Mass emission analyser suits smelters
November 2007
Analytical Instrumentation & Environmental Monitoring
Air pollution regulations restrict the allowable stack emissions from various industrial facilities. Often, a facility will need to measure and report the emissions of multiple pollutants being emitted by their process. Under many compliance regulations, it is not adequate to simply know the concentration of these pollutants in the stack gas emissions. Often, a facility is required to monitor and report the individual mass emissions (eg, lb/hr, kg/day, etc) of their processes.
In order to accurately monitor mass emissions, an analyser must be capable of accurately and reliably measuring the various pollutants of interest while simultaneously measuring the stack gas velocity. This feat is made all the more difficult as the stack gas is typically hot, saturated with moisture, and dirty.
Ametek's 910 mass emission analyser uses the 920 stack gas analyser for the analysis of SO2 and is suitable for use on smelter stacks. It maintains the sample above the water dew point and analyses on a hot/wet basis. An important fact is that the velocity/flow is measured on an in situ hot/wet basis, and as the mass emission is a product of these two values, the measurement base must be the same.
This method of extractive analysis is commonly referred to as hot/wet analysis. That is, the sample is extracted from the process and kept above the sample dew point throughout the sample transport and analysis. There is no dilution or drying of the sample, keeping the sample above the dew point not only refers to water but also to acid dew points, the sample system is capable of maintaining a sample temperature of up to 180°C or removing the acid at the SCU. This means sample integrity is maintained and any plugging or fouling is minimised.
The 900 Series analysers use hollow cathode lamps, which emit characteristic lines of UV radiation. The positions of these lines are determined by the cathode metal, their wavelength centres being known to a high degree of accuracy. Since these bands are extremely narrow, they facilitate excellent linearity, accuracy and precision in absorbance measurements, independent of variations in bandpass filtering.
Separate reference and measurement paths are part of the photometer design. Light from the source lamp is split into two separate beams through the use of a beam splitter. One beam passes through clean air, the other through the gas sample. Both beams impinge on separate PMTs (reference and measure).
The unique sample cell design made of stainless steel and utilising a folded path configuration, provides for the photometer to be mounted outside of the oven in the electronics cabinet. At one end of the sample cell, a reflector block returns the photometer illumination back to the detector section through a thermal isolation tube.
For more information contact Noel Bauchop, OEN Enterprises, +27 (0)11 675 4447, [email protected], www.oenenterprises.co.za
Further reading:
High-precision measurement of insulating gases
Analytical Instrumentation & Environmental Monitoring
WIKA has launched the next generation of its GA11 gas analyser. It enables switchgear operators, manufacturers and maintenance companies to record the quality of SF6 gas and alternative insulating gases.
Read more...
Say goodbye to missed contamination with real-time colour monitoring
Analytical Instrumentation & Environmental Monitoring
Applied Analytics offers seamless and rapid colour monitoring in processes with an industry-proven analyser that quickly and accurately monitors colour in your sample stream for impurities and inconsistencies.
Read more...
Metrology laboratory is the heart of data-driven production consistency
Analytical Instrumentation & Environmental Monitoring
Pressing and welding have been at the core of Tier 1 automotive supplier, Malben Engineering for 50 years; but it is the company’s investment in its state-of-the-art metrology laboratory which has set it apart.
Read more...
Unlocking precision: The future of inline concentration measurement
Analytical Instrumentation & Environmental Monitoring
[Sponsored] In today’s resource-conscious industrial world, manufacturers are under growing pressure to optimise productivity, ensure consistent product quality and minimise waste. One of the most effective levers for achieving these goals lies in mastering concentration measurement, and Anton Paar is redefining how it is done.
Read more...
High-precision measurement of insulating gases
WIKA Instruments
Analytical Instrumentation & Environmental Monitoring
WIKA has launched the next generation of its GA11 gas analyser. It enables switchgear operators, manufacturers and maintenance companies to record the quality of SF6 gas and alternative insulating gases.
Read more...
Smart sensors for cleaner, safer food and beverage processes
Instek Control
Analytical Instrumentation & Environmental Monitoring
Instek Control specialises in advanced measurement solutions tailored for the food, beverage, pharmaceutical and mining industries. Among the company’s offerings are advanced process sensors from Anderson-Negele, as well as ALVIM biofilm monitoring technology.
Read more...
Elevating mining separation processes through precision instrumentation
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
In mining operations, the quest for efficiency and productivity is key. There is an urgent need for innovative solutions to enhance the performance of extraction processes while balancing operational costs and environmental impact.
Read more...
Alfa Laval launches next generation
Analytical Instrumentation & Environmental Monitoring
Alfa Laval has launched Clariot, a next generation, AI-based condition monitoring solution, precision-built for hygienic process equipment to deliver more accurate analysis and support.
Read more...
The next generation in metal sorting
Mecosa
Analytical Instrumentation & Environmental Monitoring
In the metal recycling industry, companies are increasingly challenged to not only improve the efficiency of their processes but also to raise the quality and purity of the sorted materials to new levels. By integrating proven spectral analysis technology into its market-leading REDWAVE XRF sorting system, REDWAVE is unlocking new opportunities for metal recycling, particularly in aluminium recovery.
Read more...
Ensuring clean and safe water
Endress+Hauser South Africa
Analytical Instrumentation & Environmental Monitoring
Endress+Hauser’s comprehensive range of disinfection sensors are designed to monitor and control disinfectant levels in water treatment processes.
Read more...
printer friendly version