JPS6130070Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heat storage type heat exchanger, and particularly to a heat storage type heat exchanger equipped with a heat storage body configured by combining a kongming briquette type heat storage body and a pebble type heat storage body. Regarding heat exchangers.

[Technical background and problems of the invention]

Conventionally, as regenerative heat exchangers, the Kongming briquette type regenerative heat exchanger shown in FIGS. 1 and 2 and the pebble type regenerative type heat exchanger shown in FIG. 3 are generally known.

The Kongming briquette type heat storage type heat exchanger is a briquette type heat storage type heat exchanger, which is formed by stacking briquette type unit heat storage bodies vertically in multiple layers, each having a large number of holes through which the heat exchange medium passes, as shown in Figures 1 and 2. It is composed of a body 1, a support plate 2 that supports the weight of the heat storage body 1, a heat-resistant brick 3 that keeps the heat storage body 1 warm, a pressure vessel 4 containing these, and the like. And Kongming briquette type heat storage body 1
is heated to the required temperature by the combustor 5 placed at the top of the pressure vessel 4, while the heat exchange medium (e.g. room temperature gas) is immediately taken into the pressure vessel 4 from the inlet pipe 6 and brought to a high temperature. The heat exchange medium passes through the Kongming briquette type heat storage body 1, and at this time, heat exchange is performed with the heat storage body 1 to raise the temperature, and the heat exchange medium that has reached the required temperature is passed through the outlet pipe at the upper part of the pressure vessel 4. It is designed to be discharged from 7 onwards.

By the way, in this type of heat exchanger, the sufficiently heated lower part of the heat storage body 1 is suddenly exposed to the heat exchange medium at room temperature, so the thermal shock resistance of the heat storage body 1 becomes a problem. However, since the Kongming briquette type heat storage body 1 generally has excellent thermal shock resistance, there is no fear that the heat storage body 1 will be cracked or damaged due to thermal shock.

Further, since the lower part of the heat storage body 1 supports the weight of the heat storage in the upper layer and is heated to a high temperature, there is a risk of creep occurring. However, since the Kongming briquette type heat storage body 1 is in surface contact with each other, there is no risk of locally concentrated load being applied, and the occurrence of creep at high temperatures is extremely small. Therefore, there is no cracking or damage to the heat storage body 1 due to this.

Furthermore, the heat exchange medium can be a high-speed blowing wind cylinder or
When used as a working fluid for an MHD (magneto-hydro-dynamic) generator or the like, it is required that the fluid be at a high pressure when being discharged from the outlet pipe 7. For this reason, it is necessary to make the heat exchange medium passing through the heat storage body 1 under high pressure and at high speed, which may cause a floating phenomenon in the upper part of the heat storage body 1. However, since the Kongming briquette type heat storage body 1 itself has sufficient weight, there is no possibility that it will withstand the passing pressure of the heat exchange medium and cause a floating phenomenon.

As described above, the Kongming briquette heat storage type heat exchanger has many advantages, but on the other hand, the heat transfer area of the heat storage body 1 is limited to the holes, so the heat transfer area is small, and there is no sufficient heat transfer area. In order to ensure this, a large volume of heat storage is required, which has the disadvantage that the heat exchanger becomes very large.

On the other hand, as shown in FIG. 3, the pebble heat storage type heat exchanger includes a pebble heat storage body 8 formed by stacking multiple layers of spherical heat storage units called pebbles, a support plate 2 that supports the weight of this heat storage body 8, It is composed of heat-resistant bricks 3 that keep a heat storage body 8 warm, and a pressure vessel 4 that includes a combustor 5, an inlet pipe 6, and an outlet pipe 7.

By the way, in this type of heat exchanger, since the pebbles are in point contact with each other, most of the surface area of the individual pebble balls is effectively used as a heat transfer surface, and the heat transfer area is greatly expanded, making it possible to Compared to body 1, a heat storage body having the same heat capacity can be constructed more compactly.

However, the thermal shock resistance of the lower part of the pebble heat storage body 8 is generally inferior to that of the Kongming briquette heat storage body 1, and since the pebbles are in point contact with each other, the load is locally concentrated at high temperatures. Creep is likely to occur. For this reason, the pebbles are likely to crack or break, especially in the lower part of the heat storage body 8.

In addition, at the top of the heat storage body 8, high pressure
It has no choice but to counteract the pressure of the passing heat exchange medium at high speed using only its own weight. However, since the individual pebbles are lightweight, they cannot withstand the pressure of the heat exchange medium passing through them, and a phenomenon occurs in which the top layer of pebbles floats up. Therefore, the pebbles may violently collide with each other in the uppermost layer of the pebbles, which may cause cracks or damage to the pebbles.

[Purpose of invention]

The present invention was devised in view of the current situation, and its purpose is to provide a heat storage body with excellent thermal shock resistance and creep resistance, without the risk of floating phenomenon, and with a compact structure. The objective is to provide a heat storage type heat exchanger that can be used.

[Summary of the idea]

The present invention is a method of arranging a plurality of plate-shaped perforated briquette-type heat storage bodies at any intervals above and below,
The vertical gap between the perforated briquette heat storage bodies is maintained by a spacing member, and the space formed between the upper and lower perforated briquette heat storage bodies is filled with a pebble-type heat storage body, thereby improving the thermal shock resistance and creep resistance of the heat storage body, preventing the floating phenomenon, and making it compact.

[Example of idea]

The present invention will be explained below based on an embodiment shown in FIGS. 4 and 5.

In the figure, 4 is a vertically long pressure vessel having an inlet pipe 6 at the lower end and an outlet pipe 7 near the upper end, and heat-resistant bricks 3 are arranged on the inner peripheral surface of the pressure vessel 4. A combustor 5 is installed at the top of the pressure vessel 4. Inside this container 4, as shown in FIG. 4, a heat storage body 10 whose lower end is supported by a support plate 2 is disposed.

As shown in FIG. 4, this heat storage body 10 includes four disk-shaped pore briquette type heat storage bodies 11 arranged at required intervals in the vertical direction, and two pore briquette type heat storage bodies 11 on top and bottom.
A cylindrical briquette heat storage body 13 that encloses the pebble heat storage body 12 and maintains the vertical distance between the two adjacent perforated briquette heat storage bodies 11. It consists of

Next, the effect will be explained.

The heat storage body 11 disposed within the pressure vessel 4 is heated to a required temperature by the combustor 5 disposed at the top of the pressure vessel 4, as shown in FIG. Immediately thereafter, a high-pressure, high-speed room temperature heat exchange medium is introduced into the pressure vessel 4 from the inlet pipe 6, and the heat storage body 10 is introduced into the pressure vessel 4 through the inlet pipe 6.
While passing through the interior, heat exchange takes place and the temperature is raised to the required temperature. The heated heat exchange medium passes through the outlet pipe 7.
is discharged from.

By the way, the lower part of the sufficiently heated heat storage body 10 is exposed to the heat exchange medium at room temperature.
Since the perforated briquette type heat storage body 11 having excellent thermal shock resistance is disposed at the lowest part of the heat storage body 10, the heat storage body 11 will not be cracked or damaged due to thermal shock. The heat exchange medium entered at room temperature undergoes heat exchange when passing through the lowest pore briquette type heat storage body 11, and then passes through the pebble type heat storage body 12 placed above it. At this time, the temperature of the heat exchange medium has already risen to the same level as the pebble layer temperature, so there is no longer any risk of thermal shock occurring.
Pebble cracking and breakage are effectively avoided. Since the pebble type heat storage body 12 has a much wider heat transfer surface area than the pore briquette type heat storage body 11, most of the heat exchange is performed in this pebble layer.

On the other hand, the weight of the heat storage body 10 is supported by the strong-strength Kongming briquette heat storage body 11 and the briquette type heat storage body 13 that holds it in position. For this reason,
Almost no load is applied to the pebble type heat storage element 12 contained in both the briquette type heat storage elements 11 and 13, and no creep of the pebbles occurs at high temperatures. This effectively avoids cracking and breakage of the pebble.

Furthermore, when the high-pressure, high-speed heat exchange medium passes through the uppermost layer of the heat storage body 10, a force acts to push up this portion. However, there is a heavy Kongming briquette type heat storage body 1 on top of the top pebble layer.
1, there is no possibility that the upper end portion of the heat storage body 10 will rise.

By configuring the heat storage body 10 by combining the briquette type heat storage bodies 11 and 13 and the pebble type heat storage body 12, it has excellent impact resistance and creep resistance, and there is no fear of floating phenomenon occurring. Moreover, a compact heat storage body can be obtained.

6 and 7 show another embodiment of the present invention, in which the cylindrical briquette heat storage body 13 in the previous embodiment is replaced with a columnar heat storage body 14 to form the Kongming briquette heat storage body 11. It was designed to be supported.

That is, in the figure, 4 has an inlet pipe 6 at the lower end.
However, each pressure vessel is provided with an outlet pipe 7 near its upper end, and inside the pressure vessel 4 whose circumferential surface is covered with heat-resistant bricks 3 is a heat storage body 20 whose lower end is supported by a support plate 2. are arranged. This heat storage body 20 is heated to a required temperature by a combustor 5 disposed at the top of the pressure vessel 4.

As shown in FIGS. 6 and 7, the heat storage body 20 includes four disk-shaped kongming briquette type heat storage bodies 11 arranged at required intervals in the vertical direction, and two kongming briquette type heat storage bodies 11 on the upper and lower sides. It consists of a pebble type heat storage body 12 filled in a space formed by a pebble type heat storage body 12, and four columnar heat storage bodies 14 arranged between the two upper and lower perforated briquette type heat storage bodies 11 to maintain the vertical spacing. has been
The medium to be heat exchanged taken in from the inlet pipe 6 undergoes heat exchange while passing through this heat storage body 20, and its temperature rises.
Thereafter, it is discharged from an outlet pipe 7.

However, by configuring like this,
Heat storage body 20 of pebble type heat storage body 12 with a large heat transfer area
The volume occupied by the heat storage body 10 is larger than that of the heat storage body 10, and the heat storage body 20 and the heat exchanger can be made more compact accordingly.

[Effect of idea]

As explained above, in the present invention, the pebble type heat storage element is filled between the Kongming briquette type heat storage elements whose vertical distance is maintained by the spacing member, so that the load of the heat storage element is not applied to the pebble type heat storage element. There are almost no Therefore, pebble creep does not occur under high temperatures. In addition, since the Kongming briquette type heat storage body is disposed on the top of the heat storage body, no floating phenomenon occurs in the heat storage body, and cracking and damage of the pebbles can be effectively avoided. Therefore, fine powder produced by damage to the heat storage element will not be mixed into the heat exchange medium.

Moreover, since most of the volume of the heat storage body is occupied by the pebble type heat storage body, a large heat transfer area can be secured, and the heat storage body and the heat exchanger can be made compact.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional view showing the configuration of a conventional Kongming briquette type regenerative heat exchanger, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is the configuration of a conventional pebble type regenerative type heat exchanger. FIG. 4 is a vertical cross-sectional view showing one embodiment of the present invention, FIG. 5 is a cross-sectional view taken along the line -- of FIG. 4, and FIG. 6 is a longitudinal cross-sectional view showing another embodiment of the present invention. FIG. 7 is a sectional view taken along the line -- in FIG. 6. 2... Support plate, 4... Pressure vessel, 5... Combustor, 6... Inlet pipe, 7... Outlet pipe, 10, 20...
... Heat storage body, 11... Kongming briquette type heat storage body, 12...
Pebble type heat storage body, 13... Briquette type heat storage body, 14...
...Heat storage body.

Claims (1)

[Claims for Utility Model Registration] 1. A heat storage device is placed inside a heat exchanger, and a heat exchange medium taken in from the lower part of the heat exchanger is exchanged through the inside of the heat storage body, and the heated heat exchange medium is heated. In the heat storage type heat exchanger that is taken out from the upper part of the heat exchanger, the heat storage body includes a plurality of plate-shaped pore briquette type heat storage bodies arranged vertically at arbitrary intervals,
It is characterized in that the vertical spacing between the two kongming briquette heat storage bodies is maintained by a spacing member, and the space formed between the upper and lower kongming briquette heat storage bodies is filled with pebble heat storage bodies. Regenerative heat exchanger. 2. The regenerative heat exchanger according to claim 1, wherein the spacing member is constituted by a cylindrical briquette type heat storage body filled with a pebble type heat storage body.