Study On Deep-cut Of Fuel-type Vacuum Distillation Unit

In this paper, the author took deep-cut of vacuum column as the main task and studied the key technology of the new process for deep-cut column on the basis of vacuum tower design of 500Mt/a atmospheric and vacuum distillation in Petro-China Company Limited Huabei Petrochemical Company, a reasonable conclusion was obtained. Liquid distribution experiment of one nozzle was conducted with water as medium in air. The spray nozzle distributor was designed with the instruction of the liquid distribution experiment dates of one nozzle. The results show that the calculated liquid distribution used design method was consistent with real liquid distribution of several nozzles, so the method can instruct the design of spray nozzle distributor. The author made the direct contact heat transfer experiment in different liquid and gas capacity with water and vapor as medium, direct contact heat transfer efficiency of orifice trough liquid distributor and spray nozzle distributor was studied. The results showed that the application of direct contact heat transfer with spray to fuel-type vacuum column was effective. It not only economized packing but also greatly reduced the pressure drop of the whole column. The author also tested the pressure of the three new type packing Chaopak250Y, Zupak125Y and Zugrid64Y in different F-factor and liquid capacity with water as medium in air. The pressure of the new type packing unit height was obtained. In the end, the whole column process simulation and design were studied based on the properties of Huabei atmospheric residue. Liquid and gas capacity and physics properties of every theoretical stages were obtained. The vacuum column was designed based on the dates which were calculated by simulation. The results show that the pull-out rate was improved.