Apparatus for the concentration reduction of a gas stream

Claim 2

Apparatus for reducing the concentration of a constituent of a fluid by a known fraction thereof, said apparatus comprising: an input conduit to receive the fluid; a filter adapted to remove the constituent from the fluid; a solenoid operated three-way valve having an inlet connected from said inlet conduit, and first and second outlets; an outlet connected from said inlet conduit, and first and second outlets; an outlet conduit, said filter having an inlet and an outlet, a first conduit connected from said three-way valve first outlet to said filter inlet, a second conduit connected from said filter outlet to said outlet conduit; conduit means connected from said three-way valve second outlet to said outlet conduit; and a pulse generator connected to the solenoid, said pulse generator producing output pulses of a constant width and of a constant pulse repetition frequency, said pulses causing said three-way valve to be in a first position over the duration thereof and in a second position at all other times between said pulses, said three-way valve connecting said inlet conduit to said first conduit and to said conduit means when said three-way valve is in one and the other of said first and second positions, respectively, said constituent in said outlet conduit being a fraction of that in said inlet conduit, said fraction being equal to one of two ratios, one of said ratios being that of said pulse width to the period of said pulse generator, the other of said ratios being the reciprocal of said one ratio.

Claim 3

The invention as defined in claim 1, including mixing means connected from said outlet conduit to mix and to intermingle the contents flowing thereinto from said second conduit and said conduit means.

Claim 4

The invention as defined in claim 1, wherein said three-way valve is spring biased to said one position when said solenoid is deenegized, said fraction being said one ratio.

Claim 5

The invention as defined in claim 1, wherein said conduit means includes an adjustable needle valve having an inlet and an outlet, a third conduit connected from said second three-way valve outlet to said needle valve inlet, and a fourth conduit connected from said needle valve outlet to said outlet conduit.

Claim 6

The invention as defined in claim 1, including means to adjust said pulse width and said pulse repetition frequency.

Claim 7

Apparatus for reducing the concentration of a constituent in a fluid, said apparatus comprising: first means to remove at least a portion of the constituent from the fluid, said first means having inlet port means and outlet port means; bypass conduit means; second means to supply the fluid alternately to said inlet port means and to the interior of said bypass conduit means, said outlet port means and the interior of said bypass conduit means being in free and open communication with each other; said second means including an inlet conduit for the fluid, a three-way valve having an inlet connected from said inlet conduit, said three-way valve having first and second outlet ports, first and second conduits connected from said first and second ports, respectively, said first conduit being connected to said inlet port means, said three-way valve being a spring biAsed solenoid valve which prevents inlet fluid from entering said second conduit when deenergized, a pulse generator connected to energize said valve with a substantially rectangular voltage pulse of a constant pulse repetition frequency (PRF) and of a constant pulse width, third means to adjust said PRF, fourth means to adjust said pulse width, a needle valve connected from said second conduit, fifth means to adjust the opening of said needle valve, a third conduit connected from said outlet port means, a fourth conduit connected from said needle valve, an outlet conduit, the interiors of said third, fourth and outlet conduits being in free and open communication with each other, a mixing tank including a hollow cylinder and upper and lower circular end plates fixed thereto in a fluid tight manner, said upper plate having first and second holes therethrough, said first hole being located through the center of said upper plate, said second hole being spaced from said first hole, said outlet conduit extending through said second hole to a position closer to said lower plate than said upper plate, said outlet conduit having a fluid tight seal therearound to prevent fluid from passing out of said tank between it and the edge of said second hole, said outlet conduit having a hole through the wall thereof spaced from the internal surface of said upper plate, a delivery conduit sealed around said first hole to prevent fluid from passing out of said tank between it and the edge of said first hole, an electrolytic titrater having a cell and output circuitry, said cell having a gas inlet and a gas outlet, said delivery conduit being connected to said gas inlet, and a D.C. voltmeter calibrated in the concentration of hydrogen sulfide connected from said output circuitry.

Claim 8

Apparatus for reducing the concentration of a constituent in a fluid, said apparatus comprising: first means to remove at least a portion of the constituent from the fluid, said first means having inlet port means and outlet port means; bypass conduit means; second means to supply the fluid alternately to said inlet port means and to the interior of said bypass conduit means, said outlet port means and the interior of said bypass conduit means being in free and open communication with each other; said second means including an inlet conduit for the fluid, a three-way valve having an inlet connected from said inlet conduit, said three-way valve having first and second outlet ports, first and second conduits connected from said first and second ports, respectively, said first conduit being connected to said inlet port means, said three-way valve being a spring biAsed solenoid valve which prevents inlet fluid from entering said second conduit when deenergized, a pulse generator connected to energize said valve with a substantially rectangular voltage pulse of a constant pulse repetition frequency (PRF) and of a constant pulse width, third means to adjust said PRF, fourth means to adjust said pulse width, a needle valve connected from said second conduit, fifth means to adjust the opening of said needle valve, a third conduit connected from said outlet port means, a fourth conduit connected from said needle valve, an outlet conduit, the interiors of said third, fourth and outlet conduits being in free and open communication with each other, a mixing tank including a hollow cylinder and upper and lower circular end plates fixed thereto in a fluid tight manner, said upper plate having first and second holes therethrough, said first hole being located through the center of said upper plate, said second hole being spaced from said first hole, said outlet conduit extending through said second hole to a position closer to said lower plate than said upper plate, said outlet conduit having a fluid tight seal therearound to prevent fluid from passing out of said tank between it and the edge of said second hole, said outlet conduit having a hole through the wall thereof spaced from the internal surface of said upper plate, a delivery conduit sealed around said first hole to prevent fluid from passing out of said tank between it and the edge of said first hole, an electrolytic titrater having a cell and output circuitry, said cell having a gas inlet and a gas outlet, said delivery conduit being connected to said gas inlet, and a D.C. voltmeter calibrated in the concentration of hydrogen sulfide connected from said output circuitry.

Claim 9

The invention as defined in claim 6, wherein said outlet conduit opening has an angular location to direct the escape of fluid therefrom in a predetermined direction substantially perpendicular to a plane through the axis of said cylinder.

Claim 10

Apparatus for reducing the concentration of a constituent of a fluid by a known fraction thereof, said apparatus comprising: an input conduit to receive the fluid; a filter adapted to remove the constituent from the fluid; a solenoid operated three-way valve having an inlet connected from said inlet conduit, and first and second outlets; an outlet conduit, said filter having an inlet and an outlet, a first conduit connected from said three-way valve first outlet to said filter inlet, a second conduit connected from said filter outlet to said outlet conduit; conduit means connected from said three-way valve second outlet to said outlet conduit; a pulse generator connected to the solenoid, said pulse generator producing output pulses of a constant width and of a constant pulse repetition frequency, said pulses causing said three-way valve to be in a first position over the duration thereof and in a second position at all other times between said pulses, said three-way valve connecting said inlet conduit to said first conduit and to said conduit means when said three-way valve is in one and the other of said first and second positions, respectively, said constituent in said outlet conduit being a fraction of that in said inlet conduit, said fraction being equal to one of two ratios, one of said ratios being that of said pulse width to the period of said pulse generator, the other of said ratios being the reciprocal of said one ratio; mixing means connected from said outlet conduit to mix and to intermingle the contents flowing thereinto from said second conduit and said conduit means; said mixing means including an elongated fluid-tight tank having first and second ends, said outlet conduit sealed through and opening into the interior of said tank nearer said first end thereof than said second end thereof, and an exhaust conduit sealed through said tank second end.

Claim 11

Apparatus for reducing the concentration of a constituent of a fluid by a known fraction thereof, said apparatus comprising: an input conduit to receive the fluid; a filter adapted to remove the constituent from the fluid; a solenoid operated three-way valve having an inlet connected from said inlet conduit, and first and second outlets; an outlet conduit, said filter having an inlet and an outlet, a first conduit connected from said three-way valve first outlet to said filter inlet, a second conduit connected from said filter outlet to said outlet conduit; conduit means connected from said three-way valve second outlet to said outlet conduit; a pulse generator connected to the solenoid, said pulse generator producing output pulses of a constant width and of a constant pulse repetition frequency, said pulses causing said three-way valve to be in a first position over the duration thereof and in a second position at all other times between said pulses, said three-way valve connecting said inlet conduit to said first conduit and to said conduit means when said three-way valve is in one and the other of said first and second positions, respectively, said constituent in said outlet conduit being a fraction of that in said inlet conduit, said fraction being equal to one of two ratios, one of said ratios being that of said pulse width to the period of said pulse generator, the other of said ratios being the reciprocal of said one ratio; mixing means connected from said outlet conduit to mix and to intermingle the contents flowing thereinto from said second conduit and said conduit means; said mixing means including an elongated fluid-tight tank having first and second ends, said outlet conduit sealed through and opening into the interior of said tank nearer said first end thereof than said second end thereof, and an exhaust conduit sealed through said tank second end.

Claim 12

The invention as defined in claim 8, wherein said conduit means includes an adjustable needle valve having an inLet and an outlet, a third conduit connected from said second three-way valve outlet to said needle valve inlet, and a fourth conduit connected from said needle valve outlet to said outlet conduit.

Claim 13

The invention as defined in claim 9, wherein said three-way valve is spring biased to said one position when said solenoid is deenergized, said fraction being said one ratio.