CN219103769U

CN219103769U - Vertical high-efficiency tube-winding heat exchanger for large-temperature-difference heat exchange

Info

Publication number: CN219103769U
Application number: CN202223217945.8U
Authority: CN
Inventors: 徐建忠; 高毅; 康康; 彭旭东; 谢伟; 金蒙蒙; 洪珊
Original assignee: Hang Yang Group Co ltd
Current assignee: Hang Yang Group Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-05-30
Anticipated expiration: 2032-12-02

Abstract

The utility model provides a vertical high-efficient heat exchanger around pipe for big difference in temperature heat transfer, it includes center tube and casing group, the center tube support is established in the backup pad, and this backup pad welding is inboard at the casing, and this center tube comprises center tube, center tube upper cover, center tube lower cover respectively, and wherein center tube upper cover and center tube lower cover are connected with upper connecting pipe and lower connecting pipe respectively to be provided with the coupling on upper connecting pipe and the lower connecting pipe respectively, upper and lower two coupling pass through the heat transfer union coupling of winding on center tube, upper end and the lower extreme of upper connecting pipe still are provided with upper reduction and lower reduction respectively. The utility model solves the problem of cracking leakage risk brought by the temperature difference stress generated by large temperature difference to the aluminum plate-fin heat exchanger, and has the advantages of good heat effect, compact structure, temperature compensation capability and the like.

Description

Vertical high-efficiency tube-winding heat exchanger for large-temperature-difference heat exchange

Technical Field

The utility model relates to heat exchange equipment, in particular to a vertical high-efficiency tube-winding heat exchanger for large-temperature-difference heat exchange, and belongs to the technical field of heat exchange equipment.

Background

The heat exchange equipment in the cold box of the air separation device generally uses an aluminum plate-fin heat exchanger, and belongs to a dividing wall type heat exchanger. The heat exchanger with the structure exchanges heat by two or more fluids, and a heat transfer temperature difference exists in each section of the fluid flow direction. According to the characteristics of manufacturing process, material performance and the like, relevant standards prescribe that the maximum temperature difference of the heat exchanger is not more than 30K. Once this temperature difference is exceeded, the risk of the heat exchanger being pulled apart is greatly increased. The heat exchange equipment in the cold box is buried by the pearlites, so that faults are not easy to find, and the overhaul cost is high. The leaked cryogenic medium greatly increases the operational risk of the entire air separation plant.

Therefore, the heat exchanger with large temperature difference adopts a coiled tube heat exchanger to avoid the problem, improves the reliability of system operation, and designs a vertical high-efficiency coiled tube heat exchanger for large temperature difference heat exchange.

Disclosure of Invention

The utility model aims to overcome the defects, solve the cracking leakage risk brought by the temperature difference stress generated by large temperature difference to the aluminum plate-fin heat exchanger, and provide the vertical type efficient tube-wound heat exchanger for large temperature difference heat exchange, which has the advantages of good heat effect, compact structure and temperature compensation capability.

The utility model aims at being completed by the following technical scheme: the utility model provides a vertical high-efficient heat exchanger around pipe for big difference in temperature heat transfer, it includes center tube and casing group, the center tube support is established in the backup pad, and this backup pad welding is inboard at the casing, and this center tube comprises center tube, center tube upper cover, center tube lower cover respectively, and wherein center tube upper cover and center tube lower cover are connected with upper connecting pipe and lower connecting pipe respectively to be provided with the coupling on upper connecting pipe and the lower connecting pipe respectively, upper and lower two coupling pass through the heat transfer union coupling of winding on center tube, upper end and the lower extreme of upper connecting pipe still are provided with upper reduction and lower reduction respectively.

As preferable: the shell is respectively connected with the upper end socket and the lower end socket, the formed closed cavity is used for positive fluid, a positive flow inlet connecting pipe is arranged at the position close to the upper end of the shell, a positive flow outlet connecting pipe is arranged at the position close to the center of the lower end socket, positive fluid is conveniently discharged, through holes are formed in the middle positions of the upper end socket and the lower end socket, and the through holes are respectively used for penetrating the upper connecting pipe and the lower connecting pipe.

As preferable: and a separation plate is further arranged in the lower connecting pipe and used for separating cold and hot ends of the reflux fluid.

As preferable: the outside of casing still sets up the support for the installation of equipment.

Compared with the prior art, the utility model has the following technical effects: firstly, the heat exchange effect is ensured; secondly, the fluid in the heat exchange equipment is uniformly distributed; thirdly, the dilemma of cracking the aluminum plate-fin heat exchanger caused by temperature difference stress generated by large temperature difference is solved; and fourthly, canceling the fixed tube plate structure and adopting a plurality of tube joints to be connected with the heat exchange tubes.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Detailed Description

The utility model will be described in detail below with reference to the attached drawings: as shown in fig. 1, the vertical high-efficiency tube-winding heat exchanger for large-temperature-difference heat exchange comprises a central tube and a shell, wherein the central tube is arranged on a supporting plate 8 in a supporting plate 8, the supporting plate 8 is welded on the inner side of the shell, the central tube is respectively composed of a central tube 16, a central tube upper end socket 6 and a central tube lower end socket 9, wherein the central tube upper end socket and the central tube lower end socket are respectively connected with an upper connecting tube 5 and a lower connecting tube 15, tube connectors 4 are respectively arranged on the upper connecting tube 5 and the lower connecting tube 15, the upper tube connector 4 and the lower tube connector 4 are connected through a heat exchange tube 7 wound on the central tube 16, and an upper shrinkage joint 1 and a lower shrinkage joint 13 are respectively arranged at the upper end and the lower end of the upper connecting tube.

The shell 10 is respectively connected with the upper end enclosure 2 and the lower end enclosure 12, a formed closed cavity is used for forward fluid, a forward flow inlet connecting pipe 3 is arranged at the position close to the upper end of the shell 10, a forward flow outlet connecting pipe 14 is arranged at the position close to the center of the lower end enclosure 12, forward fluid is conveniently discharged, through holes are formed in the middle positions of the upper end enclosure 2 and the lower end enclosure 12, and the through holes are respectively used for penetrating the upper connecting pipe 5 and the lower connecting pipe 15.

The lower connecting pipe 15 is also provided with a partition plate 11 for separating the cold and hot ends of the reverse flow fluid.

The outside of the housing 10 is also provided with a support 17 for the installation of the device.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Referring to fig. 1, the utility model provides a vertical high-efficiency tube-wound heat exchanger suitable for large-temperature-difference heat exchange. Firstly, a central cylinder 16 is respectively connected with a central cylinder upper end socket 6 and a central cylinder lower end socket 9, and an upper connecting pipe 5 and a lower connecting pipe 15 are respectively arranged on the central cylinder upper end socket 6 and the central cylinder lower end socket 9; the pipe joint 4 is provided on the upper connecting pipe 5 and the lower connecting pipe 15 as needed. An upper telescopic joint 1 and a lower telescopic joint 13 are respectively arranged at the upper end of the upper connecting pipe 5 and the lower end of the lower connecting pipe 15 and are used for being connected with other equipment.

The heat exchange tube 7 is wound on the central cylinder 16 and extends to be connected with the pipe joint 4, meanwhile, the support plate 8 supports the heat exchange tube 7, additional load to the heat exchange tube due to gravity is prevented, and the support plate 8 is welded on the inner side of the shell. The partition plate 11 is provided in the lower connection pipe 15 to separate the hot and cold ends of the reverse flow fluid.

The shell 10 is respectively connected with the upper end enclosure 2 and the lower end enclosure 12, and a closed cavity is formed for positive fluid. The forward flow inlet nipple 3 is disposed at an upper end position of the housing 10. The forward flow outlet connecting pipe 14 is arranged at the position of the lower seal head 12 close to the center, so that forward flow fluid can flow out conveniently.

The middle openings of the upper seal head 2 and the lower seal head 12 are respectively connected with an upper connecting pipe 5 and a lower connecting pipe 15.

A mount 17 is provided on the housing 10 for equipment installation.

The utility model fully utilizes the temperature compensation capability of the tube-wound heat exchanger and avoids the damage of large temperature difference stress to equipment.

The heat exchange tube is wound on the central cylinder in a clockwise and anticlockwise layered mode.

The utility model cancels the fixed tube plate structure of the traditional shell-and-tube heat exchanger, adopts the connection mode of the heat exchange tube and the tube joints, avoids the problem of overlarge axial stress of the fixed tube plate, and distributes the axial stress generated by the heat exchange tube to each tube joint.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. A vertical high-efficient heat exchanger of winding pipe for big difference in temperature heat transfer, it includes center tube and casing group become, its characterized in that: the center pipe support is arranged on the support plate, the support plate is welded on the inner side of the shell, the center pipe is respectively composed of a center cylinder, a center cylinder upper end socket and a center cylinder lower end socket, wherein the center cylinder upper end socket and the center cylinder lower end socket are respectively connected with an upper connecting pipe and a lower connecting pipe, pipe joints are respectively arranged on the upper connecting pipe and the lower connecting pipe, the upper pipe joint and the lower pipe joint are connected through a heat exchange pipe wound on the center cylinder, and an upper shrinkage joint and a lower shrinkage joint are respectively arranged at the upper end and the lower end of the upper connecting pipe.

2. The vertical high efficiency tube-around heat exchanger for large temperature differential heat exchange of claim 1, wherein: the shell is respectively connected with the upper end socket and the lower end socket, the formed closed cavity is used for positive fluid, a positive flow inlet connecting pipe is arranged at the position close to the upper end of the shell, a positive flow outlet connecting pipe is arranged at the position close to the center of the lower end socket, positive fluid is conveniently discharged, through holes are formed in the middle positions of the upper end socket and the lower end socket, and the through holes are respectively used for penetrating the upper connecting pipe and the lower connecting pipe.

3. The vertical high efficiency tube-around heat exchanger for large temperature differential heat exchange of claim 1, wherein: and a separation plate is further arranged in the lower connecting pipe and used for separating cold and hot ends of the reflux fluid.

4. The vertical high efficiency tube-around heat exchanger for large temperature differential heat exchange of claim 1 or 2, wherein: the outside of casing still sets up the support for the installation of equipment.