JPS58180871A - Corrosion-resistant cladded end plate for high-pressure container - Google Patents

Abstract

PURPOSE:To avoid such inconveniences as delamination or thinning of a cladding material and lowering of corrosion resistance and obtain an economical end plate, by a method wherein a clad material with a corrosion-resistant cladding material adhered to the inside circumference side thereof is divided into a plurality of end plate pieces, which are welded in an end plate form single-wall pressure-resistant material. CONSTITUTION:The end plate pieces 11a obtained by adhering the corrosion- resistant cladding material 8 to a clad base material 9 and forming the resultant laminate into petal form pieces by cold pressing are placed along the inside circumferential surface of the pressure-resistant material 6a, and while maintaining this condition, side end parts of the end plate pieces 11a are abutted to each other, and butt joint parts 12 are welded. A support plate 14 consisting of the same material as that for the cladding is inserted at each releasable member 13 of the cladding, and is fixed to the cladding materials 8 by tack welds 15. Further, to provide corrosion-resistant reinforcement for the joint parts, straps 16 each of which covers the support plate 14 and the welds 15 and adhered to the inside surfaces of the cladding materials 8, and are jointed to the cladding materials 8 by fillet welds 17.

Description

[Detailed description of the invention] The non-explosion is related to the corrosion resistance of the head plate under high pressure of 6 degrees, and in particular, the corrosion resistance of the plate is poor in corrosion resistance, and the stability is such that there is no risk of thinning of the coated plywood or #1 #1 m. Adjust on a mirror plate.

One reason is that in the case of vessels that are exposed to high pressure, such as the original car synthesis tower or the ethanol compound, the corrosion resistance of the ball-shaped m plate provided at the upper F end is questionable.

Loose cooking etc. are acceptable. This is urea synthesis 4
During operation, the temperature inside the container becomes high and the outer shell becomes
Heat between the pressure member and the inner corrosion-resistant liner subjected to IJt411
! Since a liner made of titanium or the like has a smaller engagement, dAt is generated between the two, and the inner pressure causes the liner to stretch due to the separation, creating a large stress in the liner material.

Also, when it is turned on, the liner side is cooled down by 4 degrees, and the pressure resistance is 11! Since the cooling of l is delayed, both 4
As the distance between the lines of Corrosion resistance of 14fi is applied to the end plate under such high pressure.
- To do this, as shown in the conventional filDg, a corrosive resistant til with a leather thickness corresponding to the internal pressure is added in an integral tlL shape or by welding to form a head plate, or as shown in Fig. The pressure-resistant base material I21 is clad with a corrosion-resistant composite material (3), and the composite material I31 is peeled off by a certain distance at each seam, and a scrap board (4 ), and the above-mentioned peeling il! By covering the portion, the inside of the container is completely surrounded by the award-resistant column material. However, among these measures,
For the former, use a thick plate made of high 1lII ★ resistant material! For the latter, the flat cladding material is hot pressed into a spherical #IC shape, and the welded part of the cladding base material is annealed to relieve stress. must be given. Therefore, during thermal molding, the clad composite material not only becomes rough due to heat and loses corrosion resistance, but also the adhesion ρ1 of the clad decreases, causing thinning such as peeling and thinning of the clad material.

Therefore, one object of the present invention is to solve the problems inherent in the corrosion-resistant structure of the conventional high-pressure pressure vessel as described above.
The gist of the parrot is that the pressure resistance r:
Corrosion-resistant composite material is pasted on the inner circumference of the inner curved surface of the F goods, and the corrosion-resistant composite material is pasted on the inner circumferential side of the high-pressure pressure device made by dividing and welding the nine-cut material into compound Ill pieces. It's on the board.

In the continuation I, the Teishi Hei that embodies the present invention will be explained in detail with reference to the identification drawings shown in Figures 3 and 3.

3rd L here)! 3 is a knee diagram showing the a-kaji of the mirror plate, which is Seiichi Issada of this #1 example, and Figure 4 is the A of 8 in Figure 3.
Enlarged top view of Miyako, No. 5 # AFi, showing other gM construction @
llL diagram and FIG. 6 are collapsed cross-sectional views of the entire urea synthesis tower using the head plate according to the present invention.

A part of the present invention consists of a pressure-resistant material that forms the outer shell of the end plate, and a cladding material to which a corrosion-resistant composite material is pasted to improve the benign properties. −
It has a structure of 1.

MIJ et al.'s pressure-resistant material is hot-formed by pressing a plate (6) shown in Fig. 13 into a bowl-shaped end plate (6λ) using a press machine.

In the case of a similar Ilm diameter, which is so large that it cannot be accommodated in a single IN plate, a part of the spherical shell may be used.
A solid pressure-resistant material (6c) may be manufactured by forming the li&piece (6b) into a double Ik#IL type and welding the ends (17).

There are two possible ways to sew the crud material, either by attaching the crud material to the mirror plate-like pressure resistance 6t (<1) or (6C) of the #1 hardened steel.

That is, the first method is to attach a corrosion-resistant composite material such as titanium or zirconicum to the comparative clad base material (9), and to
(toc).

(lad) were separated by I8j from each other to expose the cladding base material at that part. After molding into mirror plate pieces (11 m) separated into petal shapes by cold grouting, this 11!1 mirror plate pieces (IIJI) are aligned along the inner circumferential surface of the above pressure-resistant material (a) or (6C) and abutted against each other at their side ends, and the butt ends, iJ , d, ... is the clad base metal phase! i1
- and between the clad ## goods and the pressure-resistant material! come into contact with In this state, each mirror plate piece (11, (ll, -R lfn
<6') * Since it is necessary to weld closely to the inner circumference of the spherical shape of (6C), the outer # of each mirror plate piece! The 11th surface and the inner circumferential direction of the pressure-resistant material are processed with +IA carpet so that they have the same -1 half radius. Thus ill plate (Ilm), (lla)
,... were placed at the joints of each cladding material by tightly tightening them to the inner circumferential surface of the pressure-resistant material (6a) or (6C), and tapping them as shown in Figures 3 and 4. Insert the clad composite material and the lining lkj made of the same material into the peeled part of the cut-out joint described in lIJ, iJ+JJI... and tack weld (to) the composite material, 8).

, meet with the group. The welding thickness of this tack S welding is set to half the thickness of the clad composite material -) in order to prevent the base metal from melting due to S heat. In this way, when the joining of 14 pieces of composite material is completed, the corrosion resistance of this joint part is 1IA.
This board 1 is used to remove the scrap board and the welded part in order to perform ljll.
Attach e to the inner surface of the composite material and join it to the composite material, dl, , t$1 by η that contacts the uneven thickness. After filling it up and lit, I will F& base the 14th clad material using the #I board and the backing board, but it is 45b! In the second method shown in A, the mirror plate pieces (llllk) formed into petal-like pieces of wood by cold pressing are pressed together to form a hemispherical shape as shown in -. on 11
The outer surface #1.4 is machined into a smooth spherical L shape, and the inner surface of the Rinku pressure-resistant It (6a) or Vi (6C) is also machined with a hemispherical shape. Insert the cut FJL-shaped cow sphere till into the machine EL, pressure-resistant material (61) and Fi (60) along the JJI direction, and insert the upper end 1 of the hemisphere.
A single fist withstand pressure R (6! l) and F! (6C) tr+az welding inside the upper jaw part is constant. Naturally, the hemisphere till
into a blind made by welding.

Similarly to the above, connect the 14 pieces of clad material facing inward using the scrap board and the backing board.

No matter which of the above-mentioned forming methods is used, in the end, the inside of this pressure-resistant material is molded into a mirror plate-like heavy and double pressure-resistant material (6a) or (6C) with a thickness of 9 mm depending on the internal pressure that is the object of the present invention. A mirror plate piece (1xa), (xta) is made of a clad material with an outer curved surface that follows the circumferential shape and a corrosion-resistant composite material is pasted on the inner circumferential side.
, -... The #H1 high-pressure pressure vessel end plate made of corrosion-resistant cladding was obtained.

Such end plates are used in the head portions of high-pressure vessels that handle corrosive fluids, such as the bottom head portion of urea synthesis towers, the upper portions of ethanol synthesis towers, and the head portions of ethanol synthesis towers. Fig. 6 shows a case in which the corrosion-resistant end plate of the present invention is used in the IF section head A of such a urea synthesis tower.
The sulfuric acid gas, liquid ammonia, and unreacted urea liquid injected from the three inlet pipes 4°J, l/) (only the end of the pipe is shown) through the henosul 1 in the head of section F are transferred to one reaction column. The urine is taken out as a liquid from the upper head 4 through the cylindrical v-6 part leakage, A, -.

As described above, the present invention has a thickness that corresponds to the internal pressure! It
The gist is that the clad material, which has an outer curved surface that follows the circular curved surface of the pressure-resistant material and a corrosion-resistant composite material is pasted on the inner circumferential side, is separated and welded into the mirror plate pieces of A. Since it is a corrosion-resistant clad gM end plate for high-pressure pressure vessels, there is no need to use expensive single-circle corrosion-resistant materials as pressure-resistant materials. Since the cladding and load-bearing Jlt are knitted with the pressure-resistant Ill plate behind it, there is no need to consider pressure resistance, so a comparatively thinner cladding material can be used for bundling and hot bonding. Since there is no need to perform forming or shaping, there is no problem of separation or thinning of the clad composite material, or a decline in corrosion resistance.
It exhibits excellent pressure and corrosion resistance for the first time.

[Brief explanation of the drawing]

Figures 1 and 2 show a conventional pressure-resistant and corrosion-resistant end plate. Figure 1 shows a plate made of a thick plate made of corrosion-resistant material, and Figure 2 shows a base material made of pressure-resistant material. #ll The whole #1 is made by the 4th place clad material that forms the 4th place, and the next 4 lines, Figure 983, is an L process diagram showing one piece of the end plate made of one piece of one piece.
Figure 4 is an enlarged upward view of A in Figure 3, Figure 5 is
Fig. 14iL and Fig. 6 showing other manufacturing processes are 11i1 mountain views of the entire urine translation tower using the mirror plate according to the present invention. 6 ” * 6 '...-Plate-shaped vehicle pressure-resistant material, 19--
・Outward direction 1 (outer periphery), 8...Resistance-resistant composite material 11A
d plate piece, 9...Kuturad base material% 13...Tai 1I1
1 part, 14... scrap board, 16... final board. Yama-jin Representative of the Kobe Seisaku ill office
Patent Attorney Bukaku Honjo 11!1 Figure 2 Figure 4 Figure 6 Figure 6 230' Figure 5

Claims (1)

[Scope of Claims] 1. A 4i mirror plate piece is made of a clad material in which a mirror plate-like single wall pressure-resistant material has a circular curved surface along the inner ridge of the pressure-resistant material and a corrosion-resistant composite material is pasted on the inner circumferential side. High pressure pressure 8+1 characterized by dissection and S contact! A mirror plate made of corrosion-resistant hardwood. 2. The cladding base material of the mirror plate pieces is made of pressure-resistant material, and a scrap board made of the same material as the composite material is inserted into the peeled part of the composite material provided at the seam of each mirror plate piece, and the All of the scrap board is Special feature for welding the clad plate to the composite material and welding the 14 pieces of the cladding.
! Prisoner examination.