When horizontal water tube evaporation is used in the convection section, how should the convection tubes be designed?
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When using horizontal water-cooled tubes to evaporate steam in the convection section, how should the convection tubes be designed? How to avoid gas-water separation? Is it used much in actual production? Those who have done it, please share your insights! :)
The water pipes are arranged at an inclined angle, with the inclination angle determined by hydraulic calculations; refer to JBZ201 for these calculations. Sufficient head pressure is required to ensure safe water circulation.
I have done cases where the pipe inclination is greater than 15°, but I haven’t dealt with those where it’s less than 15° or horizontal; I’m not sure. Do you have any relevant examples?
We usually tilt it by about 7°. High-pressure and sub-high-pressure boilers, with a height difference between the boiler drum and other components of around 20 meters. So it’s still more reliable to look at the water cycle.