Electrolytic aluminum industry thermoelectric conversion and waste heat utilization device
By combining thermoelectric conversion and heat exchanger systems, thermoelectric materials are used to convert the heat energy in flue gas into electrical energy and heat water, solving the problem of low heat energy utilization in the electrolytic aluminum industry and realizing the efficient utilization and recycling of waste heat.
Patent Information
- Application Number
- CN202422619476.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing technologies in the electrolytic aluminum industry have low thermal energy utilization rates and lack coordinated design of thermoelectric conversion and heat exchange, leading to energy waste and thermal pollution problems.
The system combines a thermoelectric conversion system and a heat exchanger system. It uses thermoelectric materials such as bismuth telluride and antimony telluride to convert the heat energy in the flue gas into electrical energy and store it. The heat exchanger is then used to heat the cold water, thus forming a cycle.
It improves the efficiency of waste heat utilization, realizes the generation of electricity and the supply of hot water, and reduces energy waste and thermal pollution.
Smart Images
Figure CN223649702U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat utilization technology, and in particular to a device for utilizing thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry. Background Technology
[0002] In the electrolytic aluminum production process, a large amount of heat energy is emitted in the form of waste gas, resulting in energy waste and thermal pollution. While existing technologies can partially recover heat from flue gas, they are usually limited to heat exchange, leading to low utilization rates of the heat energy within the flue gas. Thermoelectric conversion technology, which can directly convert temperature differences into electrical energy, has great potential, but currently lacks a system design that combines thermoelectric conversion with heat energy utilization. Therefore, improving the efficiency of industrial waste heat recovery and utilization, especially through synergistic design between thermoelectric conversion and heat exchange, is a crucial issue facing the current technological field. Based on this, this invention proposes a device for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry. Utility Model Content
[0003] The purpose of this invention is to provide a device that utilizes thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry to solve the aforementioned problems.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] This utility model discloses a device for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry, comprising a flue, wherein a thermoelectric conversion system is installed in the flue; one end of the thermoelectric conversion system is connected to a cold water inlet pipe, and the other end is connected to a heat exchanger system; the heat exchanger system is connected to an insulated water tank, and the heat exchanger system is connected to the flue through a pipeline.
[0006] Furthermore, the thermoelectric conversion system includes several water pipes connected in parallel, and several thermoelectric conversion modules are equidistantly arranged on the water pipes; the cold end of the thermoelectric conversion module is connected to the water pipe, and the hot end is fixedly connected to the inner wall of the flue; several thermoelectric conversion modules are electrically connected to an inverter, and the inverter is electrically connected to a battery.
[0007] Furthermore, the thermoelectric conversion module uses bismuth telluride and antimony telluride as thermoelectric materials.
[0008] Furthermore, the heat exchanger system includes a shell-and-tube heat exchanger, which is provided with a cold water inlet and a hot water outlet. The cold water inlet is connected to the thermoelectric conversion system, and the hot water outlet is connected to the insulated water tank. The shell-and-tube heat exchanger is also provided with a flue inlet and a flue outlet, and the flue inlet is connected to the flue.
[0009] Furthermore, a smart valve is installed on the cold water inlet pipe.
[0010] Furthermore, temperature sensors are installed on the pipes connecting the thermoelectric conversion system and the heat exchanger system, as well as inside the flue.
[0011] Furthermore, the insulated water tank is connected to a hot water outlet pipe.
[0012] Compared with the prior art, the beneficial technical effects of this utility model are as follows:
[0013] This utility model utilizes a device for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry. It generates and stores electrical energy through multiple thermoelectric conversion modules, while simultaneously using the waste heat in the flue gas to heat cold water and provide hot water output. This realizes the recycling of cold water in the thermoelectric conversion and heat exchange process, thereby significantly improving the efficiency of waste heat utilization. Attached Figure Description
[0014] The present invention will be further described below with reference to the accompanying drawings.
[0015] Figure 1 This is a front view of the device for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to this utility model;
[0016] Explanation of reference numerals in the attached diagram: 1. Cold water inlet pipe; 2. Intelligent valve; 3. Thermoelectric conversion module; 4. Temperature sensor; 5. Cold water inlet; 6. Shell and tube heat exchanger; 7. Hot water outlet; 8. Flue inlet; 9. Flue outlet; 10. Insulated water tank; 11. Hot water outlet pipe; 12. Inverter; 13. Battery; 14. Flue. Detailed Implementation
[0017] like Figure 1 As shown, a device for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry includes a flue 14, in which a thermoelectric conversion system is installed; one end of the thermoelectric conversion system is connected to a cold water inlet pipe 1, and the other end is connected to a heat exchanger system; the heat exchanger system is connected to an insulated water tank 10, and the heat exchanger system is connected to the flue 14 through a pipeline.
[0018] The thermoelectric conversion system includes several water pipes connected in parallel. Several thermoelectric conversion modules 3 are equidistantly installed on the water pipes. Each thermoelectric conversion module 3 converts heat difference into electrical energy through the Seebeck effect. Specifically, the cold end of each thermoelectric conversion module 3 is connected to the water pipes to maintain a temperature difference; the hot end is fixedly connected to the inner wall of the flue 14, generating current through the temperature difference effect of the flue gas heat source. Several thermoelectric conversion modules 3 are electrically connected to an inverter 12. The direct current generated by the thermoelectric conversion modules 3 is converted into usable alternating current by the inverter. The inverter 12 is electrically connected to a battery 13. The electricity after inverter treatment is stored in the battery 13 for backup power or direct supply to the system's power needs. To ensure stability, the power management system is equipped with sensors to monitor the operating status of each thermoelectric module and adjust current output and load distribution.
[0019] The thermoelectric conversion module 3 uses thermoelectric materials such as bismuth telluride (Bi2Te3) and antimony telluride (Sb2Te3).
[0020] The heat exchanger system includes a shell-and-tube heat exchanger 6. The shell-and-tube heat exchanger operates based on the fundamental principle of heat conduction, exchanging heat energy between the internal tube bundle and the outer shell to meet the heat exchange requirements of various industrial applications. The shell-and-tube heat exchanger 6 is equipped with a cold water inlet 5 and a hot water outlet 7. The cold water inlet 5 is connected to a thermoelectric conversion system, and the hot water outlet 7 is connected to an insulated water tank 10. The shell-and-tube heat exchanger 6 is also equipped with a flue inlet 8 and a flue outlet 9, with the flue inlet 8 connected to the flue 14.
[0021] A smart valve 2 is installed on the cold water inlet pipe 1.
[0022] Temperature sensors 4 are installed on the pipes connecting the thermoelectric conversion system and the heat exchanger system, as well as inside the flue 14, to monitor the temperature difference of the thermoelectric conversion module 3 and the thermal efficiency of the entire system in real time, ensuring that the system operates in a high-efficiency state while ensuring safety.
[0023] The insulated water tank 10 is connected to the hot water outlet pipe 11. The insulated water tank can maintain the temperature of the hot water. When hot water is needed, hot water flows out from the hot water outlet pipe 11. After use, the cold water is cooled and re-enters the cold water inlet system, forming a circulation loop and further improving water utilization.
[0024] The operation process of this utility model is as follows:
[0025] First, cold water enters the thermoelectric conversion system through the cold water inlet pipe 1. Current is generated using the temperature difference effect. The direct current generated by the thermoelectric conversion module 3 is converted into usable alternating current by the inverter 12 and stored in the battery 13. Then, after the thermoelectric conversion, the cold water continues to flow, entering the shell-and-tube heat exchanger 6 through the cold water inlet 5. Flue gas enters the shell-and-tube heat exchanger 6 through the flue inlet 8. Through heat exchange, the cold water is heated into hot water and flows out through the hot water outlet 7. At this point, the heat from the flue gas is effectively recovered, and the cooled flue gas is discharged into the chimney through the flue outlet 9. Finally, the hot water, after passing through the heat exchanger, enters the insulated water tank 10 for storage. When hot water is needed, it flows out through the hot water outlet pipe 11.
[0026] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.
Claims
1. A device for utilizing thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry, characterized in that: Includes a flue (14), in which a thermoelectric conversion system is installed; one end of the thermoelectric conversion system is connected to a cold water inlet pipe (1), and the other end is connected to a heat exchanger system; the heat exchanger system is connected to an insulated water tank (10), and the heat exchanger system is connected to the flue (14) through a pipeline.
2. The apparatus for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to claim 1, characterized in that: The thermoelectric conversion system includes several water pipes connected in parallel, and several thermoelectric conversion modules (3) are equidistantly arranged on the water pipes; the cold end of the thermoelectric conversion module (3) is connected to the water pipe, and the hot end is fixedly connected to the inner wall of the flue (14); several thermoelectric conversion modules (3) are electrically connected to an inverter (12), and the inverter (12) is electrically connected to a battery (13).
3. The apparatus for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to claim 1, characterized in that: The heat exchanger system includes a shell-and-tube heat exchanger (6), which is provided with a cold water inlet (5) and a hot water outlet (7). The cold water inlet (5) is connected to the thermoelectric conversion system, and the hot water outlet (7) is connected to the insulated water tank (10). The shell-and-tube heat exchanger (6) is also provided with a flue inlet (8) and a flue outlet (9), and the flue inlet (8) is connected to the flue (14).
4. The apparatus for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to claim 1, characterized in that: A smart valve (2) is installed on the cold water inlet pipe (1).
5. The apparatus for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to claim 1, characterized in that: Temperature sensors (4) are installed on the pipes connecting the thermoelectric conversion system and the heat exchanger system, as well as inside the flue (14).
6. The apparatus for thermoelectric conversion and waste heat utilization in the electrolytic aluminum industry according to claim 1, characterized in that: The insulated water tank (10) is connected to the hot water outlet pipe (11).