EcoSorb™ Advanced Dry Scrubbing Solutions
Low-cost Dry Scrubbing Systems
Design Benefits
• Sodium and Calcium based systems
• Simultaneous removal of SOX, HCl, HF and other acid gases
• Improves filtration for enhanced PM 2.5 removal
• Condenses PM 2.5
• Add-on oxidizer or SNCR/SCR for Hg and NOx removal
• Sodium and Calcium based systems
• Simultaneous removal of SOX, HCl, HF and other acid gases
• Improves filtration for enhanced PM 2.5 removal
• Condenses PM 2.5
• Add-on oxidizer or SNCR/SCR for Hg and NOx removal
Available Sodium-Based Systems
• Double and single pass reactors achieve 99.95% on SO2
• Utilizes micronized Sodium Bicarbonate in once-through mode
• Reactor system is coupled to a fabric filter
• Can be used without a reactor prior to fabric filter
Available Calcium-Based Systems
• CDS - Upflow reactor coupled to fabric filter
• Utilizes standard hydrated lime in recycle mode
• TFB - GCT coupled to an upflow reactor prior to fabric filter
• Utilizes micronized hydrated lime in once-through mode
EcoSorb™ Advanced Flue Gas Scrubbing System
EcoSorb™ CFB Circulating Dry Scrubber
EcoSorb™ TFB Once-through Dry Scrubber
Two of Several EcoSorb™ Advanced Gas Dry Scrubbing System Arrangement Layouts
EcoSorb™ Acid Gas Dry Scrubbing Systems
Advanced Scrubbing Systems
BoldEco Environment possesses a great deal of experience in the design and supply of wet, dry and hybrid semi-dry scrubbing systems.
BoldEco Environment has been applying conventional wet, dry and semi-dry scrubbing technology for years now, and has recently developed patented SO2 scrubbing technology for the following markets:
POWER
INCINERATION
CEMENT
LIME
GLASS
- ES-SBC Sodium Bicarbonate DeSOX Dry Scrubber
- ES-CFB Dry Lime DeSOX Scrubber
- ES-TFB Dry Lime DeSOX Scrubber
- ES-SDA Semi-Dry Lime DeSOX Scrubber
- ES-LEC Dry Limestone DeSOX Scrubber
In the LEC process, hot flue gas is introduced into a dry SO2 reactor, where it is forced into intimate contact with a bed of 1-8 mm diameter limestone granules covered with a film of water. As the gases pass through the bed, the SO2 is absorbed into the water film and reacts with the limestone to form primarily Calcium Sulfite and, to some degree, Calcium Sulfate on the surface of the granule. At the end of the process, the surface of the dried granules is regenerated to expose fresh limestone. The reactivated limestone granules are recycled back into the LEC reactor where they are mixed with a small amount of make-up limestone granules.
The granules that form the reaction bed are readily available from any quarrying facility worldwide and are typically 90% free calcium carbonate or better grade limestone. The reaction by-product is a dry waste stream that can be employed in a variety of uses.
Benefits of the LEC System
Lowest Installed Cost
The US Department of Energy (DOE), the Tennessee Valley Authority (TVA), and Babcock and Wilcox (B&W), all were impressed with the low cost and with the high efficiency of the LEC.
Lowest Operating Cost
The LEC process and conventional limestone scrubbing have been compared on an equitable basis using flue gas conditions that would be expected at the outlet of the dust collector (typically an electrostatic precipitator, or ESP) on a 500 MW coal-fired boiler. The comparison was done by a government agency and compared it against various technologies, finding the LEC technology far less costly to operate than even the nearest competitor. The cost estimates were carried out in US dollars per ton of SO2 removed and based on burning 4% sulfur coal.
Extremely Retrofittable
Easily adapted to existing installations
Small footprint makes it easy to find location in process
High efficiency even with low SO2 concentrations
Short installation and commissioning time requirements
BACT Performance
Demonstrated SO2 removal efficiency between 90 and 99%
Operational Simplicity
Few moving parts, simple to operate
Low Energy Consumption
Lowest energy consumption of all limestone scrubbing systems
Operational Advantages
Utilizes raw limestone, an inexpensive and safe material
Rocks in – rocks out process
Produces gypsum, a safe and valuable by-product
Utilizes 80% less water than conventional wet scrubbers
Design Flexibility
LEC technology is flexible in design and fit in a small footprint when compared to alternative technologies. This is accomplished by packing the maximum number of limestone beds and inlet and outlet gas paths in a given volume, while maintaining key design parameters (gas velocity, limestone wetness, bed speed, etc.).
Single Reactor EcoSorb™ Circulating Dry Scrubber on
a Municipal Waste Thermal Processor
Detail of a Single Reactor EcoSorb™
Circulating Dry Scrubber
EcoSorb Air Pollution Control Systems for Hazardous Waste Incineration Plants