Specific types and structural performance of spiral plate heat exchangers

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 What is a spiral plate heat exchanger? In simple terms, it is one of the common types of heat exchangers. It is a type of heat exchanger that is made of two spiral passages made of metal plates and exchanges heat between hot and cold fluids. Its advantages are compact structure, small size, and high heat transfer efficiency. Its application is mainly in industries that require heat conversion, such as petroleum, chemical, pharmaceutical, machinery, electric power, and environmental protection. 1. Specific types of spiral plate heat exchangers. Spiral plate heat exchangers are generally divided into two types: detachable and non-detachable. Among them, the non-detachable structure is relatively simple, that is, both ends of the spiral channel are all welded, so that it is not removable. The detachable spiral plate heat exchanger is different in structure from the non-detachable type, mainly in that the two ends of the spiral channel are sealed structures instead of welded. As for the other parts, it is exactly the same. The sealing is generally done with a flat cover and gasket. In addition, in order to improve the pressure-bearing capacity of the spiral plates, spacers are used to support the plates.

2. The structural performance of the spiral plate heat exchanger (1) The two spiral channels are respectively rolled by two metal plates, so the heat transfer medium can flow in full countercurrent flow in it to greatly enhance the heat exchange effect . Even if the temperature difference of the medium is small, it will not affect the heat exchange effect. (2) The connection pipe on the heat exchanger shell generally adopts a tangential structure, because in this way, there can be less local resistance, and at the same time, the flow rate can be appropriately increased to enhance the heat transfer capacity of the heat exchanger. (3) If the use of one spiral plate heat exchanger cannot meet the requirements of use, then multiple units can be used at the same time. In the combination form, it can be a series or parallel combination, but it should be noted that the equipment It must be consistent with the channel spacing. In addition, it can also be a mixed combination, that is, one channel is connected in parallel and one channel is connected in series.

3. Process flow of spiral plate heat exchanger The process flow of spiral plate heat exchanger is also a very important aspect. Therefore, everyone should take it seriously and not sloppy. Specifically, it is: blanking, splicing-non-destructive testing-flanging, contact welding fixed-distance column-surface cleaning-total assembly-non-destructive testing-rolling-channel shaping, welding channel, assembly-metal processing- Assembly-pressure test-pickling passivation, paint-packaging.

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