Abstract: The pH of the condensed acidic water of the shift gas from hydrogen plant was on the low side and not qualified after it was steam stripped, resulting waste water and corrosion of equipments. The trial test found that little effect was observed through adjusting steam consumption. The trouble is solved by revamping of the condensation process of the shift gas. After revamping, the pH of condensed water satisfies the quality requirement of the recycling water. A large amount of water is recycled and corrosion of equipment is avoided. The benefit of 2.774 4 million Yuan was produced in first year because the technical renovation cost is one-time investment. Since the second year after revamping, the economic benefits of 3.924 4 million Yuan/a can be obtained.

Key words: hydrogen plant, stripping tower for acidic water, pH, recycling