Review and Assessment of Developmental Issues Concerning the Metal Parts Treater Design for the Blue Grass Chemical Agent Destruction Pilot Plant (2008) / Chapter Skim
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2 Metal Parts Treater System
2 Metal Parts Treater System
Pages 11-19
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From page 11... ...
Inlet and outlet air locks have mechanisms that are The Bechtel Parsons Blue Grass Team uses the acronym "OTM" to used to move trays and projectile racks in and out of each designate the off-gas treatment system attached to the MPT, and reserves the of the four MPT sections. Only the main chamber is heated.
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From page 12... ...
2-1 Blower Munition Body Treatment MDB Filters MPT redrawn Filter and MPT Off-Gas Heater Cyclone Ash Raw MPT "Condensate" Bulk Oxidizer Agent Contaminated MPT Neutralization "Condensate" Agent Heated Cleared MPT Hydrolysate Air "Condensate" Storage Natural Gas FIGURE 2-2 Current design of the off-gas treatment system for the metal parts treater. Source: Samuel Hariri, Process Design Lead, Bechtel Parsons Blue Grass Team, "Overview of the Blue Grass Chemical Agent Destruction Pilot Plant (BGCAPP)
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From page 13... ...
The steam and gases flow out of the the vent valve from the inlet air lock is closed, the air lock main chamber through a header in the top of the chamber nitrogen purge valve remains open, and the main chamber to the BOX unit along with purge gases from the inlet and in-gate remains closed. The MPT main chamber pressure is outlet air locks.
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From page 14... ...
Then, the inlet air lock is purged with nitrogen gas to remove any Prototype Testing of the Metal Parts Treater Technology gases that may have flowed from the main chamber to the inlet air lock when the in-gate was open. Purge gases from the The Bechtel Parsons Blue Grass Team (BPBGT)
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From page 15... ...
Because secondary waste are adequate. It is noted that the surrogate the prototype projectile trays also may have created some materials did not contain halogenated materials because of shadowing, the design of the trays for the full-scale MPT will restrictions in the TRRP MPT operating permit.
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From page 16... ...
chamber and air locks by ducting. The BPBGT has recog Normal industrial practice would call for each full-scale nized the potential for char and tar deposition in the ducting MPT to undergo, at a minimum, electrical and control system and has provided design features including increased insulatesting and mechanical and thermal functional testing at the tion of the off-gas ducting, trace heating of the ducting, and Parsons fabrication plant and then be disassembled, trans- duct design to allow inspection and cleaning.
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From page 17... ...
It is difficult to predict the mixing of preheated Each BOX is followed by a cyclone unit for the re- air with the process gas to obtain uniform flow through the moval of more than 90 percent of particulates smaller than structured matrix and to predict the mixing of the 1900oF 14 microns. These particulates may catalyze the formation gases with natural gas ahead of the saddles to minimize local of dioxins and furans and contaminate the downstream OTM hot spots and to ensure complete oxidation.
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From page 18... ...
If neither After passing through the cyclones, the off-gas is sent BOX unit is available, that is, if both MPTs are shut down to the venturi scrubber tower system common to both MPT or only secondary waste is being processed, the vent gases systems. The venturi scrubber tower can process gases from flow directly to the venturi scrubber.
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From page 19... ...
Condensate from moving gases from the MPT main chamber and air locks. the scrubber section above the venturi inlet to the tower is The blower has a variable frequency drive to accommodate added to the sump through the scrubber recirculation pump variable off-gas flows during MPT operations.
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