| A patent technology about rectifying tower tray was introduced. In a traditional tray, a mass transformation between liquid and vapor that go along with heat exchange between two phases when they get into touch could never get balanced.The invention replaced the traditional style with a separated heat exchange procedure between liquid and vapor. Each tray was composed of two plates without hole.Balanced fractional condensation and balanced distillation took place on each tray: the remnant liquid of condensation was sent to lower tray, the vapor of distillation was fractionally condensed; the liquid of condensation rises up.The innovation points were: high efficiency, small tray spacing and no tiny liquid entrainment. The advantage of the new tray is its balanced rectifying processing from the view of thermodynamic, and the disadvantage the much longer time of heat transportation from the view of dynamics. The lower rate can be made up by the much longer time of heat transportation from the view of dynamics.The lower rate can be made up by the much longer time of heat transportation. which is the result of comparing the contact time of gas vertically passing through liquid layer on the tray and two phase horizontally flow along the tray.It is verified for feasibility of a new patent rectifying tower with simple structure short tray spacing and high turn-down ratio.The principle of multi staged evaporator is utilized for it. There is not pore in working area of the tray of 0.1mm thickness. The path for vapor is near the one for liquid. Liquid beneath and vapor on same plate flowing horizontally and equidirectionally is distilled or partly condensed by heat exchange. Also direct mass transformation occurs between the liquid on and vapor above same plate flowing in opposite direction. |
