Water problems in hydrogen production furnaces
Thread Content
Why is the pH value of the boiler water in hydrocarbon steam reforming hydrogen production units required to be 9-11?
(1) At low pH values, the corrosivity of the boiler water on steel increases. (2) The reaction between phosphate ions and calcium ions in the furnace water allows for the formation of slag that can be easily removed, only when the pH value reaches a certain level. (3) To suppress the hydrolysis of silicate in the boiler water and reduce the amount of silica carried in the steam. However, the pH value of the boiler water should not be too high either; in other words, it generally should not exceed 11. If the pH value of the boiler water is very high, it can easily lead to alkaline corrosion.