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GOLDENSAIL
01
2022
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05
How to choose the process flow channel and version of the gasketed plate heat exchanger
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Gasket plate heat exchanger is a new type of high-efficiency heat exchanger formed by stacking a series of metal sheets with a certain corrugated shape. Thin rectangular channels are formed between various plates, and heat exchange is carried out through the plates. The heat exchanger is mainly composed of frame and plate. Compared with the conventional shell and tube heat exchanger, its heat transfer coefficient is much higher under the same flow resistance and pump power consumption. It is a fast and efficient heat exchanger. heat exchange equipment. So how to choose the process flow channel and version of the gasketed plate heat exchanger?
1. Selection of process and runner. The process refers to a group of parallel flow channels in the same flow direction of a medium in the plate heat exchanger, while the flow channel refers to the medium flow channel composed of two adjacent plates in the plate heat exchanger. In general, several flow channels are connected in parallel or in series to form different combinations of cold and hot medium channels.
2. About the selection method of plate type. The plate type or corrugated type should be determined according to the actual needs of the heat exchange occasion. In the case of large flow and small allowable pressure drop, the plate type with low resistance should be selected, otherwise, the plate type with large resistance should be selected.
According to the fluid pressure and temperature, it is determined whether to choose a detachable type or a brazing type. When determining the plate type, it is not suitable to choose a plate with a small veneer area, so as to avoid too many plates, the flow velocity between the plates is too small, and the heat transfer coefficient is too low. , this problem should be paid more attention to for larger heat exchangers.
3. Check the pressure drop. In the design and selection of plate heat exchangers, there are generally certain requirements for pressure drop, so they should be checked. If the check pressure drop exceeds the allowable pressure drop, it is necessary to re-calculate the design and selection until the process requirements are met.
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