maintenance procedure-slurry stripper trays removal
DESCRIPTION
this is the training on removing trays' bundle of Slurry stripping columnTRANSCRIPT
MAINTENANCE PROCEDURE
MUHAMMAD REHAN KHANMAINTENANCE ENGINEER
Slurry Stripping Column’s trays
removalCL-1G
WASTE WATER STRIPPER (CL-1G)
0 0 0
Top Shell
Tray Bundle
6728
• It contains 34 trays
• Column height is 19.5 m & diameter is 1.5 m
• Slurry enters from top at 90C & leaves from bottom at 110C
• About 10000 to 15000 PPM VCM is recovered from stripping column
• Total Column weight: 11,865kg
• Trays’ bundle weight: 2,690kg
• Top shell weight: 1,823kg
• Trays’ Material: 0Cr18Ni9
MAINTENANCE ACTIVITY
1. Scaffolding is constructed on top and mid platform2. Insulation cladding is removed from head cover and mid platform manway
JOB METHOD STATEMENT
3. Open manway on mid platform, remove associated piping and perform required blinding
Mid platform manway
MAINTENANCE ACTIVITY
4. Remove bolts of shell on mid platform
JOB METHOD STATEMENT
5. Park crane on the east side road of the equipment
MAINTENANCE ACTIVITY
6. Install slings on the lifting eyes at the top dome
JOB METHOD STATEMENT
7. Remove the top shell and placed it on ground
MAINTENANCE ACTIVITYJOB METHOD STATEMENT
MAINTENANCE ACTIVITY
8. Install a fabricated lifting jig on the top plate with the help of stud bolts
JOB METHOD STATEMENT
9. Attach Chain block to crane’s slings for slow lifting of the trays’ bundle
13 Stud Rods (0Cr18Ni9 and 52 Bolts of SS304)
MAINTENANCE ACTIVITY
10. Slowly lift the trays bundle until they will be free from the shell
JOB METHOD STATEMENT
11. Remove the complete trays’ bundle and placed it on ground
Clearance between shell and trays’ bundle is 2mm
MAINTENANCE ACTIVITY
12. Support the trays’ bundle with the help of scaffolding structure as shown
JOB METHOD STATEMENT
MAINTENANCE ACTIVITY
13. Cleaning and inspection of trays and shell is done
14. Both trays bundle and top shell are installed back
15. Associated piping and manway are boxed up
JOB METHOD STATEMENT
THANK YOU
MUHAMMAD REHAN KHANMAINTENANCE ENGINEER