JPH0122807B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a catalyst packing method and a catalyst packing apparatus for packing a granular catalyst into a large-capacity cylindrical reaction tower used in the chemical industry.

[Background technology and its problems] Conventionally, in filling a large-capacity cylindrical reaction tower with granular catalyst, the catalyst is guided from a hopper at the top outside the tower to a filling pipe suspended inside the reaction tower. A flexible pipe was connected to the lower end of the filling pipe, and workers who entered the tower operated it to disperse the catalyst and level it with a rake. If the level of the packed bed rises during this filling operation and the work becomes difficult, we adopt a method of stopping the work each time, removing the middle pipe of the filling pipe, shortening it, restarting the work, and repeating this process. It was on.

As a result, the efficiency of the work is poor and it takes a long time, and the packing density of the catalyst is uneven because the workers step on the packed catalyst. When the reaction fluid is flowed through these, a large difference in the pressure difference between the catalyst layers occurs, resulting in poor product quality and yield, and in severe cases, it may interfere with the continued operation of the equipment. There was a problem.

Furthermore, since this filling operation is carried out in the presence of flying catalyst powder, the working environment is extremely poor, and some sort of countermeasure has been desired in this respect as well.

By the way, many granular catalysts are easily pulverized by impact, and even when dropped naturally from a height of 1 meter or more, they break down into powder, reducing the catalyst's function and increasing uneven filling. There are things that can happen. In such cases, it is necessary for a worker to squeeze the tip of the flexible tube by hand and spread the powder gently to smooth the surface, which requires careful and long hours of work by skilled workers.

Therefore, there has been a strong desire for a device to solve these problems.

[Object of the Invention] The object of the present invention is to provide a catalyst that can be packed in a reaction column with a uniform density without relying on spraying or breaking-in work by an operator, and in a gentle manner that does not cause pulverization of the granules. The present invention provides a filling method and apparatus.

[Structure of the Invention] The method of the present invention includes a catalyst release device that is capable of discharging the catalyst almost uniformly into the reaction tower, and a catalyst release device that is movably suspended in the reaction tower. The catalyst is sequentially filled into the reaction tower while raising the catalyst discharger so that the distance from the surface of the catalyst is approximately within a predetermined range.

In the apparatus of the present invention, a gondola that can be raised and lowered from the outside of the reaction tower is suspended within the reaction tower approximately along the central axis of the reaction, and the gondola is equipped with a gondola that discharges the catalyst downward and toward the radial periphery. Furthermore, a catalyst replenishment device is provided which communicates with the catalyst discharger and a hopper outside the column, thereby supplying catalyst from the catalyst replenishment device to the catalyst discharger and discharging the catalyst. The catalyst is sequentially discharged from the vessel into the reaction tower, and the reaction tower is filled with catalyst, and as the catalyst is filled, the catalyst discharger is sequentially pulled up together with the gondola to fill the reaction tower with a predetermined amount of catalyst, This aims to achieve the above objective.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

An embodiment of the present invention is shown in FIGS. 1-3. In FIG. 1, a gondola 5 is suspended from a winch 3 equipped with a filling controller 2 via a wire 4 at the central axis of a large-volume cylindrical reaction column 1. An air motor 6 whose rotation speed can be adjusted is attached to the lower end of the gondola 5, and a conical catalyst distributor 7 and a shallow dish-shaped member 8 are coaxially connected to the motor 6, and the rotation axis is the same as that described above. The air motor 6, the catalyst distributor 7, and the shallow dish-like member 8 constitute a catalyst ejector 9, which is connected in parallel to the central axis.

Granular catalyst 30 packed into the reaction tower 1
is stored in a hopper 10 at the top outside the column, and is sent from this hopper 10 via a delivery pipe 11 to an inlet 13 of a charging chute 12 as a catalyst replenishing device, and an outlet 14 at the bottom of the charging chute 12. reaches the top of the gondola 5 and is fixed to the gondola 5, and furthermore, the guide hole 5 formed in the gondola 5
The catalyst distributor 7 is connected to the upper part of the catalyst distributor 7 through the opening.

The catalyst distributor 7 is configured to reduce the speed of the catalyst 30 received from the opening of the guide hole 51 so that it can be distributed almost evenly onto the shallow dish-shaped member 8.
A shutter (not shown) is attached to the guide hole 51, and is opened and closed by an external switch (not shown).

The filling chute 12, as shown in FIG. The fastener 15 is closed inside the reaction tower 1, and the slider 17 of the fastener 15 is closed on the outside of the reaction tower 1 by a slider opening/closing tool (not shown) provided above the reaction tower 1 as the flexible band 16 is raised. When actuated, the fastener 15 is opened, and the separated flexible bands 16, 16, etc. are individually wound onto drums 18, 18, etc., respectively. At this time, as the flexible band 16 descends, the fastener 1 is moved by the slider opening/closing tool.
5 is automatically closed.

A level sensor 2 is installed on the side of the gondola 5.
1 is attached, and this sensor 21 detects the height of the gondola 5 and thus the shallow dish-shaped member 8 from the surface of the catalyst 30 packed in the reaction column 1, and this detection signal is sent to the filling controller 2. The winch 3 is driven and controlled based on this signal.

At the bottom near the open end of the lower part of the reaction tower 1,
A ball-shaped coarse granular material 22 for fluid rectification and catalyst support is laid down, and the catalyst 30 is spread and filled onto this coarse granular material 22.

The catalyst distributor 7 and the shallow dish 8 of the catalyst emitter 9 are shown enlarged in a perspective half-section in FIG. That is, the catalyst distributor 7 is a truncated conical cylinder 7
1. This conical cylinder 71 is connected to the rotating shaft 23 and is composed of a plurality of spirally inclined ribs 72, etc., and a shallow dish-shaped member 8 attached to the lower end of the rotating shaft 23 has a plurality of The structure includes, for example, six standing plate-shaped wears 25 and a plurality of, for example, six slits 26 between each of these wears 25.

Next, the catalyst filling operation of this example will be explained.

First, the gondola 5 is installed at the upper entrance of the reaction tower 1.
The wire 4 of the winch 3 is driven in the payout direction to lower the gondola 5, and in synchronization with this, the drums 18, 18, etc. are also driven in the payout direction to lower the flexible bands 16, 16, etc. When the slider 18 is lowered, the slider 18 is operated by the slider opening/closing tool, the fasteners 15, 15, etc. are successively closed, and the filling chute 12 is created. Simultaneously with this lowering of the chute 12, the exit door (not shown) of the hopper 10 is opened, and the catalyst 30 is slowly filled into the filling chute 12. At this time, the shutter of the guide hole 51 communicating with the outlet 14 at the lower part of the filling chute 12 remains closed.

When the gondola 5 reaches a predetermined height above the coarse particle material 22, for example, 1 m or less while the chute 12 is filled with the catalyst 30 in this way, the sensor 21 detects this and fills the chute 12 with the catalyst 30. When the signal is transmitted to the controller 2, the descent of the gondola 5, chute 12, etc. is stopped, and thereafter, the operation of charging the catalyst 30 into the reaction column 1 is performed under the control of the controller 2.

That is, the motor 6 is rotated to rotate the catalyst distributor 7 and the shallow dish-shaped member 8 at a predetermined speed, and
The shutter of the guide hole 51 is opened and the filling chute 1 is opened.
The catalyst 30 is poured into the catalyst distributor 7 from the outlet 2, and the flow rate and outflow direction of the catalyst 30 are adjusted so that the catalyst 30 is almost uniformly dropped onto the shallow dish-shaped member 8 below. This catalyst 30 is evenly distributed inside the reaction tower 1 by the action of the slit 26 of the shallow dish-shaped member 8 and the wear 25. That is, the shapes of the slit 26 and the wear 25 are determined so that the distance between the surface of the catalyst 30 and the shallow dish-shaped member 8 is maintained within a predetermined range, the rotational speed of the rotation, the delivery amount of the catalyst 30, and the catalyst 30. The slit 26 ensures a moderate downward drop, the wear 25 promotes centrifugal discharge due to centrifugal force, and ensures uniform dispersion from the periphery of the shallow dish-shaped member 8. The two work together to ensure uniform dispersion. At this time, the shapes of the wear 25 and the slits 26 are determined through careful experiments in advance. Further, the rotation speed of the air motor 6 of the catalyst discharger 9 is set to an appropriate value depending on the type and particle size of the catalyst.

When the level of the catalyst 30 rises due to filling and the difference in height between the surface of the filled catalyst 30 and the shallow dish-shaped member 8 becomes a predetermined value, for example 30 cm or less, this is detected by the level sensor 21 and the winch is activated. 3 and the drums 18, 18, etc. are hoisted up by a predetermined amount and stopped when the difference in height becomes approximately 1 m.

Thereafter, this operation is continued until the shallow dish-shaped member 8 rises and reaches the set height of the upper opening of the reaction tower 1, and a predetermined amount of catalyst 30 is filled into the reaction tower 1. The work is completed.

According to this embodiment as described above, the catalyst 30 can be filled into the reaction tower 1 smoothly and quickly without bothering the workers, and the work efficiency can be improved. Also,
The filling is done gently to prevent powdering.
The performance of the catalyst 30 does not deteriorate. Furthermore, the packing density can be kept constant and the bulk density can be increased,
In addition, since this filling state does not change even if the reaction towers 1 are different, a pressure difference between the processing fluids in the parallel reaction towers 1 does not occur.

In addition, in implementation, the level sensor 21, the filling controller 2, etc. may be simplified or omitted and the control may be left to an operator outside the reaction tower, and the catalyst distributor 7 may also have a different shape or may be completely omitted. It may not be provided. The same applies to catalyst replenishment devices such as the filling chute 12; for example, the number of fasteners 15 of the chute 12, and therefore the number of flexible strips 16, etc., may be changed, for example, by setting them to one piece. It may also be configured such that it is wound onto a single drum 18. In addition, as shown in FIG.
It is also possible to use a flexible tube 27 without a fastener instead of the hopper 2, and to have a configuration in which the hopper 10 and the hopper 10 are moved up and down. At this time, if the catalyst 30 in the hopper 10 can be forcibly transferred by an appropriate fluid pressure feeding device, the hopper 10 does not necessarily need to be raised or lowered, and may be fixed at a fixed position. Furthermore, the gondola 5 can be simplified to a simple hanging fitting, and the motor 6 can also be an electric motor,
Other power sources such as a hydraulic motor can be used instead.

[Effects of the Invention] The method and apparatus of the present invention as described above allows the granular catalyst to be packed in a reaction tower at a uniform density without requiring any troublesome work by the operator, without causing pulverization. It has the effect of making it possible.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing a schematic configuration of an embodiment of a catalyst filling device according to the present invention, FIG. 2 is a perspective view of a filling chute used in the embodiment of FIG. 1, and FIG. 3 is a similar view. FIG. 4 is a longitudinal sectional perspective view of the catalyst ejector, and a front sectional view showing essential parts of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Reaction tower, 5... Gondola, 6... Motor, 7... Catalyst distributor, 8... Shallow dish-shaped member, 9...
...Catalyst discharger, 10...Hopper, 12...Charging chute as a catalyst replenishing device, 25...Ware, 26...Slit, 30...Catalyst.

Claims (1)

[Scope of Claims] 1. A catalyst releaser capable of releasing the catalyst downward and toward the radial periphery is suspended in the reaction tower so as to be able to rise and fall, and the catalyst releaser and the catalyst filled in the reaction tower are A catalyst filling method comprising sequentially filling a reaction tower with catalyst while raising a catalyst discharger so that the distance from the surface of the catalyst falls within a predetermined distance range. 2. In a catalyst filling device for filling a cylindrical reaction tower with a granular catalyst, a gondola that can be raised and lowered is inserted from outside the upper part of the reaction tower along the axis of the cylindrical reaction tower. The gondola is suspended within and carries a catalyst ejector capable of discharging catalyst downwardly and toward the radial periphery, and a hopper is connected to the catalyst ejector and placed outside the reaction column. A catalyst replenishment device is provided which is connected to the hopper and supplies the catalyst in the hopper to a catalyst discharger, and the catalyst discharger includes a motor and a shallow dish-shaped member rotationally driven by the motor. 1. A catalyst filling device comprising upright plate-shaped wears provided at predetermined intervals and slits provided between these wears. 3. The catalyst filling device according to claim 2, wherein the rotation speed of the catalyst discharger can be controlled depending on the type and particle size of the catalyst.