Weekly Question for July 2017 (Week 2)
Thread Content
This post was last edited by hai8487 on 2017-7-11 16:49. What are the causes of cavitation in feedwater pumps? Answer: The reasons for cavitation in the feed water pump are: ① A decrease in pressure inside the deaerator. ② The water level in the deaeration tank is too low. ③ The feed water pump operates for extended periods at low flow rates or under no-load conditions. ④ If the feed pump recirculation valve closes incorrectly or is set too low, the feed pump will operate in a sealed condition. 2017: Coal Chemical Industry – “My Technical Upgrades” http://bbs.hcbbs.com/thread-1786290-1-1.html Petrochemical Sector – “Creative Ideas for Energy Savings” event (the second phase is currently in progress) http://bbs.hcbbs.com/thread-1666758-1-1.html
1) Decrease in pressure inside the deaerator； 2) The water level in the deaeration tank is too low ； 3) The feed water pump operates for extended periods at low flow rates or under no-load conditions ； 4) The feed pump recirculation valve closes accidentally or is opened too slightly, causing the feed pump to operate in a choked condition.
1. The pressure inside the deaerator decreases. 2. The water level in the deaeration tank is too low. 3. The feed water pump operates for long periods at low flow rates or under no-load conditions. 4. The recirculation valve of the feed water pump closes accidentally or is opened too slightly, causing the feed water pump to operate in a choked condition.
Low pump flow, low deaerator pressure, low water tank level
⑴ The pressure inside the deaerator decreases. ⑵ The water level in the deaerator tank is too low. ⑶ The feed water pump operates for extended periods at low flow rates or under no-load conditions. ⑷ If the feed pump recirculation valve closes incorrectly or is set too low, the feed pump will operate in a sealed condition.
The installation height is too high, causing water intake obstruction and excessive rotation speed
1) Decrease in pressure inside the deaerator； 2) The water level in the deaeration tank is too low ； 3) The feed water pump operates for extended periods at low flow rates or under no-load conditions ； 4) The feed pump recirculation valve closes accidentally or is opened too slightly, causing the feed pump to operate in a choked condition.
The reasons for cavitation in the feed water pump are: ① A decrease in pressure inside the deaerator. ② The water level in the deaeration tank is too low. ③ The feed water pump operates for extended periods at low flow rates or under no-load conditions. ④ If the feed pump recirculation valve closes incorrectly or is set too low, the feed pump will operate in a sealed condition.
⑴ The pressure inside the deaerator decreases. ⑵ The water level in the deaerator tank is too low. ⑶ The feed water pump operates for extended periods at low flow rates or under no-load conditions. ⑷ If the recirculation valve of the feed water pump closes accidentally or is opened too slightly, the feed water pump will operate in a sealed condition.
1) Decrease in pressure inside the deaerator； 2) The water level in the deaeration tank is too low ； 3) The feed water pump operates for extended periods at low flow rates or under no-load conditions ； 4) The feed pump recirculation valve closes accidentally or is opened too slightly, causing the feed pump to operate in a choked condition.