Alfa Laval Contherm 6X11, Инструкция по эксплуатации

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8 Inspection & Maintenance
8.7 Heat Exchanger Cylinder
The inside surface of the Contherms
™
heat exchange cylinder should be cleaned in place (CIP) as recommended in chapter 7,
section 7.11.1, Recommended Cleaning Guidelines. Periodic inspection of the cylinder and its media annulus should also be
performed to ensure the proper operation of the Contherm
™
and the long-term use of the cylinder. This section describes how
to inspect and maintain your Contherms
™
heat exchange cylinder.
8.7.1 Inspecting the Cylinder
The inside diameter of the heat exchange cylinder is a finely honed or chromed surface. It should be visually inspected on a
routine basis to assure the proper operation of the Contherm
™
. Use the procedure provided in Table 8-22 to inspect your
Contherms
™
heat exchange cylinder.
Table 8-22. Inspecting the Heat Exchange Cylinder
Step Action
1 First step is always to make sure there is no pressure, no fluid and no extreme temperatures present.
2
Remove the Contherms
™
lower head clamp (Part Number 7403038- 01) and lower the rotor, using the
hydraulic rotor lifting device.
Note: Refer to Table 7-4, Operating the Hydraulic Rotor Lift System, and Table 7-5, Operating the Rotor
Lift Helper Plate in Chapter 7.
3 After lowering the rotor from the Contherm
™
, inspect the walls of the cylinder for the presence of any
unusual pitting or scoring conditions.
4 Inspect the cylinder end that mates with the product head for any damage that may have been caused by
raising the rotor with the hydraulic lift system and a blade pin coming into contact with the cylinder end.
(there should be a series of photographs of various states of cylinder wear, showing what is normal
and expected, and then showing pitting, scoring, flaking, and scalloping.)
5 If any of the above conditions exist, please contact your local Alfa Laval Inc. representative for additional
assistance.
8.7.2 Replacing the Cylinder
If your inspection shows the need to replace the Contherms
™
heat exchange cylinder, refer to the disassembly procedure for the
Contherm
™
that is provided in Section 8.9, Disassembly and Re-assembly of the Contherm
™
.
Each replacement heat exchange cylinder is provided with a new inspection plate that identifies the new cylinder’s serial number,
and four drive screws (P/N 7402084-01) for mounting this new inspection plate to the outside surface of your Contherm
™
.
Before you mount the new inspection plate, you must remove the existing inspection plate from the Contherm
™
. To remove the
existing inspection plate, grind off the head of the four drive screws. Then remove the plate and pull out the remaining screw
shafts. The new plate is pre-formed at the factory and is to be attached directly to the Contherms
™
outside surface (trim sheet)
using the four, new drive screws that were supplied with the replacement cylinder.
8.7.3 Cleaning the Media Annulus
Due to contaminants that may exist in some water and steam supplies, fouling of the Contherms
™
media annulus may gradually
occur over time. At some point, this fouling, if it occurs, could begin to affect the Contherms thermal efficiency. Fouling is usually
caused by mineral deposits accumulating on the outer surface of the heat exchange cylinder. When present, these deposits can
be observed at the media inlet and outlet port connections.
Fouling can also be caused by oils in refrigerants.
To remove this fouling layer of mineral deposits, circulate a standard demineralizing agent throughout the annulus until the fouling
layer is removed. Table 8-23 identifies typical demineralizing procedures recommended by Alfa Laval Inc. for removing mineral
deposits from the outer surface of the cylinder.
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