For consistent operation of downstream units, it is imperative that homogeneous mixture of crudes is achieved. Side entry mixers are used to blend and homogenize crudes within the tank. Mixers also serve to prevent settling of sludge in the tank. These devices could involve pressurized systems, too.
Some of these include the horsepower of the equipment. The equipment can cause damage to the materials being mixed when it is too powerful. On the other however, if the machine is not strong enough, it can cause an inconsistency in the mix. The velocity profile inside the tank is also affected by the amount of mixers installed.
This study examines the impact of mixer’s number on how long it takes to homogenize the tank. Unsteady state simulations were employed to estimate the time needed. Using commercial CFD software, the flow inside the tank was modelled. There were two different layouts each with a different number of mixers. Each layout was constructed using heavy crude oil.
The velocities within the storage tank were measured at four different cross-sections. The average velocities decreased with the height. The maximum velocity also increased with the increase in the number of mixers. The velocity of the resulting jet increases with increasing mixers. However, the effect mixers have on the speed and speed of the resulting jets isn’t as important as the effect they have on the velocity and velocity of liquids.
To analyze the velocity profiles within the tank, the velocity profiles of the four cross-sections along the vertical axis of the tank were examined. These velocity profiles were compared for an instance where the crude’s top layer was lighter than the bottom. Densities of both layers were also compared at different planes. The simulations were stopped when the density difference was less than one kilogram/m3.
Both layouts were estimated to take homogenization. With commercial CFD software, the effect of the number of mixers on the time required to achieve complete homogenisation was calculated.
The dimension of the blades used to mix also affects the flow effect. A smaller diameter blade will result in more pressure than one with a greater speed. A larger diameter blade with a lower speed will produce a better flow effect. This is why it is crucial to choose the right mixer configuration based on the anticipated flow effect of the mixture.
Another consideration is the swivel angle for mixers. Mixers in tanks can be set up to rotate at the angle that will give the desired results. Moreover, swivel angles can be adjusted based on the axis of rotation of the mixer. How to Assemble Even Mix to Tank, the ideal mixer will be sized so that it can complete the tank’s contents in less than 4 hours.
INDCO provides a variety of products that can meet a range of needs. There are many options to choose from including plate-mount models, as well as Tri-clamp models. Additionally, INDCO’s engineers for applications can design mixers that are customized to meet the customer’s specific specifications.
