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Reliable gas analysis keeps down EfW operational costs

Gas analyser

FCC Environment has seen operational efficiency and cost savings at its energy-from-waste plant in Nottingham with the use of Siemens’ gas analyser solutions. Reliable control and measurement of gas emissions is also helping the company to meet its stringent environmental obligations.

Philip Eyre for FCC, said: “After initial discussions with Siemens, it became clear that they could offer analyser technology to ensure we remained compliant with our legislative responsibilities.

“In particular, the LDS6 laser gas analyser measures emissions during the process rather than at the end, which meant we could undertake pre-emptive actions on the gas cleaning procedures we have to take to meet cleaner emission targets.

“We have to ‘scrub’ the gases by introducing abatement or neutralising media. The incineration process creates sulphur dioxide and hydro-chloric acid gases and we use lime and bicarbonate of soda to perform the cleaning function.  

“The consumption of lime is critical, and methods to ensure we use the optimum quantities have a direct impact on our day-to-day operating costs.”

The Siemens technology had to be capable of operating within the extremely aggressive conditions of the incineration process. High temperatures, dust and a corrosive atmosphere combine to produce a tough environment, so the LDS6 needed to perform analysis consistently under these difficult conditions.

Shawn Pullman, product manager for laser and CGA at Siemens UK & Ireland, said: “We designed a period back purge on the extractive gas analyser due to the high dust content. And the specification of a tuneable diode laser analyser offering realtime measurement for the hydrochloric acid gas, which is hard to measure, could be handled within the concentration levels that are experienced on-site.”

www.siemens.com

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