RU1791682C - Shaft furnace with cross heat-transfer agent feed - Google Patents

Abstract

Usage: heat treatment of lumpy or granular material, for example limestone, cement clinker, phosphorites. SUMMARY OF THE INVENTION: A shaft consists of detachable parts mounted on frames, with rollers resting on the beams and gas distribution walls made of bars located along the height of the shaft. Beams are installed under the gas distribution walls along the length of the bars. The grooves for installing the gas distribution walls are made to the entire depth of the lining. The frames are made in the form of cassettes into which the bar is inserted. 3 ill.

Description

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The invention relates to designs of shaft furnaces of rectangular cross-section with cross-flow of heat carrier for heat treatment of lump or granular material, for example, limestone, cement clinker, phosphorites, etc.

A known construction of a shaft furnace of rectangular cross-section with cross-flow of coolant, comprising a shaft, gas distribution walls made of bars, cavities and ceilings, a system for supplying and removing coolant, support beams on which frames are mounted with rollers supported on the beams, and the shaft at the end walls are made detachable .

A disadvantage of the furnace is the bulkiness of the metal structure on which almost the entire furnace with lining is mounted, which must be rolled out during repairs.

The closest in technical essence and the achieved result is

a design of a rectangular cross section shaft furnace with a heat carrier containing a split shaft made up of parts mounted on metal frames with rollers supported on beams, gas distribution walls made of boards with ceilings forming cavity for the heat carrier passage in which the furnace connector is made on the border of the grooves for installing the gas distribution walls, and the gas distribution walls and side walls of the shaft are stationary.

The disadvantages of such a shaft furnace are the cumbersome design of the devices for sliding the furnace during the repair of gas distribution walls and the increased repair time.

The aim of the invention is to simplify and expedite repair work.

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Figure 1 shows a shaft furnace, a vertical section; figure 2 is a section aa in figure 1; on Fig.Z is a General view of a shaft furnace disassembled during repair.

The shaft furnace with a cross-flow of coolant contains a shaft 1 of rectangular cross-section with side walls 2 lined with refractory 3 and longitudinal gas distribution walls 4 made along the height of the shaft T from bars 5 with ceilings 6 forming cavities for passage of the coolant. In the side walls 2 of the shaft 1 in the lining 3, grooves 8 are made for fastening the gas distribution walls 4, which are enclosed in cassettes 9 mounted on the bottom of the rollers 10 supported on the beams 11. The grooves 8 in the side walls 2 from the side of the cassettes 9 are recessed lining 3. On top of the shaft 1 is connected to the hopper 11, in the bottom is equipped with a feeder 12. The flues 13 and 14 are respectively designed for supplying and discharging the coolant.

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Cross-flow shaft furnace furnace operates as follows.

Material from the hopper 11 enters the shaft 1, where it is subjected to heat treatment, moving under the action of gravity from top to bottom. The finished product is removed from the furnace using an unloading device 12. The coolant through the gas duct 13 enters the cavity 7 and is filtered through the gaps between the bars 5 of the gas distribution wall 4 through a layer of material and the gas flow moves in a cross flow with it.

During the repair of the furnace, the gas distribution walls 4 enclosed in cassettes 9 along the beams roll back to. direction

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as indicated by arrow 15 from the shaft of the furnace, access to the gas distribution walls is provided from all sides. After replacing the outgassed gas distribution walls, the cassettes 9 are returned to their original position and the furnace is ready for operation.

The installation of beams under the gas distribution walls provides, with a minimum material consumption of the beams, an installation on to pump out the gas distribution walls. The installation of beams along the length (along) of the beams also ensures the compactness of the support beams. Groove making

15 in the side walls of the shaft to the entire depth of the lining allows to reduce the material consumption of the structure while reliably securing the gas distribution walls in the shaft of the furnace.

20 Implementation of gas distribution walls by mobile cassette 3 allows increasing access to the beams when replacing them, significantly reducing the mass of the sliding part of the shaft furnace, and accelerating its repair.

Claims (1)

The invention is a shaft furnace with a cross-flow of coolant containing a shaft of detachable parts mounted on frames with 30 rollers supported on the beams, gas distribution walls made of beams located along the shaft height, installed in the groove of the side walls of the shaft and forming cavities for the passage of heat carrier with overlapping, characterized in that, in order to simplify and speed up repair work, the beams are installed under the gas distribution walls along the length of the bars, grooves are made to the entire depth of the lining, 40 and the frames are made in the form of cassettes into which a bar is inserted.