Multi-piece combined shell and tube heat exchanger

Abstract

The present invention discloses a multi-piece combined tube and shell heat exchanger, comprising a cylinder and end covers arranged at both ends of the cylinder, a refrigerant inlet pipe and a refrigerant outlet pipe are symmetrically arranged on one end cover, a water inlet is arranged at the upper part of the cylinder, and a water outlet is arranged at the lower part, a heat exchange plate group is arranged in the cylinder, and the heat exchange plate group includes a non-sealed protective cover and a plurality of split heat exchange units and a whole-piece heat exchange unit arranged in sequence in the protective cover, and the whole-piece heat exchange unit is located at the end. The multi-piece combined tube and shell heat exchanger of the present invention has a large refrigerant distribution area through the heat exchange plate group containing the split heat exchange unit and the whole-piece heat exchange unit, the convection in the two semicircular heat exchange plates in the split heat exchange unit is good, dead zones are not easily generated, the heat exchange efficiency is high, and the overall strength is good, the practicability is strong, and it is worthy of promotion.

Description

Technical Field

[0001] The invention belongs to the field of heat exchanger manufacturing, and in particular relates to a multi-piece combined tube shell heat exchanger. Background Art

[0002] Shell and tube heat exchangers, also known as shell and tube heat exchangers, are wall heat exchangers that use the wall of the tube bundle enclosed in the shell as the heat transfer surface. This type of heat exchanger has a simple structure and reliable operation. However, the current shell and tube heat exchangers still have the problem of dead zones and poor reflux. Therefore, people hope to find a better way to solve this problem. Summary of the invention

[0003] In view of the above technical problems, the present invention provides a multi-plate combined shell and tube heat exchanger.

[0004] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0005] A multi-piece combined shell and tube heat exchanger comprises a cylinder and end covers arranged at both ends of the cylinder. On one end cover, a refrigerant inlet pipe and a refrigerant outlet pipe are symmetrically arranged. The cylinder has a water inlet at the top and a water outlet at the bottom. A heat exchange plate group is arranged in the cylinder. The heat exchange plate group comprises a non-sealed protective cover and a plurality of split heat exchange units and a whole-piece heat exchange unit arranged in sequence in the protective cover. The whole-piece heat exchange unit is located at the end. The upper end of the protective cover is connected to the water inlet on the cylinder, and the lower end is connected to the water outlet on the cylinder. The split heat exchange unit is composed of two semicircular heat exchange plates symmetrically arranged to form a circle. The semicircular heat exchange plate is a circular heat exchange plate that is bent but not connected in the middle. The sealed edge is connected and fixed to the protective cover, and the whole piece heat exchange unit is a structure with a cavity in the middle and sealed edges; the refrigerant inlet pipe on the end cover is connected to the refrigerant distribution pipe, and the refrigerant distribution pipe is divided into two paths, which are respectively connected to the upper parts of the two semicircular heat exchange plates in all the split heat exchange units in a way of penetration and perforation, and finally connected to the whole piece heat exchange unit; the refrigerant outlet pipe on the end cover is connected to the refrigerant return pipe, and the refrigerant return pipe is divided into two paths, which are respectively connected to the lower parts of the two semicircular heat exchange plates in all the split heat exchange units in a way of penetration and perforation in the penetration part, and finally connected to the whole piece heat exchange unit.

[0006] Preferably, the non-sealed protective cover is two symmetrically arranged protective plates, and a gap for water flow is provided between both ends of the two protective plates.

[0007] Preferably, the sealing parts on the split heat exchange unit and the integral heat exchange unit are both brazed structures.

[0008] Preferably, the refrigerant distribution pipe contacts the upper positions of the two semicircular heat exchange plates in the split heat exchange unit, that is, the two water inlet positions on the circular heat exchange plates before the semicircular heat exchange plates are bent, and the refrigerant return pipe contacts the lower positions of the two semicircular heat exchange plates in the split heat exchange unit, that is, the two water outlet positions on the circular heat exchange plates before the semicircular heat exchange plates are bent.

[0009] Preferably, the circular heat exchange plate is provided with a herringbone structure to increase the heat exchange area.

[0010] Due to the adoption of the above technical solution, the present invention has the following technical effects:

[0011] The multi-plate combined shell and tube heat exchanger of the present invention has a heat exchange plate group including a split heat exchange unit and a whole-plate heat exchange unit. The refrigerant enters from the refrigerant inlet pipe, enters into the upper part of each split heat exchange unit and the whole-plate heat exchange unit at the rear through the refrigerant distribution pipe, and then flows back from the whole-plate heat exchange unit at the rear and the lower part of each split heat exchange unit to the refrigerant outlet pipe through the refrigerant return pipe. The refrigerant distribution area is large, the convection in the two semicircular heat exchange plates in the split heat exchange unit is good, dead zones are not easily generated, the heat exchange efficiency is high, the overall strength is good, the practicability is strong, and it is worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0013] Figure 1 It is a schematic diagram of the appearance structure of an embodiment of the present invention;

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat exchanger group;

[0015] Figure 3 for Figure 2 Disassembly diagram of

[0016] Figure 4 for Figure 2 Cross-sectional view of the upper middle part. DETAILED DESCRIPTION

[0017] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0018] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0019] like Figure 1-4A multi-plate combined shell and tube heat exchanger shown in the figure comprises a cylinder 1 and end covers 2 arranged at both ends of the cylinder 1. On one side of the end cover 2, a refrigerant inlet pipe 3 and a refrigerant outlet pipe 4 are symmetrically arranged. On the cylinder 1, a water inlet 5 is arranged at the upper part, and a water outlet 6 is arranged at the lower part. A heat exchange plate group 7 is arranged in the cylinder 1. The heat exchange plate group 7 comprises a non-sealed protective cover 8 and a plurality of split heat exchange units and a whole-plate heat exchange unit 9 arranged in sequence in the protective cover 8. The whole-plate heat exchange unit 9 is located at the end. The upper end of the protective cover 8 is connected to the water inlet 5 on the cylinder 1, and the lower end is connected to the water outlet 6 on the cylinder 1. The split heat exchange unit is composed of two semicircular heat exchange plates 10 symmetrically arranged to form a circle. The semicircular heat exchange plate 10 is a circular heat exchange plate bent. However, the middle part is not in contact with the back and the edge is sealed, and the sealed edge is connected and fixed to the protective cover 8. The whole-piece heat exchange unit 9 is a structure with a cavity in the middle and sealed edges; the refrigerant inlet pipe 3 on the end cover 2 is connected to the refrigerant distribution pipe 11, and the refrigerant distribution pipe 11 is divided into two paths, which are respectively connected to the upper parts of the two semicircular heat exchange plates 10 in all the split heat exchange units in a forward manner by penetration and perforation, and finally connected to the whole-piece heat exchange unit 9. The refrigerant outlet pipe 4 on the end cover 2 is connected to the refrigerant return pipe 12, and the refrigerant return pipe 12 is divided into two paths, which are respectively connected to the lower parts of the two semicircular heat exchange plates 10 in all the split heat exchange units in a forward manner by penetration and perforation in the penetration part, and finally connected to the whole-piece heat exchange unit 9.

[0020] The non-sealed protective cover 8 is composed of two symmetrically arranged protective plates, and a gap for water flow is provided between both ends of the two protective plates.

[0021] The sealing parts on the split heat exchange unit and the whole heat exchange unit 9 are both brazed structures.

[0022] The refrigerant distribution pipe 11 contacts the upper positions of the two semicircular heat exchange plates 10 in the split heat exchange unit, that is, the two water inlet positions on the circular heat exchange plates before the semicircular heat exchange plates 10 are bent, and the refrigerant return pipe 12 contacts the lower positions of the two semicircular heat exchange plates 10 in the split heat exchange unit, that is, the two water outlet positions on the circular heat exchange plates before the semicircular heat exchange plates are bent.

[0023] The circular heat exchange plate is provided with a herringbone structure to increase the heat exchange area.

[0024] The multi-plate combined shell and tube heat exchanger of the present invention has a heat exchange plate group including a split heat exchange unit and a whole-plate heat exchange unit. The refrigerant enters from the refrigerant inlet pipe, enters into the upper part of each split heat exchange unit and the whole-plate heat exchange unit at the rear through the refrigerant distribution pipe, and then flows back from the whole-plate heat exchange unit at the rear and the lower part of each split heat exchange unit to the refrigerant outlet pipe through the refrigerant return pipe. The refrigerant distribution area is large, the convection in the two semicircular heat exchange plates in the split heat exchange unit is good, dead zones are not easily generated, the heat exchange efficiency is high, the overall strength is good, the practicability is strong, and it is worthy of promotion.

[0025] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. Multi-piece combined shell and tube heat exchanger, characterized in that: It includes a cylinder and end covers arranged at both ends of the cylinder, and a refrigerant inlet pipe and a refrigerant outlet pipe are symmetrically arranged on one end cover. The cylinder is provided with a water inlet at the top and a water outlet at the bottom. A heat exchange plate group is arranged in the cylinder, and the heat exchange plate group includes a non-sealed protective cover and a plurality of split heat exchange units and a whole-piece heat exchange unit arranged in sequence in the protective cover. The whole-piece heat exchange unit is located at the end. The upper end of the protective cover is connected to the water inlet on the cylinder, and the lower end is connected to the water outlet on the cylinder. The split heat exchange unit is composed of two semicircular heat exchange plates symmetrically arranged to form a circle. The semicircular heat exchange plate is made by bending a circular heat exchange plate but not touching the middle and sealing the edges. The herringbone structure is provided on the shaped heat exchange plate, and the sealed edge is connected and fixed to the protective cover. The whole piece heat exchange unit is a structure with a cavity in the middle and sealed edges; the refrigerant inlet pipe on the end cover is connected to the refrigerant distribution pipe, and the refrigerant distribution pipe is divided into two ways, which are respectively connected to the upper part of the two semicircular heat exchange plates in all the split heat exchange units in a way of penetration and perforation, and finally connected to the whole piece heat exchange unit; the refrigerant outlet pipe on the end cover is connected to the refrigerant return pipe, and the refrigerant return pipe is divided into two ways, which are respectively connected to the lower part of the two semicircular heat exchange plates in all the split heat exchange units in a way of penetration and perforation in the penetration part, and finally connected to the whole piece heat exchange unit; The refrigerant distribution pipe contacts the upper positions of the two semicircular heat exchange plates in the split heat exchange unit, that is, the two water inlet positions on the circular heat exchange plates before the semicircular heat exchange plates are bent, and the refrigerant return pipe contacts the lower positions of the two semicircular heat exchange plates in the split heat exchange unit, that is, the two water outlet positions on the circular heat exchange plates before the semicircular heat exchange plates are bent; The non-sealed protective cover is two symmetrically arranged protective plates, and a gap for water flow is provided between both ends of the two protective plates.

2. The multi-plate combined shell and tube heat exchanger according to claim 1, characterized in that: The sealing parts on the split heat exchange unit and the whole piece heat exchange unit are both brazed structures.

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