Falling Film Steam Plate Heat Exchanger SS304/SS316/SS316L
Plate heat exchanger Classification
In general, we mainly distinguish plate heat exchangers according to their structure, that is, according to their appearance, which can be divided into four categories: ① Detachable plate heat exchangers (also called plate heat exchangers with sealing gaskets), ②Welded plate heat exchanger, ③Spiral plate heat exchanger, ④Plate coil heat exchanger (also called honeycomb heat exchanger).
Among them, welded plate heat exchangers are divided into: semi-welded plate heat exchangers, fully welded plate heat exchangers, plate-shell heat exchangers, and brazed plate heat exchangers.
Structural principle
The detachable plate heat exchanger is made of many punched corrugated thin plates at a certain interval, sealed by gaskets around them, and overlapped and compressed with frames and compression screws. The four corner holes of the plates and gaskets form fluid separation. At the same time, the cold and hot fluids are reasonably separated, so that they flow in the flow channels on both sides of each plate and exchange heat through the plates.
The optimal design calculation of the plate heat exchanger is to reasonably determine its model, process and heat transfer area under the condition of known temperature difference ratio NTUE, so that NTUp is equal to NTUE.
Material and operating conditions of gasket:
| Material | Application | working temperature |
| NBR | Water, sea water, mineral oil, salt water | -15—130℃ |
| HNBR | High temperature mineral oil, high temperature water | 15—140℃ |
| EPDM/HEPDM | Water,Hot water, steam, acid, alkali,caustic | -25—150℃ |
| Viton／Fluorine Rubber | Strong acid, strong alkali, mineral oil, grease and fuel oil, etc | 5—200℃ |
| NEOPRENE | Acid, alkali, mineral oil, low molecular weight aliphatic hydrocarbon | 35—130℃ |
| Silicon Rubber | High temperature and some corrosive environments | 65—200℃ |
Application:
| Materiel | Application |
| SUS304 SUS316L | Clean water, river water, food oil, mineral oil |
| Ti | Sea water, salt water, salt |
| Hadtelloy Alloy | Concentrated sulfuric acid, hydrochloric acid, phosphoric acid |
| Nickel | High temperature and high concentration caustic soda |
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