Transcript PowerPoint Presentation - MicroMist Scrubber Technology

MicroMistTM
Wet Scrubber
Advanced Scrubbing Technology
Ultra-High Efficiency
Fossil Fuel Pollutant Capture
The
MicroMist™
Scrubber
Benefits of MicroMistTM
Scrubbing Technology
• Lower Energy Consumption -
MicroMist System Typically Operates With Less Than
25” W.C. of Total Pressure Drop
• Lower Equipment Costs than Standard Scrubbing
• High Capture Efficiencies on Acid Gasses &
Submicron Particulate
• High Capture Efficiencies on Condensable Compounds
• Retrofits on Existing Equipment = Minimal Down Time
• Proven Results!
What’s Different?
• Sequence of Scrubbing “Events”
• Quenching and Sub-Cooling
• Patented System Employing Fine Droplets
• Uses Proprietary Dual-Nozzle Contact Trays,
High Efficiency Mist Eliminators with Irrigation
• Lower System Pressure Drop Affects the Ability to
Scrub Fine Particulate, Acid Gases, and Heavy Metals
in “One System”
• Water Management and Experience
• High Flexibility for Varying Gas Flow
DIRTY
SCRUBBER
EXHAUST
Conventional Scrubbers
PROCESS
EHAUST
•Low Particulate Collection
Efficiency
•Inefficient Energy Use
(>70” W.C.)
WATER
SEPARATOR
STAGE
•Atomization of Particulate
Collection Affects Draft
•Poor Turn-Down
VENTURI
STAGE
•Little Effect on
Condensable Compounds
SATURATED
GASSES
•Difficult Solids Control
DRAIN
DRAIN
Flue
Gas
Clean
Gas
MicroMistTM
Scrubber
•High Particulate Collection Efficiency
(>99.5%)
•High Capture Efficiency of Acids &
Condensable Compounds (>98.9%)
•High Capture Efficiency of Heavy Metals
(95% - 99% + )
•Energy Efficient (System ∆P <25” WC)
•Atomization for Particulate Collection
Independent of Draft
•Excellent Turn-Down
•Superior Solids Control
& Segregation
Stage 1: Quench
Flue
Gas
Clean
Gas
1
MicroMistTM
Scrubber Elements
• Quenching Upstream
of True Venturi Tubes
• 95% Particulate Removal
• Removal of SO2 & HcL
• Separation of Drain Water
•< 1” WC Pressure Drop
Stage 2: Sub-Cooling
Flue
Gas
Clean
Gas
2
MicroMistTM
Scrubber Elements
• Conditioning
• Agglomeration
• Absorption of acid gasses
• Removal of SO2 & HCL
and PM > 1 micron
Flue
Gas
Clean
Gas
3
MicroMistTM
Scrubber Elements
Stage 3: Patented
True Venturi Stage
• Condensation and Agglomeration of
H2SO4, Fumes and Sub-Micron
Particulate
• Internal Throat Atomizer Controls
Differential Pressure With Varying
Process Loads (Control to ~16” WC)
• Correct Droplet Atomization
for Maximum Collection Efficiency
• Venturi Design Achieves Multi-Stage
Liquid/Particle Differential Velocities
for Sub- Micron collection
• Separate Drain for Maximum
Liquor Management
& Ph Control
Gases and Submicr on Par ticul ate
100
86
velocity (%)
Col lection Droplets
ga se s p ass ing
th rou gh dro ple ts
71
57
dr opl ets pas sin g
th rou gh gas es
43
29
14
Dim e ns ion along Ve ntur i Ele m e nt - units
0
VENTURI THROAT
0
1
2
RECOVERY CONE
3
4
5
6
Venturi Tubes are “Ideal” Design Incorporating Maximum
Particle/Droplet Collisions & Pressure Recovery
Patented MicroMistTM Venturi Stage
Vertical Centrifugal Pumps
Atomization Through HydroMist Nozzles
at the Inlet of Each Venturi Tube and
Independent of Throat Velocity.
Internal Throat Atomizer Modulates
(Pump VFD) To Maintain Specified
Pressure Drop Across This Stage
Stage 4: Separation
Flue
Gas
Clean
Gas
4
MicroMistTM
Scrubber Elements
• High Efficiency Separator Stage
Combination of Dual Orifice
Contact (DOI) trays with
Mist Eliminator
• “Flushing” Removal of Dirty Water
Droplets With Irrigation And
Backwash Spray Nozzles
• Prevents Carry Over of Water
into Scrubber Outlet
Additional Features
• Maximize Re-use Water
With Recirculation Tanks
• Minimize Fresh Make-up Water
• Experience with PH Control
• Steady ∆P Across All
Process Operating Conditions
• No Hassle Maintenance
• Proven Results With All
Fuel Sources (Coal, Oil, NCG)
• “One System”
Air Pollution Control Option
•UL Listed Control Enclosures
With Fully Automated Control
Capabilities
MicroMistTM Scrubber
Emissions Control
Technology Comparison
PM
PM
SO2
H2SO4
(front)
(back)
MicroMistTM Scrubber
x
x
x
x
ESP
x
x
some
x
-
ESP, SO2 Scrubber
& WESP
x
x
x
x
Baghouse
x
x
-
some
-
ESP & SO2 Scrubber
Baghouse, dry lime
injection
Piloting the
MicroMistTM Scrubber
• Pilot testing emissions control applications is
the most effective way to predict performance,
operating conditions & chemical consumption.
• Pilot units must be accurately “scalable” to
ensure correct and predictable results
• Pilot units must be modular to allow simple
addition and subtraction of process stages
Test Capacity = 6,000 ACFM
Production 8” Venturi Tube
Incorporates Patented
StarTM WESP Technology
MicroMistTM Scrubber
Field Testing Pilot Equipment
2
1
SUB-COOL
QUENCH
3
MicroMistTM
VENTURI
EME
4
SEPARATOR
ALL MOUNTED ON A FLAT-BED FOR CONVIENENCE
Why try the
MicroMistTM Scrubber Pilot?
• Cost Effective Test of System Efficiency
• All Equipment Arrives on Site Together
• Easy, Convenient, and Compact
• Complete Engineering Assistance
• Includes All Required Instrumentation
• Includes Production 8” Venturi Tube in MMV Stage
• Test Ports in Multiple Locations
• On-site Field Service Technicians
• “One System” Solution To Pollution Control