Field Diesel Units
Field Diesel Units are effective in areas where there is a ready supply of crude oil but limited supply of diesel fuel, such as unpopulated areas, remote oil fields or drilling locations. A Field Diesel Unit can fulfill local fuel requirements for power generation and drilling operation. This unit extracts diesel component from crude oil and then blends rest of the product back to crude oil. The Field Diesel Unit is split into easily transportable skids; it is quick to install and self-sufficient. The unit can be started when needed and stopped when the tanks are full. The diesel produced by these units largely depends on the type of crude oil, the lighter varieties will provide greater diesel yield and higher cetane number.
The crude oil is pumped from storage tanks and preheated in Crude Interchanger before further heating. The temperature of crude oil at Heater outlet is carefully controlled for optimal operation. The heated crude oil is flashed into vapour and liquid fractions in the flash zone of Distillation Column. At a certain temperature, the diesel fraction is drawn into Diesel Stripper for flash point control and sent to storage after cooling.
The light fraction (condensate) is condensed in Overhead Condenser and collected into Reflux Drum. Part of the condensate is fed as reflux and balance is blended with the residue from the Column bottom and mixed with the crude oil. The uncondensed gases are burned in the Heater or vented to Flare system.