Title

15 Liquid Polymer Pumps Shutdown

The Belt Press Filter cannot operate without polymer conditioning. If the Dry Polymer System is out of service, the Liquid Polymer System must be put into service in order to continue the sludge dewatering process.
 

Verify that the Dry Polymer System is operable before shutting down the Dry Polymer System.

 

The Liquid Polymer System is typically used only when the Dry Polymer System is out of service. Liquid polymer is fed by one constant speed feed pump – there is no standby liquid polymer pump.
SOP Identification Number
SOP Identification Number:
1507_Liquid Polymer Pumps Shutdown
Health & Safety Warnings
Health & Safety Warnings:

Watch for open tanks and high elevations. If working on or near equipment, watch for rotating parts. 

Cautions
Cautions:
  • Loss of polymer will impact flocculation of dewatering process.   
Personnel Qualifications
Personnel Qualifications:


Operator I, knowledge of dewatering process and equipment controls.

Equipment, Supplies, Required Tools
Equipment, Supplies, Required Tools:

Portable mixer for polymer tote and access to electrical outlet.

Quality Control/Quality Assurance Activities for the Procedure
Quality Control/Quality Assurance Activities for the Procedure:
  • Record activity to log book.
Procedure
Procedure:

The Belt Press Filter cannot operate without polymer conditioning. If the Dry Polymer System is out of service, the Liquid Polymer System must be put into service in order to continue the sludge dewatering process.  Verify that the Dry Polymer System is operable before shutting down the Liquid Polymer System.

The Liquid Polymer System is typically used only when the Dry Polymer System is out of service. Liquid polymer is fed by one variable speed feed pump {tag no. 1507PMP/MTR/VFD5600} – there is no standby liquid polymer pump.

1.     Stop Liquid Polymer Feed Pump.

a.     Locate the Liquid Polymer Feed Pump Controller {tag no. 1507LCP5723} .

b.     Turn the HOA switch {tag no. 1507HS5723} to OFF.

2.     Close Discharge Valve

a.     Close the discharge valve {tag no. 1507VLV5724 &1507VLV5724C} associated with the Belt Filter Press that is currently in operation.  These unmarked valves are located on vertical pipes located on the east interior wall of the Dewatering Building.  The pipes are labeled “BP #1” and “BP#2”.

3.     Close Suction Valves

a.     Close the Polymer Tote Valve {tag no. 1507VLV5600}

4.     Close Recycled Water Supply.

a.     Locate and close the Recycled Water valve {tag no. 1507VLV5395} on the suction side of the Liquid Polymer System. This unmarked valve is located on a vertical Industrial Water pipe on the north interior wall of the Dewatering Building.

5.     Remove Polymer Mixer

a.     Unplug the Portable Polymer Mixer {tag no. 1507MXR5694} from the nearest electrical outlet.

b.     Remove the Portable Polymer Mixer {tag no. 1507MXR5694} from the tote.

6.     Clean the Polymer Mixer

a.     Close the Polymer Tote Valve {tag no. 1507VLV5600}.

b.     Leave the Polymer Pump {tag no. 1507PMP/MTR/VFD5600} running.  Leave the dilution water on.

c.     Open the Discharge Valve {tag no. 1507VLV5724 & 1507VLV5724C}. This will help clean the mixer and the discharge lines.

d.     When the flushing is complete, turn off the Polymer Pump {tag no. 1507PMP/MTR/VFD5600}, turn off the dilution water, and close the Discharge Valve {tag no. 1507VLV5724 & 1507VLV5724C}.

 

Data & Records Management, Calculations, Forms, Reports
Data & Records Management, Calculations, Forms, Reports:
  • Update log book.
  • Update maintenance records (if applicable).
  • Report any maintenance or attention that is required.
Equipment
Equipment:

EQUIPMENT NAME

TAG NUMBER

Liquid Polymer Pump

1507PMP5600

Liquid Polymer Pump Motor

1507MTR5600

Liquid Polymer Pump Variable Speed Drive

1507VFD5600

Liquid Polymer Pump Controller

1507LCP5723

Liquid Polymer Pump HOA Switch

1507HS5723

Discharge Valve

1507VLV5724

Discharge Valve

1507VLV5724C

Recycled Water Valve

1507VLV5395

Polymer Tote Valve

1507VLV5600

Portable Polymer Mixer

1507MXR5694

ID
Maintenance Connect