JP2010236740A - Furnace structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a furnace structure of high economical efficiency with a very simple structure, allowing easy replacing and repairing of only refractory bricks with harsh damage in a short period of time. <P>SOLUTION: The furnace structure 1 is equipped with: an outer steel shell 2; back-lining bricks 3 subjected to back lining in an inner wall of the outer steel shell 2; and inner-lining bricks 4 stacked in inner sides of the back-lining bricks 3. A shelf board composing brick 5 vertically held between back-lining bricks 3a, 3b and extended in a horizontal direction is provided in a vicinity higher than a position equivalent to a slag line SL, and inner-lining bricks 4 positioned higher than the shelf board composing brick 5 of the inner-lining bricks 4 are mounted on an upper part of the shelf board composing brick 5. Hence, since only inner-lining bricks 4 below the slag line with harsh erosion is replaced without replacing the inner-lining bricks 4 of a gaseous phase part with almost no damage mounted on the shelf board composing brick 5, in the furnace structure for an ash melting furnace, a construction period for repair is shortened, recyclability is improved, and high economical efficiency is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a furnace body structure in which a refractory brick layer is constructed inside an outer shell.

  In a furnace structure in which a refractory brick layer is constructed inside the outer shell, it is generally performed to replace the damaged refractory brick and repair it. However, as shown in the smelting line 20 in FIG. 2, the damage is severe. The part is a brick near the slag line SL, and the brick in the gas phase portion disposed above the slag line SL is hardly damaged.

Accordingly, it is not only uneconomical but also inferior in recyclability to break down and reconstruct all the refractory brick layers at every refurbishment, so that only the bricks near the slag line SL are replaced. As such a renovation method, for example, by welding an iron shelf board to the outer shell near the slag line and constructing a gas phase brick on it, only the damaged brick below the shelf board is replaced. A method and the like have been proposed (Japanese Patent Laid-Open No. 2004-269991).
Japanese Patent Application Laid-Open No. 2004-269991

  However, when an iron shelf board is welded at a position close to the surface of the slag line, it is difficult to reconstruct the brick layer due to large thermal deformation.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an economical furnace structure capable of replacing and refurbishing only a refractory brick having a very simple structure and severe damage easily and in a short period of time.

  What solves the said subject is a furnace provided with an outer shell, a plurality of lining bricks lined on the inner wall of the outer lining, and a plurality of lining bricks laminated inside the lining brick A shelf-structured brick that is sandwiched from above and below by the backing brick and extends in the horizontal direction is provided near the position above the position corresponding to the slag line in the body structure, and among the lining bricks, the shelf The lining brick located above the brick for building a plate is a furnace structure characterized by being stacked on the upper part of the brick for building a shelf.

  It is preferable that a plurality of the shelf board building bricks are arranged along the inner peripheral wall of the outer shell and at substantially the same height. It is preferable that the furnace body structure is a furnace having a reducing atmosphere in the furnace, and the shelf-constituting brick is made of SiC or carbon. Preferably, the furnace body structure is a furnace having an oxidizing atmosphere in the furnace, and the shelf board building brick is made of SiC, alumina-chromium, or MgO-C.

According to the invention described in claim 1, by providing the shelf-constituting bricks sandwiched from above and below by the backing bricks and extending in the horizontal direction in the vicinity above the position corresponding to the slag line, it is extremely simple. A shelf board with a structure that is excellent in heat resistance and durability can be configured. In addition, when refurbishing, only the lining brick below the slag line, which is severely eroded, can be disassembled and replaced without replacing the damaging gas-phase lining brick loaded on the shelves. The refurbishment period can be shortened, the recyclability is improved, and the furnace structure is rich in economy.
According to invention of Claim 2 or 3, in addition to the effect of said Claim 1, since the brick for shelf board composition is formed with the material which shows high corrosion resistance with respect to slag, damage to the brick for shelf board composition It is possible to suppress the damage and falling off of the lining bricks of the gas phase part loaded on the upper part.

It is a longitudinal cross-sectional view of one Example of the furnace structure of this invention. It is a longitudinal cross-sectional view for demonstrating the erosion line of a furnace body structure.

  The present invention has realized an economical furnace structure that can easily and quickly replace and repair only refractory bricks that are extremely simple and severely damaged.

The furnace structure of the present invention will be described with reference to one embodiment shown in FIG.
The furnace body structure 1 of this embodiment includes an outer shell 2, a plurality of lining bricks 3 lined on the inner wall of the outer lining 2, and a plurality of lining bricks 4 stacked on the inner side of the lining brick 3. And a shelf board building brick 5 that is sandwiched from above and below by the backing bricks 3a and 3b and extends in the horizontal direction is provided near a position corresponding to the slag line SL. Of the lining bricks 4, the lining bricks 4 positioned above the shelf board building bricks 5 are stacked on top of the shelf board building bricks 5. Hereinafter, each configuration will be described in detail.

  The furnace body structure 1 of this embodiment is an ash melting furnace, a brick layer 6 is constructed at the bottom of the outer shell 2, and a furnace bottom brick 7 is disposed above the brick layer 6. A plurality of lining bricks 3 are arranged on the inner wall of the outer shell 2, and the lining bricks 4 are laminated inside the lining bricks 3. In the vicinity of the lower part of the figure where the lining bricks 4 are stacked, bricks 8a, 8b for constituting the slag outlet are arranged apart from each other in the height direction to form a slag outlet 9, and the slag is disposed outside the furnace structure 1. It is configured to be derivable.

  Near the position corresponding to the slag line SL, there is provided a shelf-constituting brick 5 sandwiched from above and below by the backing bricks 3a and 3b and extending in the horizontal direction. More specifically, the shelf building brick 5 is, in order from the bottom in the outer shell 2, the floor brick layer 6, the furnace bottom brick 7, the backing brick 3, the lining brick 4 or the slag outlet configuration brick. After building 8a and 8b up to the height at which the shelf building bricks 5 are arranged, one end is adjacent to the inner peripheral wall of the outer shell 2 and a plurality of the shelf building bricks 5 are arranged at substantially the same height. By placing the lining brick 3a on the upper part thereof, one end side of the shelf board building brick 5 is pressed and locked from above and below by the lining bricks 3a and 3b. Thus, the furnace body structure of the present invention can form a shelf board that is extremely easy and simple and has excellent heat resistance and durability.

  Then, a gas-phase lining brick 4 is loaded up to the upper end opening 10 on the upper part of the shelf-constituting brick 5 to constitute the furnace body structure 1. Therefore, during renovation, the lining brick 4 in the gas phase portion, which is hardly damaged, is loaded on the shelf board building brick 5 and is supported by the shelf board building brick 5, so that the eroded shelf is not replaced. Since only the lining brick 4 and the slag outlet configuration bricks 8a and 8b below the plate constituting brick 5 can be disassembled and replaced, the repair period can be shortened, the recyclability can be improved, and the economically efficient furnace body It becomes a structure.

  In addition, when the furnace body structure is a furnace in a reducing atmosphere, it is preferable that the material of the shelf board building brick is SiC or carbon, and when the furnace body structure is a furnace in an oxidizing atmosphere, the shelf board structure The brick material is preferably SiC, alumina-chromium, or MgO-C. Thereby, since the brick for shelf board formation is formed with the material which shows corrosion resistance with respect to slag, damage to the brick for shelf board construction can be suppressed, and the lining brick of the gas phase part loaded on those upper parts can be suppressed. Damage and dropout can be further prevented. Further, the furnace body structure 1 of this embodiment is an ash melting furnace, but the furnace body structure of the present invention is not limited to this, and various melting furnaces for constructing a refractory brick layer inside an outer shell. Widely applicable.

DESCRIPTION OF SYMBOLS 1 Furnace structure 2 Outer shell 3 Lining brick 4 Lining brick 5 Brick for shelf board 6 Laying brick layer 7 Brick layer 8 Brick for slag outlet 9 Slag outlet 10 Upper end opening SL Slag line 20 Melting line

Claims (3)

  A furnace structure comprising an outer shell, a plurality of lining bricks lined on the inner wall of the outer lining, and a plurality of lining bricks laminated inside the lining brick, In the vicinity above the position corresponding to the above, there is provided a shelf-building brick that is sandwiched from above and below by the backing brick and extends in the horizontal direction, and is located above the shelf-building brick in the lining brick Furnace structure characterized in that the lining bricks are stacked on top of the shelf building bricks.   The furnace body structure according to claim 1, wherein the furnace body structure is a furnace having a reducing atmosphere in the furnace, and a material of the shelf board building brick is SiC or carbon.   The furnace structure according to claim 1, wherein the furnace body structure is a furnace having an oxidizing atmosphere in the furnace, and a material of the shelf board building brick is SiC, alumina-chromium, or MgO-C.

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