Gasketed plate heat exchanger

PLATE HEAT EXCHANGERS 12.12.1. Gasketed plate heat exchangers 

Plates are available in a wide range of metals and alloys including stainless steel, aluminium and titanium. A variety of gasket materials is also used see Table 12.8. 

The advantages and disadvantages of plate heat exchangers, compared with conventional shell and tube exchangers are listed below  

Plates are attractive when material costs are high. 

Acrylonitrile-butane rubber 140 Aqueous system, fats, aliphatic hydrocarbons 

Ethylene-propylene rubber 150 Wide range of chemicals 

Compressed asbestos 250 General resistance to organic chemicals 

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The basic layout and flow arrangement for a gasketed plate heat exchanger is shown in Figure 12.60. Comer ports in the plates direct the flow from plate to plate. The plates are embossed with a pattern of ridges, which increase the rigidity of the plate and improve the heat transfer performance. 

Investigate the use of a gasketed plate heat exchanger for the duty set out in Example 12.1 cooling methanol using brackish water as the coolant. Titanium plates are to be specified, to resist corrosion by the saline water. 

There is a requirement to cool 200,000 kg/h of a dilute solution of potassium carbonate from 70 to 30°C. Cooling water will be used for cooling, with inlet and outlet temperatures of 20 and 60°C. A gasketed-plate heat exchanger is available with the following specification ... 

A gasketed plate heat exchanger is usually significantly cheaper than a shell-and-tube heat exchanger for the same duty. This is especially the case if the shell-and-tube heat exchanger must be fabricated in more expensive materials such as stainless steel. 

The costs for this form of exchanger are higher than those for gasketed plate heat exchangers. An important limitation is that they can only be cleaned chemically and not mechanically. 

Gasketed plate heat exchangers are commonly used in food processing. What advantages does the design offer in such applications ... 

A gasketed-plate heat exchanger is illustrated in Fig. 5, and representative plates are shown in Fig. 6. In this type of exchanger, the heat transfer surface is the thin corrugated... 

FIGURE 5 Exploded view of a gasketed-plate heat exchanger. 

FIGURE 6 Two types of gasketed plates for the gasketed-plate heat exchanger (a) parallel-corrugated plate (b) cross-corrugated plate ( herringbone pattern or chevron ). 

Gasketed-Plate Heat Exchanger and Related Partially Welded... 

FIGURE 6.35 Exploded diagram of a gasketed-plate heat exchanger. (Reproduced with permission of Alfa Laval Inc.)... 

The plate-and-frame or gasketed plate heat exchanger (PHE) consists of a number of thin rectangular corrugated or embossed metal plates sealed around the edges by gaskets and held... 

Extensive heat exchange between outgoing streams and the incoming feed will be used. Gasketed plate heat exchangers will be used increasingly for this application. 

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