Plant application of a T-junction as a partial phase separator

It is considered good practice for a distillation column with a two-phase (vapour/liquid) feed to separate the phases and feed them into the column at different points. The phase separation is normally effected in a cylindrical vessel. The cost of design, construction and installation of such a vessel is not trivial. This paper presents an alternative, more economical approach to tackle the task. It utilizes the maldistribution of the phases that occur when a gas/liquid stream is divided at a T-junction. The design approach adopted to specify the geometrical parameters of the junction and surrounding pipework is described. Post installation tests, which were carried on the equipment to verify its correct operation, are also reported. The plant management are delighted with the operation of the equipment.