36 Air Monitoring
Rugged Multi-Point Flow Meter Supports Clean-Coal Electric Power Generation
Process engineers at coal fired electric power plants will find the rugged MT91 Multi-Point Mass Flow Meter from Fluid Components International (FCI) (USA) delivers precision air/gas flow measurement with a highly intelligent flow sensor array packaged in a device that operates at temperatures up to 850°F (454°C) while helping to minimize the effects of carbon dioxide (CO2
) and other hydrocarbon- based greenhouse gases.
In electric power plants utilizing Power River Basin clean-burning low-sulfur coal, hot air, fuel gas, process gas and waste gas flow mixtures must be continuously monitored, controlled, treated and reported to ensure process efficiency and meet government clean air requirements. The MT91 Air/Gas Flow Meter’s multi-point design provides highly precise flow measurement to support the optimisation
of air/gas mixtures in coal-fired power plants and other industrial processes for air pre-heater lines, air combustion processes and stack waste gas treatment of NOx
, SO2 , CO and others.
The combination of FCI’s precision no-moving parts thermal mass flow sensor technology and its chromium carbide coated sensor assembly delivers superior flow measurement reliability with virtually no maintenance over years of service for an exceptionally low life-cycle cost. The MT91 is available with accuracy to ±2% of reading with repeatability of ±0.5% of reading, including operation in high temperature environments up to 850ºF (454°C) in large line sizes greater than 24 inches.
Reader Reply Card no 129
Further Endorsements for PCME’s Particulate Emission Monitoring Range
PCME’s (UK) product leadership in the field of particulate and dust emission monitoring has received a further endorsement with the approval of the DT991 Electrodynamic probe electrification AMS to EN 15267-3, the new European Standard for the certification of AMS to QAL1 for EN-14181. This is the first probe electrification type instrument to receive such an approval in Europe.
EN-15267-3 has recently been adopted in the
performance standard for MCERTS (as defined in Version 3) and forms the performance standards for QAL 1 instruments. In addition, PCME’s LMS181 has also passed this standard (EN 15267-3) and has also achieved a QAL1 which is consistent with MCERTS Version 3, Category 1.
PCME is in the process of converting these two EN-15627- 3 approvals into MCERTS approvals according to the latest Version 3 of the MCERTS performance standards for CEMS.
Reader Reply Card no 130 New Oxygen Analyser
Offering an exceptional range of industry-standard options and three unique, ground-breaking functions, the forthcoming SERVOTOUGH-Oxy oxygen gas analyser from Servomex (UK) will set new standards of flexibility, stability and reliability from a single, cost-effective unit. The Oxy builds on the success of the 1900 series by providing the same measurement advantages and a series of new and enhanced operation functions that maximises flexibility of configuration and application of use. As well as fault and calibration histories, all units offer NAMUR-compliant relay
functions, allowing two concentration alarm levels and maintenance required, service in progress and instrument fault messages to be communicated remotely. A comprehensive Modbus protocol allows remote communication and interrogation of the unit as standard via RS485, as well as an option for Ethernet connectivity. Autovalidation and autocalibration functions allow users complete flexibility for unmanned or remote operation, or to generate maintenance and reliability schedules using trending information. Stainless steel pipe work, automatic range change, fixed background gas compensation and measurement filtration are also now included as standard.
The Oxy introduces three unique options designed and implemented by Servomex that not only greatly raises the
standard for comparable units, but offers the potential for cost savings in installation and operational performance. An innovative, fully heated sample compartment removes the requirement for a sampling conditioning system on all samples with a dew point of up to 50 degrees centigrade. Responsible for up to 80% of failures in comparable units, sample conditioning failure is a major cause of unplanned downtime. The heated sample compartment design reduces this risk of downtime by the removal of coolers, dryers and other conditioning devices. This design improves operational cost as well as initial system and integration costs, making it especially ideal for use where ‘wet’ gases are to be measured. The final major innovation of the Oxy is the creation of an integrated pressure compensation system that not only compensates for barometric pressure but also for back pressure variations from flare stacks, enabling emission compliance targets to be easily met. Both the flow sensor and pressure compensation system technologies report via the instrument’s standard communication options, providing all measurement and safety benefits without the need to install additional devices and cost-hungry cabling.
The Oxy therefore offers a total oxygen solution that can be configured to the requirements of a wide range of applications. Potential applications include usage in process control, safety critical oxidation such as ethylene oxide and propylene oxide, flare stack analysis, product purity, feedstock clean-up and inerting or blanketing.
Reader Reply Card no 132 October/November 2008 AET
TCR Tecora (Italy) introduces in its Emission line an innovative product: the Multistage Stack Impactor (MSSI). MSSI is designed to facilitate the sampling in industrial stack emission, where dust is present in low concentration, there is a large mass emissions and size classification is required. All these conditions are the perfect case for the isokinetic sampling with MSSI impactor.
MSSI is designed to meet the requirements of EN 13284- 1 and VDI 2066 § 10. A typical example of MSSI application
is emission with a concentration below 50 mg/m3. The dust measurement is realized with a gravimetric system: a given volume of flue gas is sucked through a filter, the dust is captured on the filter and then the filter is weighted in laboratory before and after the sampling test, to evaluate the weight difference. According to the sampling method available, we may consider 3 approaches: 1) integrated isokinetic heated probe; 2) PM10 and PM2.5 Cyclones; 3) sampling with multistage impactor.
The isokinetic probe is a well tested method, but doesn’t allow particle sizing. Cyclones are a well tested method, but part of the sample cannot be collected on the filters and gets lost. The probe with the multistage impactor MSSI, with low dust concentration, guarantees the maximum collection of dust in different sizing as PM10 and PM2.5. The dust enters the impactor, is accelerated at high speed and hits against the filter membrane due to its inertia. In this way, the dust remains bind to the filter to avoid any sample loss in the next analysis process.
Multistage Stack Impactor
Reader Reply Card no 131
Emissions Trading Theme for MCERTS 2009
Presentations at the MCERTS 2009 Conference will address emissions trading in addition to the provision of an update on MCERTS and the regulations which relate to air quality and emissions monitoring.
High profile speakers from the Environment Agency, NPL, UKAS and AEAT will speak on subjects including emissions trading, the Environment Agency's Modern Regulation programme and its impact on monitoring, the role of MCERTS and OMA in delivering the programme and how, in 2010, EN14181 - Quality Assurance for an automated monitoring system, will operate under the UKAS accreditation. MCERTS 2009 will run over two days, 29 and 30th April, at the Bretby Conference Centre near Burton on Trent and will adopt a similar format to previous events with an Exhibition featuring almost all of the world's leading suppliers and a wide range of workshops delivering practical help and advice on issues relating to the monitoring of emissions to air.
The organisers have reported that exhibition stands
for MCERTS 2009 are almost all sold. For more information, please visit
www.mcerts.uk.com
Reader Reply Card no 133
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