KOB 7010-1, PYROTEC 390, PYROTEC 530, PYROTEC 720, PYROTEC 950 Spec Sheet

Spec Sheet

PYROTEC Grate Firing System

Boiler Plant

Köb Holzheizsysteme GmbH, Flotzbachstr. 33, A-6922 Wolfurt, Tel. [phone], Fax 65707, E-Mail: [e-mail]

Subject to technical changes

7010-1

2009-03-01_GB

Description:

The PYROTEC 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 PYROTEC Grate Firing System is characterised by high efficiencies and perfect incineration at all load levels. The
PYROTEC Boiler Plant has been tested and approved in accordance with the latest quality criteria as per EN 303-5 Heat­ing Boilers for solid fuels, CE-certification in accordance with European Machinery Directive with continuous quality in­spection by the TÜV.

max. forward flow temperature allowed: 100°C
max. operating pressure allowed: 6.0 bar
Safety heat exchanger: Built into the boiler

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. The holding devices for the back-burn sensor and the thermal extin­guishing valve are situated on the conveyor pipe. Above the auger, there is a metering container with a light barrier to
ascertain the level of the fuel isolating layer required according to TRD 414.

- The material to be burned is ignited manually or automatically by an electric heat gun (separate price item). The tried­and-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 burn­back 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 dou-

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

The thermal energy from the combustion gases is transmitted to the boiler water in a horizontally positioned pipe-type

heat exchanger.

The boiler is heavily insulated, cased in an aesthetically pleasing fashion and provided with excellent access through

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

- The exhaust fan is specially designed for wood heating operation and is very quiet. solid, heat-resistant design with a
heat dissipation hub and is spring-supported. The fan casing on the intake port rotates infinitely variably, the blow-out
nozzle is round; it is usually mounted on the exhaust gas deduster (separate price item).

Scope of delivery:

- Feed auger with isolating layer, incl. extinguishing valve with dirt trap, extinguishing water container with holding de­vice

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

- Boiler with horizontal pipe heat exchanger

- Exhaust blower

- Accessories: counter-flange, incl. bolts, seals and cleaning device

ACCESSORIES for PYROTEC grate firing (Art. KPT- …) at extra charge:
Designation Article Text Dimensions Use

Exhaust gas deduster 240 l KPT-E…-2 7110 7110 Required
Exhaust gas deduster 800 l KPT-E…-8 7110 7110 Variation of 240 litres
Preparation system for de-ashing KPT-AV 7120 - optional for KPT-A2-S
De-ashing in bin 240 l KPT- A2-S 7120 7010 optional for KPT-AV
De-ashing in skip 800 l KPT- A8-S 7120 7010 Variation for 240 litres
Pneumatic cleaning system KPT-W…-S 7120 7010 optional
Automatic ignition system KPT-ZG-S 7200 7010 not suited for > W40
Set of displacement rods KPT-V… 7200 - Base load boiler from KPT-720
Flue gas recirculation system KPT-R…-S 7200 - For fuels < W20
Pyrocontrol control system PYR- … 7800 - Required

Spec Sheet

PYROTEC Grate Firing System

Boiler Plant

Köb Holzheizsysteme GmbH, Flotzbachstr. 33, A-6922 Wolfurt, Tel. [phone], Fax 65707, E-Mail: [e-mail]

Subject to technical changes

7010-2

2009-03-01_GB

Technical data:

PYROTEC Grate Firing System
Trade name 390 530 720 950 1250

Art. No.:

KPT-390
7387607

KPT-530
7387414

KPT-720
7387605

KPT-950
7378080

KPT-1250

7387606

Performance data

Nominal heat output Q

N

[kW] 390 530 720 950 1250
Continuous output 1) QD [kW] 390 530 720 950 1250
Minimum heat output 2) Q

min

[kW] 97 132 180 238 312

Heat output chips W 45 Q

W45

[kW] 380 515 700 920 1210

Efficiency in operation to be performed

3)

[%] > 90

Maximum water content

4)

[%] W 50

Size of the chips

5)

G 30 / G 50 as per ÖNORM M7133

Exhaust gas figures

Mass flow rate QN; W5; O2 8%; [g/s] 219 297 404 532 700
Volume flow QN; W5; O2 8%; 150°C [m³/s] 0.26 0.36 0.48 0.63 0.83
Mass flow rate Q

W45;

W45; O2 10%; [g/s] 303 412 560 736 968

Volume flow Q

W45

; W45; O2 10%; 150°C [m³/s] 0.37 0.50 0.67 0.88 1.15

Average exhaust gas temperature at Q

N

6)

[°C] 160

Average exhaust gas temperature at Q

min

6)

[°C] 120

Chimney draught required [Pa] +-0

Electrical connections

Electrical connections, total [kW] 5.41 7.02 8.12 9.35 11.15
Ignition device [kW] 1.6
Exhaust blower [kW] 1.1 1.1 2.2 2.2 4.0
Feed auger [kW] 1.1 1.5 1.5 2.2 2.2
Primary air blower 1 [kW] 0.14 0.3 0.3 0.48 0.48
Primary air blower 2 [kW] 0.9
Secondary airflow fan [kW] 0.9 1.5 1.5 1.85 1.85
Grate drive unit [kW] 0.12
Electric power consumption at QN [kW] 2.88 3.57 4.56 5.17 6.79
Electric power consumption at Q

min

[kW] 2.34 2.9 3.71 4.15 5.47

Heating-relevant specs

Volume on heating gas side [ltr] 1540 2280 2830 4050 5210
Volume of ash container for grate ash [ltr] 240 / 800
Volume of ash container for exhaust gas de-duster [ltr] 240 / 800
Water-bearing resistance (Diff. 15 K) [mbar] 13 23 43 26 45
Boiler water volume [ltr] 1150 1444 1861 1943 2482
Heating surface [m²] 26.32 42.50 55.50 74.80 91.00
Test pressure [bar] 7.8
Maximum operating pressure [bar] 6
Maximum boiler temperature [°C] 100
Minimum return temperature [°C] 65

Weights

Weight of fire block [kg] 2970 4238 4953 5779 6520
Weight of boiler [kg] 1680 2707 3291 4874 5563
Weight of displacement rods [kg] 394 394 394 538 538
Weight of exhaust blower [kg] 60 62 78 82 107
Weight of feed auger [kg] 153 153 153 190 190
Total weight without water

7)

[kg] 5230 7554 8869 11463 12918

Total weight with water

7)

[kg] 6380 8998 10730 13406 15400

1)

Continuous output: Output levelling out as base load boiler in continuous operation with pneumatic

cleaning.System (for track time, see Operating Instructions)

2)

Q ≥ Q

min :

Operation with modulated control (Infinitely variable power control)

Q ≤ Q

min

: Low load with ON Q

min

/ ember maintenance operation

3)

Efficiency: For dry fuels (W5 to W20) without flue gas recirculation system reduced values

For PYROTEC 720 – 1250 without displacement rods reduced values

4)

Wet fuels: >W45 further restrictions in terms of output, efficiency and control behaviour

5)

Specification: See Spec Sheet 1010, Minimum Requirements for Wooden Fuels

6)

Exhaust gas temperature: A reduction is possible by installing the displacement rods (QN - 20°C; Q

min

– 10°C)
Other influences: Fuel, water content, ash content, pneumatic cleaning
system yes/no;track time (number of operating hours without cleaning)
Specifications for the start of the track time (toward the end of the track time there is
an increase in the exhaust gas temperature by approx. + 15°C)

7)

Total weight: incl. displacement rods