Floating Head Heat Exchanger is the most widely used of a heat transfer equipment currently, as a standard heat transfer equipment. One end tube plate of the heat exchanger can free shrinkage, so-called 'floating head', which is made up of a number of tube bundle, the tubes fixed to the tube plate,wich is join together with shell. In order to increase fluid flow rate in the pipe outer space, to improve its heat transfer, Multi-block Baffled boards were installed in cylinder. It adapt to big temperature difference between tube wall and shell wall, Bundle tubes space for regular cleaning; But its complex structure, the processing cost is high.