silo 3 - U.S. Department of Energy

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a ” 4.0;. .. 5.2.1 Sodium Lignosulfonate Supply
Process Description for the Silo 3 Project
Document No. 40430-RP-0003, Rev. 1
Jacobs Project No. 35H19605
September 5, 2003
50 69
Sodium lignosulfonate is received as a 47% solution in portable, 400-ga1, high-density
polyethylene (HDPE) tote containers. A container is placed on a structural-steel frame in
the 10-in. concrete containment area in the northwest corner of the Cargo Container Bay.
The bottom outlet is piped to the suction side of the Sodium Lignosulfonate Pump, which
is a low-head, low-flow, helical gear pump designed for high-viscosity liquids. On an as-
needed basis, the pump transfers a predetermined quantity of the solution to the Additive
Mix Tank.
A spare sodium lignosulfonate tote is placed in the Sodium Lignosulfonate Portable
Containment Dike, a 400-gal capacity HDPE spill pallet.
5.2.2 Ferrous Sulfate Supply
Ferrous sulfate is received as a 15% solution in tanker trucks. The FeS04 Tanker Portable
Containment Dike is placed north of the Cargo Container Building when a shipment is
expected, and the tanker is spotted within the dike for unloading.
A pump located on the tanker truck, transfers solution into the Ferrous Sulfate Tank,
which is located in the 30-in. concrete containment area in the northwest corner of the
Cargo Container Bay. The tank is a 4500-gal fiberglass-reinforced plastic (FRP) vessel with
electric heat tracing and insulation. The Ferrous Sulfate Tank Agitator, along with internal
baffles, enhances heat transfer to prevent crystallization of the solution.
The tank’s bottom outlet is piped to the suction side of the Ferrous Sulfate Pump, which is
a low-head centrifugal pump with polymeric wetted parts (e.g., polypropylene). On an as-
needed basis, the pump transfers a predetermined quantity of the solution to the Additive
Mix Tank.
5.2.3 Process Water Supply
Process water is supplied to the Additive Mix Tank from a 2-in. header under line pressure.
A control valve (AOV-50-5002A) and flow-control loop are used to charge a
predetermined quantity of water to the tank.
5.2.4 Preparation and Transfer of Mixed Additive
Additive solution is prepared by mixing predetermined quantities of sodium lignosulfonate,
ferrous sulfate, and process water in the Additive Mix Tank’. This 1400-gal FRP tank is
located in the Wastewater Tank Area. The Additive Mix Tank Agitator, along with internal
baffles, homogenizes the mixture and keeps any solids in suspension. On an as-needed
basis, batches of additive solution are prepared as follows:
qhe Additive Mix Tank can also be set up to receive liquids from the Wastewater Tank Area Sump
(i.e., discharge of Wastewater Tank Area Sump Pump). Ordinarily, such liquids are transferred to
the Wastewater Tank (see Section 6.5); however, if a spill or leak originates in the Additive Mix
Tank andlor its downstream lines, and the sump is relatively free of other contaminants, Operations
may choose the mix-tank route. Both routes are set up by manual-valve alignment.
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