Technical data

CHAP-03 BRIEF SYSTEM DESCRIPTION Page 7 of 20
The air blasting unit shall consist of air intake louver, transition piece,
centrifugal blasting fan, main duct and two numbers of branch ducts with
electrically operated dampers & flanges.
03.03.03.02 Arrangements and the Components:
The air intake louver of air blasting unit shall be installed in the opening
of wall exposed to ambient. This shall be connected to suction side of
blasting fan through transition piece. The delivery side of this fan shall
be connected to ducting network. The branch ducts (2 nos.) shall be
connected to both the coke deducting unit (CDU) chambers through the
flanges separately. There shall be two air stream/ paths, one working &
one standby, from air blasting unit to dust extraction unit, through CDU
chamber. The material flow in the CDU chambers conceptually shall be
perpendicular to the airflow of air stream from blasting unit to dust
extraction unit. Electrically operated dampers provided in the air stream
at the both sides of CDU chamber shall be interlocked with the operation
of CDU chambers; this is required to isolate the stand by CDU from air
stream and to take the working CDU into air stream of our above
system.
03.03.03.03 Functional Description
While running the CDU, air blasting unit fan shall suck ambient air
though air intake louver & transition piece and blast/ supply the air into
the CDU through the ducting network.
The working of the dust extraction unit shall suck the air dust laden air
including blasting air shall be sucked from CDU and hot/unburnt glowing
coke particles shall be collected in multiclone and spark arrestor placed
in the ducting network at the suction side of bag filter. The dust disposal
from bag filter, multiclone & spark arrestor shall be through discharge
into a central pneumatic system (through dust storage hopper).
However, central pneumatic system shall not be in the scope of
Contractor.
03.03.04 Major Facilities
03.03.04.01 The major scope of work of Coke Sorting Plant comprising of Coke
crushing station, coke screening station, coke breeze bunkers,
emergency coke storage yard, coke dedusting units, junction houses,
traveling tripper bridge, galleries and associated mechanical, civil,
structural, electrical works of COBP # 11 is given below: -
- 2 nos. grizzly screens (80mm), capacity 300 t/h.
- Grizzly shall be of Manganese steel casting DISC and the underpass
chute liners should be cast Basalt 110mm thick
- 2 nos. coke cutters (+80mm) capacity 180 tph.