Overhauling of Air pre heater B

Opening of all manhole doors & closing manhole doors after completion of work including changing of asbestos ropes and clamps in the doors.

Removal of Ash deposit inside the APH.

Dismantling of APH T-bars at hot end side located at our board of sector plate, by removing of fasteners using special tools and gas cutting of jammed fasteners and re-assembling of T-bars after the erection of a new hot end sector plate.

Dismantling of hot end rotor post seal by gas cutting from guide bearing spool piece at in board without damaging the guide bearing spool piece by providing proper supports at inside of the APH on flue gas side, primary air side and secondary air side and re-erection of hot end rotor post seal in position by welding with guide bearing spool piece at in board.

Marking and gas cutting of Air Pre Heater Flue gas/PA/SA shell body mother plate with chain block support at insulation removed location for required size to facilitate to dismantling of existing Axial Seal Plate and erection of a new Axial Seal Plate through this APH Flue gas/PA/SA shell body mother plate and re-erection of the mother plate after renewal of Axial Seal Plate.

Arresting of existing wornout Axial seal plate by chain block and hydraulic jack after removing of adjuster screws, lowering of existing wornout Axial seal plate gradually and releasing of chain block supports and drawing outside of Air Pre Heater through the opening made in Air Pre Heater PA/SA/flue gas side shell body mother plate, leading and lowering of removed worn-out Axial seal plate from 19.15mtr Air Pre Heater floor level to '0' mtr boiler floor by means of motor operated winch, transporting and devoluting to store.

Erection of a new Axial seal plate, this work includes transporting of axial plate from store to site, leading and lifting of a new Axial seal plate from '0'mtr boiler floor to 17mtr Air Pre Heater floor level by means of motor operated winch and inserting the new Axial seal plate through the PA/SA/flue gas shell body mother plate opening by means of chain blocks support, placing the Axial seal plate to the existing wornout Axial seal plate removed location and re-assembling the new Axial seal plate in position as per standard procedure and aligning of axial plate as per the standard alignment protocal.

Cutting and removing of bracing support pipes at APH flue gas hot end side / New re-erection of removed bracing pipes by welding in position after the erection of new hot end sector plate.

Arresting of existing wornout Hot end spool by chain block and hydraulic jack after removing of Hot end sector plates from its position, removing of existing wornout Hot end spool gradually and releasing of chain block supports and drawing outside of Air Pre Heater through the manual door, leading and lowering of removed worn-out Hot end spool from 19.15mtr Air Pre Heater floor level to '0' mtr boiler floor by means of motor operated winch, transporting and devoluting to store.

Erection of a new Hot end spool, this work includes transporting of Hot end spool from store to site, leading and lifting of a new Hot end spool from '0'mtr boiler floor to 17mtr Air Pre Heater floor level by means of motor operated winch and inserting the new Hot End Spool through the manual door by means of chain blocks support, placing the Hot End Spool from its original position and re-assembling the hot end sector plate from its original position as per standard procedure and aligning of Hot end spool as per the standard alignment protocal.