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Coal Conveyor in High Temperature Environment in Power Plant

Application Description

A power plant has a coal conveyor located in a high temperature environment. This conveyor feeds a boiler in the power plant, the steam from which powers turbines used for electric power generation. If the conveyor stops abruptly, down time could be very costly due to lost electrical generation, extensive material clean up, and possible equipment damage.
Coal Conveyor in High Temperature Environment in Power Plant, Phares Electronics Zero Speed Switches For Conveyors Tech Notes

Solution 1: Phares ZS10 Zero Speed Switch System

Mount a Phares Magnetic Disk at the point of measure on the conveyor, align a Phares Digital Output Hall Effect Sensor to the disk. Wire the sensor to a Phares ZS10 Motion Detector Module which is located away from the high temperature zone. When the conveyor stops abruptly, the ZS10 responds within 1 second enabling the conveyor ‘stop’ circuit reducing downtime and expense.

Solution 2: Phares T6 Tachometer System

Mount a Phares Magnetic Disk at the point of measure on the conveyor, align a Phares Digital Output Hall Effect Sensor to the disk. Wire the sensor to a Phares T6 Tachometer which is located away from the high temperature zone. When the conveyor stops abruptly, the Phares T6 Tachometer responds promptly enabling the ‘stop’ circuit for the conveyor drive motor, minimizing down time and preventing the problem from compounding.

The Phares T6 Tachometer’s 0-10V and/or 4-20mA feedback signal is sent to a PLC, or DCS updating conveyor speed status. This is particularly effective for early detection of a problem before it occurs. If the speed begins to decrease, this can indicate an unwanted increase in the load on the conveyor. When the 0-10V and/or 4-20mA signal reaches a particular level, the PLC, or DCS can send an alert indicating a potential problem.

Early detection improves production significantly as conveyor problems are prevented from compounding, thus reducing downtime and expense.


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Coal Conveyor in High Temperature Environment

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