total loading time from 5+ hours to 2 hours.

Problem 2 – The passive drying pad wasn’t draining well.
The concrete pad had insufficient slope. Water pooled in one corner during rainy season. Wet wood stayed wet for 8-9 days instead of 4-5.

Fix: Client cut drainage channels (inexpensive, done by local labor). We also added a second turning per day during wet months. Problem solved for under $500.

Problem 3 – Pellet mill die cracked at hour 380.
Standard dies for pine or hardwood sawdust don’t like cedar fiber. Cedar is more abrasive. The first die lasted only 380 hours – well below the expected 1,000+ hours.

Fix: We switched to a chrome-stainless alloy die with larger compression holes (60mm effective length instead of 65mm). Second die is at 1,200 hours and still running. The client now keeps a spare die in stock – cost $1,800, but cheaper than downtime.

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Operating Costs – Real Numbers

This is what the client reported after three months of steady operation.

Revenue breakdown:

The oil completely dominates the financial picture. Even at conservative prices (the client has contracts at $16-22/kg depending on purity), the oil revenue covers all costs and then some. Pellets are essentially a free co-product. The client’s payback period on the equipment is under 6 months.

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Why Thailand for This Type of Project?

Northern Thailand has three things that make a 1t/h wood pellet processing plant in Thailand work for cedar processing.

First: Abandoned stump wood is everywhere. The country planted massive amounts of fast-growing cedar and pine in the 1990s. Those plantations are now being replanted. Stumps have negative value – people pay to remove them. Our client gets most material for free or very low cost.

Second: The essential oil market is mature but still growing. Thailand already exports vetiver, kaffir lime, and citronella oils. Cedarwood oil fits the existing distribution channels. Buyers in China, India, and Europe are actively looking for natural cedrol sources.

Third: Industrial pellet demand is rising but supply is fragmented. Northern Thailand has hundreds of small factories (rubber processing, food drying, chicken farms) that want consistent fuel. They’re tired of LPG price spikes. A 1t/h wood pellet processing plant in Thailand can sell every ton it makes within 150km of Chiang Rai.

The client is already talking about a second wood pellet production line. Same model – oil extraction first, then pellets. But with larger distillation capacity and a mechanical dryer to speed up the post-extraction step. He wants to scale to 3 t/h on the pellet side.

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What We Provide Beyond the Machines

We don’t just ship equipment. For this 1t/h wood pellet processing plant in Thailand, we delivered:

• Process design for the two-phase operation (oil then pellets)
• On-site supervision during installation (our engineer spent 19 days in Chiang Rai)
• Operator training – three days on the pellet mill alone, including die changes and hammer reversal
• Spare parts kit: one spare die, two sets of hammers, bearings, belts, and a box of sensors
• Remote troubleshooting support via WhatsApp (responded to a 10 PM call about a stuck conveyor within 20 minutes)

The client asked recently: “Would you do anything different if we did this again?”

Yes. We’d spec a small mechanical dryer as a backup for the rainy season. The passive pad works 9 months per year. The other 3 months, drying takes too long. A small 1 t/hr rotary dryer (burning pellet fines) would solve that. But the client didn’t want the extra capital cost upfront. Fair enough.

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Thinking About a Similar Project?

If you have access to oil-bearing wood – cedar, pine, eucalyptus, camphor – and you’re in a region with both essential oil buyers and industrial fuel users, this two-product model is worth a serious look.

The equipment isn’t complicated. The process isn’t new (steam distillation has been used for centuries). What matters is integration – making the two halves work together without one starving the other.

We’ve now built three of these dual-purpose lines. Thailand was the first. Then a smaller version in Vietnam (camphor wood). Then a larger one in Indonesia (patchouli and cedar mix).

Each one needed different adjustments. Different drying strategies. Different pellet mill settings. But the core idea works: extract the high-value compounds first, then pelletize the residue.

If you want to talk about your raw material – what you have, what you want to make – send us a message. We’ll tell you honestly if it makes sense. And if it doesn’t, we’ll tell you that too.