JPS601555B2 - Block type heat exchanger - Google Patents

Description

[Detailed description of the invention] The present invention relates to a block type heat exchanger.

From the viewpoint of effective use of thermal energy, it is basically required to raise the operating temperature of the heat exchanger as high as possible.

However, it is difficult for conventional metal heat exchangers to operate at temperatures as high as 1000° or higher due to limitations such as the heat resistance of the materials used. The present invention aims to provide a heat exchanger using a reliable ceramic material that has excellent material properties against such high temperatures.

Moreover, this heat exchanger can be used in heat exchangers that operate at high temperatures, such as the scorching furnace recubulators currently used in the steel industry and the high-temperature heat exchangers for nuclear steelmaking using multipurpose high-temperature gas furnaces. be. The present invention will be described below based on drawings showing an example of implementation.

In the figure, 1 and 2 are an upper header and a lower header attached to both upper and lower ends of a vertical cylindrical metal body 3;
. . . are ceramic heat transfer blocks stacked vertically between the upper header 2 and the lower header 2, and as shown in FIG. The ears in the vertical direction, which are divided into left and right halves, are integrally formed. Reference numeral 5 denotes a fireproof heat insulating material attached to the inner surface of the body 3, and a space 6 for a low temperature fluid flow path is formed between this heat insulating material 5 and the heat transfer blocks 4.

7... are holes for high-temperature fluid passages formed to penetrate vertically in each heat transfer block 4, and 8... are low-temperature fluid flow passage holes formed to penetrate horizontally in each heat transfer block 4. This is a hole for a fluid flow path.

The high-temperature fluid flow passage holes 7 of the heat transfer blocks 4 stacked in plurality pass through each other through recesses 9 formed on both the upper and lower end surfaces of each heat transfer block 4. Also, the high temperature fluid flow path hole 7 of the lowest heat transfer block 4...The lower end communicates with the center hole 1O' of the lower header 2, and the high temperature fluid flow path hole 7 of the uppermost heat transfer block 4. ...The upper end fits into the center hole 11 of the upper header. Regarding the low temperature fluid flow path holes 8..., the uppermost heat transfer block 4
from the flow path hole 8 of the lowest heat transfer block 4 to the flow path hole 8 of the lowest heat transfer block 4.
Boundary plates 12 are provided to partition the low-temperature fluid flow path space 6 between the heat transfer blocks 4 and 4 so that the low-temperature fluid flows in a meandering manner. Furthermore, there are mojiyama boards 13 between the upper header and the upper end of the uppermost heat transfer block 4 and the upper end of the heat insulating material 5, and between the lower header 2 and the lower end of the lowermost heat transfer block 4 and the lower end of the heat insulating material 5. It is provided. By the way, to these upper parts there is a header 1, a lower header 2, a heat transfer block 4..., a jamb board 12...,
13. Rivers are made of ceramics such as silicon carbide or silicon nitrite. Also, 14・
. . . is a ceramic fiber packing interposed between the baffle plate 12 and the heat transfer block 4, and 15 is the baffle plate 13 and the heat transfer block. 4 and the top header,
This is a packing made of ceramic fiber that is interposed between the lower header 2 and the lower header 2. Although not shown in the drawing,
The front surfaces of the jamb plates 12, 13 and the heat insulating material 5 are fixed with a ceramic bond, a high temperature coating material, or the like. Furthermore, 16 is a low temperature fluid inlet formed on the side near the upper end of the body 3, and j7 is a low temperature fluid outlet formed on the side near the lower end of the body 3. The heat insulating material 5 is provided. Reference numeral 18 denotes a metal cover that presses the upper header against the body 3 side in order to support the upper header 1 on the upper end of the body 3. a bolt 21 on the floating flange 20 that engages with the ring 19;
Nut 22 loosens the cord, floating flange 2 and body 3
It is connected by bolts 21 and nuts 22 to an upper end flange 23 of the flange 23 and a packing holder 25 which holds a compressed ceramic fiber gland packing 24 between the flange 23 and the flange 23.

Also, the packing retainer 25 is attached to another bolt 2 to the flange 23.
1. Connected by a nut 22. That is, the gland packing 24 is installed to absorb the difference in thermal expansion between ceramic and metal, and is bolted with a metal packing holder 25, and at the same time, the metal floating flange 20 is tightened with a bolt.
The structure is such that they are bolted together. Reference numeral 26 denotes a metal cover for supporting the lower header 2 at the lower end of the fuselage 3 and for holding the sodder 2 against the fuselage 3 side. It is connected and fixed by.

Next, the operation of the present invention will be explained. Normally, high-temperature fluid flows through the vertical passage holes 7..., and the horizontal passage holes 8...
Flow a low-temperature fluid through...

The high-quality fluid enters the center hole 10 of the lower header 2 through a pipe (not shown), passes through the high-temperature fluid flow path holes 7 in the vertical direction of each heat transfer block 4, and passes through the center of the upper header. It flows out from the hole 11 through a pipe (not shown). On the other hand, the low-temperature fluid passes through a pipe (not shown) and enters the body 3 from the low-temperature fluid inflow row 6 near the upper end of the body 3, and enters the lateral passage holes 8 of each heat transfer block 4 and the inside of the body 3. It flows in a meandering manner through the passage space 6 and flows out from the low temperature fluid outflow row 7 near the lower end of the body 3 through a pipe not shown. In this way, heat exchange is performed by the high temperature fluid flowing through the vertical passage holes 7 of each heat transfer block 4 and the low temperature fluid flowing through the horizontal passage holes 8. . The block heat exchanger of the present invention can be implemented as described above,
The following effects can be obtained. 1 For example, soaking furnace tile recubulators have the problem of reduced durability due to deterioration of heat exchanger tubes, but since the heat exchanger of the present invention does not use heat exchanger tubes, problems such as the structure and strength of heat exchanger tubes are resolved. be done.

2. In a shell-and-tube heat exchanger made of ceramic, it is difficult to attach the heat exchanger tube and the tube plate using the ceramic heat exchanger and take measures against thermal expansion of the heat exchanger tube. However, according to the present invention, there are no such problems.

3. With ceramic heat storage type exchangers, for example, when reducing gas containing hydrogen as the main component is used in nuclear steel manufacturing, it reacts with graphite, which is the constituent material of the reactor core, due to carryover (carrying of fluid), resulting in safety concerns for the reactor. However, since the heat exchanger of the present invention is of the partition type, there is no such problem.

4 The heat exchanger of the present invention has a simple structure because it is made up of a combination of heat transfer blocks, and there are no joints of ceramic materials, making use of the characteristics of ceramics that are resistant to compression.

5. The heat exchanger of the present invention is compact and easy to assemble and partially modify.

6. In the embodiment shown in the drawings, the heat exchanger is configured vertically and horizontally, but it is also possible to configure it horizontally.

7. Since the heat transfer block and wall board are made of ceramic, the temperature on both the process side and the service side is 1000o.
It is possible to operate satisfactorily even if the temperature is 0 or more.

8. Since the vertical ears are integrally formed on both sides of the ceramic heat transfer block, there is no need to provide a separate longitudinal board as in the past, and assembly can be easily performed.

9. Recesses that are suitable for vertical fluid flow passage holes are actively formed on both the upper and lower end surfaces of the ceramic heat transfer blocks, so when each heat transfer block is butted against each other, the vertical fluid flow passages can be closed. The lotus can be passed through the hole very easily.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, and FIG. 1 is an overall vertical sectional view, FIG. 2 is a partially cutaway plan view of a heat transfer block, and FIG. 3 is a front view of the heat transfer block. 1...Top header, 2...Tread to the bottom, 3...
・Body, 4...Heat transfer block, 5...Insulation material, 6.
... Space for low temperature fluid flow path, 7... Hole for high temperature fluid flow path,
8... Low temperature 0 fluid flow path hole, 9... Recessed part, 10,
11... center hole, 12, 13... wall board, 16.
...Cryogenic fluid inlet, 17...Cryogenic fluid outlet. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 A large number of holes for fluid flow paths are formed in the vertical direction and in the lateral direction, and vertical ears are integrally formed on both sides, and the upper and lower end surfaces communicate with the holes for fluid flow paths in the vertical direction. A plurality of ceramic heat transfer blocks each having a concave portion formed therein are stacked in a metal body whose inner surface is provided with a fireproof heat insulating material so that the internal space of the body is divided into left and right halves by the ears, and each block is The fluid flow passage holes in the vertical direction are communicated with each other through the recessed portion, and the horizontal fluid flow passage holes are communicated with each other in a meandering manner by interposing a jamb board between each abutting surface. 1. A block type heat exchanger characterized in that heat exchange is performed by flowing a high-temperature fluid into one fluid passage hole and flowing a low-temperature fluid into the other fluid passage hole.