Power Generation Positive Displacement Pumps Reliability
Positive Displacement Pump Reliability & Maintenance maintenance and reliability for Reliability Consulting for Power Generation Plants facilities.
Why it matters
Key Benefits
Accurate Chemical Feed Dosing
Flow verification on chemical feed pumps ensures water treatment, flue gas treatment, and SCR reagent dosing rates match the treatment requirements that protect boiler tubes and meet emissions limits.
Maintained Fuel Oil Supply
Fuel oil forwarding pump monitoring confirms consistent fuel delivery pressure and flow to burners during oil firing operations and startup sequences.
Reliable Lubrication System Performance
Lube oil system pump monitoring ensures adequate oil pressure and flow to turbine, generator, and auxiliary equipment bearings that depend on forced lubrication for survival.
Context
Challenge & Approach
The Reliability Challenge
Power plant PD pumps on chemical dosing systems must maintain precise injection rates for phosphate, caustic, hydrazine, and ammonia to protect boiler tube integrity and steam purity. Diaphragm fatigue and check valve fouling cause dosing accuracy drift that leads to boiler chemistry excursions and tube failures. Fuel oil forwarding pumps on dual-fuel units experience seal failures from temperature cycling and viscosity changes during fuel switching. SCR reagent (urea/ammonia) injection pumps must maintain accurate dosing to meet CEMS emission limits. Many power plants treat chemical dosing pumps as consumable items rather than applying reliability consulting to reduce failure rates.
Our Approach
We perform dosing accuracy verification using calibration cylinder tests and comparison with water chemistry analytical results. Diaphragm condition assessment through pressure decay testing identifies incipient rupture. Check valve leak-back testing quantifies reverse flow impact on dosing accuracy. Pulsation dampener sizing and condition verification ensures smooth flow delivery. We correlate dosing pump performance with boiler water chemistry trends to identify under-dosing and over-dosing conditions. Our deliverable includes a chemical feed pump maintenance program, dosing accuracy verification schedule, diaphragm replacement intervals, and a water chemistry impact analysis linking pump reliability to boiler tube protection.
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Learn More →Critical chemical dosing pumps include boiler water treatment pumps for phosphate, caustic, and oxygen scavenger injection; cooling water treatment pumps for biocide, scale inhibitor, and corrosion inhibitor feed; and SCR urea or ammonia injection pumps for NOx emission control. Each directly affects either equipment protection or environmental compliance. Dosing accuracy is essential because both under-treatment and over-treatment create problems.
Even primarily gas-fired plants require fuel oil for startup, flame stabilization, and backup fuel capability. Fuel oil pump failures during a cold start can delay unit synchronization and affect grid reliability commitments. Unreliable fuel oil systems also compromise the plant ability to switch fuels during gas supply curtailments. Pump testing and maintenance should be scheduled to ensure fuel oil system readiness regardless of how infrequently oil firing occurs.
Turbine-generator bearings depend entirely on the forced lubrication system for oil supply. Main oil pump failure triggers a trip to the AC or DC emergency backup pump. If backup pumps also fail, the turbine-generator must be tripped and coasts down on turning gear. Bearing damage during a lube oil interruption can cause catastrophic rotor-to-stator contact. Lube oil pump redundancy, automatic transfer, and regular backup pump testing are essential for protection.
Get Started
Request a Free Reliability Assessment
Tell us about your equipment and facility. Our reliability team will review your situation and recommend a tailored reliability program — no obligation.
Chemical Feed Accuracy Protects Your Boiler Investment
We maintain your dosing pumps to deliver precise water treatment chemistry that prevents boiler tube failures and chemistry excursions.
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