Pre-fire ramp - Sacmi
Pre-fire ramp - Sacmi
Pre-fire ramp - Sacmi
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Scheme of pre-<strong>fire</strong> <strong>ramp</strong><br />
INDUSTRIAL FURNACES<br />
FOR CARBON PRODUCTS<br />
9 9<br />
12<br />
11<br />
10<br />
3<br />
16<br />
5 17<br />
7<br />
3<br />
2<br />
1<br />
13<br />
14<br />
15<br />
8<br />
1<br />
Components<br />
Coupling<br />
7 Manometer<br />
13 Ball cock<br />
2 Hose 8 Orifice plate<br />
14 Solenoid valve<br />
3 Ball cock<br />
9 <strong>Pre</strong>ssure monitor<br />
15 Hose<br />
4 Solenoid valve<br />
10 Ball cock<br />
16 Safety blowoff valve<br />
5 Gas pressure<br />
11 Zero pressure governors 17 Safety shutoff valve<br />
6 Filters<br />
12 Manometer<br />
PRE-FIRE RAMP<br />
RIEDHAMMER GmbH • Industrial kiln plants<br />
Klingenhofstrasse 72 • 90411 Nürnberg • Germany<br />
Telephone: +49 911 52 18-0 • Telefax: +49 911 52 18-231<br />
e-mail: mail@riedhammer.de • www.riedhammer.de<br />
C105_e_01/02/04
RIEDHAMMER has been an innovative partner for the production of carbon products for<br />
decades.<br />
Functional scheme<br />
CARBON DIVISION<br />
THE FUNCTION<br />
For the production of high-quality anodes<br />
the heating-up rate is a decisive factor for<br />
obtaining excellent physical and eletrical<br />
product properties. By using a pre-<strong>fire</strong> <strong>ramp</strong><br />
an optimum heating-up rate can be realized.<br />
Thereby a flatter heating-up gradient is<br />
rendered possible in the "critical" temperature<br />
range between approx. 280 °C<br />
and 460 °C on the product (degasifying<br />
phase). This is a decisive factor for the<br />
product quality.<br />
Setpoint value curve<br />
Flue gas transfer bend:<br />
Modification of the furnace<br />
draught<br />
Expected<br />
product curve<br />
Burner <strong>ramp</strong>s:<br />
Modification of the fuel<br />
supply<br />
In the first section of the preheating zone<br />
a steep gradient is adjusted on the product<br />
up to a temperature of 250 °C<br />
(see functional scheme).<br />
The optimized heating-up in the first section<br />
shortens the total baking cycle.<br />
<strong>Pre</strong>-<strong>fire</strong> <strong>ramp</strong>:<br />
Modification of the<br />
fuel supply<br />
Moreover the volatiles contained in the flue gases are partly burnt out leading to a reduced<br />
Burner <strong>ramp</strong> (gas)<br />
Burner <strong>ramp</strong><br />
(heavy oil / tar)<br />
pollutant emission.<br />
<strong>Pre</strong>-<strong>fire</strong> <strong>ramp</strong> (gas)<br />
Flue gas transfer bend<br />
THE TECHNOLOGY<br />
Fire direction<br />
Igniting and monitoring:<br />
variable air. Thereby an optimum gas/air<br />
TECHNICAL DATA<br />
Since the pre-<strong>fire</strong> <strong>ramp</strong> works within a temperature<br />
range below the auto-ignition temperature<br />
of > 750 °C, automatic flame supervisors<br />
are used. These automatic flame<br />
supervisors permit an optimum ignition and<br />
also ensure a flame monitoring by means<br />
of ionization electrodes.<br />
ratio and an efficient combustion is realized.<br />
Operation mode:<br />
Owing to the three available operation<br />
modes, automatic remote-controlled operation,<br />
local automatic operation and manual<br />
operation, the system reaches a relia-<br />
Number of burners<br />
Burner power<br />
Possible heating media<br />
Calorific value<br />
Inlet pressure<br />
Connected load<br />
1 burner per <strong>fire</strong>shaft<br />
40 kW / burner<br />
Gas (natural gas, producer gas,<br />
coke gas and others)<br />
2 500 - 14 000 Kcal / Nm³<br />
150 - 4 000 mbar<br />
6 kVA<br />
Double operation safety:<br />
bility of 100 % and permits flexible use.<br />
All <strong>ramp</strong>s are equipped with one additional<br />
pressure measuring converter each which<br />
releases the gas valves in connection with<br />
the downstream arranged safety chain. In<br />
case of a furnace draught failure, the main<br />
gas valve is automatically closed.<br />
Wireless system:<br />
The pre-<strong>fire</strong> <strong>ramp</strong> is equipped with a wireless<br />
link transmitting relevant data such as for<br />
example temperature and pressure values,<br />
burner functions etc. from and to the central<br />
Switchboard with three operation modes:<br />
Automatic, remote-controlled operation<br />
Local, automatic operation<br />
Manual operation<br />
It serves for regulating the gas/air volume<br />
in dependence of the setpoint tempera-<br />
Switchboard<br />
computer and the visualization system. The<br />
ture value and for controlling all further<br />
Economic baking:<br />
system recognizes the position of the indivi-<br />
electrical devices on the <strong>ramp</strong>.<br />
The required gas flow is dosed in the pre-<br />
dual <strong>ramp</strong>s and integrates this information<br />
It is constantly connected by wireless link<br />
scribed ratio in dependence of the reference<br />
in the control circuit.<br />
with the central computer.