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:

Ensuring occupational health and safety in mining
Analytical Instrumentation & Environmental Monitoring
Probe Integrated Mining Technologies (Probe IMT) has partnered with M3SH Technology to offer state-of-the-art environmental monitoring solutions that address these dual requirements.

Read more...

---

Sustainability of surface water
Endress+Hauser South Africa Analytical Instrumentation & Environmental Monitoring
The sustainability of surface water is critical for South Africa’s economic development, social well-being and environmental health. Endress+Hauser has a full range of liquid analysis sensors and transmitters to measure important parameters and has an excellent global track record in water and wastewater process plants and various surface and industrial water monitoring sites.

Read more...

---

Keeping an eye on invisible radiation
Omniflex Remote Monitoring Specialists Analytical Instrumentation & Environmental Monitoring
At its peak in 1994, the energy generation capacity of the UK’s nuclear power stations was 12,7 GW across 16 plants. In 2024, the capacity has fallen to around 5 GW, and the number of stations is down to nine. However, this is far from the end of the story as spent nuclear fuel remains radioactive for centuries, and requires rigorous safety processes to safeguard against leaks.

Read more...

---

Effective dust control in sugar processing
Analytical Instrumentation & Environmental Monitoring
BLT WORLD specialists work in conjunction with the global ScrapeTec team to offer dependable solutions for specific problems at the transfer points of conveyor systems in many industries where dust and material spillage are concerns, including the sugar sector.

Read more...

---

A benchmark for lubricant reliability in mining
Analytical Instrumentation & Environmental Monitoring
According to Craig FitzGerald from ISO-Reliability Partners, mines can save R500 000 or more on their yearly mill cleaning costs, while electricity consumption can be reduced by up to 12%, and lubricant consumption lowered up by up to 60% when using Bel-Ray Clear Gear lubricant.

Read more...

---

Safeguarding precision in industrial radiometric measurements
Mecosa Analytical Instrumentation & Environmental Monitoring
In the complex landscape of industrial plant operations, precision is paramount, especially when it comes to weld inspections to test for structural integrity of pipes. Berthold has the ideal answer to this challenge – X-Ray Interference Protection.

Read more...

---

New indoor air quality monitor
RS South Africa Analytical Instrumentation & Environmental Monitoring
RS South Africa has available a new indoor air quality (IAQ) monitor that provides continuous, easy-to-read, and accurate real-time monitoring of air quality in indoor environments.

Read more...

---

A quick guide to disinfection
Endress+Hauser South Africa Analytical Instrumentation & Environmental Monitoring
The distribution system in a drinking water network provides a reliable supply of high-quality water to consumers. Endress+Hauser’s range of robust, low-maintenance sensors are ideal for monitoring disinfectant levels in the water.

Read more...

---

Multi-parameter measuring system for water quality monitoring
KROHNE Analytical Instrumentation & Environmental Monitoring
Monitoring different parameters in water treatment processes can lead to a situation where different measuring points are scattered across the plant.

Read more...

---

Optimising energy consumption in the chemical industry
Anton Paar Analytical Instrumentation & Environmental Monitoring
To optimise energy consumption and save valuable resources on chemical process plants, operators have to continuously measure parameters such as concentration, raw density, sound velocity and refractive index. With Anton Paar’s wide product range, the process application team has many options for cutting-edge laboratory measurement technologies, and can develop tailor-made mathematical models for every application.

Read more...

---