US2507821A - Triple-action blast furnace gas washer - Google Patents

Description

May R6, 1956 Filed Aug. 4, 1947 I. E. SHEWARD 2,507,821

TRIPLE-ACTION BLAST FURNACE GAS WASHER 5 Sheets-Sheet 1 1 1 l l i I 22 I 23 I I I I flaw 14 26 "iii-:53: z; 1 1'3] \l I J Z9 FBGH INVENTOR,

ISAAC ESHEWARD,

AT TO RN av 5.

May 1%, 1950 a. E. SHEWARD 2,507,821

TRIPLE-ACTION BLAST FURNACE GAS WASHER Filed Aug. 4, 1947 5 Sheets-Sheet 2 INVENTOR, lSAAc ESHEWA ATTORNEYS,

y 9 319% I. E. SHEWARD 2,507,821

TRIPLE-ACTION BLAST FURNACE GAS WASHER Filed Aug. 4, 1947 5 Sheets-Sheet 3 l4 Fm. 4:, l9 2! :8 2

INVENTOR, ISAAC E.5HF WARD.

f ATTORNEY s May B6, 1950 E. SHEWARD TRIPLE-ACTION BLAST FURNACE GAS WASHER 5 Sheets-Sheet 4 Filed Aug. 4, 1947 INVENTQR, i'sAAc E, SHEWAR ATTORNEYSQ May M, 950 1. E. SHEWARD 9 5 TRIPLE-ACTION BLAST FURNACE GAS WASHER Filed Aug. 4, 1947 5 Sheets-Sheet 5 INvENToR lsAAc ESHEWARD.

Patented May 16, 1950 UNITED STATES FLATENT oF-Frce rhii nii-ho'r on BLAST FURNACE GAS WASHER isaac "E. Sheward, Youngstown, Ohio Application ht us't 4, 1947-, ser'iamo. 765,920

4 Clkims. .1 I I This invention relates to a 'tripl a'c tidn blastfurnaoe gas-washer. I I

obiio'tof this invention is the eoh's'truotion of a highly ef ii'c ie rrt gas-washer, which will be free from corrosion 'cau's'efi by flue dust and bhemi'cal reaction Withi-h the washer itself.

. Another object of the invention is the 'constifiction of simpie *an 'd eifioient Washer 'tvhich W111 "re move the vapor, Imis't an'd sludge that has been impossibleto accomplish in the washers heretofore, resu Iti'r g in an unsatisfactory depositin thegas mains. I II With the foregoing and other objects in "View, my invention comprises certain novel eonstructions, combinations, and arrangements of parts as will be hereinafter f ully 'de'soribed, "illustrated in the aco'mpanying drawings, and more partioiflarly pointed out the apiien'ded elaims.

gIfnthe drawings; I I I I Fig. 1 is a view in side eievation of an ap aratus eonstructed in atco'rdan'ce with the present invention, 'while I Fig. 2 is partly a vertidal section and partly an 'eleva'tionof the same. I I

Fig. 3 is 'an "enlarged, fragmentary Vertical seetional new 'of the 'aiipafatus.

Fig. 4 is an enlarged, vertical sectional View of part 'of the apparatus. I

Fig. '5 is a 'top plan View of the apparatus.

Fig. 6 is 'a horizontal seotionaivi'ew taken on line 6-6, Fig. '3,"'and looking in the clinictio'n of the arrows. I I I I II Fig. 7 isa horizontal "'setional 'view taken on 1in e 1-7, Fig. 4, and ldokingih thedirction Of the arrows. I

Fig. '8 is a horizontal "sectionahview 't'aken'on 1ine'8 8, Fig. 4, and looking in the direction of the arrows. I I I I Referring to the drawings, in whi'oh the preferied embodiment of this invention is iihistrailed, l designates thebriifiary Cdsiiig of this washing apbaratus, Whi'eh casing is provided with a'dome 2. 'Withih th'ebasing l isaiiri'mary tile checker work 3, below which is a funnelshape, prifixarywat'r-seal 4. 'The 'water seal 4 is composed of a'niiinber hf piates 'fa'stenedtogether'and communicating s'aid-s'e'al'lis a Waterseal 5, as seen in Fig. '3. Extending Vertically through the cheker work3'and the water-seal 4 are aplurality of tile-lined tub'es'fi. These tubes open at'thetop neardoni e 2. I I

A gas-main 1 is provided with a goose-neck 8 extending into basing l fhett'reen the checker wqrki an hs.w t@ :$a i4-. x sn'd ie qi e easing I and through the dome 2 are apIuraIity of sprayers 9; these sprayers each have a suitable nozzle, and discharge inwardly within c'a's ing l.

The Water-seal '4 and '5 has a discharge Ppipe 18 connected to its lower end, and said dischai ge pipe -H) empties into a discharge pipe Hi; discharge 'pipe I1 is open at its upper end, for the eflicient operation of the apparatus.

Extending into casing .l are second sets :0! Sprayers 12; these sprayers l2 discharge under the water sea1 "4 end upon the secondary checker work I3; "this s'e'cohda ry checker work 1'3 has '2. semi-funnel-sh'ape baffie plat'e ll. The che'dker T3 is morecle'arly SI'iUWil "in Fig. '3.

In the primary checker work 3 and the secondary checker work i3 are linings, against the inner fade of easing "I, and also aroma Tubes "5. These linings bbmpiise a "shell of cement 15, and between shell [-5 and easing I is "a liiiihg of Copper 16; this is also true of the coiist1"-iiction enclosing eadh'of the tubes 6. The eheker Work 3 is supportedupon I-beains n,

Under the secondary ch'eiik'r work -'l" 3 is 2. dryer "f8 which has atom 1 9, and a bafifie 20. said dryer 18 is also in'ovided with "laterally-extending oiitle'ts 21, Fig. 2. I I A baffle 22 is imderb'a'ifie '30 with an apr'on 2 3 thereon. A catchbasih "24 is "below the apron 23. This Catch-basin 24 isprovided With a -se i'ies or substantially V-shape bottom p'o'r'tionsf2'5 that produce four v-sh'a'pe compai tmeiits, 'each' compartment has a drain-tube 26 "oomimiiiicating therewith, and each drain t'ube 26 'ezitends'into the auxiliarywater s'eal 21,"Fig."2. Th'e'auxiliafy Water-seal 21 is provided with *a'disdhaifge-bibe 29, whichpipe 2'9 communicateswith the lower end of the water-seal 21. The outerend of pipe 29 communicates with pipe 30, which is open at its topfal'nd is'simila'r to pipe H. I I

The'gas enters the casing 'I through the gasmain 1 an'd'goose neokfi, said'goos'e rieckb'ein'g flattened out a'ndof'suitable shap -ants juncture with the 'a'si'nghr Washerjso 'thaitthegas strikes the siirface'ofthe water seal'rat 'aiiow'm Ward angle and is spread out ever "the "entire surface of the seal '4', and passes around 'the pipe's 6. The gas then passes upthrough the "checker Work 3, striking the dome 2 is deflected downward through" the four "tiibes 8, which must extendten feetabovethe cheker "3. 'The Home 2 houses the spray system, which consists of many Sprayers '9 withsuitahIe"nozzles arranged so ;as 'to satiirateall checker Work "surfaces.

Th'egas enters 'the washrfat a 'dow'nwerje angle and strikes "the 'sinfaceef the "-water seal and a percentage of the flue-dust is precipitated. The gas rises through the checker 3 and is saturated and cooled by the dome sprays 9 before being deflected by the dome and passing down through the four tubes 6. The water from the sprayers 9 passes through the checker work 3 washing and precipitates from the checker work surfaces. This warm, dirty water drains into the water-seal 4 and is discharged through pipes l and H. About 98 per cent of the flue-dust will be eliminated in this first operation.

The waste water from the blast-furnace cooling-system (not shown) can be used in this first action by use of an ordinary booster pump. From two million, five hundred thousand to three million gallons of water in a 24-hour period is recommended for the first operation just described, depending upon how badly the furnace is dustmg.

In the next step of operation, the flue-dust is carried over in three forms, to wit: Mist, vapor, and slush. As the gas emerges from the tubes 6 into the space between the water-seal 4 and checker work [3, it comes into contact with the water sprays; The cool water condenses the vapor at this point. By having the gas and water both travel in the same course (downward), the break-down of the mist is started. The slush is deposited on the surface of the checker work as it endeavors to pass through. The water flowing through the checker work dissolves this slush into a solution and carries it ofi as such.

The gas and water passes through the checker I3 and strikes the battle-plate M, which deflects the water inward, by reason of its peculiar structure, onto the top of the dryer l8, thence to the baille plates 20 and 22. As the water flows from the lower edges of these plates, it forms a solid sheet of water through which the gas must force its way, losing and breaking down whatever slush, vapor and mist remain in it.

The apron 23 is attached to the lower edge of the bafile 22 for the purpose of directing the water into the catch-basin 24 through the tubes 26, thence into the second water-seal 21, from where it is discharged through discharge pipes 29 and 30. The gas at this point frees itself from the water (all water at this point is in a drop form) and flows toward the outer shell, then downward to the surface of the water-seal 21, from which this is deflected upward into the dryer I8, Fig. 4, through the opening between the catch-basin 24 and the water-seal 21. The gas entering the large mouth of the dryer l3 loses velocity, allowing the remaining water to settle out. The gas rises through the dryer l8 and is discharged through the two six-foot gasmains 2|.

The water flowing over the top and sides of the dryer will cause the dryer to have a condensing action; for this reason the water should be as cool as is possible. One million, five hundred gallons of water per 24-hour period is recommended for this action. Therefore, this washing apparatus in its operation, as has just been described, will remove the vapor, mist and sludge that other washers pass through and deposit in the. gas mains.

It is also recommended that the pump (not shown) for the dome sprays 9 have a capacity of two hundred thousand gallons per hour. Also, it should have an automatic control (situated in the gas main as close to the blast-furnace as is practicable), so that in case of a furnace slip, the water pressure will be increased so as to take care of the abnormal amount of dust coming through 4 the apparatus at this time. This increased water pressure should be maintained for a short time after the slip is over. The pump (not shown) should have a manual pressure control set for the most eficient operation.

The gas at the bottom of the apron 23 goes out to the casin l and down to the bottom of the dryer and passes between the catch-basin 24 and the water-seal 21. The water goes into the catch-basin 24 and is discharged through the four discharge pipes 26 into the water-seal 21 at the bottom.

While I have described the preferred embodiment of my invention and illustrated the same in the accompanying drawings, certain minor changes or alterations may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same, and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claims.

What I claim is:

1. In an apparatus of the class described, the combination of a casing provided with a dome top, a primary water-seal in said casing, a checker work above said water-seal, means discharging gas into said casing between said waterseal and checker work, pipes extending through said checker work and said water-seal, Sprayers connected to said dome top and discharging into said casing, a second checker Work under said water-seal, a dryer provided with outlets under said auxiliary checker work, a catch-basin around said dryer, an auxiliary water-seal under said catch-basin, and means connecting said catchbasin to said auxiliary water-seal.

2. In an apparatus of the class described, the combination of a casing provided with a dome top, sprayers extending through said top, a, primary checker work under said dome top, a fun nel-shape water-seal under said checker work, vertical tile-lined tubes extending through said checker work and water-seal, each tube being open at both ends, a secondary checker work under said water-seal, said secondary checker work provided with a funnel-like baffle-plate, a dryer extending up in said baflle-plate and being positioned within said casing, said dryer including a dome-like top, said dryer provided with laterallyextending pipe-like outlets, said dryer provided with a baffle at said outlets, said dryer provided near its middle with a secondar baflie having a depending apron, said last-mentioned bafiie and apron being spaced from said dryer, a catchbasin formed around the dryer at its lower end, said catch-basin being provided with raised bottom portions producing compartments, each compartment provided with a depending tube, an auxiliar water-seal closing the bottom of said casing and positioned under said catch-basin, said tubes extending into said auxiliary water-seal, and sprayers extending through said casing betweensaid primary checker work and said firstmentioned funnel-shape water-seal.

3. In an apparatus of the kind described, a vertically extending casing having a dome-shaped top, a V-shaped partition in the upper part of said casing, tubular members extending vertically from said partition and terminating adjacent said dome, said tubular members opening through said partition and having open upper ends, checker work surrounding said tubular members and engaging the inner face of said casing, a water seal filling the partition around the lower ends of said tubular members, the water 5 level of said seal being spaced below said checker work, a multiplicity of water jet nozzles carried by said dome and directing water downwardly against the upper surface of said checker work, supply means for flue gas opening into the casing between said checker work and water seal, a secondary checker work spaced below said partition and forming a second. partition in said casing, a second multiplicity of water jet nozzles extending into said casing between the first mentioned partition and the secondary checker work, said last jet nozzles being arranged to direct water onto the upper surface of said secondary checker work, and a mist condenser and water collecting means in the casing and aligned directly below said secondary checker work.

4. In an apparatus of the kind described, a vertically extending casing having a dome-shaped top, a V-shaped partition in the upper part of said casing, tubular members extending vertically from said partition and terminating adjacent said dome, said tubular members opening through said partition and having open upper ends, checker work surrounding said tubular members and engaging the inner face of said casing, a water seal filling the partition around the lower ends of said tubular members, the water level of said seal being spaced below said checker work, a multiplicity of water jet nozzles carried by said dome and directing Water downwardly against the upper surface of said checker work, supply means for flue gas opening into the casing between said checker work and water seal, a secondary checker work spaced below said partition and forming a second partition in said casing, a second multiplicity of water jet nozzles extending into said casing between the first mentioned r i i n and the secondary checker work, said last jet nozzles being arranged to direct water onto the upper surface of said secondary checker work, a drier member having a cylindrical body spaced from the casing wall and having a conical top spaced below said secondary checker work, a frusto-conical bafile below said secondary checker work and directing water from the source onto said top, a series of baflles interposed between the casing wall and drier body and arranged to cause water from the secondary checker work to flow down the outside of said body, an inverted conical bottom closing said casing and the water from the secondary checker work and gas mains extending from the upper part of said drier through the casing wall.

ISAAC E. SHEWARD.

REFERENCES CETED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Re. 21,185 Fulweiler Aug. 29, 1939 809,383 Lowe Jan. 9, 1906 1,155,387 Tschudy Oct. 5, 1915 1,452,253 Nevitt Apr. 17, 1923 1,561,000 Kuehn Nov. 10, 1925 1,806,989 Wille May 26, 1931 1,948,343 Gerhold Feb. 20, 1934 1,980,522 Hawley Nov. 13, 1934 2,004,467 Hawley June 11, 1935 2,007,759 Harmon July 9, 1935 2,387,208 Wood Oct. 16, 1945 FOREIGN PATENTS Number Country Date 28,406 Great Britain Dec. 27, 1904 407,909 Great Britain July 2, 1932 457,787 Great Britain June 30, 1936

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