JP2941151B2 - Catalyst filling method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst filling method and a catalyst filling device, and is used when a granular catalyst is charged into a reaction tower used in a petrochemical plant or the like.

[0002]

2. Description of the Related Art A reaction tower used in a petrochemical plant or the like is filled with an appropriate catalyst as necessary to promote the reaction of a reaction solution. The catalyst is usually granulated in order to enhance the contact property with the reaction solution, and is uniformly packed in the reaction tower at a predetermined density. Conventionally, when charging the catalyst, a hose to which the catalyst is supplied from an external hopper is introduced through the upper opening of the reaction tower, and an operator in the tower operates the hose appropriately to spray the catalyst and level the surface. Was working. However, in such a conventional method, since the worker enters the reaction tower and performs the work manually, the work efficiency is low, and
There were inconveniences such as the solidification of the catalyst by the operator and the unevenness of the packing density of the catalyst.

[0003] In order to solve such inconveniences, the present applicant has developed a filling method using a rotary spray type catalyst discharger (see Japanese Patent Publication No. 1-28070).
In this filling method, a catalyst discharger for rotating and spraying a catalyst from a lower rotary discharge plate is hung from the upper opening of the reaction tower, and the hanging height of the catalyst discharger and the rotation speed of the discharge plate are appropriately controlled. Thus, the catalyst is sprayed in multiple concentric circles from the central portion to the peripheral portion in the reaction tower, whereby it is possible to easily secure appropriate and uniform spray density and surface flatness.

[0004]

Incidentally, in the above-described catalyst filling by rotary spraying, a catalyst to be sprayed by a catalyst discharger is supplied by a hose, and this hose is a hose winding mechanism installed outside the reaction tower. Drawn from
It can be adjusted to the required length. However, in the conventional hose winding mechanism, it is necessary to pull out or wind up the hose according to the amount of movement of the catalyst ejector every time the catalyst ejector is moved up and down during the spraying of the catalyst.

[0005] For this reason, the operation of the hose winding mechanism is frequently required, and the length of the hose must be adjusted in accordance with the amount of elevation of the catalyst discharger, so that complicated control is inevitable. In addition, if the hose length adjustment in the hose winding mechanism is not appropriate, there is a problem that a slack occurs in the middle of the hose reaching the catalyst discharger, and the slack may hinder the supply of the catalyst. SUMMARY OF THE INVENTION An object of the present invention is to provide a catalyst filling method and a catalyst filling device capable of easily and reliably pulling out or winding up a hose for supplying a catalyst to a suspended catalyst discharger.

[0006]

SUMMARY OF THE INVENTION The present invention provides a hose winding mechanism in which a predetermined winding force is always applied to a hose reaching a catalyst discharger, so that the hose can be pulled out and wound by raising and lowering the catalyst discharger. This is performed automatically to prevent the intermediate portion from being loosened and to reduce the complexity of the control. That is, in the catalyst filling method of the present invention, a catalyst discharger to which a hose drawn from a hose winding mechanism outside the reaction tower is connected is suspended from an upper opening of the reaction tower, and a catalyst supplied from the hose is discharged from the hose. While spraying, the hose hoisting mechanism always generates a hoisting force smaller than the weight of the catalyst ejector during the spraying operation, and when the catalyst ejector rises, the hose hoisting force is applied by the hoisting force. The hose is wound around a winding mechanism, and when the catalyst ejector is lowered, the hose is pulled out of the hose winding mechanism against the winding force by the weight of the catalyst ejector.

On the other hand, a catalyst filling device of the present invention comprises a catalyst discharger suspended from an upper opening of a reaction tower to spray a catalyst into the reaction tower, and a catalyst discharger from outside the reaction tower through the upper opening. And a hose winding mechanism capable of winding the hose and having a winding force smaller than the weight of the catalyst discharger and capable of operating in the reverse direction against the winding force even in a winding operation state. It is characterized by. Further, in the catalyst filling device, the hose winding mechanism is driven by an air motor.

[0008]

According to the present invention, a predetermined winding force is always applied to the hose reaching the catalyst discharger by the hose winding mechanism so that the hose reaches the middle of the hose reaching the catalyst discharger from the hose winding mechanism. Looseness or the like occurring in the portion is eliminated. In addition, by setting the hoisting force of the hose hoisting mechanism to be smaller than the weight of the catalyst ejector, when the catalyst ejector rises, the hose is automatically wound up by an extra length and when the catalyst ejector descends. The hose is automatically withdrawn according to the weight of the catalyst discharger.
This eliminates the need to pull out and wind up the hose every time the catalyst ejector is moved up and down, eliminates the need to adjust the hose length according to the elevation of the catalyst ejector, and reduces the hose The slack will also be eliminated.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a reaction tower 10 is a large-sized cylindrical reaction tower having a bottom filled with a catalyst 11. An opening 12 is provided at the center of the upper surface, and the bottom is fixedly supported by a foundation 13. . At the top of the reaction tower 10, a gantry 14 is assembled.
Inside 14 is a catalyst filling device 20 according to the present invention.

The catalyst filling device 20 is suspended and introduced into the reaction tower 10 to rotate and disperse the catalyst, and a chain 41 suspending the catalyst discharger 30 is lifted to raise and lower the catalyst discharger 30. The system includes a chain hoisting mechanism 40 for feeding, a hopper mechanism 50 for supplying a catalyst to be sprayed, and a hose hoisting mechanism 60 for winding up a hose 61 for supplying the catalyst from the hopper mechanism 50 to the catalyst discharger 30. Further, the catalyst filling device 20 performs overall operation control based on outputs from various sensors and various settings including a wire-shaped level meter 71 for detecting the surface height of the catalyst 11 filled in the reaction tower 10. Control means 70 is provided.

As shown in FIGS. 2 and 3, the catalyst discharger 30 has a discharge plate 31 at the lower portion for discharging the catalyst while rotating, and a motor 32 and a shaft 33 for driving the discharge plate 31 to rotate therein. Have. Further, the catalyst discharger 30 is provided with a catalyst passage 34 for feeding the catalyst supplied from the hose 61 to the discharge plate 31.
And three holding arms 35 extending radially as holding means for holding the catalyst discharger 30 at the center of the reaction tower 10 on the outer periphery.

The discharge plate 31 is rotatably driven by a motor 32 and a shaft 33, and discharges the catalyst supplied from the catalyst passage 34 at a number of different radial positions, thereby dispersing the catalyst in multiple concentric circles. As a specific structure of the discharge plate 31, for example, a structure in which a large number of catalyst passages having different radial lengths are stacked in layers as disclosed in Japanese Patent Application No. 63-165577 by the present applicant is preferable. The catalyst passage 34 is divided into three portions at an intermediate portion so as to avoid the motor 32 and the shaft 33, and each of the portions is joined again at the lower portion to supply the catalyst to the central portion of the discharge plate 31.

The holding arm 35 is a pantograph-type telescopic mechanism in which a plurality of parallel links are continuous, and is arranged at three positions on the outer periphery of the catalyst discharger 30 at equal intervals. Each holding arm 35 is expanded and contracted in synchronization with each other using an air cylinder 83 controlled by the control means 70 as a drive source, and is stored in a storage section 36 formed between three intermediate portions of the catalyst passage 34 when contracted. In addition, at the time of extension, the upper and lower rollers 85 of the tip member 84 abut against the inner surface of the reaction tower 10, thereby holding the catalyst discharger 30 at the center position of the reaction tower 10. The roller 85 can freely roll up and down on the inner surface of the reaction tower 10, and the catalyst discharger 30 can freely move up and down even while being held by the holding arm 35.

The hose winding mechanism 60 is shown in FIGS.
As shown in the figure, the pair of belt members 62 are
A pair of reels for individually winding each belt member 62 by using a pipe-shaped hose 61 joined by
64, a pair of air motors 65 for rotating each reel 64 under the control of the control means 70, and a pipe extending from the hopper mechanism 50 for guiding the belt member 62 drawn from each reel 64.
The belt member 62 includes a pair of rollers 66 along the pipe 51, and a joining member 67 that joins or separates the fasteners 63 on both sides facing each other while the belt members 62 are curved along the pipe 51.

The belt member 62 is an antistatic conveyor belt or the like, and the fastener 63 is an existing one made of plastic or the like. The joining member 67 is equivalent to a normal fastener `` pick '', is fixed to the gantry 14, and the fastener 66 is joined when passing the joining member 67 downward, and is extended downward as the hose 61. The belt is separated when passing upward, and is wound up on a reel 64 as a belt member 62. The air motor 65 is an existing device that generates a rotational force by compressed air supplied from the outside, and can maintain a predetermined rotational driving force by continuously supplying a predetermined compressed air under the control of the control unit 70. Even when the driving force is maintained, it can rotate in the opposite direction when the load increases.

In this embodiment, the catalyst is sprayed into the reaction tower 10 in the following procedure. First, the catalyst discharger 30 is suspended above the upper opening 12 of the reaction tower 10 by the chain 41 from the chain hoisting mechanism 40 installed on the gantry 14 in a state where the holding arm 35 is stored in the storage section 36, The hose 61 pulled out from the hose winding mechanism 60 is passed through the catalyst passage.
Connect to the top of 34. Then, the air motor 65 is operated in accordance with a command from the control means 70 to generate a driving force in the direction of winding the belt member 62 around the reel 64, and an upward pulling force is applied to the hose 61. At this time, the driving force of the air motor 65 is adjusted so that the tension generated in the hose 61 is smaller than the weight of the catalyst discharger 30, and the belt member 62 can be wound around the reel 64 when the hose 61 is freely movable. However, if the weight of the catalyst discharger 30 is hung on the hose 61, the hose 61 is set so as to be pulled down.

Next, the chain hoisting mechanism 40 is operated in accordance with a command from the control means 70, and the chain 41 is extended so that the catalyst discharger
30 is lowered and introduced into the reaction tower 10 through the upper opening 12.
When the catalyst ejector 30 is lowered, the weight of the catalyst ejector 30 is suspended by the hose 61, and the hose 61 is pulled downward, and the belt member 62 is pulled out from the reel 64 against the driving force of the air motor 65. Thereby, the hose 61 corresponding to the height of the catalyst discharger 30
Withdrawal is done automatically.

When the catalyst discharger 30 reaches the vicinity of the bottom in the reaction tower 10, the control means 70 simultaneously extends the three holding arms 35 by the air cylinder 83, and holds the catalyst discharger 30 at the center of the reaction tower 10. I do. Then, the discharge plate 31 is rotated at a predetermined rotation speed by the motor 32, and the catalyst supplied from the hopper mechanism 50 via the catalyst passage 34 and the hose 61 is dispersed in the reaction tower 10 in multiple concentric circles. The control means 70 appropriately adjusts the height of the catalyst discharger 30, the rotation speed of the discharge plate 31, and the amount of released catalyst so that the density of the catalyst 11 filled in the reaction tower 10 is uniform and the surface becomes flat. I do.

For example, as the spraying proceeds, the catalyst 11 in the reaction tower 10
When the surface position of the catalyst rises, the control means 70 calculates the height of the catalyst discharger 30 from the length of the chain 41 pulled out of the chain winding mechanism 40, and detects the surface height of the catalyst 11 in the reaction tower 10 by the level meter 71. And the catalyst discharger 30 from each of the surfaces of the catalyst 11
Calculate the relative height up to. If the relative height exceeds the predetermined height range, the control means 70 operates the chain winding mechanism 40 to raise the catalyst discharger 30 by a predetermined amount, and the relative height from the surface of the catalyst 11 to the catalyst discharger 30. Is adjusted to fall within a predetermined range.

As the catalyst discharger 30 rises, the required length of the hose 61 becomes shorter, and if the length is unchanged, the hose 61 will be loosened halfway. However, since the hose 61 is provided with a driving force in the winding direction from the air motor 65 to the reel 64 that winds the belt member 62, if the hose 61 is slightly loosened, the slack belt member 62 is wound up. Thereby, the hose 61 corresponding to the height of the catalyst discharger 30
Is automatically wound up.

The above-described spraying of the catalyst and the raising of the catalyst discharger 30 are repeated, and when the catalyst discharger 30 reaches a predetermined height in the reaction tower 10, the reaction tower 10 is filled with a sufficient amount of the catalyst 11. Therefore, the control means 70 stops the spraying of the catalyst by the catalyst ejector 30, and contracts and holds the holding arm 35. Then, the catalyst discharger 30 is pulled up from the reaction tower 10, and the hose 61 is automatically wound up by the hose winding-up mechanism 60, and then the driving force of the air motor 65 is stopped and the hose 61 is pulled out of the catalyst discharger 30. After removal, the catalyst discharger 30 and the like are collected, and the catalyst filling device 20 is disassembled and removed from the reaction tower 10.

According to this embodiment, the following effects can be obtained. That is, the hose is
By applying the desired tension to 61, the hose 61 can be prevented from becoming loose, etc., and the hose 61 can be automatically pulled out and taken up as the catalyst discharger 30 moves up and down. it can. Therefore, it is not necessary to operate the hose winding-up mechanism 60 by the control of the control means 70 or the like every time the catalyst discharger 30 is moved up and down as in the related art. Can also be achieved. In addition, since the length of the hose 61 is set to follow by the raising / lowering operation itself of the catalyst discharger 30, the hose 61 can be automatically adjusted to an appropriate length according to the raising / lowering height of the catalyst discharger 30. And control can be made simpler and more reliable.

On the other hand, the tension is applied to the hose 61 by an air motor.
Since it is performed in step 65, the structure is simple and the reverse rotation is easy and reliable even when the rotational driving force is applied. Even when the rotational driving force is applied, the supply of the compressed air may be maintained, and there is no problem such as heat generation as in the electromagnetic motor. Further, since the tension is applied to the hose 61 at the reel 64, it can be shared with a drive source for winding the hose 61, which simplifies the device configuration, and also applies the tension in the middle of the hose 61. As a result, prevention of loosening can be ensured.

In the above embodiment, since the hose 61 is constituted by the pair of belt members 62, the hose 61 can be easily wound around the reel 64, and the required performance as the hose 61 can be obtained by joining the hose 63 with the fastener 63 in a pipe shape. Can be sufficiently satisfied. Then, the reels 64 of the respective belt members 62 are individually driven by the air motor 65, so that the integrated hose 61 is formed.
In addition to the portions, the separated belt portions 62 can also be individually prevented from loosening and automatically expanding and contracting, so that inconvenience such as loosening of one belt member 62 can be reliably prevented.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but includes the following modifications and the like. That is, the hose 61 may be formed by joining three or more belt members 62 with the fastener 63, and the belt member 62 may be made of any material as long as it is suitable for supplying the catalyst. Any material and type can be selected as long as it is easy to join and separate. Further, as the hose 61, a normal hose having a tubular shape in advance may be used. In this case, the hose may be wound around the reel 64 so that the hose cross section is flat. Further, instead of drawing and winding up a flexible hose, a rigid metal or plastic pipe may be moved up and down, and a plurality of such pipes may be used to extend and contract telescopically.

In the hose winding mechanism 60, the reels 64, the roller groups 66, and the joining members 67 may be provided by the number of belt members 62 (or by the number of hoses 61 when not joined). At this time, the motor 65 may be provided on each of the reels 64, or each reel 64 may be collectively driven by one motor. However, each reel 64
It is desirable to take measures such as absorbing the difference between the hoisting operations.

Further, the drive source for winding and driving the reel 64 is not limited to the air motor 65 but may be an electromagnetic motor or the like, or may be a linear motor or the like that generates a linear driving force. Further, a gravity may be generated by hanging a weight on a wire drawn from another reel coaxial with the reel 64. In short, the drive source of the hose winding mechanism 60 may be any structure that can generate a predetermined drive force and can operate in the direction opposite to the direction of the drive force even when the drive force is generated. In this regard, compared to an electromagnetic motor in which heat is inevitable due to the generation of driving force,
An air motor that only requires the drive air to flow out as in the above embodiment is preferable.

The winding drive of the hose 61 is performed by a reel.
Not only the rotary drive of 64 but also the middle part of the hose 61
It may be driven in the direction. However, in order to prevent the occurrence of loosening, the vicinity of the reel 64 may be driven, or the driving of the reel 64 and the driving of the intermediate portion of the hose 61 may be combined, and a driving mechanism is arranged at a predetermined interval in the middle of the hose 61. You may make it.

The other parts of the catalyst filling device 20, namely, the catalyst discharger 30, the chain hoisting mechanism 40, the hopper mechanism 50,
The configuration of the control means 70 and the like may be appropriately selected at the time of implementation.
For example, the control means 70 may use an existing computer system or the like, and may be appropriately set so as to perform the above-described control. Further, the catalyst discharger 30 is not limited to the one having the holding arm 35, and the shape of the discharge plate 31 and the catalyst passage 34 may be arbitrarily selected.

[0030]

As described above, according to the present invention,
By constantly applying a predetermined winding force to the hose reaching the catalyst discharger in the hose winding mechanism, the hose can be automatically pulled out and wound as the catalyst discharger moves up and down. In addition, it is possible to eliminate the operation adjustment every time the catalyst discharger is moved up and down, and to prevent the middle portion of the hose from being loosened, whereby the hose can be pulled out and wound up reliably and easily.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing the entire configuration of an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the catalyst discharger of the embodiment.

FIG. 3 is a cross-sectional view showing the catalyst discharger of the embodiment.

FIG. 4 is a front vertical sectional view showing the hose winding mechanism of the embodiment.

FIG. 5 is a side longitudinal sectional view showing the hose winding mechanism of the embodiment.

[Explanation of symbols]

 10 Reaction tower 11 Catalyst 20 Catalyst filling device 30 Catalyst discharger 40 Chain hoisting mechanism 50 Hopper mechanism 60 Hose hoisting mechanism 61 Hose 64 Reel 65 Air motor 70 Control means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01J 8/02 B01J 4/00-4/04 B65G 65/30-65/48 B66D 1/60

Claims (3)

(57) [Claims] 1. A catalyst discharger connected to a hose drawn out of a hose winding mechanism outside a reaction tower is hung from an upper opening of the reaction tower, and a catalyst supplied from the hose is supplied to the reaction tower by the catalyst discharger. During the spraying operation, the hose hoisting mechanism always generates a hoisting force smaller than the weight of the catalyst ejector. And loading the hose from the hose winding mechanism against the winding force by the weight of the catalyst ejector when the catalyst ejector is lowered. 2. A catalyst discharger suspended from an upper opening of the reaction tower and spraying a catalyst into the reaction tower, a hose connected to the catalyst discharger through the upper opening from outside the reaction tower, A catalyst hoisting mechanism capable of hoisting the hose and having a hoisting force smaller than the weight of the catalyst discharger and capable of operating in the reverse direction against the hoisting force even in a hoisting operation state; 3. The catalyst filling device according to claim 2, wherein the hose winding-up mechanism is driven by an air motor.