The BACKGROUND
Because of ageing equipment and increasing issues surrounding reliability, one of Europe’s leading power suppliers replaced their continuous emission monitoring systems (CEMS) at two of their power station sites across the UK.
The CHALLENGE
1. To supply CEMS that complies with the large combustion plant directive (LCPD) and the industrial emissions directive (IED) and equipment that is MCERTS certified.
2. To include a system redundancy option at the power station to prevent any downtime
3. To monitor temperature, pressure and flow measurement and establish communications between the analysers and Data Acquisition & Reporting Software
4. The power station required the systems to be installed in the main exit flues (within one concrete windshield), at a height of 75 meters above ground level
5. The incumbent systems were not provided directly by a1-cbiss, therefore a1-cbiss would have to prove that their solution, service and support is superior suitable to the incumbent supplier.
The SOLUTION
a1-cbiss proposed an MCERTS accredited MIR9000 infrared multi-gas analyser that monitors extracted samples on a dry basis, using a SEC sample conditioning system.
The SEC sample conditioning system comprised of:
- An in-situ probe,
- A permeation dryer unit – Which eradicates the requirement for long lengths of heated line.
- And a temperature, pressure and flow module integrated into the same probe.
The MIR9000 system MCERTS accreditation is based on the Emission Limit Values (ELV) of the waste incineration directive, and subsequently future proofs the site for the ELV change when the IED comes into force.
“Using a single probe for measuring all of the required parameters consequently lowered the cost of installation”
The option for system redundancy was addressed by proposing a fully automated change-over system with an additional MIR9000 analyser. The system would be fully controlled by the CDAS software, therefore requiring minimal user intervention and eliminating any risk of downtime.
For the gas turbine site, a1-cbiss proposed MIR9000 CLD chemiluminescence and infrared multi-gas analysers. MIR9000 CLD monitors extracted samples on a dry basis, using a SEC sample conditioning system.
The SEC sample conditioning system is comprised of the same elements as used in the MIR9000 system. The CLD system fully complies with the standard reference method (SRM) EN 14792 for the measurement of NOx.
The CLD also has MCERTS certification that complies with the new limits in the IED.
Service & support is integral to the a1-cbiss offering. With the largest service network in the industry providing nationwide coverage, the dedicated team of service engineers provide service, repair & maintenance on all equipment supplied.
The RESULT
a1-cbiss manage all aspects of the project from design & build, installation & commissioning, through to ongoing service & support.
The power station saw the installation of nine MIR9000 multi-gas MCERTS accredited analysers comprising of four duty MIR9000 systems and 1 standby MIR9000 with a changeover system for redundancy.
The analysers are integrated into a purpose-built enclosure, all communicating via the MCERTS certified CBISS Elite Data Acquisition & Reporting software (CDAS) which also incorporates the IVIS hardware panel allowing for QAL 3 functionality.
Seven MIR9000 CLD multi-gas analysers were installed at the gas turbine site in the purpose-built enclosure. The enclosure also incorporates the IVIS hardware panel allowing for QAL 3 functionality. All communicating via the MCERTS certified CBISS Elite Data Acquisition & Reporting software (CDAS).
What did the client say?
“a1-cbiss undertook the project with professionalism and dedication. They produced the conceptual design, project managed and delivered the installation, all ahead of schedule.
Resources were flexible & accommodating to opportunities that aligned with station generation.
a1-cbiss now provide us with a totally integrated maintenance & software support package.”
