In view of the present situation of having no related perfect calculation method for drain flash tanks

a method for evaluating the load capability of drain flash tanks by using two parameters

namely equivalent flow rate and volumetric load coefficient of the said flash tank

has been put forward

and a calculation formula being given. Analysis and calculation for problems

such as loss of stability

and thermal deformation etc.

have been carried out

and an approach to problems in design of the flash tank being performed. A retrofitting scheme has been worked out on the basis of these results. After retrofitting

the practice in operation of more than two years shows that the analysis method and the retrofitting scheme had been put forward all to be feasible.