HDG Compact 35kW Wood Chip and Wood Pellet biomass water heating Boiler
What is special about HDG Compact 35
Overview
Especially Clean
The advanced combustion technology of the Compact is perfectly designed to burn pellets or wood chips as fuel, resulting in very low emission values. Extremely high efficiency levels are also achieved through the combustion of this environmentally friendly fuel.
Especially Econmical
Optimitsed combustion technology results in low pellet comsumption. An advanced thermostat controls the boiler temperture ensuring that only the required amount of heat is produced.
Absolutely Safe
The HDG compact has been subjected to strict in-house and independant safety tests. The cellular wheel sluice reliably prevents back-burn and the escape of low temperture gas. This sluice wheel, combined with an integrated water extinguishing system provides total safety.
Especially Convenient
Features such as automatic transport of the pellets to the combustion chamber, automatic ignition, self activated cleaning and large ash container combine to provide maximum convenience automatically controlled by the HDG Comptronic boiler control.
Very Efficient Operation
The HDG Compact range offers unsurpassed operational efficiency. With levels of well over 90% operational running costs are almost unmatched in the biomass industry. Compact customer quote. "compared with most other wood chip boilers which at best are 70% efficient in real life my Compact uses 1 years less fuel every 5 years that is a huge saving".
The HDG Compact 35 at a glance:
The HDG Compact 35 is an automatic wood-heating system which is designed to burn wood chips, pellets and shavings (up to 45% wood moisture content, wood chips up to 50 mm 2 cross section, maximum length 120 mm).
It offers convincing features such as innovative HDG Compatronic burning and control technology, a rotary feeder for uncompromised safety, automatic cleaning and ash removal for maximum convenience as well as economical operation.
The compact and economical heating boiler is delivered completely assembled. Upon request, it can also be supplemented with reliable remote maintenance and SMS control functions.
How it works
Fuel is fed directly onto the combustion grate. Fuel feeding, primary and secondary air are controlled independently of one another. Tilting grate technology ensures that optimum performance is maintained even when the proportion of non-combustible material is increased.
The system only operates with combustion emissions at an optimum level. Prolonged smouldering is avoided while glowing hot embers are maintained. This serves to counteract the contamination of the heat exchanger and the chimney.
When the fuel reaches the fill level, it is ignited by hot air blowers. The automatic ignition feature makes the system even more convenient to operate and enables automatic operation with minimal effort from the user.
Technical Information
System type
HDG Compact 35
Nominal thermal output Wood pellet
35kW
Nominal thermal output Wood chip
30kW
Minimum thermal output
7.5kW
Boiler temperture
65-90 deg C
Max. operating pressure
3 bar
Required flue pressure
10 pa
Water content
115 L
Weight
550kg
Electrical connection
230AC, 50Hz
Flue connection size
150m (6")
The cleaning turbulators make the cleaning of the heat exchanger significantly easier. Upon demand, they can be moved automatically by means of a drive unit.
The tilting grate dumps the ashes into the ash container below. Ash and non combustible material are completely removed, thus ensuring consistent maximum output from the boiler. This concept also allows for the use of logs during emergency operation.
As an option, ash in the combustion chamber and flue ways can be conveyed by means of ash removal worms into outdoor ash containers, which are fastened to the boiler body with quick release clamps. The mobile containers are disconnected from the boiler in one simple step, so that they can be completely and easily emptied.
HDG fuel feed systems for wood chip and wood pellet boilers
FRA flexi-blade delivery system The HDG flexi-blade delivery system can be used for simple, unproblematic delivery of wood chips, pellets, planing and saw shavings from material storage bunkers with a maximum fill height of 5.00 m (max. bulk weight 250 kg/m³, max. fill height for pressed briquettes and pellets approx. 3.00 m). The flexi-blade delivery system is offered in three sizes: for 2.5 m , 3.5 m and 4.5 m bunker diameters. Two nested spring steel blades push the fuel into an auger which carries the material out of the bunker. The special design of the auger provides for energy-saving operation due to changing of the upward slope and diameter. The well-designed "shaft within tube" construction results in a separate transfer of force on the auger and turntable. This design ensures minimum material stress while enabling the auger to run in reverse. Note: a wooden intermediate base should be installed by the customer in the material bunker for the purpose of load compensation of the spring steel blades.
Suitable fuels Flexi-blade delivery system FRA, suitable for agriculturally generated wood chips (50 x 30 x 20 mm), planing and saw shavings, pressed briquettes and pellets, drive motor 0.75 kW, delivery output 75 kg/h or 0.5m³/h for wood chips, inspection opening with safety limit switch, dished base with 2 spring steel blades, bevel gear, mechanical reversal option of the fuel transfer system and Thermal safety device (heat dump) for connection to a water extinguisher unit. Maximum mounting angle for wood chip 25° for briquettes and pellets 5°.
Design Information
Typical examples
Model
Effective sweep
Centre dome to centre outlet
A
D
FRA 2.5
2.5m
2.25m
FRA 3.5
3.5m
2.75m
FRA 4.5
3.25m
3.25m
Suitable for wood chips, pellets, planing and saw shavings Maximum fill height of 5.00 m Maximum fill height for pressed briquettes and pellets approximately 3.00 m. Maximum mounting angle for wood chip 25° Maximum mounting angle for briquettes and pellets 5°.
Designed for each installation Each application for the FRA is purpose designed and is purpose built. This allows the effective sweep and the auger feed distance to be correctly designed to the requirements.
FRA accessories
Gavity feed extension tube 1.5m with flnages for material transfer from FRA feed system to Compact TBZ rotary feeder.
Gavity feed extension tube 4m with flnages for material transfer from FRA feed system to Compact TBZ rotary feeder.
Magnetic separator for installation in conveyor trough
Price list for HDG wood pellet, wood chip, split log heating systems 
Compact 25 35 fitted with intermediate pellet hopper end viewing with right side fuelling
