US1857561A - Furnace wall structure - Google Patents

Description

May l0, 1932. E. LUNDGREN FURNACE WALL STRUCTURE Filed DeC. l2, 1928 2 Sheets-Sheet Z4/ym INVENTOR.

L W/ww. J

A TTORNEYS.

May 10, 1932. E. LUNDGREN FURNACE WALL STRUCTURE Filed Dec. 12, 1928 '2 Sheets-Sheet 2 IIIIIIII N V EN TOR. M444,

A TTORNEY;

, Patented May 10, 1932 UNITED STATES vPATENT OFFICE j EDWIN IIJUNDGBEN, F FREDERICK, MARYLAND, ASSIGNOB T0 INTERNATIONAL 00H- y BUSTION ENGINEERING CORPQRA'IION, V0I' NEW YORK, N. Y., A. OOEPORATION 0l DELAWARE rUnNAcn WALL s'rnUc'rUnE Application med December 12, 1928. Serial No. 325,553.

Multiple retort underfeed stokers are commonly provided with relatively deep ash pockets having clinker grinders at the bottoms thereof for eecting the gradual discharge of ashes. In stokers of this type, the hot ashes entering the dee ash pocket and the burnin of unconsume particles of fuel therein, su ject the front wall of the ash pocket to an intense heat, and ithas been found that the front wall structures at present in general commercial use, are not only incapable of effectively withstanding such intense heat but, also, in case portions thereof are burned out or otherwise injured it is diicultto repair or replace them.

One of the objects of the present invention is to provide a front wall structure for the ash ocket of a stoker of the type above indicateg in which said disadvantages of the prior constructions are overcome.

Another objectof the invention is to provide a furnace wall structure in which the component parts thereof, while permitted to ex and and contract freel and are securely he d in place, may be easi y removed for replacement or repair. Still another object of the invention is to provide novel and improved means for detachably securing the com onent parts of a furnace wall structure in p ace.

These and other objects of the invention and features whereby they may be attained, will be clealy understood from the following description and accompanying drawings, in which:

Fig. 1; and

ig. 4 is a detail sectional plan view taken substantially on the line 4-4 of Fi 3. y

The multiple retort underfeed sto er illustrated in the drawings, isprovided with a retort secon 2, a relatively deep ash ocket 4 at the rear thereof, and clinker grin ers 6 at the bottom of the ash pocket. The ash pocket is provided with a front wall 8, side walls 10 and a rear wall 12, ,the rear well being lined with boiler tubes 14. A supporting wall 16 for the rear ends of the retorts is made up ofv I-beams and is spaced a distance 'in front of the front wall 8 of the ash pocket. This wall 16 is provided with an o ening v18 throu h which air may' pass from t e wind box to t e s ace between saidv wall and the front wall of t e ash pocket, the supply of air to this space being controlled separately from the supply of air to the retort sect-ion by means includlng a damper 20.

In accordance with my invention, the front wall 8 of the ash pocket is made up of bricks or blocks 22 of suitable refractory material that are arranged in superposed horizontal rows with the blocks of adjacent rows arranged in staggered relation. The several blocks which make up the front wall `are supported on a flanged seat or shelf 24 se` cured on a horizonta I-beam 26. The space between the to of this wall structure andthe rear ends of t e retorts is closed by bars or l of the bars or keys 28 being such as to permit them to raise an lower during the expansion and contraction of the front wall. The blocks at the upper portion of the front wall are provided with perforations 32 for di' recting air into the ash pocket to assist in the combustion of any unconsumed fuel therein, the ther blocks being preferably unperforate f The adjacent sides of adjacent blocks are provided with tongue and groove connections 36 .to assist in maintaining the blocks in proper relation.

Each block has a body portion having Hat rear, to and bottom sides or faces. The front si e of the block vis recessed to provide a centrally located vertical web or rib 38. This rib 38 on each block is provided with anv angle iron bracket 48 secured to the supporting wall 16, there being a bracket opposite each row of blocks and extending between the side walls of the furnace.

T\o secure each block in place by means of its anchoring rod 42, the rod is turned upwardly, as shown in dotted lines in Fig. 3 so as to place the end leg 46 in upright position, whereupon the U-shaped bent end of the rod is passed through the vertical slot 40 in the block and then the rod is swung downwardly and its bent outer end is inserted in the aperture in the associated angle iron 48. When an anchoring rod is thus attached, the leg 46 of the rod prevents disengagement of the rod from the block. Each anchoring rod 42 securely holds its block from appreciable fore and aft movement, but the block is free to move vertically and laterally to allow for expansion and contraction of the wall. When it is desired to remove a block for replacement or repair, the outer or iorward end of the anchoring rod 42 is disengaged from its bracket 48 and the rod swung upwardly so as to permit it to be removed from the block.

It will be apparent that in my improved wall structure as above described, the several blocks are securely held, and may be easily removed and replaced; and the structure as a whole may freely expand and contract, and is capable of effectively withstanding the intense heat to which it may be subjected when employed as the front wall of the ash pocket of a stocker of the type above indicated.

As will be evident to those skilled in the art, my invention permits various modifications without departing from the spirit thereof or the scope of the appended claims.

What'rIj claim is:

1. In a multiple retort underfeed furnace having a relatively deep ash pocket with a clinker grinder arranged at the bottom thereof, the improvement which consists in the front wall of the ash pocket being made up of blocks of refractory material arranged in superposed rows with the blocks of adjacent rows arranged in staggered relation, a metal wall structure spaced a distance in front of said front wall, and connections between said structure and said front wall for holding each block from fore and aft movement but permitting vertical and lateral movements thereof to allow for expansion and Contraction of said wall.

2. A furnace wall structure made of blocks of refractor material, and a device detachably secure at a point remote from each block for detachably securing the block in place in such a manner as to permit expansion and contraction of said structure, each of said devices incapable of being detached from the associated block without first detaching it from said support.

3. A furnace wall structure comprising blocks of refractory material, and means for holding each block from movement transversely of the structure but permitting ver tical and lateral movements thereof to allow for expansion and contraction of said structure, comprising a supportspaced a distance from one side of the blocks, and a member having its ends respectively detachably secured to said support and each block, each of said members being incapable of being de tached from its block without first detaching it from said support:

4. A furnace wall structure comprising blocks of refractory material, and means for holding each block from movement transversely of the structure but permitting vertical and lateral movements thereof to allow for expansion and contraction of said struchaving one end detachably secured to said support and its other end in detachable interlocking engagement with said block whereby upon disengaging said member from said support the member may be moved to disen ge its end fromthe block, each of said mem rs being incapable of being detached from its block without first detaching it from said support.

5. A furnace wall structure comprising blocks, each block having a projecting centrally located vertical rib having an elongated vertical slot extending transversely therethrough, a support -spaced a distance from one side of the blocks, and means for holding each block from movement toward and from said support but permittin lateral and vertical movements thereof to a low for expansion and contraction, comprising a rod having a U-shaped bend in one end with the end leo` thereof bent at an angle to the body of sait rod and adapted to be passed through said slot, so that when the rod is swung down into substantially horizontal rposition said bent end is caused to interlock with said rib, the other end of said rod being adapted to be detachably secured to said support.

6. In a multiple retort under eed stoker having a relatively dee ash pocket with a clinker grinder arrange at the bottom thereof, the improvement which consists in the front wall of the ash pocket being made up of blocks of refractory material arran ed in superposed rows with the blocks of adjacent rows arranged in staggered relation, a metal said front wall, a shelf member on which said blocks rest, and fuel supporting ke s having their rear portions restingl upon t e top row of blocks and capable of vertical movement to allow for vertical expansion and contraction-of the blocks. l

In testimony whereof, I have signed my name to this specification this 7th day of December, 1928.

EDWIN LUNDGREN.

Images