As air regulations continue to become more stringent, industries are faced with compliance requirements to maintain their existing operating permits. Dry Sorbent Injection (DSI) technology has proven its effectiveness for over 20 years controlling SO2, SO3, HCL, HF and Mercury. As a low capital cost technology with a short implementation schedule, DSI technology will not only help industries and manufactures comply with new requirements but also meet compliance deadlines. Several sectors such as utilities, cement, and institutional facilities have implemented DSI systems and continue to operate. More recent interest in the technology as a compliance strategy has moved to the oil and gas, building products, metals recycling and lime and minerals sectors.
COMMON SORBENTS INJECTED in DSI SYSTEMS
At Nol-Tec Systems, we are aware of the distinct features of all sorbent materials utilized in DSI systems that affect the quality and suitability for varying pollutants within the gas stream. Effective and ideal utilization of the sorbent requires several material handling considerations, truck or rail unloading, milling, storage, moisture control, silo unloading, temperature control, flowability, aeration, splitting, and dispersion. Additionally, the successful operation and performance of a DSI system will not only help the industry maintain compliance but will also be a major contributor in the worldwide effort to deliver on climate change objectives. We assist customers in implementing DSI systems safely, effectively, and sustainably.
Materials
Equipment and Design Considerations
DUST CONTROL
The side entry bin vent effectively filters dust laden air as sorbents are off loaded from trucks or railcars to a receiving silo. Air used to pneumatically covey the sorbents to the silo is removed and filtered through the bin vent. The bin vent will pulse and the collected dust will drop into the silo.
electrical & Controls – System integration
Likely the most critical consideration for a DSI system is the electrical and controls design. Nol-Tec provides complete integrated systems from power and distribution to finite instrumentation and automated control. Our on-site panel shop provides assembly and testing to ensure compatibility with the desired system operations.
KEEP SORBENTS MOVING WITH SILO FLUIDIZATION
Designed to fluidize dry materials in either pneumatic transporters or atmospheric bins. Standard features include three air injection valve assemblies controlled by one solenoid valve, a ceramic valve seat that directs air into the material at various angles, abrasion-resistant urethane valve seal, wear parts that are replaceable from outside of the vessel, and controllable pressure and volume of air.
DELIVERING THE CORRECT AMOUNT OF SORBENT UNIFORMALY TO ALL LANCES
In order to ensure optimum dispersion of sorbent into the gas stream, the sorbent must first be uniformly delivered to each injection lance. Nol-Tec’s resistive splitter ensures accurate sorbent dispersion to all lances providing efficient removal of pollutants in the gas stream.
Resources
LIME KILN MACT COMPLIANCE TECHNOLOGY
Dry sorbent injection (DSI) removes HCl and other acid gases using a powdered alkali sorbent injected into the exhaust gas ductwork where it then reacts with the HCl in the exhaust stream.
FLUIDIZING BIN BOTTOM
The Nol-Tec fluidizing bin bottom promotes the free flow of powdered or granular materials in storage vessels.
RESISTIVE SPLITTER
Nol-Tec’s resistive splitter creates uniform dispersion for efficient pollutant removal.
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