JPS5941787A - Method and device for cooling high-temperature material - 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 The present invention relates to a method and apparatus for cooling high-temperature materials that efficiently removes the head heat of the high-temperature materials.

Conventionally, in continuous heat treatment smoke, the furnace body is bent into three planar shapes, and communicating ducts are provided in corresponding parts of the parallel outgoing and returning sides of the furnace body to circulate the short circular atmospheres of each other. ,
There is a method of preheating the low-temperature phase on the outbound side using ambient gas whose temperature has risen by cooling the high-temperature material on the return side. However, if the high temperature H is simply placed in the gas flow on the return path, the heat transfer rate will be low because the heat transfer is mainly due to anti-canal heat transfer. Preheating was not possible.

The present invention solves the above-mentioned conventional drawbacks, and aims to provide a method and apparatus for cooling a high-temperature material, which can efficiently remove the sensible heat of the high-temperature material.

However, the gist of this invention is to provide a gas permeable solid on both the upstream and downstream sides of the high-temperature material INf arranged in the gas flow path, and to allow the gas to pass through the partition.

In this invention, the term "breathable solid" refers to a solid made of a heat-resistant phase material such as metal or heptadramic, and formed into a shape having air permeability such as a net shape, a nicam shape, a folded shape, or a porous shape and having an appropriate thickness. say.

As a result of various studies on this breathable solid, the inventor found that if a partition made of breathable solid is provided near the high-temperature material in the gas flow path across the meter flow path, the high l crystal moon υ (1 heat It was found that heat was removed well.Experimental results showing this phenomenon will be explained with reference to FIGS. 1(8) to (1).

In the figure, 1 is a furnace body, 2 is a heavy h'r heated to 580'C
2000 mN in block form, 8. is a partition made of breathable solid material, made of stainless steel wire mesh (g 0.51ffl)
l! , 20 meshes) were laminated to form a rectangular plate shape. Fig. 1 (a) shows the case where the partition 8 is not provided, Fig. 1 (b) shows the case where the partition 3 is provided upstream G11l of the sheath material 2, and Fig. 1 (Q) shows the case where the partition 3 is provided on the downstream side. Figure (d)
similarly shows the case where it is provided on the upstream side and the downstream side, and t1
= Air heated to 455°C from the upstream side at a flow rate of 1.6
''/second, the air flow 1 crystallinity t2 on the downstream side shortly after the start of circulation was as shown in the figure. Compared to , by providing the partition 3, the air flow temperature t2 is approximately 1
The temperature rises from 0 to 30°C, and the positive heat of steel material 2 is efficient, l:<deprivation? It shows that it will be done. This is because the partition 8 is first heated by the radiant heat from m#A2, and the static electricity flowing through the partition is efficiently heated by the partition 3, which is made of a conductive solid with a substantial surface area and a large heat transfer coefficient. A is no good.

Next, a practical example of the present invention will be explained with reference to FIG.

In the figure, 5 is a furnace body of a heat treatment fJl furnace constructed in a U-shape in plan, 6 is an outgoing side furnace body, 7 is a return side furnace body, and 8 is a roller for conveying the heated object. Reference numeral 9 denotes a low-temperature material storage chamber through which the low-temperature material 10 charged from the charging port passes, and is formed in the forward-side furnace body 6. Reference numeral 11 denotes a high-temperature phase 12 heated by a heating device such as a radiant tube (not shown). This is a high-temperature material storage chamber through which the material passes, and is formed within the return-side furnace body 7. 18 is a low-temperature side communication path connecting the upper part of the low-temperature phase storage chamber 9 and the high-temperature material storage chamber 11; 14 is a high-temperature side communication path connecting the lower part of each storage chamber; and 15 is the ceiling of the low-temperature material storage chamber 9. An intake port 16 is provided, and 17 is a fan driven by a motor 18. Further, reference numeral 19 denotes a partition made of a breathable solid material, which is made of the same material as the partition 3 in FIG. be.

In the heat treatment furnace with the above configuration, a low temperature material 10 and a high temperature material 1
The fan 17 is driven while conveying 2 into the furnace, and the arrow 2 in the figure
As indicated by 0, there is a circulating flow situation of atmospheric gas between the low temperature material storage chamber 9 and the high temperature material storage chamber 11.

As a result of the formation, the high-7 crystal grain 12 is cooled by this circulating flow, and the temperature rises as a result of this cooling, and the atmospheric scum preheats the low-lIA moon lO. At this time, the atmospheric gas passing through this partition is heated mainly by convective heat transfer due to the partition 19 heated to a high temperature by the radiant heat from the high rM4'J12. Since it is added to the amount of heat, the atmospheric debris becomes high temperature and flows into the low temperature material storage chamber 9.

In the above heat treatment furnace, the partition 19 is arranged as shown (=I
Table 1 shows the experimental results for the cases in which the beam was attached and the case in which it was removed. The heated material 4 = A is a steel material, the initial temperature of the high temperature material 12 is 580°C, the initial temperature of the low temperature material IO is 325°C, the roller 8 is in a stopped state, and it corresponds to the elapsed time after the start of atmospheric gas circulation. The temperature on the heated side was measured.

As is clear from the table, compared to +Jil+without the partition 19, in the platform with the partition 19, both the temperature drop of the high temperature material 12 and the temperature rise of the low temperature az io paper are larger.

In the above embodiment, the partition 19 was provided only on the downstream side (gas flow side) of the still-temperature material 12, but this partition is indicated by the chain line 2 in the figure.
1, the upstream side of the high temperature material 12 (gas flow upstream ([1
11) (and it is clear from the experimental example shown in FIG. 1 that even greater effects can be obtained by providing it on both the upstream and downstream sides).

Above, we have explained the case where this invention is applied to continuous loquat/type heat treatment fJpi, but this invention is applicable to various types of heat treatment/5i,
The present invention is also applicable to batch furnaces or cases where only high temperature materials are cooled.

As explained above, according to the present invention, a partition made of a breathable material is provided on at least one of the upstream side and the downstream side of the high-temperature material in the gas flow path, and the partition absorbs the radiant heat of the high-temperature material. Since the heating of the gas is added, the sensible heat of the high-temperature material can be efficiently removed.

[Brief explanation of the drawing]

FIGS. 1(R) to (d) are longitudinal sectional views of IB gaseous solid property experiment apparatus 1A according to the present invention, and FIG. 2181 is a sectional view of a heat treatment furnace showing an embodiment of the present invention. . 8... Partition, 9... Low temperature phase storage chamber, 10... Low temperature phase, 11... High temperature phase storage chamber, 12... Sieve temperature storage, 1B
...low rfi A side communication path, 14...high temperature side communication path,
17...Fan, 19...Partition. 1 person from Daido Special Sweat Co., Ltd. Inui Ak, Ito

Claims (1)

[Scope of Claims] 1. A method for cooling a high-temperature material, in which a high-temperature material is disposed in a gas flow path, the high-temperature material is cooled by the gas, and the temperature of the gas is increased along with the cooling, the method comprising: A method for cooling high-temperature material, characterized in that a partition made of a breathable solid is provided on at least one of an upstream side and a downstream side of the high-temperature material in the container, and the gas is allowed to pass through the partition. 2. The high temperature material storage chamber and the low temperature material storage chamber are connected by a high temperature side communication path and a low temperature side communication path, and a forced circulation flow of gas is formed between the two storage chambers via the dual speed path. In the material cooling/heating device that cools the heavy temperature material and simultaneously heats the low temperature material, a partition made of a breathable solid is provided on at least one of the upstream side and the downstream side of the high temperature port in the high temperature storage chamber; A cooling/heating device for materials, characterized in that gas passes through the partition.