JPH0889741A - Packing method of adsorbent - Google Patents

Abstract

PURPOSE: To completely pack an adsorbent without unavailable volume into an absorption tower of a pressure swing or pressure-temp. swing physical adsorbing system. CONSTITUTION: The adsorbent 2 is packed by gravity from a pressure packing hopper 14 to a packing bed formed by partitioning the inside of the adsorption tower 1 with an upper wire mesh 3, a lower wire mesh 7 and a perforated plate 8. After that, the adsorbent is packed under reduced pressure fluidizing by charging a pressurized gas into the tower from a blower 9 to pressurize in such a state that the adsorbent 2 is capable of being supplied from the pressure packing hopper 14 and after that, releasing the gas with the pressure reducing valve 13 opened to reduce the pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pressure swing or pressure
The present invention relates to a method for filling an adsorption tower with an adsorbent applied in a temperature swing physical adsorption method.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show a conventional adsorbent filling method in a physical adsorption type adsorption tower. In FIGS. 4 and 5, the adsorption tower 1 is provided with a lower end plate 11 and an upper end plate 12 that connect the inlet and outlet pipes of the gas to be processed to the upper and lower sides of a vertical cylindrical tower body. Inside the adsorption tower 1, an adsorbent-packed layer containing the adsorbent 2 is formed, which is partitioned by an upper wire net 3 inside and a lower plate 8 and a lower wire net 7 inside.

Inside the adsorption tower 1, there are provided a plurality of supply pipes which penetrate the upper end plate 12 and are connected to the upper wire netting 3, and a charging hopper 4 is provided at the top of these supply pipes. Further, the tower body below the upper wire netting 3 is provided with a hole 5 for a poking rod, through which the poking rod 6 can be inserted into the adsorbent-filled layer.

It is necessary to fill the adsorbent packed bed in the adsorption tower 1 constructed as described above with the adsorbent, but the packing process is divided into a rough packing process and a pecking rod packing process. FIG. 4 shows a rough filling step, and FIG. 5 shows a poking rod filling step. In the rough filling step shown in FIG. 4, the adsorbent 2 is put in a plurality of filling hoppers 4 provided at the upper part of the adsorption tower 1, and the adsorbent 2 is passed through a supply pipe that penetrates the upper end plate 12 and is connected to the upper wire net 3. Is a step of filling the packed bed by gravity.

However, in this method, since the particles of the adsorbent 2 form an angle of repose, the upper wire netting 3 is not filled with the particles of the repose angle, as shown in FIG.
As shown in, some areas are not filled. Corresponding to this, the pouring rod filling process shown in FIG. 5 is started, and the pouring rod hole 5 provided in the upper part of the tower body of the adsorption tower 1 and immediately below the upper wire netting 3 is used. Although the process of inserting the rod 6 and continuing the filling to level the upper part of the adsorbent 2 is performed, the actual condition is that the level cannot be completely leveled and a space remains.

[0006]

As described in the preceding paragraph, in the conventional adsorbent filling method, the filling is incomplete, the adsorbent is not filled in the packed bed, and there is a large amount of ineffective volume. Since the surface has irregularities, it is unavoidable that the effective utilization rate of the adsorbent decreases. The present invention has been made to solve such a problem, and is to fill an adsorbent in a pressure swing or pressure / temperature swing physical adsorption system with an adsorbent that can be completely filled without an ineffective volume. The challenge is to provide a method.

[0007]

According to the present invention, end plates for connecting a gas outlet and an inlet pipe are attached to the top and bottom of a vertical cylindrical tower body, and the top and bottom are adsorbent particles inside the tower body. The problem in the method of filling the adsorbent in the adsorbent-packed layer in the adsorption tower of the pressure swing or the pressure-temperature swing physical adsorption method in which the adsorbent-packed layer partitioned by the perforated part for preventing the deviation of To solve the problem, the following method is adopted.

That is, the adsorbent can be supplied to the adsorbent packed bed from the pressurizing filling hopper so that the pressurized gas is fed into the tower body to pressurize it, and then the gas is released to reduce the pressure. This is a method for filling an adsorbent in which fluidization under reduced pressure is carried out.

In this case, the pressurized gas into the tower body is sent by the blower connected to the gas inlet pipe attached to the lower mirror plate, and the gas released from the tower body is discharged from the gas outlet port mounted to the upper mirror plate. This is done by opening the pressure reducing valve connected to the tube.

[0010]

By using such means, the filling operation is performed as follows. That is, the means of the present invention is a filling method for filling the adsorbent into the inner filling layer from the filling hopper provided at the upper part, and the rough filling step by gravity from the filling hopper is the same as the conventional method, but Instead of the leveling process using a pecking rod that has been performed, first, a pressurizing process is provided, and the inside of the adsorption tower is pressurized using a blower that is permanently installed. As a matter of course, the filling hopper itself is also pressurized in a state where the filling adsorbent is contained therein, and therefore, in this step, the filling hopper must be sealed and pressure-resistant.

When the pressure in the adsorption tower reaches a certain level due to the feeding of the pressurized gas by the blower, this step ends, and the next step of reduced pressure fluidization filling is started. The filling by reduced pressure fluidization is performed by opening and closing a pressure reducing valve provided in an upper end plate or a gas outlet pipe connecting portion connected to the upper end plate to release the gas in the packed column.

By this operation, a so-called fluidization phenomenon occurs in which the adsorbent particles which are pressurized and form an angle of repose flow by decompression by opening and closing the pressure reducing valve on the upper side. As a result, the angle of repose formed in the powder and granules in the packed bed collapses and is leveled in the process of depressurization, while the shortage of powder and granules is replenished by the pressurizing filling hopper, and finally at the end of this step. The adsorbent is filled up to the wire mesh of the upper part of the plate. By such an action, by using the adsorbent filling method of the present invention, the ineffective volume in the adsorption tower can be reduced and the adsorbent utilization rate can be increased.

[0013]

Embodiments of the filling method according to the present invention will be specifically described below with reference to FIGS. 1 to 3, parts having the same configurations as those of the device shown in FIGS. 4 and 5 are denoted by the same reference numerals, and duplicate description thereof will be omitted.

1 to 3, a pressure reducing valve 13 is connected to a gas outlet pipe 16 attached to the upper end plate 12. Further, the filling hopper 14 is provided with a lid 15 which can be opened and closed, and serves as a pressure filling hopper. Lower end plate 11
At the gas inlet pipe 17 attached to the adsorption tower gas inlet valve 1
0, and a blower 9 for feeding a pressurized gas into the adsorption tower 1 from the gas inlet pipe 17.
The other structure is substantially the same as that of the device shown in FIGS.

1 to 3 showing an embodiment of the filling method according to the present invention, FIG. 1 shows a rough filling step, FIG. 2 shows a pressurizing step, and finally FIG. 3 shows a reduced pressure fluidization filling step. Next, the filling method will be described. Adsorption in a packed bed formed between the upper wire net 3 and the lower plate 8 which are provided above and below the columnar column to prevent the particles of the adsorbent 2 from escaping. Agent 2
To store.

In the rough filling step shown in FIG. 1, the lid 15 of the upper pressure filling hopper 14 is opened to put the adsorbent 2, and the upper end plate 12 is penetrated from the hopper and connected to the upper wire net 3 part. The packed bed is filled with the adsorbent 2 by gravity through a chute tube. This operation is the same as before. In this step, the adsorbent 2 cannot fill the upper wire netting 3 to fill the reed angle.

Therefore, the next step of pressing shown in FIG. 2 is carried out. In this case, the adsorbent 2 is sufficiently put in the filling hopper 14 for pressurization, and the lid 15 is closed so that the pressurization can be performed. The inside of the adsorption tower is pressurized with the target gas by the blower 9. When the pressure in the adsorption tower 1 reaches a constant value, this process ends.

Next, in the reduced pressure fluidization filling step of FIG. 3, the pressure in the adsorption tower 1 pressurized in the previous step is adjusted to the upper gas outlet pipe 1
The pressure reducing valve 13 provided at 6 is opened and closed to reduce the pressure. By this operation, the adsorbent particles in the packed bed, which are pressurized and form the angle of repose, become
The so-called fluidization phenomenon occurs in which the fluid flows due to the decompression caused by the release of.

As a result, the angle of repose in the packed bed collapses and is leveled in the process of depressurization, while the deficient portion is filled by the pressurizing hopper 1.
4 and finally, at the end of this step, the adsorbent 2 is filled up to the wire mesh of the upper wire mesh 3 part.

The present invention has been specifically described above based on the illustrated embodiment, but the present invention is not limited to this, and within the scope of the present invention as set forth in the claims, various concrete methods can be used. It goes without saying that changes may be made.

[0021]

As described above, as compared with the adsorbent filling method in the adsorption tower to which the pressure swing or pressure / temperature swing physical adsorption method is applied, the pressurizing step and the reduced pressure fluidization according to the present invention are performed. By the filling method using the filling step, it is possible to reduce the ineffective volume in the adsorption tower and to increase the utilization rate of the adsorbent.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a rough filling step in an adsorbent filling method according to an embodiment of the present invention.

FIG. 2 is an explanatory view showing a pressurizing step in an adsorbent filling method according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing a reduced pressure fluidization filling step in the adsorbent filling method according to an embodiment of the present invention.

FIG. 4 is an explanatory view showing a rough filling step in a conventional adsorbent filling method.

FIG. 5 is an explanatory view showing a pecking rod filling step in a conventional adsorbent filling method.

[Explanation of symbols]

 1 Adsorption Tower 2 Adsorbent 3 Upper Wire Mesh 4 Filling Hopper 5 Hole for Stick Rod 6 Stick Rod 7 Lower Wire Mesh 8 Lower Plate 9 Blower 10 Adsorption Tower Gas Inlet Valve 11 Lower End Plate 12 Upper End Plate 13 Pressure Reduction Valve 14 Pressurizing Filling Hopper 15 Lid 16 Gas outlet pipe 17 Gas inlet pipe

Claims (1)

[Claims] 1. A vertical cylinder type column body is provided with upper and lower end plates for connecting a gas outlet and an inlet pipe, respectively, and a top and bottom part of the column body which prevents deviation of adsorbent particles. A method of filling an adsorbent into the adsorbent-packed layer in an adsorption tower of a pressure swing or pressure-temperature swing physical adsorption method in which an adsorbent-packed layer partitioned by is formed,
After adsorbing a pressurized gas from a blower connected to the gas inlet pipe into the tower body so that the adsorbent can be supplied to the adsorbent packed bed from a pressurizing filling hopper, the gas is pressurized. A method for filling an adsorbent characterized in that reduced pressure fluidization filling is performed by discharging from a pressure reducing valve connected to the gas outlet pipe and reducing the pressure.