15 Belt Press Shutdown
The dewatering system is turned off by the swing shift operators before the end of their shift. The systems are turned back on in the morning when the day shift arrives. The lead and standby BFPs are rotated every month.
Watch for open tanks and high elevations. Exercise caution when using the stairs. If working on or near equipment, watch for rotating parts.
Operator I, knowledge of dewatering process and equipment controls.
Hose and nozzle for washing and daily maintenance activities.
- Record activity to log book.
The dewatering system is turned off by the swing shift operators before the end of their shift. The systems are turned back on in the morning when the day shift arrives. The lead and standby BFPs are rotated every month.
1. Open Belt Filter Press Sludge Drain Valve.
a. Open BFP Drain Line valve {tag no. 1506VLV5181A & 1506VLV5182B}. This will stop sludge from going to the belt press filter.
2. Stop Belt Filter Press {tag nos. 1506MTR5981 & 1506MTR5982}.
a. Locate the Belt Filter Press Central Control Panel {tag nos. 1506CCP5981 & 1506CCP5982} associated with the BFP unit to be shut off.
b. Turn the Dewatering Switch {tag nos. 1506HS5981G & 1506HS5982G} to the OFF position. Sludge pumping and other dewatering system will automatically stop.
c. Let the belt press and wash water continue running until the remaining sludge is dewatered.
3. Hose down and clean area.
a. Hose down all equipment from the upper platform. Spray around blades, sludge box, corners, etc., until sludge is rinsed away.
b. Hose down all equipment from the floor. Hose down the doctor blades, auger, etc. Clean all areas that sludge accumulates including the floor.
4. Equipment Shutdown. All equipment associated with the Belt Filter Press and dewatering must be shut down before the end of the swing shift.
a. Turn the Belt Filter Press HOA Switch {tag nos. 1506HS5981B & 1506HS5982B} to OFF.
b. After the Belt Filter Press stops running, turn the HOA Switch {tag nos. 1506HS5981B & 1506HS5982B} to HAND.
c. Start the Hydraulic Pump {tag nos. 1506PMP5100 & 1506PMP5200} at the Hand Switch {tag nos.1506HS5100 & 1506HS5200}.
d. Pull out the Cloth Tension Pins {tag no. 1506VLV5100A, 1506VLV5100B & 1506VLV5200A, 1506VLV5200B} to retract the hydraulic rams. Pins are located on the “upstairs”, east side of the BFP under the pressure gauges {tag no. 1506PI5100, 1506PI5100A & 150PI5200, 1506PI5200A}. Once the rams have retracted, stop the Hydraulic Pump {tag nos. 1506PMP5100 & 1506PMP5200} at the Hand Switch {tag nos.1506HS5100A & 1506HS5200A}.
e. Turn the Belt Filter Press HOA Switch {1506HS5981B & 1506HS5982B} back to OFF.
f. Push the Serpentix Conveyor E-Stop button {tag no. 1506HS5943D}.
g. Close the wash water valve {tag no. 1603VLV6282C}.
h. After the Belt Filter Press is offline and no tension is on the belt, pull the belt away from the ribs and spray down the interior.
- Update log book.
- Update maintenance records (if applicable).
- Report any maintenance or attention that is required.
|