09-09-2013, 04:26 PM
RELIABILITY ENHANCEMENT OF PELLETISER UNIT
[attachment=57782]
OBJECTIVE
To increase the reliability of sulphur pelletizing unit by using PLC .
The solid state controllers are replaced with PLC .
Redundancy technique is used to increase the reliability of the unit.
PROBLEM ANALYSIS
The pump that sends the cooling water to conveyor may trip at any time due to various causes .
The pump failure in the plant is considered as single point failure which causes the whole plant to shut off.
The loading of sulphur pellets in the truck is done manually. The position of the truck under the SILO is watched and then the valve is opened by the person manually. This manual operation is made automatic.
FEASIBLE SOLUTION
Solid state devices are replaced by PLC which increases reliability and reduces cost.
The failure of pump is avoided by redunctancy.An alternative pump is used.When the operating pump faces a failure the control is transferred to another pump automatically.
The manual loading of sulphur pellets to the truck is replaced automatically using the proximity sensor.
[attachment=57782]
OBJECTIVE
To increase the reliability of sulphur pelletizing unit by using PLC .
The solid state controllers are replaced with PLC .
Redundancy technique is used to increase the reliability of the unit.
PROBLEM ANALYSIS
The pump that sends the cooling water to conveyor may trip at any time due to various causes .
The pump failure in the plant is considered as single point failure which causes the whole plant to shut off.
The loading of sulphur pellets in the truck is done manually. The position of the truck under the SILO is watched and then the valve is opened by the person manually. This manual operation is made automatic.
FEASIBLE SOLUTION
Solid state devices are replaced by PLC which increases reliability and reduces cost.
The failure of pump is avoided by redunctancy.An alternative pump is used.When the operating pump faces a failure the control is transferred to another pump automatically.
The manual loading of sulphur pellets to the truck is replaced automatically using the proximity sensor.