RHOSONICSRHOSONICS

In-line Concentration Analysis With Ultrasound

Presented By:

Willem Van B. De Jong

RHOSONICS PRODUCTSRHOSONICS PRODUCTS

U ltrason ic N D T:P iezo com p os ite sen sors

P u lser-rece ivers

G as an a lys isD en s ity

U trason ic in lin e an a lys isC on cen tra tion an a lys is

P artic le s ize & d is trib u tion

P rod u c t lin es

ULTRASONIC IN-LINE ANALYSIS MAIN ADVANGTAGESULTRASONIC IN-LINE ANALYSIS MAIN ADVANGTAGES

Based on wave propagation (movement of molecules)

Independent of conductivity

Independent of density

Independent of transparency

RHOSONICS: MAIN FEATURESRHOSONICS: MAIN FEATURES

Completely non-destructive

No moving parts

Absolute measurement (time)

In-line

Very high accuracy

PULSE-ECHO (REFLECTION) & TRANSMISSION PRINCIPLEPULSE-ECHO (REFLECTION) & TRANSMISSION PRINCIPLE

THE RHOSONICS LIQUID ANALYZERTHE RHOSONICS LIQUID ANALYZER

The Model 8100

The MCS-1-cell transmission system

The MP-130 measuring probe

The MP-54 measuring probe

MODEL 8100 – BENCH TOP MODELMODEL 8100 – BENCH TOP MODEL

THE FLOW-THROUGH CELLTHE FLOW-THROUGH CELL

MP-130-EX REFLECTION PROBEMP-130-EX REFLECTION PROBE

Explosion proof

2” and larger

In-line

Temp. compensation

8100 WITH MP-54 SENSOR8100 WITH MP-54 SENSOR

Sanitary

CIP-able

For Beer & drinks

Inline

Temp. compensation

MEASUREMENT OF SOUND VELOCITYMEASUREMENT OF SOUND VELOCITY

Principles

Block diagram

Time measurement

Speed calculation

Calculation of concentration from c, T

BLOCK DIAGRAM OF MODEL 8100BLOCK DIAGRAM OF MODEL 8100

TIME MEASUREMENT:TIME MEASUREMENT:BY DIGITIZED WAVEFORM ANALYSISBY DIGITIZED WAVEFORM ANALYSIS

MAGNIFIED WAVEFORMMAGNIFIED WAVEFORM

SPEED CALCULATIONSPEED CALCULATION

THE TRANSLATION OF ULTRASOUNDTHE TRANSLATION OF ULTRASOUND

Calculation of concentration

Sound speed curves of some liquids

CALCULATION OF CONCENTRATIONCALCULATION OF CONCENTRATION

Polynomial for % w/w, density, etc:

x = p0 + p1.c + p2.c2 + p3.c

3 + p4.t + p5.t

2 + p6.t.c + p7.t.c

2 + p8.t2.c

APPLIED TO HYDROCARBON LIQUIDSAPPLIED TO HYDROCARBON LIQUIDS

Sound speeds of some hydrocarbons

Composition of some C10…C60 samples

Sound speed curves of these samples

USED FOR

Conversion processes

In-line density

SOUND SPEEDS OF HYDROCARBONSSOUND SPEEDS OF HYDROCARBONS

CALIBRATION METHODCALIBRATION METHOD

Gather sound speed data:

• Sound velocities @ 25 temperatures

• Sound velocities @ 3 to 5 concentrations

Calculation of polynomial data (R)

Enter data into model 8100

Each set is called a “recipe”

EXAMPLE 2: NITRIC ACIDEXAMPLE 2: NITRIC ACID

EXAMPLE 3: SULPHURIC ACIDEXAMPLE 3: SULPHURIC ACID

EXAMPLE 4: ACETIC ACIDEXAMPLE 4: ACETIC ACID

EXPECTED RESOLUTION AC. ACID:EXPECTED RESOLUTION AC. ACID:

Change in c per %: 9.2 m/s/%

Change in c per ºC: 3.65 m/s/ºC

C accuracy: + 0.05 m/s

T accuracy: + 0.02ºC

Resulting in resolution of 100 PPM

EXAMPLE 5: AMMONIUM HYDROX.EXAMPLE 5: AMMONIUM HYDROX.

MAINTENANCEMAINTENANCE

Functional checks

Calibration

Cell replacement

Editing liquid parameters

TYPICAL ADVANTAGESTYPICAL ADVANTAGES

No moving parts

No drift

In-line

Highly accurate

FUNCTIONAL CHECKSFUNCTIONAL CHECKS

Sample check

Pure water check (checks both c & T)

Calibration of temperature circuit

Negligible drift of sound speed circuit

CALIBRATIONCALIBRATION

INSTRUMENT ELECTRONICS

Calibration of analog circuits:

• mA outputs

• PT100 inputs

PROBE

PT100 verification with water check

CELL REPLACEMENTCELL REPLACEMENT

NEW CELL - ENTRY OF NEW PARAMETERS:

Path length Dead time Temperature offset

ADVANTAGES:

Sensor is pre-calibrated Independent of liquid

EDITING LIQUID PARAMETERSEDITING LIQUID PARAMETERS

Liquid name

Liquid number

Polynomial constants

Field calibration factors

RHOSONICS ANALYSIS INSTRUMENTSRHOSONICS ANALYSIS INSTRUMENTS

YOUR PARTNER FOR ULTRASONIC IN-LINE CONCENTRATION ANALYSIS