OPTIMUM COMBINATION OF CARBON DIOXIDE ABSORBENT AND SCRUBBER CANISTER FOR MISSION AND EMERGENCY USE IN SUBMERSIBLE DIVER LOCKOUT 1 (SDL-1)

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Authors
  1. Frew, J.
  2. Eaton, D.J.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
During the recent refit of the Canadian Forces diving submersible, SDL-1, the existing carbon dioxide absorbent system needed replacement and a number of alternatives were available. A group of experiments were conducted to select the optimum alternative. Independent variables considered were: (a) absorbent type, lithium hydroxide (LiOH) or soda lime; (b) scrubber canister flow configuration, axial or radial. Dependent variables measured included: (a) capacity to absorb carbon dioxide; (b) compatiability of absorbent with the scrubber; (c) relative hazard during absorbent use and handling; and (d) effect of storage-time on capacity to absorb carbon dioxide. The experiments also examined the performance of a prototype filter to reduce the dust hazard during scrubber operation. The radial flow canister provided greater carbon dioxide absorption than the axial flow design. Both LiOH and soda lime were compatible with the radial flow canister but the combination of LiOH in the radial flow canister achieved the highest carbon dioxide absorption. However, this alternative created a severe hazard since air passing through the absorbent spread caustic LiOH dust throughout the simulated crew compartment. Installation of the prototype filter reduced the dust problem but also significantly reduced the carbon dioxide absorption efficiency. TRUNCATED
Keywords
Soda lime;Exposure limits
Report Number
DCIEM-95-16 — Technical Report (Final)
Date of publication
01 May 1995
Number of Pages
28
DSTKIM No
95-04384
CANDIS No
152600
Format(s):
Document Image stored on Optical Disk;Hardcopy

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