ABSTRACT
In a chemical processing plant, utility services cover the generation of electricity and process steam and the provision of coolant for steam condensing and other process cooling. The pump services involved are fuel, condensate, boiler feed, and cooling water circulation. Pumping fuel oil to medium and large boilers is almost exclusively the province of triple screw pumps. When the steam turbine is condensing, a pump is necessary to pump the condensate from the hotwell in the first stage of raising the liquid to boiler pressure. In an open cycle, the condensate pump discharges into the deaerator. The boiler feed pump has to develop sufficient pressure to put water into the boiler drum after overcoming friction losses in the interconnecting piping and system. High speed single stage pumps are an alternative to multistage pumps for smaller boilers. The cooling water pump takes its suction from a natural water body, an artificial water body, or a cooling tower basin.
