US1142838A - Hot-blast stove. - Google Patents

Description

M. A. NEELAND. HOT BLAST STOVE.

r APPLICATION FILED OCT 19, 1912- 1,12 .83

2 SHEETS-SHEET I.

W! I min WITNESSES Patented June 15, 1915.

M. A. NEELAND.

HOT BLAST STOVE.

H APPLICATION FILED OCT-19,1912. 1,142,38 Patented June 15, 1915 2 SHEETS-SHEET 2.

WITNESSES MARVIN A. NEELAND, 0F MONTCLAIR, NEW JERSEY.

HOT-BLAST srovn.

Specification of Letters Patent.

Patented June 15, 1915..

Application filed October 19, 1912. Serial No. 726,766.

To all whom it may concern: Be it known that I, MARVIN A. NEELAND, a citizen of the United States, residing in Montclair, New Jersey, have invented new and useful Improvements in Hot- Blast Stoves, of which the following is a specification.

This invention relates to hot blast stoves such as are used for heating air to be used in blast furnaces, and to other apparatus working on the same regenerative principle. In these apparatus a checker work of brick is provided throu h which burning gases are passed for a su cient time to heat them, after which the gas is cut off and the air to be heated is passed through. The air takes up the heat accumulated in the brick-work and is thereby heated sufliciently for the blast. This operation is repeated at such intervals as are necessary. The bricks heretofore used have had flat or approximately flat faces. In order to secure sufficient strength they have to be made of a sufficient minimum thickness. With this necessary thickness of the bricks there is a considerable volume of brickwork which serves little or no use in alternately absorbing and giving out the heat. That is to say, only a portion of the brick near the exposed faces is necessary for the heating operation. The

volume of the brick-work, therefore, is disproportionate to the surface thereof which is exposed to the burning gas and the air.

This invention remedies the disproportion to a substantial extent by using bricks which are formed with corrugated faces. The corrugations are so arran ed as to increase the extent of exposed sur ace without decreasing the volume below that which is necessary for strength.

The accompanying drawings illustrate embodiments of the lnvention.

Figure 1 is a horizontal section of a hot blast stove of the three-pass type. Fig. 2 is a vertical radial section thereof on the line 22 of Fig. 1. Fig. 3 is a section approximately on the line 33 of Fig. 1. Fig. 4: is a horizontal section of a hot blast stove of the two-pass type.

In the three-pass type of stove illustrated in Fig. 1 the central chamber 'A is the combustion chamber. The gas passes upward to the top of this chamber and thence over to an intermediate chamber B; and from the bottom of this intermediate chambricks form a continuous line, and the radial bricks G are arranged as spacers between the circular lines. In the next course, the rad1al bricks G are longer and form continuous radial lines, while the bricks F of the circular lines are shorter and act as spacers between the radial lines of brick.

In both courses the bricks forming circular lines are made gradually smaller toward the center and 1 are spaced gradually farther away from each other toward the center so as to secure roughly uniform areas in the.

several vertical passages. I

The exposed faces of the circular lines of brick are greater in area than the exposed faces of the radial lines, and I prefer to apply the improvement to these circular lines of brick. I have, therefore, corrugated the exposed faces of the bricks in the circular lines, forming two complete corrugations in each brick and designing and arranging the bricks so that the inward proj ection on each one is in radial line with the inward depression on the opposed face of the next one, and the outward projections and depressions similarly. This results in providing a greater length (circularly) of exposed face in each of the vertical passages, while maintaining the necessary volume of brick-work to support the weights. Or in other words, provides a greater radiating surface. A stove of this design may be made much smaller than the previous standard for securing a given heat effect; orif of the same size as one of the previous design will provide a greater heating effect. The corrugations in the successive horizontal courses are arranged to coincidd with each other asshown in Fig. 3, so as to avoid any obstructlon to the flow of gases or any g3 intense shoulders upon which dirt might accumulate. Both of the two intersecting lines of brick-work may be made corrugated if de sired. This can be very conveniently done in the type of stove shown in Fig. 4. Here there is a side combustion chamber A and a segmental heat-interchanging chamber 18, separated from the first by a solid wall of brick-work D. The two lines of bricks F and F? are straight lines, intersecting each other at right angles. Tn one course the bricks F are longer and abut against each other so as to form continuous lines, the bricks F forming spacers between such lines; and in the nextcourse the long bricks will lie upon the short bricks of the previous course to form continuous lines, and vice versa. The corrugations are similar to those shown in Fig. 1 and similarly arranged to bring. the projections of one brick in line with the depressions in the opposing face of the next brick. I

The bricks of thefdiii'erent series (circular and radial respectively in Fig. 1 or longitudinal and transverse respectivelyin Fig. a have their ends interlocked at the intersections of the two series in the manner described in order to bond them strongly to gether, and the strength of the bond is the greater by reason of the fact that the faces of the corrugated bricks are made fiat where they contact with the ends of the bricks of the intersecting series,only the exposedfaces being corrugated. In Fig. 4 both series of bricks} are made in this way.

Though I have described with great particularity of detail contain specific embodi-- ments of the invention yet it will be understood" that the invention is not limited to the particular embodiments disclosed. Various modifications thereof in detail and in the combination of the parts may be made by those skilled in the art without departure from the invention.

What I claim is:

1. A hot blast stove, the regenerative chamber of which is provided with a brick checker-work with vertical passages for the heating gases and the air, opposite faces of the brick-work forming said passages being correspondingly corrugated, so that a projection on one face is in line with thedepression on the opposite face, for the purpose of providing an extended radiating surface in. proportion to the volume of brickwork.

2. A. hot blast stove the regenerative chamber of which is provided with brick checker-work with vertical passages for the heating gases and the air, said bricks being solid and having corrugated faces. forming said passages the projections on one face of a brick being in line with the recesses on its opposite face so as to provide bricks of approximately uniform thickness from end to end and to provide an extended radiating surface in proportion to the volume of brickwork.

3. A hot blast stove, the regenerative chamber of which is provided with a brick checker-work, the bricks being arranged in horizontal courses with continuous vertical passages therethrough, the bricks in the successive courses having corrugated faces, with the corrugations vertical the corrugations in the successive courses being in line with each other so as to constitute continuous vertical corrugations.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

1 MARVIN A. NEELAND.

Witnesses:

l). ANTHONY UsINA, Leno S'rn'BnNvoLL.

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