5 T/H Commercial Wood Pellet Plant in Zimbabwe

RICHI MACHINERY

The Project Was Possible Because the Sawdust Arrived Prepared

The customer had an established timber-trading background and access to furniture-industry residues around Harare and Mashonaland East. The opportunity was not simply “cheap sawdust.” It was sawdust that had already passed through kiln-dried lumber production and mechanical dust collection, so both moisture and particle size were much closer to what a pellet press needs.

An existing 2,653 m² industrial building reduced the civil-work burden. The site already had a concrete floor, steel structure, water access and grid power, giving enough space for raw-material storage, a two-press pellet section, cooling, packing and finished-product warehousing without constructing a new factory shell.

The customer’s engineering question was whether a 5 T/H commercial wood pellet plant in Zimbabwe could run on furniture-factory sawdust without installing the size-reduction and drying sections found in a conventional green-wood pellet line.

Feedstock samples showed a consistent fine particle profile and about 7–9% moisture. That justified a simplified route, but only with strict receiving inspection, magnetic protection and the ability to add a small amount of moisture before pelleting when the driest loads created excessive die friction.

The finished design therefore uses two parallel MZLH678 pellet mills, a receiving protection stage, counterflow cooling, final screening and a central baghouse. The plant avoids equipment it does not need, but it does not skip the quality-control stages required after a 5 T/H hot pelleting process.

RICHI MACHINERY

One Feedstock Still Requires Supplier-by-Supplier Control

The customer contracts several furniture factories and sawmills within a practical trucking radius of Harare. Multiple suppliers reduce dependence on one workshop, but every load is checked for moisture, oversize particles and contamination before it enters the storage and pelleting system.

The process accepts only clean untreated sawdust. Painted wood, glued board waste, treated timber and mixed demolition residue are outside the raw-material boundary. The customer pays more for this pre-dried feedstock than for wet sawmill residue, but avoids the capital, fuel and maintenance burden of a dryer.

About 12,030 T/Y of incoming sawdust supports approximately 12,000 T/Y of finished pellets. The small difference is consistent with screening loss, dust recovery, startup loss and moisture equalization. Collected clean fines are returned to production where suitable, while used oil and maintenance waste are kept in the dedicated hazardous-waste area. Storage turnover is also planned around the one-shift schedule: at roughly 40 tons of finished output per operating day, the 700 m² raw-material zone provides a workable buffer without encouraging very long residence times for dry sawdust. That matters because even pre-dried material can pick up moisture if roof drainage, wall sealing or floor isolation is poor.

RICHI MACHINERY

Skipping the Dryer Only Works With a Dry-Sawdust Contract

Most wood pellet projects need drying when sawdust arrives from green logs or outdoor storage. This project has a different supply chain: furniture factories use dried lumber, and their extraction systems generate residue that is already close to the required moisture range.

The dryer-free route depends on three controls:

How it works:

• Only clean sawdust from approved furniture and wood-processing suppliers is accepted
• Receiving staff check moisture because loads at 7% and 11% do not behave the same in the pellet die
• Covered storage protects the dry-sawdust advantage before the material reaches production

The completed 5 T/H commercial wood pellet plant in Zimbabwe therefore has no thermal dryer or hot-air furnace. This reduces capital and fuel consumption, but it does not mean moisture can be ignored. Very dry sawdust may need a small controlled water addition at the pellet-mill feed system to stabilize compression and reduce die friction.

The commercial trade-off is clear: the customer pays more per ton for dry, clean sawdust, but avoids the equipment, fuel, floor area and operator attention required by a drying system. Whether that strategy is cheaper must be checked from actual local delivered prices rather than a universal savings figure.

RICHI MACHINERY

Two MZLH678 Pellet Mills Match the 5 T/H Annual Target

Main equipment package (EXW Qingdao): approximately US$85,000

The wheel loader was purchased locally in Harare so routine service and tyres could be sourced without importing a standard mobile machine. The imported package focuses on the two pellet mills, cooling/screening, conveying, protection and dust-control equipment.

Shipping: The main equipment shipment moved from Qingdao to Beira Port in Mozambique and then inland toward Harare because Zimbabwe is landlocked. The project freight basis includes approximately US$5,200 sea freight, about US$2,800 for the inland rail leg and about US$600 for final trucking. These logistics costs are part of the completed-project investment rather than the US$85,000 equipment price.

RICHI MACHINERY

The Existing 2,653 m² Building Leaves Room for Storage and Maintenance

The project reuses a former industrial building on a 2,653 m² property. Instead of filling the structure with unnecessary preprocessing equipment, the layout dedicates large areas to keeping dry sawdust protected, cooling and packing the finished pellets, and maintaining access around two high-load pellet mills.

The ten-person plant uses a septic system for domestic wastewater; no process wastewater is generated by the dry pellet route. The electrical connected load is approximately 440–480 kW once the two 200 kW pellet mills, cooler, screen, baghouse and conveyors are included. Annual electricity demand is planned at roughly 900,000–1,050,000 kWh depending on actual press load and operating days.

RICHI MACHINERY

A Short Process Still Needs Cooling and Screening

The plant is mechanically simpler than a green-wood pellet factory, but it is not just two pellet presses and a bag. Receiving control, moisture adjustment, cooling, screening and dust collection are all required for stable 5 T/H commercial operation. The installed MZLH capacity is deliberately slightly higher than the published line rating. Two 2.5–3.0 T/H presses can provide 5–6 T/H nameplate capacity, but the factory is sold and operated around a sustained 5 T/H balance because cooler load, screen performance, bagging rate and raw-material variation also determine real throughput.

Step 1 – Material receiving and protection
Dry sawdust moves from the 700 m² storage area through a receiving screen and magnetic protection. Loads containing oversize chunks, metal or visibly contaminated wood are isolated. Moisture is checked before the feed system; the driest material can receive a small controlled water addition before pelleting.

Step 2 – Pelleting
Two wood pellet extruder machines operate in parallel as MZLH678 presses. Each unit is rated at about 2.5–3.0 T/H, giving 5–6 T/H installed capacity. The plant publishes 5 T/H as its sustained line rating, producing 8 mm pellets for industrial heat while leaving practical margin for die condition and feedstock variation.

Both presses are required for full 5 T/H operation, but the parallel configuration allows limited production if one unit is stopped for die or roller service. Pellet formation relies on clean wood fiber and natural lignin; no routine chemical binder is required.

Step 3 – Cooling screening and bagging
Fresh pellets leave the dies hot and enter a counterflow cooler before they are screened. Loose fines are separated and recoverable clean material is recycled. The finished 8 mm pellets are then packed mainly in 25 kg woven bags or prepared for larger industrial orders. At 5 T/H, natural belt cooling alone is not used as the finished-product temperature-control system.

RICHI MACHINERY

Why the Plant Can Bypass Chipping and Hammer Milling

Most wood pellet production lines need wood chipper machines and wood pellet hammer mills because the raw material starts as logs, offcuts or coarse chips. This Zimbabwe project receives dust-collection sawdust that is already close to the required size.

The normal incoming particle range is about 1–3 mm. A safety screen and receiving inspection remove oversize material rather than regrinding every ton. This saves power and maintenance, but it also means supplier quality becomes part of the process specification.

Loads with pieces above the accepted size are rejected or handled separately instead of being forced through the pellet mills. The factory therefore saves the capital of a full grinding section while retaining the basic protection equipment needed for a commercial line.

RICHI MACHINERY

Dust Control Is Small in Equipment Count Not in Importance

The simplified process still generates dust at transfer, pelleting, cooling and screening points. A central baghouse with collection hoods serves the wood granulator machine discharge and finished-pellet handling areas.

Project dust-control basis:

• One central baghouse filter
• Approximate design airflow: 5,000 m³/h
• Exhaust stack height: 15 m
• Nominal collection efficiency used in the project calculation: about 95%

Annual particulate balance used for the project:

• Estimated total dust generation: about 12 T/Y
• Estimated baghouse capture: about 11.4 T/Y
• Estimated uncaptured / fugitive fraction within the workshop control area: about 0.6 T/Y

Captured clean fines are returned to the sawdust stream in controlled quantities. Housekeeping, filter inspection and sealed transfer points remain necessary because a high collection percentage does not eliminate settled dust around equipment.

Local environmental compliance should be checked against the project’s actual permit conditions and operating measurements. The case therefore keeps the equipment and calculated dust-control basis without claiming a blanket regulatory exemption or guaranteed compliance margin.

RICHI MACHINERY

Zimbabwe Gives the Project a Real Industrial Heat Use Case

Tobacco curing is an important heat-consuming activity in Zimbabwe, and wood-energy efficiency has long been part of the sector’s forestry and energy discussions. That makes densified biomass a technically relevant fuel option where the curing system, combustion equipment and delivered pellet cost are suitable. Other industrial and institutional heat users can provide additional demand outside the tobacco season. The commercial wood pellet plant in Zimbabwe is therefore positioned as an industrial-fuel project rather than a household-stove project. Buyers need consistent 8 mm fuel, predictable moisture and stable deliveries; the producer needs enough contracted demand to justify operating both pellet mills instead of carrying idle installed capacity.

The customer targets buyer groups rather than relying on one named sales contract:

• Tobacco-curing and agricultural-processing operations using solid-fuel heat systems
• Factories around Harare and Mashonaland East with compatible boilers or furnaces
• Institutional heat users that can store and feed bagged 8 mm pellets safely

Capacity expansion should follow contracted dry-sawdust supply and verified off-take. Adding another press before enlarging cooling, bagging, storage and electrical capacity would simply move the bottleneck to another section.

Renewable-energy and forestry policies can influence project economics, but incentives should be checked against current Zimbabwean rules and applicant eligibility. The completed factory is therefore presented on its process and market logic, not on an assumed tax benefit.

RICHI MACHINERY

The Main Operating Risk Is Losing the Dry-Feedstock Advantage

Once the plant began operating, the most important routine controls were moisture at receiving, pellet-mill load, cooler discharge temperature and bagging speed.

Controls that protect the simple process:

• Keep dry sawdust under cover so the line does not become a hidden dryer project during the rainy season
• Use two MZLH678 presses so full output is shared and limited production can continue during scheduled service
• Maintain the receiving screen and magnet even though no full crusher or hammer-mill section is installed

Items requiring regular attention:

• Use a moisture meter on every supplier group and add only controlled conditioning water when feedstock is too dry
• Keep the packing rate aligned with the 5 T/H cooler/screener output so finished pellets do not accumulate hot or exposed
• Stock one appropriate spare die and critical roller parts for each MZLH678 press

The simplified process lowers the number of machines, but it does not remove the need for power planning. With about 440–480 kW connected load and close to one million kWh of annual electricity use, stable grid supply and electrical protection remain important for a two-press commercial plant.

RICHI MACHINERY

RICHI Scope Focused on a Direct-Sawdust Pellet Route

For this 5 T/H commercial wood pellet plant in Zimbabwe, the engineering scope deliberately excludes a dryer and full grinding section while strengthening receiving control, pelleting, cooling and dust management.

• Process design – Direct-sawdust receiving, moisture conditioning, parallel pelleting, cooling, screening and bagging layout.
• Equipment package – Two wood pellet presses, receiving protection, cooler, screener, conveyors and baghouse.
• Installation supervision – Alignment, electrical interfaces, dust ducting, cooler setup and commissioning checks.
• Operator training – Moisture control, die/roller adjustment, pellet temperature, screening and dust-system maintenance.
• Spare parts kit – Die and roller wear parts, belts, bearings, cutting parts and filter bags.

The operating documentation also covers receiving acceptance, daily inspection and troubleshooting so the simplified line does not become dependent on one experienced operator.

RICHI MACHINERY

A Simple Zimbabwe Pellet Plant Starts With a Strict Sawdust Specification

For another 5 T/H commercial wood pellet plant in Zimbabwe, the first design decision should be whether the feedstock is truly dry and fine enough to justify deleting the dryer and grinding section. A supplier statement is not enough; moisture and particle size need to be measured across multiple loads.

• Pay for usable dry matter, not only a low wet-ton price. Dry furniture sawdust can justify a simpler factory when the supply is consistent.
• Keep the process simple only where the raw material allows it. Removing a dryer or hammer mill is an engineering decision, not a universal cost-saving rule.
• Match sales to compatible heat users. Tobacco curing and industrial boilers can be relevant markets, but combustion equipment and delivered fuel cost must be checked.
• Protect availability with critical spares. Two pellet mills only provide redundancy when dies, roller parts and filter consumables are available on site.

The finished project works because the feedstock condition and the equipment list match each other: 12,030 T/Y of clean dry sawdust, about 12,000 T/Y of 8 mm pellets, a true 5 T/H annual capacity requirement, two MZLH678 presses and no unnecessary thermal drying. A different Zimbabwe biomass pellet plant using wet sawmill residues would need a different process entirely, including drying and likely grinding. That distinction is important for buyers comparing project prices: the lower equipment count here is a result of feedstock quality, not a universal specification for every 5 T/H biomass line.

For a site assessment or wood pellet making equipment configuration, provide the annual dry-sawdust tonnage, moisture and particle-size ranges, working hours, building plan and target heat users. Those inputs allow the wood pellet plant construction scope to be matched to the real material instead of copied from a full green-wood process.