Three-way spiral shell-and-tube heat exchanger
Technical Field
The invention belongs to the field of heat exchanger manufacturing, and particularly relates to a three-way spiral shell-and-tube heat exchanger.
Background
The shell-and-tube heat exchanger is also called a tubular heat exchanger, and is a dividing wall type heat exchanger which takes the wall surface of a tube bundle sealed in a shell as a heat transfer surface. However, most of the existing shell-and-tube heat exchangers can only realize heat exchange of two fluids, and have the problems of dead zones and poor backflow, so people hope to find a better way to solve the problems.
Disclosure of Invention
Aiming at the technical problem, the invention provides a three-way spiral shell-and-tube heat exchanger.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the three-way spiral shell-and-tube heat exchanger comprises a cylinder body and end covers arranged at two ends of the cylinder body, wherein a first medium inlet connecting tube, a first medium outlet connecting tube, a second medium inlet connecting tube and a second medium outlet connecting tube are symmetrically arranged on one end cover, a water inlet is arranged at the upper part of the cylinder body, a water outlet is arranged at the lower part of the cylinder body, a heat exchange plate group is arranged in the cylinder body and comprises an inner supporting cover and an outer supporting cover which are not sealed, a first medium spiral heat exchange cavity and a second medium spiral heat exchange cavity are arranged between the inner supporting cover and the outer supporting cover, the pitch and the radius of the spiral heat exchange cavity of a second medium are smaller than those of the first medium spiral heat exchange cavity, the periphery of the first medium spiral heat exchange cavity is in contact with the outer supporting cover and fixed through the outer supporting cover, and the periphery of the second medium spiral heat exchange cavity is in contact with the inner supporting, the upper end of the outer support cover is communicated with a water inlet on the cylinder body, and the lower end of the outer support cover is communicated with a water outlet on the cylinder body; a first medium distributing pipe is connected to a first medium inlet connecting pipe on the end cover and communicated with the upper part of the first medium spiral heat exchange cavity in a penetrating and perforating communication mode, and a first medium return pipe is connected to a first medium outlet connecting pipe on the end cover and communicated with the lower part of the first medium spiral heat exchange cavity in a penetrating and perforating communication mode; and a second medium outlet connecting pipe on the end cover is connected with a second medium return pipe and is communicated with the lower part of the second medium spiral heat exchange cavity in a penetrating and perforating way.
Preferably, the inner and outer non-sealed supporting covers are both composed of two symmetrically arranged protecting plates, and a gap for water flow to pass through is arranged between the two ends of each protecting plate.
Preferably, the walls of the first medium spiral heat exchange cavity and the second medium spiral heat exchange cavity are both provided with a raised grain structure to increase the heat exchange area.
Due to the adoption of the technical scheme, the invention has the following technical effects:
according to the three-way type spiral shell-and-tube heat exchanger, the first medium and the second medium respectively enter the upper part of the first medium spiral heat exchange cavity through the pipeline and then return from the lower part of the first medium spiral heat exchange cavity, heat exchange is carried out with water in the process, three-way heat exchange is realized, the heat exchange area is large, convection is good in the first medium spiral heat exchange cavity and the second medium spiral heat exchange cavity, dead zones are not easy to generate, the heat exchange efficiency is high, the overall strength is good, the practicability is high, and the three-way type spiral shell-and-tube heat exchanger is worthy.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a heat exchanger plate set;
fig. 3 is a cross-sectional view of fig. 2.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
As shown in fig. 1-3, a three-way spiral shell-and-tube heat exchanger includes a cylinder 1 and end caps 2 disposed at two ends of the cylinder 1, a first medium inlet connection tube 3, a first medium outlet connection tube 4, a second medium inlet connection tube 5 and a second medium outlet connection tube 6 are symmetrically disposed on the end cap 1 at one side, a water inlet 7 is disposed at the upper portion of the cylinder 1, a water outlet 8 is disposed at the lower portion of the cylinder, a heat exchanger set 9 is disposed in the cylinder 1, the heat exchanger set includes an inner support cover 10 and an outer support cover 11 which are not sealed, a first medium spiral heat exchange cavity 12 and a second medium spiral heat exchange cavity 13 are disposed between the inner support cover 10 and the outer support cover 11, the pitch and radius of the second medium spiral heat exchange cavity 13 are both smaller than those of the first medium spiral heat exchange cavity 12, the 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 and is fixed through the inner support cover 10, the upper end of the outer support cover 11 is communicated with the water inlet 7 on the cylinder body 1, and the lower end of the outer support cover is communicated with the water outlet 8 on the cylinder body 1; a first medium distributing pipe 14 is connected to the first medium inlet connecting pipe 3 on the end cover 2 and is communicated with the upper part of the first medium spiral heat exchange cavity 12 in a penetrating and perforating communication mode, and a first medium return pipe 15 is connected to the first medium outlet connecting pipe 4 on the end cover 2 and is communicated with the lower part of the first medium spiral heat exchange cavity 12 in a penetrating and perforating communication mode; a second medium distributing pipe 16 is connected to the second medium inlet connecting pipe 5 on the end cover 2 and is communicated with the upper part of the second medium spiral heat exchange cavity 13 in a penetrating and perforating communication mode, and a second medium return pipe 17 is connected to the second medium outlet connecting pipe 6 on the end cover 2 and is communicated with the lower part of the second medium spiral heat exchange cavity 13 in a penetrating and perforating communication mode.
The inner and outer non-sealed supporting covers 10 and 11 are formed by two symmetrically arranged protecting plates, and gaps for water flow to pass through are arranged between the two ends of the two protecting plates.
The walls of the first medium spiral heat exchange cavity 12 and the second medium spiral heat exchange cavity 13 are both provided with a wave grain structure to increase the heat exchange area.
According to the three-way type spiral shell-and-tube heat exchanger, the first medium and the second medium respectively enter the upper part of the first medium spiral heat exchange cavity through the pipeline and then return from the lower part of the first medium spiral heat exchange cavity, heat exchange is carried out with water in the process, three-way heat exchange is realized, the heat exchange area is large, convection is good in the first medium spiral heat exchange cavity and the second medium spiral heat exchange cavity, dead zones are not easy to generate, the heat exchange efficiency is high, the overall strength is good, the practicability is high, and the three-way type spiral shell-and-tube heat exchanger is worthy.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.