Dry Sorbent

Industrial Environmental Applications

Dry Sorbent Injection (DSI) for Flue Gas Desulphurization (FGD) of Industrial Stack Emissions

Equipment & Technology Offered: Bulk Storage Silos (Welded or Bolted) Pneumatic Conveying (Rotary Valves or Eductors) Loss in Weight Feeders for Metering Reagents Injection Manifolds and Lances PLC based Electrical Control Systems
Photo: Dry Lime Injection for Cement Kiln Flue Gas Desulphurisation

An example of a successful technique for Flue Gas Desulphurization (FGD) of stack emissions, is the Dry Sorbent Injection (DSI) of chemical reagents into the stack hot gas flow.

Typically, Lime, Carbon, and Soda Ash (TRONA®) are the reagents used for Sulphur and Mercury emission control. The emissions from the stack are reduced by the chemical reaction between the reagents and the contaminants in the flue gas flow. These chemical reactions target the harmful elements and convert them into a by-product that can be recovered from the hot gas flow before the gas exits the facility stack.

Dilute Phase Pneumatic Conveying and bulk storage systems utilize rotary valves or eductors to feed the reagent materials from a loss in weight feeder into the distribution manifold of the hot gas ductwork where the chemical reactions are completed.

In order for these types of installations to be successful, it is critical that the correct equipment design be considered based on the bulk handling and reagent flow characteristics of the various grades and supplier brands for these chemical reagents. Expertise for these types of systems is only acquired through experience with the various reagent materials over a broad range of operating conditions.