Combination Semi-Dry & Wet Acid Gas
Amerair combines and utilizes its semi-dry and wet scrubbing capabilities and experience to provide a highly efficient acid gas scrubbing system without the extreme complexity and expense of large wet limestone scrubbing systems. This technology and know-how can be extremely valuable when considering sulfur dioxide generation associated with high sulfur coal combustion where SO2 scrubbing efficiencies of 95-99%+ are required.
This system design approach is highly applicable and worthy of serious consideration when combustion gas flows are less than 1,000,000 ACFM. This system design provides even better removal efficiencies for hydrogen chloride and hydrogen fluoride. The benefits offered by this system design approach are:
- Higher acid gas removal efficiency than that of conventional dry or semi-dry systems
- Zero liquid effluent discharge from system
- Simplicity of system operation
- No complex slurry clarification and water treatment requirements
- Economical capital cost of system
- Competitive operating cost of system
The combination of a semi-dry acid gas scrubbing system utilizing a dual fluid spray dryer upstream of the baghouse and a packed tower scrubber downstream can provide extraordinary removal efficiencies for sulfur dioxide, hydrogen chloride and fluoride without the necessity of any liquid discharge from the total system.
Sixty Five Megawatt Utility Power Boiler Baghouse designed to filter 225,000 ACFM at 325°F. The eight module baghouse incorporates long bag cleaning technology and penthouse plenum top removal door system for ease of maintenance. The flue gas filtered is generated from the circulated fluid bed combustion of various blends of low to medium sulfur coal. The filter media is laminated with a PTFE membrane to provide very low outlet emissions.