Microwave measuring system lb 356 456 micro moist
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1. 2. 3. 4. Microwave Measuring System, LB 356-456 Micro-Moist. Moisture Content in Coal is an important parameter: Preparation-Regulate Moisture Content Handling-Dust-Ice Transport-Weight Trading-Weight Calorific Value. 5. Microwave Measuring System, LB 356-456 Micro-Moist.

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Microwave Measuring System, LB 356-456 Micro-Moist

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Microwave measuring system lb 356 456 micro moist

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Microwave measuring system lb 356 456 micro moist

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Microwave measuring system lb 356 456 micro moist

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Microwave measuring system lb 356 456 micro moist

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356-456 Micro-Moist

Moisture Content in Coal is an important parameter:

Preparation-Regulate Moisture Content

Handling-Dust-Ice

Transport-Weight

Trading-Weight

Calorific Value

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356-456 Micro-Moist

  • Microwave Transmission Techniques are the most accurate

  • method of determining moisture content of Coal

  • Attenuation/Area Weight

  • Phase Shift/Area Weight

  • Phase Shift and or/Attenuation

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356-456 Micro-Moist

Attenuation measurement

can provide accuracy up to 1wt% moisture

Temperature dependence error

Bulk Density dependence error

Particle size dependent error

Conductivity dependent error

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 456 Micro-Moist

Phase Shift Measurement:

or (Combined Attenuation and Phase Shift)

Independent of Temperature of Coal

Independent of Particle Size variations

INTEGRAL Area Weight Compensation

Accuracy of 0.2 wt% moisture achievable

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356-456 Micro-Moist

Principle of Operation

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 354-356-456 Micro-Moist

  • The choice of 2.7-3.4 GHz frequency range:

  • Measurement of bulk, not surface. This provides a representative measurement

  • The temperature coefficient of free water crosses zero at 3 GHz

  • Attenuation due to ionic conductivity (salt content,…) is reduced at higher

  • frequencies

  • Frequency analysis over the frequency range provides phase measurement greater

  • than 360 deg with plausibility control

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356 Micro-Moist

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356 Micro-Moist

Coal Preparation Plant:

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 356 Micro-Moist

Coal Preparation Plant management reported precision of 0.4% moisture (one sigma RMS)

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Microwave measuring system lb 356 456 micro moist

Microwave Measuring System, LB 456 Micro-Moist

  • Product Improvements:

  • Reference cable can be replaced by short link if Toconstant

  • PT-100 Temperature Compensation with direct connection

  • Detector to Evaluation Unit uses FSK (Frequency Shift Keying)

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