Shell-and-tube heat exchanger of primary brine preheating system

Abstract

The utility model discloses a shell-and-tube heat exchanger of a primary brine preheating system, which comprises a shell, tube plates are arranged at two ends of the shell, and tube boxes are arranged on the tube plates. A heat exchange cylinder sleeves the outer wall of the shell and is connected between the two groups of tube plates, a heat exchange cavity is formed between the heat exchange cylinder and the shell, a heat exchange liquid inlet pipeline and a heat exchange liquid outlet pipeline are arranged on the heat exchange cylinder, the heat exchange liquid inlet pipeline and the heat exchange liquid outlet pipeline are communicated with an inner cavity of the heat exchange cavity, and the heat exchange liquid inlet pipeline and the heat exchange liquid outlet pipeline are communicated with the inner cavity of the heat exchange cavity. The heat exchange liquid outlet pipeline is communicated with the group of pipe boxes; the brine heat exchanger has the advantages that brine can conveniently absorb heat dissipated on the surface of the shell through the heat exchange cavity, the overall heat recovery efficiency and the energy utilization rate of a system are improved, the exchange area is effectively increased under the condition that no land is occupied, and then the heat transfer efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a shell and tube heat exchanger of a primary brine preheating system. Background Art

[0002] In the production process of primary brine, the brine temperature needs to be raised to 42°C to speed up the reaction of the two added alkalis with the calcium and magnesium ions in the brine. The method for raising the brine temperature is generally to increase the temperature through heat exchange in a shell and tube heat exchanger.

[0003] During the heat exchange process of the existing shell and tube heat exchanger, the heat recovery efficiency and energy utilization rate are poor, and the shell surface will also become high temperature, which will have a certain impact on the safety of the operators. In view of this, the utility model proposes a shell and tube heat exchanger for a primary brine preheating system to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a shell and tube heat exchanger for a primary brine preheating system to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A shell and tube heat exchanger of a primary brine preheating system comprises a shell, tube sheets are arranged at both ends of the shell, and tube boxes are arranged on the tube sheets;

[0007] The outer wall of the shell is sleeved with a heat exchange tube, and the heat exchange tube is connected between two groups of tube sheets. A heat exchange cavity is arranged between the heat exchange tube and the shell. A heat exchange liquid inlet pipe and a heat exchange liquid outlet pipe are arranged on the heat exchange tube. The heat exchange liquid inlet pipe and the heat exchange liquid outlet pipe are connected with the inner cavity of the heat exchange cavity, and the heat exchange liquid outlet pipe is connected with a group of pipe boxes.

[0008] As an improvement of the above technical solution, a shell liquid inlet pipe and a shell liquid outlet pipe are arranged on the outer wall of the shell, and the shell liquid inlet pipe and the shell liquid outlet pipe are connected to the inner cavity of the shell.

[0009] As an improvement of the above technical solution, the pipe box is provided with a pipe box connecting pipe, and a bend pipe is provided between the pipe box connecting pipe and the heat exchange liquid outlet pipe;

[0010] The elbow is connected with the pipe box connecting pipe and the heat exchange liquid outlet pipe flange.

[0011] As an improvement of the above technical solution, the heat exchange liquid inlet pipe and the heat exchange liquid outlet pipe are symmetrically arranged on the outer wall of the heat exchange cylinder.

[0012] As an improvement of the above technical solution, a spiral blade is arranged in the heat exchange cavity, and the spiral blade is connected between the shell and the heat exchange cylinder.

[0013] As an improvement of the above technical solution, the outer wall of the curved pipe is provided with thermal insulation cotton.

[0014] As an improvement of the above technical solution, the heat exchange liquid inlet pipeline is arranged at an end away from the elbow.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] When preheating brine during the salt production process, high-temperature fluid is introduced into the shell, and then brine is introduced into the heat exchange liquid inlet pipe, so that the brine fills the heat exchange cavity for primary heating, and is introduced into a group of pipe boxes through the heat exchange liquid outlet pipe, and the brine enters another group of pipe boxes through the heat exchange tubes between the two groups of tube sheets for secondary heating;

[0017] The heat exchange chamber arranged as above can facilitate the brine to absorb the heat dissipated from the shell surface, thereby improving the overall heat recovery efficiency and energy utilization rate of the system. At the same time, without occupying space, the exchange area is effectively increased, thereby improving the heat transfer efficiency. The heat exchange tube can serve as an insulating layer to reduce the radiation loss of heat energy to the external environment, keep the temperature of the outer surface of the heat exchanger lower, effectively improve the safety of operators, and also facilitate thermal management of the factory environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the connection between the spiral blade and the housing of the utility model;

[0020] Figure 3 This is a front view of the heat exchange tube of the utility model;

[0021] Figure 4 For this utility model Figure 3 Sectional view of AA in the middle;

[0022] Figure 5 For this utility model Figure 3 Cross-sectional view of BB.

[0023] In the figure: 10, heat exchange cylinder; 11, heat exchange liquid outlet pipe; 12, heat exchange liquid inlet pipe; 20, pipe box; 21, pipe box connecting pipe; 30, elbow; 40, shell; 41, shell liquid inlet pipe; 42, shell liquid outlet pipe; 43, tube sheet; 50, spiral blade; 60, heat exchange chamber. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example:

[0026] like Figure 1-5 As shown, this embodiment proposes a shell and tube heat exchanger of a primary brine preheating system, comprising a shell 40, with tube sheets 43 disposed at both ends of the shell 40, and a tube box 20 disposed on the tube sheet 43;

[0027] The outer wall of the shell 40 is sleeved with a heat exchange tube 10, and the heat exchange tube 10 is connected between two groups of tube sheets 43. A heat exchange cavity 60 is arranged between the heat exchange tube 10 and the shell 40. A heat exchange liquid inlet pipe 12 and a heat exchange liquid outlet pipe 11 are arranged on the heat exchange tube 10. The heat exchange liquid inlet pipe 12 and the heat exchange liquid outlet pipe 11 are connected to the inner cavity of the heat exchange cavity 60, and the heat exchange liquid outlet pipe 11 is connected to a group of pipe boxes 20.

[0028] In this embodiment, when preheating the brine during the salt production process, a high-temperature fluid is introduced into the shell 40, and then brine is introduced into the heat exchange liquid inlet pipe 12, so that the brine fills the heat exchange cavity 60 for primary heating, and is introduced into a group of pipe boxes 20 through the heat exchange liquid outlet pipe 11, and the brine enters another group of pipe boxes 20 through the heat exchange tubes between the two groups of tube sheets 43 for secondary heating;

[0029] The heat exchange chamber 60 arranged as above can facilitate the brine to absorb the heat dissipated from the surface of the shell 40, thereby improving the overall heat recovery efficiency and energy utilization rate of the system. At the same time, without occupying space, the exchange area is effectively increased, thereby improving the heat transfer efficiency. The heat exchange tube 10 can serve as an insulating layer to reduce the radiation loss of heat energy to the external environment, keep the temperature of the outer surface of the heat exchanger lower, effectively improve the safety of the operators, and also facilitate the thermal management of the factory environment.

[0030] Specifically, a shell liquid inlet pipe 41 and a shell liquid outlet pipe 42 are provided on the outer wall of the shell 40 , and the shell liquid inlet pipe 41 and the shell liquid outlet pipe 42 are communicated with the inner cavity of the shell 40 .

[0031] In this embodiment, the shell liquid inlet pipe 41 can facilitate high-temperature fluid to enter the shell 40 for heat exchange treatment, and the shell liquid outlet pipe 42 can facilitate high-temperature fluid to be discharged from the shell 40.

[0032] Specifically, the pipe box 20 is provided with a pipe box connecting pipe 21, and a bend pipe 30 is provided between the pipe box connecting pipe 21 and the heat exchange liquid outlet pipe 11;

[0033] The elbow 30 is flange-connected to the pipe box connecting pipe 21 and the heat exchange liquid outlet pipe 11 .

[0034] In this embodiment, the bent pipe 30 can facilitate the introduction of brine from the heat exchange chamber 60 into the pipe box 20 .

[0035] Specifically, the heat exchange liquid inlet pipe 12 and the heat exchange liquid outlet pipe 11 are symmetrically arranged on the outer wall of the heat exchange cylinder 10 .

[0036] Specifically, a spiral blade 50 is disposed in the heat exchange chamber 60 , and the spiral blade 50 is connected between the shell 40 and the heat exchange cylinder 10 .

[0037] In this embodiment, the spiral blades 50 can form a flow channel in the heat exchange chamber 60 to facilitate the flow of brine for heat exchange treatment.

[0038] Specifically, the outer wall of the curved pipe 30 is provided with thermal insulation cotton; the heat exchange liquid inlet pipe 12 is arranged at an end away from the curved pipe 30 .

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shell and tube heat exchanger for a primary brine preheating system, characterized in that: It comprises a shell (40), with tube sheets (43) being arranged at both ends of the shell (40), and a tube box (20) being arranged on the tube sheet (43); The outer wall of the shell (40) is provided with a heat exchange tube (10), the heat exchange tube (10) is connected between two groups of tube sheets (43), a heat exchange chamber (60) is provided between the heat exchange tube (10) and the shell (40), a heat exchange liquid inlet pipe (12) and a heat exchange liquid outlet pipe (11) are provided on the heat exchange tube (10), the heat exchange liquid inlet pipe (12) and the heat exchange liquid outlet pipe (11) are in communication with the inner cavity of the heat exchange chamber (60), and the heat exchange liquid outlet pipe (11) is in communication with a group of pipe boxes (20).

2. The shell and tube heat exchanger of the primary brine preheating system according to claim 1, characterized in that: A shell liquid inlet pipe (41) and a shell liquid outlet pipe (42) are provided on the outer wall of the shell (40); the shell liquid inlet pipe (41) and the shell liquid outlet pipe (42) are in communication with the inner cavity of the shell (40).

3. The shell and tube heat exchanger of the primary brine preheating system according to claim 1, characterized in that: The pipe box (20) is provided with a pipe box connecting pipe (21), and a bend pipe (30) is provided between the pipe box connecting pipe (21) and the heat exchange liquid outlet pipe (11); The elbow (30) is flange-connected to the pipe box connecting pipe (21) and the heat exchange liquid outlet pipe (11).

4. The shell and tube heat exchanger of the primary brine preheating system according to claim 1, characterized in that: The heat exchange liquid inlet pipe (12) and the heat exchange liquid outlet pipe (11) are symmetrically arranged on the outer wall of the heat exchange cylinder (10).

5. The shell and tube heat exchanger of the primary brine preheating system according to claim 1, characterized in that: A spiral blade (50) is arranged in the heat exchange cavity (60), and the spiral blade (50) is connected between the shell (40) and the heat exchange cylinder (10).

6. The shell and tube heat exchanger of the primary brine preheating system according to claim 3, characterized in that: The outer wall of the curved pipe (30) is provided with thermal insulation cotton.

7. The shell and tube heat exchanger of the primary brine preheating system according to claim 1, characterized in that: The heat exchange liquid inlet pipe (12) is arranged at an end away from the elbow (30).

Images