SU1425415A1 - Lining for walls of furnaces with inner recuperation and shaped brick for lining - Google Patents

Abstract

The invention relates to the heating of thermal plants in the metallurgical and machine-building plants. laziness. The purpose of the invention is to improve the performance of the lining by increasing the building strength and heat transfer area of the gas-permeable layer on the side of the smoke collector. The essence of the invention is to use one type of shaped brick laid on horizontal rows interchanged with the formation of rigidly interconnected gas-permeable and gas-tight layers separated by rows of autonomous vertical prefabricated smoke collectors connected in series. At the same time, the chamfers of four bricks form perforation channels, and the notches cylindrical in the lateral faces of the brick when joined form vertical flue channels. It is advisable to use a combination assembly with three rows of collectors. : Z.P. f-ly, il.

Description

The invention relates to heating devices of metallurgical heat engineering and can be used in heating and thermal furnaces of the metallurgical and engineering industries.

The purpose of the invention is to improve the performance of the lining by increasing the building strength and heat transfer area of the gas-permeable layer on the side of the smoke collector.

FIG. 1 shows the lining, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. 2; in fig. 5 is a cross-section of the FIG. 2; in fig. b - section D - D in FIG. 3; in fig. 7 - brick, general view.

The lining of the furnace with internal recovery consists of a gas-permeable layer 1, formed by duct. 2 perforations, shaped brick 3 and gas-tight layer 4, separated by rows of stand-alone vertical smoke collectors 5. Continuous; single-line connection of stand-alone vertical prefabricated smoke collectors to increase ( heat exchange areas are made in the yodpod and superfluous spaces of standard refractory products. The lining of the furnace with internal heat recovery is performed according to the pattern made in terms of autonomous precast smoke collector.

Brick shaped for masonry of furnaces with G / tre; 1the recovery includes perforation channels and cylindrical outlets. An increase in the height of this chamfer perforation, 6 causes a decrease: 1e of building brick strength, and a decrease, 4- to reduce the degree of perforation, with an increase in the diameter of the grooves, 5 leads to a decrease in the building strength of products, and decrease, 3 heat transfer and reduction in flow area. At the same time, the unsymmetrical displacement of the outlets around the center, on which a third of them are located, disrupts the alignment of autonomous vertical combined collectors of collectors when laying the lining into a dressing. During operation of the furnace, the combustion products are sucked out from the working chamber through the perforation holes 2 and, past a series of sequentially connected vertical prefabricated smoke collectors 5, are removed from the furnace. The uniform heating of the lining is ensured by the oncoming movement of gas flows in adjacent rows located in the same plane parallel to the gas-permeable and gas-tight layers. Such a movement pattern is carried out with alternating connections: side faces of shaped

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refractory brick is equal to the distance between the surface of the working chamber and the first row of autonomous precast smoke collectors. When laying the gas-tight layer, the perforation channels are filled with mortar. At this m, the thickness of the gastight layer is equal to the distance between the last row of autonomous precast smoke collectors and the outer surface of the lining. The advantage of the proposed construction is an unlimited number of rows of assemblies of shaped refractory bricks between the gas-permeable and gas-tight layers. However, based on the design dimensions of the linings used and the hydraulic resistance proportional to the number of rows of collectors, it is advisable to use a combination of assemblies in which the thickness of the lining will not exceed 465 mm with the number of rows of collectors equal to three.

In the furnace lining design, all autonomous precast smoke channels are used to remove combustion products. However, if necessary, some of them, usually the middle row, can be used to preheat the air that goes into combustion.

The effectiveness of the proposed construction is provided by an increase in building strength due to the laying of bricks of shaped lining and surface area of heat exchange of flue gases directly in the lining volume, using successively connected rows of autonomous vertical prefabricated smoke collectors. In addition, the proposed design solution allows to simplify the installation technology of the lining, since the product range is reduced, which reduces the capital costs of repair of the liner.

The economic effect is determined by increasing the life of the lining, reducing the capital cost of repairing the furnace and increasing the efficiency of the furnace by reducing the temperature of flue gases at the exit of the furnace and the heat loss through the brickwork.

Claims (1)

Invention Formula . Lining the walls of furnaces with internal recuperation, containing tightly interconnected gas-permeable and gas-tight layers made of perforated brick and separated by autonomous prefabricated vertical smoke collectors, in order to improve the performance of the lining by increasing building strength and heat exchange area gas permeable layer from the side of the D 51m collector; the laying is organized from three successively repeated , 1425415 34 horizontal rows, in two of the co-walls containing perforation channels, the bricks are joined to form a distinction in that the brick is made transverse perforation between chamfers with chamfers at an angle of 45 ° on one side bricks, every third row is laid with the height of the leg, 4–0.6 high, and all the horizontal rows around the brick and cylindrical grooves are connected in series by auto-mi, two of which are located in the corrosive vertical canals of the halls of the same face brick, and a third - the account of the cylindrical grooves on the bricks. on the center of the opposite face with diameter 2 Brick shaped for lining, 3-0.5 of the brick length. i L 1 .Radocho, oh,. Q camera J (/ Vg L, J, -A FIG. 2 five Fig. / .five