CN220728998U

CN220728998U - Heat exchanger

Info

Publication number: CN220728998U
Application number: CN202223090674.4U
Authority: CN
Inventors: 尹东海; 周洋; 许嘉峻; 王豪杰
Original assignee: Suzhou Yingzhong Environmental Protection Co ltd
Current assignee: Suzhou Yingzhong Environmental Protection Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2024-04-05
Anticipated expiration: 2032-11-17

Abstract

The utility model discloses a heat exchanger, which comprises a shell and a plurality of heat exchange tubes, wherein a water inlet and a water outlet are formed in the shell, the heat exchange tubes are fixed in the shell through a heat exchange tube plate and a heat exchange baffle plate, the heat exchange tubes are embossing tubes, and a plurality of concave rings are arranged on the outer surfaces of the heat exchange tubes at intervals along the length direction of the heat exchange tubes; the concave ring comprises two side walls and a bottom wall, the two side walls are symmetrically arranged, the bottom wall is positioned between the two side walls, the side walls are arc-shaped, and the bottom wall is planar; the section of the side wall is in a quarter arc shape; the joint of the adjacent heat exchange tube body units and the concave ring is an arc surface, the bending direction of the arc surface is opposite to the bending direction of the side wall, the bending degree of the arc surface is the same as the bending degree of the side wall, and the arc surface is in a quarter arc shape; the wall thickness of the heat exchange tube body unit is equal to that of the concave ring.

Description

Heat exchanger

Technical Field

The utility model belongs to key parts of heat exchange equipment, in particular to a working condition suitable for gas-liquid heat exchange, and particularly relates to a heat exchanger.

Background

The shell and tube heat exchanger main body consists of a heat exchange tube, a heat exchanger shell, a baffle plate, a tube plate and a water inlet and outlet. The increased heat exchange area of the mainstream tube array heat exchangers generally requires an increased number or length of heat exchange tubes, which results in a bulky and heavy heat exchanger.

The heat exchange tube is replaced by an embossing tube from a smooth round tube in the patent with the patent number of CN212006826U, specifically, the embossing tube is coaxial with the shell and is arranged in the first cavity, the first inner concave surface and the second inner concave surface are uniformly formed on the outer surface of the embossing tube, the first inner concave surface and the second inner concave surface are staggered, so that the heat exchange area between high-temperature liquid flowing in the shell and cooling liquid flowing in the embossing tube is effectively increased, and the outer wall of the embossing tube is extruded into the first inner concave surface and the second inner concave surface, so that the cooling liquid close to the inner wall of the second cavity generates periodic disturbance, the flowing boundary layer and the heat transfer boundary layer of the cooling liquid are damaged, and turbulent flow can be formed under the condition of small Reynolds number, thereby accelerating the flow rate of the cooling liquid and further improving the heat exchange efficiency; the circulation direction of the high-temperature liquid in the shell is opposite to that of the cooling liquid in the embossing tube, so that the heat exchange process is accelerated, the heat exchange effect is better, and the phenomenon that the heat exchange is incomplete due to too much volume of the high-temperature liquid in circulation is avoided. It is further preferable that the gap distance h between the maximum outer diameter of the embossing tube and the inner wall of the housing is 5mm to 10mm.

However, the embossed tube structure in this patent has the following drawbacks: on one hand, the embossing is flat and concave, the structural strength is weaker, if the strength is improved, the thickness of the pipe wall is required to be increased, and the heat transfer coefficient is reduced when the thickness is increased; on the other hand, the distance between the embossing pipes and the embossing pipe and the distance between the embossing pipes and the shell are required to be too small, and although the heat transfer efficiency is improved, liquid is easy to scale and adhere to the pipe wall of the heat exchange pipe and the shell through heat exchange, so that the flow rate and the heat exchange amount are reduced, the whole heat exchanger is not easy to clean after scaling, and the whole heat exchanger needs to be replaced.

Based on the above, there is an urgent need to develop a heat exchange tube with strong structural strength, thin tube wall and high heat exchange efficiency, and a heat exchanger with smaller occupied area of equipment, lower material cost, less scale hanging and higher heat exchange efficiency.

Disclosure of Invention

In view of the foregoing, a first object of the present utility model is to provide a heat exchange tube with strong structural strength, thin tube wall and high heat exchange efficiency.

In order to achieve the first object, the present utility model adopts the following technical scheme:

the utility model provides a heat exchange tube, the heat exchange tube is the knurling pipe, the surface of heat exchange tube is provided with multichannel concave ring along its length direction interval.

In the above technical solution, preferably, the distances between two adjacent concave rings are equal.

In the above technical solution, it is further preferable that the concave ring includes two side walls symmetrically arranged and a bottom wall located between the two side walls, the side walls are arc-shaped, and the bottom wall is planar.

In the above technical solution, it is further preferable that the opening direction of the side wall faces the inside of the concave ring.

In the above aspect, it is still further preferable that the cross section of the side wall is in a quarter circular arc shape.

In the above technical scheme, it is still further preferable that the concave ring is concave toward the axial line direction of the heat exchange tube, and the concave depth is 0.5-0.9 mm.

In the above technical scheme, and further preferably, the heat exchange tube comprises a plurality of heat exchange tube body units and a plurality of concave rings, wherein the heat exchange tube body units and the concave rings are alternately arranged, and the width ratio of the heat exchange tube body units to the concave rings is (4.5-5.5): 1.

in the above technical solution, it is further preferable that the connection between the adjacent heat exchange tube body unit and the concave ring is an arc surface, the bending direction of the arc surface is opposite to the bending direction of the side wall, and the bending degree of the arc surface is the same as the bending degree of the side wall.

In the above technical solution, it is still further preferable that the wall thickness of the heat exchange tube body unit is equal to the wall thickness of the concave ring.

The second object of the utility model is to provide a heat exchanger which has smaller equipment occupation area, lower material cost, less scale hanging and higher heat exchange efficiency.

In order to achieve the second object, the present utility model adopts the following technical scheme:

the heat exchanger comprises a shell and a plurality of heat exchange tubes according to any one of the technical schemes, wherein a water inlet and a water outlet are formed in the shell, and the heat exchange tubes are fixed in the shell through a heat exchanger tube plate and a heat exchanger baffle plate.

Compared with the prior art, the utility model has the following advantages: the heat exchange tube adopts the embossing tube to replace the heat exchange tube of the common tube type heat exchanger, the concave ring of the embossing tube wall not only can enable the internal water flow to generate tiny vortex and prolong the residence time, but also can enable the heat exchange tube to reduce the thickness of the tube wall while guaranteeing the structural strength, thereby further improving the heat conversion efficiency of the equipment, and having the advantages of strong structural strength, thin tube wall and high heat exchange efficiency; the heat exchanger of the utility model adopts the heat exchange pipe, so that compared with other heat exchangers with the same heat exchange area, the heat exchanger has the advantages of smaller equipment occupation area, lower material cost and less scale hanging.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a heat exchanger in a preferred embodiment of the utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is an enlarged view at B in FIG. 2;

wherein, the reference numerals include: the heat exchanger comprises the following components of a shell 100, a water inlet 110, a water outlet 120, heat exchange tubes 200, a heat exchanger tube plate 300, a heat exchanger baffle plate 400, a concave ring 500, a side wall 510, a bottom wall 520, a heat exchange tube body unit 600 and an arc surface 610.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

Referring to fig. 1, the heat exchanger in this embodiment includes a housing 100 and a plurality of heat exchange tubes 200 disposed in the housing 100, the heat exchange tubes 200 are embossed tubes, the heat exchange tubes 200 are fixed by 2 heat exchanger tube plates 300 and 3 heat exchanger baffles 400, and a water inlet 110 and a water outlet 120 are disposed on the housing 100.

Referring to fig. 2, a plurality of concave rings 500 are provided on the outer surface of the heat exchange tube 200 at intervals along the length direction thereof, the concave rings 500 being recessed toward the axial line direction of the heat exchange tube 200, the depth of the recess being 0.7mm, and the distances between two adjacent concave rings 500 being equal. Thus, the heat exchange tube 200 includes a plurality of heat exchange tube body units 600 and a plurality of concave rings 500 along the length direction thereof, the heat exchange tube body units 600 and the concave rings 500 being alternately arranged, and the ratio of the width of the heat exchange tube body units 600 to the width of the concave rings 500 is 5:1, the wall thickness of the heat exchange tube body unit 600 is equal to that of the concave ring 500.

Referring to fig. 3, the concave ring 500 includes two side walls 510 symmetrically disposed and a bottom wall 520 located between the two side walls 510, the side walls 510 are in a quarter arc shape, an opening direction of the side walls faces the inside of the concave ring 500, the bottom wall 520 is in a plane shape, a joint between adjacent heat exchange tube body units 600 and the concave ring 500 is an arc surface 610, a bending direction of the arc surface 610 is opposite to a bending direction of the side walls 510, a bending degree of the arc surface 610 is the same as a bending degree of the side walls 510, and the arc surface 610 is also in a quarter arc shape.

The heat exchange tube in the heat exchanger of the embodiment has the following advantages:

(1) The heat exchange area is 30% more than that of the same-level heat exchanger, and the heat exchange efficiency is higher;

(2) The heat exchange tube has thin wall, high strength, high heat conduction efficiency, low manufacturing cost and reduced scale hanging wall;

(3) The relative residence time of water flow is long, and heat exchange is sufficient;

(4) Small volume and small occupied area;

(5) Reducing energy consumption, saving energy and reducing emission.

In summary, the heat exchange tube in the heat exchanger of the embodiment is replaced by an embossing tube by a conventional light tube, and the surface area of the embossing tube is 30% more than that of the conventional light tube for the two heat exchange tubes with the same diameter and length; the concave ring of the embossing pipe wall can enable the internal water flow to generate micro vortex, so that the residence time is prolonged; the concave ring structure and the heat exchange tube body unit are alternately arranged, so that the thickness of the tube wall of the heat exchange tube is reduced while the structural strength of the heat exchange tube is ensured, and the heat conversion efficiency of the equipment can be further improved. Compared with other heat exchangers with the same heat exchange area, the equipment occupies smaller area, reduces the material cost and reduces the scale hanging wall.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The heat exchanger is characterized by comprising a shell and a plurality of heat exchange tubes, wherein a water inlet and a water outlet are formed in the shell, the heat exchange tubes are fixed in the shell through a heat exchange tube plate and a heat exchange baffle plate, the heat exchange tubes are embossing tubes, and a plurality of concave rings are arranged on the outer surfaces of the heat exchange tubes at intervals along the length direction of the heat exchange tubes;

the concave ring comprises two side walls and a bottom wall, the two side walls are symmetrically arranged, the bottom wall is positioned between the two side walls, the side walls are arc-shaped, and the bottom wall is planar; the section of the side wall is in a quarter arc shape; the joint of the adjacent heat exchange tube body units and the concave ring is an arc surface, the bending direction of the arc surface is opposite to the bending direction of the side wall, the bending degree of the arc surface is the same as the bending degree of the side wall, and the arc surface is in a quarter arc shape; the wall thickness of the heat exchange tube body unit is equal to that of the concave ring.

2. The heat exchanger of claim 1, wherein the distance between two adjacent ones of the concave rings is equal.

3. The heat exchanger of claim 1, wherein the sidewall opens in a direction toward the inside of the concave ring.

4. The heat exchanger of claim 1, wherein the concave ring is concave toward the axial line direction of the heat exchange tube, and the concave depth is 0.5-0.9 mm.

5. The heat exchanger of claim 4, comprising a plurality of heat exchange tube body units and a plurality of concave rings, the heat exchange tube body units and the concave rings being alternately arranged, a width ratio of the heat exchange tube body units to the concave rings being (4.5-5.5): 1.