Dynamic pumps are also characterized by their mode of operation: a rotating impellerconverts kinetic energy into pressure or velocity that is needed to pump the fluid.There are two types of dynamic pumps: Centrifugal pumps are the most common pumps used for pumping water in industrialapplications. Typically, more than 75% of the pumps installed in an industry arecentrifugal pumps. For this reason, this pump is further described below.
Special effect pumps are particularly used for specialized conditions at an industrial site.2.2.1 How a centrifugal pump worksA centrifugal pump is one of the simplest pieces of equipment in any process plant. Figure 8shows how this type of pump operates:
Liquid is forced into an impeller either by atmospheric pressure, or in case of a jet pumpby artificial pressure.
The vanes of impeller pass kinetic energy to the liquid, thereby causing the liquid torotate. The liquid leaves the impeller at high velocity.
The impeller is surrounded by a volute casing or in case of a turbine pump a stationarydiffuser ring. The volute or stationary diffuser ring converts the kinetic energy intopressure energy.
Electrical Energy Equipment: Pumps and Pumping Systems
没有评论:
发表评论