With neat sketch explain the construction and working of heat exchanger used for handling corrosive liquid.

With neat sketch explain the construction and working of heat exchanger used for handling corrosive liquid.
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Answer :

Graphite block heat exchanger: 

 Graphite heat exchangers are well suited for handling corrosive fluids. Graphite is inert towards most corrosive fluids and has very high thermal conductivity. Graphite being soft,these exchangers are made in cubic or cylindrical blocks.In cubic exchangers,parallel holes are drilled in a solid cube such that parallel holes of a particular row are at right angles to the holes of the row above & below.Headers bolted to the opposite sides of the vertical faces of the cube provide the flow of process fluid through the block.The headers located on the remaining vertical faces direct the service fluid through the exchanger in a cross flow.

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