JPS5848210B2 - Sealing device for rotating cylindrical reactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealing device for a rotating cylindrical reactor.

The rotating cylindrical reactor has a cross-sectional structure as shown in FIG.

That is, in Fig. 1, the rotating cylinder is designated as a whole by the reference numeral 1, and has a certain double cylindrical structure consisting of an outer cylinder 2 and an inner cylinder 3 (each cylinder is formed from a perforated plate). A catalyst 4 is filled in a cylindrical space between the inner and outer tubes 2 and 3.

As shown in FIG. 1, the filling amount of the catalyst 4 is such that a part of the inner cylinder 3 is exposed over a certain range as shown by the symbol S2.

Such a rotating cylinder 1 is housed in a casing 5,
Both ends thereof are supported by bearings (not shown), and are rotated at a predetermined rotational speed by a driving device.

At one end of the casing 5, a gas inlet 6 is formed on the side desired to be on the S1 side, which is the range where the catalyst 4 of the rotating cylinder 1 is always present, and on the side facing the S2 range, which is the side where the catalyst 4 is not present. An outlet 7 is formed.

Based on the structure described above, when gas to be processed is fed into the rotating cylinder 1 from the gas inlet 6, the gas flows from the part indicated by the symbol S1 of the outer cylinder 2 of the rotating cylinder 1 through the perforated plate to the cylinder side. and is guided inside the inner cylinder 3 through the layer of catalyst 4.

Then, when passing through the layer of catalyst 4, a predetermined reaction is carried out by the catalyst 4.

The gas after the reaction that has entered the inner cylinder 3 passes through a portion S2 where the catalyst 4 is not present and is discharged from the gas outlet 7.

If operation continues in this way, if the gas to be processed contains dust, it will gradually be captured and accumulated in the catalyst layer, increasing ventilation resistance and reducing reaction efficiency. do.

Therefore, when the pressure drop in the catalyst layer reaches the allowable value, the rotating cylinder 1
When it is slowly rotated about 2 to 3 rotations in the direction of arrow N, the catalyst 4 that has reached the upper layer a of the catalyst 4 collapses toward the lower layer b.

During this time, the dust trapped between the catalysts 4 is loosened, ejected from a portion 82 of the inner cylinder 3, scattered into the gas to be treated, and discharged from the outlet 7 along with the gas.

Therefore, by rotating the rotating cylinder 1 from time to time, the amount of dust captured by the catalyst 4 can be kept below a certain amount, so that the so-called dirty gas containing dust can be treated.
It can be performed stably and continuously over a long period of time.

By the way, in the rotating cylindrical reactor having the above-mentioned functions, it is necessary to partition the inlet side and the outlet side of the casing 5 due to its structure, and specifically, the gap C between the casing 5 and the outer cylinder 2 is , d must be sealed to prevent gas from leaking.

The sealing device for portions c and d must have a structure as simple as possible and must meet the following requirements.

(1) When the operating temperature of the reactor is high, a temperature difference occurs between the rotating cylinder 1 and the casing 5 when starting and stopping, and there is no problem even if the sizes of the gaps c and d change due to the difference in thermal expansion. not occur.

(2) The frictional resistance against the rotation of the drum should be as low as possible.

(3) The amount of gas leaking should be as small as possible.

The present invention has been made in response to the above-mentioned needs, and an object of the present invention is to provide a sealing device for a rotating cylindrical reactor that can perform reliable sealing.

Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

FIG. 2 and subsequent figures illustrate one embodiment of the present invention. In the figures, the same parts as in FIG. 1 are designated by the same reference numerals, and the explanation thereof will be omitted.

In FIG. 2, the reference numeral 8 is a sealing plate, which is made of a thin plate of ordinary steel or stainless steel, depending on the conditions of use.

This seal plate 8 is arranged in the gap c + d, and one end thereof is fixed via a clamp 10 to a protrusion 9 protruding from the casing 5 {[11], and the other end is fixed to the protrusion 9 protruding from the outer cylinder 2. The screw shaft 11 is attached to the outer peripheral surface of the screw shaft 11 and connected to the tip of a screw shaft 11 attached to the casing 5 side.

The screw shaft 11 also serves as a tension bar, and a nut 12 is screwed onto its outer end, and a spring 13 is fitted between the nut 12 and the casing.

Therefore, by turning the nut 12, which also serves as a spring holder, the elastic force of the spring 13 can be adjusted, and the tension applied to the seal plate 8 can be adjusted, and the seal plate 8 can also be adjusted even if the seal plate 8 expands or contracts due to temperature differences. The elasticity of the spring 13 can sufficiently absorb this.

The seal plate 8 has a width equivalent to the length of the rotating cylinder 1 in the axial direction, and is designed to prevent gas from leaking from both ends of the rotating cylinder 1.

Since this embodiment is constructed as described above, the population of 6 between the range X-Y where the seal plate 8 and the outer cylinder 2 contact
The side and exit 7 side are securely separated and sealed.
No gas leaks occur.

Even if the diameter of the rotating cylinder 1 changes due to a temperature difference, the presence of the spring 13 can absorb the change and the sealing effect will not be lost.

By the way, in order to adjust the tension of the seal plate 8, the nut 1 is
2, as shown in FIG. 3, fix the lever 14 to one end of the spring 13 and rotate it via the knob 15 of the lever 14 to control the amount of deflection of the spring 13. It may also be configured to vary and adjust its elasticity.

On the other hand, as the device becomes larger and the length and diameter of the rotating cylinder 1 increase, its roundness inevitably deteriorates, and if the seal plate 8 is made of a single thin plate, the state of close contact with the outer cylinder 2 will also be incomplete. This makes centering difficult during installation.

In such a case, as shown in FIG. 4, the seal plate 8 may be constructed from a divided seal plate 8a that is divided into a plurality of pieces, and the divided seal plates 8a are arranged with a predetermined gap g. is covered by the auxiliary plate 16, and the divided seal plate 8a
What is necessary is to adopt a structure that allows for relative displacement.

If such a structure is adopted, even if the seal plate 8 expands or contracts in the width direction due to a temperature difference, this can be sufficiently absorbed by the gap g.

Furthermore, without using the auxiliary plate 16, a structure may be adopted in which the divided seals 8a are overlapped one part at a time, as shown in FIG. 5, and can be freely slid.

As is clear from the above description, according to the present invention, the seal plate whose tension can be freely adjusted is brought into contact with the outer shell of the rotating cylinder, and the inlet side and the outlet side of the gas to be treated can be completely partitioned off. , an excellent sealing device can be obtained with an extremely simple structure.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional side view of a general rotating cylindrical reactor, and FIG. 2 and subsequent figures illustrate an embodiment of the present invention.
FIG. 2 is a vertical side view, FIG. 3 is a vertical side view showing an example of the tension adjustment mechanism of the seal plate, and FIGS. 4 and 5 are parts illustrating different structural examples of the seal plate. It is an enlarged sectional view. 1...Rotating cylinder, 2...Outer cylinder, 3...
...Inner cylinder, 4...Catalyst, 5...Casing, 6...Inlet, I...Outlet,
8... Seal plate, 10... Clamp,
11... Screw shaft, 12... Nut, 1
3...Spring, 14...Lever.

Claims (1)

[Scope of Claims] 1. Between the outer cylinder and the casing of a rotating cylinder of a rotating cylindrical reactor in which a predetermined amount of catalyst is filled between the outer cylinder and the inner cylinder, and the rotary cylindrical reactor is rotatably suspended horizontally within the casing, A rotation device characterized in that a sealing plate is disposed in contact with the outer peripheral surface of the envelope so as to partition the gas inlet side and the outlet side, and the tension of this sealing plate can be adjusted. Sealing device for cylindrical reactor. 2. The sealing device for a rotating cylindrical reactor according to claim 1, characterized in that the seal plate is divided into a plurality of pieces in the width direction and arranged at predetermined intervals, and the gap portion is covered by an auxiliary plate. . 3. The sealing device for a rotating cylindrical reactor according to claim 1, wherein the sealing plate is divided into a plurality of parts in the width direction and arranged in a partially overlapping state.