Discussion on the control scheme of the acidic water stripping tower.

The single-tower pressurized stripping ammonia extraction process involves using a single tower to treat acidic water at a pressure of 0.5 MPa, with ammonia-rich gas being extracted via a side stream for further purification to recover liquid ammonia. After degassing and oil removal, the acidic raw water is fed separately as hot and cold streams into the top and upper middle part of the stripping tower. The bottom of the tower is heated for stripping using 1.0 MPa steam, and the purified water from the bottom of the tower is cooled before being sent back to upstream units for reuse ； The acidic gas at the top of the tower is sent to a sulfur recovery unit for sulfur recovery, while the ammonia-rich gas is extracted from the middle part of the tower; after three stages of fractional condensation, it is either burned or further refined for recovery. This process has a simple flow, low steam consumption, and a certain degree of tolerance to the concentrations of hydrogen sulfide and ammonia in acidic water; the quality of the ammonia gas produced as a by-product meets the standards for qualified products as defined by national regulations. It is suitable for acid water stripping units with large processing capacities, and is used by factories that have a demand for the by-product ammonia or that have a way to utilize it.