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Agitators By Industry Promote Good Heat Transfer, Mass Transfer And Chemical Reactions
Oct 26, 2017

Fluid flow in the pipeline, there are laminar flow, transition flow, turbulent three states, stirring equipment also exist in the three flow state, and determine one of the main parameters of these states is the viscosity of the fluid (refers to the fluid Flow resistance.

Therefore, we will use the agitator in the mixing device.

Principle: When the Agitators By Industry rotates, the mechanical energy is transferred to the fluid, forming a highly turbulent full mixing zone near the Agitators By Industry, and producing a high-speed jet to propel the liquid to circulate within the agitating vessel.

The relationship between the flow pattern and the stirring effect and the stirring power is very close. The improvement of the Agitators By Industry and the development of the new agitator often proceed from the flow pattern.

Mixer Top-mounted center-mounted three basic flow patterns for vertical cylinders: radial flow, axial flow and tangential flow.

The flow direction of the fluid is perpendicular to the stirring shaft and flows in the radial direction. The wall of the container is divided into two layers of fluid, which flows upwards and downwards, and then returns to the leaf end without passing through the blades to form the upper and lower circulation.

The flow direction of the fluid is parallel to the stirring shaft. The fluid is pushed by the blade to move the fluid downward, and then the bottom of the container is turned upwards to form the upper and lower circulating flow.

Propeller-type agitator is a widely used axial-flow type high-performance Agitators By Industry, its discharge performance, low shear force. The convective circulation at low speed and the turbulent state at high speed. The larger blade angle and blade twist can make the Agitators By Industry reach the higher flow field in the transition flow or even turbulence, and its draining ability is higher than that of the traditional propulsion The Agitators By Industry is increased by 30%. Suitable for low viscosity mixing, dissolving, solid suspension, heat transfer, reaction mass transfer, extraction, crystallization operation.

Turbine Agitators By Industry (also known as turbine impeller), is a wider application of a Agitators By Industry, can effectively complete almost all of the mixing operation, and can handle a wide range of viscous fluid. By the installation of 2 to 4 flat or curved blades on the horizontal disc.

Turbine agitator speed, 300 ~ 600r / min. The main advantage of the turbo agitator is that when the energy consumption is not large, the stirring efficiency is high and the stirring produces a strong radial flow. There is a large shearing force that allows the fluid micelles to be dispersed very fine, suitable for mixing with low viscosity to medium viscosity fluids, liquid-liquid dispersion, liquid-solid suspension, and promoting good heat transfer, mass transfer and chemistry reaction.

The blade Agitators By Industry is the simplest, the blade is made of flat steel, welded or bolted to the hub, the number of leaves is 2, 3 or 4, the blade can be divided into two types: straight and leaf According to the different shape of the blade can be divided into paddle-type Agitators By Industry and oblique paddle mixer. The paddle Agitators By Industry produces radial force, and the oblique paddle Agitators By Industry produces axial force. The paddle Agitators By Industry is suitable for low viscosity liquids, suspensions and dissolved solutions.

The Agitators By Industry is a device that forces convection and uniform mixing of liquids and gaseous media. It is a device that mixes the fluid with a blade to mix the different substances [1-4]. Mixers are used extensively and have applications in all areas [5]. Mixing is the basic part of the industrial process, improve the mixing efficiency is significant, efficient mixing fluid is the ultimate goal of the agitator. Computational fluid dynamics (CFD) has the functions of preliminary performance prediction, internal flow prediction, numerical experiment and flow diagnosis. Fluent Software is one of the world's leading commercial CFD software packages and is a software for simulating and analyzing fluid flow in complex geometries. Numerical simulation is a quickest and most cost-effective way to design ideas and designs that seek to improve the performance of the impeller [7-8]. In this paper, the CFD technique is used to simulate the flow field distribution in the agitator with different blade diameter, speed and number of blades. Fluent software can directly view the internal flow condition of the mixer. Optimize the design work to provide a reference.

The increase in the blade diameter, the blade speed and the number of blades is conducive to the mixing of the mixing evenly, but the increase in the diameter of the blades and the number of blades not only complicates the processing of the agitator blade, but also requires a high technical requirement , The cost will increase; the blade speed is also subject to the structure of the mixer and the mixing shaft size, can not blindly increase. Only consider the various factors in order to determine the most economical and most suitable blade diameter, speed and number of blades.