US690795A - Apparatus for cooling and cleansing blast-furnace gases. - Google Patents

Description

No. 690,795. v Patented Jan. 7, I902;

. B. H; THWAITE. 1 I APPAR-ATUS FOR COOLING AND fiLEANSING BLAST FURNACE GASES.

(Appiication filed Sept.' 12, 1901.

(No Model.)

' UNITED STATES PATENT OFFICE.

BENJAMIN H. THWAITE, OF WESTMINSTER, ENGLAND, ASSIGNOR TO THE BLAST FURNACE POWER SYN DIOATE, LIMITED, OF LONDON-AND WVEST- MINSTER, ENGLAND.

APPARATUS-FOR COOLING AND CLEANSING BLAST-FURNACE GASES.

SPECIFICATION forming part of Letters Patent l lo. 690,795, dated January 7, 1902. Application filed September 12, 1901. Serial No. 75,220. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN HOWARTH THWAITE, a citizen of England, residing at 29 Great George street, Westminster, in the countyof London, England, have invented a certain new and useful Apparatus for Cooling and Cleansing Blast-Furnace Gases, (for which I have applied for a patent in Great Britain, dated August 1, 1901, No. 15,595,) to of which the following is a specification.

My invention relates to apparatus for coolin g and cleansing the combustible gases which issue from a blast-furnace, so that they may be rendered available for operating in an in- I 5 ternal-combustion engine, the apparatus being so designed that the heat abstracted from the gases is imparted to air to be employed for hot blast or to support the combustion of producer or other gas burned in stoves for heating the blast.

Figure 1 of the accompanying drawings is a longitudinal section, Fig.2 is a transverse section, and Fig. 3 is a sectional plan'on the line 3 3 of Fig. 1, of apparatus according to my invention.

Over a trough a, containing water and made with an inclined bottom, so that deposited mud can be raked out at either side, is supported a casing 1), made in two compartments 3o separated by a horizontal partition 0. The upper compartment is "also divided into a number of subsidiary compartments separated by vertical partitions d. In the lower compartment there are a number of vertical 3 5 partitions e in line with the upper partitions d; but the first,- third, and other odd partitions e have large passages-through their upper parts, while the second, fourth, and other even partitions e have large passages through 40 their lower parts. Through the horizontal partition 0 are rows of holes in which are fitted in an air-tight manner tubes f, closed at their bottoms, which dipinto the water, there being a row of these tubes between each pair of the partitions 6. Through each of the upper partitions dthere are rows of holes fitted in an air-tight manner with bends g of tubes h, which extend down, one in each of the tubes f, to nearly its bottom, it being itself open at the bottom. At one end of the vessel is an inlet is for blast-furnace gases, and

at the other end there is an outlet 1 for them. There is also an inlet 8 and an outlett for air; 7 At each side of the vessel are formed laterally-projecting recesses Z, in each of which 5 5 are accommodated a pair of pulleys m and weights a, suspended by chains which pass over the pulleys, the other ends of these chains being attached to scrapers 10, which are metal plates so shaped that they embrace the tubes f and bear against the faces of the partitions e. The pulleys m are fixed on shafts q, driven by chains from gear-wheels 1*, which are caused by any suitable motor to make a number of turns in the one direction and a'number in the opposite direction alternately.

The apparatus is operated as follows: Blastfurnace gases entering by the inlet, are caused by the partitions e to pass in a zigzag course through the vessel in contact with the 70 tubes f to the outlet Z; At the same time air blown or drawn by a fan or otherwise is caused to enter by the inlet 8, to pass from the first subsidiary compartment down the tubes h of the first row, to ascend the annular. spaces between the tubes f and g to the next upper compartment, and so on through row after row of the tubes to the outlet 25. The blastfurnace gases are thus cooled and the air is heated. Also the gases deposit on the surface the tubes 9 and of the partitions a much of the dust carried by them. By the alternating up-and-down movements of the scrapers 19,, due to the reciprocations of the shafts q, the matters deposited on the tubes g and the partitions e are scraped 0% their surfaces and drop into the water below, forming a mud, which from time to time can be removed.

Having thus described the nature of this invention and the best means'l know of cargo ryih g the same into practical efiect, I claim- 1. An apparatus for cooling and cleansing blast-furnace gases comprising a vessel placed over a Water-trough and having a suitable inlet and outlet for the gases, partitions in said 5 casing provided with openings for the .passage of the gases therethrough, an upper compartment in the said vessel having a suitable air inlet and outlet and divided into subsidiary compartments, tubes depending from a tube extending in each of the said dependalong the surfaces of the said tubes and paring tubes, having an open bottom and contitions, and means for so moving them, subnected at the top to one of the subsidiary stantially as described.

compartments, substantially as and for the In testimony whereof I have hereunto set 5 purposeset forth. my hand in presence of two subscribing wit- 15 2. In combination in an apparatus for cool- I nesses. ing and cleansing blast-furnace gases, verti- B. H. TIHVAITE. cally-extending tubes and partitions over Witnesses: which the gases are caused to pass, scrapers WALTER E. ROCHE,

10 adapted to be moved alternately up and down HORACE ALLEN.

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