NEWS RELEASE                                                                                                    AUGUST 2014

Scrubber Market Veering From Hardware to Consumables

Dry scrubber capital investment will be just under $600 million in 2015. This is less than 10 percent of the total scrubber capital investment.  But behind these numbers is a new path for the industry. Dry scrubbing is a way to capture acid gases at lower capital cost than with absorbers.  However, purchasers face much higher reagent costs.  Limestone used in wet systems is a fraction of the $200/ton price of lime used in dry scrubbers.  These developments are tracked in the McIlvaine publication Scrubber/Adsorber/Biofilter World Markets.

($ Top of FormMillions)














 Dry   Scrubber






Sodium compounds are also used in both dry scrubbers and wet scrubbers. But the amount of sodium to reach 90 percent HCl or SO2 removal can be 50 percent higher with dry scrubbing or dry sorbent injection (DSI).

Dry sorbent injection in effect eliminates any scrubber capital cost.  The sorbent is injected into duct ahead of the particulate collector. It reacts with the acid gases to form compounds such as calcium chloride or calcium sulfate. These compounds are then captured in the particulate collector.

One new approach with lots of promise is catalytic filtration with DSI.  All the pollutants are captured at 850oF.  The hot clean gas can then be directed through an efficient heat exchanger and substantially improve process efficiency. Glass plants, biomass combustors and incinerators are all now successfully using this process.

This dry scrubber forecast is only for the industrial sector and excludes power plants. Also no forecast is give for DSI because the scrubber is eliminated.

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