16409-1996 Plate heat exchanger
The plate heat exchanger is a type of heat exchange equipment, which is widely used in chemical, food, brewing, refrigeration, steel and other industries. Its operating temperature and pressure range, heat transfer performance and versatility of application technology have been constantly improved through technological progress, and the technical standard of plate heat exchanger has been formulated. The design, installation, use, inspection and maintenance of plate heat exchanger should be carried out in strict accordance with the provisions of the standard. This standard is formulated for the purpose of safety, rational use and energy conservation of plate heat exchanger in the industry.
Scope of application
This standard specifies the technical requirements, design, manufacture, test and acceptance of T/G type and F type plate heat exchangers. This standard applies to 0.3-2.0MPa design pressure of plate heat exchangers, working temperature -100-900℃, material carbon steel and titanium plate allowed by this standard. The plate heat exchangers designed and manufactured in accordance with this standard are suitable for exchanging heat of gas, liquid and steam.
Main components
The plate heat exchanger consists of multiple plates, frames and corner pieces. Each plate has a herringbone corrugated shape and is pressed at intervals to increase the effective heat exchange area. The entrance and exit of the medium are respectively connected to the frame on both sides. When the medium flows from the entrance to the exit, it alternately changes direction, so that each two adjacent plates convert heat, and finally achieves the purpose of heat exchange. The plate and corner pieces are made of carbon steel, stainless steel or titanium plate, etc. The frame and netting are mostly carbon steel, and some are stainless steel.
Structure features
1. High heat exchange efficiency: Due to the scientific design of the plate heat exchanger, the distance between the lips of the two plates is very small, so that the heat conduction process has a very high heat exchange efficiency.
2. Easy to clean and maintain: Plate heat exchanger has a simple structure, which is larger than the heat transfer area and takes up less space. At the same time, it can completely dismantle the inner layer of the plate and easily clean the heat transfer surface that is not clean due to the scale attached.
3. Low fouling resistance: The distance between the plates is very small. When the medium is contaminated or blocked with external particles, the fouling resistance is much smaller than the tube heat exchanger, so it is easy to remove the scale and is not easy to cause a block.
4. Compact structure: Due to the small size of the plate, compared with the traditional shell and tube heat exchanger, it has smaller appearance size and takes up less space, and the construction and maintenance is very convenient.
Use tips
1. Pre-inspection of the plate heat exchanger before operation, check whether the equipment accessories are complete, whether there are cracks, leakage and other phenomena that affect the normal operation of the equipment.
2. Pay attention to the cleanliness of pipeline system, there should not be sundries in the tube.
3. Pay attention to the maintenance of the parts of the plate heat exchanger and the cleanliness of the heat transfer surface of the plate.
4. Pay attention to the flow direction of medium, and the flow accuracy of medium should meet the requirements.
5. Do not exceed the maximum safe pressure and temperature of the equipment during operation.
Conclusion
The plate heat exchanger has many advantages compared with the traditional tube heat exchanger, such as high heat exchange efficiency, easy cleaning and maintenance, low fouling resistance and compact structure. But in actual use, we should also pay attention to the pre-inspection of the equipment, the cleanliness of the pipeline system, the maintenance of the equipment parts, the accuracy of the medium flow and the maximum safe pressure and temperature of the equipment.
