JPS64999Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for holding moving particles in a moving bed used in solid-gas separation or solid-gas catalytic reaction.

Conventionally, louvers, wire mesh, and perforated plates have been used to retain particles in orthogonal moving beds. 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, a louver is used at the rear of the gas flow in the moving bed, a wire mesh is attached directly to the louver, and the structure is such that the moving particles do not come into direct contact with the wire mesh, thereby preventing clogging of the wire mesh. Particle blow-through can be solved at the same time.

However, when a plain weave wire mesh is used as the wire mesh directly attached to the louver, there is a problem in that the openings of the wire mesh gradually become clogged in the case of highly adhesive fine particles such as calcium compounds.

The present invention was developed in view of the above points, and in a moving layer in which moving particles are held between the louvers and gas is allowed to flow perpendicularly to the louvers, a hard steel circle is attached to the rear surface of the louvers at the rear of the gas flow. A wire mesh having a long slot-like mesh weaved with a wire and a metal flat wire or a metal round wire is fixed in contact with a louver, thereby reducing clogging of the wire mesh by moving particles in a moving layer. It is intended to provide a holding structure.

Hereinafter, the configuration of the present invention will be explained based on the drawings. FIG. 1 shows the area around the moving bed in a dry moving bed reactor for incinerator exhaust gas, as one embodiment of the present invention. Moving particles 2 made of quicklime particles are held between the louvers 1, 1, and incinerator exhaust gas containing HCl and SOx is caused to flow perpendicularly or almost perpendicularly to the louvers 1, thereby forming a moving layer.
On the rear surface of the louver 1 on the rear surface of the gas flow, as shown in FIGS. 2 and 3, there is a long slot weaved with a hard steel round wire 3 such as a spring steel wire or piano wire and a metal flat wire 4. A wire mesh 6 (so-called tie-rod wire mesh) having a shaped mesh 5 is fixed so as to be in contact with the louver 1. As the hard steel round wire 3, for example, a stainless steel wire with a diameter of 1 mm is used,
As the metal flat wire 4, for example, a stainless steel wire with a thickness of 0.3 mm and a width of 3 mm is used. Also, the length of the slot-like mesh should be approximately 50 mm. Note that a metal round wire having a smaller diameter than the hard steel round wire 3 may be used instead of the metal flat wire 4.

As explained above, according to the present invention, it is extremely unlikely that particles will spill onto the rear surface of the moving bed or blow through due to the gas flow, and even if fine powder is generated, clogging of the wire mesh can be reduced. play.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the moving particle holding structure of the moving layer of the present invention, FIG. 2 is a plan view showing an example of the wire mesh used in FIG. 1, and FIG. 3 is a side view of the same. 1... Louver, 2... Moving particles, 3... Hard steel round wire,
4...Metal flat wire, 5...Slot-like mesh, 6...Wire mesh.

Claims (1)

[Scope of utility model registration request] In a moving layer where moving particles are held between the louvers and gas is allowed to flow perpendicular to the louvers, a hard steel round wire and a metal flat wire or a metal round wire are placed on the rear surface of the louver at the rear of the gas flow. A structure for retaining moving particles in a moving layer, characterized in that a wire mesh having long slot-like meshes is fixed in contact with a louver.