JPH0353695Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for removing clogging of a moving particle holding plate of a moving bed used in solid-gas separation or solid-gas catalytic reaction.

[Conventional technology]

Conventionally, louvers, wire mesh, and perforated plates have been used to retain particles in a cross-flow type moving bed. However, especially when a wire mesh or perforated plate is used on the rear side of the moving bed where the gas flows, clogging is unavoidable because the moving particles are in direct contact with the wire mesh or perforated plate and also because of the gas pressure caused by the gas flow. Furthermore, when using a louver, clogging does not occur, but if the gas flow causes particles to spill onto the rear surface, and if the gas flow is concentrated at one point in the moving bed, a phenomenon in which the particles are blown away is observed. .

In consideration of these phenomena, as shown in Japanese Utility Model Application No. 54-152254, a louver or punching metal 7 is used on the rear surface of the moving bed where the gas flows.
By providing a wire mesh 3 on the outside of the louver or punching metal 7 and creating a structure in which the moving particles do not come into direct contact with the wire mesh, the particles are held by the louver or punching metal, and the powder pressure is not applied to the wire mesh. A support structure was adopted that could avoid clogging and reduce particle blow-through.

Furthermore, Japanese Patent Application Laid-open No. 54-82775 discloses that an appropriate space 6 is provided on the downstream side of the louver 3 downstream of the particle packed bed 2.
A dust removal device is described in which a wire mesh 4 equipped with a vibrating device 5 is installed on the exit side across from the wire.

Further, in Japanese Utility Model Application Publication No. 53-132944, the catalyst is held by an upstream wire mesh and a downstream wire mesh, and a hammering device 10 is attached to the wire mesh 6 on the upstream side of the catalyst transfer path 5.
A denitrification device is described in which the dust adhering to the wire mesh 6 on the upstream side is removed by hammering.

[The problem that the idea aims to solve]

In the above-mentioned support structure described in Japanese Utility Model Application Publication No. 54-152254, the wire mesh gradually became clogged after long-term use, which caused problems in operation.

In addition, in the dust removal device described in Japanese Patent Application Laid-Open No. 54-82775, the space between the louver and the wire mesh is filled with blow-through particles, and eventually the particle powder pressure is applied to the wire mesh.

Furthermore, in the denitrification device described in Japanese Utility Model Application Publication No. 53-132944, the catalyst is held in a wire mesh, so if the catalyst is held with a uniform particle size, the wire mesh will not be clogged by the catalyst, but it will not be powdered. If particles with irregular particle sizes are used, clogging cannot be eliminated by hammering a wire mesh that is directly exposed to powder pressure. Also,
This method removes dust adhering to the wire mesh on the upstream side, but does not deal with clogging on the downstream side.

The present invention was developed in view of the above points.In order to prevent particles from blowing through the louver, which is a moving particle holding plate in a cross-flow type moving bed, the wire mesh is installed in a structure in which the wire mesh is clogged with particles or fine powder. If this occurs, the clog removal structure of the moving particle retaining plate of the moving layer is designed to prevent powder pressure from being applied directly to the wire mesh, and to remove clogging of the wire mesh by hammering the wire mesh frame and using vibration. The purpose is to provide

[Means to solve the problem]

In order to achieve the above object, the clog removal structure of the moving particle retaining plate of the moving layer of the present invention, as shown in FIGS. 1 to 6, retains the moving particles 2 between the louvers 1 and 1, In the moving layer in which the gas is made to flow perpendicularly to the louver, a long weave made of hard steel round wire 8 and metal flat wire 9 or metal round wire is woven on the rear surface of the louver on the rear surface of the gas flow. A wire mesh 11 having a slot-like mesh 10 is arranged so as to be in contact with the louver, and the wire mesh 11 is provided so as to be able to vibrate separately from the louver. It is characterized in that a hammering machine 4 is provided adjacent to the hammering machine, and a hammering seat 6 on which a hammering head 5 of the hammering machine is struck is fixed to a wire mesh 11.

[Effect]

A hammer head 5 hits a hammer seat 6 to vibrate a wire mesh 11. Since the moving particles 2 do not come into direct contact with the wire mesh 11, the hammering effectively vibrates the wire mesh 11, making it possible to easily eliminate clogging of the wire mesh. The blind woven wire mesh 11 has long slot-like openings, and even if the scattered particles are fixed, they are made of hard steel round wire, so they are easy to fall off with a hammer, and the round wire also vibrates, so they will fall even further. It becomes easier.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings. FIGS. 1 and 2 show an embodiment of the present invention, and show the area around the moving bed in a dry moving bed reactor for incinerator exhaust gas. Moving particles 2 made of quicklime particles are held between the louvers 1 and 1,
A moving layer is formed by flowing the incinerator exhaust gas containing HC1 and SOX perpendicularly or almost perpendicularly to the louver group. A wire mesh 11 is fixed to the further rear surface of the louver 1 on the rear surface of the gas flow so as to be in contact with the louver 1. A hammering machine 4 is provided close to the wire mesh 11, and a hammer seat 6 on which a hammer head 5 of the hammering machine 4 is struck is fixed to the wire mesh. 7 is a wire mesh fixed frame. The number of hammer strikes is determined by taking into account the ripple effect of hammer strikes. 12 is a rotation axis.

3 to 6 illustrate the wire mesh in the structure of the present invention. That is, in order to obtain a sufficient hammering effect, the wire mesh attached to the louver 1 is made of a hard steel round wire 8 such as a spring steel wire or piano wire and a metal flat wire, as shown in FIGS. 5 and 6. A wire mesh 11 (so-called tie-rod wire mesh) having a long slot-like mesh 10 interwoven with wire meshes 9 and 9 is used so as to be in contact with the louver 1. Hard steel round wire 8
As the metal flat wire 9, for example, a stainless steel wire with a thickness of 0.3 mm and a width of 3 mm is used. In addition, the length of the slot-like mesh is approximately 50 mm. Note that instead of the metal flat wire 9, a metal round wire having a smaller diameter than the hard steel round wire 8 may be used.

The wire mesh 11 is not fixed to the rear surface of the louver, but is inserted into the louver frame, and the wire mesh 11 is provided so as to move loosely within the louver frame. Then, by hammering the hammer seat 6 with the hammer 4, the wire mesh 11 vibrates due to the effect of this play, and the clogging can be removed.

The wire mesh 11 provided on the rear surface of the louver is required to capture scattered particles. Therefore, it is necessary to reduce the opening of this wire mesh 11. When a plain weave wire mesh is used as the wire mesh 11, the scattered particles are fixed in the openings and do not fall off due to vibration. Further, the use of punched metal causes a similar phenomenon, and in addition, the perforation ratio of punched metal mesh such as punched metal becomes small, leading to an increase in pressure loss. In order to eliminate these phenomena, that is, clogging with scattered particles and increased pressure loss due to decreased porosity, the blind woven wire mesh 1
1 is effective.

The blind woven wire mesh 11 has long slot-like openings, and even if scattered particles are fixed, since it is made of hard steel round wire, it is easy to fall off when hammered, and the round wire also vibrates, so particles can be further trapped. becomes easier to fall off. Also,
Since the porosity can be increased, pressure loss is small. In addition, when processing a long slot shape using a punched wire mesh, there is a limit to the length of the slot due to the processing surface, and since the opening is square, it is difficult for clogged particles to fall out.

In this embodiment, the hard steel round wire 8, which is a woven wire, undergoes secondary vibration when hammered, and since it has a long slot-shaped opening, the wire mesh 11 is less likely to be clogged. This has the advantage of increasing the effect of hitting.

[Effect of idea]

As explained above, the present invention provides a wire mesh having a long slot-like mesh woven on the rear surface of the rear louver so that it is in contact with the louver and vibrates, and a hammer is hammered in close proximity to the wire mesh. Since it is equipped with a machine, it has the following effects.

(1) Particles are extremely unlikely to spill onto the rear surface of the moving bed or blow through due to the gas flow, and if clogging occurs due to fine powder, it can be easily removed by hammering.

(2) If there is a space between the louver and the wire mesh, this space will be filled with blow-through particles, which will eventually apply particle powder pressure to the wire mesh. This can be prevented since it is provided so as to be able to vibrate freely.

(3) Blind woven wire mesh has long slot-shaped openings, and even if scattered particles are fixed, since it is made of hard steel round wire, it is easy to fall off when hammered, and the round wire also vibrates. , particles fall more easily.
In addition, since the porosity can be increased,
Pressure loss becomes smaller.

(4) The effect of hammering is that when all the particles in the moving layer are extracted, the remaining particles are removed by the louver, which also serves to clean the moving layer.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an embodiment of the clog removal structure of the moving particle holding plate of the moving layer of the present invention, Fig. 2 is a right side view of the same, and Fig. 3 shows the area around the moving layer in the structure of the present invention. Explanatory drawing, Figure 4 is the same right side view, Figure 5
The figure is an enlarged view of the part surrounded by a chain line circle in FIG. 4, and FIG. 6 is a side view of the same. 1... Louver, 2... Moving particles, 4... Hammering machine, 5... Hammer head, 6... Hammer seat, 7... Wire mesh fixed frame, 8... Hard steel round wire, 9... Metal flat wire, 10
...Slot-like mesh, 11...Wire mesh, 12...
rotation axis.

Claims (1)

[Scope of utility model registration request] In the moving layer in which the moving particles 2 are held between the louvers 1 and 1, and the gas is made to flow perpendicularly to the louvers, a hard steel round wire 8 and a metal flat wire are placed further behind the louvers on the rear surface of the gas flow. 9 or long slot-like mesh woven with metal round wire 1
0 is placed in contact with the louver, this wire mesh 11 is provided so that it can vibrate separately from the louver, and the wire mesh 11 is hammered.
1, a hammering machine 4 is provided in close proximity to the wire mesh 11 so as to vibrate the hammer, and a hammer seat 6 for hitting the hammer head 5 of the hammering machine is fixed to the wire mesh 11. Clogging removal structure for moving particle retaining plate.