US1976575A - Refractory regenerator brick - Google Patents

Description

Oct. 9, 1934. J, E, MacDoNALD 1,976,575

REFRACTORY REGENERAT OR BRI CK Fi led4 April 24 1933 INVENTOR Patented Oct. 9, 1934 'irao sfrATEs rArEir Fri-veemy Appiieatimiaaril' 24,

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My inventicn is a refractory regenerator brick and is especially suitable for open hearth furnaces, heating furnaces, soaking pits and blast furnace stoves, although it is susceptible of use in various other Ways.

Regenerators commonly referred to as checkers constitute a major portion of most furnaces and their purpose is to absorb heat from the waste gases on Way to the stack, and to give off this absorbed heat, When furnace is reversed and operatinCr in the opposite direction.

The primary consideration is the size of flue openings and heating surface of the brick used to construct the checkers, of Which there are many conditions and as many styles of brick and methcds of laying. It has long been desirable to get a checker With proper flue openings With a maxirnmn of heating surface from the brick used.

Most checkers have some offsets or shelves, 29 Which tencl to accumulate dirt, slag and other deposits from the outgoing Waste gases and products of combustion. This accumulation of deposits prevents the brick from absorbing the desired heat, thus greatly lowering the efficiency of the checkers.

One object of my invention is to provide a checker with a maximum of exposed surface of the brick, With a minimum of material. This is accomplished by the small loss of heating surface, in brick to brick joints.

Another object of my invention is to provide a checker With flues so arranged, to permt air and gases to travel vertically, horizontally and diagonally.

Another object of my invention is to provide a brick With all rounded surfaces, When laid up in Working order. The all rounded surfaces reducing friction of the air and gases passing through the regenerator to a minimum, and leaving no shelves or fiat surfaces to accumulate dirt, siag and other deposits.

Another object of my invention is to provide a generally Simplified and improved checker, my bricks are merely stacked in successive tiers, one against another, forming a checker structure having circular flue openings.

Another object of my invention is to provide stronger checker-Work, as the arms of my bricks, which extend across fiues forming the openings, support no weight from above, as the Weight is carried down through the center of the tiers, thus the arms are not affected by heat under load.

Another object of my invention is to avoid What may be termed crowding or cramping of Athe gases, such as occurs When horizontal flue 1933, Serial No. 667,671 (ol.V asa-51) openings are few or entirely absent. The lateral flue openings in my design permits the expansion of the air and gases Within the checker-Work.

Another object of my invention is to provide a brick forming a checker structure so designed for increasing or decreasing the size of the checker V flue openings, to give regulated control and disstribution of the furnace gases in the checker Chambers. For example; using my checker bricks it is possible to make larger or smaller fiues at designated sections -in the checker-Work. This is acquired by using one size or shape brick in building the structure, and altering only the radius on the arms.

Fig. 1 is a plan view of my regenerator brick.V

Fig. 2 is a side elevation of Fig. 1.

Fig. 3 represents a plan view of my brick With a slight variation in the size of the arms, to show how this brick may be changed to give desired flue openings, without getting away from my original design.

Fig. 4 is a side elevation of Fig. 3.

Fig. 5 represents a section of a side elevation of the regenerator chamber of an open hearth furnace, with my bricks assembled in typical style. Fig. 6 is a view, on an enlargedscale, taken on the line VI-VI of Fig. 5. The numeral 3 represents flue openings or passages through Which the Waste gases travel on Way to the stack. The brick absorbing the heat from these gases for the purpose of heating the incoming cold air, When furnace is reversed and operating in the opposite direction.

The numeral 4 indicates checker support tile, comprising part of the under-structure of the checker-Work, and provides the proper spacing for the laying of the checker bricks.

The numeral 5 represents checker rider-walls, and as the name implies, provides the main under-structure for the checker-Work and room for the accumulation of dirt, slag and other deposits, carried down through the checkers.

The numeral 6 represents the bridgewall, which separates the slag pockets from the checkerwork, for the purpose of preventing slag Vfrom getting into the regenerator chamber.

The numeral 7 represents the regenerator chamber roof.

The numeral 8 indicates the port down-takes, through Which the outgoing gases travel after leaving the furnace body and ports, on its way to the regenerator chambers and finally out to the stack.

lThe numeral 9 indicates the slag pocket, so

Vao

ermost ends of the adjacent projections. oWhen V the bricks are assembled as shown in Figs. 5 and 6, circular passageways are formed thereby Vfor the flow of gases.

The projections at the Sides of the bricks are provided with' knobs 1 and recesses 2 Which can o be interlocked with one another, as shown in Fig. 6, thus facilitating assembly of the brcks, and also rendering them less liable to displacement.

I claim as my inventionz- A checker structure for furnaces, comprising bricks each having six projecting sides Which are of circular form in cross section and are of such gradually-increasing diameter from their outermost surfaces' to their base portions that they Vare Vconcave along lines extending from said outermost surfaces to the said base portions, the

lbases of adjacent projections merging with one another toforrn arcs which extend from the extremity of v'one projection to the extremities of adjacent projections, and the said projecting sides of each brick abutting against the similarly formed sid'es'of adjacent bricks.

JAMES E. MACDONALD.

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