JPS6314811A - Cooler for metallurgical furnace exhaust gas treatment equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a cooler used in a metallurgical furnace exhaust gas treatment device.

[Prior Art] A conventional cooler for a metallurgical furnace exhaust gas treatment device will be explained with reference to FIG. In the figure, when pure oxygen is blown into hot metal in a metallurgical furnace 1 for refining, a large amount of Co gas is generated. Also, during this refining, molten slag and metal are spouted out, carried by the metallurgical furnace reaction gas, and attached to the water-cooled wall 7 of the cooler 3.

If the slag and base metal 4 that have adhered in this way are left as they are without being removed, this adhesion will gradually grow, narrowing the gas passage and causing problems in the operation of the metallurgical furnace. The cooling effect of the Co gas by the vessel 3 is also reduced.

Therefore, the vertical part of the cooling wall 7 of the cooler 3 is made into a water pipe wall so that the adhered slag and base metal 4 can easily peel off and fall. The developed shape of this vertical water pipe wall is rectangular as shown in 'M4M7C3. The widths of the fins 8 are all a, and the diameters of the water tubes 9 are all d. The cooling wall 7 is therefore vertically cylindrical.

[Problems to be Solved by the Invention] By the way, when a large amount of slag or base metal 4 adheres to the cooling wall 7 of the vertical water pipe wall of the conventional cooler 3, they are rapidly cooled and peeled off. ,the! IJ There are many cases where slag and base metal 4 peel off while maintaining their cylindrical shape. At the time of such peeling, the slag and metal do not descend vertically, but are inclined when descending, or due to manufacturing errors in the cooler 3 or thermal deformation during use, the cooling wall 7 of the cooler 3 may be partially peeled off. It often happened that it did not fall off by +1 bird.

In such a case, an impact force is applied to the slag and base metal 4 that have peeled off during non-blowing to crush them and remove them.

However, since slag and metal are extremely hard and difficult to crush, removal work requires a great deal of effort and time, which has the disadvantage of affecting the operating efficiency of metallurgical furnaces.

Therefore, in order to solve the above-mentioned problems, the present invention provides a cooler in which slag and metal that adhere to the cooling wall of the cooler, are rapidly cooled, and shrink and peel off will surely fall. It is something.

[Means for Solving the Problems] In order to solve the above problems, the cooler of the present invention has a diameter on the gas inlet side of the cooler that is larger than a diameter on the gas outlet side, and a vertical type of the cooler. Taper fins are provided at multiple locations in the circumferential direction of the water pipe wall, or tapered water pipes are provided to make the cooling wall inclined.

[Function] According to the cooler configured in this way, when the slag and metal attached to the cooling wall are rapidly cooled, contracted, peeled off, and descend, the cylindrical slag and metal do not tilt or tilt. , even if the cooler has some dimensional errors during manufacturing or thermal deformation during use,
It won't get caught, and the slag and metal will fall down due to their own weight.

[Embodiment] An embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. In FIG. 1, 1 is a metallurgical furnace, 2 is a cooler 3
This is a skirt for sealing off the space between the metallurgical furnace 1 and the metallurgical furnace 1. The cooling wall of the cooler 3 is vertically formed of a water tube wall, and the diameter D1 on the gas inlet side is larger than the diameter D2 on the gas outlet side. Therefore, the cooling wall 7' becomes an inclined surface, and the overall shape becomes a flared trumpet. Specifically, the developed shape of the cooling wall 7' of the cooler 3 is made into a fan shape as shown in FIG. 2a. As shown in Figure 2, the width of the fins 8 on the vertical water tube wall is a.

In the case of b and c, Condition 1: b (c and a depth C) Condition 2: b<c a=b Taper fins 8' are created at multiple locations in the circumferential direction, and the cooling wall 7 ′ is shaped like a trumpet with a wide hem.

Alternatively, as shown in Fig. 2C, if the pipe diameters of the water pipes 9 with vertical water pipe walls are d, e, and f, then Condition 1: e (f and dxe Condition 2: either e<f or d=f According to the above conditions, tapered water pipes 9' are formed at a plurality of locations in the circumferential direction, and the cooling wall 7' is formed into a trumpet-like shape with a wide bottom.

In FIG. 1, 5 is a water seal tank, and 6 is a space between seals.

In this embodiment configured in this manner, the slag and base metal 4 adhering to the cooling wall 7' are cooled and contracted while maintaining the cylindrical state, and are peeled off from the surface of the cooling wall 7'. The peeled slag and base metal 4 fall due to their own weight. During this falling process, since the cooling wall 7' of the cooler 3 has a flared trumpet shape, the slag and metal 4 fall reliably without being caught on the cooling wall 7'.

[Effects of the Invention] As detailed above, in the cooler according to the present invention, the diameter on the gas inlet side of the cooler is made larger than the diameter on the gas outlet side, and the cooling wall is made into a sloped surface with a wide skirt. When the slag and base metal adhering to the wall cool, contract, peel, and fall,
Even if the cylindrical slag or metal is slightly inclined, or the cooler has some dimensional errors due to manufacturing or thermal deformation during use, the slag or metal will not get caught on the cooling wall surface, and the slag or metal will be securely handled by its own weight. It can be dropped. As a result, there is no need to remove slag at all, which not only saves labor but also greatly improves the operating efficiency of the metallurgical furnace.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view showing one embodiment of the cooler of the present invention, Fig. 2 a is a drawing showing the developed shape of the cooling wall in the cooler of the present invention, and Fig. 2 and C indicate the cooling wall. A partially enlarged view showing the case where a tapered fin is provided and the case where a tapered water pipe is provided, FIG. 3 is a longitudinal cross-sectional view of a conventional cooler, and FIG. 4 a shows the developed shape of the cooling wall in a conventional cooler. Figure 4 is a partially enlarged view of the cooling wall. 1... Metallurgical furnace 3... Cooler 4... Adhering slag and metal 7'... Cooling wall 8'... Taper fin 9
′...Tapered water pipe

Claims (1)

[Claims] In the cooler of the metallurgical furnace exhaust gas treatment equipment, the cooling wall of the cooler is formed by a vertical water tube wall, the diameter of the gas inlet side of the cooler is larger than the diameter of the gas outlet side, and the vertical water A cooler for a metallurgical furnace exhaust gas treatment device, characterized in that a cooling wall is inclined by providing tapered fins or tapered water pipes at a plurality of locations in the circumferential direction of a pipe wall.