CN2445272Y - Cupola furnace air internal cooling device - Google Patents

Abstract

The utility model discloses a cupola furnace air internal cooling device, comprising a furnace casing and an inner lining refractory brick furnace wall. The lower site of the melting zone of the furnace casing is respectively provided with a snail air box, a cone-tower-shaped air box, an air venting box, and an air venting tail pipe, wherein, a cavity is formed between the refractory brick wall and the furnace casing. Triangular hollow pipes are distributed along the inner cavity. A plurality of air intake holes and air discharge holes are arranged on each hollow pipe corresponding to the furnace casing, and are respectively conducted on the snail air box, the cone-tower-shaped air box, the air venting box, and the air venting tail pipe. The utility model has the advantages of large heating area and rapid heat conducting speed, and improves the stream temperature shooting in the cupola furnace and each item of the melting index.

Description

Cooling device in the furnace cupola air

The utility model relates to a kind of cooling device of metallurgical smelting unit, is a kind of interior cooling device of air that is used for furnace cupola specifically.

At present, in metallurgical fusion process, the cooling of furnace cupola also is an important step of the every melting index of influence.The known disclosed patent No. is the technology of 98251053.5 " furnace cupola air-cooling apparatuses " in this technical field, it mainly is to utilize welding volute bellows on the furnace shell, and the conic tower type bellows that set gradually, the case and the tail pipe that leaks informaton leak informaton, and radially with in the conic tower type bellows weld some spirals and vertical fin at its furnace shell outer wall, refractory brick furnace wall and furnace shell are coincide constitute outer cooling version.So in use, in its cooling procedure, the air-flow directly direct area of dissipation of contact can only be the long-pending occupied area of fin that deducts of outer cylinder surface of furnace shell, and is promptly long-pending less than the outer cylinder surface of furnace shell, so radiating effect is not very good.

The purpose of this utility model provides that a kind of heat conduction velocity is fast, heating surface area is big, area of dissipation is big, good with the air-flow heat exchange effect, reduce cooling device in the fast furnace cupola air of furnace wall temperature.

For achieving the above object, technical solution of the present utility model is finished by following measure: cooling device in a kind of furnace cupola air, comprise furnace shell and furnace shell inner lining refractory block furnace wall, be separately installed with the volute bellows at the following position of the fusion zone of furnace shell, the conic tower type bellows, the case and the tail pipe that leaks informaton leak informaton, conic tower type bellows bottom also is provided with tuyere tube and feeds in the stove, be distributed with the triangle hollow pipe in the cavity between refractory brick and furnace shell, and have on the pairing furnace shell of each triangle hollow pipe somely to advance, steam vent, difference conducting volute bellows, the conic tower type bellows, the leak informaton case and the tail pipe that leaks informaton are formed cooling device in the air jointly.

Another program of present technique is that the angular range of triangle hollow pipe should be 10 °-45 °.

The characteristics that the utility model compared with prior art has are: the re-entrant portion that forms between refractory brick furnace wall and furnace shell is provided with thin triangle hollow pipe, improved heat-conducting effect, simultaneously, heating surface area and area of dissipation have also been increased, directly the heating surface area of contact furnace endogenous pyrogen and the area of dissipation that air-flow directly contacts have all improved about 2.8-3.6 doubly than former furnace cupola air-cooling apparatus; Calculate by practice and heat balance theory, can make air-flow improve temperature by methods for cooling in the air and reach 150-200 ℃, have that heat conduction velocity is fast, heating surface area is big, area of dissipation is big, good with the air-flow heat exchange effect, can more effectively reduce the temperature of furnace wall, reduce the furnace wall and ablate, prolong furnace life, improve the temperature of injecting gas stream in the stove, save coke, improve every important melting indexs such as molten iron temperature.

Be further described below in conjunction with this novel accompanying drawing embodiment.

Fig. 1 is a cooling device structural profile view in the furnace cupola air.

Fig. 2 is Fig. 1 triangle hollow pipe distribution expanded view.

Fig. 3 is Fig. 1 volute bellows profiles.

By cooling device in the furnace cupola air shown in Figure 1, it has cylindrical metal furnace shell 9, be lined with refractory brick furnace wall 10 in it, make its two body form cavity between radially, and along being distributed with triangle hollow pipe 3 in the cavity, the outer wall of furnace shell 9 that is positioned at the following position of fusion zone of furnace cupola is installed the welding volute bellows 1 conic tower type bellows 5 and the case 7 that leaks informaton respectively, end at its case 7 that leaks informaton is connected with the tail pipe 11 that leaks informaton, the bottom of its conic tower type bellows 5 is provided with plurality of air pipe 6 and feeds in the stove, its preheated gas flow is injected in the stove by tuyere tube 6, be used to improve furnace temperature, and correspond respectively to volute bellows 1 by each triangle hollow pipe 3, conic tower type bellows 5, leak informaton and be respectively equipped with air admission hole 2 on the furnace shell 9 in the case 7, steam vent 4 and 8, wherein steam vent 4 and tuyere tube 6 conductings, leak informaton steam vent 8 on the case 7 with leaking informaton tail pipe 11 conductings, the air-flow of not injecting in the stove is discharged by the tail pipe 11 that leaks informaton,, guarantee to reduce the scaling loss of refractory brick furnace wall 10 to improve degree of supercooling to refractory brick furnace wall 10.

See that Fig. 2 is the version of triangle hollow pipe K to the expansion that distributes, triangle hollow pipe 3 its distribution forms are that the short hollow pipe 3 of each group is positioned at end on the tuyere tube 6, and between each group weak point hollow pipe group leader's hollow pipe 3 are installed, and so rule is arranged.Have air admission hole 2 and steam vent 4 and 8 on the furnace shell 9 of each triangle hollow pipe 3 correspondence, feed the conic tower type bellows 5 and the case 7 that leaks informaton respectively, the case 7 that leaks informaton feeds atmosphere by the tail pipe 11 that leaks informaton.

Fig. 3 shows the section of Figure 1A-A volute bellows 1 and furnace shell 9.In the cavity between refractory brick furnace wall 10 and furnace shell 9 triangle hollow pipe 3 is set, fill by fire clay 12 between every triangle hollow pipe 3, the bight end of its hollow pipe is corresponding on the burner hearth refractory brick furnace wall 10, the angular range of triangle hollow pipe 3 should be between 10 °-45 °, to guarantee that the external surface area that hollow pipe forms has enough heating surface areas, the cavity of formation has enough air containments and area of dissipation.

When air-flow enters volute bellows 1, the some air admission holes 2 on furnace shell 9 enter triangle hollow pipe 3, and the steam vent 4 on its furnace shell 9 enters conic tower type bellows 5 again, and after tuyere tube 6 preheated gas flow is injected in the stove.The part air quantity that increases for the degree of supercooling that improves burner hearth, then air-flow continues downwards along triangle hollow pipe 3, enters the case 7 that leaks informaton by steam vent 8, enters atmosphere or collects its and use through the tail pipe 11 that leaks informaton again.

Claims (3)

1, cooling device in the furnace cupola air, comprise furnace shell and furnace shell inner lining refractory block furnace wall, be separately installed with the volute bellows by the following position of the fusion zone of furnace shell, the conic tower type bellows, the case and the tail pipe that leaks informaton leak informaton, conic tower type bellows bottom also is provided with the tuyere tube that feeds in the stove, it is characterized in that: the cavity between refractory brick furnace wall (10) and furnace shell (9) is distributed with triangle hollow pipe (3), and each pairing furnace shell of triangle hollow pipe (3) (9) is provided with some air admission holes (2) and steam vent (4 and 8), respectively conducting volute bellows (1), conic tower type bellows (5), case (7) and the tail pipe that leaks informaton (11) leak informaton.

2, by cooling device in the described furnace cupola air of claim 1, it is characterized in that: the angular range of triangle hollow pipe (3) should be 10 °-45 °.

3, by cooling device in the described furnace cupola air of claim 1, it is characterized in that: the bight end of triangle hollow pipe is corresponding on the burner hearth refractory brick furnace wall (10).

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