By Nancy Walker


One of the mechanisms used in most factories to move liquid and granular materials for different processes is called screw conveyors. The other name used for this mechanism is auger conveyor. Archimedes is the name of the Greek scientist who invented this system many years ago. Nowadays, the machine is very popular and is used a lot in many commercial and industrial applications.

Although there are several different kinds of screw conveyors, the most commonly used is the horizontal screw conveyor. It is used in conveying bulk materials from one part of a process to another. These systems are constructed in a wide variety of sizes, lengths, configurations, and materials. Stainless steel screw conveyor systems are popular since of the materials used to make these systems is steel. The inlet of the conveyor system is usually control fed by another device such as a screw feeder, rotary airlock, gravimetric feeder, or belt conveyor.

The discharge side is the conventional point of installation of the drive unit. The reason that this end is recommended is because it is the one responsible for displacing bulk material to the drive end. Reduced tear and wear is achieved using this arrangement by ensuring that every part of the conveyor experiences the same tension produced by the commodity being moved.

Auger conveyors have their own disadvantages linked to them. To begin with, they are perfect for conveying semi-fluid and dry semi-fluid materials. Furthermore, when compared to other conveyors like belt conveyors, pneumatic, and aeromechanical, screw conveyors are more effective in terms of cost. The efficiency in bulk material distribution is allowed for by the availability of multiple inlet and discharge points. Finally, the system is enclosed totally from corrosive, hazardous, and dusty environments, which helps to keep it safe and durable.

Inclined screw conveyors are another type of thee screw conveyors. These systems usually operate at an angle from the horizontal line. The angle between the system and the horizontal line can vary from as low as a few degrees to 45 degrees. Beyond 45 degrees, the system is no longer considered as inclined, but as vertical. The construction of vertical conveyors is regulated by the KWS Engineering Guide for these systems.

When the angle of inclination is increased, efficiency of the system reduces while horsepower requirements increase. Gravity caused by materials falling back is responsible for the reduced level of efficiency. Additional factors that reduce efficiency include type of conveyor system used and characteristic of material being conveyed. To achieve more efficiency in the system, the angle of inclination should be kept to the lowest.

Shaftless screw conveyors are also another type of conveyors. They are used to discharge material from filter presses, mixers, or centrifuges. They are used for conveying materials that are difficult to convey using other conveyor models. They are also very effective in conveying bulk materials with high amounts of moisture content. These systems do not clog if they are properly designed.

Some of the industries that use shaftless conveyors include chemical, minerals, and food processing. Wastewater treatment industries also find a lot of use for these conveyors. There are several design standards for this system that producers follow to produce good systems. The standards may vary from one country to another.




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