|
Product Details:
|
Shell and tube molten salt heat exchanger is a device used for heat exchange between high-temperature molten salt and other media. Its structure includes tube bundle, shell and head, and it is resistant to high temperature and corrosion. It has high heat transfer efficiency and can operate stably under the condition of 200°C to 700°C. It is widely used in solar thermal power generation, chemical industry, energy storage and metallurgical industry. The modular design of the equipment is easy to maintain and is suitable for industrial needs of processing high-temperature thermal energy.
The following is a detailed introduction to some details of this equipment:
1. Structural Analysis
The equipment adopts a typical shell and tube structure, with the following specific features:
1.1.Shell
The outside is a large cylindrical shell with a large flow space for accommodating the shell-side medium (usually molten salt or heating/cooling medium).
The surface may have an insulation layer (bare metal when not coated) to reduce heat loss.
1.2.Tube Bundle
A large number of U-shaped heat exchange tubes are arranged inside to provide a large heat exchange area, and molten salt usually flows through the tube side.
The heat exchange tube material is high-temperature resistant stainless steel (such as 304 or 316L) or nickel-based alloy, which can resist the corrosion of molten salt.
1.3.Head
The two ends are designed with heads to separate and guide the in and out of the tube side fluid.
The flange connection on the head facilitates the installation, disassembly and maintenance of the pipeline.
1.4.Support structure
The bottom of the heat exchanger is equipped with a welded support to fix the equipment and ensure the stability of the equipment during operation.
1.5.Interface pipeline
The figure shows multiple pipeline interfaces for the in and out of molten salt and working fluids (such as water or heat transfer oil). Temperature and pressure monitoring instruments and valves are usually standard.
2. Technical parameters (reference industrial standards)
|
No. |
Parameter |
Typical value range |
|
|
1 |
Temperature range |
Molten salt operating temperature |
200°C to 600°C, (special designs over 700°C) |
|
Temperature of shell-side or tube-side cooling medium |
Adjust according to demand |
||
|
2 |
Pressure range |
Shell-side pressure |
0.6~2.5 MPa |
|
Tube-side pressure |
1.0~3.0 MPa |
||
|
3 |
Material |
Heat exchange tube material |
304/316L)or high-nickel alloy |
|
Shell material |
carbon steel or stainless steel |
||
|
4 |
Flow rate design |
Molten salt tube-side flow rate |
2~5 m/s |
|
Shell-side flow rate |
adjusted according to process requirements |
||
3. Application scenarios
This type of heat exchanger is widely used for the storage and heat transfer of high-temperature molten salt media. The following are typical application areas:
3.1.Photothermal power generation
In tower and trough photothermal power generation systems, it is used for heat exchange between molten salt heat storage tanks and steam generators.
Provide a stable supply of heat energy to ensure the operation of the power generation system even in the absence of light.
3.2.Chemical industry
Heat exchange during high-temperature reactions, such as high-temperature chlorination, nitration or oxidation reactions.
3.3.Metallurgical industry
Recover and reuse high-temperature molten salt or other waste heat media to improve energy utilization efficiency.
3.4.Energy storage system
As a heat storage and heat release device, it achieves a balance between large-scale thermal energy storage and output.
4. Feature Analysis
4.1.Adapt to high temperature environment
Can withstand working conditions up to 700°C, suitable for extreme high temperature requirements.
4.2.Large heat exchange area
Sufficient heat exchange area is provided through multiple heat exchange tubes to improve heat transfer efficiency.
4.3.Strong corrosion resistance
Use special materials resistant to molten salt corrosion to extend equipment life.
4.4.Modular design
The size can be customized according to different application requirements to adapt to various industrial conditions.
4.5.Convenient maintenance
The flange design is easy to disassemble, and the salt accumulation inside the pipeline is cleaned and repaired regularly.
5. Advantages
5.1.Efficient heat energy utilization
The high specific heat capacity of molten salt and the efficient design of the heat exchanger combine to significantly improve the transfer and storage efficiency of heat energy.
5.2.Stable operation
Can adapt to continuous high-temperature operation and meet the requirements of industrial continuous production.
5.3.Energy saving and environmental protection
Reduce traditional fuel consumption, reduce carbon emissions, and meet the development trend of clean energy.
5.4.Strong economy
Long-life design and high-efficiency operation reduce operation and maintenance costs.
5.5.Process flexibility
Can be widely used in various industrial scenarios to achieve efficient heat exchange between molten salt and various media.
6. Dunhuang, China. 100MW photovoltaic project
