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Cristini Diagnostic Systems

Cristini Group

Paper Machine

Clothing

Department of physics of the

microwave, University of

Florence

Cristini Diagnostic Systems

PaperCon 2011 58

Microwave

Diagnostic Instruments Line

FiberScan

ONE™

PresScan™

MKIVPermFlow™

PermFlow

DUOFIX™

Instrument

Machine section Forming SectionPress

Section

Press

Section

Press

Section

Installation

typePortable, 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.


Planar Sensor

Microwave Emission

EY component of the near EM field

on a transverse x cut plane

FiberScan™

Planar sensor

Water thickness

ElectroMagnetic

field


FiberScanONE™ Microwave

Consistency Meter

Microwave

Sensor

Telescopic

PoleControl unit,

OLED display

BlueTooth™

Data

transmission


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 analysistrough FFT filtration of the MD consistency profile. With a sampling speed of 1024Hz FiberScan™ is the fastest consistency meter on the market.


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.


FiberScan

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 5 10 15

gr/

m2

0

50

100

150

200

250

300

350

400

450

500

std

. d

ev

test 1

test 2

test 3

test 4

test 5

test 6

std.dev

Gamma Scattering Tech

0

500

1000

1500

2000

2500

3000

3500

4000

4500

0 5 10 15

gr/

m2

0

50

100

150

200

250

300

350

400

450

500

std

. d

ev

test 1

test 2

test 3

test 4

std dev

Reliability Matter.

Precision by Design


New Measurement

Points Available

3

4


Paper picture showing a transversal barring defect

High Speed FFT Analysis

Fan Pump Problems


FFT spectrum @ point 1

A B C

1 2 34

5

Picture of the Top Former where the FFT analysis was conducted




A B C

1 2 34

5

Picture of the Top Former where the FFT analysis was conducted





Drainage Effect on Wire by

Retention Aid Type & Dilution

19

19,2

19,4

19,6

19,8

20

20,2

20,4

20,6

20,8

21

0 0,5 1 1,5 2 2,5 3 3,5

kg/t

% d

ryn

ess a

fter

the t

op

f

8694

8591

Poli. (8694)

Poli. (8591)

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.

8694

Dosage Dryness Ratio Delta %0 19,29 -0,669413 -0,13

0,5 20,07 3,34706488 0,651 20,38 4,94335736 0,96

1,5 20,45 5,3038105 1,032 20,34 4,73738414 0,92

1,5 20,34 4,73738414 0,923 19,32 -0,5149331 -0,10

0,25 20,34 4,73738414 0,920 19,16 -1,338826 -0,26

0,25 19,87 2,31719876 0,45

85910,25 20,88 7,51802266 1,460,5 20,17 3,86199794 0,75

0 20,55 5,81874356 1,130,125 19,84 2,16271885 0,42


FiberScan™ Consistency

vs Grammage, Vacuum, Steam

Suction roll

Vacuum (bar)

Consistency

(%)

Steam Pressure

(bar)

Water Mass

(gr/m2)


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;


PermFlowDUOFIX™ On-line

Moisture & Permeability Meter

Flow

sensor

Moisture

& temp sensor

Digital

Bus & power

Water

inlet


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 4

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.


PermFlowDUOFIX™ Sensors

@ Soporcel ATF PM9

Pick up PermFlowDUOFIX™ Sensors DCS permeability & moisture profiles


PermFlowDUOFIX™ Moisture

& Water Permeability Profiles

PermFlowDuo Trends

500

550600

650

700750

800

1 25 49 73 97 121

145

169

193

217

241

265

289

313

337

361

385

409

433

457

481

505

cm

gr/m

2; m

l/min

15253545556575

°C

Moisture gr/m2permeability ml/minFelt surface temp

PermFlowDuo Trends

500

550

600

650

700

750

800

gr/m

2; m

l/min

15

25

35

45

55

65

75

°C

Moisture gr/m2permeability ml/minFelt surface temp


Thank you

for your attention!


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