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According to industry custom, does not include the plate shape as the surface of the last two categories, only the plate shape for rectangular or round corrugated plate of the first two categories, further divided into:

1. According to the connection between the plates is divided into removable or sealed straps and welding plate heat exchangers.

2. According to the runner characteristics of cold and hot fluids or plate structure can be divided into symmetrical plate heat exchangers and asymmetric plate heat exchangers.

3. According to the gap size of the runner can be divided into: conventional gap plate heat exchanger and wide gap plate heat exchanger.

4 according to the complete set of products can be divided into: plate heat exchanger single machine and plate heat exchanger unit.

 

 

Heat transfer plate is the main heat exchanger heat exchanger components, general ripples into human glyphs, according to the fluid medium, heat transfer plate material is not the same, mostly made of stainless steel and titanium.

 

 

The gaskets of the plate heat exchanger are mainly sealed between the heat exchangers. Materials are: butyl rubber, triethyl propylene rubber, fluoro-rubber, etc. , according to different media using different rubber.

 

 

The heat transfer coefficient is 3 to 10 times larger than the tube shell heat exchanger, the compact structure, light, the heat transfer area per unit volume can reach 2500 to 4370m2/m3; Can be used for gas-gas, gas-liquid and liquid-liquid heat exchange, can also be used for condensation and evaporation, suitable for many different fluids in the same equipment operation, the selection of suitable materials can be used for heat exchange of various temperature ranges from 0 to 1000K, aluminum materials are particularly suitable for low or ultra-low temperature scase, complex structure, high cost, low runner, easy to clogging , not easy to clean, difficult to access, etc.

 

The strengthening of heat transfer process of heat exchanger 1. Increase heat transfer area method: increase the heat transfer area within the unit volume, use small tube diameter, plate heat exchange surface, change the shape of the heat transfer surface, etc.; High efficiency and compact results. 2. Improve the heat transfer force of the tm method: the average temperature difference of the size of the tm mainly depends on the temperature conditions of the two fluids, often limited by the process conditions. However, the temperature of the heating agent or coolant can vary greatly depending on the choice, such as the appropriate increase in the heating steam pressure, reduce the cooling water inlet temperature, determine the appropriate export temperature can be increased. When the two fluids do not change phase, the operation of the reverse or near countercurrent from the structure as far as possible can be improved. 3. Increase heat transfer coefficient K method: reduce dirt heat resistance: by increasing the flow rate to flush the wall of the pipe to prevent dirt deposits, or the use of scale inhibitors and other chemical and mechanical methods to inhibit the generation speed of dirt, and pay attention to timely removal and other measures. Improve the coefficient of circulation heat: especially the heat coefficient of the spread on the small side of h, the main way is to increase the degree of turbulence and reduce the thickness of the layer flow bottom. Specific measures are: (1) increase the flow rate, increase the number of Renault. Such as increasing the number of tube strains in the column tube heat exchanger and adding a bezel in the tube; Such as flow ingress in the shape tube or set up additives in the tube, the use of corrugated or rough surfaces, so that the flow direction and size of continuous change, etc. , can improve the heat transfer intensity; The jet heat transfer surface is caused by the jet method. Development at home and abroad overview: hemp flat tube heat exchanger: due to the unique tube structure of the tube and shell course to promote turbulence. The heat transfer coefficient of the heat exchanger is called an increase of 40% for the existing heat exchanger, while the pressure drop is almost equal. Features: improved heat transfer, reduced dirt, real reverse flow, no vibration, space saving, no folding elements, reduced costs.