Integrated Design of Alternative Technologies for Bulk-Only Chemical Agent Disposal Facilities (2000) / Chapter Skim
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2 Acquisition Design Package Processes and Modifications
2 Acquisition Design Package Processes and Modifications
Pages 6-11
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From page 6... ...
, are listed below: draining of HD from ton containers and removal of the residual agent by a series of hot water and steam sprays neutralization of the HD by hydrolysis using water in a stirred tank at a temperature just below the boiling point, followed by the addition of aqueous sodium hydroxide to neutralize acid formed during hydrolysis removal of VOCs from the resulting hydrolysate by vaporization in a falling film evaporator decomposition of condensed VOCs in an aqueous hydrogen peroxide and sodium hydroxide solution exposed to ultraviolet radiation on-site, federally owned treatment works for further biological and physical treatment prior to discharge. The sludge consists of excess biomass produced during the treatment of hydrolysate in the SBR.
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From page 7... ...
Bechtel's preliminary, revised design includes two packed stripper columns in parallel, followed by three carbon filters in series. The carbon filters recover both VOCs stripped from the hydrolysate and organic compounds in vapors released from the hydrolysate storage tanks.
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From page 8... ...
recommended by Bechtel, the contractor for Aberdeen Chemical Agent Disposal Facility (ABCDF) , using air stripping followed by vapor-phase activated carbon absorption, is an improvement over the VOC removal process described in the acquisition design package and should be incorporated into the final design of the ABCDF.
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From page 9... ...
During maintenance and decontamination operations, they must wear protective ensembles specific to the type of agent. Holding and Processing The chemical agent holding and processing arrangements for the ABCDF includes three identical processing lines, each of which includes the following components: a chemical agent holding tank and associated surge tank · two agent neutralization reactors a holding tank for effluent from the clean-out of ton containers a holding tank for effluent from the decontamination of ton containers a scrubber system, including a condenser and two carbon filters in series, for the neutralization of vent gas This equipment is housed in one cubicle for each processing line.
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From page 10... ...
At the NECDF, the vents of the four hydrolysate storage tanks are directed through a reflux condenser to a common vent cubicle, then to the activated carbon filters and the induced draft fans of the HVAC system, and finally to the plant stack. However, vent gases from the neutralization reactor for drained agent and the reactor for the effluent from the cleanout of ton containers in the two parallel neutralization cubicles at the NECDF are vented through a condenser to a single process ventilation cubicle.
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From page 11... ...
reported instances of agent migration at the Tooele and Johnston Atoll baseline incineration facilities. USE OF COMMON DESIGNS In the preceding section, the committee suggested that a common design for the agent holding and processing systems at the ABCDF and NECDF could be used, as well as common designs and equipment selections for other systems.
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