JPS5822473Y2 - Gas transport pipe containing particulates - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a particulate-containing gas transport pipe in which the structure of the curved pipe portion is improved.

Generally, when transporting particulate-containing gas, such as exhaust gas discharged from cement clinker firing equipment, to other equipment via a transport pipe, there is a risk that the bent portion of the transport pipe, which is susceptible to collisions with particulates, may be worn out and damaged. In particular, when the temperature of the exhaust gas is high (200 to 100° C.), wear of the curved pipe portion is further accelerated.

For this reason, conventionally, transport pipes have been lined with castable refractories, or rectangular refractory bricks or refractory heat insulating bricks with an adhesive interposed therebetween.

However, although the former lining made of castable refractory material has the advantage of being easy to construct, it has low wear resistance and the curved pipe portion is worn out and damaged in a short period of time.

On the other hand, the latter lining with fireproof bricks and fireproof insulation bricks can improve the abrasion resistance of bent parts, but since these bricks have a rectangular shape, when lining a bent pipe part, it is necessary to make it small and close to the wall. The parts cannot be combined effectively, resulting in a relatively large number of joints (joints) between the bricks, resulting in reduced wear resistance, as well as complicated work and low construction efficiency.

The present invention was developed to eliminate the above-mentioned drawbacks, and aims to provide a gas transport pipe containing fine particles that significantly improves the wear resistance of the curved pipe section and at the same time improves the ease of lining the curved pipe section. It is.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a metal tube body.

As shown in FIG. 1 and FIG. 2 viewed from the center of the curved tube radius, a hexagonal plate-shaped hexagonal plate made of a wear-resistant material such as silicon carbide, alumina, or tungsten carbide is attached to the inner surface of the bent tube portion 1a of the tube body 1. A plurality of refractory bricks 2...2 are provided via castable mortar 3, and each refractory brick 2...2 is provided with a pin 4 made of a wear-resistant material.
...Fixed by 4.

However, according to the present invention, refractory brick 2...
By making 2 into a hexagonal plate shape, when lining the curved pipe portion 1a, even if large firebricks are used, the firebricks can be effectively combined according to the curvature of the curved pipe, improving workability. can be significantly improved.

In addition, since the hexagonal plate-shaped refractory material 2 lining the curved portion 1a of the pipe body 1 has excellent wear resistance, this pipe is When passing particulate-containing gas such as exhaust gas to be discharged, it is possible to prevent the bent pipe portion 1a from being locally worn away by the particulate-containing gas.

Moreover, the pins 4 for fixing the hexagonal plate-shaped refractory material 2 are made of a wear-resistant material to prevent wear and damage to the support pins. This makes it possible to prevent the refractory material 2...2 from falling off.

Note that the shape of the refractory material used in the present invention is not limited to the above embodiment, and for example, as shown in FIGS. The hexagonal plates 2, 2 may be fixed by pins 4, 4 whose lower portions are threaded and supported by a heat-insulating cask pull 5.

If refractories with this structure are used, adjacent refractories are connected to each other via stepped sections, which reduces selective wear from joints (joints) and improves connectivity between refractory bricks. In turn, the strength of the refractory brick lining on the tube body can be increased.

Further, the support and fixing structure of the pin used in the present invention is not limited to the above-mentioned implementation. For example, as shown in FIG. 5, a bolt 6 is fixed to the inner wall of the tube body 1 by welding, and the lower end of the bolt 6 is threaded. Alternatively, a bolt 6 having a stud 7 may be fixed to the inner wall of the tube body 1 by welding as shown in FIG. It may be supported by screwing a threaded pin 4' around which a coil spring 8 is wound.

However, in place of the castable 5 in which the pin 4' etc. are buried in FIG. 5, a ceramic fiber heat insulating material may be used.

As detailed above, according to the present invention, it is possible to significantly improve the wear resistance of the curved pipe section and extend its useful life, and at the same time, it is possible to improve the ease of lining the curved pipe section, thereby reducing manufacturing costs. Therefore, it is possible to provide a fine particle-containing gas transport pipe that has extremely high practical value.

[Brief explanation of drawings]

Fig. 1 is a partial sectional view of a particulate-containing gas transport pipe showing an embodiment of the present invention, Fig. 2 is a plan view of the curved pipe part seen at an equal distance from the radius of curvature of Fig. 1, and Fig. 3 The figure is a plan view of a refractory lining for a gas transport pipe containing particulates showing another embodiment of the present invention, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIGS.
The figures are cross-sectional views showing other examples of how to attach the pins used in the particulate-containing gas transport pipe of the present invention. 1...Pipe body, 1a...Bent pipe part, 2.
...2゜2'...2'...Refractory, 4.4'...Pin, 5...Castable, 6... ····bolt.

Claims (1)

[Scope of utility model registration request] A fine particle-containing gas transport pipe characterized in that a hexagonal plate-shaped refractory brick made of a wear-resistant material is fixed to the curved pipe portion with pins made of a wear-resistant material and lined with the lining.