Specific types and structural performance of spiral plate heat exchangers

-


 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.

评论

发表评论

此博客中的热门博文

Everything you should know about U bend tube

-
图片
  Murphy can make  U bend tube  in our factory according to customer requirements. The elbow is heat treated according to the customer’s requirements, and then hydrostatic pressure test and dye penetration test are performed as needed. U-shaped elbows are widely used in  heat exchanger  systems. Heat exchanger equipment based on stainless steel U bend tube plays an important role in the nuclear industry and petrochemical machinery manufacturing. U bend tube heat exchangers are specially designed for high temperature applications, especially steam condensing or hot oil systems. When the differential expansion makes the fixed tube-sheet heat exchanger unsuitable, and in some cases the floating head type (HPF) cannot be selected, the U bend tube heat exchanger will be selected. The surface of the finished U-shaped elbow should be free from scale and scratches after bending. Dimensional tolerance U-bend pipes are in accordance with relevant regulations of TEMA R.C.B. and ASTM A566 and ASTM
阅读全文

CLASSIFICATION OF HEAT EXCHANGER ACCORDING TO THE HEAT TRANSFER MATERIAL, SURFACE SHAPE AND STRUCTURE

-
图片
1. Metal material heat exchanger Common materials are carbon steel, alloy steel, copper and copper alloy, aluminum and aluminum alloy, titanium and titanium alloy. Because the thermal conductivity of metal material is large, the heat transfer efficiency of this kind of heat exchanger is high. 2. Non-metallic material heat exchanger Commonly used materials are graphite, glass, plastic, ceramics, etc. Because of the small thermal conductivity of nonmetallic materials, the heat transfer efficiency of this type of heat exchanger is low. Often used in corrosive systems. hashtag www.murphyfinnedtubes.com 1. Tube heat exchanger A heat exchanger that conducts heat through a tube wall. It can be divided into shell heat exchanger, coil heat exchanger, tube heat exchanger, fin heat exchanger and so on. 2. Plate heat exchanger A heat exchanger that conducts heat through a plate surface. According to the structural form of heat transfer plate can be divided into plate type, spiral plate
阅读全文

Spiral plate heat exchanger equipment quality problems.

-
图片
Spiral plate heat exchanger equipment can be broken down, mostly because of quality problems. Compared with the heat transfer surface of other heat exchangers, the heat transfer surface of this heat exchanger is quite thin, that is, 0.5mm, and the allowable high corrosion degree is 0.05mm/ year. The material of common spiral plate heat exchanger equipment usually USES alloy material (304 or 316), 304 is the low cost of austenitic stainless steel, has the ability to resist corrosion to a certain range of organic matter, but the ability to resist hydrochloric acid and sulfuric acid is weak. Spiral plate heat exchanger equipment can be broken down, but also because of its own maintenance problems. Spiral plate heat exchanger equipment is an important component of heat exchange technology in process industrial equipment. The resilient gasket that seals between the various helical fins is a vulnerable part and also an easily aged part under natural conditions. Its service life has an impo
阅读全文