Reconstruction of shell-and-tube heat-exchangers

JSC “GANDRAS ENERGOEFEKTAS” provide modernization of shell-and-tube heat exchangers which are in operation.

We offer following variants of modernization (by the example of vertical exchanger):

Method Scope of modernization Rise of thermal effectiveness
I Tube bundle remains. The outer case is entered, the tube system transforms into one-pass on steam. Steam moving through the tube surface of II water rate to surface of I water rate. Partial catchment and removal of condensate and air-steam mixture from steam condensation zone. 12-15 %
II Full disassembling of tube bundle, loose tubes, splitters and anchor tie replacement, maintenance of tube plates (possible). Fuller realization of work in method I is occurred in part of catchment and removal of condensate steam and in removal of air-steam mixture from condensation zones. Case insertion in tube bundle, new anchor ties installation. 20-25 %
III The structure retention of initial tube system, full replacement of plain tubes to tubes with dimples.
Incomplete realization of catchment and removal of condensate steam and air-steam mixture from zones of steam condensation. The installation of case on tube bundle is not possible.		 30-35 %
IV The retention of tube plates, full replacement of loose plain tubes to tubes with dimples. Replacement of splitters and anchor ties. Insertion of case in tube system. The fullest realization of catchment and removal systems of steam condensate and removal of air-steam mixture from condensation zones. 40-50 %

 

If modernisation economically inexpedient or the heat-exchanger case condition doesn’t allow completing, we are ready to offer new heat-exchangers according to Customer parameters – plate and shell-and-tube (also with built-in condensate cooler).