Pneumatic conveying systems can be classified on different basis of consideration. These basis are listed below:
On average particle concentration (modes)
On air pressure (Types of systems)
On air supply arrangement
On solid feeder type
Of these, the first two are very important and often influence the choice of the specific design for a given material, loading and delivery condition and the distance to be covered.
The basic Principles of Pneumatic conveying stated by Great Alexander in 100 BC itself. In pre historical age Romans used Water supply pipelines and sewage disposable systems. Chinese conveyed Natural gas through Bamboo’s. These are the evidence for transporting physical objects in Pneumatic tubes.
Types of bucket elevators: Bucket elevators are classified into three types. They classified according to the bucket spacing and mode of discharge. They are: 1. Centrifugal Discharge elevators 2. Continuous Discharge elevators 3. Positive Discharge Elevators Centrifugal Discharge Elevators: In a centrifugal discharge elevator, buckets are fixed on to belt or chain at regular pitch to avoid interference in loading
A bucket elevator is a conveyor for carrying bulk materials in a vertical or inclined path. Bucket elevators for the mechanical, vertical transportation of materials have become a crucial link in the production process in many industrial sectors. Typical elevator consists of: 1. An endless belt, 2. A chain or chains, to which buckets are attached, 3. Necessary loading and
Belt Conveyors for bulk materials: Take up Arrangement: All belt conveyors require the use of some form of take up device for the following reasons: 1. To ensure adequate tension of the belt leaving the drive pulley so us to avoid any slippage of the belt. 2. To ensure proper belt tension at the loading and other points along the
Selection of vibratory conveyor: The oscillating motion of the trough is achieved via specially designed inclined arms and an eccentric shaft driven by a motor through V-belts. The eccentric shaft is mounted on anti friction bearings and has V-pulleys at both ends with weights on them to counteract the unbalancing force. The rotation of the eccentric shaft provides a forward