Low pressure drop mixer

A Static Mixer, like the Flanged static mixer, is an efficient mixing device without moving parts. In addition to being widely used in the petroleum refining and chemical industries, it is also widely used in sectors such as medicine, food, mining, plastic extrusion, and environmental protection. Compared with traditional mixing equipment such as mixers, colloid mills, homogenizers, and Venturi tubes, it has the advantages of a simple process, compact structure, low energy consumption, low investment, high operational flexibility, no need for maintenance, and good mixing performance. Any process involving the mixing, emulsification, neutralization, absorption, extraction, reaction, and enhanced heat transfer of liquid-liquid, liquid-gas, liquid-solid, and gas can replace traditional related equipment.

 

The Low pressure drop mixer, or LPD Static Mixers, are particularly designed to minimize pressure loss while maintaining high mixing efficiency. Sanitary LPD Static Mixers are a variant that is specifically engineered for applications in the food and pharmaceutical industries where hygiene and low pressure drop are crucial.

 

Operational Principle:

The mixing process of a static mixer is carried out by a series of mixing units of different specifications installed in a hollow pipeline. Due to the action of the mixing unit, the fluid sometimes rotates left and sometimes turns right, constantly changing the flow direction. This not only pushes the central fluid towards the periphery but also pushes the peripheral fluid towards the center, resulting in a good radial mixing effect. At the same time, the rotational action of the fluid itself also occurs at the interface of adjacent components, and this perfect radial circulation mixing effect achieves the goal of uniform mixing of materials.

 

Application Scope:

Static mixers, including the Flanged static mixer and LPD Static Mixers, can be applied to the mixing, emulsification, neutralization, absorption, extraction, reaction, and enhanced heat transfer processes of liquid-liquid, liquid-gas, liquid-solid, and gas-gas. They can be applied in different flow patterns (laminar, transitional, turbulent) within a high viscosity range, for intermittent and continuous operations. Below, we will briefly introduce the scope of different application scenarios.

 

(1) Liquid-liquid mixture

From the flow layer to turbulence, fluids with viscosity within the range of 10 Mpa·s can achieve good mixing. The minimum diameter of dispersed droplets can reach 1-2 μm, and the size distribution is uniform.

 

(2) Liquid-gas mixture

The static mixer can continuously update and fully contact the phase interface of the liquid-gas two-phase components, and can replace the bubbling tower and sieve plate tower under certain conditions.

 

(3) Liquid-solid mixture

When a small amount of solid particles or powder (solid accounts for about 5% of the liquid area) is mixed with the liquid under turbulent conditions, a static mixer can be used to force the solid particles or powder to fully disperse, which can achieve the requirements of extracting or decolorizing the liquid.

 

(4) Gas-gas mixture

Can be used for mixing cold and hot gases, as well as mixing different gas components.

 

(5) Enhanced heat transfer

Due to the static mixer, the contact area of the fluid is increased, which increases the heating coefficient. Generally speaking, for gas cooling or heating, if a static mixer is used, the heating coefficient of the gas can be increased by 8 times; For the heating of viscous liquids, the heating coefficient can be increased by 5 times; For gas condensation with a large amount of non-condensable gas, the heat transfer coefficient can be increased by 8.5 times; The heat transfer of polymer melt can reduce the temperature and viscosity gradient on the pipe section.