Three-way spiral shell and tube heat exchanger

Abstract

This invention discloses a three-way spiral shell-and-tube heat exchanger, comprising a cylindrical body and end caps at both ends of the cylindrical body. On one end cap, symmetrically arranged are a first medium inlet pipe, a first medium outlet pipe, a second medium inlet pipe, and a second medium outlet pipe. The cylindrical body has an inlet at the top and an outlet at the bottom. Inside the cylindrical body, a heat exchange fin assembly is provided, comprising a non-sealed inner support cover and an outer support cover. Between the inner and outer support covers, a first medium spiral heat exchange chamber and a second medium spiral heat exchange chamber are arranged. In this three-way spiral shell-and-tube heat exchanger, the first and second media respectively enter the upper part of the first and second medium spiral heat exchange chambers through pipes and then flow back from the lower part of the first and second medium spiral heat exchange chambers, exchanging heat with water during the process. This achieves three-way heat exchange. The first and second medium spiral heat exchange chambers have good convection, are less prone to dead zones, have high heat exchange efficiency, and are highly practical.

Description

Technical Field

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

[0002] Shell and tube heat exchanger, also known as shell and tube heat exchanger, is a wall heat exchanger that uses the wall of the tube bundle enclosed in the shell as the heat transfer surface. This heat exchanger has a simple structure and reliable operation. However, the current shell and tube heat exchanger can only achieve heat exchange between two fluids, and there are also problems such as 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 three-way spiral shell and tube heat exchanger.

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

[0005] A three-way spiral shell and tube heat exchanger comprises a cylinder and end covers arranged at both ends of the cylinder, a first medium inlet pipe and a first medium outlet pipe as well as a second medium inlet pipe and a second medium outlet pipe are symmetrically arranged on one end cover, a water inlet is arranged at the top of the cylinder and a water outlet is arranged at the bottom, a heat exchange plate group is arranged in the cylinder, the heat exchange plate group comprises a non-sealed inner support cover and an outer support cover, a first medium spiral heat exchange cavity and a second medium spiral heat exchange cavity are arranged between the inner support cover and the outer support cover, the pitch and radius of the spiral heat exchange cavity of the second medium are both smaller than the first medium spiral heat exchange cavity, the outer periphery of the first medium spiral heat exchange cavity is in contact with the outer support cover and is fixed by the outer support cover, the inner periphery of the second medium spiral heat exchange cavity is in contact with the inner support cover and is fixed by the inner support cover The support cover is fixed, the upper end of the outer support cover is connected to the water inlet on the cylinder, and the lower end is connected to the water outlet on the cylinder; the first medium inlet connecting pipe on the end cover is connected to the first medium distribution pipe, and is connected to the upper part of the first medium spiral heat exchange chamber in a through-hole and perforated manner, the first medium outlet connecting pipe on the end cover is connected to the first medium return pipe, and is connected to the lower part of the first medium spiral heat exchange chamber in a through-hole and perforated manner; the second medium inlet connecting pipe on the end cover is connected to the second medium distribution pipe, and is connected to the upper part of the second medium spiral heat exchange chamber in a through-hole and perforated manner, the second medium outlet connecting pipe on the end cover is connected to the second medium return pipe, and is connected to the lower part of the second medium spiral heat exchange chamber in a through-hole and perforated manner.

[0006] Preferably, the non-sealed inner support cover and the outer support cover are both composed of two symmetrically arranged protection plates, and a gap for water flow to pass through is provided between both ends of the two protection plates.

[0007] Preferably, the walls of the first medium spiral heat exchange chamber and the second medium spiral heat exchange chamber are both provided with a corrugated structure to increase the heat exchange area.

[0008] Due to the adoption of the above technical solution, the present invention has the following technical effects:

[0009] In the three-way spiral shell and tube heat exchanger of the present invention, the first and second media respectively enter the upper part of the first and second medium spiral heat exchange chambers through pipelines, and then flow back from the lower part of the first and second medium spiral heat exchange chambers. In the process, heat exchange is performed with water, thereby realizing three-way heat exchange, and the heat exchange area is large. The first and second medium spiral heat exchange chambers have good convection, are not prone to dead zones, have high heat exchange efficiency, good overall strength, and strong practicality, and are worthy of promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0011] Figure 1 It is a schematic diagram of the appearance structure of an embodiment of the present invention;

[0012] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat exchanger group;

[0013] Figure 3 for Figure 2 sectional view of . DETAILED DESCRIPTION

[0014] 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.

[0015] 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.

[0016] like Figure 1-3A three-way spiral 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 1, a first medium inlet pipe 3 and a first medium outlet pipe 4 as well as a second medium inlet pipe 5 and a second medium outlet pipe 6 are symmetrically arranged. On the cylinder 1, a water inlet 7 is arranged at the top and a water outlet 8 is arranged at the bottom. A heat exchange plate group 9 is arranged in the cylinder 1. The heat exchange plate group comprises a non-sealed inner support cover 10 and an outer support cover 11. Between the inner support cover 10 and the outer support cover 11, a first medium spiral heat exchange cavity 12 and a second medium spiral heat exchange cavity 13 are arranged. The pitch and radius of the spiral heat exchange cavity 13 of the second medium are both smaller than the first medium spiral heat exchange cavity 12. The outer periphery of the first medium spiral heat exchange cavity 12 is in contact with the outer support cover 11 and is fixed by the outer support cover 11. The inner periphery of the second medium spiral heat exchange cavity 13 is in contact with the inner support cover 10. The outer support cover 11 is in contact with and fixed by the inner support cover 10, the upper end of the outer support cover 11 is connected to the water inlet 7 on the cylinder 1, and the lower end is connected to the water outlet 8 on the cylinder 1; the first medium inlet pipe 3 on the end cover 2 is connected to the first medium distribution pipe 14, and is connected to the upper part of the first medium spiral heat exchange chamber 12 in a through-hole and perforated manner, the first medium outlet pipe 4 on the end cover 2 is connected to the first medium return pipe 15, and is connected to the lower part of the first medium spiral heat exchange chamber 12 in a through-hole and perforated manner; the second medium inlet pipe 5 on the end cover 2 is connected to the second medium distribution pipe 16, and is connected to the upper part of the second medium spiral heat exchange chamber 13 in a through-hole and perforated manner, the second medium outlet pipe 6 on the end cover 2 is connected to the second medium return pipe 17, and is connected to the lower part of the second medium spiral heat exchange chamber 13 in a through-hole and perforated manner.

[0017] The non-sealed inner support cover 10 and the outer support cover 11 are both composed of two symmetrically arranged protection plates, and a gap for water flow to pass through is provided between the two ends of the two protection plates.

[0018] The walls of the first medium spiral heat exchange chamber 12 and the second medium spiral heat exchange chamber 13 are both provided with a corrugated structure to increase the heat exchange area.

[0019] In the three-way spiral shell and tube heat exchanger of the present invention, the first and second media respectively enter the upper part of the first and second medium spiral heat exchange chambers through pipelines, and then flow back from the lower part of the first and second medium spiral heat exchange chambers. In the process, heat exchange is performed with water, thereby realizing three-way heat exchange, and the heat exchange area is large. The first and second medium spiral heat exchange chambers have good convection, are not prone to dead zones, have high heat exchange efficiency, good overall strength, and strong practicality, and are worthy of promotion.

[0020] 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. Three-way spiral shell and tube heat exchanger, characterized in that: The invention comprises a cylinder and end covers arranged at both ends of the cylinder, a first medium inlet pipe and a first medium outlet pipe as well as a second medium inlet pipe and a second medium 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, the heat exchange plate group comprises a non-sealed inner support cover and an outer support cover, a first medium spiral heat exchange cavity and a second medium spiral heat exchange cavity are arranged between the inner support cover and the outer support cover, the pitch and radius of the spiral heat exchange cavity of the second medium are both smaller than the spiral heat exchange cavity of the first medium, the outer periphery of the spiral heat exchange cavity of the first medium is in contact with the outer support cover and is fixed by the outer support cover, the inner periphery of the spiral heat exchange cavity of the second medium is in contact with the inner support cover and is fixed by the inner support cover, The upper end of the outer support cover is connected to the water inlet on the cylinder, and the lower end is connected to the water outlet on the cylinder; the first medium inlet connecting pipe on the end cover is connected to the first medium distribution pipe, and is connected to the upper part of the first medium spiral heat exchange chamber in a through-hole and perforated manner; the first medium outlet connecting pipe on the end cover is connected to the first medium return pipe, and is connected to the lower part of the first medium spiral heat exchange chamber in a through-hole and perforated manner; the second medium inlet connecting pipe on the end cover is connected to the second medium distribution pipe, and is connected to the upper part of the second medium spiral heat exchange chamber in a through-hole and perforated manner; the second medium outlet connecting pipe on the end cover is connected to the second medium return pipe, and is connected to the lower part of the second medium spiral heat exchange chamber in a through-hole and perforated manner.

2. The three-way spiral shell and tube heat exchanger according to claim 1, characterized in that: The non-sealed inner support cover and the outer support cover are both composed of two symmetrically arranged protection plates, and a gap for water flow to pass through is provided between the two ends of the two protection plates.

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