Crude oils are often blended to increase the sale price or process-ability of a lower grade crude oil by blending it with a higher grade, higher price crude. The objective is to produce blended crude oil to a target specification at the lowest cost using the minimum higher cost crude oil.
The crude oil feed-stocks used for blending often vary in quality and for this reason crude oil blenders normally use viscosity or density trim control systems. When the blender is started the required flow rate and component ratio is set by the control system based on the ratio in the recipe. A density or viscosity analyser, installed at a homogeneous point in the blender header, generates a control signal, which is used to continually optimise the blended product by adjusting the component ratio. This ensures that the blended product remains as specified at all times during the batch.
The field equipment for every crude oil blender is designed and selected to ensure minimal pressure drop and maximum reliability. Jiskoot blenders use a controller with unique self-learning control algorithms that instantly respond to changes in process conditions or feedstock quality. Components are continuously measured and adjusted during the batch to ensure optimum quality and minimum give-away.
Blended products are volume corrected to standard conditions using API 2540 / IP 200. Loading and blend documentation can be automatically produced in volume or mass units by the controller.
Jiskoot systems are designed to ensure consistent quality throughout the batch even during tank changes, feedstock starvation, loss of power or the unlikely failure of a system component. The final product is mixed in the blender header to ensure product consistency and the accuracy of any analyser fitted. This also provides an ideal location for an automatic sampler.
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