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5797 340 - 01
Vitoflex 300-RF Installation & Operating
Boiler Description
Description
The Vitoflex 300-RF Rotating Combustion System (pat-
ent no: EP 0 905 442 B1) was developed for automatic
combustion wood, pellets and wood chips to max. 35%
moister content, see section “Wood Fuel Requirements”.
The Vitoflex 300-RF Rotating Combustion System is
characterized by high efficiencies and perfect combustion
at all load levels.
The Vitoflex 300-RF Boiler Plant has been built to ASME
Sec. IV and has CRN for Canada. It is tested and ap-
proved to the applicable CSA / UL safety standards.
Function:
- The in-feed auger conveys the wood fuel diagonally
from below into the combustion chamber. The holding
devices for the back-burn sensor and the thermal
extinguishing valve are situated on the in-feed auger.
Above the in-feed auger, there is a metering container
with a light barrier to ascertain the level of the fuel
insulating layer required.
- The wood fuel is ignited automatically by an electric
heat gun, at the time of the boiler start. The gasification
of the fuel is carried out on a feed grate moved by a
worm-geared motor. The ash falls in an ash bin below.
An automatic de-ashing system is optional. The
combustion chamber is heavily insulated and lined
with fire clay refractory elements.
- The combustion gases rising from the combustion
chamber
are swept up by the rotary secondary
airflow brought to bear from the rotary blower and
burned out completely in the round heat exchanger.
The thermal energy from the combustion gases is
transmitted to the boiler water in horizontal heat
exchanger tubes. The heat exchanger is heavily insulated
and provided with excellent access through the boiler
door in the front.
- A flue gas re-circulation system reduces the temperature
in the combustion chamber while maintaining the
highest possible degree of efficiency. This increases
the service life of the un-cooled refractory elements
in the gasification zone. With the basic setting, the
ratio of re-circulated gas to fresh air is precisely
adjusted according to the amount of wood fuel that
is burned. A mechanical adjustable damper provides a
constant ratio of the quantity of re-circulated gas to
fresh air over the entire output range.
- The flue gas blower is specially designed for wood
heating operation and is very quiet. The motor has a
solid, heat resistant design with a heat dissipation hub
and is spring supported. The blower casing has a round
intake port and a round blowout nozzle. Installation
is possible on the top, side or rear of the flue gas
collector within 360° rotation.
General Information
Boiler Description
Supplied with:
- Boiler with rotary heat exchanger including supply and
return temperature sensors
- Combustion chamber with moving grate and light
barriers for ember monitoring
- Automatic igniter
- In-feed auger including insulating layer, safety end
switch for maintenance lid, back-burn temperature
sensor, extinguisher valve with strainer, extinguisher
water container with mounting bracket
- Set of displacement rods
- Flue gas re-circulation system
- Flue gas blower including flue gas temperature sensor
and oxygen sensor
- Draft damper for installation in the flue gas pipe
- Boiler cleaning tools for the combustion chamber and
heat
exchanger
- Installation fittings including pressure relief valve, drain
valve, low water cut off, fixed high limit,
temperature and pressure gauges
Customer supplied:
- Counter flanges for the boiler supply and return
- Piping to the mixing valve, boiler pump and hot water
storage
tank
- Piping for the safety heat exchanger
- Wiring to the control panel
- Separate electrical circuit for pneumatic cleaning
system air compressor, when used.
Accessories for Vitoflex 300-RF Rotating Combustion
System:
- Flue gas cyclone 24 USG (90 L)
- Metal mesh filter
- Automatic de-ashing system in bin, 63 USG (240 L)
- Automatic de-ashing in bin, 211 USG (800 L)
- Automatic de-ashing in base container
- Pneumatic cleaning system
- Operating pressure 30 or 60 psi
- Two-stage in-feed auger
- Insulation for flue gas re-circulation line
- Thermal safety flush valve
- Slide valve / Rotary valve
- Boiler pump and boiler 3-way mixing valve
- Ecocontrol control system options:
- 3 sensor hot water storage tank management system
- External control module for field supplied extraction
system
- Output module / Input module
- Input module 0-10V
-
ModBus
- BacNet gateway
-
Visualization