0.6-1 T/H Paper Granulator for Biomass in Finland

Begin with the paper fraction the boiler can accept

The proposed supply is a dry, source-sorted paper-rich reject fraction from a commercial materials-recovery operator. Material suitable for paper recycling should remain in that recovery route. Fuel preparation starts with a defined non-recyclable fraction and documented acceptance criteria.

The fuel file needs moisture, ash, net calorific value, chlorine and relevant metals. Fillers, coatings, inks and residual plastics can change the combustion and ash characteristics. Granulation changes physical form; it does not establish the material's fuel classification or remove contaminants.

The retained paper-qualified shredder and secondary mill prepare the accepted material. Metal and other foreign-material separation takes place before fine size reduction. Initial trials use paper fragments with a largest dimension below approximately 5 mm and a moisture target of 10–12% on a wet basis.

Those targets require testing with the actual fibre mix. Long strips can bridge above the press, while moisture variation changes compaction behaviour. Die profile, feed preparation and any binder requirement should be evaluated together.

The material test should record feed condition, motor load, granule temperature and the amount returned from screening. Retain samples of both feed and granules so the agreed output can be tied to a defined paper grade.

Two presses for a limited supplementary fuel stream

The proposed arrangement places two MZLH350 paper pellet machines in parallel. Each has an arch-breaking feeder and a forced feeder to deliver the light paper fragments into the pressing section. Separate feed control permits staged operation and individual material trials.

The paper target is defined as accepted, cooled and screened granules. The published reference range does not guarantee that output on every paper fraction. Changing diameter requires a different ring die; the cutter controls length.

At 800 kg/h across eight scheduled hours and 200 production days, the planning quantity is 1,280 tonnes annually, before availability and rejection allowances. That modest stream supports controlled fuel diversification. Further expansion needs a matching supply of accepted paper and additional boiler demand.

Meter the granules separately from forest chips

The receiving boiler in this design is a bubbling fluidized bed unit. The combustion review needs to address bed behaviour, particle carryover and ash removal for the accepted paper fraction.

Paper granules and forest chips have different sizes, bulk densities and handling characteristics. A separate buffer bin and controlled dosing point allow the operator to measure the paper stream near the boiler feed system. Storage and discharge trials should check bridging, fines and segregation.

Fuel substitution is calculated from energy input. Using an illustrative as-received net calorific value of 14 MJ/kg, firing 800 kg/h supplies approximately 3 MW. Against a boiler operating at 60 MW fuel input, that represents around 5% at that operating point. Laboratory fuel results replace the assumed calorific value before a combustion trial.

The production schedule and buffer inventory determine how many hours the boiler can sustain that firing rate. Annual substitution must follow actual fuel deliveries and boiler operating records.

The boiler operator and its combustion specialist establish the permitted trial conditions. Monitoring should cover feed stability, combustion performance, emissions and ash behaviour. A granule diameter alone cannot establish an acceptable co-firing percentage.

Prepare the indoor buffer before the first winter

Covered reception and an indoor conditioning buffer protect the prepared paper supply. Wet or frozen bales need assessment before processing; where thawing is necessary, moisture must be checked through the bale rather than only at its surface. A fixed thawing time would be unreliable across different loads.

Finished granules need a defined cooling and screening stage before enclosed storage. Warm product, cold surfaces and moisture ingress can undermine storage quality. The layout should manage condensation, remove fines and provide access for cleaning without relying on the press to solve storage problems.

Acceptance sampling should follow the granules through the intended conveyor route. Measure dimensions, bulk density, durability, fines and moisture after handling. The useful product is the fuel delivered to the dosing system, so that point belongs in the acceptance plan.

Keep the supply scope tied to the existing plant

The main machinery order consists of the two presses and their feeders. The quotation should separately identify shared cooling, screening, extraction, conveyors, storage interfaces and controls. The listed 79.9 kW covers only the press and feeder drives.

Finland's nominal supply frequency is 50 Hz. The electrical package needs confirmation of actual site voltage, starting method, protection and integration requirements. Paper-dust containment, ignition control and the required conformity documentation also belong in the engineering review.

Foundation loads, lifting points, service clearances and building headroom must follow the supplier's arrangement drawings. The proposed operating plan assigns a process operator to the granulation station, with shared forklift and maintenance support. The existing boiler team retains fuel-admission and combustion control.

Shipping can be planned from Qingdao to Vuosaari Harbour in Helsinki, followed by inland transport. Final packing, route and installation support are agreed against the completed equipment list. Freight, taxes, site work and auxiliaries require their own quotation scope.

For a paper granulator for biomass in Finland, the most useful enquiry starts with an accepted paper sample, its fuel analysis and the boiler's fuel specification. Add the required hourly stream and winter storage arrangement. RICHI Machinery can then define the granulation trial and equipment interfaces around the fuel the plant can actually use.