Maintenance report of Debris Filter
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The document summarizes maintenance work done on a debris filter from January 19-20, 2012. The debris filter was dismantled due to high pressure drop and debris not being removed. worn seals and sheared coupling disc bolts were found and replaced. The overhauled debris filter was then tested for 15 minutes and found to be in good working condition. Spare parts used during the maintenance are listed.
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Maintenance report of Debris Filter
- 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. DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 2/10
- 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. DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 3/10
- 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. DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 4/10
- 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. DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 5/10
- 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. DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 6/10
- 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 DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 7/10
- 8. January 19~20, 2012 DRAWINGS:DRAWINGS:- DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 8/10
- 9. January 19~20, 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 9/10
- 10. January 19~20, 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 DEBRIS FILTER MAINTENANCE REPORT 2012 10/10