Customized high-pressure pump with clever modular design
Both investment costs and lifecycle costs are taken into consideration when designing the optimal pump. An optimized hydraulic design guarantees maximum efficiency. M-series high-pressure stage casing pumps have a modular design. This allows Sulzer to find the most efficient solution to meet customer requirements, typically for feedwater pumps and start-up feedwater pumps for gas-fired combined-cycle power plants, among other applications.
Modular hydraulics for high efficiency in a wide range of operating conditions as required for gas-fired combined-cycle power plants
Optimized design for thermal conditions as applicable in gas-fired combined-cycle power plants
Centerline mounted with large branch sizes for optimized inlet flow, low noise level, and higher allowable forces and moments
Unaffected by rapid temperature variations and therewith highly suitable for gas-fired combined-cycle power plants where frequent start-stop operation is specified
Stiff shaft design for critical speeds above the maximum operating speed
Multiple screws mechanical tensioners are used on large sizes to allow simpler tightening and loosening
Main applications
The MD pumps are suitable for pumping clean or slightly polluted, hot or cold water. They have been specifically designed for application such as:
Main boiler feedwater pump in captive, independent, biomass, and industrial power plants
Main feedwater pump in gas-fired combined-cycle and concentrated solar power plants
Start-up boiler feedwater pump in utility thermal power plants
Boiler feed pumps for biomass firing power plants applications are typically small/medium ring section type. Axially split multistage pumps are also available when required. The pump size and the design pressure will depend very much of type and the output of the power plant.
Feed water pumps (FWP) pump the feed water from the de-aerator through the HP heaters to the boiler. The major characteristic of FWP is their high differential head.
Feed water pumps (FWP) pump the feed water from the de-aerator through the HP heaters to the heat recovery steam generator. The major characteristic of the FWP is their high differential head. In all sizes of gas-fired combined-cycle power plants, the FWP are horizontal ring section type; occasionally, they could also be barrel or axially split type.
Feed water pumps (FWP) pump feed water from the de-aerator through the HP heaters to the solar steam generator. The major characteristic of FWP is their high differential head. The FWP are usually horizontal ring section type, but depending on customer requirements, they can also be barrel or axially split type.
Sulzer’s extensive product portfolio to maximize the performance and reliability of your solid organic fuel biomass power plant, solid industrial or municipal waste fuel biomass power plant, and liquid or gaseous organic fuel biomass power plant processes.
The balance drum device carries the major proportion of the hydraulic thrust. The drum diameters are chosen to minimize the thrust at normal operating point. The residual and additional thrust loads occurring above/below the normal operating point are carried by the thrust bearing, typically a tilting pad.
The balance drum is suitable for:
Pumps operating at the end of the curve, up to 120% of the best efficiency point
Frequent start-stop applications thanks to nearly wear-free device
Balance disc
Balance disc
With a balance disc, the axial force is completely compensated; no axial thrust bearing is required. Due to the smaller balancing leakage flow, total efficiency of the pump is higher than the pump efficiency with the balance drum design.
For pumps with frequent start-stop operations, the installation of a mechanical or magnetic (PERMAVORTM) lift-off device is recommended.
Mechanical or magnetic (PERMAVORTM) lift-off devices
Advantages:
Prevent touching and wear of disc/counter disc operation at low speed such as start-up and shut-down
Self-controlling passive systems
Reduce load on balance disc under normal operation
Offer long service life
MD high pressure pump (up to 350 bar)
High pressure design
Design pressure (MAWP) up to 350 bar
Extended flow and head range meet the requirements of the steam-water cycle for the latest heavy-duty high-output gas turbine developments
Advanced design to accommodate steep thermal transient conditions (upwards and downwards)
Wherever fluids are pumped, mixed, controlled or applied, we are there. See how our solutions create value for customers and learn how we can make your pumping and mixing processes more efficient and profitable, safeguarding your production and ensuring lasting reliability.
As the global demand for electrical energy continues to grow, more power plants are being built and their designs have to accommodate the changing requirements of the power generation market. Gas turbine manufacturers have developed larger and more efficient units, which need to be supported by advanced feedwater pumps (FWP) to ensure long-term reliability as well as cost-effectiveness. Sulzer's pumps offer industry-leading availability with a robust construction and very low maintenance requirements.
