Capsule pipeline types

Pipelines to transport soHds are called freight pipelines, of which three different types exist pneumatic pipelines, the use of which is known as pneumotransport or pneumatic conveying slurry pipelines, which may also be called hydrotransport or hydrauHc conveying and capsule pipelines. When air or inert gas is used to move the soHds in the pipeline, the system is called a pneumatic pipeline and often involves a wheeled vehicle inside the pipeline, propelled by air moving through the pipe (25). Slurry pipelines involve the transport of soHd particles suspended in water or another inert Hquid. HydrauHc capsule pipelines transport soHd material within cylindrical containers, using water flow through the pipeline for propulsion. 

Different types of capsule pipelines require different capsule designs. Information on designing capsules for PCP can be found in Refs. and from the vendors of PCP for HCP it can be found in Ref.. Usually, several PCP capsules are linked together to form a train, and there are usually more than one train moving through the pipe at any time. In contrast, HCP capsules are not linked—they operate better without being linked because collision between capsules is not a problem for HCP. 

A third type of HCP is PRCP, in which the capsule is made of the product (goods) to be transported, and no capsule shell or container is needed at all. This alleviates the need for both containers and the return pipeline. This type of HCP has been developed for transporting coal—the coal log pipeline (CLP). The CLP technology was studied extensively for lOyr... 

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