Measuring

The coal conduit layouts of power plants vary a lot. The development of similar coal pipe resistances to gain an even two-phase coal flow was one of the tasks power plant designers tried to achieve. Due to these constructural challenges unique measuring technologies providing the most reliable and most accurate information have to be used.

The technologies we use are based on electromagnetic waves as well as on acoustic emissions. Depending on the individual location we decide which technology is most appropriate. Also a combination of both is applied to insure an independent (redundant) system for the highest accuracies in measuring.

Kohlestaubverteilung evonic

 

Acoustic measurement

The intergral preamplified acoustic emission sensors are specifically engineered to attain high sensitivity. A low-noise input, 40dB preamplifier and a filter are all incorporated inside the sensor housing. These trans-ducers are completely enclosed in a metal stainless steel housing treated to minimize RFI/EM interference.

sensor

  Coal Flow Monitoring System

The typical Coal Flow Monitoring System supports 16 integrated channels to cover four feeder tubes from four pulverizers and includes:

- 16 channel ruggedized monitoring system
- Coal Flow Monitoring Software with alarms on changes in coal flow factor
- 16 integrated preamplifier sensor and cable assemblies
- 16 sensor mounting assemblies for coal feeder tubes
- Networking protocol, as selected by the plant
- Installation, Operation and Maintenance Manuals
- Installation and Commissioning Support available

> more information: www.mistrasgroup.com

 

Electromagnetic wave technology

The latest electromagnetic wave technology is used and located inside a sealed stainless steel housing. The sensing technology produces a homogeneous field inside the coal pipe for measuring. The reflection of the moving particles with regard to their frequency and amplitude is evaluated.

sensor

evaluation unitevaluation unit

> more information: www.bht-turbo.com

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