JPH0133155Y2 - - Google Patents

Description

[Detailed explanation of the idea]

(Field of Industrial Application) The present invention relates to a support fitting used for constructing wear-resistant refractory linings in internal pressure vessels of petroleum refinery plants, such as regeneration towers, reaction towers, cyclones, and valves of fluid catalytic cracking equipment. It is. (Prior Art) Since the internal pressure vessels and the like are subject to significant wear due to the flow of the catalyst during hot conditions, strict conditions are required for the wear-resistant refractory material for lining and the construction method. Conventional lining support metal fittings include a net-like support called a hex mesh, in which a plurality of thin steel strips 1, 1... continuously bent in a trapezoidal shape are welded together in a honeycomb structure, as shown in Fig. 6. There are metal fittings. (Problems to be solved by the invention) However, this support metal fitting has the disadvantage that the production and assembly of the plurality of thin steel strips requires a lot of labor and cost, and the assembled finished product is a fairly wide planar body. Because it lacks flexibility, it is difficult to carry it through narrow manholes, and it is difficult or impossible to install it in narrow, curved, or uneven areas. In addition, the maximum thickness of the lining material embedded in conventional structures was approximately 19 mm, making it impossible to construct a thin lining. Furthermore, this mesh-like support metal fitting has not only problems in manufacturing cost and construction workability, but also a problem in that the lining material peels off and falls off due to the difference in thermal expansion between the support metal fitting and the lining material. In other words, due to recent improvements in operational efficiency, the operating temperature has decreased.
As the temperature rose by nearly 100°C and the hardness of the catalyst also increased, the exposed support metal fittings were subjected to significant wear. It was proposed to embed it in the lining material 4. However, since this net-like support fitting 2 has poor absorption of the difference in thermal expansion between the lining material 4 and the support fitting 2,
As both of them repeat thermal expansion and contraction along the surface of the shell 5, as shown in FIG. It peels off together with the lining material 4 of the surface layer covering the support metal fitting 2. In this way, the abrasion effect of the catalyst is directly applied to the net-like support metal fitting 2, and due to repeated peeling and falling off as the operating time elapses, it eventually becomes damaged as shown in FIGS. 9 and 10. The lining material 4 is completely lost, leading to damage to the shell 5. Therefore, the purpose of the present invention is to reduce manufacturing and processing costs compared to conventional mesh-like support metal fittings, and to be able to absorb thermal expansion differences between the support metal fittings and the lining material, and to maintain the lining material even after long-term use. It is an object of the present invention to provide a support metal fitting that does not peel off or fall off. (Means for Solving the Problems) As explained below using the reference numerals in the attached drawings, the support fitting 11 for a wear-resistant fireproof lining of an internal pressure vessel, etc. of the present invention is made of a flat thin metal strip. , are attached to the shell surface at intervals of 0.5 to 10, preferably 0.6 to 7, to the height of the metal strip. The support fitting 11 is attached to the shell 13 of an internal pressure vessel or the like through a suitable seat plate or attachment member, or directly attached to the shell 13 by an appropriate means such as welding, but the embodiment shown in FIG. Now, support metal fitting 1
1 is welded to a metal shell 13. Although it is desirable that the plurality of supporting metal fittings 11, 11, . It is not necessary to attach the support fitting 11 to the shell 13 continuously over the entire length of the support fitting 11, but in consideration of work efficiency and labor cost, it may be installed discontinuously at intervals in the length direction. Good too. The spacing between the supporting metal fittings 11 has a correlation with the thickness of the lining material 12. When the lining material 12 is thin, the spacing between the supporting metal fittings 11 needs to be narrowed, and when the lining material 12 is thick, the spacing between the supporting metal fittings 11 needs to be narrowed. The placement interval can be widened. A flat thin metal strip may be used as it is as the support fitting 11, but in order to increase the bonding force between the lining material 12 and the support fitting 11, it may be used as shown in FIGS. 1, 2, and 3. It is also possible to form the tab 14 by cutting and raising a part of the thin metal strip, or to punch out through holes 15 and notches 16 in the thin metal strip. The tabs 14 can not only protrude in the same direction, but can also be oriented in multiple directions. (Experiment example 1) As shown in Table 1, the embedded thickness of the lining material was unified to 10 mm, and the mounting interval of the supporting metal fittings of the present invention, which was 250 mm long, 8 mm high, and 3 mm thick, was changed from 8 mm to 105 mm. Mounted on a 500×500mm panel, 800
Rapid heating and cooling at ℃ was performed 20 times, and peeling and falling of the lining material was observed. In the comparative example, a conventional mesh support metal fitting (hex mesh) was used.

[Table] (Experiment Example 2) As shown in Table 2, the embedded thickness of the lining material was unified to 40 mm, and the support bracket of the present invention with a length of 250 mm, a height of 15 mm, and a thickness of 3 mm was installed from 5 mm to 200 mm. Change the spacing and install it on a 500 x 500 mm panel.
Rapid heating and cooling at 800°C was performed 20 times, and peeling and falling of the lining material was observed. Incidentally, when the installation interval was 5 mm, it was too narrow and construction was impossible. In the comparative example, a conventional mesh support metal fitting (hex mesh) was used.

【table】

[Table] (Effects of the invention) As described above, since the supporting metal fittings of the present invention consist only of flat thin metal plates, this structure enables the construction of a thin lining, which was previously considered impossible. It can also be applied to previously used areas, preventing equipment wear and extending its lifespan. Furthermore, compared to conventional mesh-like support fittings that are assembled from a plurality of members, manufacturing of the support fittings is extremely simple, and manufacturing costs can be significantly reduced. In addition, since the support metal fittings are flexible and are transported to the construction site separately and independently from each other, they can be easily transported through narrow manholes, compared to mesh support metal fittings that must be transported in the form of a fairly wide planar body. It is extremely easy to transport and has good workability. Furthermore, the multiple support fittings are attached to the shell independently of each other, and contact the shell and seat plate with line contact rather than surface contact, so they can be used in narrow areas, curved areas, etc.
The mounting of the support fittings on uneven parts is simple and easy, and the construction efficiency is also excellent. In addition, since the multiple support fittings are independently attached to the shell and do not restrict each other during thermal expansion and contraction, they are excellent at absorbing the difference in thermal expansion between the support fittings and the lining material, and even after long-term use, the lining material remains There is no peeling or falling off. Furthermore, since this support metal is composed of a flat thin metal strip, for example, when the support metal is discontinuously attached to the shell from the viewpoint of improving construction efficiency, the thermal The expansion and contraction is mainly in the transverse direction, and since the amount of expansion and contraction can be suppressed to a small level, there is no risk of the lining material peeling off and falling off.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a support fitting according to an embodiment of the present invention. FIGS. 2 and 3 are perspective views of support fittings according to different embodiments of the present invention. Fourth
This figure is a plan view showing an example of the arrangement of the support fittings shown in FIG. 2, and FIG. 5 is a sectional view of the support fittings in use. FIG. 6 is a plan view of a conventional mesh support fitting. Figure 7 is a cross-sectional view of the support fitting shown in Figure 6 in use, Figure 8 is a cross-sectional view of the surface lining material that has peeled off, and Figure 9 shows holes in the shell due to progressive wear and peeling. A plan view of the open state, and FIG. 10 is a cross-sectional view of the same state. 11...Supporting metal fittings, 12...Lining material, 1
3...Ciel, 14...Tab, 15...Through hole.

Claims (1)

[Scope of utility model registration request] It consists of a thin metal strip that has the same width over its entire length and is provided with a large number of through holes, notches, or side tabs that pass through the thickness, and the plurality of thin metal strips are aligned in the longitudinal direction. The bottom surface and the bottom surface are arranged on the seat plate or metal shell surface, with the side end surfaces set up as the bottom surface, and arranged at intervals of 0.5 to 10 to the height of the thin metal strip over the entire length of the construction area. A support fitting for wear-resistant fire-resistant linings of internal pressure vessels, etc., which is installed intermittently or by welding on the entire length of the side end face.