US3456937A - Stove checker - Google Patents

Stove checker Download PDF

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Publication number
US3456937A
US3456937A US651594A US3456937DA US3456937A US 3456937 A US3456937 A US 3456937A US 651594 A US651594 A US 651594A US 3456937D A US3456937D A US 3456937DA US 3456937 A US3456937 A US 3456937A
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US
United States
Prior art keywords
checker
checkers
stove
flue
flues
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US651594A
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English (en)
Inventor
Frank A Berczynski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A E Anderson Construction Corp
Original Assignee
A E Anderson Construction Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by A E Anderson Construction Corp filed Critical A E Anderson Construction Corp
Application granted granted Critical
Publication of US3456937A publication Critical patent/US3456937A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B9/00—Stoves for heating the blast in blast furnaces
    • C21B9/02—Brick hot-blast stoves
    • C21B9/06—Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/04—Casings; Linings; Walls; Roofs characterised by the form, e.g. shape of the bricks or blocks used
    • F27D1/042—Bricks shaped for use in regenerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/009—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator
    • Y10S165/03—Mass formed of modules arranged in three dimensional matrix, i.e. checkerwork

Definitions

  • the capacity in a given system can be increased by decreasing the duration of its cooling period. Shortening of the cooling period, however, also shortens the time available to reheat the stove in most systems, thereby imposing obvious limitations on this method in the absence of a checker of increased effectiveness.
  • the heat capacity of a stove also could be increased by increasing the total checker Weight.
  • One Way of doing this would be to increase the stove height.
  • effective height increases cannot be added to the existing foundation.
  • Stove diameter also is limited. Therefore, this approach usually is not available.
  • Heat capacity also might be increased by increasing the temperature level of the checker column.
  • the refractory and checker column support material limit the maximum operating temperature obtainable with a given installation.
  • the effectiveness of the brick mass can be increased by increasing its temperature swing.
  • Checker heating surface per unit volume is a measure of its ability to absorb heat and to give it up, and the heating surface area of a checker can be increased by using more but smaller flues.
  • a checker having thinner walls can be used, thereby increasing the temperature swing at the center of the wall, between adjacent flues.
  • Another approach is to increase the proportion of the checker mass which is 3,456,937 Patented July 22, 1969 near a flue surface, the temperature swing being greate at the surface than at the center of the wall.
  • One object of my invention is to provide a checker of high thermal efliciency which can replace at least certain conventional checkers without material alteration of existing stove structures.
  • Another object of my invention is to provide a checker characterized both by high thermal efficiency and by structural strength and integrity.
  • a further object of my invention is to provide the foregoing in a checker having a high ratio of heating surface to volume and a ratio of mass to volume in the range which has been found to be most effective.
  • FIG. 1 is a top plan view of a stove checker, constructed in accordance with my invention
  • FIG. 2 is a side elevational view thereof
  • FIG. 3 is a graph showing the efficiency of a checker of this invention as contrasted with the range of efficiencies of those prior art checkers most commonly used in the United States;
  • FIG. 4 is a view in perspective showing checkers of this invention laid up in a checkerwork pattern of my invention; and 1
  • FIG. 5 is a perspective view of the checker of FIG. 1.
  • a stove checker of my invention generally designated 1, c0mprising a rectangular parallelepiped of suitable refractory material.
  • Checker 1 is formed with four central fiues 2 and a pair of open sided fiues 3 at the opposite ends thereof. Flues 2 and 3 extend through the checker 1 in parallel relation, at right angles to the planes of repose of the checker, as defined by its faces 4.
  • curves B and C show the relationship between checker mass and distance thereof from a flue surface, in illustrative prior art checkers, and taken together they define the range of such ratio provided by those prior art checkers most commonly used in the United States.
  • Curve A shows the ratio of total weight to distance from a flue surface provided by the checker of FIG. 1. It will be noted that curve A shows an efliciency substantially outside of and above the range of efficiencies as defined by prior art curves B and C. For example, with the checker 1 of this invention, well over 50%, and in fact approximately 60% of the total checker weight is within 75 of an inch of a flue surface. The most eflicient of the prior art checkers represented in FIG.
  • the checker 1 is designed so that its flues 2 and 3 have substantially the same cross sectional area throughout. In other words, they are of substantially the same diameter, used in its broad sense. Also, they are arranged in parallel rows and columns, there being two flues to each column, making a total of four columns, and four flues in each of the two rows. Adjacent flues in each row and column thereof are spaced apart substantially the same distance, and this distance is substantially less than the flue diameter.
  • the illustrated checker has a flue diameter of 1 inches (the flues being square with rounded corners) while the spacing between adjacent flues in both the rows and the columns thereof is .839 inch. This makes a total length of 7 inches and a width of inches, the length and width together totaling 13 inches and the length exceeding the width by 2 times the flue diameter.
  • checker size is subject to variation, within limits, but the illustrated example is believed to be the most desirable because of its high efliciency and because it can replace certain commonly used existing checkers, without material alteration of the existing stove installation.
  • the checkers 1 are laid up in generally a basket weave pattern. That is, the adjacent checkers in each course are arranged in right angular relation, as shown in FIG. 4. In this way, the side walls 5 of adjacent checkers close the open sided flues 3. At the corners of adjacent checkers, they combine to provide a free flue 6.
  • the checkers are arranged in right angular relation to the checkers immediately adjacent thereto, in the course below. This is indicated in FIG. 4 where the checkers in the superposed course are denoted 1, otherwise being identical with the checkers 1 described above and illustrated in FIG. 1. Also, the checkers in the superposed course are offset one flue, along quadrature axes.
  • checkers must be modified to fit stove periphery, only a very simple modification, for example elimination of one or both sets of end flues, is required.
  • a stove checker comprising a rectangular parallelepiped of refractory material having four central flues and a pair of open-sided flues at opposite ends thereof providing a total of eight substantially equally spaced flues of substantially equal cross sectional area arranged in parallel rows and columns, characterized in that. the spacing between adjacent flues in each row and column thereof is substantially no more than about 63.2% of the flue diameter and at least about half of said material is substantially within 0.3 inch of a flue surface.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Metallurgy (AREA)
  • Manufacturing & Machinery (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Air Supply (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Glass Melting And Manufacturing (AREA)
US651594A 1967-07-06 1967-07-06 Stove checker Expired - Lifetime US3456937A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65159467A 1967-07-06 1967-07-06

Publications (1)

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US3456937A true US3456937A (en) 1969-07-22

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Application Number Title Priority Date Filing Date
US651594A Expired - Lifetime US3456937A (en) 1967-07-06 1967-07-06 Stove checker

Country Status (3)

Country Link
US (1) US3456937A (enrdf_load_stackoverflow)
FR (1) FR1570395A (enrdf_load_stackoverflow)
GB (1) GB1228835A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172655B1 (en) * 1984-08-14 1988-01-07 NATIONAL REFRACTORIES & MINERALS CORPORATION Heat exchange stucture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211624C2 (de) * 1982-03-30 1985-11-21 Didier-Werke Ag, 6200 Wiesbaden Regeneratorgitter mit aufeinanderfolgenden, senkrechte Kanäle bildenden Lagen von Reihen aus rechteckigen Bindersteinen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848242A (en) * 1930-12-26 1932-03-08 Alvin A Claassen Checker work
US2451392A (en) * 1945-08-10 1948-10-12 Nat Tube Co Checkerwork and brick therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1848242A (en) * 1930-12-26 1932-03-08 Alvin A Claassen Checker work
US2451392A (en) * 1945-08-10 1948-10-12 Nat Tube Co Checkerwork and brick therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0172655B1 (en) * 1984-08-14 1988-01-07 NATIONAL REFRACTORIES & MINERALS CORPORATION Heat exchange stucture

Also Published As

Publication number Publication date
GB1228835A (enrdf_load_stackoverflow) 1971-04-21
FR1570395A (enrdf_load_stackoverflow) 1969-06-06

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