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Detailed explanation of the concept and advantages of semi-welded plate heat exchanger
Release time:
2021-09-16
Like the removable plate heat exchanger, the semi-welded plate heat exchanger has the advantages of small floor area, high heat exchange coefficient and heat exchange efficiency, convenient maintenance and economic operation.
The semi-welded plate heat exchanger will weld two sheets together to form a sealing channel. The special medium flows in the welding channel and only contacts the two medium sealing rings at the inlet and outlet of the plate group. The medium on the other side is still sealed with rubber rings, which can be removed if necessary to make the plates easy to repair, ensure the stability of the welding plate, and be suitable for handling fluids or gases with high requirements.
Semi-welded plate heat exchangers are widely used in metallurgy, cooling industry, sulfuric acid heat exchangers, ammonia evaporators and other metallurgical refrigeration industries.
Advantages of semi-welded plate heat exchanger:
1. It can withstand high temperature of 200 ℃, low temperature of - 38 ℃ and design pressure of 3.0 MPa;
2. The mechanical structure is solid, and the sealing performance of laser welding is more stable than that of adhesive. It can deal with corrosive media and prevent water leakage.
3. It is applicable to the liquid that has corrosive effect on the rubber gasket. It is easy to disassemble and clean the gasket.
4. The liquid holdup is small and responds quickly to changes in operating conditions;
5. No spare parts are needed, and the operation cost is low. The surface of process fluid (such as electrolyte, sulfuric acid, alkali, etc.) is laser welded, and the rubber pad is not sealed, so strictly speaking, it is not necessary to purchase parts. In this way, the operating cost of the equipment will be greatly reduced.
6. Modular design, the whole equipment is composed of multiple modules, each with 2 modules to ensure the flexibility of the equipment. In other words, the heat transfer of the equipment can be easily changed by increasing or decreasing the number of modules.
7. High scaling performance. Generally, the plates of semi-welded plate heat exchangers with modular design need to be polished in order to facilitate welding and improve welding or power supply. However, the anti-scaling performance of semi-welded plate heat exchangers has also been greatly improved.
8. Industrial automation electronic computer displays information, stores and copies various main operating parameters; Including: total flow of cooling water system, temperature of cooling water system, working pressure of cooling water system, heating, outdoor temperature, standard room temperature, power supply temperature, condensate temperature, working pressure of power supply, etc.
9. Semi-welded plate heat exchanger adopts industrial automatic measurement or intelligent system temperature controller to form an intelligent control system for power supply temperature; That is, the power supply temperature can be set strictly according to the outdoor working temperature; Temperature and time conversion between standard rooms; High heating quality, environmental protection and energy saving.
Like the removable plate heat exchanger, the semi-welded plate heat exchanger has the advantages of small floor area, high heat exchange coefficient and heat exchange efficiency, convenient maintenance and economic operation. It is a new type of heat exchange device, which combines the advantages of removable plate heat exchanger and all-welded plate heat exchanger. It is used to deal with ammonia, corrosive chemicals and other demanding fluids or gases. It is a new type of heat exchange device designed to prevent the heat transfer requirements of mutual leakage of media.
