Excerpts of Test Reports

Test Resultsat Nominal Dust Charges

The following test results were determined by the inspection authority for air pollution control, 'Deutsche Montan Technologie' (DMT) in Essen, Germany.

Filter Material CF / Crude Gas Concentration 2,000 mg/m³

Air quantity (density =1,2 kg / m³) m³ / s * 28.3
Total pressure loss Pa * 1,900
Raw Gas concentration mg / m³ 2,000
Clean Gas concentration mg / m³ 0.482
Degree of efficiency % 99.976
Air-to-cloth ratio m³ / (m² * min) 2.4
* = average value

Filter Material CFC / Crude Gas Concentration 2,000 mg/m³

Air quantity (density =1,2 kg / m³) m³ / s * 8.33
Total pressure loss Pa * 2,650
Raw Gas concentration mg / m³ 2,000
Clean Gas concentration mg / m³ 0.195
Degree of efficiency % 99.990
Air-to-cloth ratio m³ / (m² * min) 2.22
* = average value

Filter Material CFM / Crude Gas Concentration 2,000 mg/m³

Air quantity (density =1,2 kg / m³) m³ / s * 10.0
Total pressure loss Pa * 3,250
Raw Gas concentration mg / m³ 2,000
Clean Gas concentration mg / m³ 0.08
Degree of efficiency % 99.996
Air-to-cloth ratio m³ / (m² * min) 2.47
* = average value

 

Test Results at increased Dust Charges

At several applications e. g. dust collection at TBMs higher dust charges must be expected. Therefore tests have been performed especially for these types of operation.

The following examples show additionally that the required clean gas values are achieved independent of the crude gas concentration.

Filter Material CFM / Crude Gas Concentration 4,000 mg/m³

Air quantity (density =1,2 kg / m³) m³ / s * 10.0
Total pressure loss Pa * 3,100
Raw Gas concentration mg / m³ 4,000
Clean Gas concentration mg / m³ 0.058
Degree of efficiency % 99.990
Air-to-cloth ratio m³ / (m² * min) 2.36
* = average value

Filter Material CFM / Crude Gas Concentration 10,000 mg/m³

Air quantity (density =1,2 kg / m³) m³ / s * 10.0
Total pressure loss Pa * 3,100
Raw Gas concentration mg / m³ 10,000
Clean Gas concentration mg / m³ 0.055
Degree of efficiency % 99.999
Air-to-cloth ratio m³ / (m² * min) 2.36
* = average value

 

Even dust charges of 50.000 mg/m³were successfully tested with CFT compact filter elements on the test stand of DMT.

All test reports can be transferred on request.

Gallery

Scheme of a Compact Filter Element