- •5.3 Test Instructions
- •Table of Allowable Rapid Fluctuations of Certain Key Measurements.
- •5.5.6 Data Verification
- •5.6 Results
- •5.7 Analysis
- •5.7.1 Method of Trending Results
- •5.8 Report
- •HP / IP Turbine Efficiency Test
- •Typical Control Room Data Sheet
- •Point ID
- •Condenser
- •Annexure - I
- •CONDENSER DESIGN DATA
- •Annexure - II
- •TEST READINGS
- •Annexure - III
- •TYPICAL CONTROL ROOM READINGS
- •UNITS
- •kcal/hr
- •3.0 Working And Test Set Up
- •TEST ENGINEER (TE):-----------------------------------------
- •ENGINEERING REVIEW
- •PERSONNEL REQUIRED
- •TEST CREW ORIENTATION
- •REFERENCE DRAWINGS
- •LEAK DETECTOR OPERATION
- •TEST LOG
- •ACCESSIBILITY
- •CONTROL ROOM / UNIT DATA
- •LIST OF INSTRUMENTS & ACCESSORIES REQUIRED FOR AIR-IN-LEAK TEST
- •L. P. Turbine
- •*Total time from leak sensing by instrument to retrieval to zero (0)
- •Unit
- •LOW FEED WATER TEMPERATURE
- •EXCESSIVE MAKEUP
- •HIGH WATER LEVEL
- •EXCESSIVE NUMBER OF TUBES PLUGGED
- •HIGH DRAIN COOLER APPROACH TEMPERATURE (DCA)
- •DRAIN COOLER INLET NOT SUBMERGED
- •IMPROPER SETTING
- •EXCESSIVE TUBE BUNDLE PRESSURE DROP
- •HP Heater Test Data
- •Control Room Readings
- •FAULT TREE
- •LP Heater Test Data
- •Control Room Readings
- •FAULT TREE
- •LOW FEED WATER TEMPERATURE
- •EXCESSIVE MAKEUP
- •WORN VENT
- •HIGH WATER LEVEL
- •TUBE LEAKES
- •HEADER PARTITION LEAKS
- •EXCESSIVE NUMBER OF TUBES PLUGGED
- •HIGH DRAIN COOLER APPROACH TEMPERATURE (DCA)
- •DRAIN COOLER INLET NOT SUBMERGED
- •IMPROPER SETTING
- •EXCESSIVE TUBE BUNDLE PRESSURE DROP
- •EXCESSIVE NUMBER OF TUBES PLUGGED
- •Unit
- •BFP Test Data
- •Typical Control Room Readings
- •Boiler Feed Pump A / B / C
- •Typical DAS Readings
- •Description
- •CONTENTS
- •1.0 Introduction
- •3.1 Process Description
- •4 References
- •4.1 ASME Performance Test Code 4.2 – 1969, Coal Pulverizers
- •5 Prerequisites
- •(A clean air test is performed with the primary air to the mill at full load normal conditions with the mill out of service (normal primary airflow, no fuel flow)).
- •Avg. Velocity
- •6.4 Isokinetic Coal Sampling
- •4.5.2 Unburned in Flyash at Economizer Outlet
- •Summary
- •Dry Gas Loss
- •Gas Temp Leaving AH - Corr. to Design Ambient
- •OBJECTIVE : Determine the amount of Power being consumed by the primary plant equipment.
- •TEST ENGINEER (TE):
- •REFERENCE: ASME PTC 19.6-1955 and TVA Proc. No. TS/PERF/RTST/FOS/16.0
- •BILL OF MATERIALS
- •BILL OF MATERIALS
- •Note: Quantities to be decided as per the requirement
- •2.4 PORTABLE DATA ACQUISITION SYSTEM
- •BILL OF MATERIAL
- •Acquisition
- •EQUIPMENT: Thermocouple wire for flue gas temperature measurement
- •2.9 HIGH VELOCITY THERMOCOUPLE (HVT) PROBE
- •2.11 HIGH VOLUME FLYASH SAMPLER
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Centre For Power Efficiency And Environmental |
Procedure Number |
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NTPC |
Protection, NOIDA |
CENPEEP/EFF/TP/201 |
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TITLE |
Rev. 1 |
Date: 01/20/00 |
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CENPEEP |
Routine Pulverizer Performance Test |
Issue Date: |
Draft |
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6 |
Of 18 |
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4References
4.1ASME Performance Test Code 4.2 – 1969, Coal Pulverizers
4.2ASME Performance Test Code 4.1 – 1964, Steam Generating Units
4.3DS/ISO 9931 Sampling of pulverized coal conveyed by gases in direct fired coal system
5Prerequisites
5.1Calibration of primary airflow (PA) through the pulverizers is the first step in balancing fuel and air to the burners. Ensure that primary air flow instrument is calibrated regularly using standard pitot if the duct lay out permits that.
5.2Mills are tested at specified parameters and under steady operating conditions. Repeatability of the test is essential. Two separate set of crew, working simultaneously, on opposite corners can be used. This will facilitate collection of two independent sets of data. Alternatively, repeat tests with the specified mill parameters are conducted on each mill as a check for consistency and validity of data.
5.3A clear communication should be established with the Unit Control Engineer regarding the scope of testing being carried out and stability of inputs required. Typical Control Room data sheet and dirty air / fuel ratio test sheets are enclosed. Typical Excel based spread sheet can be developed to incorporate as a data base. Floppy disk can be obtained from CENPEEP to process the data base obtained for calculations.
6Procedure
6.1Clean Air Curves
Clean air curves are a plot of mill differential versus stationary flow measurement device differential with no coal flow. It represents the pressure drop through the mill due to its internal components. As such, it gives an indication of wear by comparing clean air curves over time. The number of hours of operation of a pulverizer, or increased spillage are generally used to determine mill maintenance requirements. Increased usage of primary air is normally tried as a solution to reduce mill spillage which results in increased internal wear and deterioration in + 50 mesh fractions.