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How to select a plate heat exchanger? Introduction to the Manufacturing Process of Plate Heat Exchan
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Choosing the correct plate heat exchanger is of great significance for improving production efficiency, reducing energy consumption, and saving costs. When selecting a plate heat exchanger, it is generally necessary to consider the following aspects:
1. Process parameters
When selecting a plate heat exchanger, the first step is to understand the physical and chemical properties of the medium to be treated, such as flow rate, temperature, pressure, viscosity, etc. Different physical and chemical properties can affect the heat transfer efficiency, heat transfer coefficient, resistance and other parameters of plate heat exchangers, so selection needs to be based on the characteristics of the medium.
2. Construction form
The construction forms of plate heat exchangers mainly include single panel heat exchangers and double-sided plate heat exchangers. Double sided plate heat exchangers can handle larger flow rates and are more suitable for high flow process applications; Single panel heat exchangers can better handle medium with low flow rates.
3. Plate material
The plate material of a plate heat exchanger has a significant impact on the heat transfer and heat transfer efficiency of the medium. Generally speaking, the heat transfer performance of plates made of different materials varies greatly for different media. For example, for high temperature, high pressure, and highly corrosive media, materials such as titanium, nickel, and Hastelloy should generally be selected as plates.
4. Heat exchange area
Heat exchange area is one of the important parameters of plate heat exchangers. Large area heat exchangers can better meet the cold and hot exchange needs of high flow media. When selecting, practical application needs and heat exchange requirements between different media should be considered.
5. Equipment selection coefficient
When selecting a heat exchanger, it is usually necessary to consider the selection coefficient to ensure the performance, safety, and other requirements of the heat exchanger. The selection coefficient mainly involves fluid resistance, thermal resistance, pressure drop, and other aspects, with values typically ranging from 1 to 1.2.
In summary, the selection of plate heat exchangers requires comprehensive consideration based on specific process requirements, medium characteristics, heat exchange area, equipment selection coefficient, etc. Generally, the most suitable model needs to be obtained by combining theoretical calculations and practical experiments.
Plate heat exchanger is a type of heat exchange equipment that utilizes the fluid inside the plate cavity to transfer heat through the plates, achieving the purpose of heat exchange. The production process of this equipment mainly includes the following steps:
Preparation of plates
The main components of plate heat exchangers are plates, which generally require high-quality plates such as stainless steel, titanium alloy, Hastelloy, etc. After cutting the plate according to certain size requirements, it undergoes processing processes such as folding, stamping, and welding to form wavy plates used to form the heat transfer surface of the heat exchanger.
Welding plate
After the processing of the plate, it is necessary to seal and weld the edges of the plate. Generally, LASER or TIG welding processes are used to ensure the integrity of the plate edges while minimizing the deformation and thermal stress generated by welding.
Assembling plate heat exchangers
After the production of the plates, they are assembled according to the designed layout and placed vertically and horizontally in a cross manner to form a balanced flow channel. After the installation of the plate heat exchanger, the interior is filled with water or medium, and processing processes such as sealing and cold bending are carried out as required.
Conduct experimental testing
After the production of the plate heat exchanger is completed, strict testing is required to ensure that its heat exchange performance and sealing performance meet the design requirements. The detection method generally adopts hydraulic test or helium leak detection, and the detection results can only be put into use after meeting relevant requirements.
Maintenance
After the installation, regular maintenance and upkeep should be carried out, and outdated, worn, rusted or damaged components should be replaced and repaired in a timely manner. In addition, it is necessary to regularly clean the interior of the plates to maintain their good heat exchange performance.
In summary, the manufacturing process of plate heat exchangers requires the careful implementation of multiple processes, especially strict inspection processes such as water pressure testing, which is an important guarantee for ensuring the reliability of plate heat exchangers.
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