JPH0760102A - Method for packing catalyst and device therefor - Google Patents

Abstract

PURPOSE:To provide a catalyst packing device and a method capable of surely and easily attaining a desired packing density by using a suspended catalyst discharger. CONSTITUTION:The correlational data of the sprinkling height to obtain a desired packing density are predetermined and stored in a storage part 74. When a desired packing density is set prior to sprinkling, the corresponding sprinkling height is selected by a selection part 75 from the correlational data in the storage part 74, a catalyst discharger 30 is controlled by a regulation part 76 to attain the sprinkling height, and consequently the desired packing density of the catalyst 11 is obtained in the reaction tower.

Description

Detailed Description of the Invention

[0001]

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

[0002]

BACKGROUND ART In a reaction tower used in a petrochemical plant or the like, an appropriate catalyst is filled and used as necessary to accelerate the reaction of a reaction liquid. The catalyst is usually in the form of granules in order to enhance the contact with the reaction solution, and is uniformly packed in the reaction column at a predetermined density. In filling the catalyst, conventionally, 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 as appropriate 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 are inconveniences such as the packing density of the catalyst being non-uniform due to being compacted by the worker.

In order to solve such inconvenience, the applicant of the present invention has developed a filling method using a rotary spraying type catalyst discharger (see Japanese Patent Publication No. 1-2807).
In this filling method, a catalyst ejector for rotating and sprinkling the catalyst from the lower rotary ejection plate is hung from the upper opening of the reaction tower, and the suspension height of the catalyst ejector and the rotation speed of the ejection plate are appropriately controlled. In this way, the catalyst is sprayed in multiple concentric circles from the central part to the peripheral part in the reaction tower, whereby an appropriate and uniform spraying density and surface flatness can be easily ensured.

The packing density of the catalyst is expressed by (catalyst packing amount / packing volume), and the packing state is the "closest packing" in which the catalysts are arranged side by side in the reaction tower 10 and become the maximum density. In addition, “sock filling” is used in which the catalysts are entangled with each other in the reaction tower 10 to make the density coarse. These states are appropriately selected depending on the form of the reaction tower 10 to be filled, the properties of the reaction liquid, and the like, as well as the density value.

[0005]

By the way, in the above-mentioned catalyst filling by the rotary spraying, the scattered catalyst is controlled by controlling the height from the surface of the catalyst to the catalyst discharger to be substantially constant. Of the packing density is made uniform. However, the packing density of the catalyst is determined based on various conditions such as the type of catalyst, particle size, specific gravity, amount of spray per unit time, rotation speed of catalyst ejector, spray height of catalyst, etc. Can be easily performed by keeping each condition constant, but each condition must be appropriately set to obtain a desired packing density. Such an appropriate setting requires the experience of a skilled worker, or needs to repeat trials each time a filling operation is performed, which makes it difficult to reliably and easily obtain a desired filling density. there were.

An object of the present invention is to provide a catalyst packing method and a catalyst packing apparatus which can surely and easily obtain a desired packing density when a catalyst is dispersed in a reaction tower by using a hanging type catalyst discharger. To do.

The catalyst filling method of the present invention is a catalyst filling method of filling the catalyst in the reaction tower by spraying the catalyst from the catalyst discharger suspended in the reaction tower.
The relationship between the spraying height from the catalyst surface in the reaction tower to the catalyst discharger and the packing density of the catalyst when sprayed at the spraying height is determined in advance, and when the catalyst is sprayed, the desired packing density is obtained from the relationship. Is selected, and the height of the catalyst discharger is adjusted so as to be the selected spraying height.

The catalyst filling apparatus of the present invention is a catalyst discharger that is suspended in a reaction tower and can disperse the catalyst in the reaction tower and that can adjust the suspension height, and the height of the catalyst discharger. And a control means for controlling, and the control means stores a relationship between a spraying height from the catalyst surface in the reaction tower to the catalyst discharger and a packing density of the catalyst when sprayed at the spraying height. Storage unit, a selection unit for selecting a spraying height corresponding to the packing density designated from this storage unit, and the height of the catalyst discharger is adjusted so as to be the spraying height selected by this selection unit. And an adjusting unit. Here, as the relationship of the spraying height at which a desired packing density can be obtained, it is possible to use those which are created by actual measurement under various conditions, accumulation of empirical data of skilled persons, generalization from these, and the like.

[0009]

[Operation] In the present invention as described above, in order to previously determine the relationship of the spraying height at which the desired packing density is obtained,
From this relationship, by selecting the spraying height corresponding to the desired packing density and controlling the catalyst discharger, the desired packing density can be obtained as the spraying result. At this time, in controlling the catalyst discharger, it suffices to refer to the previously determined relationship, select a corresponding spraying height, and perform control so that the height is constantly at that height. It becomes possible to eliminate the need for experienced personnel to make empirical settings and repeat trials each time.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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-capacity bottomed cylindrical reaction tower in which a catalyst 11 is filled, an opening 12 is provided in the center of the upper surface, and the bottom is fixedly supported by a foundation 13. . A pedestal 14 is assembled on top of the reaction tower 10.
A catalyst filling device 20 according to the present invention is constructed in the inside of 14.

The catalyst charging device 20 is a catalyst releasing device 30 that is suspended and introduced into the reaction tower 10 to rotate and scatter the catalyst, and a chain 41 that suspends the catalyst releasing device 30 is rolled up to move the catalyst releasing device 30 up and down. A chain hoisting mechanism 40 is provided, a hopper mechanism 50 for supplying a catalyst to be sprayed, and a hose hoisting mechanism 60 for hoisting a hose 61 for supplying the catalyst from the hopper mechanism 50 to the catalyst discharger 30. Further, the catalyst filling device 20 controls the entire operation based on the outputs and various settings from various sensors including the wire level gauge 71 that detects the surface height of the catalyst 11 filled in the reaction tower 10. The control means 70 is provided.

The catalyst discharger 30 is for rotating and spraying the catalyst supplied from the hose 61 from a discharge plate rotating in the lower part. As the emission plate, for example, the applicant of the present invention has a Japanese Patent Application No. 63-16
A device such as the device disclosed in No. 5577, which sprays the catalyst in multiple concentric circles from a plurality of radial positions, is suitable. Further, the catalyst discharger 30 is provided with three holding arms 35 extending in the radial direction so as to hold the center thereof in the center of the reaction tower 10. Each holding arm 35 has a pantograph-type expansion / contraction mechanism, and the tip of the holding arm 35 can abut the inner surface of the reaction tower 10 and can be vertically rolled by a roller.
It is held at the center of the reaction tower 10 by the extension of 35 and can be freely moved up and down in that state.

The hose hoisting mechanism 60 uses an air motor as a driving source for hoisting the hose 61, which generates a rotational driving force by compressed air and is capable of reverse rotation even when the driving force is applied under an excessive load. During the catalyst spraying operation, 70 controls to constantly apply a hoisting driving force smaller than the weight of the catalyst discharger 30 to the hose 61. As a result, when the catalyst discharger 30 descends, the hose 61 is automatically pulled out due to its weight against the driving force of the air motor, and when the catalyst discharger 30 rises, the remaining length of the hose 61 is the driving force of the air motor. It is designed to be automatically wound up.

The control means 70 controls the catalyst discharger 30 and the chain hoisting mechanism 40 based on an externally input command, setting of filling conditions, etc., so that the reaction tower 10 of the catalyst discharger 30 can be controlled.
It is controlled so that the introduction and removal into the inside and the filling operation of the catalyst are performed in a desired state. For this,
As shown in FIG. 2, the control means 70 includes an operation unit 72 including a keyboard for inputting catalyst filling conditions and a display for performing various displays, and a catalyst discharger 30 according to the setting conditions of the operation unit 72. The discharge control unit 73 that controls the amount of the catalyst discharged from the unit, the number of revolutions at the time of discharge, and the like, and the chain hoisting mechanism 40 that controls the chain winding mechanism 40 according to the setting conditions in the operation unit 72
Storage unit 74 for adjusting the hanging height of 30, selection unit 7
5, the adjusting unit 76 is provided.

The storage unit 74 stores the correlation data as shown in FIG. 3, which shows the relationship between the catalyst spray height and the packing density. This correlation data has been measured in advance by performing a separate trial work, and shows a state in which the type of catalyst, particle size, specific gravity, spray amount per time, and rotation speed of the catalyst discharger are set to predetermined conditions. Is obtained by measuring the change in packing density when the spray height of the catalyst is changed, and stored in the form of an approximate function or data table, and the corresponding spray height can be obtained by giving an arbitrary packing density. You can get it. In the correlation data of FIG. 3, the catalyst is closest packed in the region where the spraying height is 1 m or more, and the packing density is constant without exceeding 0.65 even when the height is 1.5 m or more. On the other hand, socks are filled in a region with a height of 0.5 m or less, and the regions between each are in a state intermediate between the closest packing and the socks.

The adjusting unit 75 stores the spraying height corresponding to the designated packing density on the basis of the setting condition in the operating unit 72.
Choose from 74. The adjusting unit 76 adjusts the spraying height of the catalyst sprayed from the catalyst discharger 30 based on the spraying height selected by the selecting unit 75.
By measuring the surface height of the catalyst 11 in the reaction tower 10, the height position obtained by adding the above-mentioned spray height to this surface height is calculated as the suspension height of the catalyst discharger 30, and this suspension height is calculated. The chain winding mechanism 40 is controlled so that Incidentally, the adjusting unit 76, after the height control described above, if the increase of the surface height of the catalyst 11 in the reaction tower 10 becomes a predetermined value or more due to the progress of the spraying, the height control described above is repeated. It has become.

In the present embodiment as described above, the catalyst is dispersed in the reaction tower 10 by the following procedure. First, the catalyst releaser 30 is hung in the reaction tower 10 by the chain winding mechanism 40 with the holding arm 35 contracted, and the three holding arms 35 are extended near the bottom and held at the center of the reaction tower 10. In this state, the discharge control unit 73 operates the catalyst discharger 30 at a predetermined rotation speed and discharge amount, and the hopper mechanism via the hose 61.
The catalyst supplied from 50 is scattered in the reaction tower 10 in multiple concentric circles.

At this time, if the desired packing density is set in advance by the operation unit 72, an appropriate spray height is automatically set by the selection unit 75 and the storage unit 74, and the spray height is adjusted by the adjusting unit 76. The suspension height of the catalyst discharger 30 is adjusted so that That is, if the required packing density is 0.6,
The spray height is set to 1 m from the correlation data of. Also,
If the required packing density is 0.65, the spray height is set to 1.5 m or more. The result of these fillings is close packing. On the other hand, when sock filling is required, the spraying height is set to 0.5 m or less from the correlation data of FIG. 3, and the height is set to 0.5 m to 0 m according to the density of 0.55 to 0.5. At this time, in order to cover the reduction of the rotational spraying range due to the reduction of the spraying height, the rotation speed and the spraying amount are increased.

As the spraying proceeds, the surface position of the catalyst 11 in the reaction tower 10 rises. The adjusting unit 76 detects the surface height of the catalyst 11 by the level meter 71, and raises the catalyst discharger 30 by the chain winding mechanism 40 every time the amount of increase exceeds a predetermined amount, and the set spraying height is maintained. To control. Repeating the catalyst spraying from the predetermined height and the height adjustment of the catalyst discharger 30 as described above, and when the catalyst discharger 30 reaches the upper limit in the reaction tower 10, the spraying height is decreased by the surface rise of the catalyst 11. Correspondingly, the number of rotations of catalyst spraying is increased to secure a spraying area, and when the surface of the catalyst 11 reaches a predetermined height, the spraying work is completed.

According to the present embodiment as described above, there are the following effects. That is, if the desired packing density is set in advance, the control means 70 selects an appropriate spraying height so that the packing density is obtained, and the spraying operation is performed so as to maintain this spraying height. You can Therefore, the catalyst 11 in the reaction tower 10 can be packed at a preset desired packing density. Further, the packing state of the catalyst 11 can be set to the closest packing, the sock packing, or the middle thereof, and a desired packing result can be obtained reliably and easily.

On the other hand, in the spraying work, the operator only has to set the desired packing density, state and the like from the operating section 72, and thereafter the catalyst packing device 20 automatically processes under the control of the control means 70. Therefore, the catalyst filling work can be performed easily and surely, and the work efficiency can be improved. In particular,
Since the control means 70 selects the spraying height corresponding to the set packing density from the correlation data of FIG. 3 obtained in advance by actual measurement, an appropriate spraying height can be set reliably and promptly. Therefore, no skilled worker is required for the setting, and anyone can easily and surely perform the setting, and it is possible to prevent mistakes in judgment or operation. Further, the automatic treatment of the catalyst filling device 20 enables the spraying work to be performed rapidly at the maximum speed at which the same packing density can be obtained, and in this respect also, the work efficiency can be improved.

The present invention is not limited to the above embodiment, and the following modifications and the like are also included in the present invention. That is, the correlation data of the spraying height that gives the specified packing density is not limited to that shown in FIG. 3, but changes depending on other conditions such as the type and particle size of the catalyst, the spraying speed and the spraying amount. , Should be appropriately determined for each of the other conditions. When setting this correlation data, in addition to creating it in advance by actual measurement under various conditions, it may be created from accumulating empirical data of skilled persons according to other conditions, and by using these together or generalizing May be created.

Further, the correlation data may be recorded in the control device 70 or outside for each other condition, and the corresponding data may be selected every time the other condition is changed.
Further, as the format of the correlation data, it is possible to appropriately select one that continuously uses a data table based on variance values, one that holds as an approximation function for each interval, etc. In short, the spray height that gives the desired packing density. Should be obtained.

The correlation data is not limited to the relationship between the packing density and the spray height, but may include correspondence with some other conditions. For example, if the number of rotations required for spraying in the spraying area inside the reaction tower 10 is included for each spraying height, the number of rotations is changed in response to the catalyst 11 surface rise after the catalyst discharger 30 reaches the upper limit position. Appropriate settings can be made reliably and easily when performing with.

The other parts of the catalyst charging device 20, that is, the catalyst discharger 30, the chain winding mechanism 40, the hopper mechanism 50,
The configurations of the hose hoisting mechanism 60, the control means 70 and the like may be appropriately selected at the time of implementation. For example, the control means 70 may be an existing computer system or the like, and may be appropriately set so that the above-described control can be performed. Further, the catalyst discharger 30 is not limited to the one having the holding arm 35, and the shape of the discharge plate or the like may be arbitrarily selected.

[0026]

As described above, according to the present invention,
From the relationship of the spray height at which the desired packing density was obtained in advance, the spray height corresponding to the desired packing density was selected and the catalyst discharger was controlled to fill the inside of the reaction tower. The catalyst can have a desired packing density, and the setting operation can be performed reliably and easily.

[Brief description of drawings]

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

FIG. 2 is a block diagram showing a control means of the embodiment.

FIG. 3 is a graph showing correlation data of the above example.

[Explanation of symbols]

 10 Reaction Tower 11 Catalyst 20 Catalyst Packing Device 30 Catalyst Discharger 40 Chain Winding Mechanism 50 Hopper Mechanism 60 Hose Winding Mechanism 70 Control Means 74 Memory 75 Selector 76 Adjuster

Claims (2)

[Claims] 1. A catalyst filling method for filling a catalyst in the reaction tower by spraying the catalyst from a catalyst discharger suspended in the reaction tower, comprising: The relationship between the spray height to the catalyst discharger and the packing density of the catalyst when sprayed at the spray height is determined, and when spraying the catalyst, select the spray height corresponding to the desired packing density from the above relationship. The catalyst filling method is characterized in that the height of the catalyst discharger is adjusted so as to achieve the selected spraying height. 2. A catalyst ejector that is suspended in a reaction tower and can disperse a catalyst in the reaction tower and that can adjust the suspension height, and a control means that controls the height of the catalyst ejector. And a storage unit that stores the relationship between the spraying height from the catalyst surface in the reaction tower to the catalyst discharger and the packing density of the catalyst when sprayed at the spraying height, and The storage unit includes a selection unit that selects a spraying height corresponding to the specified packing density, and an adjusting unit that adjusts the height of the catalyst discharger so that the spraying height selected by the selection unit is obtained. A catalyst filling device characterized by being