More stringent environmental regulations require improved solutions for flue gases. GE offers a full set of dry or wet FGD service solutions to upgrade your equipment to a high-tech design with optimal performance.

The following solutions are available for the wet FGD. 

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Total Plant Solutions

SulfiTracTM Sulfite Analyzer

Our patented solution – a combination of hardware and software - provides real-time measurement and control of the sulfite concentration in the slurry. This solution reduces power consumption and needs for additive, allowing power operators to reduce their operation and maintenance costs while staying compliant. Designed to cope with harsh environments, our sulfite analyzer can be installed in the existing slurry slip stream with no need for an outage or process alteration, optimizing operating costs. Design is demonstrated to reduce mercury emissions, and provides improved treatability of FGD wastewater for mercury, selenium, and nitrates.

Spray Headers - Improved design for uniform flue gas coverage

The optimal alignment and distance between the spray headers and the nozzles enable a uniform distribution of the liquid (slurry) and the flue gas. GE’s design increases the gas / liquid contact and improves the SO2 removal efficiency at lower energy consumption.

Nozzle types - Optimal droplet diameter and dispersion

GE increases the efficiency of the SO2 absorption with the optimum design and location on the spray bank of the spray nozzles. Our hollow cone and bi-directional nozzles are positioned with computer modeling to achieve optimized gas to liquid contact, scrubbing efficiency and reduce gas sneakage. 

Mist Eliminator - Prevents droplets carry over at reduced pressure loss

GE’s modelling of the mist eliminators, spacing and orientation minimizes the droplet re-entrainment. Through extensive testing and experience, GE recommends the appropriate washing cycle that secures low pressure drop translating in energy savings and securing reliable operation.

Performance Enhancing Plates (PEP) - Increased gas to liquid contact

Improved gas distribution for each spray level and reduced risk for areas with high gas velocities at the scrubber wall can be achieved by upgrading with enhancing plates. The improved gas distribution will increase gas to liquid contact and result in more efficient SO2 removal.

TRAY AND ENHANCEMENT PLATE UPGRADES FOR SO2 AND PM REMOVAL

GE’s tray and enhancement plate designs improve the gas to liquid contact for treated flue gas. Both solutions offer improved SO2 and PM removal with limited system pressure drop increase.

SLURRY PREPARATION EQUIPMENT

GE’s overall process expertise and assessment of current operation conditions will confirm any tuning needs for lime and limestone slurry preparation. The quality of limestone and proper grinding level in the ball mill is very important for the most efficient SO2 removal. Reduced operating costs can be observed by improving performance of lime slackers for DFGD applications or by converting lime-only slurry systems to a recycle slurry system.