US1388813A - Means for washing gas - Google Patents

Description

W. H. GEESMAN.

MEANS FOR WASHING GAS. APP LICATION FILED MAY 28. 1919.

Patented Aug. 23, 1921.

2 SHEETS-SHEET l- Arron/vim;

W. H. GEESMAN.

MEANS FOR WASHING GAS. APPLICATIQN FILED MAY 28. 1919.

Patented Aug". 23, 1921.

2 SHEETSSHEET 2.

Awavrom ,4 rromvzrs WILBUR H. GEESMAN, OF YDUNGSTOWN,

EUNDREDTHS TO ARTHUR, G.

Eur car es.

OHIO, ASSIGNOR OF FORTY-EIGHT ONE- MCKEE & COMPANY, OF CLEVELAND, OHIO, A.

CORPOR ATION OF DELAWARE, TWENTY-SIX ONE-HUNDREDTHS TO ,1. E.

KLIN'G', WEEIIEIN, OF CLEVELAND, OHIO.

OI YOUNGSTOWN, OHIO, AND TWENTY-SIX ONE-HUNDREDTHS T0 L. B.

ms non WASHING ens.

To all whom it'may concern:

Be it known that I, WILBUR H. GEESMAN, a citizen of'the United States, resident of Youngstown, county of ahoning, and State of Ohio, have invented new and useful Improvements in Means for Washing- Gas, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that princiso as to distinguish it from other inventions.

My invention relates to means for washing gas, and particularly to gas washers utilized in connection with blast furnace operation. This invention is designed as an improvement upon the invention shown, described and claimed in m pendin application for U. S. Letters latent erial No. 199,477. The improvement consists, primarily, in applying my design of umbrella baflie-furnishing an unbroken ring of water which is. carried by the gas pressure into and through breaking means, such as a suitable screen, and my design for furnishing fresh water without repumping, both of which designs are shown, described and claimed in said pending application so as to produce an improved design or' reconstruction of a well-known gas washer of the impact type known as the Mullen gas washer, illustrated, for instance, in U. S. Letters Patents No. 782,041, No. 805,929, and No. 890,996. I

My improvement consists in converting in a practicable manner this well-known type of impact washer into a spray type washer, utilizin in the reconstructed type such features of my pending application, Serial N 0. 199,477, as are mentioned above. The difiiculties heretofore encountered in practicably converting this impact type of washer into a spray type were due to the large diameter, small height, and unfortunately situated gas connections of said impact washer. However, this impact type can be readily and practicably converted to the type shown, described and claimed in this application, by reason of the fact that :I have economically increased the height a moderate amount and have extended the central gas inlet so that the same projects through my umbrella Specification of Letters Patent. Application and ma 28, 1919. Serial No.

Patented Aug. 23, 1921.

bafie and delivers gas thereunder, the much more thorough cooling and washing performed in the water cascade making it possible to get excellent results with such a modified type, all with a comparatively small height of'tower, thirty feet, for instance, instead of the forty-five or more feet of the standard spray type of washer. I have also utilized the large diameter to excellent advantage, since it produces a much lower gas velocity and a decreased tendency of the gas to channel up one side of the tank.

The annexed drawings and the following description set forth'in detail certain means embodying my invention, the disclosed means, however, constituting but one of the various mechanical forms in which the princi le of the invention may be applied.

11 said annexed drawings:

Fi ure 1 represents a central vertical longitu inal section of the preferred form of my new and improved gas washer;

Fig. 2 represents a plan view of the simplest form thereof; and

Fig. 3 represents a central vertical longitudinal section of a fragmentary portion of I said simplest form.

eferring to the annexed drawings, a suitable shell 1 is provided, the same being formed by a reasonable extension to the shell of the impact type of washer mentioned. The vertically arranged gas conduit 2 connected at the top to the conduit 3, which conducts the gas from the blast furnace, is extended down through one of the umbrella baflles 9 mentioned in my said pending application Serial No. 199,477. A gas outlet to the usual boilers or stoves is indicated by the ordinal 4, said outlet being positioned as desired but herein shown as provided at the top of the shell 1. '5 furnishing spray water from any suitable supply main are provided, said water dripping down throughbaflies or slats 6. As is also true of my said pending application, additional fresh water in quantity is furnished adjacently the bottom of the tower through suitable pipes 8. This additional large quantity of water is furnished near the bottom of the tower for the purpose of obviating the necessity of pumping the same to the top of the tower. F or the pur- Nozzles pose of subjecting the gas to an effective preliminary washing, by the means and in the manner hereinafter fully described, this water serves as well as would comparatively large amounts of water introduced at different levels into the tower or introduced near the top thereof. Inasmuch as my new and improved washer is utilized particularly in connection with blast furnace operation, I obtain the largequantity of lower water by using blast furnace bosh water which is available at this level. However, I do not claim a blast furnace as part of my new and improved combination, and the large quantity of lower water, to be utilized for an effective preliminary cleaning, by the means and in the manner described, may be obtained from any suitable source and furnished in any suitable manner, without the necessity of pumping the same to a considerable part or the entire height of the tower. The water is maintained at a suitable height, indicated in the drawings, by means of a drain pipe 7 and its connections, said pipe being open at the top, as shown. Any suitable means may be provided for drawing off periodically the dirt and sludge at the point 7. The umbrella or bafiie 9 is provided with a lip 10 forming a trough in which the water collects and over whichit falls to form an unbroken sheet or cascade. As is also true of said pending application, this cascading water falls forwardly, in so far as the direction of travel of the gas is concerned, of suitable water-breaking means, the same being preferably formed of a coarse mesh wire, for instance, of one inch (1") mesh No. 10 wire, indicated by the screen 11. This screen is suitably supported by angles, as shown, and in Fig. 1 suitable transverse angles are projected from said first named angles to support the screen 11. In Figs. 1 and 3 a second umbrella 9 is supported from the conduit 2 by suitable bars 9 Referring to Fig. 3, in which is shown the simplest form of the impact gas washer, as reconstructed into my improved spray type, it will be noted that the incoming gas through the conduit 2 is diverted by the water reservoir at the bottom of said conduit transversely of the shell axis and through the cascading water 12. This water is carried by the gas pressure into and through the screen 11, the cascade assuming a conical shape by reason of the gas pressure. The screen 11 breaks up the water, producing an intimate intermix of the water and gas, resulting in the removal from the gas of the impurities. These impurities are continuously washed from the screen 11 by the water. The gas then travels upwardly through the shell 1 and is discharged from the top thereof.

The construction shown in Fig. 1, includes a plurality of said cascades 12 and waterbreaking means 11, two, in the form of device shown. This construction is advisable where water is scarce and difiicult to obtain of the proper degree of coolness. In this construction the lower water is introduced above the upper bafiie cone or umbrella 9. This upper umbrella is suitably supported from the shell 1, as shown, a trough being formed therein by the lip 10 over which the water falls in an unbroken sheet 12, a screen 11', similar to the screen 11, being provided a spaced distance from said cascading water and supported by transverse extensions of the longitudinal angles supporting the screen 11, said screen 11 being disposed interiorly of said cascading water, inasmuch as, with reference to the direction of travel of the gas, the cascading water is always positioned forwardly of the corresponding screen. A detailed construction for supporting the screens is fully shown, described and claimed in said pending application, Serial No. 199,477. The upper cascade falls upon the umbrella 9 and collects in the trough formed by the lip 10, over which it falls to form a cascade forwardly of the screen 11, as plainly shown. The gas is then finally washed and cooled by the spray water adhering to and dripping from the saturated slats 6.

I have found that the improved construction hereinbefore described and hereinafter claimed, and shown in the accompanying drawings, enables me to procure by the useof my cascading water and screen alone, a degree of coolness and purity in the gas equal tov the results usually obtained by the full washing in previous spray type washers. From this point, by means of my additional cooling and washing through the sprays 5 and slats 6, the gas is delivered at the lowest temperature obtainable from the water available and with the use of the minimum possible amount of such of the fresh cold water as must be pumped. Referring particularly to the construction shown in Fig. 1, the gas is first cooled from an initial temperature of from 450 to 500 degrees Fahrenheit, to about 10 degrees above the temperature of the water in the cascade 12, or, as found in practice, to about 120 degrees Fahrenheit. In passing the second cascade 12, the gas is cooled down to about 100 degrees Fahrenheit or to slightly above the temperature of the bosh water when it enters the washer from the pipes 8. The cooling thereafter by means of the sprays 5 and slats 6 has been indicated.

As a result of introducing the gas centrally of the shell and in an axial direction, I have found that I overcome any tendency of the gas to channel up one side of the shell. This tendency is particularly apparent when the gas is introduced into the washer from one side whence it rushes across the tank to the other side and passes up throu h the tank in an eccentric manner, so that t e gas is not equally distributed over the entire area of the washer. From my centrally arranged, longitudinally disposed gas inlet, as described and claimed in this specification, I divert the gas in a horizontal direction through one or more cascades, whence it passes upwardly in a uinformly distributed current filling the entire washer and through the spray water.

As will be apparent from the accompanying drawings and the above description, my improved gas washer comprises a shell through which the gas is passed centrally from top to bottom, then is diverted radially through breaking means, such as a screen, a ring of cascading water being provided forwardly of the screen, which water is carried by the gas pressure to said screen where it is broken and intimately intermixed with the gas, the latter being prevented from renewing immediately its axial direction of travel, when issuing from the central conduit, and caused to pass through the eascade and the screen by a suitable baffling device. The reservoir of water in the washer below the conduit 2 combined with the baffling device causes the gas to mushroom as it issues from the conduit 2 and pass radially through the cascade and screen. If desired, the cascades, screens and suitable bafliing devices may be multiplied and the gas subjected to repeated washings by being caused to pass successively through said cascades and screens, as shown in Fig. 1.

What I claim is:

1. In a gas washer, the combination of a shell; a gas entrance thereto and agas exit therefrom; means forming a gas conduit connecting said entrance and exit; means maintaining a water level in said shell in an area thereof removed from said entrance and contiguously to said gas conduit; means forming a substantially right angle turn in said conduit adjacently said water level; waterbreaking means intersecting said right-angular direction of gas travel; and means )roviding a sheet of water falling forwar 1y of said breaking means.

2. In a gas washer, the combination of a shell; a gas entrance thereto and a gas exit therefrom; means forming a gas conduit connecting said entrance and exit; means maintaining a water level in said shell in an area thereof removed from said entrance and contiguously to said gas conduit; means forming a substantially right angle turn in said conduit adjacently said water level;

.waterbreaking means lntersecting said right angular direction of gas travel; means providing a sheet of water falling forwardly of said breaking means; and a series of slats and spray water therefor; the gas being permitted to pass through said slats and spray water after its passage through said breaking means.

3. In a gas washer, the combination of a shell; means for passing gas therethrough from top to bottom; means, including a water reservoir and a bafile, for diverting the gas radially and causing the same to mushroom; a screen disposed in the path of travel of said mushrooming gas; and means forming a ring of water falling forwardly of said screen.

4. In a gas washer, the combination of a shell; means for passing gas therethrough from top to bottom; means, including a water reservoir and a baflie, for divert-ing the gas radially and causing the same to mushroom; a screen disposed in the path of travel of said mushrooming gas; a series of sprays and slats disposed above. said screen; and means catching a portion of said spray water and causing the same to fall in a cascade forwardly of said screen.

5. In a gas washer, the combination of a shell; means for passing gas therethrough from top to bottom; means for diverting the gas'radlally and causing the same to mushroom, said means including a water reservoir and an umbrella bafile; a screen (lisposed in the path of travel of said mushrooming gas; a series of sprays and slats disposed above said baflie; and means furnishing additional water above said baflie, and below said slats, the bafile being arranged to catch said spray and additional water and cause the same to fall in a cascade forwardly of said screen.

Signed by me, this 1st day of May, 1919.

WILBUR H. GEESMAN.

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