JPS5932178B2 - Multi-hole tube-encased screen tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screen tube that can be used as a distributor (liquid distributor) or collector (juice container) installed in a packed column in a packed column type catalytic reaction device, deodorizing device, etc. .

For example, as shown in Fig. 1, a packed column type catalytic reaction apparatus
A catalyst 3 is placed on a screen-shaped catalyst receiver 2 installed in the column 1.
The device is constructed by installing a distributor 4 above which supplies a predetermined fluid such as liquid or gas (here, liquid will be explained as an example for convenience). The liquid is dispersed and dripped from the small hole 4a, the catalyst 3 is reacted appropriately, and the reaction liquid is transferred to the catalyst receiver 2.
The sample is taken out from the outlet 1a via the outlet 1a.

In this way, conventional catalytic reaction equipment has a structure in which the distributor and catalyst receiver are installed separately, but in such a structure, the packed tower is large-scale, and when the number of catalyst layers to be packed becomes multi-layered, the number of catalyst receivers becomes large. In addition, if the catalyst is divided into multiple layers, there will be many spaces that are not filled with catalyst, and the space in the packed column will not be used efficiently.

Furthermore, since the distributor requires that the liquid flow out evenly, the installation work is extremely troublesome, and the work required to install a large number of distributors is extremely large.

This invention was made with the aim of solving the above-mentioned difficulties of the multilayer catalyst-packed tower type catalytic reaction apparatus, and it uses a screen cylinder with a novel configuration that has both fluid distribution and collection functions and catalyst holding functions as a catalytic converter. By embedding the catalyst inside the column, there is no need for a catalyst receiver, which was previously considered essential, and there is no need for a large amount of labor to install the distributor.Furthermore, by arranging the catalyst in one layer, the space utilization rate inside the packed column can be improved. This is a major improvement.

The problem when embedding a distributor in a catalyst is that if the fluid dissipated from the distributor causes turbulence, it will not be uniformly distributed in the catalyst, and especially in a reactor where the catalyst is constantly moved, There is a risk that the movement will not be carried out smoothly and that a mishap may occur.

In the present invention, turbulent flow and clogging can be completely prevented by forming a screen tube that surrounds the porous pipe at a predetermined interval from wire wound at an appropriate pitch and a support member that supports the screen tube. Can be done.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 2 shows a basic embodiment of this invention f-circle A
The support rods 11 are for supporting the wires 12, and a plurality of them are arranged in a cylindrical shape at appropriate intervals.

The wires have a wedge-shaped cross section and are spirally wound around the rod 11 at an appropriate pitch (an interval that does not allow the catalyst or the like to enter), and a slit 12a is formed in each wire.

A pipe 13 is disposed on the axis of a cylinder (closed at both ends) made up of a rod 11 and a wire 12.

This pipe 13 has a through hole 13a that communicates from the inner circumference to the outer circumference.
are being opened in large numbers throughout the area.

The end of the pipe 13 is closed. A branch pipe 14 is attached to the pipe 13, and a connecting flange 16,
A communication path connected to the pipe 13 via the branch pipe 14 is formed.

Support disks 17 are fixed to the pipe 13 at appropriate intervals.

This support disk 17 functions to support the support rod 11 from the inside and to hold the pipe 13 on the axis of the cylinder.

The support disk 17 is provided with a communication hole 17a for communicating the isolated space within the cylinder.

When manufacturing the screen tube 12 shown in FIG. 2, first insert the support disks 17 into the pipe 13 at appropriate intervals,
Next, the support rods 11 are fixed around the support disk 17 at appropriate intervals by spot welding or the like, and the wires 2 are further wound around the support rods 11 at appropriate pitches and fixed by spot welding or the like.

Furthermore, welding can be omitted by winding the wire 12 around the support rod 11 and fixing it by the elasticity of the wire 120.

An example of the case where the screen tube 10 shown in FIG. 2 is used as a distributor (distribution pipe) of a packed column type catalytic reaction device is shown in FIG. is a BB sectional view of a).

In this embodiment, the IJ computers 21 are arranged in two stages, upper and lower.

The distributor 21 is connected to the piping 1 as shown in Figure 3.
A plurality of screen cylinders 10 are arranged in a branch shape from 5 through flanges 16 and branch pipes 14.

Each screen cylinder 10 is closed at both ends with a lid 23, and is fixed on seven flanges 20a formed on the inner surface of the packed tower 20.

After installing the distributor 21 as above,
The catalyst 2 is introduced through the opening 20c provided at the top of the packed tower
5 to the height where the distributor 21 is completely buried.

As a result, all the preparations in the packed tower 20 are completed, and when the predetermined liquid is injected into the pipe 15 of the distributor 21, the hole 13 of the pipe 13 in each screen cylinder 10 is
This liquid is diffused in all directions from a.

This state is shown in FIG. Pipe 1 as shown in this figure
Since there is a distance from wire 3 to wire 12, simply connect pipe 1
Compared to the case where 3 is directly embedded and diffused, it can be uniformly diffused over a wide range.

Further, since the liquid is dispersed in each direction up and down from the upper and lower slits 12a, it has a significant rectifying effect in the up and down direction.

The liquid diffused by the distributor 21 is transferred to the catalyst 2
5 while performing a predetermined reaction.

The liquid that has completed the reaction passes through the opening 22a of the catalyst receiver 22 located at the bottom of the packed column 20 and is taken out from the packed column outlet 20d.

In this embodiment, the catalyst 25 is in one layer, there is no need to provide a space in the middle, the volume occupied by the catalyst in the packed column increases, and only one stage of the catalyst receiver 22 is required, compared to conventional equipment. The number of catalyst receivers installed can be reduced.

In the above embodiment, the distributors 21 are arranged in two rows, one above the other, but it is obvious that the above advantages increase as the number of rows of distributors increases.

The screen tube containing a porous tube according to the present invention can be used not only as a distributor but also as a collector (liquid collection tube).

In this case, for example, the lower distributor 21 in FIG. 3 may be used as a collector, and the reacted liquid that has descended to the lower part of the catalyst layer may be drawn into the pipe 13 through the screen tube and taken out to the outside.

In this case, the catalyst receiver 22 having an opening 22a as shown in FIG. 3 is not used, and the lower outlet 20d of the packed column is closed.

In addition, in such an apparatus, the upper and lower perforated screen cylinders are used as a distributor for a certain period of time, and after the liquid is supplied to the catalyst layer and the specified reaction is completed, the same perforated screen cylinders are used again. This operation can also be repeated by using it as a collector to collect the reacted liquid.

Note that the arrangement of the screen tubes 10 is not limited to the horizontal arrangement as shown in FIG. 3, but also the screen 2 of FIG. They can also be arranged in a houndstooth pattern as shown in Figure 5.

Alternatively, even if it is placed horizontally, it can be placed in a zigzag pattern as shown in FIG. 5C.

In the embodiment shown in FIG. 6, a support beam 30 is provided between the support disks 17 to further increase the strength.

The embodiment shown in Fig. 7 has a wide support beam 3.
1A and 31B, the wire 2 divided into semicircles is connected from one support beam 31A to the other support beam 31.
B is fixed to each other.

In the embodiment shown in FIG. 8, the space inside the cylinder is divided into two by the support beam 32, and the pipes 13-1 and 112 are respectively divided into two parts.
It is arranged so that

Although the screen cylinder in the above embodiment has a cylindrical cross section, the cross section is not limited to this, but it can also be an ellipse, or other cylindrical shapes such as an octagonal cylinder or a hexagonal cylinder.

Further, the cross-sectional shape of the wire 12 is preferably wedge-shaped, but is not limited to this, and any suitable shape such as rectangular or circular can be used.

In addition, although the above example shows the case where it is applied to a catalytic reaction device, it is also applicable to other chemical processes such as a deodorizing device,
It can be used in a wide range of applications such as filtration equipment.

Figure 9 shows an example of the case where it is applied to a p-filtration device.
A screen tube 10 is placed vertically on the bottom 42 of a pipe 1, a pipe 13 is drawn out through the bottom 42, and the liquid that has passed through the wire 10 is taken out through the pipe 13.

FIG. 10 shows a system in which the fluid is distributed and collected while being stirred.

Here, the pipe 51 is placed at the center of the column 52, and the screen cylinders 10 are radially attached to the lower end of the pipe 51, so that the pipe 51 is rotated to perform distribution and collection while stirring.

FIG. 11 shows wires 12-1 and 12-2. 12-3 is wound in multiple layers, and a different catalyst is injected between each layer, so that as the liquid discharged from the pipe 2 spreads outward, reactions occur in each layer in sequence.

As explained above, the screen cylinder of the present invention can be used both as a distributor and as a collector, and can be used for a wide range of purposes.

Particularly when used as a distributor, the catalyst bed is not divided, which increases the space utilization rate in the packed column and also saves a large number of catalyst receivers.

In addition, since the screen tubes that surround the porous pipes at predetermined intervals are formed using wires wound at appropriate pitches and support members that support the screen tubes, fluid distribution and collection are extremely efficient. , the occurrence of turbulence can be completely prevented.

Furthermore, even when used in a catalyst transfer type device, the catalyst has excellent effects such as smooth transfer of the catalyst and no clogging.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a conventional packed column type catalytic reaction apparatus, FIG. 2 is a partially cutaway perspective view showing an embodiment of the present invention, and FIG. Figure 4 shows an example of the application to a type catalytic reaction device, in which a is a front view, b is a plan view, C is a sectional view taken along line A-A in a, and Figure 4 shows a state in which fluid is dissipated from the distributor 21 in Figure 3. Figure 5 is a diagram showing another example of how the screen tubes are arranged in the packed column, and Figures 6, 7, and 8 are partially cutaway diagrams showing other embodiments of the present invention. The perspective view, FIG. 9, FIG. 10, and FIG. 11 are longitudinal sectional views showing other application examples of the present invention. 10... Screen tube, 11... Support rod, 12... Wire, 13...
・Pipe, 14... Branch pipe, 15... Piping,
17...Support disk.

Claims (1)

[Claims] 1 A plurality of rods arranged in a cylindrical shape, a wire wound around the rods at an appropriate pitch, and a plurality of through holes are opened from the inner circumference to the outer circumference, and are formed by the rods and the wires. A pipe is placed along the core at an appropriate distance from the inner surface of the core in the space inside the cylinder, and a pipe is placed along the core at an appropriate distance within the cylinder and is located at an appropriate distance from the inner surface of the core. A perforated tube-enclosing screen tube comprising a support member that supports an inner surface and holds the pipe in a position within the space.