Lots of Pumps used in Power Plants according to Hot Topic Speakers August 30          

One of the speakers was Greg Morrison, Product Manager Boiler Feed Water Pumps at Flowserve Corporation, Pump Division. He discussed the application of boiler feed pumps in combined cycle, thermo-solar and biomass-fired power plants. He covered the types, sizes and required features of boiler feed pumps. The trend is away from barrel and split casing pumps and toward ring sectional pumps which are less costly and start up faster. This fast startup is a big advantage in combined cycle plants which are used for peaking service. The negative side of ring sectional pumps is that they must be fully removed to obtain access to the impeller. However, this may only be necessary every seven years. Ring sectional pumps are available with capabilities up to 5,000 gpm, 8000 feet of head, 4,000 PSIG and rotation at 5,000 rpm.

Remote operation is now possible thanks to wireless technology. Flowserve maximizes this opportunity by offering to provide remote monitoring and advice. Variable speed operation allows minimum energy consumption. Fluid couplings, steam turbine drives, and variable fluid drives are being utilized to accomplish this.

Tom Tschanz, senior consultant at McIlvaine Company, provided process flow diagrams and descriptions of some of the many pump applications in the power industry.

• Primary Pump Systems include:
   
  • Boiler Feed Pumps (primary and startup)
  • Condensate Pump
  • Cooling Water Circulation Pump
  • Cooling Water Make-up Pump
  • Heater Drain Pumps

• Boiler Feed Pumps

• High pressure, high flow barrel type multi-stage centrifugal pumps rated ^~5000 gpm and 2400 psi for major utility power plant systems (pressures will vary for subcritical vs. supercritical).

• Condensate Pumps

• High flow centrifugal pumps rated ^~5000 gpm to move condensate from the condenser hot well to a deaerator and back to the feed water stream ahead of the boiler.

• Once-through Systems

• Pump surface water through cooling unit and directly back to source (lake, river, or ocean).

• Loop Systems

• Circulating Pumps

• Large centrifugals rated 100,000 gpm or more. Total coolant flow more than 200,000 gpm for a 400 MW plant.

• Makeup Water Pumps

• Large centrifugals rated 5,000 gpm. Makeup is typically two percent to three percent of total flow and is required to replace water lost to windage, evaporation, and blowdown.

• Secondary Pumps include:

• Chemical Feed Pumps
• Chemical Transfer Pumps
• Fuel Transfer Pumps
• Fuel Injection Pumps
• Slurry Pumps and De-watering Pumps
• Lubrication Pumps
• Service Water Pumps, Fire Service Pumps, others.

Tom briefly discussed the market and referenced the forecasts in the McIlvaine Pumps: World Market report.

(Millions)

Centrifugal pumps represent 65 percent of the market with the remaining 35 percent divided among diaphragm, reciprocating and rotary designs.

The Bios, Abstract and Photo can be seen at: Bios, Abstract, Photo - August 30, 2012.htm

The individual presentations are as follows:

• Pumps for Power Plants, Boilers and Water Treatment Facilities Combined Cycle Plants - Webinar - Hot Topic Hour August 30, 2012

§  Application of Boiler Feed Pumps in Combined Cycle, Thermosolar, & Biomass by Greg Morrison, Flowserve - Hot Topic Hour August 30, 2012

 

§  Power Plant Pumps by Tom Tschanz, McIlvaine Company - Hot Topic Hour August 30, 2012