VisiMix Conference /...
33
VisiMix Conference / Boston
Transcript of VisiMix Conference /...
VisiMix Conference / Boston
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Context of the engineering study
New proposal for a special vessel
Why?
New process and need of a glass-lined vessel
because of corrosion
Crystallization process
Risk of build-up on the wall
Thermal capacity of vessel very important
VisiMix Conference
Context of the engineering study
New proposal for a special vessel
Customer expectations:
- Scraping frequency
- Solids suspension
- Thermal capacity
VisiMix Conference
Context of the engineering study
New proposal for a special vessel
Manufacturer expectations:
- Technical challenge
- Process guarantee
- Design with VisiMix
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Definition of main parameters
Scraping frequency
Risk of crystals build up on the wall
Scraping required (between 0.5 and 1 Hz)
One solution : An anchor agitator with scrapers
Diameter of vessel: 2.4 m / diameter of anchor: 2.2 m
How many arms for anchor (2 / 3 / 4 )
It determines the speed rotation
VisiMix Conference
Definition of main parameters
Scraping frequency
Anchor agitator / Speed rotation
Large diameter (2.2 m)
Large height of agitator (5.6 m)
No guides on the bottom
Anchor agitator with 2 arms (average 25 rpm)
VisiMix Conference
Definition of main parameters
Solids suspension
Crystallization will create solids particles
- Special vessel with anchor agitator
- For a good solids suspension, we use VisiMix to
design the vessel with baffles and to know the
capacity of agitator to keep solids into suspension
VisiMix Conference
Definition of main parameters
Thermal capacity
To achieve the crystallization:
- Cooling capacity of 5 kW / m²
- Heat exchange area of 28 m²
- Maximal T between process fluid and thermal fluid
= 17 C
VisiMix Conference
Definition of main parameters
Thermal capacity
T between process fluid and thermal fluid < 17 C
Glass-lined vessel
Bad heat exchange because of thermal conductivity
of enamel
Enamel thickness very important
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Use of VisiMix for the design
Scraping frequency
Speed rotation defined => 25 rpm
But absorbed power could be a limitation
Why?
Pa = Np x x N3 x d5
VisiMix Conference
Use of VisiMix for the design
Scraping frequency
Definition of motor power
Pa = Np x x N3 x d5
Motor power is important for calculation of stresses and forces applied to agitator shaft
VisiMix enabless an estimation of absorbed power, soall definition of complete agitation is based on thesecalculations
VisiMix Conference
Use of VisiMix for the design
Solids suspension
Cristallization will create solids particles
- VisiMix parameters:
VisiMix Conference
Use of VisiMix for the design
Solids suspension
VisiMix Conference
Use of VisiMix for the design
Thermal capacity
Calculation of global heat exchange coefficient
Calculation of heat transfer rate
Q = K x S x T
VisiMix Conference
Use of VisiMix for the design
Thermal capacity
Calculation of global heat exchange coefficient withVisiMix
Adjustment with enamel thickness (in VisiMix = 1.2 mm)
Product convection coefficient and jacket coefficient have been calculated with VisiMix (agitation and halfcoil are the main parameters)
VisiMix Conference
Use of VisiMix for the design
Thermal capacity
Use of different VisiMix tools:
- Heat transfer rate
- Temperature of thermal fluid (inlet and outlet)
- Convection coefficient
- Heat transfer area
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Difficulties of manufacturing
VisiMix Conference
Technical challenge
Glass-lining is a complex and very sensitive process
Capacity of heaven
VisiMix calculation help us to design the vessel and anchor to match with customer expectation
VisiMix calculation gives us values for mechanicaldesign (with Ansys)
Manufacturing difficulties
VisiMix Conference
Manufacturing difficulties
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Run tests / VisiMix results
VisiMix Conference
Test from August 2010
PICT3457.MOV
Today’s status => vessel installed on final plant
1st test with crystals production
Absorbed power 20% higher with VisiMix
Run tests / VisiMix results
VisiMix Conference
Conclusion:
The use of VisiMix enables us to give process
guarantees and obtain the order!
The design was based on all these calculations and
now we can say that it is a real success.
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Engineering studies
Different types of VisiMix for De Dietrich
- Process scale-up and scale-down
- Process moved in other plants
- New process (definition of mixing system) => best
solution
- Modification of equipments
VisiMix Conference
Thibaut Etzel / De Dietrich Process Systems
I. Crystallizer designI. Context of the engineering study
II. Definition of main parameters
III. Use of VisiMix for the design
II. Crystallizer manufacturingI. Difficulties of the manufacturing
II. Run tests / VisiMix results
III. Other use of VisiMixI. Engineering studies
II. Designs of glass-lined and stainless steel vessels
VisiMix Conference
Design of glass-lined and stainless steel vessels
Use of VisiMix = best solution of agitation
Different types of process can be checked
- Solids dissolution
- Solids suspension
- Gas dispersion
VisiMix Conference
Conclusion
Partnership between De Dietrich and
VisiMix for 10 years
VisiMix = Design and marketing tool
Thank you very much
for your attention
VisiMix Conference
