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Selective Catalytic Reduction (SCR)

As with the SNCR process, SCR involves injecting either an ammonia or urea based reducing agent into the flue gas of a combustion source of an industrial source. The main difference with SCR is that a catalyst is used, which accelerates the chemical reaction and allows it to occur at lower temperatures. The potential operating temperature range of the SCR process is 170°C to 550°C.

The SCR process is the most efficient proven technology for the reduction of Nitrogen Oxides (NOx) from industrial sources and Flowvision designed systems are capable of reducing NOx emissions by up to 96% while limiting the ammonia slip.

FlowVision SCR systems technology

A prerequisite for the SCR catalyst to achieve optimum performance is the proper design of the SCR DeNOx reactor and the systems for reagent injection and mixing.

The reagent Injection system of a Flowvision SCR system can be either by atomizing aqueous ammonia directly into the flue gas duct upstream of the catalyst together with the use of a Vortex Gas Mixer or by using an Ammonia Injection Grid (AIG) in front of the catalyst.

Flowvision is able to supply the complete SCR system on a turn-key basis. The turn-key package can include the reagent unloading & storage system, reagent control, injection and mixing system, as well as the mixing ducting, SCR reactor housing and flow rectification/straightening and mixing devices.

By including the SCR catalyst in the scope of supply, Flowvision is able to undertake a full process guarantee for the SCR system. This further insures that following the start-up and commissioning of the system, Flowvision can provide timely and effective support for the complete system.

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