US1197068A

US1197068A - Furnace-port-cooling means.

Info

Publication number: US1197068A
Application number: US5683415A
Authority: US
Inventors: Lawrence S Schmidt
Original assignee: SCHMIDT MCCORMICK Co
Current assignee: SCHMIDT-MCCORMICK Co; SCHMIDT MCCORMICK Co
Priority date: 1915-10-20
Filing date: 1915-10-20
Publication date: 1916-09-05
Anticipated expiration: 1933-09-05

Description

L. S. SCHMIDT.

FURNACE PORT cooume MEANS.

APPLICATION FILED OCT. 20. I915.

Patented Sept. 5; 1916.

2 SHEETS-SHEET I.

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IWVIENTOW WITNESSES L. S. SCHMIDT.

FURNACE PORT COOLING MEANS.

APPLICATION FILED OCT. 20, 19:5.

6 1 9 l 5 U m m m e M P z SHEETS-SHEET 2.

,- INVIIEN'TOW LA'WBENCE S. SCHMIDT, OF PITTSBURGH, PENNSEZTI'ANIA, ASSIGNOR T0 SCHMIDT MCCORMICK COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FUBNACE-PORT-COOLING MEANS.

anemone.

Application filed October 20, 1915.

To all whom it may concern Be it known that T, LAWRENCE S. SCHMIDT, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in F urnace-Port-Cooling Means, of which the following is a specification.

In the operation of regenerative furnaces, practice has demonstrated that the refractory material, of which these furnaces are mainly constructed, first attacked and destroyedloy the products oficombustion from the furnace is the arch or partition separating the air and gas ports, this being particularly true of the inner or nose portion of the arch or partition and that portion thereof immediately in the rear of the nose.

Various cooling means have heretofore been provided for protecting the arch or partition with a View of maintaining the inner end or nose at the proper point relative to the furnace to insure the desired combustion and proper direction of the gas and air, and it is to this end the present invention is directed. My aim is to provide new and improved means of this character and particularly cooling means which, while accomplishing the end sought, will not cause a suflicient lowering of the temperature of the incoming gas and air to affect the efficiency of the furnace. This lowering of the temperature of the gas and air passing through the gas and air ports and just before mixing, due to the presence of the port cooling means now usually employed, should be avoided.

It is also l'iigl'ily important to provide means for preventing the destruction of that portion of the refractory material immediately in the rear of the inner end or nose of the arch separating the gas and air ports as well as the face of the nose.

The cooling means employed for the ports in furnaces of this character should. in addition to protecting the nose of. the port or the arch and the refractory mass located just in the rear tl'icrcof without too much cooling. due to the presence of a considerable body or bodies of cooling liquids. include a construction that would not cause a shutdown of the furnace due to a danmgc to a portion of the. cording nu-ans. hut pcrinit the furnace to be operated for a large numhcr of heats or until it is necessary to I'chuild the furnace structure.

Specification of Letters Patent.

Patented faept. It, iltl llti.

Serial No. 56,83 t.

To these and other ends, my invention consists n the improved constructhm and combination of parts hereinafter fully described. illustrated, and particularly pointed out in the claims. In the accompanying drawings, Figure 1 1s a l1011ZOntftl sectional VlGW of a portion of an open hearth furnace, the section bemg taken on line 1-1 of Fig. 2; Fig. 2, a vertical. sectional VlQW of the same taken on the line 22 of Fig. 1; Fig. 3, a vertical sectional view taken on the lihe of Fi 2; Fig. 4, a scale of one and Fig. 5 of Fig. 4-.

In the furnace structure shown, 10 designates a gas uptake and 10* a gas port, the bottomv of the gas port being indicatedv at 10*.

11 is an air port, and 12 designates the arch or partition dividing the air and gas fines or ports; the inner face or nose of the arch or partition is shown at 1%.

The cooling means heretofore referred to comprises a plurality of port encircling units or elements 1?) and 13 one of which is particularly shown in Fig. lof the draw ings. These el ments have a D-shaped contour with the arch portion thereof at the top of the element, this portion being located in the partition 12, the bottom or straight side being located below the bottom lining of the gas port, and the sides or jamb portions in refractory walls encircling the gas port. Each unit or element is hollow and generally of an angular cross-sectional configuration, the element having a crossscction preferably of greater height than width, as shown particularly in Figs. 1 and 2. Each element is provided with an inlet 14 and an outlet 15, these being preferably arranged to one side of the center of. the element, the inlet being preferably at the hottom while the outlet taps the top of the element. The inlet is adapted to receive a cooling fluid from a suitable supply through a pipe ll. the outlet leading to a suitable point through pipe 15. By this arrangenicnt. the water enters at the cooler portion of the clcnicnt-that portion below the bottom 10 and in the vicinity of an air space i0-and discharges at the point of greatest heat. thus not only insuring a proper circulation. hut I')I'(')(lll(l11g a circulation in which thc heated fluid is immediately discharged, being replaced by the. cooler fluid.

(T v n vertical section on an enlarged of theport-inclosing elements; a sectional View on line 5-5 l ft fl flv llWl ill l Since the element provides a continuous channel in its interior, it will be readily understood that the introduction of the cooling fluid through inlet 14 will cause the fluid to traverse all parts of the element toward the outlet, thus tending to provide a circulation of the entire body of fluid within the element. The element is preferably formed with a cleaning opening 16 connected by a pipe 16 leading therefrom to the edge of the brick-work, this opening being opposite a the inlet as shown in Fig. 4:. The element 13 may be formed of sheet metal, the disclosure of the drawings being in the form i the side walls of adjacent elements orby heretofore been the case.

placing the units in comparatively close proximity to each other, build up a composite metallic structure having a plurality of individual circulating streams and individual elements.

The cross sectional area of these units or elements is comparatively small presenting a minimum heat exposure and requiring a considerably less amount of cooling fluid to effectively cool the desired parts than has The cooling means comprising a series of independent units may be extended longitudinally of the port to suit the different ideas of furnace constructors, but the length of the cooled area to produce the best results should be approximately thirty inches.

The assembled elements are free from inter-engagement, simply having a juxtaposed relation either by being placed in contact or in proximity to each other-any distance therebetween preferably not exceed ing one inchand since each element has its individual supply and off-take, damage to any single element will not affect the remaining units or elements.

One element or unit 13 of the cooling means is preferably located on the plane of I the face'12, as shown more particularly in Fig. 2, without, however, forming the entire face when the parts are assembled. .This particular element 13 is preferably of smaller contour than the remaining elements; these latter are each arranged in the refractory material and unexposed to the products of combustion as they pass from the hearth. This provides an arrangement or construction in which the nose portion of the arch is effectively protected from the action of the hot gases and products of combustion as well as the refractory mass of the arch to the rear of and under the arch portions of the cooling elements 13; this latter portion being subjected to the swirling action of the hot gases is readily destroyed if the gases are allowed to strike directly against this portion. Of course, in addition to the unit 13 the other fluid cooled units aid in protecting this portion of the arch or partition adjacent its nose. If desired, the sides or jamb portions of unit 13 can be placed so that these portions may, when assembled, be exposed to contact with the products of combustion.

As will be readily understood, the particular arrangement of units or elements not only provides for a proper circulation of the cooling fluid and reduced liability of the cooling means being placed out of service through damage thereto, but, in addition, the particular formation and location of the elements are such as to prevent the destruction ofthe nose and that portion of the partition immediately back of the nose, thereby increasing the life of the partition without, however, lowering the temperature of the refractory walls to such a degree as will affect the desired working temperature.

The elements or units of the cooling means are successively arranged in different vertical planes intersecting the gas-port and are each independent with separate means for introducing. thereto and circulating a cooling fluid therein, and a damage to a unit or a destruction of a unit would not necessitate-a shut-down of the furnace for repair.

What I claim is 1. The combination with a regenerative furance having gas and air ports and a partition separating the ports, of cooling means comprising a plurality of port-encircling elements one of which has a portion embedded in the partition, said elements forming independent continuous conduits for a cooling fluid.

2. The combination with a regenerative furnace having gas and air ports and a partition separating the ports, of cooling means comprising a plurality of port-encircling elements on of which has a portion embedded in the partition and one of which is exposed on the face plane of the partition, said elements forming independent continuous conduits for a cooling fluid.

3. The combination with a regenerative furnace having a gas port, of cooling means for said port comprising a plurality of portencircling elements approximately D-shape in contour and forming continuous conduits for a cooling fluid.

4:. The combination with a regenerative furnace having a gas port, of cooling means for said port comprising a plurality of successively arranged juxtaposed port encircling elements forming conduits for a cooling fluid, each element having a continuous circulating channel for the cooling fluid.

5. The combination with a regenerative furnace having a gas port, an air port and a partition separating said ports, of cooling means for said partition comprising a plurality of independent portencircling elements forming continuous conduits for a cooling fluid, one of said elements having a less radius than the other elements and exposed on the face plane of the partition.

6. The combination with a regenerative furnace having a gas port, of cooling means for said port comprising a plurality of in: dependent port-encircling elements each approximately D-shape in contour and having a continuous water-circulation channel, each element having a water inlet and outlet at the bottom and top respectively of the element.

7. The combination with a regenerative furnace having a gas port, an air port and a partition separating said ports, of cooling means for said partition comprising a plurality of elements having parallel sides arranged'in juxtaposition and on successive vertical planes away from the face plane of the partition.

8. The combination with a regenerative furnace having a gas port, an air port and a partition separating said ports, of cooling means for said partition comprising a plurality of elements having parallel sides arranged in juxtaposition and on successive vertical planes away from the face plane of the partition, one of said elements being exposed to products of combustion on the face plane of said partition. v

9. The combination with a regenerative furnace having a gas port, an air port and an arched partition separating said ports, of cooling means for said partition comprising a plurality of elements having parallel sides arranged in juxtaposition and on successive vertical planes away from the face plane of the partition, one of said elements being exposed to products of combustion on the face plane of said partition, the remaining elements being unexposed to the products of combustion.

10. The combination with a regenerative furnace having air and gas ports and an arch between said ports, of cooling means comprising a plurality of independent portencircling elements forming conduits for a cooling fluid, one of said elements having a less radius than the remaining elements and exposed on the nose of the arch and the re maining elements havingportions embedded in the arch.

11. The combination with a regenerative 12. The combinaion with .a regenerativefurnace having a gas port, an air port and an arched partition separating said ports, of cooling means for said arch comprising a port-encircling element having an arch, jamb portions and a cross portion and a continuous conduit for a cooling fluid, said arch portion exposed on the face plane of the partition.

13. As an article of manufacture, a unit adapted for use as a member 'of a cooling structure for furnaces, said unit being approximately D-shape in contour and formed hollow to provide a continuous channel therein, the walls of said unit having inlet and-outlet ports communicating with the channel.

14. As an article of manufacture, a unit adapted for use as a member of a cooling structure for furnaces, said unit being approximately D-shape in contour and formed hollow to provide a continuous channel therein, the walls of said unit having inlet and outlet ports communicating with the channel, said ports being located on the same side of the center of the unit.

15. As an article of manufacture, va unit adapted for use as a member of a cooling structure for furnaces, said unit being approximately D-shape in contour and formed hollow to provide a continuous channel therein, the walls of said unit having inlet and outlet ports communicating with the channel, said unit also having a normally closed cleaning port.

16. As an article of manufacture, a unit adapted for use'as a member of a cooling structure for furnaces, said unit being .approximately D-shape in contour and formed hollow to provide a continuous channel therein, the walls of said unit having inlet and outlet ports communicating with tne channel, said unit also having a normally closed cleaning port axially alined with the inlet port.

In testimony whereof I aflix my signature in presence'of two witnesses.

LAWRENCE S. SCHMIDT.

WVitnesses S. A. MCFARLAND, W. DOOLITTLE.