JPS5926240Y2 - Cooling device for high temperature container outer shell - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooling structure for the outer shell of various high-temperature vessels such as steel-making furnaces.

Conventionally, when cooling the outer shell of a high-temperature container such as a steelmaking furnace, for example, a semi-circular cooling pipe 2 is installed in the outer shell 1 as shown in FIG. The cooling medium 3 is brought into contact with the shell, and the cooling medium 3 is brought into contact with the shell as shown in FIG.
There is a type of passage in which a cooling pipe is inserted into a structure 4 provided so as to be in contact with the outer circumference of the outer shell 1, and a cooling medium 3 is passed through the cooling pipe for cooling.

In the former case, the cooling medium comes into direct contact with the high-temperature outer shell, so there is a large temperature difference between the inside and outside of the outer shell, which results in high thermal stress.

Furthermore, due to embrittlement due to aging, cracks may occur in the cooling pipe 2 or the outer shell 1, which are the passages for the refrigerant, and cracks may also occur in the mounting welds on the outer shell 1 of the cooling pipe 2, often resulting in coolant leakage accidents. There are 7 outbreaks.

Furthermore, in the latter case, the outer shell 1 is indirectly cooled by cooling the structure 4, so the cooling efficiency of the high temperature container itself is extremely low compared to the former case.

The present invention addresses the above-mentioned problems, and an object of the present invention is to improve both of the above-mentioned conventional examples without reducing the cooling efficiency.

Briefly, this is a cooling type in which cooling pipes are provided so as to surround the outer periphery of a high-temperature container, and the structure is not used to prevent the refrigerant or the cooling pipes from directly contacting the outer shell.

Embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 3 and 4, a cooling pipe 2 is attached to surround the outer shell 1 of the high temperature container, and a cover 5 surrounding the cooling pipe 2 is provided.

A gap between the cooling pipe 2 and the outer shell 1 in the cover 5 is filled with a heat transfer material 6.

Note that 7 is a refractory brick constituting the inside of the furnace, and 8 is an injection port for the heat transfer material 6.

4A and 4B are cross-sectional views taken along lines AA and BB in FIG. 3.

The injection port 8 for the heat transfer material 6 is covered after the heat transfer material 6 is loaded.

5A, B, C, and D show other examples of cross-sectional views showing the state of the cooling pipe 2 and the cover 5. FIG.

In Figure D, a part of the outer shell 1 is cut out to provide a groove for the cooling pipe 2, and a flat cover 5 is provided.

The cooling medium 3 is a liquid such as water or oil, or a gas such as steam, air, or nitrogen, and is used depending on the purpose.

Further, the heat transfer material functions to transfer heat between the cooling medium 3 and the outer shell 1.

A metal with a low melting point may be charged in a molten state to fill the inside of the cover 5.

In this way, it is necessary to sufficiently cover the cooling pipe and to have high thermal conductivity.

Therefore, zinc (melting point 419.46℃) and lead (melting point 327.4℃)
℃) Using metals such as tin (melting point 231.9℃) solder (tin, zinc alloy melting point 183-230℃), the melting point of the steel material of the outer shell (SS material, SM material, steel pipe, stainless steel pipe) Considering the above, a metal with a melting point in the temperature range of 200 to 700°C is preferable.

According to the present invention, as is clear from the above explanation, the heat transfer material is filled between the cover of the cooling pipe provided around the outer shell of the high-temperature container and the outer shell, so that the outer shell of the high-temperature container has a high thermal conductivity. The large surface of the outer shell can be cooled while maintaining high cooling efficiency with the cooling medium in the cooling tubes, which are in close contact with a high heat transfer material.

Furthermore, even if the outer shell or cover may crack due to thermal stress, the presence of the filler prevents the crack from progressing to the cooling pipe.

Therefore, even if the cover is cracked, cooling can be continued without any problem.

[Brief explanation of drawings]

FIGS. 1 and 2 are side sectional views showing how a conventional cooling pipe is attached to an outer shell. FIG. 3 is a plan sectional view of a high temperature container for explaining the present invention. FIGS. 4A and 4B are sectional views taken along lines AA and BB in FIG. Figure 5A. B, C, and D are side sectional views of cooling structures showing other embodiments. 1...Outer shell, 2...Cooling pipe, 3...
...Cooling medium, 4...Structure, 5...
- Cover, 6... Heat transfer material, 7... Firebrick, 8... Inlet.

Claims (1)

[Scope of utility model registration request] It consists of a cooling pipe provided around the outer shell of the high-temperature container, a cover surrounding the cooling pipe, and a heat transfer material filled between the cover and the outer shell, and the heat transfer material is a metal with a melting point of 700°C or less. A cooling structure for the outer shell of a high-temperature container characterized by using.