JPS6231977B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a top structure of a reactor, and particularly to a top structure of a reactor that generates heat during reaction.

FIG. 1 is a vertical cross-sectional view showing the schematic structure of a conventional gas reactor, which generates heat during reaction. Reference numeral 10 denotes a container, which is composed of a container body 12 and an upper cover 14 detachably attached to the upper part of the container body 12. A catalyst holding cylinder 16 is disposed inside the container 10, and a catalyst is filled inside the catalyst holding cylinder 16 to form a catalyst packed bed 18.
is formed. The lower end of the raw material gas is the container body 1
2 From the supply pipe 20 protruding outside to the catalyst packed bed 1
8, flows into the gap 22 between the holding cylinder 16 and the container body 12 while undergoing a reaction, passes through the space 24 at the top of the container, and is taken out from the outlet 26. A cooling pipe 28 is provided to remove the heat generated as a result of this reaction. Cooling pipe 28
are the lower ring header 30 and the upper ring header 3
2, and the lower ring header 32 is connected to a cooling water introduction pipe 34. Water introduced from the cooling water introduction pipe 34 passes through the cooling pipe 28 from the pipe 34 and the lower ring header 30, absorbs reaction heat and enters the upper ring header 32 while boiling, and then flows into the branch pipe 36 and the branch pipe 36. is discharged outside the container 10 through the discharge pipe 38 to which it is connected.
A flange 40 is provided in the middle of the discharge pipe 38. In addition, a branch pipe 3 is provided at the bottom of the container 10.
6. An internal device support 42 is provided to support the upper ring header 32, cooling pipe 28, lower ring header 30, etc. 43 is a container support.

Such a reactor is required to satisfy the following structural conditions.

First, the discharge pipe 38 sufficiently withstands the load caused by the difference in coefficient of thermal expansion between the container 10 and the cooling pipe 28, and also connects the upper part of the internal device horizontally through the branch pipe 36 and the upper ring header 32. It must have sufficient strength to prevent touching, and be attached to the upper cover 14 with sufficient force.

Second, in sealing the gas inside the container 10, it is easy and reliable to take measures such as tightening from the outside without disassembling the upper cover 14 in the event that gas leaks from the container. For example, it has a structure that allows for.

Furthermore, thirdly, when the upper cover is disassembled for replacing or replenishing the catalyst 18, inspecting the internal device, etc., the structure is such that the upper cover can be disassembled without involving the internal device in any way.

However, in the structure shown in FIG. 1, since the flange 40 must be removed before the top cover 14 is disassembled, it is necessary to provide a manhole 44 for performing this work. Also flange 40
It is also necessary to secure a work space for dismantling. Furthermore, depending on the pressure conditions inside and outside the discharge pipe 38, there is a possibility that gas may leak to the steam side (or vice versa). Furthermore, it is difficult to check for such leakage during operation, and it is also impossible to take measures such as tightening.

FIG. 2 is a diagram showing the structure of a connecting portion between an upper ring header 32 and a discharge pipe 38 in a device according to a different conventional example. In this conventional example, a flange 46 is provided in the middle of the branch pipe 36. However, the disadvantages associated with the removal of the flange 46 are almost the same as those of the conventional example shown in FIG.

FIG. 3 is a sectional view of a joint between the upper cover 14 and the discharge pipe 38 according to a different conventional example. In this example, a large diameter through hole 48 is bored in the upper cover 14, and a flange 50 is provided in this through hole 48. On the other hand, a flange 52 is fixed in the middle of the discharge pipe 38.
2 and the flange 50 are connected by a connecting plate 54 and bolts 56 and 58. Further, gaskets 60 and 62 are interposed between the connecting plate 54 and the flanges 50 and 52. In the conventional example shown in FIG. 3, there is no disadvantage in disassembling the upper cover 14, but due to the load applied to the discharge pipe 38 due to the difference in thermal expansion between the container and the cooling pipe, the gasket 60 on the inner peripheral side Since non-uniform deformation force is applied to both the gasket 62 and the gasket 62 on the outer circumferential side, the sealing performance of either one tends to deteriorate, resulting in a problem that the sealing reliability of high-pressure gas is poor. Further, there is also the problem that the diameter of the flange 50 becomes large due to its structure.

FIG. 4 shows an upper cover 14 according to a different conventional example.
FIG. 3 is a cross-sectional view of the joint between the drain pipe and the discharge pipe 38. FIG. In this example, the exhaust pipe 38 is attached via an expansion 64, and the gas exhaust pipe 38 is attached via an expansion 64.
Although this design reduces the load applied to the flange 50 and improves the sealing reliability, the problem of increasing the diameter of the flange 50 cannot be avoided, and since it is an expansion of the external pressure structure, the internal There is a problem in preventing the device from shaking in the horizontal direction, and there is a drawback that it cannot be used depending on the gas side pressure due to its strength.

An object of the present invention is to provide a top part of a reactor that can sufficiently prevent the internal equipment of the container from shaking, that prevents the sealing performance from decreasing due to the load caused by the difference in thermal expansion, and that allows the top cover of the container to be easily disassembled and assembled. It is intended to provide structure.

The top structure of the reactor according to the present invention has a flange fixed in the middle of the discharge pipe, the upper surface of the flange contacts the inner surface of the upper cover around the through hole through the gasket, and is implanted on the flange. The discharge pipe is fixed to the upper cover of the container by a bolt inserted into a bolt hole drilled around the through hole of the container and a nut screwed onto the bolt from the outside of the upper cover.

As a result, the discharge pipe is firmly fixed to the upper cover, which prevents the internal equipment of the container from shaking in the horizontal direction, and because there is only one gasket in place, it is possible to prevent the internal equipment of the container from shaking in the horizontal direction. There is little risk of deterioration in sealing performance, and the upper cover can be lifted upward as it is by removing the nut from the outside of the container, making it easy to disassemble and assemble.

The present invention will be explained in more detail below with reference to the drawings.

FIG. 5 is a schematic longitudinal cross-sectional view of a reaction apparatus according to an embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional view of the portion surrounded by FIG. 5. A male thread 68 is cut into the protruding end of the discharge pipe 38, and a threaded flange 66 is screwed thereto. Further, a flange 70 is fixed in the middle of the discharge pipe 38, and a bolt 72 is installed in this flange 70. On the other hand, upper cover 1
A mounting flange 7 is provided on the center side of the through hole 48 of 4.
4 is fixed, and this mounting flange 7
4 is provided with a bolt insertion hole 76. The bolt 72 is inserted through the bolt insertion hole 76 and tightened with a nut 78 from the outside. Also, a gasket 8 is installed between the flanges 70 and 74.
0 is interposed.

The other configurations are the same as those shown in Fig. 1 above.
Identical or equivalent parts are designated with the same reference numerals.

In the embodiment of the present invention constructed in this manner, the discharge pipe 38 is connected to the container 10 via the flange 70.
Since it is firmly connected to the upper cover 14 of
Horizontal shaking of the upper part of the internal device can be sufficiently counteracted via the branch pipe 36. Further, the high pressure gas inside the container 10 is reliably sealed because the flange 70 and the mounting flange 74 are tightly fastened together with the gasket 80 provided in one place, unlike the conventional example shown in FIG. . Also, during operation, if necessary, remove the nut 7 from the outside of the container 10.
8 can be tightened, and gas leakage during operation can be reliably prevented. That is,
Since the discharge pipe 38 is firmly fixed to the upper cover 14, it is possible to sufficiently prevent the internal device of the container 10 from shaking in the horizontal direction, and the gasket 80 can be fixed in one place even against the load caused by the difference in thermal expansion. Because there is
There is little possibility that the sealing performance will deteriorate. By removing the nut 78 from the outside of the container 10, the upper cover 14 can be lifted upwards.
Its disassembly and assembly become easy.

If the length of the discharge pipe 38 protruding to the outside of the container 10 is short and the threaded flange 66 is removably screwed onto the projecting end, the upper cover 14 can be simply lifted upward by removing the threaded flange 66 during disassembly. This not only creates a work space below it, but also allows it to be completely separated from the discharge pipe 38, improving work safety.

As described above, according to the present invention, the mounting strength of the discharge pipe can be made sufficiently high, and the load caused by the difference in thermal expansion can be sufficiently resisted.

The discharge pipe will be able to sufficiently support the shaking of the upper part of the internal device, further increasing the safety of the device.

The top of the container can be dismantled without involving the internal equipment, thereby eliminating the need for a manhole or a working space in the top of the container for disassembly.

Not only is gas sealing highly reliable, leaks can be easily inspected or tightened.

The diameter of the discharge pipe through hole at the top of the container may be a size that matches the diameter of the discharge pipe, and it is sufficient that the diameter is small.

There is no restriction due to design conditions such as pressure and temperature, and there is a high degree of freedom in equipment design.

It has excellent effects such as

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a conventional reactor, Fig. 2 is a side view showing the configuration of a connection between a conventional upper ring header and a discharge pipe, and Figs. 3 and 4 are devices according to different conventional examples. 5 is a vertical sectional view of the top part, FIG. 6 is a vertical sectional view of the device according to the embodiment of the present invention,
FIG. 3 is an enlarged view of the portion shown in the figure. 10... Container, 12... Container body, 14... Upper cover, 16... Catalyst holding cylinder, 18... Catalyst packed bed, 20... Gas supply pipe, 28... Cooling pipe, 3
0... Lower ring header, 32... Upper ring header, 34... Cooling water introduction pipe, 36... Branch pipe,
38... Discharge pipe, 40... Flange, 42... Internal device support, 44... Manhole, 46...
Flange, 48...through hole, 50...flange,
50...Flange, 54...Connecting plate, 56, 58
...Bolt, 60, 62...Gasket, 64...
...Expansion, 66...Flange, 68...
...Male thread, 70...flange, 72...bolt,
74...Mounting flange, 76...Bolt insertion hole, 78...Nut, 80...Gasket.

Claims (1)

[Scope of Claims] 1. A reaction device that is housed in a container and generates heat as a result of a reaction, and inside the container, a plurality of cooling medium flow pipes are vertically arranged to absorb the reaction heat generated. These cooling medium flow pipes are connected to a discharge pipe above the inside of the container, and the discharge pipe is inserted into a through hole provided at the top of the container and protrudes to the outside. In a reactor in which the top side serves as an upper cover and is removably assembled on the container body below, a flange is fixed in the middle of the discharge pipe, and the upper surface of the flange is connected to the upper part around the through hole through a gasket. A bolt that contacts the inner surface of the cover and is implanted in the flange and is inserted into a bolt hole drilled around the through hole of the container, and a nut that is screwed onto the bolt from the outside of the upper cover. A top structure of a reactor, characterized in that a discharge pipe is fixed to the top cover of a container. 2. The top structure of the reaction device according to claim 1, wherein the length of the discharge pipe protruding to the outside of the container is short, and a threaded flange is removably screwed onto the protruding end.