Sturtevant uses particle analyzer for optimal sorbent milling | Automation.com

Sturtevant uses particle analyzer for optimal sorbent milling

Sturtevant uses particle analyzer for optimal sorbent milling
July 2, 2009 - Sturtevant, a manufacturer of material processing equipment, is using an Insitec on-line particle size analyzer from Malvern Instruments to tailor solutions for specific customer applications. A particular success is the development of an optimized mill for processing Trona, a reactive sorbent for the removal of harmful pollutants from flue gas. The installed solution provides effective pollution abatement at competitive cost.

“For us, on-line particle size analysis provides maximum process insight with minimal manual input,” said Steve Coulombe, Product Manager from Sturtevant. “This knowledge accelerates and improves product and process optimization allowing us to provide an even better service to customers. The solution developed for Trona milling is a great example of what can be achieved and has great potential towards becoming a standard within the power plant industry.”

Injecting Trona (sodium sesquircarbonate) directly into a flue gas stream removes sulphur trioxide ahead of desulphurisation, reducing the likelihood of ‘blue plumes’ and decreasing levels of acid rain. At-plant trials with a Simpactor 6HD impact mill and an Insitec on-line particle size analyzer, show that the mill can successfully handle feeds of varying coarseness, producing a consistently fine material that minimises injection levels. Low levels of spent sorbent in the fly ash waste permit its incorporation in cement making the stream a saleable by-product, or reduce waste disposal costs otherwise.

“Trials at the power plant were extremely successful,” remarks Alon Vaisman, the expert who led the trial from the Malvern side. “With on-line particle size analysis in place the customer could see how the process was performing in real-time and the consistency of the product. The developed solution is excellent since it minimizes both emissions and operating costs.”

The Insitec is a laser diffraction system for the on or in-line measurement of particles in the size range 0.1 to 1000 microns. Capable of delivering four complete particle size distributions per second it can track even rapidly changing processes in real time, providing a data stream for optimal process control. Fully automated analysis from sample extraction through to measurement minimises manual input.

About Malvern Instruments
Malvern Instruments provides a range of complementary materials characterization tools that deliver inter-related measurements reflecting the complexities of particulates and disperse systems, nanomaterials and macromolecules. Analytical instruments from Malvern are used in the characterization of a wide variety of materials, from industrial bulk powders to nanomaterials and delicate macromolecules. A broad portfolio of innovative technologies is combined with intelligent, user-friendly software.

Headquartered in Malvern, UK, Malvern Instruments has subsidiary organizations in all major European markets, North America, China, Korea and Japan, a joint venture in India, a global distributor network and applications laboratories around the world.

About Sturtevant Inc.
Headquartered in Massachusetts, USA, Sturtevant Inc. is a family-owned manufacturer of material processing equipment including crushers, fine grinders and air classifiers. Since 1883, the company has provided processing solutions to the chemical, pharmaceutical, food and mineral powder processing industries worldwide. Sturtevant offers a full line of size reduction equipment. From large coarse particle crushers to a patented sub-micron Micronizer, Sturtevant custom engineers units suited to the widest range of applications. If an operation requires particle separation through air classification, Sturtevant produces three different kinds of air classifier systems.

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