Fixed Tube Heat Exchanger
Introduction
Tipo Fixed Tube Sheet heat exchanger is the most common type heat exchanger in all Industries. It is used in higher-pressure and Higher Temperature applications. Fixed tube Sheet heat exchangers are the one that are very much used in process chemical industries and refinery services, as there is absolutely no chance for intermixing fluids. This type heat exchanger is employed where even slightest intermixing fluids cannot be tolerated. It has straight tubes that are secured at both ends to tube sheets welded to the shell. The construction may have removable channel covers, bonnet-type channel covers tube sheets. The principal advantage the Fixed Tube Sheet Heat Exchanger construction is its low cost because its simple construction. In fact it is the least expensive construction type, as long as no expansion joints required.
Specifications :
- It is that shell pass cannot be cleaned with the mechanical method and the maintenance is difficult.
- It is applicable to all services where the temperature difference between the shell and tube is small.
- In the event a large differential temperature between the tubes and the shell, the tube sheets will be unable to absorb the differential stress, making it necessary an expansion joint.
Applications :
- The Tube sheets at both ends the fixed tube-sheet heat exchanger is connected and fixed with the shell by means the welding method.
- Fixed tube-sheet type heat exchanger features simple and compact structure, and low manufacturing cost for the same diameter shell, the biggest number caladria is available in tubular heat exchangers is widely applied in engineering.
- The temperature difference is slightly great but the pressure shell pass is not high with media in the shell pass not easy to scale
- The shell pass can be cleaned with chemical method after the scaling is formed.
Advantages:
- Advantages are that the tubes can be cleaned mechanically after removal the channel cover or bonnet, leakage the shell side is minimized since there are no joints.
- A disadvantage this design is that since the bundle is to the shell and cannot be removed; the outsides the tubes cannot be cleaned mechanically.
- Its application is limited to clean services on the shell side. However, if a satisfactory chemical cleaning program can be employed.
- Construction may be selected for fouling services on the shell side.
- This takes away the advantage low cost to a significant extent.
Features :
- It is the most common type of heat exchanger in all Industries
- Materials of Construction : Stainless Steel, Copper Alloys. Other material options as available.
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