Dongming Petrochemical 13 million yuan "refining" sewage to further improve the quality of sewage discharge

Recently, Shandong Dongming Petrochemical Group invested 13 million yuan to build a 60-ton/hour acid water stripper to treat the sulfur-containing wastewater to further improve the quality of wastewater discharge.

With the increasingly stringent national environmental laws and regulations, whether or not the sewage can meet the standards has become a necessary condition for the survival of enterprises. Due to the earlier construction of Dongming Petrochemical's production facilities, some of the original environmental protection facilities could not meet current production and environmental protection needs. In order to meet the market demand, adapt to the complicated and changeable nature of crude oil, and increase the sulfur content of crude oil year after year, Dongming Petrochemical has invested in and built a new device to ensure that the wastewater meets the discharge standards and also changes into waste.

The designed capacity of the device is 60 tons/hour. The single-column pressurized stripping side-drainage ammonia extraction technology is adopted, and the ammonia in acidic water is separated by a three-stage partial condensation method and refined into industrial ammonia water. Carbon dioxide and hydrogen sulfide gas enter the acid gas system for processing. The purified water obtained after stripping can be used in other devices. The automatic control part of the entire plant uses DCS systems for production and process control.

After the device is completed, it can produce 59.6 tons of purified water, 0.38 tons of acid gas and 1.79 tons of industrial ammonia per hour. It can handle the annual production of 1.5 million tons of atmospheric and vacuum, and 300,000 tons of heavy oil catalytic cracking. The large amount of acidic water discharged by a 1 million-ton coking unit greatly improves the quality of sewage discharge.

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