US2494634A - Water-cooled refractory damper - Google Patents

Description

W. E. SCHMIDT WATER-COOLED REFRACTORY DAMPER Jan. 17, 195o 2 Sheets-Sheet 2 Filed Nov. 6. 1946 Patented `Wan. 17,1950

2,494,634 waren-cooper) amacrony Daman William E. Schmidt, Chicago, lll., assigner to Carnegie-Illinois tion of New Jersey Steel Corporation, a corpora- Applieatlon November 6, 1946, Serial No. 708,002

Y Claims. (Cl. 251-51) This invention relates to a water-cooled refractory damper and more particularly to such dempers that are exposed to relatively high temperatures.

Dampers of various kinds have been used, but nonev have proved entirely satisfactory. Many warp and/or are quite expensive. Some are made of metal in whole or in part and the metal is burned by the heat and corroded by the acid fumes in the ilue gases. Others are made of alloy metals, butthese are expensive and also warp. Combined water-cooled refractory damp. ers have proved most satisfactory. but they have some of the metal in the frame exposed to the flame. They are also of rather complicated construction requiring refractory tiles oi' special shape which greatly increases the cost of the damper.

- It is therefore an object of my invention to provide a water-cooled refractory damper in which all of the metal in the -damper exposed to .the

hot gases is water cooled.

Another object is to provide a damper in which the refractory tiles used are of standard shape.

These and other objects will be more apparent after referring to the following specication and attached drawings. in which:

Figure 1 is a plan view of the damper hood frame:

Figure 2 is a sectional view taken on the line II-H of Figure l;

Figure 3 is an elevation partly in section taken on the line III-HI of Figure 2;

Figure 4 is a sectional view taken on the line IV-IV of Figure 3;

Figure 5 is a sectional view taken on the line V-V of Figure 3; and

Figure 6 is an enlarged detail.

Referring more particularly to the drawings, the reference numeral 2 indicates the refractory lining of the iiue t. The top of the flue is provided with an opening 6 extending to the oor t. A damper seat iii extends from the bottom of the ue t up into the opening t and, as shown, is madeof spaced-apart I-beams i2 connected at the bottom by an I-beam ifi and at the top oi the line t by an I-beam i6. The I-beams i2 are anchored to the walls by means of anchor bolts it which pass through slotted holes 2U in the beams.

The frame of the damper is made of two members, the outer member 22 extending along two sides and the bottom of the damper as best shown in Figure 3. This member is made of a U- shaped outer metallic plate 2t welded to an inner plate 28 which is provided with a recess 28. 'Ihese spaced- apart plates 24 and 28 form a U-shaped water chamber 30 with the legs of the U extending inwardly. A wearing plate 2l oi' hard metal is welded to each leg of the member 22.

The inner frame member 32 also has two legs parallel to the sides oi' the damper and a connecting bottom ieg. The side legs of member 32 are made of two spaced-apart plates 34 welded to spaced-apart channel members 88 to form an H- shaped water chamber 38 with the legs of the H extending toward the frame member 22. There are recesses 40 on each side of each leg which are similar to recesses 28. The connecting leg is made in the same manner as frame member 22.

The damper is provided with three rows of refractory tiles 42. The tiles in the outer rows extend between and are received in opposed recesses 28 and 40 as shown in Figures 3 and 4. The tiles in the center row extend between and are received in opposed recesses 40. The bottom tile in each row is received in the bottom recess. A sealing plate 44, which is as wide as the damper is thick and has a reduced portion shaped to extend into the recesses 28 and 48, is loosely placed on top of each row of tiles. A space 48 is provided between the sealing plate 44 and the top of the frame members 22 and 32 to permit expension.

As best shown in Figure 6, a plate 48 is welded to the top of each of the vertical legs of the frame. A pipe 58 is welded to the plate 48 which is provided with an opening 52 to permit ilow of water between the .pipes 50 and water chambers 30 and 38. Resting on the-plates 48 is a clamp E4 consisting of two plates 56 which have-spaced-apart curved portions 58 for receiving pipes 50 and which are clamped together by means of bolts 80. The pipes 5l! pass upwardly through a damper hood 52 which is made of channel irons 64 anchored to the floor 8 by means of bolts 88. The

top of the damper hood 82 is made of two plates G8 and it fastened to the channel 64'by means of bolts l2. The plates G8 and it are provided with holes 'it to permit passage of the pipes 50.

Above each of the holes 14 is a oating seal 'i6 which is of standard construction and as shown consists of two portions 'I8 bolted together. 'I'he seal prevents an excessive amount of air from being drawn into the waste gas ue 4. Above the seals 16 the pipes it are fastened together by means of a second clamp 54 which is provided with a hole 80 in the center thereof. A lifting rod 82 has its bifurcated lower end 84 passing over the clamp 54 to which it is fastened by means 3 of a bolt 86 passing through holes in the rod and hole 80.

A iiexible inlet hose 88 is fastened to the right hand pipe 50 to deliver water thereto. As shown by the arrows in Figure 3, the water passes downwardly through the pipe 59 to the water chamber 30, through the waterl chamber 30 and upwardly through the left hand pipe 50. The tops of the two left hand pipes 50 are connected by means of piping 90 and the water passes downwardly through the pipe second from the left in Figure 3 into the Water chamber 38 and upwardly through the pipe second from the right through an outlet hose 92. This arrangement is such that the cooling water in the damper has a constant velocity through the entire damper frame and keeps the sediment in suspension in the water during the circulation. The velocity of the water may be regulated to suit the cooling requirements of the damper. In case sediment should gather in low parts of the damper, it may be forced out by turnng on full water pressure for a short period of ime.

While one embodiment of my invention has been shown and described, it will be apparent that other adaptations and modiiications may be made without departing from the scope of the following claims.

I claim: i l

1. A water-cooled refractory damper having two sides and two ends, which damper comprises a hollow metallic frame extending along two sides and one end of the damper, said frame having spaced-apart inner and outer walls forming a water chamber, the water chamber along 35 each side of the damper being U-shaped in cross-section with the legs of the U extending inwardly toward the opposite side of the damper and providing a recesslbetween the legs, and refractory tiles received in said recesses and extending from side to side of the damper, each of said refractory tiles having a thickness throughout its length equal to the width of the recess.

2. A water-cooled refractory damper having two sides and two ends, which damper comprises a hollow outer metallic frame member extending along two sides and one end of the damper, said frame member having spacedapart inner and outer walls forming a water chamber, the water chamber along each side of the damper being U-shaped in cross-section with the legs of the U extending inwardly toward the opposite side of the damper and providing a recess between the legs, an inner metallic frame having two hollow legs parallel to the sides of the damper connected adjacent the end of the outer member, said inner frame having spaced-apart walls forming a water chamber, the Water chamber being H-ehaped in crosssection with the legs of the H extending toward the U on each side to provide a recess therebetween, and three rows of refractory tiles, the tiles in each row being received in opposed recesses and extending therebetween.

3. A water-cooled refractory damper having two sides and a bottom, which damper comprises a hollow metallic frame extending along two sides and the bottom of the damper, said frame having spaced-apart inner and outer walls forming a water chamber, the water chamber along each side of the damper being U-shaped in cross-section with the legs of the U extending 5 inwardly toward the opposite side of the damper and providing a recess between the legs, refractory tiles received in said recesses and extending from side to side of the damper, and a sealing plate loosely mounted on top of said tiles,

said plate having a portion thereof extending into said recesses.

4. A water-cooled refractory damper having two sides and a bottom, which damper comprises a. hollow outer metallic frame member extending along two sides and the bottom of the v damper, said frame member having spaced-apart inner and outer walls forming a water chamber, the water chamber along each side of the damper being U-shaped in cross-section with the legs of the U extending inwardly toward the opposite side of the damper and providing a recess between the legs, an inner metallic frame having two hollow legs Parallel to the sides of the damper connected at their lower end, said inner frame having spaced-apart walls forming a water chamber, the water chamber being H-shaped in cross section with the legs of the H extending toward the U on each side to provide a recess therebetween, three rows of refractory tiles, the tiles in each row being received in opposed recesses and extending therebetween, and a sealing plate loosely mounted on top of each row of said tiles, said plate having a portion thereof extending into said recesses.

5. A water-cooled refractory damper having two sides and two ends, which damper comprises a hollow outer metallic frame member extending along two sides and one end of the damper, said frame member having spacedapart inner and outer walls forming a water chamber, the water chamber along each side of the damper being U-shaped in cross-section ,with the legs of the U extending inwardly toward the opposite side of the damper and providing a recess between the legs, an inner metallic frame having a plurality of hollow legs parallel to the sides of the damper, each of the legs of said inner frame having spaced-apart walls forming a water chamber. the water chamber being H-shaped in cross-section with the legs of the H extending toward the U on each side to form a recess therebetween, and a plurality of rows of refractory tiles, the tiles in each row being received in opposed recesses' and extendlng therebetween.

WILLIAM E. SCHMIDI.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date o5 387,419 Jordan Aug. '1, 1888 1,649,749 Shook Nov. 15, 1927 1,690,606 Williams Nov. 6, 1928 1,824,434 Hushour Sept. 22, 1931 1,905,638 Hushour Apr. 25, 1933 1,956,959 McDonnell May 1, 1934

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