Glasslined agitators with Cryo-Lock. Connection system

1.

Glasslined agitators
with Cryo-Lock
Connection system
P017-1e CryoLock Agitators.ppt Dipl.-Ing. H. Gramlich
Cryo-Lock Agitators 1

2.

Glasslined agitators with Cryo-Lock
connection system
Reasons for Cryo-Lock:
Tendency to reactors with small openings
Problem: Assembly of one-piece impellers
Former solution: Divided designs
Disadvantages:
Complicated constructions (expensive designs)
Limited divisibility (mixing technology)
Reduced safety in operation at the joints
(tightness, power transmission)
New solution: Cryo-Lock Principle!
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 2

3.

Glasslined vessels according to DIN
AE
P017-1e CryoLock Agitators.ppt
BE
CE
Cryo-Lock Agitators 3

4.

The Cryo-Lock Principle
Shrink-on connection between a fully glasslined agitator shaft
and the fully glasslined hub of the turbine
Gasket-free, corrosion-resistant, detachable agitator connection
Connection system
Supercool shaft by applying liquid nitrogen (-196 °C):
Shrinkage
Plug on or remove the agitator hub
Let agitator warm up to room temperature
Shrink-on fit
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 4

5.

The Cryo-Lock Principle
Demand on the connection: transferable
torque at least 8 times higher than the
max. admissable operating torque
Required tolerances are achieved through
honing of the shaft end and the agitator
hub
Principle can be applied to practically all
agitator types that can be glasslined
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 5

6.

The Cryo-Lock Principle
Manhole
1 Turbine
2 Agitator shaft
3 Honed surface
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 6

7.

The advantages of Cryo-Lock
Safety in operation
Increased safety in operation by
elimination of divided reactors resp.
assembly opening
Use of BE-type vessels with manhole
as biggest opening
i.e. saving of 2.5 m gasket length for a
BE 6300 compared to a CE 6300
Benefits:
higher vessel resistance to pressure
reduced leakage rates
use of asbestos-free gaskets
lower risk to incrustations at gaskets
gasket-free connection agitator/shaft
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 7

8.

The Advantages of Cryo-Lock
Cost reduction during operation & service
Increased availability through reduction of the
down times and easy service
rapid exchange of agitators without removing the
agitator shaft, drive, mechanical seal
all agitator types and the agitator shaft can be
removed through the manhole.
improved process results through wide variety of
agitator shapes.
reduced storage requirements through sharing of
agitators and different applications.
easy handling and transport.
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 8

9.

The Advantages of Cryo-Lock
Flexibility
Adaption of the agitators to the requirements of the
process through comprehensive agitator range
more agitator shapes
all agitator shapes can be combined on a single
shaft
BE reactors with Cryo-Lock have enough room for
additional or larger nozzles
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 9

10.

The Advantage of Cryo-Lock
Exchange of shafts through the manhole
All nozzles acc. to DIN DIN
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 10

11.

Agitator types and characteristics
Impeller
type RCI
Versatile general-purpose
design
High radial flow
Wider baffling necessary
Insensitive to viscosity
variations
Curved blade turbine
type CBT
High shear
Radial flow
with low-viscous fluids wider
baffling required
Suitable for low liquid levels,
small batches
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 11

12.

Agitator types and characteristics
Flat blade turbine
type FBT
High shear load
Pure radial flow
P017-1e CryoLock Agitators.ppt
Pitched blade turbine
type PBT
Moderate shear
Combined radial and axial flow
Relatively high drive speed
Cryo-Lock Agitators 12

13.

Agitator types and characteristics
Anchor
type ANC I
Single hub, low-blade design
Low shear
Tangential flow
High torque
For higher viscous fluids
P017-1e CryoLock Agitators.ppt
Two-piece anchor
type ANC II
Dual-hub, long blade design
Low shear
Tangential flow
High torque
For higher viscous fluids
Cryo-Lock Agitators 13

14.

Agitator types and characteristics
Multi-flight-impeller
Turbofoil high-performance
agitator type TBF
Low shear
High axial flow at relatively
low baffling
Low torques
Low power consumption
P017-1e CryoLock Agitators.ppt
type MFI
Several stages
Different shapes
Large diameters
possible
Customized
design
Cryo-Lock Agitators 14

15.

Velocity vectors
CBT
P017-1e CryoLock Agitators.ppt
TBF
Cryo-Lock Agitators 15

16.

Iso-energetic lines
CBT
P017-1e CryoLock Agitators.ppt
TBF
Cryo-Lock Agitators 16

17.

Velocity vectors
TBF-turbine 3-stages
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 17

18.

Iso-energetic lines
TBF-turbine 3-stages
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 18

19.

Efficiency of various Cryo-Lock types
Pumping capacity
Mixing time
P/V = constant
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 19

20.

Examples: Multi-stage agitators
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 20

21.

Examples: Multi-stage agitators
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 21

22.

Examples: Multi-stage agitators
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 22

23.

Example:
Agitator for residual
amounts
P017-1e CryoLock Agitators.ppt
Cryo-Lock Agitators 23