Innovative ignition technology and analysis for the combustion environment

Technews Industry Guide: Maintenance, Reliability & Asset Optimisation 2019 Analytical Instrumentation & Environmental Monitoring

Ignition systems

Firing up large industrial combustion plants with many burners is a complex process requiring equipment such as igniters that require gas or oil to establish the combustion process. OEN Enterprises just made things easier with the introduction of the new Hegwein Microwave Plasma Ignition System.

This ignitor generates a bright white plasma at a temperature in excess of 3500 degrees Celsius. Once introduced into the boiler, it directly ignites fuels and pulverised solids like coal-sand biomass. It is also able to ignite gaseous and liquid fuels in combustion applications across industries. No additional ignition fuels are required, allowing instantaneous and reliable direct ignition of hard coal burners. This enables higher boiler system availability and improved flexibility of load control, resulting in more efficient energy usage.

An alternative ignition product that OEN offers is the Durag D-HG series, a high energy spark ignition system (HESI). It has an integrated temperature control, under and over voltage protection, discharge control, short circuit test, LED indication for ignition feedback, ready for operation signal and a built-in fault finding capability. The system produces an energy of 5,6 J at a maximum ignition frequency of 20 sparks per second and is fully programmable to suit specific plant requirements. It has varying ignition lance lengths to suit plant specifications, and a retraction unit is also available.

Flame monitors and analysers

To evaluate the characteristics of the flame produced, the Durag D-LX 201 range of flame monitors provide fail-safe functionality. As the D-LX 201 is burner and flame specific, it measures the electromagnetic radiation in the ultraviolet, visible and infrared region of the flame spectrum and analyses parameters such as intensity, frequency, flicker and the stability of the flame. These measurement criteria need to be fulfilled in order for the D-LX 201 flame monitor to indicate that there is a flame, as well as provide a valid ‘Flame On signal. There is also a RS-485 output available that can be used for diagnostics, or as an output to the appropriate Durag software.

OEN also supplies the WDG-VC Oxygen and combustibles analyser, which can be used by all companies that need to monitor boiler efficiency as well as control their stack emissions. The principle of operation is based on a Zirconium oxide cell for net oxygen measurement, and dual hot-wire catalytic detectors for both combustibles and methane.

For more information contact Chesney Brady, OEN Enterprises, +27 11 675 4447, [email protected], www.oen.co.za

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