AGITATOR - AN OVERVIEW
Agitators are equipment used to homogenize media inside a tank. They work by rotating immersed impellers at a controlled speed. The work exerted by the impeller induces the flow and shear of the media inside the tank, causing a single or multi-component media to homogenize. Agitators are used in industries to enable proper mixing of liquids, promote chemical reactions inside the equipment, keep homogeneous liquid bulk during storage, increase heat transfer during heating or cooling, disperse immiscible liquids, keep the product in a mixed state until used, blend miscible liquids, and dissolve some solids into liquid. Common types of agitators employed for industrial purposes are Paddle Agitators, Anchor type agitators, Propeller type agitators, Blade type agitators, Turbine type agitators, and Helical Agitators. Helical agitators are a type of mixing equipment consisting of ribs or blades arranged in the form of a helix. This design creates axial motion and vigorous fluid motion inside a vessel. It is often used to mix viscous materials. The helical agitator is commonly used for low Reynolds number industrial mixing. The helical design of these agitators generates high shear rates and ensures thorough mixing of materials with different densities and viscosities. Helical agitators are used in polymer industries and other industries that require the use of quite viscous materials.
SCOPE OF THE PROJECT
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CFD MESH
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EULERIAN MULTIPHASE FLOW MODEL
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Pressure on the Helicoil
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Volume Fraction
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Mechanical and Structural design of Disk baffle for Oligomerisation reactor
We executed this project for a SABIC Petrochemical plant located in Al Jubail, Saudi Arabia. The proposed disk baffle is expected to serve the function of separating the condensate in the Oligomerisation reactor. We developed the conceptual model of the disk baffle using our expertise in core mechanical design and optimized the design using Finite Element Analysis (FEA). We provided detailed fabrication drawings to the customer and supported them during Fabrication process. Read More
Pollution dispersion studies for SABIC chemical plant stack using Computational Fluid Dynamics (CFD)
We executed this project for a SABIC chemical plant in Al Jubail, Saudi Arabia. The objective of the project is to dilute the concentration of pollutants in the high-rise stack by injecting steam generated from the waste heater boiler. We carried out CFD analysis and analyzed the reduction in the concentration of pollutants. We designed a sparger which enabled us to increase the effective height of the stack. Read More
Cement grinding plant Roller shaft re-design and FEM analysis
Frequent failure of the shaft used in cement grinding units at our customers plants across India warranted an independent review of the shaft design. Niharika Computational Engineering Solutions Pvt. Ltd. (NCES) was chosen for this Independent review task using the finite element method. NCES was provided with information on the working principles of the roll press system and also information on the material used for the shaft that is in question, along with detailed drawings. To better understand the design of the shaft for various loads that it would see during normal operation, a comprehensive study was undertaken by the NCES team. This study involved using Finite Element Analysis (FEA) and performing static analysis for load distribution, modal analysis for estimating natural frequencies, rotor dynamics for checking resonance due to vibration, and dynamic analysis to estimate endurance limit under complex loading and crack initiation and propagation. NCES team has modified the shaft design and recommended a new material that addresses the frequent failure of the shaft. Read More
Structural analysis of crude oil storage tank
The scope of the work is to validate the structural design of a 32 Kilo Litre crude oil storage tank employed in the Adani Petrochemical plant. Our customer has approached us to validate the tank and cone roof design using Finite Element Analysis (FEA). We conducted FEM analysis, worked collaboratively with our customer, and enabled them to address all the minor uncertainties. In the end, we concluded that the design met all the structural requirements. Read More
