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Tube bundle condenser

Tube bundle condenser is now the most widely used heat exchangers. It has simple and solid construction, could be easily manufactured and has very wide range working condition adaptation. But this type of Condenser is a bit lower in heat exchange rate, less compact and will cost a little more metal raw material compared with Plate Type Heat Exchanger.
Bundle Condenser usually includes three types: Fixed tube plate type, U-tube type and Floating heat type. Bundle Condenser consist components like external shell, tube plate (or say tube bundle board) and head cover (or say header), etc.
We install parallel tube bundle in round-shaped shell and fix both ends on tube plates. Tube bundle is usually fixed by welding or tube expansion. The top cover of inlet or outlet with screws will connect with flanges on both ends of shell, forming a liquid distribution chamber.
During heat exchange of tube bundle condenser, cooling water enters from top cover tube connection, liquid flows inside tubes. This circuit is called tube circuit. Hazardous gas flows between the gap of shell and tube bundle. And this circuit is called shell side. The external surface area is heat transfer area. In condensing process, to whichever saturated steam or non-condensed gas, preferably we put this condensate process in horizontal shell as it’s more reasonable heat transfer, pressure drop and easy for cleaning. Details as below:
         1. Heat transfer rate of condensing film in horizontal condenser is higher than internal or external film heat exchanger rate of vertical condenser by several times. And in the same time condensate won’t easily get jammed in corner.
         2. It’s simpler for cleaning water fouling when cooling water goes inside tube circuit while ensuring relatively high water flow rate and slows down water fouling accumulation speed meanwhile increasing the heat transfer rate.

         3. Horizontal tube bundle condenser can better collect condensed liquid at the bottom of shell, and better cools down condensate liquid at shell bottom too. In condensing system, it’s important to further cool down condensate liquid. If the temp of condensing system is high, once it get contact with air, organic gas evaporates in large amount, so generally speaking the inlet temp of condensate liquid is below 60℃ or lower. Of course we can add an additional cooler but it will increase cost in the same time. 


 



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