silo 3 - U.S. Department of Energy

- B-2 'fi'
2.1.5 'Pneumatic Retrieval Collector Discharge Feeder (FDR-10-5104)
Process Description for the Silo 3 Project
Document No. 40430-RP-0003, Rev. 1
Jacobs Project NO. 35H19605
September 5, 2003
5069
The Pneumatic Retrieval Collector Discharge Feeder is a variable-speed screw conveyor
that receives Silo 3 material from both the Pneumatic Retrieval Collector and the Cartridge
Filter. The feeder then transports the material to the Feed Conveyor via the Primary and
Secondary Rotary Feeders (see Section 2.1.6). The feeder uses a variable-pitch, variable-
shaft-diameter screw to ensure uniform material pickup along the entire length of the
hopper.
2.1.6 Primary and Secondary Rotary Feeders (ROF-I 0-51 08 and ROF-10-5110)
The Primary and Secondary Rotary Feeders serve as the transfer points between the
Pneumatic Retrieval Collector Discharge Feeder and the Feed Conveyor. They act as
airlocks between the collector's relatively high vacuum and the Feed Conveyor, which is
under a slight negative pressure.
2.1.7 Feed Conveyor (FDR-10-51021
The Feed Conveyor receives Silo 3 material from the PRS via the Secondary Rotary Feeder,
and from the Mechanical Retrieval System via the Inclined Conveyor (see Section 2.2.2)
and Transfer Conveyor (see Section 2.2.3).
The conveyor discharges material to both Package Loading Stands (see Section 3.3).
2.1.8 Auxiliary Vacuum Blower (BLR-10-5008)
On an as-needed basis, the Pneumatic Retrieval Blower provides utility vacuum removal of
material from the Fines Collection Bins in the Process Vent System (PVS) (see Section
4.4.2) and utility service at the Container Management System (see Section 3.3).
If the PRS is not in operation, both the capacity and draft of the Pneumatic Retrieval
Blower make it impractical to operate for the sole use of these low-volume, periodic users.
Instead, the Auxiliary Vacuum Blower (BLR-10-5008) is brought on line to supply the
needs of these other systems. The Auxiliary Vacuum Blower pulls contaminated air
through the same air-cleaning equipment as does the Pneumatic Retrieval Blower.
2.2
MECHANICAL RETRIEVAL SYSTEM (SYSTEM 11)
The following PFD and P&ID illustrate the MRS:
94X-3900-F-01429 F0002 Material Retrieval and Feed Systems
94X-3900-F-02369 NO099 Silo 3 Access
94X-3900-N-01433 NO 100 Mechanical Retrieval System
94X-3900-N-01435 NO102 Feed System
The MRS comprises the following equipment:
0 EXC-11-5050: Excavator
EAR-11-5052: Retrieval Bin Register
0 EAR-11-5053: Excavator Room Register
0 HBN-11-5054: Retrieval Bin
0 DFC-11-5056: Inclined Conveyor
2-3
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