I’ll come up with a question related to boilers; those in the top 30 will receive a certain score
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To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than ( ) M/S. A) 0.3. B)0.4。 C)0.5。 D)0.6。 E)0.7。 The answer is: B) 0.4.
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than (A) M/S. A) 0.3. B)0.4。 C)0.5。 D)0.6。 E)0.7。
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than (0.3) M/S.
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than ( ) M/S. C) 0.5
A, not less than 0.3--------------------------------------
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than ( ) M/S. A) 0.3
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than (B) M/S.
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than (A 0.3) M/S. A) 0.3. B)0.4。 C)0.5。 D)0.6。 E)0.7 Generally, it is stipulated that the water velocity in the non-boiling section of non-boiling or boiling economizers should not be less than 0.3 m/s, while in the boiling section of boiling economizers it should not be less than 1 m/s. The high water flow rate results in excessive flow resistance for the water passing through the economizer. If the water flow rate is too low, it is difficult to expel gases, leading to air blockages within the pipes as well as localized corrosion on the inner walls of the pipes ； In a boiling economizer, vapor-water stratification occurs, leading to fatigue damage of the tubes.
To prevent corrosion of the water wall tubes, the flow velocity of water in the non-boiling economizer should be no less than (A) 0.3) M/S.