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Sedimentation Prevention and Quality Homogenization Project for a 400-Ton Edible Oil Tank

Project Overview

Large-scale edible oil manufacturer F was operating an ultra-large 400-ton storage tank. Over time, silicon, a key additive that affects the crispiness of fried products, began to settle at the bottom of the tank.
As a result, the early bottled products contained too much silicon, while later products had insufficient silicon, causing serious quality inconsistency.
To maintain a uniform concentration throughout the entire 400-ton tank within the required tolerance range, Company F introduced SEDNA ENG’s customized mixing solution.

Challenges

1. Silicon Settling in a Large-Capacity Tank

Although silicon is essential for edible oil quality, it naturally settled at the bottom due to the massive 400-ton tank capacity and long storage time. This was not simply a mixing challenge, but a difficult task requiring the settled particles to be lifted and suspended.

2. Quality Deviation During Bottling

Since the tank outlet valve was located at the bottom, concentrated silicon was discharged in the early bottling stage, while later products contained oil with little or no silicon. This caused a critical quality issue that affected product taste and consistency.

3. Wide Tank Diameter and Dead Zones

Due to the extremely large tank diameter, conventional side-entry agitators could not effectively deliver flow to the center or opposite lower section of the tank. As a result, dead zones where sediment accumulated were inevitably formed.

SEDNA Solution

1. SHM with Extended Shaft (Extended Shaft Design)

Recognizing the lower specific gravity of silicon and edible oil, SEDNA ENG boldly extended the drive shaft of the SHM model to create more efficient fluid flow. This allowed the blade to be positioned deeper and closer to the center of the tank, enabling the vortex flow to reach the entire tank.

2. Zero-Deadzone Flow Dynamics

The extended blade generated a strong upward flow while sweeping along the tank bottom. This continuously lifted the settled silicon through re-suspension, completely eliminating dead zones at the bottom of the tank.

3. Smart Installation for Large Tanks

Considering the characteristics of the 400-ton tank, where top-mounted installation was difficult, SEDNA ENG applied a customized magnetic solution that maintained the side-mounted configuration while minimizing internal structural modifications.

PROBLEM

SOLUTION

01

Perfect Uniformity

Silicon concentration deviation across the entire 400-ton volume was brought within the required tolerance range, ensuring consistent quality regardless of the bottling stage.

02

Effective Sedimentation
Control

The extended shaft design solved the sedimentation issue and maintained a stable dispersion state, preventing silicon from settling even during long-term storage.

03

Optimized for
Mega-Scale

By accurately analyzing the specific gravity of edible oil and silicon, SEDNA ENG applied a customized long-shaft design to maximize the efficiency of large-scale equipment.

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