What are the requirements for the flow velocity of water in the non-boiling section of the economizer?

2011-07-10View Original

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What are the requirements for the flow velocity of water in the non-boiling section of the economizer?

Reply #22011-07-10

For boiling type, it should be no less than 1 m/s to prevent vapor layering. It should not exceed 2 m/s under any circumstances, otherwise the resistance will be too high.

Reply #32011-07-11

This post was last edited by ssun*nhong on 2011-7-15 08:35. For non-boiling economizers, the average flow velocity of cast-iron economizers at rated load should be greater than 0.3 m/s； The resistance of the economizer generally does not exceed 8% of the operating pressure of the boiler drum.

Reply #42011-07-11

The flow velocity inside the economizer tubes should not be less than 0.3 m/s to prevent bubble formation. It also shouldn’t be too high, as a high water flow rate consumes excessive electrical energy.

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