Nebulization reflux concentrator
First Claim
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1. Apparatus for removing trace constituents from a gas comprising, in combination:
- a nebulizing vessel having an inlet and an exit,a reservoir of gas absorbing liquid solvent contained within said nebulizing vessel,an atomizing nozzle positioned inside said vessel in fluid communication with said vessel inlet and terminating above the level of said reservoir of gas absorbing liquid,a tubular gas inlet leading from a gas supply and disposed in sealed fluid communication with said vessel inlet and said atomizing nozzle,an open ended siphon tube attached parallel to said atomizing nozzle and having a first open end thereof disposed within said reservoir of liquid solvent and a second reduced diameter open tip end disposed adjacent the tip of said atomizing nozzle,a filter housing sealingly connected at one end thereof to said nebulizing vessel exit and in operative spaced relationship to said exit to preclude passage of gas except through said filter,a liquid solvent-phobic filter disposed within said filter housing, said filter being positioned so as to be in the path of any gas exiting from said vessel and serving to trap any liquid solvent coming in contact therewith while permitting gas flow to exit therethrough,an end closure for said filter housing and having an exit port therein permitting gas passing through said filter to exit from said apparatus,a top plate circumferentially sealed to and closing the end of said filter housing opposite to the end thereof connected to said nebulizing vessel,said top plate having an exit therethrough for removal of the gas filtered by said liquid solvent-phobic filter,a conical wire mesh screen disposed within said filter housing operatively spaced across said nebulizing vessel exit,said conical wire mesh screen serving as support structure for said liquid solvent-phobic filter with said filter mounted on the internal side of said screen forcing all egressing gas through said filter, wherebygas received from the gas supply travels through said tubular gas inlet to said atomizing nozzle and upon exit from said nozzle siphons liquid solvent from said reservoir to entrain the gas into a mist with the liquid soluble trace constituents in the gas flow going into solution, and the trace constituent free gas passing through said filter as the liquid droplets from the mist coalesce onto said filter and fall back into said reservoir.
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Abstract
A nebulization reflux concentrator 10 for removing trace gas contaminants from a sample gas is disclosed. Sample gas from a gas supply 40 is drawn by a suction source 42 into a vessel 11. The gas enters vessel 11 through an atomizing nozzle 16, thereby atomizing and entraining a scrubbing liquid solvent drawn through siphon tube 22 from a scrubbing liquid reservoir 21. The gas and entrained liquid rise through concentrator 10 and impinge upon a solvent-phobic filter 28, whereby purified gas exits through filter 28 and contaminated liquid coalesces on filter 28 and falls into reservoir 21.
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Citations
2 Claims
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1. Apparatus for removing trace constituents from a gas comprising, in combination:
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a nebulizing vessel having an inlet and an exit, a reservoir of gas absorbing liquid solvent contained within said nebulizing vessel, an atomizing nozzle positioned inside said vessel in fluid communication with said vessel inlet and terminating above the level of said reservoir of gas absorbing liquid, a tubular gas inlet leading from a gas supply and disposed in sealed fluid communication with said vessel inlet and said atomizing nozzle, an open ended siphon tube attached parallel to said atomizing nozzle and having a first open end thereof disposed within said reservoir of liquid solvent and a second reduced diameter open tip end disposed adjacent the tip of said atomizing nozzle, a filter housing sealingly connected at one end thereof to said nebulizing vessel exit and in operative spaced relationship to said exit to preclude passage of gas except through said filter, a liquid solvent-phobic filter disposed within said filter housing, said filter being positioned so as to be in the path of any gas exiting from said vessel and serving to trap any liquid solvent coming in contact therewith while permitting gas flow to exit therethrough, an end closure for said filter housing and having an exit port therein permitting gas passing through said filter to exit from said apparatus, a top plate circumferentially sealed to and closing the end of said filter housing opposite to the end thereof connected to said nebulizing vessel, said top plate having an exit therethrough for removal of the gas filtered by said liquid solvent-phobic filter, a conical wire mesh screen disposed within said filter housing operatively spaced across said nebulizing vessel exit, said conical wire mesh screen serving as support structure for said liquid solvent-phobic filter with said filter mounted on the internal side of said screen forcing all egressing gas through said filter, whereby gas received from the gas supply travels through said tubular gas inlet to said atomizing nozzle and upon exit from said nozzle siphons liquid solvent from said reservoir to entrain the gas into a mist with the liquid soluble trace constituents in the gas flow going into solution, and the trace constituent free gas passing through said filter as the liquid droplets from the mist coalesce onto said filter and fall back into said reservoir. - View Dependent Claims (2)
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Specification
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Current AssigneeUnited States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
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Original AssigneeUnited States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
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InventorsCollins, Vernon G., Cofer, Wesley R. III
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Primary Examiner(s)Nozick, Bernard
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Application NumberUS06/668,432Time in Patent Office589 DaysField of Search55/68, 55/70, 55/71, 55/73, 55/97, 55/85, 55/90, 55/270, 55/255, 55/259, 55/521, 55/528, 261/78 A, 239/338, 73/863.21US Class Current96/363CPC Class CodesG01N 1/22 in the gaseous state specia...G01N 33/0014 by eliminating a gas by a c...
