Boiler feed pump
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When selecting a feed water pump, what are the criteria for choosing between a steam-driven pump and an electric pump?
When selecting a pump, only head and flow rate are generally considered. A steam-driven pump is used to ensure that the electric feed water pump can still operate in the event of a power outage!
I was wrong, thank you for the guidance downstairs! This post was last edited by firepwow on 2008-1-14 14:18]
The claim on the 3rd floor is incorrect; larger power plant boiler feed pumps are generally equipped with steam-driven pumps, as specified in the standards
The choice of pump depends on the actual circumstances. If there is an adequate supply of steam, steam-driven pumps are generally used as they help save energy; on the other hand, if there is no steam available and only electricity is present, then electric pumps are the only option. For large boilers, both steam pumps and electric pumps are usually used. As far as I know, some factories use three electric pumps along with two steam pumps.
I think steam pumps are mainly used to prevent power outages.
If the boiler has a high capacity, I recommend using a feed water pump driven by a steam turbine. This ensures stable operation, preventing shutdowns due to power outages or voltage fluctuations. Additionally, it helps save on external electricity costs, resulting in lower operating expenses for the boiler and greater economic efficiency. Of course, when driving the equipment, if there is no steam source available, it is recommended to use a pump driven by an electric motor to start the boiler. Once operation is normal, domestic-produced steam can be used, and steam turbine pumps can be employed to achieve efficient and optimized operation:handshake :handshake
In the design of large power plants, the steam-driven feed water pump can also achieve speed control by utilizing steam sources with different pressures and temperatures, which is very convenient.
In my opinion, there should be a power threshold regarding whether steam-driven or electric pumps should be used for boiler feed water pumps; that is, pumps with a certain power level or above can use steam-driven pumps, while if the pump’s power is very low, steam-driven pumps cannot be used even if a steam source is available.
For small facilities, small pumps, and those with special requirements regarding the production process, pneumatic pumps are usually used as a backup if conditions permit. As for large power stations such as power plants, decisions are generally made based on cost-effectiveness...
Electric pumps are generally used; otherwise, how can it be driven?
An electric pump is definitely necessary; it can only be used while the machine is running. When installing multiple pumps, steam-driven pumps can be considered as an option
Generally speaking, electric pumps are mainly used for operation, while steam pumps are primarily employed for emergency water supply to the boiler in case of a power outage
In large power plants, electric pumps are generally used for starting and stopping, while steam pumps are used during normal operation. It’s mainly to save power
Large companies first consider safety factors, and only then economic considerations when making a choice; therefore, the type of pump chosen depends mainly on one’s own circumstances