Coal-fired power plants can improve efficiency by optimizing combustion, maintaining proper coal fineness, balancing fuel distribution, controlling primary airflow, and reducing equipment wear.

Key performance improvements include:

• Improved coal pulverizer performance
• Balanced coal and air distribution to burners
• Reduced unburned carbon and Loss on Ignition (LOI)
• Optimized combustion air-to-fuel ratios
• Improved boiler heat transfer
• Reduced auxiliary power consumption
• Extended component service life

SAS Global Corporation provides coal mill modernization technologies, fuel balancing equipment, burner upgrades, diagnostic testing, and premium wear-resistant components designed to improve plant performance and reliability.

Coal-fired power plants frequently experience performance problems related to fuel preparation, combustion efficiency, equipment wear, and material handling.

Common challenges include:

• Poor coal fineness
• Uneven coal distribution between burners
• Improper primary airflow
• Excessive coal pulverizer rejects
• Reduced mill grinding capacity
• High Loss on Ignition (LOI)
• Elevated emissions
• Burner slagging and fouling
• Accelerated wear of pulverizer components
• Premature coal piping failures

SAS Global offers engineered modernization components and diagnostic services designed to identify the underlying causes of these problems and develop practical performance improvements.

Heat rate measures the amount of fuel energy required to produce a unit of electrical energy, typically expressed in BTU per kilowatt-hour (BTU/kWh).

A lower heat rate indicates that a power plant uses less fuel energy to generate the same amount of electricity.

Factors affecting heat rate include boiler combustion efficiency, turbine performance, steam conditions, auxiliary power requirements, and fuel preparation.

Proper coal pulverizer operation, balanced fuel distribution, improved coal fineness, and optimized combustion can contribute to improved boiler efficiency and overall plant heat rate.

SAS Global provides coal mill modernization and combustion optimization solutions designed to address fuel preparation and combustion-related efficiency losses.

Coal quality directly affects pulverizer operation, combustion efficiency, emissions, and maintenance requirements.

Important coal characteristics include:

• Heating value
• Moisture content
• Ash content
• Grindability
• Sulfur content
• Volatile matter
• Mineral composition

High-moisture coal can increase pulverizer drying requirements, while hard-to-grind coal can reduce milling capacity and affect fineness.

Coal with high ash content may also increase abrasive wear throughout fuel handling and combustion systems.

SAS Global provides pulverizer modernization, wear protection, and diagnostic testing solutions that help plants adapt to challenging fuel characteristics.

es. Many coal-fired power plants can improve performance by modernizing selected components rather than replacing entire pulverizers, burner systems, or fuel handling equipment.

Targeted improvements may include:

• Rotating Vane Wheel modernization
• Static classifier upgrades
• Classifier cone replacements
• Pulverizer discharge modifications
• Coal pipe balancing technologies
• Burner component upgrades
• Premium wear-resistant liners
• Diagnostic testing and combustion tuning

SAS Global develops custom-engineered modernization solutions for existing coal-fired power generation equipment, helping facilities address specific performance limitations while retaining suitable existing equipment.

Coal pulverizer modernization involves upgrading existing mill components to improve fuel grinding, classification, drying, transport, and equipment reliability.

Common modernization objectives include:

• Increasing pulverizer capacity
• Improving coal fineness
• Reducing coal rejects
• Improving primary air distribution
• Reducing internal component wear
• Improving fuel distribution to burners
• Extending maintenance intervals

SAS Global provides custom-engineered modernization components for MPS, MBF, CE, Riley, Foster Wheeler, and other pulverizer designs.

Modernization programs can include diagnostic testing, engineering, fabrication, installation, and performance evaluation.

Upgrading an existing coal pulverizer can improve operating performance and reduce maintenance requirements without requiring complete mill replacement.

Potential benefits include:

• Increased grinding capacity
• More consistent coal fineness
• Improved primary airflow
• Reduced coal spillage and rejects
• Better coal distribution
• Reduced component wear
• Improved operational reliability
• Longer maintenance intervals

The benefits depend on the pulverizer design, existing component condition, coal characteristics, and operating requirements.

SAS Global offers engineered pulverizer modernization technologies designed to address specific performance and maintenance challenges.

A Rotating Vane Wheel (RVW) is a component used in certain vertical spindle coal pulverizers to manage primary airflow and coal transport within the mill.

SAS Global's patented Rotating Vane Wheel modernization technologies are engineered to improve airflow distribution and material movement through the pulverizer.

Depending on mill design and operating conditions, potential benefits include:

• Improved primary air distribution
• Better coal transport
• Reduced material accumulation
• Reduced internal wear
• Improved pulverizer operating consistency
• Extended component service life

SAS Global offers Rotating Vane Wheel modernization solutions for applicable pulverizer models, including MPS, MBF, CE HP, CE RP, CE RS, CE RB, and IHI series mills.

A coal pulverizer classifier separates fine coal particles from oversized particles before the fuel is transported to the boiler burners.

Particles meeting the desired fineness are carried out of the pulverizer, while larger particles are directed back toward the grinding zone.

Improper classification can allow excessive coarse coal to reach the burners, potentially contributing to incomplete combustion, elevated unburned carbon, and reduced boiler efficiency.

SAS Global offers classifier modernization technologies, including its patented High Spin Static Classifier, designed to improve classification performance and coal fineness.

The appropriate classifier configuration depends on pulverizer design, fuel characteristics, and performance requirements.

Excessive coal rejects and spillage can result from improper primary airflow, worn internal components, inadequate grinding capacity, excessive coal loading, or mechanical problems.

Potential contributing factors include:

• Insufficient primary airflow
• Worn grinding components
• Improper mill clearances
• Poor fuel distribution
• Damaged internal liners
• Excessive pyrite or foreign material
• Improper pulverizer operation

SAS Global provides pulverizer inspections, modernization components, wear-resistant liners, and diagnostic services to help identify and address the causes of excessive rejects and spillage.

Coal pipe balancing helps maintain consistent pulverized coal distribution among the fuel pipes supplying a boiler's burners.

Uneven coal distribution can create fuel-rich and fuel-lean burner conditions, potentially contributing to combustion instability, increased unburned carbon, emissions variability, and uneven furnace heat distribution.

Proper fuel balancing can help improve:

• Burner-to-burner fuel distribution
• Combustion uniformity
• Boiler operating efficiency
• Flame stability
• Emissions control
• Overall combustion performance

SAS Global offers coal pipe balancing technologies and diagnostic testing services designed to identify and correct fuel distribution imbalances.

Uneven pulverized coal distribution can result from variations in piping geometry, airflow distribution, particle concentration, mill discharge conditions, and internal piping resistance.

Common contributing factors include:

• Unequal fuel pipe lengths
• Pipe elbows and bends
• Uneven primary airflow
• Coal particle segregation
• Improper riffle performance
• Asymmetric mill discharge flow
• Differences in piping resistance

SAS Global offers patented coal pipe balancing technologies, including the Pre-Riffle Diffuser, In-Line Diffuser, CV-Style Adjustable Orifice, Conical Fuel Particulate Diffuser, and other engineered fuel distribution devices.

The SAS Global patented CV-Style Adjustable Orifice is an advanced fuel pipe balancing device designed to precisely control airflow resistance and fine-tune fuel distribution in coal-fired power generation systems.

Unlike conventional fixed orifices, the CV-Style Adjustable Orifice features a unique Center-V design that provides a smooth, predictable restriction curve while minimizing coal accumulation and mechanical jamming.

Key benefits include:

• Online Adjustability: Allows operators to fine-tune fuel pipe balance while the pulverizer remains in operation.
• Precise Flow Control: Provides predictable adjustments to fuel pipe resistance and airflow distribution.
• Jam-Resistant Design: Minimizes coal impaction and material buildup that can interfere with conventional adjustable orifices.
• Improved Combustion: Supports more balanced fuel delivery and consistent burner operation.
• Reduced Maintenance: Eliminates repeated shutdowns associated with replacing or modifying fixed orifice plates.
• Flexible Installation: Available with manual handles or gearbox adjustments for integration into existing fuel piping systems.

When combined with SAS Global's Conical Fuel Particulate Diffuser, the CV-Style Adjustable Orifice helps achieve more consistent air-to-fuel distribution by allowing precise adjustment of individual fuel pipe resistance.

This coordinated approach can improve combustion uniformity, reduce unburned carbon, and support improved boiler efficiency.

The SAS Global patented Conical Fuel Particulate Diffuser is a coal pulverizer modernization component designed to improve pulverized coal distribution as fuel exits the mill and enters the burner fuel piping system.

During pulverizer operation, coal particles can form concentrated streams commonly called coal ropes or ribbons. These uneven particle concentrations can create significant differences in fuel distribution between outlet pipes.

The Conical Fuel Particulate Diffuser disrupts these concentrated coal streams and promotes a more uniform mixture of pulverized coal and primary air before the mixture enters the fuel pipes.

Key benefits include:

• Improved Coal Distribution: Reduces concentrated coal streams and uneven fuel delivery.
• Better Air-to-Fuel Balance: Promotes more uniform particle distribution between outlet pipes.
• Improved Combustion: Supports more consistent fuel delivery to individual burners.
• Reduced LOI: Can help reduce unburned carbon associated with uneven fuel distribution.
• Emissions Optimization: Supports combustion tuning efforts intended to reduce NOx and other emissions.
• Improved System Balancing: Creates more favorable conditions for precise downstream fuel pipe adjustments.

The Conical Fuel Particulate Diffuser addresses fuel distribution imbalances at the pulverizer outlet, while the CV-Style Adjustable Orifice provides downstream adjustment of individual fuel pipe resistance.

Together, these patented SAS Global technologies provide a coordinated approach to coal pipe balancing, combustion optimization, and improved boiler performance.

SAS Global's patented In-Line Diffuser is designed to improve the distribution of pulverized coal particles within a fuel piping system before the coal reaches the burner.

Uneven particle distribution can contribute to localized fuel-rich conditions, inconsistent combustion, and accelerated burner component wear.

The In-Line Diffuser helps redistribute coal particles to improve fuel distribution and support more consistent burner operation.

Potential benefits include improved combustion characteristics, reduced localized wear, and increased burner component service life.

Burner modernization involves upgrading existing burner components to improve fuel distribution, combustion stability, wear resistance, and operating reliability.

Depending on the existing burner design, modernization may include:

• Replacement burner tips
• Improved burner barrels
• Fuel distribution components
• Wear-resistant burner components
• Combustion optimization technologies

SAS Global offers burner modernization solutions for wall-fired, tangentially fired, and other applicable coal-fired boiler systems.

These upgrades can help improve operating performance and extend component life without requiring complete burner system replacement.

Slagging and fouling occur when ash and mineral compounds accumulate on furnace walls, heat transfer surfaces, or other boiler components.

Common contributing factors include:

• Coal ash chemistry
• High local flame temperatures
• Uneven fuel distribution
• Improper combustion air distribution
• Burner operating conditions
• Furnace temperature patterns

Excessive deposits can reduce heat transfer efficiency, increase maintenance requirements, and contribute to boiler operating problems.

SAS Global provides fuel balancing, burner modernization, and combustion diagnostic services that can help identify operating conditions contributing to slagging and fouling.

Loss on Ignition (LOI) is commonly used to estimate the amount of unburned combustible material remaining in fly ash.

Elevated LOI can indicate incomplete combustion, although measured values may also be influenced by ash composition and testing methods.

Potential causes include:

• Poor coal fineness
• Uneven fuel distribution
• Inadequate combustion air
• Poor fuel-air mixing
• Burner performance problems
• Insufficient combustion residence time

SAS Global offers pulverizer modernization, fuel pipe balancing, burner upgrades, and diagnostic testing services designed to address conditions contributing to incomplete combustion.

Coal pulverizer and burner improvements can support NOx optimization by improving fuel preparation, fuel distribution, and combustion control.

NOx formation depends on combustion temperature, oxygen availability, fuel properties, and furnace operating conditions.

More consistent coal fineness and fuel distribution can provide better control over burner operating conditions, potentially supporting emissions reduction strategies.

SAS Global offers pulverizer modernization, coal pipe balancing, burner components, and combustion tuning services that can be evaluated as part of a broader emissions optimization program.

Actual emissions improvements depend on boiler design, control systems, operating conditions, and applicable emissions limits.

Coal fineness and primary airflow are important factors affecting fuel preparation and combustion performance.

Proper coal fineness helps provide sufficient particle surface area for efficient combustion, while primary airflow supplies the energy needed to dry and transport pulverized coal from the mill to the burners.

Insufficient airflow can contribute to poor drying, inadequate coal transport, and increased rejects.

Excessive airflow can affect classification, fuel pipe velocities, increase wear, and burner operating conditions.

SAS Global provides pulverizer modernization and diagnostic technologies designed to improve coal fineness, primary airflow distribution, and fuel transport performance.

Coal-fired power plants use diagnostic testing to assess fuel preparation, combustion conditions, emissions, and equipment performance.

Common testing methods include:

• ACFM extractive fuel flow testing
• Coal fineness testing
• Primary airflow measurement
• Coal and fly ash analysis
• High Velocity Thermocouple (HVT) testing
• Backpass emissions mapping
• Visual flame analysis
• High-temperature boiler camera inspections

SAS Global provides specialized diagnostic testing and combustion tuning services to help facilities identify performance limitations and develop corrective recommendations.

ACFM extractive fuel pipe testing is used to measure and evaluate pulverized coal and airflow conditions within burner fuel piping systems.

The testing process provides information about fuel distribution, coal fineness, and air-to-fuel relationships.

These measurements help engineers identify differences between fuel pipes and evaluate the effectiveness of fuel balancing or pulverizer modernization efforts.

SAS Global provides ACFM fuel flow diagnostic services to support combustion optimization, baseline performance evaluation, and post-modernization testing.

Coal fineness testing measures the particle size distribution of pulverized coal leaving a mill.

Coal that is too coarse may burn less completely, potentially contributing to increased unburned carbon, reduced combustion efficiency, and other boiler performance problems.

Fineness testing can help identify:

• Classifier performance issues
• Grinding component deterioration
• Improper primary airflow
• Changes in pulverizer performance
• Opportunities for mill modernization

SAS Global provides coal fineness testing and pulverizer modernization solutions designed to improve fuel preparation and combustion performance.

High Velocity Thermocouple (HVT) testing is used to measure gas temperatures within boiler operating environments.

The technique uses a high-velocity aspirated thermocouple to obtain temperature measurements while reducing certain measurement errors associated with radiation effects.

HVT testing can help evaluate furnace and boiler temperature profiles, combustion conditions, and heat transfer performance.

SAS Global provides HVT testing as part of its diagnostic and combustion evaluation services for coal-fired power generation facilities.

Combustion tuning involves evaluating and adjusting fuel and air distribution to improve boiler performance while maintaining safe, stable operation and emissions compliance.

A combustion tuning program may include:

• Fuel pipe testing
• Coal fineness analysis
• Primary and secondary airflow evaluation
• Burner performance assessment
• Furnace temperature measurements
• Emissions testing
• Operating parameter adjustments

SAS Global provides diagnostic testing and combustion tuning services designed to identify combustion imbalances and support measurable operating improvements.

Coal-fired power plants can reduce equipment wear by selecting suitable abrasion-resistant materials, controlling operating conditions, and addressing areas experiencing concentrated particle impact.

Common high-wear components include:

• Pulverizer classifier cones
• Mill wall liners
• Grinding components
• Coal piping 
• Fuel handling chutes
• Crusher screens and hammers
• Burner components

SAS Global provides premium SureAlloy® Carbide Overlay Plate, Vanguard® Alloy Wear Plate, abrasion-resistant piping, and custom-engineered wear protection solutions.

Selecting materials based on actual wear mechanisms can help extend component life and reduce replacement frequency.

The most suitable wear-resistant material depends on the pulverizer component, abrasion severity, impact loading, and operating temperature.

SAS Global offers several premium materials, including:

SA1750CR®: Chromium carbide overlay designed for severe abrasive wear.

SA2000®: Complex carbide overlay providing advanced abrasion resistance and additional toughness.

SA6000®: Patented complex carbide overlay designed for demanding abrasion and impact conditions.

Vanguard®: Premium through-hardened alloy wear plate offering excellent abrasion and impact resistance.

These materials can be used in appropriately engineered pulverizer liners, classifier cones, deflectors, and other high-wear components.

Pulverized coal piping is exposed to abrasive particles moving at relatively high velocities, creating wear along straight sections, elbows, bends, and transitions.

Plants can extend piping service life by:

• Maintaining appropriate conveying velocities
• Reducing unnecessary flow disturbances
• Improving fuel distribution
• Using abrasion-resistant internal surfaces
• Monitoring pipe wall thickness
• Replacing high-wear components before failure

SAS Global manufactures SureAlloy Carbide Overlay Pipe and CLADPIPE™ Internally Hardfaced Pipe for demanding coal transport applications.

Coal handling performance can be affected by moisture, particle size, equipment geometry, material accumulation, and component wear.

Potential improvements include:

• Controlled-flow chute designs
• Improved hopper geometry
• Wear-resistant liners
• Coal sizing equipment
• Debris removal systems
• Crusher and screen upgrades

SAS Global offers premium wear-resistant chutes, patented self-cleaning coal sizing grids, debris separators, hammer mill modernization systems, and other material handling solutions.

These products are designed to improve material movement, reduce maintenance requirements, and enhance equipment reliability.

SAS Global Corporation supplies engineered products and technical services for coal-fired power generation facilities.

Available solutions include:

• Coal mill and pulverizer modernization
• Rotating Vane Wheel upgrades
• Classifier modernization
• Coal pipe balancing technologies
• Burner modernization components
• Diagnostic testing and combustion tuning
• Premium abrasion-resistant materials
• Wear-resistant piping systems
• Fuel handling and processing equipment
• Pulverizer installation and overhaul services

SAS Global works with power plant engineers, maintenance teams, and operators to evaluate equipment performance and develop application-specific improvement solutions.

Contact SAS Global Corporation

Phone: 248-414-4470

Email: info@sasglobalcorp.com

Website: www.sasglobalcorp.com