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ACFM (Advance Coal Flow Measurement): Computer-Controlled Isokinetic Coal Pipe Testing

The Advanced Coal Flow Measurement System (ACFM) was designed and developed strictly to measure air and fuel flows through coal pipes. It is a computer-controlled PC-based isokinetic extraction type testing system. It utilizes a dirty air probe for air flow measurement, and (3) types of advanced coal sampling probes. Probe types are shown to the lower left.

The computer controlled isokinetic extraction rate is adjusted point-by-point to maintain 100% isokinetic coal extraction across the pipe velocity profile. Each pipe is carefully tested to assure accuracy within 3% for air and 6% for coal. Any deviation out of this tolerance will nullify that particular test and restart another.

Special Features:

  • Fast and accurate test results
  • Self adjusts to extract 100% isokinetic
  • Fuel flows automatically moisture correct
  • Comprehensive report
  • Easy to understand data format
  • Rapid ROI of testing expenditure

Date Obtained:

  • Coal flow rate
  • Primary air flow
  • Primary air velocity
  • Primary air temperature
  • Air / coal ratio
  • Air velocity profile
  • Static & total pressures
  • Relative humidity
  • Dew point

Date Reported:

  • Coal & air flow rates
  • Coal pipe balance
  • Coal fineness
  • Air velocity profile
  • Comparision of measured flows to plant intrumentation
  • Suspected causes of problems
  • Recommendations

Types of Extractive Probes Used:

Depending on the testing situation, SAS can utilize different coal extracting probes to insure the best possible results. SAS Global utilizes (3) different style probes; an ASC Linear Probe, ASME Linear Probe, ASC Swivel Head Probe, or RotorProbeTM.

ACFM Data Collection Example: CE Pressurized Mill with 8 Pipes