B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
183/2
B01D 53/22 (2006.01) C01B 3/50 (2006.01) G08B 17/117 (2006.01)
Patent
CA 1190485
Abstract of the Invention An apparatus for safely purifying hydrogen gas, comprising: a hydrogen gas diffusion cell for filtering hydrogen gas, the cell having an input for hydrogen gas to be purified, an output for ultrapurified hydrogen gas and an output for waste gas, including hydrogen gas and concentrated corrosive agents; an electrical power supply for heating the diffusion cell to an elevated operating temperature; an electrical circuit for detecting hydrogen gas, disposed adjacent the diffusion cell and the input and outputs, and for generating a command signal when hydrogen is detected; an electrically activatable valve disposed in and controlling the hydrogen gas input, operable in response to the command signal; and, an electrical switch for disabling the electrical power supply in response to the command signal, whereby the apparatus will be rendered completely inoperative before explosive levels of hydrogen gas can accumulate. The apparatus may further comprise an over-temperature sensing switch for disabling the electrical power supply. A method for preventing explosions in apparatus for purifying hydrogen gas, as described, comprises the steps of: continuously sensing for the presence of hydrogen gas adjacent the diffusion cell and the input and outputs; and, shutting the gas input and disabling the electrical power supply whenever hydrogen gas is detected in a concentration greater than a predetermined amount, preferably ten percent of the lower explosive limit. The method may further comprise the step of disabling the electrical power supply whenever the temperature outside of the gas diffusion cell exceeds a predetermined level.
428522
Consolidated Technology Corporation
Goudreau Gage Dubuc
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