JPH0130074B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for advantageously recovering sensible heat from articles that are naturally cooled from a high temperature state to room temperature, such as high-temperature metal products taken out of molds, coils of hot-rolled steel sheets, or heat-treated products. .

Conventionally, it has not been easy to recover heat when allowing high-temperature articles, especially metal products, produced in various factories to cool. The main reason for this is that it is difficult to secure space to incorporate such heat recovery equipment into the product in the production line, and even if it were installed, it would require large-scale equipment and increase equipment costs. It was hot.

The present invention was made with the aim of resolving these problems, and provides a device for easily and efficiently recovering sensible heat from high-temperature products such as metal castings, which were conventionally left to dissipate, in a production line. A movable partition that surrounds high-temperature items in the building during the natural cooling process, a blower that creates a unidirectional upward airflow within the space surrounded by this movable partition, and a blower that creates a unidirectional upward airflow. a heat exchanger arranged to allow substantially all of the water to pass through the movable partition; The object of the present invention is to provide a heat recovery device for high-temperature articles, in which a heat transfer medium is circulated through the heat exchanger, and the entire structure is suspended from the ceiling.

The apparatus of the present invention will be explained according to the embodiment shown in the drawings. Fig. 1 shows a system in which a metal product, etc. taken out from a mold is placed on a loading platform and released at a work place or a place on the way to the next process. The figure shows a facility in which the heat released during cooling is recovered at that location, and includes a transport means (loading platform) 2 for transporting high-temperature products 1 in an atmospheric atmosphere, and a transport device on which high-temperature products 1 are stacked. a movable partition 4 for forming a space 3 surrounding the means 2; and a blower 5 for forming a unidirectional upward air flow within this space 3.
and a heat exchanger 6 arranged to allow substantially all of this upward airflow to pass through.
The movable partition 4 is bent and formed of double extensible plates.

The high-temperature product 1 is transported to the next process in the production line by a loading platform 2, but it is released and its heat is recovered at the place where it is loaded onto the loading platform 2, the place where it is unloaded from the loading platform 2, or at a place on the way. The apparatus of the present invention is configured so that a movable partition 4 is used in the building to form a heat recovery space 3, and a wind passage 7 is provided on the ceiling to guide the air in this space 3. A heat exchanger 6 is disposed along the path 7, and an air blower (exhaust fan) 5 is also installed.

The movable partition 4 may be one that surrounds all sides, but
Depending on the working space, three sides, two sides, or one side may be used. The movable partition 4 is made of a double folded flexible plate, and can be raised to an appropriate height by driving a motor 8 with a start/stop switch 9. By moving the movable partition 4 up and down, the work space or the space of the conveyance path can be changed into a heat recovery space as appropriate.

The movable partition 4 in the embodiment shown in FIG. 1 has a reflective plate made of stainless steel or the like attached to the side facing the heat recovery space 3. This is shown in the enlarged view of FIG. That is, as shown in FIG. 3, this movable partition 4 has two foldable bending plates 10 and 11.
and are suspended with a space between them so as to form a space 12. For example, a buffed stainless steel plate 13 is attached to the surface of the plate 10 on the side of the heat recovery space 3. The radiant heat of the high-temperature article 1 is reflected into the space 3. Due to the presence of the reflector 13 and the space 12, the movable partition 4 effectively functions as a heat insulating wall, and the heat within the space 3 does not substantially leak to the outside. In the case of the embodiment shown in FIG. 1, the lower end of the movable partition 4 is not lowered to the floor 16, but a slight gap is created between it and the floor 6 to perform the heat recovery operation. This gap is determined according to the capacity of the exhaust fan 5.

The exhaust fan 5 is driven by a temperature detector 18 that detects the temperature in the space 3, and starts when the temperature in the space 3 exceeds a set temperature, and stops when the temperature falls below the set temperature. . By driving this exhaust fan 5, ambient air is sucked into the space 3 from the gap at the bottom of the movable partition 4, and a unidirectional upward flow is formed to carry the heat dissipated from the high-temperature articles upward. Enters heat exchanger 6. A heat medium for heat recovery, such as water, is passed through the heat exchanger 6, and the heat recovered by this heat medium is supplied to various heat sources. If this heat exchanger 6 uses a heat pipe, its heat recovery efficiency will be further improved.

FIG. 2 shows a device substantially the same as the device shown in FIG. 1, except that the structure of the movable partition 4 has been changed, and in this case, a forced air flow passes through the movable partition 4. It's like this. In this case, the lower end 15 of the movable partition 4 is placed as close as possible to the floor 16, and the internal gap 12 at the upper end of the movable partition 4 communicates with the space 3. As a result, ambient air is sucked into the gap 12 from the lower end 15 of the movable partition 4 by driving the exhaust fan 5, enters the upper part of the space 3 while rising inside the movable partition 4, and then heats up. It will enter exchanger 6. Movable partition 4 in this case
An enlarged view is shown in Figure 4. As shown in the figure, the bending plate 10 on the side of the space 3 is made of a heat-absorbing thin metal plate, and a fin 20 is attached to the back surface thereof.
The outer bending plate 11 is made of a heat insulating material. As a result, the heat in the space 3 is transferred to the air rising within the air gap 12. In other words, this movable partition itself acts as an air-to-air heat exchanger, and at the same time,
It also functions as an insulating wall that prevents heat from dissipating to the surrounding area. In this way, the heat in the space 3 is carried by the forced air flow rising inside the movable partition 4, but a natural upward heat flow of the high-temperature article 1 and a slight upward forced flow also occur within the space 3, and all of these They join together and enter the heat exchanger 6, where heat recovery is performed as in the case of FIG.

FIG. 5 shows an example in which the device shown in FIG. 1 has been improved to further recover heat. By inserting the tip of the flexible duct 23 attached to the tip of the flexible duct 23 into the space 3 from the bottom of the movable partition 4, the exhaust gas is guided into the space 3 again, and the heat in the exhaust gas is recovered by the heat exchanger 6. This is how it was done.
At this time, a thermostat 27 installed near the outlet of the flexible duct 23 controls the opening and closing of the motor damper 24 installed in the circulation duct 22 and the motor damper 26 installed in the exhaust duct 25.
The exhaust gas is circulated to the space 3 when the exhaust gas temperature reaches a predetermined temperature or higher.

FIG. 6 shows an example in which a similar exhaust circulation system is installed in the apparatus shown in FIG. 2, and is the same as that shown in FIG. A similar circulation facility is shown. The tip of the flexible duct 23 is not limited to this example, and may be opened into the space 3 as in FIG. 5.

The device of the present invention can use the existing work space as it is as a heat recovery space, and when the device of the present invention is applied, it also shields high-temperature items, so the space that is not exposed to high temperatures is expanded, and conversely, the work space is expanded. You can also get some great effects. Furthermore, the device of the present invention is economical because it can be constructed simply and with a small number of parts without substantially modifying existing work equipment, and when the device is not in use, the movable partition can be pulled up without any hindrance to production work. There's nothing wrong with that.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the device of the present invention, Fig. 2 is a sectional view showing another embodiment of the device of the invention, Fig. 3 is an enlarged view of the movable partition in Fig. 1, and Fig. 4 is a sectional view showing an embodiment of the device of the present invention. Figure 2 is an enlarged view of the movable partition, Figure 5 is a sectional view of the device in which heat recovery equipment is added to the example in Figure 1, and Figure 6 is a device in which heat recovery equipment is added to the example in Figure 2. FIG. 1... High temperature article, 2... Transportation means (loading platform), 3
...Heat recovery space, 4...Movable partition, 5...Blower (exhaust fan), 6...Heat exchanger, 10, 11...
...Foldable bending plate, 12...Gap, 13...
...Reflector, 20...fin.

Claims (1)

[Scope of Claims] 1. A movable partition that surrounds high-temperature articles in a building during the natural cooling process, and a blower for forming a unidirectional upward airflow within the space surrounded by the movable partition; a heat exchanger arranged to allow substantially all of this upward airflow to pass through; A heat recovery device for recovering heat from high-temperature articles, in which a space is formed inside the device, the entire device is suspended from the ceiling, and a heat medium for heat recovery is circulated through the heat exchanger. 2. The apparatus for recovering heat from high-temperature articles according to claim 1, wherein the movable partition has a reflective plate attached to the surface facing the high-temperature articles. 3. A device for recovering heat from a high-temperature article according to claim 1 or 2, wherein a forced air flow is formed in the space inside the expandable plate. 4. Claim 1 in which the exhaust gas that has passed through the heat exchanger is circulated within the space surrounded by the movable partition.
3. A device for recovering heat from a high-temperature article according to item 2, item 3, or item 3.