JPS6118430A - Catalyst filling method and catalyst filling device - Google Patents

Abstract

PURPOSE:To pack a catalyst to the inside of a reaction tower in uniform density by packing successively the catalyst to the inside of the reation tower while ascending the level of the discharged catalyst so that the distance between the level of the discharged catalyst and the surface of catalyst packed in the reaction tower is regulated to the range of prescribed distance. CONSTITUTION:When the level of a catalyst 30 is ascended by the packing and the variance of height between the surface of the packed catalyst 30 and a shallow pan-shaped member 8 is reached to the prescribed value, for example, to <=30cm, the variance is detected with a level sensor 21 and a winch 3 plus the drums 18, 18 are wound up by the prescribed amount and stopped when the above-mentioned variances of height is reached to about 1m. This operation is continued till the shallow pan-shaped member 8 is ascended to reach the preset height of the upper aperture part of the reaction tower 1 and the packing of the prescribed quantity of the catalyst 30 to the inside of the reaction tower is performed to finish the packing operation. By this method, the catalyst 30 can be packed inside of the reaction tower 1 smoothly and quickly and thereby the operation efficiency is increased.

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 Art and Problems] Conventionally, a large-capacity cylindrical reaction tower is filled with granular catalyst by guiding the catalyst 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. When the level of the packed bed rises during this filling operation and the work becomes difficult, we stop the work, remove the middle pipe of the filling pipe, shorten it, restart the work, and repeat this process. was.

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 a cloud of 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 if they fall naturally from a height of 1 meter or more, they break down into powder, reducing the catalyst's function and increasing uneven filling. There is something. 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 the emergence of a device that solves 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 j The method of the present invention is such that a catalyst releaser capable of releasing the catalyst almost uniformly into the reaction tower is suspended in a vertically movable manner within the reaction tower, and this catalyst releaser and the catalyst packed in the reaction tower are 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 outside the reaction tower is suspended inside the reaction tower along the central ring of the reaction, and the gondola is equipped with a catalyst that is placed downwardly and toward the radial periphery. A catalyst discharger that can be discharged is mounted, and 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 discharger into the reaction tower, and the catalyst is sequentially filled into the reaction tower, 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. , which aims to achieve the above objective.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1-3. In FIG. 1, a wire 4 is connected to the center shaft of a large-volume cylindrical reaction column 1 from a winch 3 equipped with a filling controller 2.
A gondola 5 is suspended via the. An air motor 6 whose rotation speed can be adjusted is attached to the lower end of the gondola 5, and this motor 6 has a conical catalyst distributor 7 and a shallow dish-shaped member 8 mounted on the same wheel, and has one rotation axis as above. The air motor 6, the catalyst distributor 7, and the shallow dish-shaped member 8 constitute a catalyst ejector 9.

The granular catalyst 30 packed into the reaction tower 1 is stored in a hopper 10 in the upper part of the enclosure, and is passed from this hopper IO through a delivery pipe ti to the inlet 13 of a charging chute 12 as a catalyst replenishing device. The outlet 114 at the bottom of the filling chute 12 reaches the top of the gondola 5 and is fixed to the gondola 5, and then passes through the guide hole 51 formed in the gondola 5 to the top of the catalyst distributor 7. Closely connected through an opening.

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

The filling chute 12, as shown in FIG.
It is composed of, for example, four flexible bands 16, 16, etc., which are connected in a cylindrical shape with fasteners 15, 15, etc., and the fastener 15 is closed inside the reaction column 1 below the chute 12, and the outside of the reaction column 1 is closed. In this case, the slider 17 of the fastener 15 is connected to the reaction column l.
A slider opening/closing device (not shown) provided above is operated as the flexible band 16 rises to open the fastener 15, and the separated flexible band 16, 16, etc. are placed on the drum 18 for each bond. It is designed to be wound up into .18 grade. At this time, the fastener 15 is automatically closed by the slider opening/closing tool as the flexible band 16 is lowered.

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

A pole-shaped coarse granular material 22 for fluid rectification and catalyst support is laid at the bottom near the open end of the lower part of the reaction column 1, and the catalyst 30 is sprinkled on this coarse granular material 22.
It is ready to be filled.

The catalyst distributor 7 and shallow dish-shaped member 8 of the catalyst releaser 9 are as follows:
FIG. 3 shows an enlarged half-section perspective view. That is,
The catalyst distributor 7 is composed of a truncated conical cylinder 71, a plurality of spirally inclined lips 72 connecting the conical cylinder 71 to the rotating shaft 23, and is attached to the lower end of the rotating shaft 23. The shallow dish-like member 8 has a structure in which a plurality of, for example, six, standing plate-shaped wears 25 are provided, and a plurality of, for example, six slits 26 are provided between each of these wears 25. .

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

First, the gondola 5 is hung at the upper entrance of the reaction tower 1,
While driving the wire 4 of the winch 3 in the payout direction to lower the gondola 5, the drum 18.1 is moved in synchronization with this.
8, etc. in the same direction as the flexible band 16,
16, etc. are lowered, the slider 18 is actuated by the slider opening/closing tool, and the fasteners 15, 15, etc. are successively closed to form the filling chute 12. Simultaneously with this lowering of the chute 12, the outlet door (not shown) of the hopper 10 is opened and the catalyst 30 is gently placed inside the filling shoe 12.
is being filled. 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 being filled with the catalyst 30 in this way, the sensor 2 detects this and controls the filling. When the signal is transmitted to the reactor 2, the descent of the gondola 5, chute 12, etc. is stopped, and thereafter, the operation of charging the catalyst 30 into the reaction tower 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-like member 8 at a predetermined speed, and the shutter of the guide hole 51 is opened to allow the catalyst 30 to flow from the outlet of the filling chute 12.
The catalyst 30 is poured into the catalyst distributor 7, and the flow rate and outflow direction of the catalyst 30 are adjusted to allow the catalyst 30 to fall approximately evenly 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 slit 26,
The shape of the wear 25 ensures even distribution of the catalyst 30 as well as the rotational speed and the delivery amount of the catalyst 30. The slits 26 moderate the downward fall, and the wear 25 ensures that the catalyst 30 is not evenly distributed due to the centrifugal force. It promotes centrifugal discharge and allows uniform dispersion from the periphery of the shallow dish-shaped member 8, and the two work together to achieve uniform dispersion. At this time, the shapes of the wear 25 and the slits 26 are determined through careful experiments in advance. Further, the rotational speed of the 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 height difference 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, the level sensor 21
The winch 3, drum 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-like member 8 rises and reaches the set height of the upper opening of the reaction tower l.
The filling operation is completed after a predetermined amount of catalyst 30 is filled into the inside.

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 working efficiency can be improved. Also.

The filling is also carried out gently to prevent powdering, and the catalyst 3
0 performance degradation does not occur. Furthermore, since the packing density is kept constant and the bulk density can be increased, and this packing condition does not change even if the reaction towers 1 are different, differential pressures of the processing fluid in the parallel reaction towers 1 do not occur. There is no.

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. Filling chute 12
The same applies to catalyst replenishment devices such as 1 (for example shoes) 12 fasteners (15), and therefore flexible strips 1
The number 6 or the like may be changed, for example, so that they are wound one by one onto a single drum 18.

Further, as shown in FIG. 4, the chute 12 may be replaced by a flexible tube 27 without a fastener, and the hopper 10 and the hopper 10 may be raised and lowered. At this time, if the catalyst 30 in the hopper 10 can be forcibly transferred using an appropriate fluid pressure feeding device, the hopper 10 does not necessarily have to be raised or lowered and may be fixed at a fixed position.

The gondola 5 can be simplified to a simple hanging metal fitting, and the motor 6 can also be replaced with another power source such as an electric motor or a hydraulic motor.

[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 column at a uniform density in a gentle manner without causing pulverization, without relying on laborious work by the operator. It has the effect of making it possible.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing a schematic configuration of an embodiment of a catalyst filling device according to the present invention, and FIG. 2 is a view of the structure of FIG. 1. FIG. 3 is a perspective view of a filling chute used in the embodiment, FIG. 3 is a vertical perspective view of the catalyst discharger, and FIG. 4 is a front sectional view showing the main parts of another embodiment of the present invention. 1... Reaction tower, 5... Gondola, 6... Motor,
7... Catalyst distributor, 8-... Shallow dish-shaped member, 9... Catalyst discharger, 10... Fastener, 12... Filling chute as catalyst replenishing device, 25... Ware, 26・
...Slit, 30...Catalyst.

Claims (4)

[Claims] (1) A catalyst releaser capable of releasing the catalyst almost uniformly into the reaction tower is suspended in the reaction tower so as to be able to rise and fall, and the catalyst releaser is connected to the surface of the catalyst packed in the reaction tower. A catalyst filling method characterized by sequentially filling a reaction tower with catalyst while raising a catalyst discharger so that the distance is approximately within a predetermined distance range. (2) In a catalyst filling device for filling a cylindrical reaction tower with granular catalyst, a gondola that can be raised and lowered is run from outside the upper part of the reaction tower along the ring of the cylindrical reaction tower. Suspended within the reaction column, the gondola carries a catalyst ejector capable of ejecting catalyst downwardly and toward the radial periphery, communicated with the catalyst ejector and placed outside the reaction column. 1. A catalyst filling device comprising a catalyst replenishing device that communicates with a hopper and supplies the catalyst in the hopper to a catalyst discharger. (3) In claim 2, the catalyst ejector includes a motor and a shallow dish-like member rotationally driven by the motor, and the shallow dish-like member is arranged in vertical positions at predetermined intervals. A catalyst filling device comprising raised plate-shaped wear and a slit provided between the wear. (4) 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.