GAS FLARES FOR BIO-and DIGESTERGAS

TASK

We require gas flares with visible flame for the safe disposal of biogas and sewage gas, when energy use in combined heat and power or heating is not possible. The flare is to ensure that no gas can escape into the atmosphere unburned and therefore to avoid a risk to humans and the environment.

CONSTRUCTION

They consist of a nozzle, an injector, a flame protection tube and fitting groups. The gas-touched parts are made of stainless steel, AISI 304 or 316 Ti.

The fitting group is installed in the substructure. The substructure is made of carbon steel or stainless steel.

The flare body is fixed on the substructure and contains the nozzle with the injector as well as the ignition and flame monitoring electrodes.

The fitting group consists of a motor driven valve (slow opening, fast closure, power-off while remaining closed), a flame arrester valve and a pressure switch.

The control system is installed in a control cabinet made of stainless steel and fixed on the substructure. The internal wiring between the fitting group and ignition system is prepared completely.

FUNCTION

Excess gas can be combusted via a gas flare, if a corresponding signal starts the operation of the flare. In the normal operation process the gasholder gives this signal. When the gasholder has reached its maximum filling level, the filling level measuring device activates the signal for the flare. Then the flare opens the motor driven valve and starts the ignition process. After opening the motor driven valve the gas flows through the nozzle and sweeps air in the injector. A combustible gas/air mixture is developed in the combining tube.

After the effected ignition and a stable flame formation the flare burns until the switch-off signal is activated by the filling level measuring device of the gasholder. The motor driven valve is closed; the combustion process is stopped. Alternatively, the fluctuating gas pressure in the gas system can be used as the switch-on signal. For this special purpose the flare holds gas pressure control devices.

The control cabinet contains the complete control system for the ignition and flame monitoring device. The out-flowing gas/air mixture is ignited in the combustion chamber by an ignition electrode which is fed by an ignition transformer. The flares are directly ignited. When the flame is ignited a flame monitoring device with an ionisation electrode is activated. In case of a malfunction/breakdown of the flame the ionisation current is interrupted, the magnet valve is closed via the automatic firing device; gas cannot flow out anymore.

In case of an operational switch-off by a signal or a lack of pressure an automatic restart is effected when the criteria of a restart are available again. The flame can be visible during combustion

SCOPE OF DELIVERY – Flares with visible flame

Substructure

Open substructure, carbon or stainless steel for installation of the valves and the control cabinet

The burner is mounted on the substructure.

Burner

The burner comes with a

Gas nozzle:

Interchangeable, installed in the gas supply line

Ignition device:

Installed at the body of the flare consisting of ignition and flame monitoring electrode for the direct ignition with the ignition plug monitoring of the flame according to the ionisation principle

Flame tube:

Short version with injector as the mixing device

Flame arrester:

Easy to maintain due to the installation according to ATEX with CE declaration of conformity

Gas supply pipeline:

 Consisting of

• Standpipe in stainless steel 304 or 316 Ti and a gas supply system optionally with horizontal or vertical outlet
• Main load magnet valve or main load motor valve one or two-stage opening, fast closure control voltage 230 V, quality grade A
• Gas pressure control device in order to switch the gas flare on or off.

Control cabinet:

• Made of stainless steel or coated aluminium
• With control elements and main switch
• Control system with a small PLC
• Control unit for gas burner in order to control the flame
• High-voltage transformer for the generation of ignition sparks
• Heating for the control cabinet

Options for the switching-on – standard:

• Automatic (e.g. by filling level in the gasholder)
• Change in pressure
• Manual

°CELSIGAS STANDARD SIZES – Flares with visible flame

Capacity Volume flow	Combustion heat performance	Power genset	Blower Option
m³/h	kW	kW	kW
400	2530	800	1.1
500	3165	1,000	1.1
600	3800	1,200	1.3
800	5060	1,600	1.3
1000	6330	2,000	2.5