1. Debris Filter
(Cleaning Device For Closed Cooling Water)
Maintenance Report
January 19~20, 2012
Page
1
Prepared by
Ashik Ahmed
Maintenance Engineer
In a Multinational Power Plant
Email: ashik_rofy@yahoo.com,ashik.rofy@gmail.com
Mobile: +880-173-0059920

2. January 19~20, 2012
EQUIPMENT NO: AC-M-SR-001
EQUIPMENT NAME: DEBRIS FILTER
INTRODUCTION
Debris filter is used to protect heat exchanger tubes from cooling water
fragments. The debris filter is designed to automatically separate & remove
debris from cooling water during operation of the cooling system.
PROBLEM:
Debris filter D.P was high & debris was not coming from debris outlet nozzle.
DISMANTLING
DISMANTLING PROCEDURE
I.
II.
During the outage period the following works were carried out in debris filter:Debris filter manhole was opened. It was seen that the main shaft with injection
(spraying) arm were rotating (CW outlet side of the screen basket) but the collecting
arm was not rotating (CW inlet side of the screen basket).
The collecting arm & outlet pipes were dismantled.
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3. January 19~20, 2012
III.
IV.
The outlet bearing was found jam and dismantled.
The coupling (Outlet disc) disc bolts (M 16 six nos) were found sheared.
V.
VI.
The gear box, motor & front sealing was dismantled.
Drive shaft sealing disc was dismantled and the seals were found worn.
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4. January 19~20, 2012
ASSEMBLING PROCEDURE
The new M-16 bolts of drive shaft were quite a bit long so it was machined in
M/S Meghnaghat Power Plant work shop.
New seals were installed in drive shaft sealing disc & sealing disc cover
respectively.
The new outlet bearing was installed by hydraulic press in the MPL
workshop. After matching with the outlet pipe 01 mm clearance was found.
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5. January 19~20, 2012
The drive shaft with Injection arm, sealing disc were installed with new
gasket. The gap between the arm & basket was found 4 to 6 m. m. Some
portion of spraying water was leaking through the injection arm front side. It
was welded properly as well as some machining was done in the injection arm
flange to ease the installing procedure.
The gearbox with motor was then coupled with the drive shaft.
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6. January 19~20, 2012
The out let (Coupling) disc was installed by new M-16 Allen key bolts.
The out let bearing was installed after proper bearing alignment.
The out let pipe and the collecting arms were installed.
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7. January 19~20, 2012
After successful completion of the overhauling work the
overhauling
operated
.The
debris filter was operated for 15 minutes .The overall
good.
condition was found good.
CONSUMED SPARES:SPARES:Serial
01
02
03
Part No
AC-M-SR-001SEAL-02
AC-M-SR-001SlLVE-01
NEW CODE
REQUIRED
04
NEW CODE
REQUIRED
05
NEW CODE
REQUIRED
06
AC-M-SR-001SlLVE-02
07
AC-M-SR-001RING-01
(WS spare is not of
proper size)
08
AC-M-SR-001RING-01
(WS spare is not of
proper size)
AC-M-SR-001GSKT-02
09
Description
Qty Used
Qty to
Procure for
Future
Maintenance
U SEAL,PART NO 3206,
Dwg No:-- GI 829 201 05 057
SEAL (Lubron),PART NO 3207,
Dwg No:-- GI 829 201 05 057
Injection pipe seal ø125X110X12 mm ,
Part No- 3607
Dwg No:-- GI 829 201 05 061
Injection pipe seal ø75X63X8.7 mm , Part
No- 3617
Dwg No:-- GI 829 201 05 061
Injection pipe o-ring ID 350X T 5.3 mmø,
Part No-3606
Dwg No:-- GI 829 201 05 061
Outlet bearing (Lubron)
ø 152X139X60 mm , Part No- 3723
Dwg No:-- NA (Scanned copy could be
sent)
(V-Ring)
ø 161X141X146X35 mm ,
Part No- 3724 Dwg No:-- NA (Scanned
copy could be sent)
01
02
01
02
01 (From
Vendor)
01(01 is given by
vendor)
01 (From
Vendor)
01(01 is given by
vendor)
01 (From
Vendor)
01(01 is given by
vendor)
01
02
01
(Old One)
02
Screen basket (Lebrun) ID 103
01
(Old One)
02
Gasket
01
02
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8. January 19~20, 2012
DRAWINGS:DRAWINGS:-
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9. January 19~20, 2012
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10. January 19~20, 2012
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