POWER PLANT EMISSION CONTROL
Power Plant Flue Gas Treatment Solutions for Dust and NOx Control
Solve particulate emissions, unstable baghouse pressure drop, short filter-bag life and SCR performance loss with one engineering review of the fuel, gas path and operating envelope.
Choose your starting point
Compliance focus
Particulate + NOx
Operating focus
Pressure drop + ammonia slip
Asset focus
Bag life + catalyst activity
Project focus
New build + retrofit + outage
THE COMPLETE GAS PATH
Treat the boiler, SCR and particulate-control system as one operating chain
A change upstream can create a failure downstream. Fuel variability, temperature, SOx, moisture, dust loading and reagent control should be reviewed together before changing filter media or catalyst.
01
Boiler & fuel
Load profile, fuel quality, combustion and ash characteristics
02
SCR denitration
Temperature window, NOx conversion, ammonia slip, poisoning and plugging
03
Particulate control
Dust loading, filtration velocity, pressure drop, cleaning and bag integrity
04
Stack performance
Plant emission target, monitoring trend, operating stability and evidence
Important: Equipment order and gas conditions vary by plant. The final recommendation must follow the actual process diagram and measured operating data.
PROBLEM-LED DIAGNOSIS
Start with the symptom the plant team is trying to eliminate
The first recommendation should be a test or data review—not an immediate product substitution. Use the rows below to narrow the mechanism before selecting bags, catalyst or operating changes.
Observed problem
Check first
Mechanism to confirm
Solution direction
Particulate emissions rise
Outlet trend, leak location, bag inspection, seals and cages
Bag damage, poor fit, seam failure, bypass or cleaning damage
Locate the failure mode; correct fit, construction, installation or operating cause
Baghouse pressure drop rises
DP trend, cleaning frequency, dew-point margin, hopper and dust release
Condensation, blinding, cleaning imbalance, high loading or low permeability
Stabilize the process and cleaning; then verify media structure and finish
Filter-bag life is shorter than planned
Failure position, used-bag condition, temperature and chemistry history
Thermal attack, oxidation, hydrolysis, chemical attack, abrasion or mechanical damage
Specify fibre, scrim, finish, membrane and construction against the confirmed mechanism
NOx conversion falls
SCR inlet/outlet NOx, temperature, ammonia slip, layer DP and operating hours
Activity loss, poisoning, erosion, plugging, flow or ammonia-distribution problem
Test representative catalyst and review operating conditions before replacement
Ammonia slip or ABS risk increases
NH3/NOx control, temperature profile, SO2/SO3 and air-preheater trend
Poor distribution, low activity, low-temperature operation or excess injection
Coordinate catalyst condition, flow field and reagent control
Fuel, load or process changes
New fuel analysis, load profile, gas chemistry, dust and temperature envelope
The original design basis no longer represents current operation
Recalculate the operating envelope and revalidate both filtration and SCR
CHOOSE THE RIGHT PROJECT PATH
Different situations need different engineering deliverables
A quotation is useful only when it is tied to the plant’s decision stage. Select the path that matches the work now.
NEW BUILD / RETROFIT
Build a design basis before procurement
For a new unit, fuel conversion, capacity increase or emission upgrade.
✓ Process and emission target review
✓ Baghouse and SCR interface assumptions
✓ Preliminary product specification
✓ Drawing and installation data checklist
OPERATING PROBLEM
Find the failure mechanism before replacement
For rising emissions, DP, bag failures, low NOx removal or high ammonia slip.
✓ Trend and alarm review
✓ Used bag or catalyst sample inspection
✓ Root-cause hypothesis and confirmation plan
✓ Corrective action priority
PLANNED OUTAGE
Reduce uncertainty before the shutdown window
For bag changeout, catalyst management or inspection planning.
✓ Quantity and dimension confirmation
✓ Remaining-life or activity evidence
✓ Packing and installation sequence
✓ Post-startup monitoring checklist
ENGINEERED SOLUTION MODULES
Products are selected inside the system solution—not as isolated catalogue items
The final scope may include one module or a coordinated combination, depending on the confirmed cause and project objective.
PARTICULATE CONTROL
Filter bags and complete bag specification
For coal-fired, biomass and waste-to-energy baghouses where emission stability, pressure drop and service life must be balanced.
Fibre and scrim
Membrane / surface finish
Weight, permeability and thickness
Dimensions, seams, cuff and bottom
Cage fit and installation
NOx CONTROL
SCR catalyst selection and lifecycle support
For catalyst replacement, performance decline, ammonia-slip control and retrofit decisions across the actual operating temperature and gas chemistry.
Catalyst formulation
Pitch, wall thickness and module size
Activity and pressure-loss basis
Poisoning / plugging review
Testing, regeneration or replacement route
System coordination matters
SCR operation can change downstream gas temperature, chemistry and deposit behavior; baghouse operation can affect plant draft and energy use. Review interface risks before optimizing either component alone.
DATA REQUIRED FOR A DEFENSIBLE RECOMMENDATION
Send evidence that describes normal, peak and upset conditions
Single-point design values often hide the event that causes failure. Trends, ranges and the exact measurement basis are more useful than a product name alone.
01
Process and gas data
• Unit and fuel type
• Gas volume / load range
• Normal, peak and upset temperature
• Moisture, O₂, SOx and dust
• Inlet and target emission basis
02
Equipment and operating data
• Process flow diagram
• Baghouse or SCR drawings
• Cleaning / ammonia-injection logic
• Differential-pressure trends
• Dimensions, quantity and outage window
03
Failure and verification evidence
• Emission and alarm trends
• Photos and failure locations
• Used bag or catalyst samples
• Service history and previous changes
• Laboratory or field test reports
WHAT THE ENGINEERING REVIEW SHOULD PRODUCE
Trust comes from traceable decisions and clear acceptance criteria
01
Design-basis summary
The operating envelope, assumptions and missing data are stated before the product recommendation.
02
Complete specification
Material or catalyst details, dimensions, construction, interfaces and quantities are documented.
03
Verification plan
Inspection, testing, acceptance basis and evidence required from both supplier and plant are agreed.
04
Lifecycle follow-up
Installation observations and post-startup trends are used to confirm performance and guide future maintenance.
TECHNICAL RESOURCES
Use deeper guides when the issue requires specialist review
Power plant SCR catalyst selection and failure mechanisms
Review composition, deactivation, regeneration and selection factors.
Read the technical guide →SCR catalyst lifecycle management
Understand activity loss, ammonia slip, inspection and replacement planning.
Read the technical guide →WESP operating failures and troubleshooting
A supporting guide for plants using wet electrostatic polishing downstream.
Read the technical guide →POWER PLANT FAQ
Questions plant teams ask before committing to a solution
Should we replace filter bags immediately when emissions rise?
Not until the leak path and failure mechanism are checked. A fit, seal, cage, installation or operating problem can persist after installing new bags.
Can one filter-bag specification cover every generating unit?
Only when the fuel, gas-treatment route, operating envelope, equipment and failure history are demonstrated to be equivalent.
When should SCR catalyst be tested?
Testing is useful when NOx conversion declines, ammonia slip or pressure loss rises, the operating window changes, or a replacement/regeneration decision is approaching.
What is needed for a useful quotation?
Provide the process target, gas and dust data, drawings, dimensions, quantity, service history, failure evidence and required outage or delivery schedule.
REQUEST A POWER PLANT TECHNICAL REVIEW
Describe the operating problem, and we will define the data needed next
Send the unit type, fuel, current emission or operating symptom, gas data, equipment drawing and planned decision date. If information is incomplete, start with the available trends and photos.