CN-122015544-A - Shell-and-tube heat exchanger and heat exchange system thereof

Abstract

The invention provides a shell-and-tube heat exchanger and a heat exchange system thereof, wherein the heat exchanger comprises a shell, a heat tube, a liquid inlet tube, a liquid outlet tube, a left plug and a right plug, openings at two ends of the shell are respectively provided with the left plug and the right plug, the liquid inlet tube and the liquid outlet tube are respectively arranged at the upper side and the lower side of the shell, the heat tube comprises a left heat tube and a right heat tube, the heat absorbing end of the left heat tube is fixed on the left plug, the heat releasing end extends towards the right plug, the heat absorbing end of the right heat tube is fixed on the right plug, the heat releasing end extends towards the left plug, the heat absorbing ends of the left heat tube and the right heat tube are thermally connected with a heat source, and the left heat tube and the right heat tube are arranged at intervals when viewed from the cross section of the shell. The invention realizes uniform heat exchange on the whole and improves the heat exchange effect.

Inventors

• CHEN ZAN
• CHEN YAN

Assignees

• 青岛酒店管理职业技术学院
• 山东大学

Dates

Publication Date

20260512

Application Date

20260317

Claims (10)

1. 1. The shell-and-tube heat exchanger comprises a shell, a heat pipe, a liquid inlet pipe, a liquid outlet pipe, a left plug and a right plug, wherein openings at two ends of the shell are respectively provided with the left plug and the right plug, and the liquid inlet pipe and the liquid outlet pipe are respectively arranged at the upper side and the lower side of the shell.
2. 2. The shell and tube heat exchanger as set forth in claim 1 wherein the left heat tubes are distributed in an equilateral triangle as viewed in cross section of the shell and the right heat tubes are disposed at the center of the triangle of the left heat tubes.
3. 3. The shell and tube heat exchanger as set forth in claim 1 wherein the left heat tubes are square in distribution and the right heat tubes are centered in the square of the left heat tubes.
4. 4. The shell and tube heat exchanger as set forth in claim 1, wherein the heat source is a resistive heater disposed inboard of the left and right plugs.
5. 5. The shell and tube heat pipe exchanger as claimed in claim 4, wherein the left and right plugs are made of a heat insulating material.
6. 6. The shell and tube heat pipe exchanger as claimed in claim 4 wherein one side of the resistive heater is against the left plug or the right plug and the other side is thermally connected to the fluid.
7. 7. The shell and tube heat exchanger as set forth in claim 1 including a baffle plate comprising a first baffle plate extending from top to bottom and a second baffle plate extending from bottom to top, the first baffle plate and the second baffle plate being spaced apart.
8. 8. The shell and tube heat exchanger as set forth in claim 1 wherein the end of the heat releasing end of the left heat tube is not thermally connected to the right heat source and the end of the heat releasing end of the right heat tube is not thermally connected to the left heat source.
9. 9. A heat exchange system comprising a circulation pipeline and a heat exchanger, wherein the heat exchanger is the heat exchanger according to any one of claims 1 to 8, the circulation pipeline is connected with a fluid inlet pipe and a liquid outlet pipe of the heat exchanger, a guiding pipeline is arranged on the circulation pipeline connected with the liquid outlet pipe and used for guiding out fluid of the circulation pipeline, and a guiding valve is arranged on the guiding pipeline.
10. 10. The heat exchange system as set forth in claim 9, wherein a temperature sensor is provided on the liquid outlet pipe for detecting an outlet temperature of the fluid, and opening and closing of the outlet valve is determined based on the temperature detected by the temperature sensor.

Description

Shell-and-tube heat exchanger and heat exchange system thereof Technical Field The invention belongs to the field of heat exchange, and particularly relates to a shell-and-tube heat pipe heat exchanger and a heat exchange system thereof. Background The shell-and-tube heat exchanger is widely used in industries such as electric power, chemical engineering, oil refining and the like, and accounts for about 70% of the total amount of the heat exchanger. Currently, most shell-and-tube heat exchangers are constructed from a tube box, a tube shell, a tube sheet, heat exchange tubes, fluid inlets and outlets, and the like. Wherein, the two ends of the heat exchange tube pass through and are connected between the two tube plates in a sealing way, and the two tube boxes are respectively connected to the two tube plates in a sealing way (at one side of the tube plate which is not connected with the heat exchange tube). The tube shell is arranged outside the heat exchange tube and between the two tube plates, and forms a sealed heat exchange cavity together with the two tube plates and the heat exchange tube. A fluid requiring heat exchange enters from an inlet on one tube box, enters the inner side of a heat exchange tube connected with a tube plate through a tube box space, is flushed in the inner side of the heat exchange tube longitudinally, enters the tube box on the other side after heat exchange of the heat exchange tube, and is discharged through the tube box space and a fluid outlet connected with the tube box. The other fluid needing heat exchange enters the tube shell through the fluid inlet connected with the tube shell, and washes the outer side of the heat exchange tube to exchange heat, and then is discharged out of the tube shell through the fluid outlet connected with the tube shell. The heat pipe is a phase change process (i.e. utilizing the latent heat of evaporation and condensation of liquid) by which the medium condenses at the cold end after the hot end evaporates, so that heat is rapidly conducted. A typical heat pipe consists of a tube shell, a wick, and an end cap. The heat pipe is pumped into negative pressure state and filled with proper liquid with low boiling point and easy volatilization. The walls of the tube have a wick that is constructed of a capillary porous material. When one end of the heat pipe is heated, the liquid in the capillary tube is quickly vaporized, the vapor flows to the other end under the power of thermal diffusion, and is condensed at the cold end to release heat, and the liquid flows back to the evaporating end along the porous material by capillary action, so that the circulation is not stopped until the temperatures at the two ends of the heat pipe are equal (at the moment, the thermal diffusion of the vapor is stopped). This cycle is rapid and heat is conducted continuously. In the prior art, CN102288055A discloses a heat pipe shell type heat exchanger, which comprises a pipe shell, a fluid inlet and a fluid outlet which are formed in the pipe shell, a pipe plate and a heat exchange pipe which is fixed on the pipe plate, wherein a closed heat exchange cavity is formed in the pipe shell, the heat exchange pipe is arranged in the heat exchange cavity, the pipe plate divides the heat exchange cavity into a first heat exchange cavity and a second heat exchange cavity, part of the heat exchange pipe is positioned in the first heat exchange cavity and part of the heat exchange pipe is positioned in the second heat exchange cavity, the first heat exchange cavity is provided with a first fluid inlet and a first fluid outlet, the second heat exchange cavity is provided with a second fluid inlet and a second fluid outlet, and the heat exchange pipe is a heat pipe. The invention adopts the high-efficiency heat pipe, improves the structure of the shell-and-tube heat exchanger, ensures that the heat pipe, the tube plate and the connecting part of the tube shell and the tube plate of the heat exchanger do not generate temperature difference stress, can adapt to heat exchange between large temperature difference fluids, adopts transverse scouring on both sides, and has high heat exchange efficiency, simple structure and convenient arrangement. CN118602848A provides an intelligent control heat exchanger system, a bypass pipeline between a heat exchanger and a main pipeline is provided with an inlet valve for controlling the opening and closing of the inlet pipeline of the heat exchanger and the magnitude of fluid flow, a bypass pipeline between an extraction pipeline and the main pipeline is provided with an outlet through valve for opening and closing of the bypass pipeline, and the system also comprises a controller which is in information connection with a temperature sensor, the extraction valve, the main valve, the inlet valve and the outlet valve. According to the invention, the intelligent control heat exchanger system is arranged, so that the led-out fluid can be in a c