CN219045930U

CN219045930U - Detachable jacket structure of zirconium heat exchanger

Info

Publication number: CN219045930U
Application number: CN202223317842.9U
Authority: CN
Inventors: 马一鸣; 常春梅; 马云霖; 王海波; 孙海生; 郝开开; 向凯; 魏业奇; 于啸; 姚炜莹; 齐兴
Original assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanpec Technologies Ltd
Current assignee: Shanghai Lanbin Petrochemical Equipment Co Ltd; Lanpec Technologies Ltd
Priority date: 2022-12-09
Filing date: 2022-12-09
Publication date: 2023-05-19
Anticipated expiration: 2032-12-09

Abstract

The utility model discloses a detachable jacket structure of a zirconium heat exchanger, and relates to the technical field of zirconium heat exchangers. The sealing structure comprises a sealing ring, an inner cylinder body is arranged in the outer cylinder body, an inner cylinder body connecting pipe is welded on the surface of the inner cylinder body, a packing box is arranged at the upper end of the sealing ring, a packing cavity is arranged between the packing box and the inner cylinder body connecting pipe, a circular ring, a graphite packing and a packing gland are sequentially arranged in the packing cavity from bottom to top.

Description

Detachable jacket structure of zirconium heat exchanger

Technical Field

The utility model relates to the technical field of zirconium heat exchangers, in particular to a detachable jacket structure of a zirconium heat exchanger.

Background

Zirconium is widely used in process equipment important in the acetic acid and pesticide industries at present. Zirconium has excellent corrosion resistance to many strong corrosive mediums, has good heat conductivity, mechanical property and technological property, greatly improves the service life and reliability of equipment, and is gradually applied to the heat exchanger field of the strong corrosive mediums such as acetic acid, pesticide industry and the like along with the rapid development of the chemical industry.

From the purpose of saving zirconium materials, all materials of the connecting pipe flange of the zirconium heat exchanger and materials which are not in direct contact with corrosive process media are selected as far as possible from carbon steel. Because zirconium and steel cannot be welded, stuffing box sealing is adopted when two members made of different materials are required to be sealed, and zirconium is extremely easy to absorb and combine with nitrogen, oxygen, hydrogen and the like in air at high temperature. In order to reduce adverse effects caused in mechanical properties and corrosion properties, zirconium is used for protecting welding seams from the front side and the back side by using high-purity inert gas when welding is carried out, and is a key for ensuring the quality of the welding seams.

In order to adapt to the whole manufacturing procedure of the heat exchanger, the welding of the inner cylinder connecting pipe and the inner cylinder is generally carried out after the inner cylinder is arranged in the outer shell, an inner groove is generally adopted for the connecting pipe with the nominal diameter larger than 450, a welding operator needs to enter the connecting pipe for internal welding, and certain difficulties still exist for external protection and detection of welding seams, and when the nominal diameter of the connecting pipe is smaller than 400, the use of the zirconium heat exchanger structure is limited due to the limited operation space.

Disclosure of Invention

The utility model aims to provide a detachable jacket structure of a zirconium heat exchanger, which solves the technical problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a can dismantle jacket structure of zirconium heat exchanger, includes interior barrel, shell body, pressure chamber and seal structure, seal structure is located between interior barrel and the shell body, seal structure includes sealing ring, sealing ring and shell body welding are as an organic whole, the inside interior barrel that is provided with of shell body, interior barrel surface welding has interior barrel to take over, sealing ring upper end is provided with the packing box, be provided with the packing chamber between packing box and the interior barrel to take over, packing chamber is inside from having set gradually ring, graphite packing and gland from last down.

Preferably, the packing box is provided with a fastening assembly in a penetrating manner, the packing box is detachably connected with the sealing ring through the fastening assembly, and a gasket is arranged between the lower end of the packing box and the upper end of the sealing ring.

Preferably, the packing gland is L-shaped and is connected with the packing box through bolts.

Preferably, a loose flange is arranged on the surface of the inner cylinder connecting pipe.

Preferably, the pressure chamber is located between the outer housing and the inner housing.

Preferably, the graphite packing is woven into rope-shaped packing by the expanded graphite composite fiber material through mechanical processing, the rope-shaped packing has the advantages of no embrittlement and aging at low temperature, no softening and decomposition at high temperature, good flexibility, arbitrary winding and bending, good corrosion resistance, and radial contact type packing sealing, and the axial compression deformation of the graphite packing is generated by the axial compression force formed by the packing gland of a screw bolt, and the graphite packing is blocked by a circular ring, so that the packing generates radial expansion trend, the axial force is converted into radial force, and the expansion of the packing is limited by the inner wall and the outer wall of a packing cavity, so that the packing is tightly attached to two surfaces, and the flow of fluid along the surface of a shaft is blocked, thereby forming radial sealing effect.

Compared with the related art, the detachable jacket structure of the zirconium heat exchanger has the following beneficial effects:

1. the external welding space for connecting the connecting pipe with the inner cylinder body is created in the manufacturing process through the arrangement of the sealing ring;

2. the sealing ring and the stuffing box are sealed by the fastener to realize a detachable connection structure, so that the welding seam between the sealing ring and the outer shell is convenient for implementing specific detection, and the welding seam between the inner barrel connecting pipe and the inner barrel is convenient for maintenance;

3. by the structural design of the stuffing box, complex distribution and larger stress generated at the root of the connecting pipe when the temperature difference between the outer shell and the inner barrel is larger are avoided, the temperature difference fluctuation resistance of the equipment is improved, and the safety and the reliability are improved;

4. compared with the connection modes of transition welding of a composite layer, silver brazing and the like, the packing box with the detachable jacket structure realizes sealing, and solves the problem that the connection and sealing between an inner cylinder body made of titanium, zirconium or other titanium group metals and a steel outer shell body are difficult;

5. the utility model has the advantages of relatively simple structure, convenient processing and manufacturing, safety and reliability, can be used for avoiding the direct welding of the zirconium inner cylinder body and the steel part in the processing of the zirconium heat exchanger structure, can be used for sealing among components with poor weldability of dissimilar metal materials, has better economy, and can be used for the detachable jacket structure when the inner cylinder body manufactured by titanium, zirconium or other titanium group metals cannot be directly welded with the steel outer shell.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of a stuffing box according to the present utility model;

fig. 3 is an enlarged view of the structure of fig. 2 a according to the present utility model.

In the figure: 1. the sealing device comprises an inner cylinder body, 2, an outer shell body, 3, a sealing ring, 4, a gasket, 5, a fastening component, 6, a stuffing box, 7, an inner cylinder body connecting pipe, 8, a stuffing gland, 9, a graphite packing, 10, a circular ring, 11, a pressure cavity, F1, a corrosive medium flow path, F2 and a heating medium flow path.

Detailed Description

Examples:

referring to fig. 1-3, the present utility model provides a technical solution, including an inner cylinder 1, an outer shell 2, a pressure chamber 11 and a sealing structure, wherein the sealing structure is located between the inner cylinder and the outer shell 2, the sealing structure includes a sealing ring 3, the sealing ring 3 and the outer shell 2 are welded into a whole, the inner cylinder 1 is disposed inside the outer shell 2, an inner cylinder connecting tube 7 is welded on the surface of the inner cylinder 1, a packing box 6 is disposed at the upper end of the sealing ring 3, a packing chamber is disposed between the packing box 6 and the inner cylinder connecting tube 7, a ring 10, a graphite packing 9 and a packing gland 8 are sequentially disposed inside the packing chamber from bottom to top, a fastening assembly 5 is disposed through the packing box 6, the packing box 6 is detachably connected with the sealing ring 3 through the fastening assembly 5, a gasket 4 is disposed between the lower end of the packing box 6 and the upper end of the sealing ring 3, the packing gland 8 is in an L-shape and is connected with the packing box 6 by bolts, a loose flange is mounted on the surface of the inner cylinder connecting tube 7, and the pressure chamber 11 is located between the outer shell 2 and the inner cylinder 1.

The utility model has the advantages of relatively simple structure, convenient processing and manufacturing, safety and reliability, can be used for avoiding the direct welding of the zirconium inner cylinder body and the steel part in the processing of the zirconium heat exchanger structure, can be used for sealing among components with poor weldability of dissimilar metal materials, has better economy, and can be used for the detachable jacket structure when the inner cylinder body manufactured by titanium, zirconium or other titanium group metals cannot be directly welded with the steel outer shell;

the external welding space for connecting the connecting pipe with the inner cylinder body is created in the manufacturing process through the arrangement of the sealing ring;

the sealing ring and the stuffing box are sealed by the fastener to realize a detachable connection structure, so that the welding seam between the sealing ring and the outer shell is convenient for implementing specific detection, and the welding seam between the inner barrel connecting pipe and the inner barrel is convenient for maintenance;

by the structural design of the stuffing box, complex distribution and larger stress generated at the root of the connecting pipe when the temperature difference between the outer shell and the inner barrel is larger are avoided, the temperature difference fluctuation resistance of the equipment is improved, and the safety and the reliability are improved;

compared with the connection modes of transition welding of a composite layer, silver brazing and the like, the packing box with the detachable jacket structure realizes sealing, and solves the problem that the connection and sealing between the inner cylinder body made of titanium, zirconium or other titanium group metals and the steel outer shell body are difficult.

Claims

1. A detachable jacket structure of a zirconium heat exchanger is characterized in that: including interior barrel (1), shell body (2), pressure chamber (11) and seal structure, seal structure is located between interior barrel and the shell body (2), seal structure includes seal ring (3), seal ring (3) and shell body (2) welding are as an organic wholely, shell body (2) inside is provided with interior barrel (1), interior barrel (1) surface welding has interior barrel to take over (7), seal ring (3) upper end is provided with packing box (6), be provided with the packing chamber between packing box (6) and the interior barrel to take over (7), packing chamber inside has set gradually ring (10), graphite packing (9) and gland (8) from last down.

2. The removable jacket structure of a zirconium heat exchanger of claim 1, wherein: the packing box (6) is provided with a fastening component (5) in a penetrating mode, the packing box (6) is detachably connected with the sealing ring (3) through the fastening component (5), and a gasket (4) is arranged between the lower end of the packing box (6) and the upper end of the sealing ring (3).

3. The removable jacket structure of a zirconium heat exchanger of claim 2, wherein: the packing gland (8) is L-shaped and is connected with the packing box (6) through bolts.

4. A removable jacket structure for a zirconium heat exchanger as in claim 3, wherein: the surface of the inner cylinder connecting pipe (7) is provided with a loose flange.

5. The removable jacket structure of a zirconium heat exchanger of claim 4, wherein: the pressure cavity (11) is positioned between the outer shell (2) and the inner cylinder (1).