Cristini Diagnostic Systems Cristini Group Paper Machine Clothing Department of physics of the microwave, University of Florence Cristini Diagnostic Systems PaperCon 2011 Page 158
Microwave Diagnostic Instruments Line FiberScan ONE PresScan MKIV PermFlow PermFlow DUOFIX Instrument Machine section Forming Section Press Section Press Section Press Section Installation type Portable, on line Portable Portable On line Features Microwave water mass consistency meter, CMD trends, connection to DCS systems Microwave moisture meter avg temp Felt permeability meter, temp. trend, trigger Felt permeability meter, temp. trend, trigger, connection to DCS systems PaperCon 2011 Page 159
On-line Diagnostic Systems The logic of Cristini planar microwave sensors technology is typically oriented to the integration into other elaborate systems (DCS-MCS), more and more frequent in the control loop of the papermaking process. There are two main reasons for this: 1. safety reasons for the operator; it is more and more difficult to take data sampling by hand on the paper machines; 2. higher complexity of the new paper machines; now equipped with better controls systems. DCS-MCS systems are more and more evolved and they require more on-line data. PaperCon 2011 Page 160
Planar Sensor Microwave Emission ElectroMagnetic field FiberScan Planar sensor Water thickness EY component of the near EM field on a transverse x cut plane PaperCon 2011 Page 161
FiberScanONE Microwave Consistency Meter Telescopic Pole Control unit, OLED display Microwave Sensor BlueTooth Data transmission PaperCon 2011 Page 162
FiberScan Microwave Consistency Meter The FiberScan consistency meter permits to: Troubleshoot drainage, retention & consistency in forming sections; Evaluate the efficiency of the chemicals used in the papermaking process, the drainage aids and the fabric cleaning; Conduct pulsation and turbulence analysis trough FFT filtration of the MD consistency profile. With a sampling speed of 1024Hz FiberScan is the fastest consistency meter on the market. PaperCon 2011 Page 163
FiberScan Consistency Meter: Advantages Harmless microwaves instead of radioactive sources to obtain the measurements. No radioactive hazard to the operator; No licences nor permissions to stock, transport or use radioactive materials. Improved reading reliability and repeatability; FiberScan technology permits to read up to 48.000gr/m2 of water (48mm), making not only suitable for paper, but also for pulp machines. Connection to DCS systems; Patented principle to compensate the water charge changes, insensitivity to chemicals; OptiWave high speed FFT analysis of the headbox pulsation, and foils activity. PaperCon 2011 Page 164
Reliability Matter. Precision by Design FiberScan Gamma Scattering Tech 4500 500 4500 500 4000 450 4000 450 3500 400 3500 400 gr/m2 3000 2500 2000 1500 350 300 250 200 150 std. dev test 1 test 2 test 3 test 4 test 5 test 6 std.dev gr/m2 3000 2500 2000 1500 350 300 250 200 150 std. dev test 1 test 2 test 3 test 4 std dev 1000 100 1000 100 500 50 500 50 0 0 0 5 10 15 0 0 0 5 10 15 PaperCon 2011 Page 165
New Measurement Points Available 3 4 PaperCon 2011 Page 166
High Speed FFT Analysis Fan Pump Problems Paper picture showing a transversal barring defect PaperCon 2011 Page 167
High Speed FFT Analysis FFT spectrum @ point 1 A B C 1 2 3 4 5 FFT spectrum @ point 2 Picture of the Top Former where the FFT analysis was conducted PaperCon 2011 Page 168
High Speed FFT Analysis FFT spectrum @ point 3 A B C 1 2 3 4 5 FFT spectrum @ point 4 Picture of the Top Former where the FFT analysis was conducted PaperCon 2011 Page 169
% dryness after the top f Drainage Effect on Wire by Retention Aid Type & Dilution The following graphs show how the chemical dosage effect on sheet consistency after the top former unit. Very easy to understand the optimal dosage of the chemical. 21 20,8 20,6 20,4 20,2 20 19,8 19,6 19,4 19,2 19 0 0,5 1 1,5 2 2,5 3 3,5 kg/t 8694 8591 Poli. (8694) Poli. (8591) 8694 Dosage Dryness Ratio Delta % 0 19,29-0,669413-0,13 0,5 20,07 3,34706488 0,65 1 20,38 4,94335736 0,96 1,5 20,45 5,3038105 1,03 2 20,34 4,73738414 0,92 1,5 20,34 4,73738414 0,92 3 19,32-0,5149331-0,10 0,25 20,34 4,73738414 0,92 0 19,16-1,338826-0,26 0,25 19,87 2,31719876 0,45 8591 0,25 20,88 7,51802266 1,46 0,5 20,17 3,86199794 0,75 0 20,55 5,81874356 1,13 0,125 19,84 2,16271885 0,42 PaperCon 2011 Page 170
FiberScan Consistency vs Grammage, Vacuum, Steam Suction roll Vacuum (bar) Consistency (%) Steam Pressure (bar) Water Mass (gr/m2) PaperCon 2011 Page 171
PermFlowDUOFIX on-line Multiple Meter The PermFlowDUOFIX diagnostic meter allows to: Scan press fabrics CMD moisture trends, therefore the machine efficiency and paper quality; Scan press fabrics CMD water permeability to find out clogging bands, therefore the machine efficiency; Scan press fabrics CMD surface temperature, to monitor the work of the steam boxes if present, and find dangers fiber degradation; The system can be installed on the tail-cutter transversal beam of the paper machine, for CMD scans of the press fabric moisture, permeability and temperature; PaperCon 2011 Page 172
PermFlowDUOFIX On-line Moisture & Permeability Meter Flow sensor Digital Bus & power Water inlet Moisture & temp sensor PaperCon 2011 Page 173
PermFlowDUOFIX Advanced Multiple Meter: Features Moisture sampling rate 2048 sample/sec. A world record, the best resolution when conducting FFT pulsation & vibration studies: Water permeability sampling rate 512 samples/sec, more than 2 times the actual permeability meters; Fabric surface temperature 512 samples/sec; Digital data bus for machine DCS connection; Fully digital sensor, for maximum data reliability; Waterproof IP68 level. PaperCon 2011 Page 174
PermFlowDUOFIX Experience @ Soporcel ATF Soporcel About the Future, Portugal. New PM4, 11,5m wide, 2000m/min. 3 PermFlowDUOFIX sensors installed. Started-up August 15th, 2009. PaperCon 2011 Page 175
PermFlowDUOFIX Sensors @ Soporcel ATF PM9 Pick up PermFlowDUOFIX Sensors DCS permeability & moisture profiles PaperCon 2011 Page 176
gr/m2; ml/min C 1 25 49 73 97 121 145 169 193 217 241 265 289 313 337 361 385 409 433 457 481 505 gr/m2; ml/min C PermFlowDUOFIX Moisture & Water Permeability Profiles 800 750 700 650 600 550 500 PermFlowDuo Trends Moisture gr/m2 permeability ml/min Felt surface temp 75 65 55 45 35 25 15 cm 800 750 700 650 600 550 500 PermFlowDuo Trends Moisture gr/m2 permeability ml/min Felt surface temp 75 65 55 45 35 25 15 PaperCon 2011 Page 177
Thank you for your attention! PaperCon 2011 Page 178