The Osby PB2 is a

reliable compact

unit for dry wood

fuels. Delivered

with all installations

and wiring needed.

Features vertical

flue gas tubes with

automatic cleaning.

The Osby PB2 is a compact, fully automatic biomass boiler designed for firing dry wood fuels like pellets, briquettes and wood chips.

The boilers vertical flue gas tubes are fitted with an automatic clean-ing system that guarantees a consistently high boiler efficiency is maintained without the need for frequent shut downs or manual cleaning. This reduces both labour- and alternative fuel costs.

The hydraulic stepped grate automatically moves the fuel through the combustion chamber and discharges the ash. The boiler is de-livered with an automatic internal ash handling system which fur-ther reduces the manual efforts required during the firing season.

Our control system can be customized to handle just the boiler functions or even the entire heating plant. It is a truly adaptive sys-tem which can also be operated and monitored remotely.

We deliver complete solutions

OSBY PB2Biomass boiler, 350 - 3000kW

The Professional´s choice since 1935

For more information on boilers in the Osby Parca product range, please visit www.osbyparca.se

+46 479 177 00 Fax +46 479 177 25sales@osbyparca.se

www.osbyparca.seBox 93, 283 22 Osby

The boiler is manufactured according to current standards and directives in Europe or USA

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PB2 operational description

A level switch controls the fuel feeding into the boiler. The combustion takes place on a stepped grate which moves the fuel forward in the furnace and finally discharges the remaining ashes into the internal ash auger. By keeping the fuel bed moving the forming of slag and cinder will be minimized. What ever waste product that formes will automatically be dis-charged together with the ash through the internal ash auger.

The boiler is controlled by a computerized system which regulates the combustion according to the current load so that a constant flow water temperature can be maintained. The computer recieves a signal from the flow water temperature sen-sor and then regulates the negative pressure of the furnace, the grate movements and the fuel infeed. The combustion air will then be regulated by the furnace negative pressure. This is a simple and reliable method which also provides a constant regulation all across the load range.

Design data PB2

Output 350 kW - 3000 kW

Design pressure 6 bar

Design temperature 110 - 140°C

Flue gas temperature <160°C

Fuel moisture <35 %

Boiler efficiency 94%

Control system

The Osby PB2 can be equipped with different control systems ranging from regulating only the boiler functions to control of the complete facility including pumps, backup boilers, valves etc. Also the contol systems can be operated remotely.

Our control systems is programmed by our own experts and can be customized totally to fit the clients demands for both new and existing facilities.

Thanks to the high level of precision of our systems the emission values will be low re-gardless of what load the boiler is operating on. The display will show the facility and the equipment using clear full sizes images.

Thanks to modern combustion technique even moist wood can be used as fuel, but when the moisture count increases the fuel consumption increases rapidly and also the need for sweeping the boiler becomes larger. Moist fuel burns unclean and produces much more sooth and ash. When using very moist fuel (>40%) it is recommended that the sys-tem is overdimensioned in regards to the desired output. The drying of the moist fuel during the combustion consumes energy and to be able to reach the desired output the system needs to be overdimensioned.

The drying process also increases the amount of flue gases and if using a smaller boiler the flow through the boiler will be much to fast for the heat to be fully utilized. This rases the temperature of the flue gases which means that the heating energy is not properly utilized. Also the risk of corrosion in the boiler, exhaust canals and the chimney increases. It is very important not to have to low return temperature, bottom temperature or flue gas temperature.

General operation for a biomass boiler

+46 479 177 00 Fax +46 479 177 25sales@osbyparca.se

www.osbyparca.seBox 93, 283 22 Osby

Combustion air control

The air is drawn into the boiler by a variable speed flue gas fan. Two throttles above and below the grate control the primary and secondary air to the combustion chamber. This air flow automatically modulates to meet the thermal demand for the boiler

Automatic flue gas tube cleaning

The automatic cleaning system means constantly clean flue gas tubes and high boiler efficiency. Vertical flue gas tubes.

Automatic ash handling

The boiler is delivered with an ash auger and a dust auger.The control system will automatically discharge the ash and dust from the boiler.

Final combustion

The furnace is designed for a very effective final combustion which means very low emissions.

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Maintenance

The PB2 is designed for minimial downtime even when performing larger maintenance task.

• The grate is easily removed from the boiler for inspection and maintenance by releasing a few conveniently located bolts

• Instrumentation, controls and operating components are easily accessible

• The control system continuously monitors operation of the boiler and generates operating logs. In the event of equipment malfunction or a if a parameter moves outside of the normal limit the boiler is automatically controlled to a safe condition and an alarm is generated

• The automatic cleaning system means that manual cleaning of the flue gas tubes is not needed during the heating season.

+46 479 177 00 Fax +46 479 177 25sales@osbyparca.se

www.osbyparca.seBox 93, 283 22 Osby

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Technical data PB2

OutputGas-

resistanceNet weight Connection

Flue gas fan

Water volume

350 kW 1200 Pa 5 ton DN 80 3 kW 1,5 m3

500 kW 1200 Pa 6 ton DN 100 4 kW 2,1 m3

750 kW 1200 Pa 9 ton DN 125 5,5 kW 3,5 m3

1000 kW 1200 Pa 11 ton DN 150 7,5 kW 4,5 m3

1250 kW 1200 Pa 13 ton DN 150 7,5 kW 6,0 m3

1500 kW 1500 Pa 14 ton DN 150 11,0 kW 7,0 m3

2000 kW 1500 Pa 18 ton DN 150 11,0 kW 8,0 m3

3000 kW 1500 Pa 26 ton DN 200 18,5 kW 13,5 m3

Dimensions PB2

Output L L1 B B1* H H1 H2 H3 A1** A2 A3** A4

350 kW 3060 1150 1050 1730 2225 1825 400 300 500 400 500 800

500 kW 3530 1150 1050 1730 2225 1825 400 400 500 400 500 800

750 kW 3750 1150 1220 1900 2250 1850 400 400 500 750 500 1000

1000 kW 4012 1150 1390 2070 2445 2045 400 400 500 750 500 1000

1250 kW 4006 1150 1930 2610 2445 2045 400 400 500 1100 500 1250

1500 kW 4150 1150 1930 2610 3100 2600 500 400 500 1100 500 1250

2000 kW 5210 1150 1930 2610 3100 2600 500 400 500 1500 500 1400

3000 kW 5920 1150 2440 3120 4090 3590 500 400 500 1500 500 1400

A maintenance space of 1300mm must be

available over the top of the convection part

Pressure drop kPa

% Output