KOB KOB PYRTEC SERIES Assembly And Installation Instructions Manual Download Page 17

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Spec

Sheet

PYRTEC

Grate Firing System

Boiler Plant

KÖB & SCHÄFER GmbH, Flotzbachstr. 33, A-6922 Wolfurt, Tel. +43/5574/6770-0, Fax 65707, E-Mail: [email protected]

Subject to technical changes

7010-1

2006-06-01_E

The PYRTEC grate firing system has been designed for automatically burning all dry to wet wood

fuels (waste wood, pellets, wood chips, up to max. W50) and combines in the best way possible the benefits of underfeed

firing with the benefits of grate firing.

The PYRTEC grate firing system is characterized by highest efficiencies and perfect combustion in all load stages. The

PYRTEC has been tested and approved in accordance with the latest quality criteria in compliance with EN 303-5 heating

boilers for solid fuels, CE certification as per European Machinery Directive and continuous quality assurance by TÜV.

Max. flow temperature:

100°C

Max. operating pressure: 6.0 bar

Safety heat exchanger:

Built in the boiler & ready for use

Function:

- The solid, powerful and heat-resistant feed auger moves the fuel over the burner trough into the descending and into

the grate zone, which drops down and travels. Situated on the conveyor pipe are the holding devices both for the
burn-back sensor and for the thermal extinguishing valve. Above the auger there is the metering container with a light
barrier for setting the level for the fuel isolating layer required according to TRD 414.

- The fuel is either ignited manually or automatically with an electric hot-air fan (separate price item). The tried-and-

tested burner trough, the descending external grate and the moving burn-out grate made from highly-refractory cast

steel (material no.: 1.4823; approx. 12 mm) allow excellent performance control and highest safety against burn-back

in conjunction with automatic de-ashing system (separate price item) to be achieved for the combustion chamber. The

solid, horizontally positioned and large-volume firing block has been optimised in terms of incineration, consists of a

high-quality fireclay brick lining and is multiply insulated for the lowest possible surface temperatures.

In the lower part, the primary airflow is supplied to the incineration grates via a supply air fan in an output-controlled

fashion and pre-heated.

- In the upper part of the firing block, the secondary airflow is blown into the gas space of the firing system by an

output-controlled fan via an encircling ring with high turbulence via individually adjustable nozzles.

This mixes the fuel gases with fresh secondary air for complete burning.
The firebox door is solidly constructed, air-cooled and very well insulated. Opening the firebox door with its solid

double-knuckle hinges is an ideal solution for maintenance purposes.

The heat energy from the fuel gases is transferred to the boiler water in the horizontal shell-and-tube heat

exchangers.

The boiler is well insulated, possesses attractive cladding and is highly accessible through the boiler door on the front.

The insulated boiler door also allows a pneumatic cleaner to be installed (separate price item).

- The exhaust gas fan has been specially designed for burning wood and is very quiet. The spring-suspended motor

possesses a solid, heat-resistant design with heat dissipation hub. The fan housing on the intake port rotates infinitely

variably, and the blow-out nozzle is round. It is usually mounted on the exhaust gas deduster (separate price item).

Includes:

- Feed auger with isolating layer, including extinguishing valve with dirt collector, container with bracket for

extinguishing water

- Fire block with burner trough, descending external grate and moving burn-out grate