Boiler Description; General Information - Viessmann KOB Pyrot KRT Series Technical Data Manual

Pyrot Technical Data

Boiler Description

Boiler Description
Description
The PYROT Rotating Combustion System (patent no: EP
0 905 442 B1) was developed for automatic combustion
of all dry to moist wood fuels (remnant wood, pellets and
forest wood chips to max. W35-40, see section "Wood
Fuel Requirements". The PYROT Rotating Combustion
System is characterized by high efficiencies and perfect
combustion at all load levels. The PYROT Boiler Plant has
been built to ASME Sec. IV and has CRN for Canada. It
is tested and approved to the applicable CSA / UL safety
standards.
Function:
- The in-feed auger conveys the wood fuel diagonally
from below into the fire box. 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 fire box
is heavily insulated and lined with fire clay refractory
elements.
- The combustion gases rising from the fire box are swept
up by the rotating secondary airflow brought to bear
from the rotation blower and burned out completely in
the round combustion chamber. The thermal energy
from the combustion gases is transmitted to the boiler
water in horizontal heat exchanger tubes. The combustion
chamber 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 fire box 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.
Supplied with:
- Boiler with rotating combustion chamber and tube heat
exchanger including supply and return temperature sensors
- Fire box with moving grate and light barriers for ember
monitoring
- Automatic ignition blower
- 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 fire box, combustion
chamber and tube heat exchanger
- Installation fittings including pressure relief valve, drain
valve, low water cut off, safety temperature limiter,
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
Accessories for PYROT Rotating Combustion System:
- Flue gas de-duster 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 mixing valve
- Ecotronic 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

General Information

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