CN201524557U

CN201524557U - Whole multi-layer sandwich type urea reactor

Info

Publication number: CN201524557U
Application number: CN2009201870321U
Authority: CN
Inventors: 孙国梁
Original assignee: Anhui Sixon Cryo Co Ltd
Current assignee: Anhui Sixon Cryo Co Ltd
Priority date: 2009-08-20
Filing date: 2009-08-20
Publication date: 2010-07-14
Anticipated expiration: 2019-08-20

Abstract

The utility model relates to a whole multi-layer sandwich type urea reactor which can solve the problem of the existing urea reactor that the inner tube comprises a deep thick cirumferential weld. The urea reactor comprises an upper seal head, a lower seal head and more two shell rings, wherein each shell ring comprises a stainless steel linear layer and a blind layer with a leak detection groove and the thickness of the stainless steel linear layer is 8mm and the thickness of the blind layer with the leak detection groove is 6mm; an intensity layer is arranged at the outer side of the blind layer of each shell ring and its thickness is 12mm and the thickness of the wall of the shell ring is 26mm and the shell rings are welded together and two ends of the shell rings are respectively welded with the upper seal head and the lower seal head to form a whole inner tube; a layer plate of more three layers is welded on the outer side of the inner tube. The whole multi-layer sandwich type urea reactor prevents deep thick circumferential weld and does not easily generate defects, wherein the defects extend along the wall thickness direction but not connect; the tube stress distribution along the wall thickness distribution is uniform, the stress state is relatively better with features of only leakage no explosion and more reliable safety performance.

Description

Integral multi-layered clamped-in style urea synthesizer

Technical field

The utility model belongs to urea production equipment, is specifically related to a kind of urea synthesizer inner core.

Background technology

Urea synthesizer is the key equipment of urea plant, and it is by pressure cylinder, dome head and stainless steel lining nexine and internal process column plate etc. are formed up and down.Existing urea synthesizer, the manufacture of its pressure cylinder adopts laminated board dressing type, with its stainless steel lining nexine (δ=8, the 316Lmod material) and blind layer (δ=6 of band leak detection groove, the 16MnR material) directly make inner core, outside wrapping laminate (δ=12+13 * 8,16MnR material) is made shell ring, the shell ring gross thickness is 130mm, and shell ring and shell ring link with deep girth joint then.Such manufacture craft labour intensity is big, and production efficiency is low, and stock utilization is low, and pressure cylinder has deep girth joint, causes the bigger stress in commissure to concentrate, and has influenced the security reliability that product uses.

Summary of the invention

Have the problem of deep girth joint in order to solve existing urea synthetic tower inner core, the utility model provides a kind of integral multi-layered clamped-in style urea synthesizer inner core.

Concrete architecture advances technical scheme is as follows:

Integral multi-layered clamped-in style urea synthesizer comprises upper cover, low head and the above shell ring of two joints, described every joint shell ring comprises the blind layer of stainless steel lining nexine and band leak detection groove, described stainless steel lining layer thickness is 8 millimeters, and the blind layer thickness of described band leak detection groove is 6 millimeters;

The blind layer outside of described every joint shell ring is provided with the intensity layer, and described intensity bed thickness is 12 millimeters, and the intensity layer material is 16 manganese container panel (16MnR).The wall thickness of every joint shell ring is 26 millimeters;

Be welded to connect between the shell ring more than described two joints, the above shell ring two ends of two joints are welded to connect upper cover respectively and low head is formed whole inner core;

The outside wrapping of described inner core is welded to connect the laminate more than three layers.

Welding Structure between described upper cover and the laminate more than three layers is a trapezium structure, and the Welding Structure between low head and the laminate more than three layers is a trapezium structure.

Described 78 degree that respectively stagger mutually between the axial weld seam of plate layer by layer.

The adjacent laminate longitudinal seam of described identical layer stagger successively 180 the degree; The longitudinal seam of blind layer and the stainless steel lining nexine longitudinal seam 20-30 millimeter that staggers.

Useful technique effect of the present utility model is embodied in the following aspects:

1, to become a shell ring by the three-ply plate assembly welding earlier be blind layer (δ=6,16MnR material) and the intensity layer (δ=12,16MnR material) of stainless steel lining nexine (δ=8,316Lmod material), band leak detection groove for inner core of the present utility model.Then, shell ring and shell ring, shell ring and up and down the dome head assembly welding form a whole inner core.Whole inner core is through after the assay was approved, and on inner core, vertical, the girth joint of laminate stagger employing clamping mechanical hand mutually, do not have deep girth joint with the successively whole wrapping of laminate.Welding is difficult for producing defective and defective does not connect along the expansion of wall thickness direction, has avoided the welding of big thickness, and flaw detection and heat treatment have improved production efficiency widely.

2, behind the whole inner core outsourcing laminate of employing, change radially wrapping and clamp, make interlamellar spaces littler for tangential.And utilize the feature of frictional force between laminate, and can reduce requirement to the laminate weld seam, improved the margin of safety of container again.

3, first layer plate longitudinal seam in the wrapping process, back weld-ring weld seam is even the contraction laminate of longitudinal seam further is adjacent to, again the interior-layer layer plate is produced certain pretightning force, barrel stress distributes even along Thickness Distribution, and force-bearing situation is preferable, have the only not quick-fried characteristics of leakage, more reliable security performance is arranged.

4, the lightest, the low cost of manufacture of weight in stock utilization height, wide, the similar container of selection.

5, manufacturing process advanced person, the mechanization degree height.Laminate clamping device flexible operation can be done field fabrication to great diameter and long equipment especially, has solved the problem of main equipment transportation difficulty.

Description of drawings

Fig. 1 is the utility model structural representation,

Fig. 2 is the A-A cutaway view of Fig. 1,

Fig. 3 is Fig. 1's " I " enlarged drawing,

Fig. 4 is the laminate girth joint distribution schematic diagram more than three layers,

Fig. 5 is that the back structure chart is welded with upper cover and low head respectively in the above shell ring two ends of two joints.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment:

Referring to Fig. 1, integral multi-layered clamped-in style urea synthesizer comprises upper cover 1, low head 5 and the above shell ring of two joints, every joint shell ring comprises the blind layer 3 of stainless steel lining nexine 2 and band leak detection groove, and the stainless steel lining layer thickness is 8 millimeters, and the blind layer thickness of band leak detection groove is 6 millimeters; Blind layer 3 outside welding of every joint shell ring is provided with intensity layer 4, and intensity layer 4 is thick to be 12 millimeters, and the intensity layer material is 16 manganese container panel (16MnR), and total wall thickness of every joint shell ring is 26 millimeters;

Be welded to connect between the shell ring more than two joints, the above shell ring two ends of two joints are welded to connect upper cover 1 respectively and low head 5 is formed whole inner core, see Fig. 5; The wrapping of the inner core outside is welded to connect the laminate 6 more than three layers.

Each 78 degree that stagger mutually between the axial weld seam of plate layer by layer, the adjacent laminate longitudinal seam of identical layer 180 degree that stagger successively; The longitudinal seam of blind layer and the stainless steel lining nexine longitudinal seam 20-30 millimeter that staggers is seen Fig. 2 and Fig. 4.Welding Structure between upper cover 1 and the laminate more than three layers 6 is a trapezium structure, and the Welding Structure between low head 5 and the laminate more than three layers 6 is a trapezium structure, sees Fig. 3.

Stainless steel lining nexine 2 volumes are welded into a shell ring, and shell ring is of a size of Φ 1400 * 8 * 2370 (interior diameter * thickness * length, millimeter).In order to prevent the shell ring distortion, two supports of device and stretching in shell ring.Then prick the blind layer (thickness is 6 millimeters) of one deck band leak detection groove in the outsourcing of stainless steel shell ring.Then, wrapping one deck intensity layer (thickness is 12 millimeters) outside blind layer.Shell ring gross thickness after the wrapping is 26 millimeters.At last, some shell rings and upper and lower dome head assembly welding are become integral multi-layered clamped-in style urea synthesizer inner core, as shown in Figure 5; Shell ring and shell ring, shell ring and upper and lower dome head are welded to form a whole inner core, and whole inner core is through after the assay was approved, and on inner core, vertical, the girth joint of laminate stagger employing clamping mechanical hand mutually, do not have deep girth joint with the successively whole wrapping of laminate; Just make integral multi-layered clamped-in style urea synthesizer pressure cylinder.

Claims

1. integral multi-layered clamped-in style urea synthesizer, comprise upper cover, low head and the above shell ring of two joints, described every joint shell ring comprises the blind layer of stainless steel lining nexine and band leak detection groove, described stainless steel lining layer thickness is 8 millimeters, the blind layer thickness of described band leak detection groove is 6 millimeters, it is characterized in that:

The blind layer outside of described every joint shell ring is provided with the intensity layer, and described intensity bed thickness is 12 millimeters, and the intensity layer material is 16 manganese container panel; The wall thickness of every joint shell ring is 26 millimeters;

2. integral multi-layered clamped-in style urea synthesizer according to claim 1 is characterized in that: the Welding Structure between described upper cover and the laminate more than three layers is a trapezium structure, and the Welding Structure between low head and the laminate more than three layers is a trapezium structure.

3. integral multi-layered clamped-in style urea synthesizer according to claim 1 and 2 is characterized in that: described 78 degree that respectively stagger mutually between the axial weld seam of plate layer by layer.

4. integral multi-layered clamped-in style urea synthesizer according to claim 1 and 2 is characterized in that: the adjacent laminate longitudinal seam of described identical layer stagger successively 180 the degree; The longitudinal seam of blind layer and the stainless steel lining nexine longitudinal seam 20-30 millimeter that staggers.