JPH0153576B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to wear-resistant refractory lining structures in internal pressure vessels of petroleum refinery plants, such as regeneration towers, reaction towers, cyclones, valves, etc. of fluid catalytic cracking equipment, particularly It relates to supporting the lining material at the tip, corner, and joint end of the internal pressure vessel, etc.

(Prior Art) The above-mentioned internal pressure vessels are subject to significant wear due to the flow of the catalyst during hot conditions, so strict conditions are required for the wear-resistant fire-resistant lining structure. , processing at the tip, corner, and joint end of an internal pressure vessel, etc.

Conventionally, as a support member to ensure that the lining material does not fall off the shell surface of an internal pressure vessel, etc., the only support member that has been assembled is a net-like support member in which a plurality of thin steel strips continuously bent in a trapezoid shape are joined together in a honeycomb structure. are used together.

(Problem to be Solved by the Invention) However, since this net-like support member is a fairly wide planar body, it is problematic to attach it to the main body of an internal pressure vessel, etc., which is composed of a flat surface or a curved surface with a large radius of curvature. However, the corner portion where the flat surface or curved surface intersects, or the tip portion when lining both the front and back surfaces,
Or, it is not suitable for installation at the joint end that will be joined to other components after split construction.

For this reason, lining tends to be installed at corners of internal pressure vessels and the like without a suitable support member, which poses a problem of preventing the lining material from falling off.

Furthermore, at the tip of the internal pressure vessel, etc., an end plate is attached to the mesh support member and the shell surface along the edge surface of the shell so as to close the open cut portion of the mesh support member, and the mesh support member is covered with a lining material. Covered. However, since this end plate has a poor ability to support the lining material, the end plate itself is not covered with the lining material. As a result, the end plates left exposed suffered severe wear and tear, which also had an adverse effect on the lining structure of the adjacent main body parts.

Furthermore, in cases where it is to be joined to other constituent parts after construction due to process constraints, or when an internal pressure vessel or the like is manufactured in sections due to its long length and then joined, a support member is especially provided at the joint end. The structure of the joint is that the end plates are in contact with each other, so there is not only wear due to exposure but also warping due to thermal expansion. This causes the lining material to often peel off and fall off.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a lining structure that can efficiently and reliably perform lining treatment at the tip, corner, and joint end of an internal pressure vessel, etc., and has excellent durability.

(Means for Solving the Problems) As explained below using the reference numerals in the attached drawings, the wear-resistant refractory lining structure for internal pressure vessels, etc. of the present invention is composed of a flat surface or a curved surface with a large radius of curvature. In the main body part 10 of the internal pressure vessel etc., the main support member 6 consisting of strip plates arranged at predetermined intervals, strip plates connected in a net shape, etc. is attached to the shell surface, while the flat surface of the main body part 10 is attached to the shell surface. In corner parts 2 and 3 of an internal pressure vessel or the like where curved surfaces intersect with each other, a sub-support member 5 with an L-shaped cross section 5 and a sub-support member 7 with a dogleg-shaped cross section are attached to the shell surface in accordance with the intersecting angle. At the tip 1 of the internal pressure vessel, etc., a sub-support member 12 with a U-shaped cross section that covers the front and back surfaces and end faces of the shell is fitted and attached, and each component of the internal pressure vessel, etc. that is manufactured separately. At the joining end 4, a sub-supporting member 13 in the form of an elongated plate is attached in contact with the shell surface, and the sub-supporting members 5, 7, 12,
13 together with the main support member 6, the lining material 9
It is embedded within.

Example 1 In the cyclone shown in FIG.
is a flat steel thin strip plate, length 250mm, width 19
mm, and 3 mm thick. The main support member 6 was welded to the shell surface of the curved portion having a large radius of curvature and the flat portion of the main body portion 10 at predetermined intervals and arrangement.

The width support member 12 used for the tip portion 1 is
As shown in the figure, it has a U-shaped cross section and a length of 50 mm.
It is 60mm wide and 3mm thick. The sub-support member 1
2 was fitted onto the tip 1 at 20 mm intervals and welded.

The sub-supporting member 5 used at the corner portions intersecting at right angles has an L-shaped cross section as shown in FIG.
It is 50mm long, 19mm wide, and 3mm thick. The sub-support members 12 were welded to the shell surface of the corner portion 2 at intervals of 20 mm.

As shown in FIG. 4, the sub-support member 7 used at the obtusely intersecting corner portions 3 has a dogleg-shaped cross section, and has a length of 80 mm, a width of 19 mm, and a thickness of 3 mm.
The sub-support members 7 were welded to the corner portions 3 at intervals of 20 mm.

These sub-support members 5, 7, 12 and main support member 6
A monolithic refractory material 9 was lined with a thickness of 25 mm to cover the entire area.

Observations made one year after the start of operation showed that, compared to the conventional method, there was no exposure due to wear of the sub-support member 12 at the tip 1, and the main support member 6, sub-support member 5, and corner parts 2 and 3 were not exposed due to wear. The supporting effect of the lining material 9 was sufficient due to the rational arrangement of the lining materials 7. Furthermore,
Since the lining work was easy, a complete filling effect of the lining material 9 was exhibited, and no peeling or falling off due to the supporting member was observed.

Embodiment 2 FIG. 5 shows a case where the cylindrical internal pressure vessel is long, so it is manufactured by being divided in the longitudinal direction and then joined together. One joint 14 of two adjacent components is formed in a concave shape as shown, and the joint 11 of the other component is formed in a convex shape.

In forming the concave joint part 14 and the convex joint part 11, the length is 50 mm, the width is 19 mm, and
Using a sub-supporting member 13 in the form of a long thin plate with a thickness of 3 mm,
The sub-supporting member 13 is attached to the shell surface of the joint end 4 by 20 mm.
Welded at mm intervals.

In one component, the sub-support member 13
was arranged so as to be set back a certain distance from the end face, and in the other component, the sub-support member 13 was arranged so as to protrude from the end face by this distance.
The monolithic refractory 9 is lined with a thickness of 25 mm,
The construction was performed so that the edge portion on the joining side did not protrude from the edge of the sub-support member 13.

According to the observation results one year after the start of operation, compared to the conventional joining of end plates to each other, since the lining material 9 is joined together, there is no wear due to exposure of the support member, and it is more effective at absorbing thermal expansion. The effect was good, and no peeling or falling off of the lining material 9 was observed.

In addition, the main support member 6 and the sub support members 5, 7, 12,
In order to increase the bonding strength between the main support member 6 and the lining material 9, punching tabs 8, through holes, and notches can be formed in the main support member 6 and the sub support members 5, 7, 12, and 13. As the form No. 6, any known form can be selected and used as appropriate.

(Effects of the Invention) As described above, in the present invention, the main body portion 10 of an internal pressure vessel or the like, which is composed of a flat surface or a curved surface with a large radius of curvature, is connected in the form of strips or nets arranged at predetermined intervals. Main support member 6 consisting of a strip plate etc.
is attached to the shell surface, while the corners 2, 3 of an internal pressure vessel etc. which are not suitable for using the main support member 6.
Now, the sub-support member 5 with an L-shaped cross section and the sub-support member 7 with a dogleg-shaped cross section are attached in contact with the shell surface in accordance with the intersection angle, and the tip part 1 of the internal pressure vessel, etc.
Now, the sub-support member 12 with a U-shaped cross section that covers the front and back surfaces and end faces of the shell is fitted and attached, and the joint end portion 4 of each component of the internal pressure vessel etc. that is manufactured separately is attached.
Now, the elongated plate-shaped sub-support member 13 is attached in contact with the shell surface, and the sub-support members 5, 7, 12, 13 are attached.
is entirely embedded in the lining material 9 together with the main support member 6, making it possible to efficiently install linings at the tip 1, corners 2, 3, and joint ends of internal pressure vessels, etc., which was insufficient in the past. You can definitely do it.

In addition, since each sub-support member is covered with a lining material and the lining material is prevented from falling off by the sub-support member, each sub-support member is accurately protected from wear and thermal damage caused by the fluidized catalyst. This results in a lining structure with excellent durability.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical sectional view of an internal pressure vessel according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the tip of the internal pressure vessel, and FIG. 3 is a corner corner of the internal pressure vessel. FIG. 4 is an enlarged sectional view of a corner, and FIG. 4 is an enlarged sectional view of another corner of the internal pressure vessel. FIG. 5 is an enlarged cross-sectional view of separately manufactured component parts of an internal pressure vessel according to another embodiment of the present invention before joining, and FIG. 6 is an auxiliary support member used at the joint end of the internal pressure vessel. FIG. DESCRIPTION OF SYMBOLS 1... Tip part of internal pressure vessel, 2, 3... Corner part of internal pressure vessel, 4... Joining end part of internal pressure vessel, 6... Main support member, 5... Sub-support member, 7... Sub-support member, 8... Punching tab , 9... Lining material, 10... Main portion of internal pressure vessel, 11... Convex joint, 12... Sub-support member, 13... Sub-support member, 14... Concave joint.

Claims (1)

[Claims] 1. In the main body part 10 of an internal pressure vessel, etc., which is composed of a flat surface or a curved surface with a large radius of curvature, the main support member 6 consisting of strip plates arranged at predetermined intervals or strip plates connected in a net shape is used as a shell. On the other hand, at the corners 2 and 3 of an internal pressure vessel or the like where the flat surfaces and curved surfaces of the main body portion 10 intersect with each other, a sub-support member 5 with an L-shaped cross section is attached in accordance with the intersection angle. The sub-support member 7 with a letter-shaped cross section is attached in contact with the shell surface, and in the tip part 1 of the internal pressure vessel, etc.
At the joint end portion 4 of each component of an internal pressure vessel etc. that is manufactured separately, the sub-support member 12 with a U-shaped cross section that covers the front and back surfaces and end faces of the shell is fitted and attached.
A slender plate-shaped sub-support member 13 is attached in contact with the shell surface, and the sub-support members 5, 7, 12, 13 are entirely embedded in the lining material 9 together with the main support member 6 to provide wear resistance for internal pressure vessels, etc. Fireproof lining structure.