CN111076571A

CN111076571A - Shell and tube heat exchanger

Info

Publication number: CN111076571A
Application number: CN201911372553.9A
Authority: CN
Inventors: 杨子仲; 卞静; 梁兴壮; 于静
Original assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Current assignee: Shenyang Aircraft Design and Research Institute Aviation Industry of China AVIC
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-28

Abstract

The application belongs to the field of heat exchanger structural design, and particularly relates to a shell-and-tube heat exchanger. The method comprises the following steps: a shell and a heat exchange tube. The cross section of the shell is C-shaped, openings are formed in the two ends of the shell, and seal heads are arranged on the inner sides of the openings respectively; the heat exchange tube includes a plurality ofly, the heat exchange tube includes straightway and spiral section, and is a plurality of the baffling board is installed to the spiral section of heat exchange tube, the heat exchange tube is followed one side head of casing stretches into, and follows the opposite side head of casing stretches out, the spiral section sets up in the casing. The cold medium and the heat medium flow in respective flow channels, are restrained by the spiral section flow channels of the heat exchange tube, are closer to a countercurrent flow mode, and have higher average temperature difference; the flow direction of the fluid is constantly changed under the constraint of the spiral section flow channel, and the fluid continuously impacts the pipe wall and destroys the boundary layer, so that the fluid has higher heat exchange coefficient; the shell, the end sockets at two sides, the heat exchange tubes and the baffle plates are designed integrally, and have larger heat exchange surface connection.

Description

Shell and tube heat exchanger

Technical Field

The application belongs to the field of heat exchanger structural design, and particularly relates to a shell-and-tube heat exchanger.

Background

The heat exchanger is an indispensable important component in modern industrial production and people's life, such as power, metallurgy, chemical engineering, petroleum, construction, mechanical manufacturing, food, medicine, aviation, aerospace, ships and automobiles. The product has various forms and extremely wide application occasions, wherein the shell-and-tube radiator has the advantages of simple structure, easy cleaning, low manufacturing cost and the like, has the occupancy of more than 50 percent, but has the defects of lower heat exchange efficiency, large volume, heavy weight and the like. Especially, the whole performance of the product is limited or can not be used in the occasions of high integration level of the product, strict space limitation and strict weight control.

Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

It is an object of the present application to provide a shell and tube heat exchanger to solve at least one of the problems of the prior art.

The technical scheme of the application is as follows:

a shell and tube heat exchanger comprising:

the cross section of the shell is C-shaped, openings are formed in the two ends of the shell, and seal heads are arranged on the inner sides of the openings respectively;

the heat exchange tube comprises a plurality of heat exchange tubes, the heat exchange tube comprises a straight line section and a spiral section, the spiral section of the heat exchange tube is provided with a baffle plate, the heat exchange tube is extended into the shell from one end socket on one side of the shell and is extended out from the end socket on the other side of the shell, and the spiral section is arranged in the shell.

Optionally, a plurality of the heat exchange tubes are arranged in an array.

Optionally, the heat exchange tubes comprise 25, arranged in an array of 5 × 5.

Optionally, the baffle plate is provided with a mounting hole matched with the heat exchange tube.

Optionally, the shell, the end socket, the heat exchange tube and the baffle plate are integrally formed.

The invention has at least the following beneficial technical effects:

the application of shell-and-tube heat exchanger has higher average temperature difference, larger heat exchange area, higher heat exchange coefficient, stronger heat exchange capacity, higher efficiency and smaller corresponding weight.

Drawings

FIG. 1 is a general schematic view of a shell and tube heat exchanger according to one embodiment of the present application;

FIG. 2 is a cross-sectional view of a shell and tube heat exchanger according to one embodiment of the present application;

FIG. 3 is a view A-A of FIG. 2;

FIG. 4 is a schematic view of a heat exchange tube of a shell and tube heat exchanger according to one embodiment of the present application;

FIG. 5 is a schematic view of a baffle plate of a shell-and-tube heat exchanger according to one embodiment of the present application.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.

The present application is described in further detail below with reference to fig. 1 to 5.

The application provides a shell and tube heat exchanger, includes: a shell and a heat exchange tube.

Specifically, the cross section of the shell is C-shaped, two ends of the shell are both provided with openings, and the inner sides of the openings are respectively provided with seal heads; the heat exchange tubes comprise a plurality of straight line segments and spiral segments, the spiral segments of the heat exchange tubes are provided with baffle plates, the heat exchange tubes extend into the shell from a seal head on one side of the shell and extend out from a seal head on the other side of the shell, and the spiral segments are arranged in the shell.

At the shell and tube type heat exchanger of this application, a plurality of heat exchange tubes are array arrangement. In one embodiment of the present application, the heat exchange tubes include 25 heat exchange tubes, which are arranged in an array of 5 × 5, and the baffles are provided with mounting holes adapted to the heat exchange tubes.

Advantageously, in this embodiment, the shell, the end enclosure, the heat exchange tube, and the baffle plate are all integrally formed.

According to a basic heat transfer formula Q ═ KF Δ t, wherein Q is the heat exchange quantity, F is the heat exchange area, K is the heat exchange coefficient, and Δ t is the average temperature difference. According to the shell-and-tube heat exchanger, the cold medium flows in the shell, the heat medium flows in the heat exchange tube, the cold medium and the heat medium flow in respective flow channels, and are restrained by the spiral section flow channels of the heat exchange tube, the counter-flow mode is closer, and compared with the cross-flow mode of the existing shell-and-tube heat exchanger, the shell-and-tube heat exchanger has a higher average temperature difference; cold medium and heat medium flow in the respective flow channels, are restrained by the spiral section flow channels, the flow direction of the cold medium and the heat medium is changed from time to time, and fluid continuously impacts the pipe wall and destroys the boundary layer; the shell, the end sockets on two sides, the heat exchange tubes and the baffle plates are designed integrally, and compared with a split type welding structure of the existing shell-and-tube heat exchanger, the shell-and-tube heat exchanger has a larger heat exchange surface.

The application of the shell-and-tube heat exchanger has higher average temperature difference, larger heat exchange area and higher heat exchange coefficient, and compared with the existing tube shell, the shell-and-tube heat exchanger has stronger heat exchange capacity and higher efficiency, and the corresponding weight is smaller.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A shell and tube heat exchanger, comprising:

2. A shell and tube heat exchanger according to claim 1, wherein the plurality of heat exchange tubes are arranged in an array.

3. A shell and tube heat exchanger according to claim 2, characterized in that the heat exchange tubes comprise 25, arranged in a 5 by 5 array.

4. A shell and tube heat exchanger according to claim 3, wherein the baffles are provided with mounting holes adapted to the heat exchange tubes.

5. A shell and tube heat exchanger according to claim 1, wherein the shell, the headers, the heat exchange tubes, and the baffles are all integrally formed.