CN210154381U

CN210154381U - High-efficiency heat exchanger

Info

Publication number: CN210154381U
Application number: CN201920839570.8U
Authority: CN
Inventors: 钱颖雪
Original assignee: Wuxi Machinery and Electron Higher Professional and Technical School
Current assignee: Wuxi Machinery and Electron Higher Professional and Technical School
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2020-03-17
Anticipated expiration: 2029-06-05

Abstract

The utility model discloses a high-efficiency heat exchanger, the heat exchanger comprises a tube plate A and a tube plate B which are arranged in a heat exchanger shell, the two are respectively positioned at the two ends of the shell, at least 1 heat exchange tube bundle is arranged between the two, and at least 1 heat exchange fin is arranged in the direction vertical to the heat exchange tube bundle; an end cover A and an end cover B are respectively arranged at two ends of the outer part of the shell, a water pipe connector A is arranged on the end cover A, and a water pipe connector B is arranged on the end cover B; working medium inlets and working medium outlets are respectively arranged on two sides above the shell, and a drain outlet is arranged below the shell. Compared with the prior art, the utility model has the advantages of it is following: high efficiency heat exchanger increases heat exchanger heat transfer area F and improvement coefficient of heat transfer K through optimizing, reaches the purpose that improves heat exchange efficiency, and wherein structural optimization includes: a concave-convex stamping fin and tube bundle expansion deformation process; the heat exchanger does not increase the whole size of heat exchanger, and can realize improving heat exchanger heat exchange efficiency and energy saving and emission reduction's purpose.

Description

High-efficiency heat exchanger

Technical Field

The utility model belongs to the technical field of industry indirect heating equipment, a institutional advancement's heat exchanger is related to, specifically is high efficiency heat exchanger.

Background

In various application scenarios of industrial equipment, heat exchangers are a widely existing class of auxiliary equipment, and achieve the purpose of heat exchange for fluids of various media. For example, in the chemical and petrochemical industries, the proportion of heat exchangers in the overall plant can amount to 20% to 50% of the total construction costs, and the weight can amount to 40% of the total weight of the process equipment, and in some special applications (e.g. ammonia refrigeration plants), the weight of heat exchangers can even amount to 90% of the total weight of the refrigeration plant.

As can be seen from the basic heat transfer formula Q — KF Δ t, three measures are usually taken to increase the total heat transfer Q: the heat transfer coefficient K is improved, the heat exchange area F is increased, or the heat transfer temperature difference delta t is increased. The heat transfer temperature difference delta t between the cold medium and the hot medium is determined by objective application conditions and is difficult to change. Increasing the heat transfer area is an effective way to increase the total heat transfer, but usually results in an oversized cooler or a substantial cost increase. Therefore, it is considered to improve the heat exchange efficiency of the heat exchanger by increasing the heat transfer coefficient K.

Disclosure of Invention

The technical problem to be solved is as follows: in order to overcome prior art's not enough, under the prerequisite that does not increase the whole size of heat exchanger, the utility model discloses an improve heat transfer coefficient K and improve the heat exchange efficiency of heat exchanger, reach energy saving and emission reduction and optimize the purpose of technology, in view of this, the utility model provides a high efficiency heat exchanger.

The technical scheme is as follows: the high-efficiency heat exchanger comprises a tube plate A and a tube plate B which are arranged in a heat exchanger shell, wherein the tube plate A and the tube plate B are respectively positioned at two ends of the shell, at least 1 heat exchange tube bundle is arranged between the tube plate A and the tube plate B, and at least 1 heat exchange fin is arranged in the direction vertical to the heat exchange tube bundle; an end cover A and an end cover B are respectively arranged at two ends of the outer part of the shell, a water pipe connector A is arranged on the end cover A, and a water pipe connector B is arranged on the end cover B; working medium inlets and working medium outlets are respectively arranged on two sides above the shell, and a drain outlet is arranged below the shell.

Preferably, the heat exchange fins are circular, and gaps are reserved between the edges of the heat exchange fins and the shell.

Preferably, the heat exchange fins are uniformly distributed with holes for the heat exchange tube bundle to pass through.

Preferably, irregular concave-convex stamping patterns are arranged on the surfaces of the heat exchange fins.

Preferably, O-shaped rings are arranged between the end cover A and the end cover B and the heat exchanger shell to realize sealing with the heat exchanger shell.

Preferably, a sealing ring A and a sealing ring B are respectively arranged between the tube plate A and the tube plate B and the heat exchanger shell.

High efficiency heat exchanger theory of operation lies in: the heat exchanger simplifies heat exchange into a heat transfer process of a single-side ribbed surface, and the heat transfer system consists of a heat exchange process between a hot working medium and the ribbed surface, a heat conduction process of a pipe wall and a heat exchange process between cooling liquid and the surface of the pipe wall. When the clearance fit exists between the tube bundle and the fins, the heat transfer system is additionally added: a heat exchange process between the tube wall and the interstitial air, a heat conduction process of the interstitial air, and a heat exchange process of the interstitial air and the ribbed surface. After the fit clearance is eliminated through the expansion deformation process, the number of the heat transfer systems is reduced from 6 to 3, and the heat exchange efficiency is improved.

The utility model discloses the during operation, the cooling water passes through water pipe connection A entry and gets into the pipe layer, rises to pipe layer upper portion from pipe layer bottom submergence gradually under the action of gravity, carries out the heat exchange through the heat transfer working medium in tube bank surface and fin surface and the shell at this in-process, and the heat transfer working medium in the shell gets into by the working medium entry, flows out by the working medium export after the heat transfer and gets into next process. During which the coolant is kept constantly supplied and flowing taking away heat, and is discharged from the water connection B14. The heat exchange working medium is fully cooled after heat exchange through the tube bundle and the fins, and then enters the next process.

Has the advantages that: (1) high efficiency heat exchanger increases heat exchanger heat transfer area F and improvement coefficient of heat transfer K through optimizing, reaches the purpose that improves heat exchange efficiency, and wherein structural optimization includes: a concave-convex stamping fin and tube bundle expansion deformation process; (2) the heat exchanger does not increase the whole size of heat exchanger, and can realize improving heat exchanger heat exchange efficiency and energy saving and emission reduction's purpose.

Drawings

Fig. 1 is a schematic structural diagram of a high efficiency heat exchanger according to the present invention;

FIG. 2 is a cross-sectional view taken along line X-X of FIG. 1;

the heat exchanger comprises a shell, a heat exchanger shell, a pipe plate A, a pipe plate B, a heat exchanger tube bundle, a pipe plate B, a heat exchanger tube bundle, a heat exchanger fin, a heat exchanger shell, an end cover A, an end cover B, a sealing ring A, a sealing ring B, a drain outlet, a working medium inlet, a working medium outlet, a water pipe connector A, a water pipe connector B, a working medium inlet, a working medium outlet, a water pipe connector A and a water pipe connector B, wherein the pipe.

Detailed Description

The following examples further illustrate the present invention but are not to be construed as limiting the invention. Modifications and substitutions to methods, procedures, or conditions of the invention may be made without departing from the spirit and substance of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Example 1

As shown in fig. 1, a high efficiency heat exchanger includes: the tube plates A1 and the tube plates B2 are respectively distributed at two ends inside the heat exchanger shell 5, and the working medium inlet 11 and the working medium outlet 12 are reserved on the heat exchanger shell 5. A heat exchange tube bundle 3 and heat exchange fins 4 are arranged between the tube plate A1 and the tube plate B2, holes which are uniformly distributed according to a certain rule are reserved on the heat exchange fins 4, the heat exchange tube bundle 3 passes through the holes, and each tube bundle corresponds to the same hole on the fin and passes through the same hole in sequence. The fins and the central axis of the tube bundle are in a vertical relation, and the tube bundle penetrates through the fins and then eliminates gaps between the tube bundle and the fins by using an expansion deformation process so as to eliminate the link of maximum efficiency loss in the heat exchange chain. The whole heat exchange fin 4 is round, a gap is reserved between the outer edge and the inner surface of the shell of the heat exchanger, one of the basic functions of the fin is to increase the heat exchange area between the shell layer and the tube layer, meanwhile, irregular concave-convex stamping patterns which are manufactured in advance are arranged on the surface of the fin to further increase the heat exchange area, and the other function of the concave-convex stamping patterns is to keep the gap to avoid complete compaction and reduce the heat exchange area after the fin is overlapped, compressed and assembled. After passing through the heat exchange fins 4, the heat exchange tube bundle 3 is connected and sealed with the tube plate a1 and the tube plate B2 on both sides through a welding process. Two ends of the outer side of the heat exchanger shell 5 are respectively connected with an end cover A6 and an end cover B7 through bolts, the end cover A6 and the end cover B7 are sealed with the heat exchanger shell 5 through O-shaped rings, and a water pipe connector A13 and a water pipe connector B14 are respectively reserved on the end cover A6 and the end cover B7. The sealing effect between the excircle of the tube plate A1 and the excircle of the tube plate B2 and the inner wall of the shell of the heat exchanger is realized by a sealing ring A8 and a sealing ring B9, and the tube layer and shell working medium are separated to avoid leakage. And a sewage draining outlet is reserved at the bottom end of the heat exchanger shell 5 and used for draining condensed water.

The heat exchanger simplifies heat exchange into a heat transfer process of a single-side ribbed surface, and the heat transfer system consists of a heat exchange process between a hot working medium and the ribbed surface, a heat conduction process of a pipe wall and a heat exchange process between cooling liquid and the surface of the pipe wall. When the clearance fit exists between the tube bundle and the fins, the heat transfer system is additionally added: a heat exchange process between the tube wall and the interstitial air, a heat conduction process of the interstitial air, and a heat exchange process of the interstitial air and the ribbed surface. After the fit clearance is eliminated through the expansion deformation process, the number of the heat transfer systems is reduced from 6 to 3, and the heat exchange efficiency is improved.

Claims

1. The high-efficiency heat exchanger is characterized by comprising a tube plate A (1) and a tube plate B (2) which are arranged in a heat exchanger shell (5), wherein the tube plate A and the tube plate B are respectively positioned at two ends of the shell, at least 1 heat exchange tube bundle (3) is arranged between the tube plate A and the tube plate B, and at least 1 heat exchange fin (4) is arranged in the direction vertical to the heat exchange tube bundle (3); an end cover A (6) and an end cover B (7) are respectively arranged at two outer ends of the shell (5), a water pipe connector A (13) is arranged on the end cover A (6), and a water pipe connector B (14) is arranged on the end cover B (7); working medium inlets (11) and working medium outlets (12) are respectively arranged on two sides above the shell (5), and a sewage draining outlet (10) is arranged below the shell.

2. The high efficiency heat exchanger according to claim 1, characterized in that the heat exchanging fins (4) are circular and have a gap between their edges and the shell (5).

3. The high efficiency heat exchanger according to claim 1, characterized in that the heat exchange fins (4) are evenly distributed with holes for the heat exchange tube bundle (3) to pass through.

4. The high-efficiency heat exchanger according to claim 1, wherein the surface of the heat exchange fin (4) is provided with irregular concave-convex stamping patterns.

5. The high efficiency heat exchanger according to claim 1, wherein O-rings are provided between the end caps a (6) and B (7) and the heat exchanger housing (5) to effect sealing with the heat exchanger housing (5).

6. The high efficiency heat exchanger according to claim 1, characterized in that sealing rings a (8) and B (9) are provided between the tube sheet a (1) and the tube sheet B (2), respectively, and the heat exchanger shell (5).