Transvac Tank Jet Mixers have been successfully adopted for in-tank mixing throughout the Oil and Gas, Pharmaceutical, Chemical, Food and Waste Water industries.
Tank Jet Mixers use 1-part motive fluid to entrain 3-parts suction fluid, meaning low motive flow requirements and pump duties are required to achieve quick mixing times.
By installing a simple recirculation line with a pump externally, the mixers can offer an in-tank mixing arrangement with no moving parts inside the tank. Once installed, the Jet Mixers are virtually maintenance free.
Each Jet Mixer is custom designed. Transvac will specify the required motive flow and pressure to achieve the required tank turnover and/or mixing time based on each individual client’s requirements. Otherwise, if there is an existing pump on site, the mixer can be designed to suit the available duty.
Depending on the tank accessibility, mixers can be designed for installation in-tank, on a manifold, through-the-wall or on a dip leg. Transvac supply the majority of mixers with an angle-creating spool piece, designed to direct the flow in the tank. The spool angle may be dependent on the tank geometry and mixing requirements. For larger tanks, multiple mixers on a manifold are often required to ensure the full contents are engaged by the mixers.
Where the mixing quality throughout the tank is critical to the process, such as achieving a certain pH level, homogeneity or temperature, Transvac engineers are able to offer detailed CFD analysis to optimise the arrangement of the mixers further.
In order to avoid bypassing of the fluid or dead-spots within the tanks, Transvac’s in-house CFD team can assess the quality of mixing based on various installation options, including manifold layouts, mixer inlet elevations and spool piece angles. This is particularly beneficial for larger tanks where dead-spots can be difficult to predict.
Transvac recently worked with two very different clients to offer CFD analysis alongside their tank jet mixer projects. One project was to determine the required spool angles for 8 mixers turning over wastewater containing some solids. The second project utilised CFD to determine the best design for multiple mixers across six diesel tanks, each containing two identical Tank Jet Mixers.